//===-- sanitizer_common_interceptors.inc -----------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Common function interceptors for tools like AddressSanitizer,
// ThreadSanitizer, MemorySanitizer, etc.
//
// This file should be included into the tool's interceptor file,
// which has to define it's own macros:
//   COMMON_INTERCEPTOR_ENTER
//   COMMON_INTERCEPTOR_ENTER_NOIGNORE
//   COMMON_INTERCEPTOR_READ_RANGE
//   COMMON_INTERCEPTOR_WRITE_RANGE
//   COMMON_INTERCEPTOR_INITIALIZE_RANGE
//   COMMON_INTERCEPTOR_DIR_ACQUIRE
//   COMMON_INTERCEPTOR_FD_ACQUIRE
//   COMMON_INTERCEPTOR_FD_RELEASE
//   COMMON_INTERCEPTOR_FD_ACCESS
//   COMMON_INTERCEPTOR_SET_THREAD_NAME
//   COMMON_INTERCEPTOR_ON_DLOPEN
//   COMMON_INTERCEPTOR_ON_EXIT
//   COMMON_INTERCEPTOR_MUTEX_LOCK
//   COMMON_INTERCEPTOR_MUTEX_UNLOCK
//   COMMON_INTERCEPTOR_MUTEX_REPAIR
//   COMMON_INTERCEPTOR_SET_PTHREAD_NAME
//   COMMON_INTERCEPTOR_HANDLE_RECVMSG
//   COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED
//===----------------------------------------------------------------------===//

#include "interception/interception.h"
#include "sanitizer_addrhashmap.h"
#include "sanitizer_placement_new.h"
#include "sanitizer_platform_interceptors.h"
#include "sanitizer_tls_get_addr.h"

#include <stdarg.h>

#if SANITIZER_INTERCEPTOR_HOOKS
#define CALL_WEAK_INTERCEPTOR_HOOK(f, ...)                                     \
  do {                                                                         \
    if (f)                                                                     \
      f(__VA_ARGS__);                                                          \
  } while (false);
#define DECLARE_WEAK_INTERCEPTOR_HOOK(f, ...)                                  \
  extern "C" {                                                                 \
  SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE void f(__VA_ARGS__);  \
  } // extern "C"
#else
#define DECLARE_WEAK_INTERCEPTOR_HOOK(f, ...)
#define CALL_WEAK_INTERCEPTOR_HOOK(f, ...)

#endif  // SANITIZER_INTERCEPTOR_HOOKS

#if SANITIZER_WINDOWS && !defined(va_copy)
#define va_copy(dst, src) ((dst) = (src))
#endif // _WIN32

#if SANITIZER_FREEBSD
#define pthread_setname_np pthread_set_name_np
#define inet_aton __inet_aton
#define inet_pton __inet_pton
#define iconv __bsd_iconv
#endif

#ifndef COMMON_INTERCEPTOR_INITIALIZE_RANGE
#define COMMON_INTERCEPTOR_INITIALIZE_RANGE(p, size) {}
#endif

#ifndef COMMON_INTERCEPTOR_UNPOISON_PARAM
#define COMMON_INTERCEPTOR_UNPOISON_PARAM(count) {}
#endif

#ifndef COMMON_INTERCEPTOR_FD_ACCESS
#define COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd) {}
#endif

#ifndef COMMON_INTERCEPTOR_MUTEX_LOCK
#define COMMON_INTERCEPTOR_MUTEX_LOCK(ctx, m) {}
#endif

#ifndef COMMON_INTERCEPTOR_MUTEX_UNLOCK
#define COMMON_INTERCEPTOR_MUTEX_UNLOCK(ctx, m) {}
#endif

#ifndef COMMON_INTERCEPTOR_MUTEX_REPAIR
#define COMMON_INTERCEPTOR_MUTEX_REPAIR(ctx, m) {}
#endif

#ifndef COMMON_INTERCEPTOR_HANDLE_RECVMSG
#define COMMON_INTERCEPTOR_HANDLE_RECVMSG(ctx, msg) ((void)(msg))
#endif

#ifndef COMMON_INTERCEPTOR_FILE_OPEN
#define COMMON_INTERCEPTOR_FILE_OPEN(ctx, file, path) {}
#endif

#ifndef COMMON_INTERCEPTOR_FILE_CLOSE
#define COMMON_INTERCEPTOR_FILE_CLOSE(ctx, file) {}
#endif

#ifndef COMMON_INTERCEPTOR_LIBRARY_LOADED
#define COMMON_INTERCEPTOR_LIBRARY_LOADED(filename, handle) {}
#endif

#ifndef COMMON_INTERCEPTOR_LIBRARY_UNLOADED
#define COMMON_INTERCEPTOR_LIBRARY_UNLOADED() {}
#endif

#ifndef COMMON_INTERCEPTOR_ENTER_NOIGNORE
#define COMMON_INTERCEPTOR_ENTER_NOIGNORE(ctx, ...) \
  COMMON_INTERCEPTOR_ENTER(ctx, __VA_ARGS__)
#endif

#ifndef COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED
#define COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED (0)
#endif

#define COMMON_INTERCEPTOR_READ_STRING_OF_LEN(ctx, s, len, n)       \
    COMMON_INTERCEPTOR_READ_RANGE((ctx), (s),                       \
      common_flags()->strict_string_checks ? (len) + 1 : (n) )

#define COMMON_INTERCEPTOR_READ_STRING(ctx, s, n)                   \
    COMMON_INTERCEPTOR_READ_STRING_OF_LEN((ctx), (s), REAL(strlen)(s), (n))

#ifndef COMMON_INTERCEPTOR_ON_DLOPEN
#define COMMON_INTERCEPTOR_ON_DLOPEN(filename, flag) {}
#endif

#ifndef COMMON_INTERCEPTOR_GET_TLS_RANGE
#define COMMON_INTERCEPTOR_GET_TLS_RANGE(begin, end) *begin = *end = 0;
#endif

#ifndef COMMON_INTERCEPTOR_ACQUIRE
#define COMMON_INTERCEPTOR_ACQUIRE(ctx, u) {}
#endif

#ifndef COMMON_INTERCEPTOR_RELEASE
#define COMMON_INTERCEPTOR_RELEASE(ctx, u) {}
#endif

struct FileMetadata {
  // For open_memstream().
  char **addr;
  SIZE_T *size;
};

struct CommonInterceptorMetadata {
  enum {
    CIMT_INVALID = 0,
    CIMT_FILE
  } type;
  union {
    FileMetadata file;
  };
};

typedef AddrHashMap<CommonInterceptorMetadata, 31051> MetadataHashMap;

static MetadataHashMap *interceptor_metadata_map;

#if SI_NOT_WINDOWS
UNUSED static void SetInterceptorMetadata(__sanitizer_FILE *addr,
                                          const FileMetadata &file) {
  MetadataHashMap::Handle h(interceptor_metadata_map, (uptr)addr);
  CHECK(h.created());
  h->type = CommonInterceptorMetadata::CIMT_FILE;
  h->file = file;
}

UNUSED static const FileMetadata *GetInterceptorMetadata(
    __sanitizer_FILE *addr) {
  MetadataHashMap::Handle h(interceptor_metadata_map, (uptr)addr,
                            /* remove */ false,
                            /* create */ false);
  if (h.exists()) {
    CHECK(!h.created());
    CHECK(h->type == CommonInterceptorMetadata::CIMT_FILE);
    return &h->file;
  } else {
    return 0;
  }
}

UNUSED static void DeleteInterceptorMetadata(void *addr) {
  MetadataHashMap::Handle h(interceptor_metadata_map, (uptr)addr, true);
  CHECK(h.exists());
}
#endif  // SI_NOT_WINDOWS

#if SANITIZER_INTERCEPT_TEXTDOMAIN
INTERCEPTOR(char*, textdomain, const char *domainname) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, textdomain, domainname);
  COMMON_INTERCEPTOR_READ_STRING(ctx, domainname, 0);
  char *domain = REAL(textdomain)(domainname);
  if (domain) {
    COMMON_INTERCEPTOR_INITIALIZE_RANGE(domain, REAL(strlen)(domain) + 1);
  }
  return domain;
}
#define INIT_TEXTDOMAIN COMMON_INTERCEPT_FUNCTION(textdomain)
#else
#define INIT_TEXTDOMAIN
#endif

#if SANITIZER_INTERCEPT_STRCMP
static inline int CharCmpX(unsigned char c1, unsigned char c2) {
  return (c1 == c2) ? 0 : (c1 < c2) ? -1 : 1;
}

DECLARE_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strcmp, uptr called_pc,
                              const char *s1, const char *s2)

INTERCEPTOR(int, strcmp, const char *s1, const char *s2) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strcmp, s1, s2);
  CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strcmp, GET_CALLER_PC(), s1,
                             s2);
  unsigned char c1, c2;
  uptr i;
  for (i = 0;; i++) {
    c1 = (unsigned char)s1[i];
    c2 = (unsigned char)s2[i];
    if (c1 != c2 || c1 == '\0') break;
  }
  COMMON_INTERCEPTOR_READ_STRING(ctx, s1, i + 1);
  COMMON_INTERCEPTOR_READ_STRING(ctx, s2, i + 1);
  return CharCmpX(c1, c2);
}

DECLARE_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strncmp, uptr called_pc,
                              const char *s1, const char *s2, uptr n)

INTERCEPTOR(int, strncmp, const char *s1, const char *s2, uptr size) {
  if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)
    return internal_strncmp(s1, s2, size);
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strncmp, s1, s2, size);
  CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strncmp, GET_CALLER_PC(), s1,
                             s2, size);
  unsigned char c1 = 0, c2 = 0;
  uptr i;
  for (i = 0; i < size; i++) {
    c1 = (unsigned char)s1[i];
    c2 = (unsigned char)s2[i];
    if (c1 != c2 || c1 == '\0') break;
  }
  COMMON_INTERCEPTOR_READ_RANGE(ctx, s1, Min(i + 1, size));
  COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, Min(i + 1, size));
  return CharCmpX(c1, c2);
}

#define INIT_STRCMP COMMON_INTERCEPT_FUNCTION(strcmp)
#define INIT_STRNCMP COMMON_INTERCEPT_FUNCTION(strncmp)
#else
#define INIT_STRCMP
#define INIT_STRNCMP
#endif

#if SANITIZER_INTERCEPT_STRCASECMP
static inline int CharCaseCmp(unsigned char c1, unsigned char c2) {
  int c1_low = ToLower(c1);
  int c2_low = ToLower(c2);
  return c1_low - c2_low;
}

INTERCEPTOR(int, strcasecmp, const char *s1, const char *s2) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strcasecmp, s1, s2);
  unsigned char c1 = 0, c2 = 0;
  uptr i;
  for (i = 0;; i++) {
    c1 = (unsigned char)s1[i];
    c2 = (unsigned char)s2[i];
    if (CharCaseCmp(c1, c2) != 0 || c1 == '\0') break;
  }
  COMMON_INTERCEPTOR_READ_STRING(ctx, s1, i + 1);
  COMMON_INTERCEPTOR_READ_STRING(ctx, s2, i + 1);
  return CharCaseCmp(c1, c2);
}

INTERCEPTOR(int, strncasecmp, const char *s1, const char *s2, SIZE_T n) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strncasecmp, s1, s2, n);
  unsigned char c1 = 0, c2 = 0;
  uptr i;
  for (i = 0; i < n; i++) {
    c1 = (unsigned char)s1[i];
    c2 = (unsigned char)s2[i];
    if (CharCaseCmp(c1, c2) != 0 || c1 == '\0') break;
  }
  COMMON_INTERCEPTOR_READ_RANGE(ctx, s1, Min(i + 1, n));
  COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, Min(i + 1, n));
  return CharCaseCmp(c1, c2);
}

#define INIT_STRCASECMP COMMON_INTERCEPT_FUNCTION(strcasecmp)
#define INIT_STRNCASECMP COMMON_INTERCEPT_FUNCTION(strncasecmp)
#else
#define INIT_STRCASECMP
#define INIT_STRNCASECMP
#endif

#if SANITIZER_INTERCEPT_STRSTR || SANITIZER_INTERCEPT_STRCASESTR
static inline void StrstrCheck(void *ctx, char *r, const char *s1,
                               const char *s2) {
    uptr len1 = REAL(strlen)(s1);
    uptr len2 = REAL(strlen)(s2);
    COMMON_INTERCEPTOR_READ_STRING_OF_LEN(ctx, s1, len1,
                                          r ? r - s1 + len2 : len1 + 1);
    COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, len2 + 1);
}
#endif

#if SANITIZER_INTERCEPT_STRSTR
INTERCEPTOR(char*, strstr, const char *s1, const char *s2) {
  if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)
    return internal_strstr(s1, s2);
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strstr, s1, s2);
  char *r = REAL(strstr)(s1, s2);
  if (common_flags()->intercept_strstr)
    StrstrCheck(ctx, r, s1, s2);
  return r;
}

#define INIT_STRSTR COMMON_INTERCEPT_FUNCTION(strstr);
#else
#define INIT_STRSTR
#endif

#if SANITIZER_INTERCEPT_STRCASESTR
INTERCEPTOR(char*, strcasestr, const char *s1, const char *s2) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strcasestr, s1, s2);
  char *r = REAL(strcasestr)(s1, s2);
  if (common_flags()->intercept_strstr)
    StrstrCheck(ctx, r, s1, s2);
  return r;
}

#define INIT_STRCASESTR COMMON_INTERCEPT_FUNCTION(strcasestr);
#else
#define INIT_STRCASESTR
#endif

#if SANITIZER_INTERCEPT_STRSPN
INTERCEPTOR(SIZE_T, strspn, const char *s1, const char *s2) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strspn, s1, s2);
  SIZE_T r = REAL(strspn)(s1, s2);
  if (common_flags()->intercept_strspn) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, REAL(strlen)(s2) + 1);
    COMMON_INTERCEPTOR_READ_STRING(ctx, s1, r + 1);
  }
  return r;
}

INTERCEPTOR(SIZE_T, strcspn, const char *s1, const char *s2) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strcspn, s1, s2);
  SIZE_T r = REAL(strcspn)(s1, s2);
  if (common_flags()->intercept_strspn) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, REAL(strlen)(s2) + 1);
    COMMON_INTERCEPTOR_READ_STRING(ctx, s1, r + 1);
  }
  return r;
}

#define INIT_STRSPN \
  COMMON_INTERCEPT_FUNCTION(strspn); \
  COMMON_INTERCEPT_FUNCTION(strcspn);
#else
#define INIT_STRSPN
#endif

#if SANITIZER_INTERCEPT_STRPBRK
INTERCEPTOR(char *, strpbrk, const char *s1, const char *s2) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strpbrk, s1, s2);
  char *r = REAL(strpbrk)(s1, s2);
  if (common_flags()->intercept_strpbrk) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, REAL(strlen)(s2) + 1);
    COMMON_INTERCEPTOR_READ_STRING(ctx, s1,
        r ? r - s1 + 1 : REAL(strlen)(s1) + 1);
  }
  return r;
}

#define INIT_STRPBRK COMMON_INTERCEPT_FUNCTION(strpbrk);
#else
#define INIT_STRPBRK
#endif

#if SANITIZER_INTERCEPT_MEMCMP

DECLARE_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_memcmp, uptr called_pc,
                              const void *s1, const void *s2, uptr n)

INTERCEPTOR(int, memcmp, const void *a1, const void *a2, uptr size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, memcmp, a1, a2, size);
  if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)
    return internal_memcmp(a1, a2, size);
  CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_memcmp, GET_CALLER_PC(), a1,
                             a2, size);
  if (common_flags()->intercept_memcmp) {
    if (common_flags()->strict_memcmp) {
      // Check the entire regions even if the first bytes of the buffers are
      // different.
      COMMON_INTERCEPTOR_READ_RANGE(ctx, a1, size);
      COMMON_INTERCEPTOR_READ_RANGE(ctx, a2, size);
      // Fallthrough to REAL(memcmp) below.
    } else {
      unsigned char c1 = 0, c2 = 0;
      const unsigned char *s1 = (const unsigned char*)a1;
      const unsigned char *s2 = (const unsigned char*)a2;
      uptr i;
      for (i = 0; i < size; i++) {
        c1 = s1[i];
        c2 = s2[i];
        if (c1 != c2) break;
      }
      COMMON_INTERCEPTOR_READ_RANGE(ctx, s1, Min(i + 1, size));
      COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, Min(i + 1, size));
      return CharCmpX(c1, c2);
    }
  }
  return REAL(memcmp(a1, a2, size));
}

#define INIT_MEMCMP COMMON_INTERCEPT_FUNCTION(memcmp)
#else
#define INIT_MEMCMP
#endif

#if SANITIZER_INTERCEPT_MEMCHR
INTERCEPTOR(void*, memchr, const void *s, int c, SIZE_T n) {
  if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)
    return internal_memchr(s, c, n);
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, memchr, s, c, n);
  void *res = REAL(memchr)(s, c, n);
  uptr len = res ? (char *)res - (const char *)s + 1 : n;
  COMMON_INTERCEPTOR_READ_RANGE(ctx, s, len);
  return res;
}

#define INIT_MEMCHR COMMON_INTERCEPT_FUNCTION(memchr)
#else
#define INIT_MEMCHR
#endif

#if SANITIZER_INTERCEPT_MEMRCHR
INTERCEPTOR(void*, memrchr, const void *s, int c, SIZE_T n) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, memrchr, s, c, n);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, s, n);
  return REAL(memrchr)(s, c, n);
}

#define INIT_MEMRCHR COMMON_INTERCEPT_FUNCTION(memrchr)
#else
#define INIT_MEMRCHR
#endif

#if SANITIZER_INTERCEPT_FREXP
INTERCEPTOR(double, frexp, double x, int *exp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, frexp, x, exp);
  // Assuming frexp() always writes to |exp|.
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, exp, sizeof(*exp));
  double res = REAL(frexp)(x, exp);
  return res;
}

#define INIT_FREXP COMMON_INTERCEPT_FUNCTION(frexp);
#else
#define INIT_FREXP
#endif  // SANITIZER_INTERCEPT_FREXP

#if SANITIZER_INTERCEPT_FREXPF_FREXPL
INTERCEPTOR(float, frexpf, float x, int *exp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, frexpf, x, exp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  float res = REAL(frexpf)(x, exp);
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, exp, sizeof(*exp));
  return res;
}

INTERCEPTOR(long double, frexpl, long double x, int *exp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, frexpl, x, exp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  long double res = REAL(frexpl)(x, exp);
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, exp, sizeof(*exp));
  return res;
}

#define INIT_FREXPF_FREXPL           \
  COMMON_INTERCEPT_FUNCTION(frexpf); \
  COMMON_INTERCEPT_FUNCTION(frexpl)
#else
#define INIT_FREXPF_FREXPL
#endif  // SANITIZER_INTERCEPT_FREXPF_FREXPL

#if SI_NOT_WINDOWS
static void write_iovec(void *ctx, struct __sanitizer_iovec *iovec,
                        SIZE_T iovlen, SIZE_T maxlen) {
  for (SIZE_T i = 0; i < iovlen && maxlen; ++i) {
    SSIZE_T sz = Min(iovec[i].iov_len, maxlen);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, iovec[i].iov_base, sz);
    maxlen -= sz;
  }
}

static void read_iovec(void *ctx, struct __sanitizer_iovec *iovec,
                       SIZE_T iovlen, SIZE_T maxlen) {
  COMMON_INTERCEPTOR_READ_RANGE(ctx, iovec, sizeof(*iovec) * iovlen);
  for (SIZE_T i = 0; i < iovlen && maxlen; ++i) {
    SSIZE_T sz = Min(iovec[i].iov_len, maxlen);
    COMMON_INTERCEPTOR_READ_RANGE(ctx, iovec[i].iov_base, sz);
    maxlen -= sz;
  }
}
#endif

#if SANITIZER_INTERCEPT_READ
INTERCEPTOR(SSIZE_T, read, int fd, void *ptr, SIZE_T count) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, read, fd, ptr, count);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SSIZE_T res = REAL(read)(fd, ptr, count);
  if (res > 0) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, res);
  if (res >= 0 && fd >= 0) COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
  return res;
}
#define INIT_READ COMMON_INTERCEPT_FUNCTION(read)
#else
#define INIT_READ
#endif

#if SANITIZER_INTERCEPT_PREAD
INTERCEPTOR(SSIZE_T, pread, int fd, void *ptr, SIZE_T count, OFF_T offset) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pread, fd, ptr, count, offset);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SSIZE_T res = REAL(pread)(fd, ptr, count, offset);
  if (res > 0) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, res);
  if (res >= 0 && fd >= 0) COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
  return res;
}
#define INIT_PREAD COMMON_INTERCEPT_FUNCTION(pread)
#else
#define INIT_PREAD
#endif

#if SANITIZER_INTERCEPT_PREAD64
INTERCEPTOR(SSIZE_T, pread64, int fd, void *ptr, SIZE_T count, OFF64_T offset) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pread64, fd, ptr, count, offset);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SSIZE_T res = REAL(pread64)(fd, ptr, count, offset);
  if (res > 0) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, res);
  if (res >= 0 && fd >= 0) COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
  return res;
}
#define INIT_PREAD64 COMMON_INTERCEPT_FUNCTION(pread64)
#else
#define INIT_PREAD64
#endif

#if SANITIZER_INTERCEPT_READV
INTERCEPTOR_WITH_SUFFIX(SSIZE_T, readv, int fd, __sanitizer_iovec *iov,
                        int iovcnt) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, readv, fd, iov, iovcnt);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  SSIZE_T res = REAL(readv)(fd, iov, iovcnt);
  if (res > 0) write_iovec(ctx, iov, iovcnt, res);
  if (res >= 0 && fd >= 0) COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
  return res;
}
#define INIT_READV COMMON_INTERCEPT_FUNCTION(readv)
#else
#define INIT_READV
#endif

#if SANITIZER_INTERCEPT_PREADV
INTERCEPTOR(SSIZE_T, preadv, int fd, __sanitizer_iovec *iov, int iovcnt,
            OFF_T offset) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, preadv, fd, iov, iovcnt, offset);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  SSIZE_T res = REAL(preadv)(fd, iov, iovcnt, offset);
  if (res > 0) write_iovec(ctx, iov, iovcnt, res);
  if (res >= 0 && fd >= 0) COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
  return res;
}
#define INIT_PREADV COMMON_INTERCEPT_FUNCTION(preadv)
#else
#define INIT_PREADV
#endif

#if SANITIZER_INTERCEPT_PREADV64
INTERCEPTOR(SSIZE_T, preadv64, int fd, __sanitizer_iovec *iov, int iovcnt,
            OFF64_T offset) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, preadv64, fd, iov, iovcnt, offset);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  SSIZE_T res = REAL(preadv64)(fd, iov, iovcnt, offset);
  if (res > 0) write_iovec(ctx, iov, iovcnt, res);
  if (res >= 0 && fd >= 0) COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
  return res;
}
#define INIT_PREADV64 COMMON_INTERCEPT_FUNCTION(preadv64)
#else
#define INIT_PREADV64
#endif

#if SANITIZER_INTERCEPT_WRITE
INTERCEPTOR(SSIZE_T, write, int fd, void *ptr, SIZE_T count) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, write, fd, ptr, count);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  if (fd >= 0) COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd);
  SSIZE_T res = REAL(write)(fd, ptr, count);
  // FIXME: this check should be _before_ the call to REAL(write), not after
  if (res > 0) COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, res);
  return res;
}
#define INIT_WRITE COMMON_INTERCEPT_FUNCTION(write)
#else
#define INIT_WRITE
#endif

#if SANITIZER_INTERCEPT_PWRITE
INTERCEPTOR(SSIZE_T, pwrite, int fd, void *ptr, SIZE_T count, OFF_T offset) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pwrite, fd, ptr, count, offset);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  if (fd >= 0) COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd);
  SSIZE_T res = REAL(pwrite)(fd, ptr, count, offset);
  if (res > 0) COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, res);
  return res;
}
#define INIT_PWRITE COMMON_INTERCEPT_FUNCTION(pwrite)
#else
#define INIT_PWRITE
#endif

#if SANITIZER_INTERCEPT_PWRITE64
INTERCEPTOR(SSIZE_T, pwrite64, int fd, void *ptr, OFF64_T count,
            OFF64_T offset) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pwrite64, fd, ptr, count, offset);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  if (fd >= 0) COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd);
  SSIZE_T res = REAL(pwrite64)(fd, ptr, count, offset);
  if (res > 0) COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, res);
  return res;
}
#define INIT_PWRITE64 COMMON_INTERCEPT_FUNCTION(pwrite64)
#else
#define INIT_PWRITE64
#endif

#if SANITIZER_INTERCEPT_WRITEV
INTERCEPTOR_WITH_SUFFIX(SSIZE_T, writev, int fd, __sanitizer_iovec *iov,
                        int iovcnt) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, writev, fd, iov, iovcnt);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  if (fd >= 0) COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd);
  SSIZE_T res = REAL(writev)(fd, iov, iovcnt);
  if (res > 0) read_iovec(ctx, iov, iovcnt, res);
  return res;
}
#define INIT_WRITEV COMMON_INTERCEPT_FUNCTION(writev)
#else
#define INIT_WRITEV
#endif

#if SANITIZER_INTERCEPT_PWRITEV
INTERCEPTOR(SSIZE_T, pwritev, int fd, __sanitizer_iovec *iov, int iovcnt,
            OFF_T offset) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pwritev, fd, iov, iovcnt, offset);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  if (fd >= 0) COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd);
  SSIZE_T res = REAL(pwritev)(fd, iov, iovcnt, offset);
  if (res > 0) read_iovec(ctx, iov, iovcnt, res);
  return res;
}
#define INIT_PWRITEV COMMON_INTERCEPT_FUNCTION(pwritev)
#else
#define INIT_PWRITEV
#endif

#if SANITIZER_INTERCEPT_PWRITEV64
INTERCEPTOR(SSIZE_T, pwritev64, int fd, __sanitizer_iovec *iov, int iovcnt,
            OFF64_T offset) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pwritev64, fd, iov, iovcnt, offset);
  COMMON_INTERCEPTOR_FD_ACCESS(ctx, fd);
  if (fd >= 0) COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd);
  SSIZE_T res = REAL(pwritev64)(fd, iov, iovcnt, offset);
  if (res > 0) read_iovec(ctx, iov, iovcnt, res);
  return res;
}
#define INIT_PWRITEV64 COMMON_INTERCEPT_FUNCTION(pwritev64)
#else
#define INIT_PWRITEV64
#endif

#if SANITIZER_INTERCEPT_PRCTL
INTERCEPTOR(int, prctl, int option, unsigned long arg2,
            unsigned long arg3,                        // NOLINT
            unsigned long arg4, unsigned long arg5) {  // NOLINT
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, prctl, option, arg2, arg3, arg4, arg5);
  static const int PR_SET_NAME = 15;
  int res = REAL(prctl(option, arg2, arg3, arg4, arg5));
  if (option == PR_SET_NAME) {
    char buff[16];
    internal_strncpy(buff, (char *)arg2, 15);
    buff[15] = 0;
    COMMON_INTERCEPTOR_SET_THREAD_NAME(ctx, buff);
  }
  return res;
}
#define INIT_PRCTL COMMON_INTERCEPT_FUNCTION(prctl)
#else
#define INIT_PRCTL
#endif  // SANITIZER_INTERCEPT_PRCTL

#if SANITIZER_INTERCEPT_TIME
INTERCEPTOR(unsigned long, time, unsigned long *t) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, time, t);
  unsigned long local_t;
  unsigned long res = REAL(time)(&local_t);
  if (t && res != (unsigned long)-1) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, t, sizeof(*t));
    *t = local_t;
  }
  return res;
}
#define INIT_TIME COMMON_INTERCEPT_FUNCTION(time);
#else
#define INIT_TIME
#endif  // SANITIZER_INTERCEPT_TIME

#if SANITIZER_INTERCEPT_LOCALTIME_AND_FRIENDS
static void unpoison_tm(void *ctx, __sanitizer_tm *tm) {
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, tm, sizeof(*tm));
  if (tm->tm_zone) {
    // Can not use COMMON_INTERCEPTOR_WRITE_RANGE here, because tm->tm_zone
    // can point to shared memory and tsan would report a data race.
    COMMON_INTERCEPTOR_INITIALIZE_RANGE(tm->tm_zone,
                                        REAL(strlen(tm->tm_zone)) + 1);
  }
}
INTERCEPTOR(__sanitizer_tm *, localtime, unsigned long *timep) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, localtime, timep);
  __sanitizer_tm *res = REAL(localtime)(timep);
  if (res) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
    unpoison_tm(ctx, res);
  }
  return res;
}
INTERCEPTOR(__sanitizer_tm *, localtime_r, unsigned long *timep, void *result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, localtime_r, timep, result);
  __sanitizer_tm *res = REAL(localtime_r)(timep, result);
  if (res) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
    unpoison_tm(ctx, res);
  }
  return res;
}
INTERCEPTOR(__sanitizer_tm *, gmtime, unsigned long *timep) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, gmtime, timep);
  __sanitizer_tm *res = REAL(gmtime)(timep);
  if (res) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
    unpoison_tm(ctx, res);
  }
  return res;
}
INTERCEPTOR(__sanitizer_tm *, gmtime_r, unsigned long *timep, void *result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, gmtime_r, timep, result);
  __sanitizer_tm *res = REAL(gmtime_r)(timep, result);
  if (res) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
    unpoison_tm(ctx, res);
  }
  return res;
}
INTERCEPTOR(char *, ctime, unsigned long *timep) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ctime, timep);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(ctime)(timep);
  if (res) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  }
  return res;
}
INTERCEPTOR(char *, ctime_r, unsigned long *timep, char *result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ctime_r, timep, result);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(ctime_r)(timep, result);
  if (res) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  }
  return res;
}
INTERCEPTOR(char *, asctime, __sanitizer_tm *tm) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, asctime, tm);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(asctime)(tm);
  if (res) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, tm, sizeof(*tm));
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  }
  return res;
}
INTERCEPTOR(char *, asctime_r, __sanitizer_tm *tm, char *result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, asctime_r, tm, result);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(asctime_r)(tm, result);
  if (res) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, tm, sizeof(*tm));
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  }
  return res;
}
INTERCEPTOR(long, mktime, __sanitizer_tm *tm) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, mktime, tm);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, &tm->tm_sec, sizeof(tm->tm_sec));
  COMMON_INTERCEPTOR_READ_RANGE(ctx, &tm->tm_min, sizeof(tm->tm_min));
  COMMON_INTERCEPTOR_READ_RANGE(ctx, &tm->tm_hour, sizeof(tm->tm_hour));
  COMMON_INTERCEPTOR_READ_RANGE(ctx, &tm->tm_mday, sizeof(tm->tm_mday));
  COMMON_INTERCEPTOR_READ_RANGE(ctx, &tm->tm_mon, sizeof(tm->tm_mon));
  COMMON_INTERCEPTOR_READ_RANGE(ctx, &tm->tm_year, sizeof(tm->tm_year));
  COMMON_INTERCEPTOR_READ_RANGE(ctx, &tm->tm_isdst, sizeof(tm->tm_isdst));
  long res = REAL(mktime)(tm);
  if (res != -1) unpoison_tm(ctx, tm);
  return res;
}
#define INIT_LOCALTIME_AND_FRIENDS        \
  COMMON_INTERCEPT_FUNCTION(localtime);   \
  COMMON_INTERCEPT_FUNCTION(localtime_r); \
  COMMON_INTERCEPT_FUNCTION(gmtime);      \
  COMMON_INTERCEPT_FUNCTION(gmtime_r);    \
  COMMON_INTERCEPT_FUNCTION(ctime);       \
  COMMON_INTERCEPT_FUNCTION(ctime_r);     \
  COMMON_INTERCEPT_FUNCTION(asctime);     \
  COMMON_INTERCEPT_FUNCTION(asctime_r);   \
  COMMON_INTERCEPT_FUNCTION(mktime);
#else
#define INIT_LOCALTIME_AND_FRIENDS
#endif  // SANITIZER_INTERCEPT_LOCALTIME_AND_FRIENDS

#if SANITIZER_INTERCEPT_STRPTIME
INTERCEPTOR(char *, strptime, char *s, char *format, __sanitizer_tm *tm) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strptime, s, format, tm);
  if (format)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, format, REAL(strlen)(format) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(strptime)(s, format, tm);
  COMMON_INTERCEPTOR_READ_STRING(ctx, s, res ? res - s : 0);
  if (res && tm) {
    // Do not call unpoison_tm here, because strptime does not, in fact,
    // initialize the entire struct tm. For example, tm_zone pointer is left
    // uninitialized.
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, tm, sizeof(*tm));
  }
  return res;
}
#define INIT_STRPTIME COMMON_INTERCEPT_FUNCTION(strptime);
#else
#define INIT_STRPTIME
#endif

#if SANITIZER_INTERCEPT_SCANF || SANITIZER_INTERCEPT_PRINTF
#include "sanitizer_common_interceptors_format.inc"

#define FORMAT_INTERCEPTOR_IMPL(name, vname, ...)                              \
  {                                                                            \
    void *ctx;                                                                 \
    va_list ap;                                                                \
    va_start(ap, format);                                                      \
    COMMON_INTERCEPTOR_ENTER(ctx, vname, __VA_ARGS__, ap);                     \
    int res = WRAP(vname)(__VA_ARGS__, ap);                                    \
    va_end(ap);                                                                \
    return res;                                                                \
  }

#endif

#if SANITIZER_INTERCEPT_SCANF

#define VSCANF_INTERCEPTOR_IMPL(vname, allowGnuMalloc, ...)                    \
  {                                                                            \
    void *ctx;                                                                 \
    COMMON_INTERCEPTOR_ENTER(ctx, vname, __VA_ARGS__);                         \
    va_list aq;                                                                \
    va_copy(aq, ap);                                                           \
    int res = REAL(vname)(__VA_ARGS__);                                        \
    if (res > 0)                                                               \
      scanf_common(ctx, res, allowGnuMalloc, format, aq);                      \
    va_end(aq);                                                                \
    return res;                                                                \
  }

INTERCEPTOR(int, vscanf, const char *format, va_list ap)
VSCANF_INTERCEPTOR_IMPL(vscanf, true, format, ap)

INTERCEPTOR(int, vsscanf, const char *str, const char *format, va_list ap)
VSCANF_INTERCEPTOR_IMPL(vsscanf, true, str, format, ap)

INTERCEPTOR(int, vfscanf, void *stream, const char *format, va_list ap)
VSCANF_INTERCEPTOR_IMPL(vfscanf, true, stream, format, ap)

#if SANITIZER_INTERCEPT_ISOC99_SCANF
INTERCEPTOR(int, __isoc99_vscanf, const char *format, va_list ap)
VSCANF_INTERCEPTOR_IMPL(__isoc99_vscanf, false, format, ap)

INTERCEPTOR(int, __isoc99_vsscanf, const char *str, const char *format,
            va_list ap)
VSCANF_INTERCEPTOR_IMPL(__isoc99_vsscanf, false, str, format, ap)

INTERCEPTOR(int, __isoc99_vfscanf, void *stream, const char *format, va_list ap)
VSCANF_INTERCEPTOR_IMPL(__isoc99_vfscanf, false, stream, format, ap)
#endif  // SANITIZER_INTERCEPT_ISOC99_SCANF

INTERCEPTOR(int, scanf, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(scanf, vscanf, format)

INTERCEPTOR(int, fscanf, void *stream, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(fscanf, vfscanf, stream, format)

INTERCEPTOR(int, sscanf, const char *str, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(sscanf, vsscanf, str, format)

#if SANITIZER_INTERCEPT_ISOC99_SCANF
INTERCEPTOR(int, __isoc99_scanf, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(__isoc99_scanf, __isoc99_vscanf, format)

INTERCEPTOR(int, __isoc99_fscanf, void *stream, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(__isoc99_fscanf, __isoc99_vfscanf, stream, format)

INTERCEPTOR(int, __isoc99_sscanf, const char *str, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(__isoc99_sscanf, __isoc99_vsscanf, str, format)
#endif

#endif

#if SANITIZER_INTERCEPT_SCANF
#define INIT_SCANF                    \
  COMMON_INTERCEPT_FUNCTION(scanf);   \
  COMMON_INTERCEPT_FUNCTION(sscanf);  \
  COMMON_INTERCEPT_FUNCTION(fscanf);  \
  COMMON_INTERCEPT_FUNCTION(vscanf);  \
  COMMON_INTERCEPT_FUNCTION(vsscanf); \
  COMMON_INTERCEPT_FUNCTION(vfscanf);
#else
#define INIT_SCANF
#endif

#if SANITIZER_INTERCEPT_ISOC99_SCANF
#define INIT_ISOC99_SCANF                      \
  COMMON_INTERCEPT_FUNCTION(__isoc99_scanf);   \
  COMMON_INTERCEPT_FUNCTION(__isoc99_sscanf);  \
  COMMON_INTERCEPT_FUNCTION(__isoc99_fscanf);  \
  COMMON_INTERCEPT_FUNCTION(__isoc99_vscanf);  \
  COMMON_INTERCEPT_FUNCTION(__isoc99_vsscanf); \
  COMMON_INTERCEPT_FUNCTION(__isoc99_vfscanf);
#else
#define INIT_ISOC99_SCANF
#endif

#if SANITIZER_INTERCEPT_PRINTF

#define VPRINTF_INTERCEPTOR_ENTER(vname, ...)                                  \
  void *ctx;                                                                   \
  COMMON_INTERCEPTOR_ENTER(ctx, vname, __VA_ARGS__);                           \
  va_list aq;                                                                  \
  va_copy(aq, ap);

#define VPRINTF_INTERCEPTOR_RETURN()                                           \
  va_end(aq);

#define VPRINTF_INTERCEPTOR_IMPL(vname, ...)                                   \
  {                                                                            \
    VPRINTF_INTERCEPTOR_ENTER(vname, __VA_ARGS__);                             \
    if (common_flags()->check_printf)                                          \
      printf_common(ctx, format, aq);                                          \
    int res = REAL(vname)(__VA_ARGS__);                                        \
    VPRINTF_INTERCEPTOR_RETURN();                                              \
    return res;                                                                \
  }

// FIXME: under ASan the REAL() call below may write to freed memory and
// corrupt its metadata. See
// https://code.google.com/p/address-sanitizer/issues/detail?id=321.
#define VSPRINTF_INTERCEPTOR_IMPL(vname, str, ...)                             \
  {                                                                            \
    VPRINTF_INTERCEPTOR_ENTER(vname, str, __VA_ARGS__)                         \
    if (common_flags()->check_printf) {                                        \
      printf_common(ctx, format, aq);                                          \
    }                                                                          \
    int res = REAL(vname)(str, __VA_ARGS__);                                   \
    if (res >= 0) {                                                            \
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, str, res + 1);                       \
    }                                                                          \
    VPRINTF_INTERCEPTOR_RETURN();                                              \
    return res;                                                                \
  }

// FIXME: under ASan the REAL() call below may write to freed memory and
// corrupt its metadata. See
// https://code.google.com/p/address-sanitizer/issues/detail?id=321.
#define VSNPRINTF_INTERCEPTOR_IMPL(vname, str, size, ...)                      \
  {                                                                            \
    VPRINTF_INTERCEPTOR_ENTER(vname, str, size, __VA_ARGS__)                   \
    if (common_flags()->check_printf) {                                        \
      printf_common(ctx, format, aq);                                          \
    }                                                                          \
    int res = REAL(vname)(str, size, __VA_ARGS__);                             \
    if (res >= 0) {                                                            \
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, str, Min(size, (SIZE_T)(res + 1)));  \
    }                                                                          \
    VPRINTF_INTERCEPTOR_RETURN();                                              \
    return res;                                                                \
  }

// FIXME: under ASan the REAL() call below may write to freed memory and
// corrupt its metadata. See
// https://code.google.com/p/address-sanitizer/issues/detail?id=321.
#define VASPRINTF_INTERCEPTOR_IMPL(vname, strp, ...)                           \
  {                                                                            \
    VPRINTF_INTERCEPTOR_ENTER(vname, strp, __VA_ARGS__)                        \
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, strp, sizeof(char *));                 \
    if (common_flags()->check_printf) {                                        \
      printf_common(ctx, format, aq);                                          \
    }                                                                          \
    int res = REAL(vname)(strp, __VA_ARGS__);                                  \
    if (res >= 0) {                                                            \
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *strp, res + 1);                     \
    }                                                                          \
    VPRINTF_INTERCEPTOR_RETURN();                                              \
    return res;                                                                \
  }

INTERCEPTOR(int, vprintf, const char *format, va_list ap)
VPRINTF_INTERCEPTOR_IMPL(vprintf, format, ap)

INTERCEPTOR(int, vfprintf, __sanitizer_FILE *stream, const char *format,
            va_list ap)
VPRINTF_INTERCEPTOR_IMPL(vfprintf, stream, format, ap)

INTERCEPTOR(int, vsnprintf, char *str, SIZE_T size, const char *format,
            va_list ap)
VSNPRINTF_INTERCEPTOR_IMPL(vsnprintf, str, size, format, ap)

#if SANITIZER_INTERCEPT_PRINTF_L
INTERCEPTOR(int, vsnprintf_l, char *str, SIZE_T size, void *loc,
            const char *format, va_list ap)
VSNPRINTF_INTERCEPTOR_IMPL(vsnprintf_l, str, size, loc, format, ap)

INTERCEPTOR(int, snprintf_l, char *str, SIZE_T size, void *loc,
            const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(snprintf_l, vsnprintf_l, str, size, loc, format)
#endif  // SANITIZER_INTERCEPT_PRINTF_L

INTERCEPTOR(int, vsprintf, char *str, const char *format, va_list ap)
VSPRINTF_INTERCEPTOR_IMPL(vsprintf, str, format, ap)

INTERCEPTOR(int, vasprintf, char **strp, const char *format, va_list ap)
VASPRINTF_INTERCEPTOR_IMPL(vasprintf, strp, format, ap)

#if SANITIZER_INTERCEPT_ISOC99_PRINTF
INTERCEPTOR(int, __isoc99_vprintf, const char *format, va_list ap)
VPRINTF_INTERCEPTOR_IMPL(__isoc99_vprintf, format, ap)

INTERCEPTOR(int, __isoc99_vfprintf, __sanitizer_FILE *stream,
            const char *format, va_list ap)
VPRINTF_INTERCEPTOR_IMPL(__isoc99_vfprintf, stream, format, ap)

INTERCEPTOR(int, __isoc99_vsnprintf, char *str, SIZE_T size, const char *format,
            va_list ap)
VSNPRINTF_INTERCEPTOR_IMPL(__isoc99_vsnprintf, str, size, format, ap)

INTERCEPTOR(int, __isoc99_vsprintf, char *str, const char *format,
            va_list ap)
VSPRINTF_INTERCEPTOR_IMPL(__isoc99_vsprintf, str, format,
                          ap)

#endif  // SANITIZER_INTERCEPT_ISOC99_PRINTF

INTERCEPTOR(int, printf, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(printf, vprintf, format)

INTERCEPTOR(int, fprintf, __sanitizer_FILE *stream, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(fprintf, vfprintf, stream, format)

INTERCEPTOR(int, sprintf, char *str, const char *format, ...) // NOLINT
FORMAT_INTERCEPTOR_IMPL(sprintf, vsprintf, str, format) // NOLINT

INTERCEPTOR(int, snprintf, char *str, SIZE_T size, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(snprintf, vsnprintf, str, size, format)

INTERCEPTOR(int, asprintf, char **strp, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(asprintf, vasprintf, strp, format)

#if SANITIZER_INTERCEPT_ISOC99_PRINTF
INTERCEPTOR(int, __isoc99_printf, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(__isoc99_printf, __isoc99_vprintf, format)

INTERCEPTOR(int, __isoc99_fprintf, __sanitizer_FILE *stream, const char *format,
            ...)
FORMAT_INTERCEPTOR_IMPL(__isoc99_fprintf, __isoc99_vfprintf, stream, format)

INTERCEPTOR(int, __isoc99_sprintf, char *str, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(__isoc99_sprintf, __isoc99_vsprintf, str, format)

INTERCEPTOR(int, __isoc99_snprintf, char *str, SIZE_T size,
            const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(__isoc99_snprintf, __isoc99_vsnprintf, str, size,
                        format)

#endif  // SANITIZER_INTERCEPT_ISOC99_PRINTF

#endif  // SANITIZER_INTERCEPT_PRINTF

#if SANITIZER_INTERCEPT_PRINTF
#define INIT_PRINTF                     \
  COMMON_INTERCEPT_FUNCTION(printf);    \
  COMMON_INTERCEPT_FUNCTION(sprintf);   \
  COMMON_INTERCEPT_FUNCTION(snprintf);  \
  COMMON_INTERCEPT_FUNCTION(asprintf);  \
  COMMON_INTERCEPT_FUNCTION(fprintf);   \
  COMMON_INTERCEPT_FUNCTION(vprintf);   \
  COMMON_INTERCEPT_FUNCTION(vsprintf);  \
  COMMON_INTERCEPT_FUNCTION(vsnprintf); \
  COMMON_INTERCEPT_FUNCTION(vasprintf); \
  COMMON_INTERCEPT_FUNCTION(vfprintf);
#else
#define INIT_PRINTF
#endif

#if SANITIZER_INTERCEPT_PRINTF_L
#define INIT_PRINTF_L                     \
  COMMON_INTERCEPT_FUNCTION(snprintf_l);  \
  COMMON_INTERCEPT_FUNCTION(vsnprintf_l);
#else
#define INIT_PRINTF_L
#endif

#if SANITIZER_INTERCEPT_ISOC99_PRINTF
#define INIT_ISOC99_PRINTF                       \
  COMMON_INTERCEPT_FUNCTION(__isoc99_printf);    \
  COMMON_INTERCEPT_FUNCTION(__isoc99_sprintf);   \
  COMMON_INTERCEPT_FUNCTION(__isoc99_snprintf);  \
  COMMON_INTERCEPT_FUNCTION(__isoc99_fprintf);   \
  COMMON_INTERCEPT_FUNCTION(__isoc99_vprintf);   \
  COMMON_INTERCEPT_FUNCTION(__isoc99_vsprintf);  \
  COMMON_INTERCEPT_FUNCTION(__isoc99_vsnprintf); \
  COMMON_INTERCEPT_FUNCTION(__isoc99_vfprintf);
#else
#define INIT_ISOC99_PRINTF
#endif

#if SANITIZER_INTERCEPT_IOCTL
#include "sanitizer_common_interceptors_ioctl.inc"
INTERCEPTOR(int, ioctl, int d, unsigned long request, ...) {
  // We need a frame pointer, because we call into ioctl_common_[pre|post] which
  // can trigger a report and we need to be able to unwind through this
  // function.  On Mac in debug mode we might not have a frame pointer, because
  // ioctl_common_[pre|post] doesn't get inlined here.
  ENABLE_FRAME_POINTER;

  void *ctx;
  va_list ap;
  va_start(ap, request);
  void *arg = va_arg(ap, void *);
  va_end(ap);
  COMMON_INTERCEPTOR_ENTER(ctx, ioctl, d, request, arg);

  CHECK(ioctl_initialized);

  // Note: TSan does not use common flags, and they are zero-initialized.
  // This effectively disables ioctl handling in TSan.
  if (!common_flags()->handle_ioctl) return REAL(ioctl)(d, request, arg);

  // Although request is unsigned long, the rest of the interceptor uses it
  // as just "unsigned" to save space, because we know that all values fit in
  // "unsigned" - they are compile-time constants.

  const ioctl_desc *desc = ioctl_lookup(request);
  ioctl_desc decoded_desc;
  if (!desc) {
    VPrintf(2, "Decoding unknown ioctl 0x%x\n", request);
    if (!ioctl_decode(request, &decoded_desc))
      Printf("WARNING: failed decoding unknown ioctl 0x%x\n", request);
    else
      desc = &decoded_desc;
  }

  if (desc) ioctl_common_pre(ctx, desc, d, request, arg);
  int res = REAL(ioctl)(d, request, arg);
  // FIXME: some ioctls have different return values for success and failure.
  if (desc && res != -1) ioctl_common_post(ctx, desc, res, d, request, arg);
  return res;
}
#define INIT_IOCTL \
  ioctl_init();    \
  COMMON_INTERCEPT_FUNCTION(ioctl);
#else
#define INIT_IOCTL
#endif

#if SANITIZER_INTERCEPT_GETPWNAM_AND_FRIENDS || \
    SANITIZER_INTERCEPT_GETPWENT || SANITIZER_INTERCEPT_FGETPWENT || \
    SANITIZER_INTERCEPT_GETPWENT_R || SANITIZER_INTERCEPT_GETPWNAM_R_AND_FRIENDS
static void unpoison_passwd(void *ctx, __sanitizer_passwd *pwd) {
  if (pwd) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd, sizeof(*pwd));
    if (pwd->pw_name)
      COMMON_INTERCEPTOR_INITIALIZE_RANGE(pwd->pw_name,
                                          REAL(strlen)(pwd->pw_name) + 1);
    if (pwd->pw_passwd)
      COMMON_INTERCEPTOR_INITIALIZE_RANGE(pwd->pw_passwd,
                                          REAL(strlen)(pwd->pw_passwd) + 1);
#if !SANITIZER_ANDROID
    if (pwd->pw_gecos)
      COMMON_INTERCEPTOR_INITIALIZE_RANGE(pwd->pw_gecos,
                                          REAL(strlen)(pwd->pw_gecos) + 1);
#endif
#if SANITIZER_MAC
    if (pwd->pw_class)
      COMMON_INTERCEPTOR_INITIALIZE_RANGE(pwd->pw_class,
                                          REAL(strlen)(pwd->pw_class) + 1);
#endif
    if (pwd->pw_dir)
      COMMON_INTERCEPTOR_INITIALIZE_RANGE(pwd->pw_dir,
                                          REAL(strlen)(pwd->pw_dir) + 1);
    if (pwd->pw_shell)
      COMMON_INTERCEPTOR_INITIALIZE_RANGE(pwd->pw_shell,
                                          REAL(strlen)(pwd->pw_shell) + 1);
  }
}

static void unpoison_group(void *ctx, __sanitizer_group *grp) {
  if (grp) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, grp, sizeof(*grp));
    if (grp->gr_name)
      COMMON_INTERCEPTOR_INITIALIZE_RANGE(grp->gr_name,
                                          REAL(strlen)(grp->gr_name) + 1);
    if (grp->gr_passwd)
      COMMON_INTERCEPTOR_INITIALIZE_RANGE(grp->gr_passwd,
                                          REAL(strlen)(grp->gr_passwd) + 1);
    char **p = grp->gr_mem;
    for (; *p; ++p) {
      COMMON_INTERCEPTOR_INITIALIZE_RANGE(*p, REAL(strlen)(*p) + 1);
    }
    COMMON_INTERCEPTOR_INITIALIZE_RANGE(grp->gr_mem,
                                        (p - grp->gr_mem + 1) * sizeof(*p));
  }
}
#endif  // SANITIZER_INTERCEPT_GETPWNAM_AND_FRIENDS ||
        // SANITIZER_INTERCEPT_GETPWENT || SANITIZER_INTERCEPT_FGETPWENT ||
        // SANITIZER_INTERCEPT_GETPWENT_R ||
        // SANITIZER_INTERCEPT_GETPWNAM_R_AND_FRIENDS

#if SANITIZER_INTERCEPT_GETPWNAM_AND_FRIENDS
INTERCEPTOR(__sanitizer_passwd *, getpwnam, const char *name) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getpwnam, name);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
  __sanitizer_passwd *res = REAL(getpwnam)(name);
  if (res) unpoison_passwd(ctx, res);
  return res;
}
INTERCEPTOR(__sanitizer_passwd *, getpwuid, u32 uid) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getpwuid, uid);
  __sanitizer_passwd *res = REAL(getpwuid)(uid);
  if (res) unpoison_passwd(ctx, res);
  return res;
}
INTERCEPTOR(__sanitizer_group *, getgrnam, const char *name) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getgrnam, name);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
  __sanitizer_group *res = REAL(getgrnam)(name);
  if (res) unpoison_group(ctx, res);
  return res;
}
INTERCEPTOR(__sanitizer_group *, getgrgid, u32 gid) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getgrgid, gid);
  __sanitizer_group *res = REAL(getgrgid)(gid);
  if (res) unpoison_group(ctx, res);
  return res;
}
#define INIT_GETPWNAM_AND_FRIENDS      \
  COMMON_INTERCEPT_FUNCTION(getpwnam); \
  COMMON_INTERCEPT_FUNCTION(getpwuid); \
  COMMON_INTERCEPT_FUNCTION(getgrnam); \
  COMMON_INTERCEPT_FUNCTION(getgrgid);
#else
#define INIT_GETPWNAM_AND_FRIENDS
#endif

#if SANITIZER_INTERCEPT_GETPWNAM_R_AND_FRIENDS
INTERCEPTOR(int, getpwnam_r, const char *name, __sanitizer_passwd *pwd,
            char *buf, SIZE_T buflen, __sanitizer_passwd **result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getpwnam_r, name, pwd, buf, buflen, result);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getpwnam_r)(name, pwd, buf, buflen, result);
  if (!res) {
    if (result && *result) unpoison_passwd(ctx, *result);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, buflen);
  }
  if (result) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
  return res;
}
INTERCEPTOR(int, getpwuid_r, u32 uid, __sanitizer_passwd *pwd, char *buf,
            SIZE_T buflen, __sanitizer_passwd **result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getpwuid_r, uid, pwd, buf, buflen, result);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getpwuid_r)(uid, pwd, buf, buflen, result);
  if (!res) {
    if (result && *result) unpoison_passwd(ctx, *result);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, buflen);
  }
  if (result) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
  return res;
}
INTERCEPTOR(int, getgrnam_r, const char *name, __sanitizer_group *grp,
            char *buf, SIZE_T buflen, __sanitizer_group **result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getgrnam_r, name, grp, buf, buflen, result);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getgrnam_r)(name, grp, buf, buflen, result);
  if (!res) {
    if (result && *result) unpoison_group(ctx, *result);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, buflen);
  }
  if (result) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
  return res;
}
INTERCEPTOR(int, getgrgid_r, u32 gid, __sanitizer_group *grp, char *buf,
            SIZE_T buflen, __sanitizer_group **result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getgrgid_r, gid, grp, buf, buflen, result);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getgrgid_r)(gid, grp, buf, buflen, result);
  if (!res) {
    if (result && *result) unpoison_group(ctx, *result);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, buflen);
  }
  if (result) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
  return res;
}
#define INIT_GETPWNAM_R_AND_FRIENDS      \
  COMMON_INTERCEPT_FUNCTION(getpwnam_r); \
  COMMON_INTERCEPT_FUNCTION(getpwuid_r); \
  COMMON_INTERCEPT_FUNCTION(getgrnam_r); \
  COMMON_INTERCEPT_FUNCTION(getgrgid_r);
#else
#define INIT_GETPWNAM_R_AND_FRIENDS
#endif

#if SANITIZER_INTERCEPT_GETPWENT
INTERCEPTOR(__sanitizer_passwd *, getpwent, int dummy) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getpwent, dummy);
  __sanitizer_passwd *res = REAL(getpwent)(dummy);
  if (res) unpoison_passwd(ctx, res);
  return res;
}
INTERCEPTOR(__sanitizer_group *, getgrent, int dummy) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getgrent, dummy);
  __sanitizer_group *res = REAL(getgrent)(dummy);
  if (res) unpoison_group(ctx, res);;
  return res;
}
#define INIT_GETPWENT                  \
  COMMON_INTERCEPT_FUNCTION(getpwent); \
  COMMON_INTERCEPT_FUNCTION(getgrent);
#else
#define INIT_GETPWENT
#endif

#if SANITIZER_INTERCEPT_FGETPWENT
INTERCEPTOR(__sanitizer_passwd *, fgetpwent, void *fp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fgetpwent, fp);
  __sanitizer_passwd *res = REAL(fgetpwent)(fp);
  if (res) unpoison_passwd(ctx, res);
  return res;
}
INTERCEPTOR(__sanitizer_group *, fgetgrent, void *fp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fgetgrent, fp);
  __sanitizer_group *res = REAL(fgetgrent)(fp);
  if (res) unpoison_group(ctx, res);
  return res;
}
#define INIT_FGETPWENT                  \
  COMMON_INTERCEPT_FUNCTION(fgetpwent); \
  COMMON_INTERCEPT_FUNCTION(fgetgrent);
#else
#define INIT_FGETPWENT
#endif

#if SANITIZER_INTERCEPT_GETPWENT_R
INTERCEPTOR(int, getpwent_r, __sanitizer_passwd *pwbuf, char *buf,
            SIZE_T buflen, __sanitizer_passwd **pwbufp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getpwent_r, pwbuf, buf, buflen, pwbufp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getpwent_r)(pwbuf, buf, buflen, pwbufp);
  if (!res) {
    if (pwbufp && *pwbufp) unpoison_passwd(ctx, *pwbufp);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, buflen);
  }
  if (pwbufp) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwbufp, sizeof(*pwbufp));
  return res;
}
INTERCEPTOR(int, fgetpwent_r, void *fp, __sanitizer_passwd *pwbuf, char *buf,
            SIZE_T buflen, __sanitizer_passwd **pwbufp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fgetpwent_r, fp, pwbuf, buf, buflen, pwbufp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(fgetpwent_r)(fp, pwbuf, buf, buflen, pwbufp);
  if (!res) {
    if (pwbufp && *pwbufp) unpoison_passwd(ctx, *pwbufp);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, buflen);
  }
  if (pwbufp) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwbufp, sizeof(*pwbufp));
  return res;
}
INTERCEPTOR(int, getgrent_r, __sanitizer_group *pwbuf, char *buf, SIZE_T buflen,
            __sanitizer_group **pwbufp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getgrent_r, pwbuf, buf, buflen, pwbufp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getgrent_r)(pwbuf, buf, buflen, pwbufp);
  if (!res) {
    if (pwbufp && *pwbufp) unpoison_group(ctx, *pwbufp);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, buflen);
  }
  if (pwbufp) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwbufp, sizeof(*pwbufp));
  return res;
}
INTERCEPTOR(int, fgetgrent_r, void *fp, __sanitizer_group *pwbuf, char *buf,
            SIZE_T buflen, __sanitizer_group **pwbufp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fgetgrent_r, fp, pwbuf, buf, buflen, pwbufp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(fgetgrent_r)(fp, pwbuf, buf, buflen, pwbufp);
  if (!res) {
    if (pwbufp && *pwbufp) unpoison_group(ctx, *pwbufp);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, buflen);
  }
  if (pwbufp) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwbufp, sizeof(*pwbufp));
  return res;
}
#define INIT_GETPWENT_R                   \
  COMMON_INTERCEPT_FUNCTION(getpwent_r);  \
  COMMON_INTERCEPT_FUNCTION(fgetpwent_r); \
  COMMON_INTERCEPT_FUNCTION(getgrent_r);  \
  COMMON_INTERCEPT_FUNCTION(fgetgrent_r);
#else
#define INIT_GETPWENT_R
#endif

#if SANITIZER_INTERCEPT_SETPWENT
// The only thing these interceptors do is disable any nested interceptors.
// These functions may open nss modules and call uninstrumented functions from
// them, and we don't want things like strlen() to trigger.
INTERCEPTOR(void, setpwent, int dummy) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, setpwent, dummy);
  REAL(setpwent)(dummy);
}
INTERCEPTOR(void, endpwent, int dummy) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, endpwent, dummy);
  REAL(endpwent)(dummy);
}
INTERCEPTOR(void, setgrent, int dummy) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, setgrent, dummy);
  REAL(setgrent)(dummy);
}
INTERCEPTOR(void, endgrent, int dummy) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, endgrent, dummy);
  REAL(endgrent)(dummy);
}
#define INIT_SETPWENT                  \
  COMMON_INTERCEPT_FUNCTION(setpwent); \
  COMMON_INTERCEPT_FUNCTION(endpwent); \
  COMMON_INTERCEPT_FUNCTION(setgrent); \
  COMMON_INTERCEPT_FUNCTION(endgrent);
#else
#define INIT_SETPWENT
#endif

#if SANITIZER_INTERCEPT_CLOCK_GETTIME
INTERCEPTOR(int, clock_getres, u32 clk_id, void *tp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, clock_getres, clk_id, tp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(clock_getres)(clk_id, tp);
  if (!res && tp) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, tp, struct_timespec_sz);
  }
  return res;
}
INTERCEPTOR(int, clock_gettime, u32 clk_id, void *tp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, clock_gettime, clk_id, tp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(clock_gettime)(clk_id, tp);
  if (!res) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, tp, struct_timespec_sz);
  }
  return res;
}
INTERCEPTOR(int, clock_settime, u32 clk_id, const void *tp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, clock_settime, clk_id, tp);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, tp, struct_timespec_sz);
  return REAL(clock_settime)(clk_id, tp);
}
#define INIT_CLOCK_GETTIME                  \
  COMMON_INTERCEPT_FUNCTION(clock_getres);  \
  COMMON_INTERCEPT_FUNCTION(clock_gettime); \
  COMMON_INTERCEPT_FUNCTION(clock_settime);
#else
#define INIT_CLOCK_GETTIME
#endif

#if SANITIZER_INTERCEPT_GETITIMER
INTERCEPTOR(int, getitimer, int which, void *curr_value) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getitimer, which, curr_value);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getitimer)(which, curr_value);
  if (!res && curr_value) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, curr_value, struct_itimerval_sz);
  }
  return res;
}
INTERCEPTOR(int, setitimer, int which, const void *new_value, void *old_value) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, setitimer, which, new_value, old_value);
  if (new_value)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, new_value, struct_itimerval_sz);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(setitimer)(which, new_value, old_value);
  if (!res && old_value) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, old_value, struct_itimerval_sz);
  }
  return res;
}
#define INIT_GETITIMER                  \
  COMMON_INTERCEPT_FUNCTION(getitimer); \
  COMMON_INTERCEPT_FUNCTION(setitimer);
#else
#define INIT_GETITIMER
#endif

#if SANITIZER_INTERCEPT_GLOB
static void unpoison_glob_t(void *ctx, __sanitizer_glob_t *pglob) {
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pglob, sizeof(*pglob));
  // +1 for NULL pointer at the end.
  if (pglob->gl_pathv)
    COMMON_INTERCEPTOR_WRITE_RANGE(
        ctx, pglob->gl_pathv, (pglob->gl_pathc + 1) * sizeof(*pglob->gl_pathv));
  for (SIZE_T i = 0; i < pglob->gl_pathc; ++i) {
    char *p = pglob->gl_pathv[i];
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, REAL(strlen)(p) + 1);
  }
}

static THREADLOCAL __sanitizer_glob_t *pglob_copy;

static void wrapped_gl_closedir(void *dir) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(1);
  pglob_copy->gl_closedir(dir);
}

static void *wrapped_gl_readdir(void *dir) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(1);
  return pglob_copy->gl_readdir(dir);
}

static void *wrapped_gl_opendir(const char *s) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(1);
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, REAL(strlen)(s) + 1);
  return pglob_copy->gl_opendir(s);
}

static int wrapped_gl_lstat(const char *s, void *st) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(2);
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, REAL(strlen)(s) + 1);
  return pglob_copy->gl_lstat(s, st);
}

static int wrapped_gl_stat(const char *s, void *st) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(2);
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(s, REAL(strlen)(s) + 1);
  return pglob_copy->gl_stat(s, st);
}

INTERCEPTOR(int, glob, const char *pattern, int flags,
            int (*errfunc)(const char *epath, int eerrno),
            __sanitizer_glob_t *pglob) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, glob, pattern, flags, errfunc, pglob);
  COMMON_INTERCEPTOR_READ_STRING(ctx, pattern, 0);
  __sanitizer_glob_t glob_copy = {
      0,                  0,                   0,
      0,                  wrapped_gl_closedir, wrapped_gl_readdir,
      wrapped_gl_opendir, wrapped_gl_lstat,    wrapped_gl_stat};
  if (flags & glob_altdirfunc) {
    Swap(pglob->gl_closedir, glob_copy.gl_closedir);
    Swap(pglob->gl_readdir, glob_copy.gl_readdir);
    Swap(pglob->gl_opendir, glob_copy.gl_opendir);
    Swap(pglob->gl_lstat, glob_copy.gl_lstat);
    Swap(pglob->gl_stat, glob_copy.gl_stat);
    pglob_copy = &glob_copy;
  }
  int res = REAL(glob)(pattern, flags, errfunc, pglob);
  if (flags & glob_altdirfunc) {
    Swap(pglob->gl_closedir, glob_copy.gl_closedir);
    Swap(pglob->gl_readdir, glob_copy.gl_readdir);
    Swap(pglob->gl_opendir, glob_copy.gl_opendir);
    Swap(pglob->gl_lstat, glob_copy.gl_lstat);
    Swap(pglob->gl_stat, glob_copy.gl_stat);
  }
  pglob_copy = 0;
  if ((!res || res == glob_nomatch) && pglob) unpoison_glob_t(ctx, pglob);
  return res;
}

INTERCEPTOR(int, glob64, const char *pattern, int flags,
            int (*errfunc)(const char *epath, int eerrno),
            __sanitizer_glob_t *pglob) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, glob64, pattern, flags, errfunc, pglob);
  COMMON_INTERCEPTOR_READ_STRING(ctx, pattern, 0);
  __sanitizer_glob_t glob_copy = {
      0,                  0,                   0,
      0,                  wrapped_gl_closedir, wrapped_gl_readdir,
      wrapped_gl_opendir, wrapped_gl_lstat,    wrapped_gl_stat};
  if (flags & glob_altdirfunc) {
    Swap(pglob->gl_closedir, glob_copy.gl_closedir);
    Swap(pglob->gl_readdir, glob_copy.gl_readdir);
    Swap(pglob->gl_opendir, glob_copy.gl_opendir);
    Swap(pglob->gl_lstat, glob_copy.gl_lstat);
    Swap(pglob->gl_stat, glob_copy.gl_stat);
    pglob_copy = &glob_copy;
  }
  int res = REAL(glob64)(pattern, flags, errfunc, pglob);
  if (flags & glob_altdirfunc) {
    Swap(pglob->gl_closedir, glob_copy.gl_closedir);
    Swap(pglob->gl_readdir, glob_copy.gl_readdir);
    Swap(pglob->gl_opendir, glob_copy.gl_opendir);
    Swap(pglob->gl_lstat, glob_copy.gl_lstat);
    Swap(pglob->gl_stat, glob_copy.gl_stat);
  }
  pglob_copy = 0;
  if ((!res || res == glob_nomatch) && pglob) unpoison_glob_t(ctx, pglob);
  return res;
}
#define INIT_GLOB                  \
  COMMON_INTERCEPT_FUNCTION(glob); \
  COMMON_INTERCEPT_FUNCTION(glob64);
#else  // SANITIZER_INTERCEPT_GLOB
#define INIT_GLOB
#endif  // SANITIZER_INTERCEPT_GLOB

#if SANITIZER_INTERCEPT_WAIT
// According to sys/wait.h, wait(), waitid(), waitpid() may have symbol version
// suffixes on Darwin. See the declaration of INTERCEPTOR_WITH_SUFFIX for
// details.
INTERCEPTOR_WITH_SUFFIX(int, wait, int *status) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, wait, status);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(wait)(status);
  if (res != -1 && status)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, status, sizeof(*status));
  return res;
}
// On FreeBSD id_t is always 64-bit wide.
#if SANITIZER_FREEBSD && (SANITIZER_WORDSIZE == 32)
INTERCEPTOR_WITH_SUFFIX(int, waitid, int idtype, long long id, void *infop,
                        int options) {
#else
INTERCEPTOR_WITH_SUFFIX(int, waitid, int idtype, int id, void *infop,
                        int options) {
#endif
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, waitid, idtype, id, infop, options);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(waitid)(idtype, id, infop, options);
  if (res != -1 && infop)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, infop, siginfo_t_sz);
  return res;
}
INTERCEPTOR_WITH_SUFFIX(int, waitpid, int pid, int *status, int options) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, waitpid, pid, status, options);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(waitpid)(pid, status, options);
  if (res != -1 && status)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, status, sizeof(*status));
  return res;
}
INTERCEPTOR(int, wait3, int *status, int options, void *rusage) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, wait3, status, options, rusage);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(wait3)(status, options, rusage);
  if (res != -1) {
    if (status) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, status, sizeof(*status));
    if (rusage) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, rusage, struct_rusage_sz);
  }
  return res;
}
#if SANITIZER_ANDROID
INTERCEPTOR(int, __wait4, int pid, int *status, int options, void *rusage) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, __wait4, pid, status, options, rusage);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(__wait4)(pid, status, options, rusage);
  if (res != -1) {
    if (status) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, status, sizeof(*status));
    if (rusage) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, rusage, struct_rusage_sz);
  }
  return res;
}
#define INIT_WAIT4 COMMON_INTERCEPT_FUNCTION(__wait4);
#else
INTERCEPTOR(int, wait4, int pid, int *status, int options, void *rusage) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, wait4, pid, status, options, rusage);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(wait4)(pid, status, options, rusage);
  if (res != -1) {
    if (status) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, status, sizeof(*status));
    if (rusage) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, rusage, struct_rusage_sz);
  }
  return res;
}
#define INIT_WAIT4 COMMON_INTERCEPT_FUNCTION(wait4);
#endif  // SANITIZER_ANDROID
#define INIT_WAIT                     \
  COMMON_INTERCEPT_FUNCTION(wait);    \
  COMMON_INTERCEPT_FUNCTION(waitid);  \
  COMMON_INTERCEPT_FUNCTION(waitpid); \
  COMMON_INTERCEPT_FUNCTION(wait3);
#else
#define INIT_WAIT
#define INIT_WAIT4
#endif

#if SANITIZER_INTERCEPT_INET
INTERCEPTOR(char *, inet_ntop, int af, const void *src, char *dst, u32 size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, inet_ntop, af, src, dst, size);
  uptr sz = __sanitizer_in_addr_sz(af);
  if (sz) COMMON_INTERCEPTOR_READ_RANGE(ctx, src, sz);
  // FIXME: figure out read size based on the address family.
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(inet_ntop)(af, src, dst, size);
  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  return res;
}
INTERCEPTOR(int, inet_pton, int af, const char *src, void *dst) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, inet_pton, af, src, dst);
  COMMON_INTERCEPTOR_READ_STRING(ctx, src, 0);
  // FIXME: figure out read size based on the address family.
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(inet_pton)(af, src, dst);
  if (res == 1) {
    uptr sz = __sanitizer_in_addr_sz(af);
    if (sz) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, sz);
  }
  return res;
}
#define INIT_INET                       \
  COMMON_INTERCEPT_FUNCTION(inet_ntop); \
  COMMON_INTERCEPT_FUNCTION(inet_pton);
#else
#define INIT_INET
#endif

#if SANITIZER_INTERCEPT_INET
INTERCEPTOR(int, inet_aton, const char *cp, void *dst) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, inet_aton, cp, dst);
  if (cp) COMMON_INTERCEPTOR_READ_RANGE(ctx, cp, REAL(strlen)(cp) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(inet_aton)(cp, dst);
  if (res != 0) {
    uptr sz = __sanitizer_in_addr_sz(af_inet);
    if (sz) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, sz);
  }
  return res;
}
#define INIT_INET_ATON COMMON_INTERCEPT_FUNCTION(inet_aton);
#else
#define INIT_INET_ATON
#endif

#if SANITIZER_INTERCEPT_PTHREAD_GETSCHEDPARAM
INTERCEPTOR(int, pthread_getschedparam, uptr thread, int *policy, int *param) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pthread_getschedparam, thread, policy, param);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(pthread_getschedparam)(thread, policy, param);
  if (res == 0) {
    if (policy) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, policy, sizeof(*policy));
    if (param) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, param, sizeof(*param));
  }
  return res;
}
#define INIT_PTHREAD_GETSCHEDPARAM \
  COMMON_INTERCEPT_FUNCTION(pthread_getschedparam);
#else
#define INIT_PTHREAD_GETSCHEDPARAM
#endif

#if SANITIZER_INTERCEPT_GETADDRINFO
INTERCEPTOR(int, getaddrinfo, char *node, char *service,
            struct __sanitizer_addrinfo *hints,
            struct __sanitizer_addrinfo **out) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getaddrinfo, node, service, hints, out);
  if (node) COMMON_INTERCEPTOR_READ_RANGE(ctx, node, REAL(strlen)(node) + 1);
  if (service)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, service, REAL(strlen)(service) + 1);
  if (hints)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, hints, sizeof(__sanitizer_addrinfo));
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getaddrinfo)(node, service, hints, out);
  if (res == 0 && out) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, out, sizeof(*out));
    struct __sanitizer_addrinfo *p = *out;
    while (p) {
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, sizeof(*p));
      if (p->ai_addr)
        COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->ai_addr, p->ai_addrlen);
      if (p->ai_canonname)
        COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->ai_canonname,
                                       REAL(strlen)(p->ai_canonname) + 1);
      p = p->ai_next;
    }
  }
  return res;
}
#define INIT_GETADDRINFO COMMON_INTERCEPT_FUNCTION(getaddrinfo);
#else
#define INIT_GETADDRINFO
#endif

#if SANITIZER_INTERCEPT_GETNAMEINFO
INTERCEPTOR(int, getnameinfo, void *sockaddr, unsigned salen, char *host,
            unsigned hostlen, char *serv, unsigned servlen, int flags) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getnameinfo, sockaddr, salen, host, hostlen,
                           serv, servlen, flags);
  // FIXME: consider adding READ_RANGE(sockaddr, salen)
  // There is padding in in_addr that may make this too noisy
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res =
      REAL(getnameinfo)(sockaddr, salen, host, hostlen, serv, servlen, flags);
  if (res == 0) {
    if (host && hostlen)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, host, REAL(strlen)(host) + 1);
    if (serv && servlen)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, serv, REAL(strlen)(serv) + 1);
  }
  return res;
}
#define INIT_GETNAMEINFO COMMON_INTERCEPT_FUNCTION(getnameinfo);
#else
#define INIT_GETNAMEINFO
#endif

#if SANITIZER_INTERCEPT_GETSOCKNAME
INTERCEPTOR(int, getsockname, int sock_fd, void *addr, int *addrlen) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getsockname, sock_fd, addr, addrlen);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, addrlen, sizeof(*addrlen));
  int addrlen_in = *addrlen;
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getsockname)(sock_fd, addr, addrlen);
  if (res == 0) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, addr, Min(addrlen_in, *addrlen));
  }
  return res;
}
#define INIT_GETSOCKNAME COMMON_INTERCEPT_FUNCTION(getsockname);
#else
#define INIT_GETSOCKNAME
#endif

#if SANITIZER_INTERCEPT_GETHOSTBYNAME || SANITIZER_INTERCEPT_GETHOSTBYNAME_R
static void write_hostent(void *ctx, struct __sanitizer_hostent *h) {
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, h, sizeof(__sanitizer_hostent));
  if (h->h_name)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, h->h_name, REAL(strlen)(h->h_name) + 1);
  char **p = h->h_aliases;
  while (*p) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, REAL(strlen)(*p) + 1);
    ++p;
  }
  COMMON_INTERCEPTOR_WRITE_RANGE(
      ctx, h->h_aliases, (p - h->h_aliases + 1) * sizeof(*h->h_aliases));
  p = h->h_addr_list;
  while (*p) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, h->h_length);
    ++p;
  }
  COMMON_INTERCEPTOR_WRITE_RANGE(
      ctx, h->h_addr_list, (p - h->h_addr_list + 1) * sizeof(*h->h_addr_list));
}
#endif

#if SANITIZER_INTERCEPT_GETHOSTBYNAME
INTERCEPTOR(struct __sanitizer_hostent *, gethostbyname, char *name) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, gethostbyname, name);
  struct __sanitizer_hostent *res = REAL(gethostbyname)(name);
  if (res) write_hostent(ctx, res);
  return res;
}

INTERCEPTOR(struct __sanitizer_hostent *, gethostbyaddr, void *addr, int len,
            int type) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, gethostbyaddr, addr, len, type);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, addr, len);
  struct __sanitizer_hostent *res = REAL(gethostbyaddr)(addr, len, type);
  if (res) write_hostent(ctx, res);
  return res;
}

INTERCEPTOR(struct __sanitizer_hostent *, gethostent, int fake) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, gethostent, fake);
  struct __sanitizer_hostent *res = REAL(gethostent)(fake);
  if (res) write_hostent(ctx, res);
  return res;
}

INTERCEPTOR(struct __sanitizer_hostent *, gethostbyname2, char *name, int af) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, gethostbyname2, name, af);
  struct __sanitizer_hostent *res = REAL(gethostbyname2)(name, af);
  if (res) write_hostent(ctx, res);
  return res;
}
#define INIT_GETHOSTBYNAME                  \
  COMMON_INTERCEPT_FUNCTION(gethostent);    \
  COMMON_INTERCEPT_FUNCTION(gethostbyaddr); \
  COMMON_INTERCEPT_FUNCTION(gethostbyname); \
  COMMON_INTERCEPT_FUNCTION(gethostbyname2);
#else
#define INIT_GETHOSTBYNAME
#endif

#if SANITIZER_INTERCEPT_GETHOSTBYNAME_R
INTERCEPTOR(int, gethostbyname_r, char *name, struct __sanitizer_hostent *ret,
            char *buf, SIZE_T buflen, __sanitizer_hostent **result,
            int *h_errnop) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, gethostbyname_r, name, ret, buf, buflen, result,
                           h_errnop);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(gethostbyname_r)(name, ret, buf, buflen, result, h_errnop);
  if (result) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
    if (res == 0 && *result) write_hostent(ctx, *result);
  }
  if (h_errnop)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, h_errnop, sizeof(*h_errnop));
  return res;
}
#define INIT_GETHOSTBYNAME_R COMMON_INTERCEPT_FUNCTION(gethostbyname_r);
#else
#define INIT_GETHOSTBYNAME_R
#endif

#if SANITIZER_INTERCEPT_GETHOSTENT_R
INTERCEPTOR(int, gethostent_r, struct __sanitizer_hostent *ret, char *buf,
            SIZE_T buflen, __sanitizer_hostent **result, int *h_errnop) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, gethostent_r, ret, buf, buflen, result,
                           h_errnop);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(gethostent_r)(ret, buf, buflen, result, h_errnop);
  if (result) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
    if (res == 0 && *result) write_hostent(ctx, *result);
  }
  if (h_errnop)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, h_errnop, sizeof(*h_errnop));
  return res;
}
#define INIT_GETHOSTENT_R                  \
  COMMON_INTERCEPT_FUNCTION(gethostent_r);
#else
#define INIT_GETHOSTENT_R
#endif

#if SANITIZER_INTERCEPT_GETHOSTBYADDR_R
INTERCEPTOR(int, gethostbyaddr_r, void *addr, int len, int type,
            struct __sanitizer_hostent *ret, char *buf, SIZE_T buflen,
            __sanitizer_hostent **result, int *h_errnop) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, gethostbyaddr_r, addr, len, type, ret, buf,
                           buflen, result, h_errnop);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, addr, len);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(gethostbyaddr_r)(addr, len, type, ret, buf, buflen, result,
                                  h_errnop);
  if (result) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
    if (res == 0 && *result) write_hostent(ctx, *result);
  }
  if (h_errnop)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, h_errnop, sizeof(*h_errnop));
  return res;
}
#define INIT_GETHOSTBYADDR_R                  \
  COMMON_INTERCEPT_FUNCTION(gethostbyaddr_r);
#else
#define INIT_GETHOSTBYADDR_R
#endif

#if SANITIZER_INTERCEPT_GETHOSTBYNAME2_R
INTERCEPTOR(int, gethostbyname2_r, char *name, int af,
            struct __sanitizer_hostent *ret, char *buf, SIZE_T buflen,
            __sanitizer_hostent **result, int *h_errnop) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, gethostbyname2_r, name, af, ret, buf, buflen,
                           result, h_errnop);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res =
      REAL(gethostbyname2_r)(name, af, ret, buf, buflen, result, h_errnop);
  if (result) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
    if (res == 0 && *result) write_hostent(ctx, *result);
  }
  if (h_errnop)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, h_errnop, sizeof(*h_errnop));
  return res;
}
#define INIT_GETHOSTBYNAME2_R                  \
  COMMON_INTERCEPT_FUNCTION(gethostbyname2_r);
#else
#define INIT_GETHOSTBYNAME2_R
#endif

#if SANITIZER_INTERCEPT_GETSOCKOPT
INTERCEPTOR(int, getsockopt, int sockfd, int level, int optname, void *optval,
            int *optlen) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getsockopt, sockfd, level, optname, optval,
                           optlen);
  if (optlen) COMMON_INTERCEPTOR_READ_RANGE(ctx, optlen, sizeof(*optlen));
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getsockopt)(sockfd, level, optname, optval, optlen);
  if (res == 0)
    if (optval && optlen) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, optval, *optlen);
  return res;
}
#define INIT_GETSOCKOPT COMMON_INTERCEPT_FUNCTION(getsockopt);
#else
#define INIT_GETSOCKOPT
#endif

#if SANITIZER_INTERCEPT_ACCEPT
INTERCEPTOR(int, accept, int fd, void *addr, unsigned *addrlen) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, accept, fd, addr, addrlen);
  unsigned addrlen0 = 0;
  if (addrlen) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, addrlen, sizeof(*addrlen));
    addrlen0 = *addrlen;
  }
  int fd2 = REAL(accept)(fd, addr, addrlen);
  if (fd2 >= 0) {
    if (fd >= 0) COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, fd2);
    if (addr && addrlen)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, addr, Min(*addrlen, addrlen0));
  }
  return fd2;
}
#define INIT_ACCEPT COMMON_INTERCEPT_FUNCTION(accept);
#else
#define INIT_ACCEPT
#endif

#if SANITIZER_INTERCEPT_ACCEPT4
INTERCEPTOR(int, accept4, int fd, void *addr, unsigned *addrlen, int f) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, accept4, fd, addr, addrlen, f);
  unsigned addrlen0 = 0;
  if (addrlen) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, addrlen, sizeof(*addrlen));
    addrlen0 = *addrlen;
  }
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int fd2 = REAL(accept4)(fd, addr, addrlen, f);
  if (fd2 >= 0) {
    if (fd >= 0) COMMON_INTERCEPTOR_FD_SOCKET_ACCEPT(ctx, fd, fd2);
    if (addr && addrlen)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, addr, Min(*addrlen, addrlen0));
  }
  return fd2;
}
#define INIT_ACCEPT4 COMMON_INTERCEPT_FUNCTION(accept4);
#else
#define INIT_ACCEPT4
#endif

#if SANITIZER_INTERCEPT_MODF
INTERCEPTOR(double, modf, double x, double *iptr) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, modf, x, iptr);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  double res = REAL(modf)(x, iptr);
  if (iptr) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, iptr, sizeof(*iptr));
  }
  return res;
}
INTERCEPTOR(float, modff, float x, float *iptr) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, modff, x, iptr);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  float res = REAL(modff)(x, iptr);
  if (iptr) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, iptr, sizeof(*iptr));
  }
  return res;
}
INTERCEPTOR(long double, modfl, long double x, long double *iptr) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, modfl, x, iptr);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  long double res = REAL(modfl)(x, iptr);
  if (iptr) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, iptr, sizeof(*iptr));
  }
  return res;
}
#define INIT_MODF                   \
  COMMON_INTERCEPT_FUNCTION(modf);  \
  COMMON_INTERCEPT_FUNCTION(modff); \
  COMMON_INTERCEPT_FUNCTION(modfl);
#else
#define INIT_MODF
#endif

#if SANITIZER_INTERCEPT_RECVMSG
static void write_msghdr(void *ctx, struct __sanitizer_msghdr *msg,
                         SSIZE_T maxlen) {
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, msg, sizeof(*msg));
  if (msg->msg_name && msg->msg_namelen)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, msg->msg_name, msg->msg_namelen);
  if (msg->msg_iov && msg->msg_iovlen)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, msg->msg_iov,
                                   sizeof(*msg->msg_iov) * msg->msg_iovlen);
  write_iovec(ctx, msg->msg_iov, msg->msg_iovlen, maxlen);
  if (msg->msg_control && msg->msg_controllen)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, msg->msg_control, msg->msg_controllen);
}

INTERCEPTOR(SSIZE_T, recvmsg, int fd, struct __sanitizer_msghdr *msg,
            int flags) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, recvmsg, fd, msg, flags);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SSIZE_T res = REAL(recvmsg)(fd, msg, flags);
  if (res >= 0) {
    if (fd >= 0) COMMON_INTERCEPTOR_FD_ACQUIRE(ctx, fd);
    if (msg) {
      write_msghdr(ctx, msg, res);
      COMMON_INTERCEPTOR_HANDLE_RECVMSG(ctx, msg);
    }
  }
  return res;
}
#define INIT_RECVMSG COMMON_INTERCEPT_FUNCTION(recvmsg);
#else
#define INIT_RECVMSG
#endif

#if SANITIZER_INTERCEPT_GETPEERNAME
INTERCEPTOR(int, getpeername, int sockfd, void *addr, unsigned *addrlen) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getpeername, sockfd, addr, addrlen);
  unsigned addr_sz;
  if (addrlen) addr_sz = *addrlen;
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getpeername)(sockfd, addr, addrlen);
  if (!res && addr && addrlen)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, addr, Min(addr_sz, *addrlen));
  return res;
}
#define INIT_GETPEERNAME COMMON_INTERCEPT_FUNCTION(getpeername);
#else
#define INIT_GETPEERNAME
#endif

#if SANITIZER_INTERCEPT_SYSINFO
INTERCEPTOR(int, sysinfo, void *info) {
  void *ctx;
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  COMMON_INTERCEPTOR_ENTER(ctx, sysinfo, info);
  int res = REAL(sysinfo)(info);
  if (!res && info)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, info, struct_sysinfo_sz);
  return res;
}
#define INIT_SYSINFO COMMON_INTERCEPT_FUNCTION(sysinfo);
#else
#define INIT_SYSINFO
#endif

#if SANITIZER_INTERCEPT_READDIR
INTERCEPTOR(__sanitizer_dirent *, opendir, const char *path) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, opendir, path);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  __sanitizer_dirent *res = REAL(opendir)(path);
  if (res)
    COMMON_INTERCEPTOR_DIR_ACQUIRE(ctx, path);
  return res;
}

INTERCEPTOR(__sanitizer_dirent *, readdir, void *dirp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, readdir, dirp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  __sanitizer_dirent *res = REAL(readdir)(dirp);
  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, res->d_reclen);
  return res;
}

INTERCEPTOR(int, readdir_r, void *dirp, __sanitizer_dirent *entry,
            __sanitizer_dirent **result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, readdir_r, dirp, entry, result);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(readdir_r)(dirp, entry, result);
  if (!res) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
    if (*result)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *result, (*result)->d_reclen);
  }
  return res;
}

#define INIT_READDIR                  \
  COMMON_INTERCEPT_FUNCTION(opendir); \
  COMMON_INTERCEPT_FUNCTION(readdir); \
  COMMON_INTERCEPT_FUNCTION(readdir_r);
#else
#define INIT_READDIR
#endif

#if SANITIZER_INTERCEPT_READDIR64
INTERCEPTOR(__sanitizer_dirent64 *, readdir64, void *dirp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, readdir64, dirp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  __sanitizer_dirent64 *res = REAL(readdir64)(dirp);
  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, res->d_reclen);
  return res;
}

INTERCEPTOR(int, readdir64_r, void *dirp, __sanitizer_dirent64 *entry,
            __sanitizer_dirent64 **result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, readdir64_r, dirp, entry, result);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(readdir64_r)(dirp, entry, result);
  if (!res) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
    if (*result)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *result, (*result)->d_reclen);
  }
  return res;
}
#define INIT_READDIR64                  \
  COMMON_INTERCEPT_FUNCTION(readdir64); \
  COMMON_INTERCEPT_FUNCTION(readdir64_r);
#else
#define INIT_READDIR64
#endif

#if SANITIZER_INTERCEPT_PTRACE
INTERCEPTOR(uptr, ptrace, int request, int pid, void *addr, void *data) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ptrace, request, pid, addr, data);
  __sanitizer_iovec local_iovec;

  if (data) {
    if (request == ptrace_setregs)
      COMMON_INTERCEPTOR_READ_RANGE(ctx, data, struct_user_regs_struct_sz);
    else if (request == ptrace_setfpregs)
      COMMON_INTERCEPTOR_READ_RANGE(ctx, data, struct_user_fpregs_struct_sz);
    else if (request == ptrace_setfpxregs)
      COMMON_INTERCEPTOR_READ_RANGE(ctx, data, struct_user_fpxregs_struct_sz);
    else if (request == ptrace_setvfpregs)
      COMMON_INTERCEPTOR_READ_RANGE(ctx, data, struct_user_vfpregs_struct_sz);
    else if (request == ptrace_setsiginfo)
      COMMON_INTERCEPTOR_READ_RANGE(ctx, data, siginfo_t_sz);
    // Some kernel might zero the iovec::iov_base in case of invalid
    // write access.  In this case copy the invalid address for further
    // inspection.
    else if (request == ptrace_setregset || request == ptrace_getregset) {
      __sanitizer_iovec *iovec = (__sanitizer_iovec*)data;
      COMMON_INTERCEPTOR_READ_RANGE(ctx, iovec, sizeof(*iovec));
      local_iovec = *iovec;
      if (request == ptrace_setregset)
        COMMON_INTERCEPTOR_READ_RANGE(ctx, iovec->iov_base, iovec->iov_len);
    }
  }

  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  uptr res = REAL(ptrace)(request, pid, addr, data);

  if (!res && data) {
    // Note that PEEK* requests assign different meaning to the return value.
    // This function does not handle them (nor does it need to).
    if (request == ptrace_getregs)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, data, struct_user_regs_struct_sz);
    else if (request == ptrace_getfpregs)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, data, struct_user_fpregs_struct_sz);
    else if (request == ptrace_getfpxregs)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, data, struct_user_fpxregs_struct_sz);
    else if (request == ptrace_getvfpregs)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, data, struct_user_vfpregs_struct_sz);
    else if (request == ptrace_getsiginfo)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, data, siginfo_t_sz);
    else if (request == ptrace_geteventmsg)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, data, sizeof(unsigned long));
    else if (request == ptrace_getregset) {
      __sanitizer_iovec *iovec = (__sanitizer_iovec*)data;
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, iovec, sizeof(*iovec));
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, local_iovec.iov_base,
                                     local_iovec.iov_len);
    }
  }
  return res;
}

#define INIT_PTRACE COMMON_INTERCEPT_FUNCTION(ptrace);
#else
#define INIT_PTRACE
#endif

#if SANITIZER_INTERCEPT_SETLOCALE
INTERCEPTOR(char *, setlocale, int category, char *locale) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, setlocale, category, locale);
  if (locale)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, locale, REAL(strlen)(locale) + 1);
  char *res = REAL(setlocale)(category, locale);
  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  return res;
}

#define INIT_SETLOCALE COMMON_INTERCEPT_FUNCTION(setlocale);
#else
#define INIT_SETLOCALE
#endif

#if SANITIZER_INTERCEPT_GETCWD
INTERCEPTOR(char *, getcwd, char *buf, SIZE_T size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getcwd, buf, size);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(getcwd)(buf, size);
  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  return res;
}
#define INIT_GETCWD COMMON_INTERCEPT_FUNCTION(getcwd);
#else
#define INIT_GETCWD
#endif

#if SANITIZER_INTERCEPT_GET_CURRENT_DIR_NAME
INTERCEPTOR(char *, get_current_dir_name, int fake) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, get_current_dir_name, fake);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(get_current_dir_name)(fake);
  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  return res;
}

#define INIT_GET_CURRENT_DIR_NAME \
  COMMON_INTERCEPT_FUNCTION(get_current_dir_name);
#else
#define INIT_GET_CURRENT_DIR_NAME
#endif

UNUSED static inline void FixRealStrtolEndptr(const char *nptr, char **endptr) {
  CHECK(endptr);
  if (nptr == *endptr) {
    // No digits were found at strtol call, we need to find out the last
    // symbol accessed by strtoll on our own.
    // We get this symbol by skipping leading blanks and optional +/- sign.
    while (IsSpace(*nptr)) nptr++;
    if (*nptr == '+' || *nptr == '-') nptr++;
    *endptr = const_cast<char *>(nptr);
  }
  CHECK(*endptr >= nptr);
}

UNUSED static inline void StrtolFixAndCheck(void *ctx, const char *nptr,
                             char **endptr, char *real_endptr, int base) {
  if (endptr) {
    *endptr = real_endptr;
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, endptr, sizeof(*endptr));
  }
  // If base has unsupported value, strtol can exit with EINVAL
  // without reading any characters. So do additional checks only
  // if base is valid.
  bool is_valid_base = (base == 0) || (2 <= base && base <= 36);
  if (is_valid_base) {
    FixRealStrtolEndptr(nptr, &real_endptr);
  }
  COMMON_INTERCEPTOR_READ_STRING(ctx, nptr, is_valid_base ?
                                 (real_endptr - nptr) + 1 : 0);
}


#if SANITIZER_INTERCEPT_STRTOIMAX
INTERCEPTOR(INTMAX_T, strtoimax, const char *nptr, char **endptr, int base) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strtoimax, nptr, endptr, base);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *real_endptr;
  INTMAX_T res = REAL(strtoimax)(nptr, &real_endptr, base);
  StrtolFixAndCheck(ctx, nptr, endptr, real_endptr, base);
  return res;
}

INTERCEPTOR(INTMAX_T, strtoumax, const char *nptr, char **endptr, int base) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strtoumax, nptr, endptr, base);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *real_endptr;
  INTMAX_T res = REAL(strtoumax)(nptr, &real_endptr, base);
  StrtolFixAndCheck(ctx, nptr, endptr, real_endptr, base);
  return res;
}

#define INIT_STRTOIMAX                  \
  COMMON_INTERCEPT_FUNCTION(strtoimax); \
  COMMON_INTERCEPT_FUNCTION(strtoumax);
#else
#define INIT_STRTOIMAX
#endif

#if SANITIZER_INTERCEPT_MBSTOWCS
INTERCEPTOR(SIZE_T, mbstowcs, wchar_t *dest, const char *src, SIZE_T len) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, mbstowcs, dest, src, len);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SIZE_T res = REAL(mbstowcs)(dest, src, len);
  if (res != (SIZE_T) - 1 && dest) {
    SIZE_T write_cnt = res + (res < len);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dest, write_cnt * sizeof(wchar_t));
  }
  return res;
}

INTERCEPTOR(SIZE_T, mbsrtowcs, wchar_t *dest, const char **src, SIZE_T len,
            void *ps) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, mbsrtowcs, dest, src, len, ps);
  if (src) COMMON_INTERCEPTOR_READ_RANGE(ctx, src, sizeof(*src));
  if (ps) COMMON_INTERCEPTOR_READ_RANGE(ctx, ps, mbstate_t_sz);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SIZE_T res = REAL(mbsrtowcs)(dest, src, len, ps);
  if (res != (SIZE_T)(-1) && dest && src) {
    // This function, and several others, may or may not write the terminating
    // \0 character. They write it iff they clear *src.
    SIZE_T write_cnt = res + !*src;
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dest, write_cnt * sizeof(wchar_t));
  }
  return res;
}

#define INIT_MBSTOWCS                  \
  COMMON_INTERCEPT_FUNCTION(mbstowcs); \
  COMMON_INTERCEPT_FUNCTION(mbsrtowcs);
#else
#define INIT_MBSTOWCS
#endif

#if SANITIZER_INTERCEPT_MBSNRTOWCS
INTERCEPTOR(SIZE_T, mbsnrtowcs, wchar_t *dest, const char **src, SIZE_T nms,
            SIZE_T len, void *ps) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, mbsnrtowcs, dest, src, nms, len, ps);
  if (src) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, sizeof(*src));
    if (nms) COMMON_INTERCEPTOR_READ_RANGE(ctx, *src, nms);
  }
  if (ps) COMMON_INTERCEPTOR_READ_RANGE(ctx, ps, mbstate_t_sz);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SIZE_T res = REAL(mbsnrtowcs)(dest, src, nms, len, ps);
  if (res != (SIZE_T)(-1) && dest && src) {
    SIZE_T write_cnt = res + !*src;
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dest, write_cnt * sizeof(wchar_t));
  }
  return res;
}

#define INIT_MBSNRTOWCS COMMON_INTERCEPT_FUNCTION(mbsnrtowcs);
#else
#define INIT_MBSNRTOWCS
#endif

#if SANITIZER_INTERCEPT_WCSTOMBS
INTERCEPTOR(SIZE_T, wcstombs, char *dest, const wchar_t *src, SIZE_T len) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, wcstombs, dest, src, len);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SIZE_T res = REAL(wcstombs)(dest, src, len);
  if (res != (SIZE_T) - 1 && dest) {
    SIZE_T write_cnt = res + (res < len);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dest, write_cnt);
  }
  return res;
}

INTERCEPTOR(SIZE_T, wcsrtombs, char *dest, const wchar_t **src, SIZE_T len,
            void *ps) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, wcsrtombs, dest, src, len, ps);
  if (src) COMMON_INTERCEPTOR_READ_RANGE(ctx, src, sizeof(*src));
  if (ps) COMMON_INTERCEPTOR_READ_RANGE(ctx, ps, mbstate_t_sz);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SIZE_T res = REAL(wcsrtombs)(dest, src, len, ps);
  if (res != (SIZE_T) - 1 && dest && src) {
    SIZE_T write_cnt = res + !*src;
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dest, write_cnt);
  }
  return res;
}

#define INIT_WCSTOMBS                  \
  COMMON_INTERCEPT_FUNCTION(wcstombs); \
  COMMON_INTERCEPT_FUNCTION(wcsrtombs);
#else
#define INIT_WCSTOMBS
#endif

#if SANITIZER_INTERCEPT_WCSNRTOMBS
INTERCEPTOR(SIZE_T, wcsnrtombs, char *dest, const wchar_t **src, SIZE_T nms,
            SIZE_T len, void *ps) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, wcsnrtombs, dest, src, nms, len, ps);
  if (src) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, src, sizeof(*src));
    if (nms) COMMON_INTERCEPTOR_READ_RANGE(ctx, *src, nms);
  }
  if (ps) COMMON_INTERCEPTOR_READ_RANGE(ctx, ps, mbstate_t_sz);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SIZE_T res = REAL(wcsnrtombs)(dest, src, nms, len, ps);
  if (res != ((SIZE_T)-1) && dest && src) {
    SIZE_T write_cnt = res + !*src;
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dest, write_cnt);
  }
  return res;
}

#define INIT_WCSNRTOMBS COMMON_INTERCEPT_FUNCTION(wcsnrtombs);
#else
#define INIT_WCSNRTOMBS
#endif


#if SANITIZER_INTERCEPT_WCRTOMB
INTERCEPTOR(SIZE_T, wcrtomb, char *dest, wchar_t src, void *ps) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, wcrtomb, dest, src, ps);
  if (ps) COMMON_INTERCEPTOR_READ_RANGE(ctx, ps, mbstate_t_sz);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SIZE_T res = REAL(wcrtomb)(dest, src, ps);
  if (res != ((SIZE_T)-1) && dest) {
    SIZE_T write_cnt = res;
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dest, write_cnt);
  }
  return res;
}

#define INIT_WCRTOMB COMMON_INTERCEPT_FUNCTION(wcrtomb);
#else
#define INIT_WCRTOMB
#endif

#if SANITIZER_INTERCEPT_TCGETATTR
INTERCEPTOR(int, tcgetattr, int fd, void *termios_p) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, tcgetattr, fd, termios_p);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(tcgetattr)(fd, termios_p);
  if (!res && termios_p)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, termios_p, struct_termios_sz);
  return res;
}

#define INIT_TCGETATTR COMMON_INTERCEPT_FUNCTION(tcgetattr);
#else
#define INIT_TCGETATTR
#endif

#if SANITIZER_INTERCEPT_REALPATH
INTERCEPTOR(char *, realpath, const char *path, char *resolved_path) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, realpath, path, resolved_path);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);

  // Workaround a bug in glibc where dlsym(RTLD_NEXT, ...) returns the oldest
  // version of a versioned symbol. For realpath(), this gives us something
  // (called __old_realpath) that does not handle NULL in the second argument.
  // Handle it as part of the interceptor.
  char *allocated_path = nullptr;
  if (!resolved_path)
    allocated_path = resolved_path = (char *)WRAP(malloc)(path_max + 1);

  char *res = REAL(realpath)(path, resolved_path);
  if (allocated_path && !res) WRAP(free)(allocated_path);
  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  return res;
}
#define INIT_REALPATH COMMON_INTERCEPT_FUNCTION(realpath);
#else
#define INIT_REALPATH
#endif

#if SANITIZER_INTERCEPT_CANONICALIZE_FILE_NAME
INTERCEPTOR(char *, canonicalize_file_name, const char *path) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, canonicalize_file_name, path);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  char *res = REAL(canonicalize_file_name)(path);
  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  return res;
}
#define INIT_CANONICALIZE_FILE_NAME \
  COMMON_INTERCEPT_FUNCTION(canonicalize_file_name);
#else
#define INIT_CANONICALIZE_FILE_NAME
#endif

#if SANITIZER_INTERCEPT_CONFSTR
INTERCEPTOR(SIZE_T, confstr, int name, char *buf, SIZE_T len) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, confstr, name, buf, len);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SIZE_T res = REAL(confstr)(name, buf, len);
  if (buf && res)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, res < len ? res : len);
  return res;
}
#define INIT_CONFSTR COMMON_INTERCEPT_FUNCTION(confstr);
#else
#define INIT_CONFSTR
#endif

#if SANITIZER_INTERCEPT_SCHED_GETAFFINITY
INTERCEPTOR(int, sched_getaffinity, int pid, SIZE_T cpusetsize, void *mask) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sched_getaffinity, pid, cpusetsize, mask);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(sched_getaffinity)(pid, cpusetsize, mask);
  if (mask && !res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mask, cpusetsize);
  return res;
}
#define INIT_SCHED_GETAFFINITY COMMON_INTERCEPT_FUNCTION(sched_getaffinity);
#else
#define INIT_SCHED_GETAFFINITY
#endif

#if SANITIZER_INTERCEPT_SCHED_GETPARAM
INTERCEPTOR(int, sched_getparam, int pid, void *param) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sched_getparam, pid, param);
  int res = REAL(sched_getparam)(pid, param);
  if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, param, struct_sched_param_sz);
  return res;
}
#define INIT_SCHED_GETPARAM COMMON_INTERCEPT_FUNCTION(sched_getparam);
#else
#define INIT_SCHED_GETPARAM
#endif

#if SANITIZER_INTERCEPT_STRERROR
INTERCEPTOR(char *, strerror, int errnum) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strerror, errnum);
  char *res = REAL(strerror)(errnum);
  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
  return res;
}
#define INIT_STRERROR COMMON_INTERCEPT_FUNCTION(strerror);
#else
#define INIT_STRERROR
#endif

#if SANITIZER_INTERCEPT_STRERROR_R
INTERCEPTOR(char *, strerror_r, int errnum, char *buf, SIZE_T buflen) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, strerror_r, errnum, buf, buflen);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(strerror_r)(errnum, buf, buflen);
  // There are 2 versions of strerror_r:
  //  * POSIX version returns 0 on success, negative error code on failure,
  //    writes message to buf.
  //  * GNU version returns message pointer, which points to either buf or some
  //    static storage.
  SIZE_T posix_res = (SIZE_T)res;
  if (posix_res < 1024 || posix_res > (SIZE_T) - 1024) {
    // POSIX version. Spec is not clear on whether buf is NULL-terminated.
    // At least on OSX, buf contents are valid even when the call fails.
    SIZE_T sz = internal_strnlen(buf, buflen);
    if (sz < buflen) ++sz;
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, sz);
  } else {
    // GNU version.
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  }
  return res;
}
#define INIT_STRERROR_R COMMON_INTERCEPT_FUNCTION(strerror_r);
#else
#define INIT_STRERROR_R
#endif

#if SANITIZER_INTERCEPT_XPG_STRERROR_R
INTERCEPTOR(int, __xpg_strerror_r, int errnum, char *buf, SIZE_T buflen) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, __xpg_strerror_r, errnum, buf, buflen);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(__xpg_strerror_r)(errnum, buf, buflen);
  // This version always returns a null-terminated string.
  if (buf && buflen)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, REAL(strlen)(buf) + 1);
  return res;
}
#define INIT_XPG_STRERROR_R COMMON_INTERCEPT_FUNCTION(__xpg_strerror_r);
#else
#define INIT_XPG_STRERROR_R
#endif

#if SANITIZER_INTERCEPT_SCANDIR
typedef int (*scandir_filter_f)(const struct __sanitizer_dirent *);
typedef int (*scandir_compar_f)(const struct __sanitizer_dirent **,
                                const struct __sanitizer_dirent **);

static THREADLOCAL scandir_filter_f scandir_filter;
static THREADLOCAL scandir_compar_f scandir_compar;

static int wrapped_scandir_filter(const struct __sanitizer_dirent *dir) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(1);
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(dir, dir->d_reclen);
  return scandir_filter(dir);
}

static int wrapped_scandir_compar(const struct __sanitizer_dirent **a,
                                  const struct __sanitizer_dirent **b) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(2);
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(a, sizeof(*a));
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(*a, (*a)->d_reclen);
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(b, sizeof(*b));
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(*b, (*b)->d_reclen);
  return scandir_compar(a, b);
}

INTERCEPTOR(int, scandir, char *dirp, __sanitizer_dirent ***namelist,
            scandir_filter_f filter, scandir_compar_f compar) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, scandir, dirp, namelist, filter, compar);
  if (dirp) COMMON_INTERCEPTOR_READ_RANGE(ctx, dirp, REAL(strlen)(dirp) + 1);
  scandir_filter = filter;
  scandir_compar = compar;
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(scandir)(dirp, namelist,
                          filter ? wrapped_scandir_filter : nullptr,
                          compar ? wrapped_scandir_compar : nullptr);
  scandir_filter = nullptr;
  scandir_compar = nullptr;
  if (namelist && res > 0) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, namelist, sizeof(*namelist));
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *namelist, sizeof(**namelist) * res);
    for (int i = 0; i < res; ++i)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, (*namelist)[i],
                                     (*namelist)[i]->d_reclen);
  }
  return res;
}
#define INIT_SCANDIR COMMON_INTERCEPT_FUNCTION(scandir);
#else
#define INIT_SCANDIR
#endif

#if SANITIZER_INTERCEPT_SCANDIR64
typedef int (*scandir64_filter_f)(const struct __sanitizer_dirent64 *);
typedef int (*scandir64_compar_f)(const struct __sanitizer_dirent64 **,
                                  const struct __sanitizer_dirent64 **);

static THREADLOCAL scandir64_filter_f scandir64_filter;
static THREADLOCAL scandir64_compar_f scandir64_compar;

static int wrapped_scandir64_filter(const struct __sanitizer_dirent64 *dir) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(1);
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(dir, dir->d_reclen);
  return scandir64_filter(dir);
}

static int wrapped_scandir64_compar(const struct __sanitizer_dirent64 **a,
                                    const struct __sanitizer_dirent64 **b) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(2);
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(a, sizeof(*a));
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(*a, (*a)->d_reclen);
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(b, sizeof(*b));
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(*b, (*b)->d_reclen);
  return scandir64_compar(a, b);
}

INTERCEPTOR(int, scandir64, char *dirp, __sanitizer_dirent64 ***namelist,
            scandir64_filter_f filter, scandir64_compar_f compar) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, scandir64, dirp, namelist, filter, compar);
  if (dirp) COMMON_INTERCEPTOR_READ_RANGE(ctx, dirp, REAL(strlen)(dirp) + 1);
  scandir64_filter = filter;
  scandir64_compar = compar;
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res =
      REAL(scandir64)(dirp, namelist,
                      filter ? wrapped_scandir64_filter : nullptr,
                      compar ? wrapped_scandir64_compar : nullptr);
  scandir64_filter = nullptr;
  scandir64_compar = nullptr;
  if (namelist && res > 0) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, namelist, sizeof(*namelist));
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *namelist, sizeof(**namelist) * res);
    for (int i = 0; i < res; ++i)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, (*namelist)[i],
                                     (*namelist)[i]->d_reclen);
  }
  return res;
}
#define INIT_SCANDIR64 COMMON_INTERCEPT_FUNCTION(scandir64);
#else
#define INIT_SCANDIR64
#endif

#if SANITIZER_INTERCEPT_GETGROUPS
INTERCEPTOR(int, getgroups, int size, u32 *lst) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getgroups, size, lst);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getgroups)(size, lst);
  if (res && lst) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, lst, res * sizeof(*lst));
  return res;
}
#define INIT_GETGROUPS COMMON_INTERCEPT_FUNCTION(getgroups);
#else
#define INIT_GETGROUPS
#endif

#if SANITIZER_INTERCEPT_POLL
static void read_pollfd(void *ctx, __sanitizer_pollfd *fds,
                        __sanitizer_nfds_t nfds) {
  for (unsigned i = 0; i < nfds; ++i) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, &fds[i].fd, sizeof(fds[i].fd));
    COMMON_INTERCEPTOR_READ_RANGE(ctx, &fds[i].events, sizeof(fds[i].events));
  }
}

static void write_pollfd(void *ctx, __sanitizer_pollfd *fds,
                         __sanitizer_nfds_t nfds) {
  for (unsigned i = 0; i < nfds; ++i)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, &fds[i].revents,
                                   sizeof(fds[i].revents));
}

INTERCEPTOR(int, poll, __sanitizer_pollfd *fds, __sanitizer_nfds_t nfds,
            int timeout) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, poll, fds, nfds, timeout);
  if (fds && nfds) read_pollfd(ctx, fds, nfds);
  int res = COMMON_INTERCEPTOR_BLOCK_REAL(poll)(fds, nfds, timeout);
  if (fds && nfds) write_pollfd(ctx, fds, nfds);
  return res;
}
#define INIT_POLL COMMON_INTERCEPT_FUNCTION(poll);
#else
#define INIT_POLL
#endif

#if SANITIZER_INTERCEPT_PPOLL
INTERCEPTOR(int, ppoll, __sanitizer_pollfd *fds, __sanitizer_nfds_t nfds,
            void *timeout_ts, __sanitizer_sigset_t *sigmask) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ppoll, fds, nfds, timeout_ts, sigmask);
  if (fds && nfds) read_pollfd(ctx, fds, nfds);
  if (timeout_ts)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, timeout_ts, struct_timespec_sz);
  // FIXME: read sigmask when all of sigemptyset, etc are intercepted.
  int res =
      COMMON_INTERCEPTOR_BLOCK_REAL(ppoll)(fds, nfds, timeout_ts, sigmask);
  if (fds && nfds) write_pollfd(ctx, fds, nfds);
  return res;
}
#define INIT_PPOLL COMMON_INTERCEPT_FUNCTION(ppoll);
#else
#define INIT_PPOLL
#endif

#if SANITIZER_INTERCEPT_WORDEXP
INTERCEPTOR(int, wordexp, char *s, __sanitizer_wordexp_t *p, int flags) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, wordexp, s, p, flags);
  if (s) COMMON_INTERCEPTOR_READ_RANGE(ctx, s, REAL(strlen)(s) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(wordexp)(s, p, flags);
  if (!res && p) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, sizeof(*p));
    if (p->we_wordc)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->we_wordv,
                                     sizeof(*p->we_wordv) * p->we_wordc);
    for (uptr i = 0; i < p->we_wordc; ++i) {
      char *w = p->we_wordv[i];
      if (w) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, w, REAL(strlen)(w) + 1);
    }
  }
  return res;
}
#define INIT_WORDEXP COMMON_INTERCEPT_FUNCTION(wordexp);
#else
#define INIT_WORDEXP
#endif

#if SANITIZER_INTERCEPT_SIGWAIT
INTERCEPTOR(int, sigwait, __sanitizer_sigset_t *set, int *sig) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sigwait, set, sig);
  // FIXME: read sigset_t when all of sigemptyset, etc are intercepted
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(sigwait)(set, sig);
  if (!res && sig) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, sig, sizeof(*sig));
  return res;
}
#define INIT_SIGWAIT COMMON_INTERCEPT_FUNCTION(sigwait);
#else
#define INIT_SIGWAIT
#endif

#if SANITIZER_INTERCEPT_SIGWAITINFO
INTERCEPTOR(int, sigwaitinfo, __sanitizer_sigset_t *set, void *info) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sigwaitinfo, set, info);
  // FIXME: read sigset_t when all of sigemptyset, etc are intercepted
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(sigwaitinfo)(set, info);
  if (res > 0 && info) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, info, siginfo_t_sz);
  return res;
}
#define INIT_SIGWAITINFO COMMON_INTERCEPT_FUNCTION(sigwaitinfo);
#else
#define INIT_SIGWAITINFO
#endif

#if SANITIZER_INTERCEPT_SIGTIMEDWAIT
INTERCEPTOR(int, sigtimedwait, __sanitizer_sigset_t *set, void *info,
            void *timeout) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sigtimedwait, set, info, timeout);
  if (timeout) COMMON_INTERCEPTOR_READ_RANGE(ctx, timeout, struct_timespec_sz);
  // FIXME: read sigset_t when all of sigemptyset, etc are intercepted
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(sigtimedwait)(set, info, timeout);
  if (res > 0 && info) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, info, siginfo_t_sz);
  return res;
}
#define INIT_SIGTIMEDWAIT COMMON_INTERCEPT_FUNCTION(sigtimedwait);
#else
#define INIT_SIGTIMEDWAIT
#endif

#if SANITIZER_INTERCEPT_SIGSETOPS
INTERCEPTOR(int, sigemptyset, __sanitizer_sigset_t *set) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sigemptyset, set);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(sigemptyset)(set);
  if (!res && set) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, set, sizeof(*set));
  return res;
}

INTERCEPTOR(int, sigfillset, __sanitizer_sigset_t *set) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sigfillset, set);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(sigfillset)(set);
  if (!res && set) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, set, sizeof(*set));
  return res;
}
#define INIT_SIGSETOPS                    \
  COMMON_INTERCEPT_FUNCTION(sigemptyset); \
  COMMON_INTERCEPT_FUNCTION(sigfillset);
#else
#define INIT_SIGSETOPS
#endif

#if SANITIZER_INTERCEPT_SIGPENDING
INTERCEPTOR(int, sigpending, __sanitizer_sigset_t *set) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sigpending, set);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(sigpending)(set);
  if (!res && set) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, set, sizeof(*set));
  return res;
}
#define INIT_SIGPENDING COMMON_INTERCEPT_FUNCTION(sigpending);
#else
#define INIT_SIGPENDING
#endif

#if SANITIZER_INTERCEPT_SIGPROCMASK
INTERCEPTOR(int, sigprocmask, int how, __sanitizer_sigset_t *set,
            __sanitizer_sigset_t *oldset) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sigprocmask, how, set, oldset);
  // FIXME: read sigset_t when all of sigemptyset, etc are intercepted
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(sigprocmask)(how, set, oldset);
  if (!res && oldset)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, oldset, sizeof(*oldset));
  return res;
}
#define INIT_SIGPROCMASK COMMON_INTERCEPT_FUNCTION(sigprocmask);
#else
#define INIT_SIGPROCMASK
#endif

#if SANITIZER_INTERCEPT_BACKTRACE
INTERCEPTOR(int, backtrace, void **buffer, int size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, backtrace, buffer, size);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(backtrace)(buffer, size);
  if (res && buffer)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buffer, res * sizeof(*buffer));
  return res;
}

INTERCEPTOR(char **, backtrace_symbols, void **buffer, int size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, backtrace_symbols, buffer, size);
  if (buffer && size)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, buffer, size * sizeof(*buffer));
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char **res = REAL(backtrace_symbols)(buffer, size);
  if (res && size) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, size * sizeof(*res));
    for (int i = 0; i < size; ++i)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res[i], REAL(strlen(res[i])) + 1);
  }
  return res;
}
#define INIT_BACKTRACE                  \
  COMMON_INTERCEPT_FUNCTION(backtrace); \
  COMMON_INTERCEPT_FUNCTION(backtrace_symbols);
#else
#define INIT_BACKTRACE
#endif

#if SANITIZER_INTERCEPT__EXIT
INTERCEPTOR(void, _exit, int status) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, _exit, status);
  int status1 = COMMON_INTERCEPTOR_ON_EXIT(ctx);
  if (status == 0) status = status1;
  REAL(_exit)(status);
}
#define INIT__EXIT COMMON_INTERCEPT_FUNCTION(_exit);
#else
#define INIT__EXIT
#endif

#if SANITIZER_INTERCEPT_PHTREAD_MUTEX
INTERCEPTOR(int, pthread_mutex_lock, void *m) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pthread_mutex_lock, m);
  int res = REAL(pthread_mutex_lock)(m);
  if (res == errno_EOWNERDEAD)
    COMMON_INTERCEPTOR_MUTEX_REPAIR(ctx, m);
  if (res == 0 || res == errno_EOWNERDEAD)
    COMMON_INTERCEPTOR_MUTEX_LOCK(ctx, m);
  return res;
}

INTERCEPTOR(int, pthread_mutex_unlock, void *m) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pthread_mutex_unlock, m);
  COMMON_INTERCEPTOR_MUTEX_UNLOCK(ctx, m);
  return REAL(pthread_mutex_unlock)(m);
}

#define INIT_PTHREAD_MUTEX_LOCK COMMON_INTERCEPT_FUNCTION(pthread_mutex_lock)
#define INIT_PTHREAD_MUTEX_UNLOCK \
  COMMON_INTERCEPT_FUNCTION(pthread_mutex_unlock)
#else
#define INIT_PTHREAD_MUTEX_LOCK
#define INIT_PTHREAD_MUTEX_UNLOCK
#endif

#if SANITIZER_INTERCEPT_GETMNTENT || SANITIZER_INTERCEPT_GETMNTENT_R
static void write_mntent(void *ctx, __sanitizer_mntent *mnt) {
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mnt, sizeof(*mnt));
  if (mnt->mnt_fsname)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mnt->mnt_fsname,
                                   REAL(strlen)(mnt->mnt_fsname) + 1);
  if (mnt->mnt_dir)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mnt->mnt_dir,
                                   REAL(strlen)(mnt->mnt_dir) + 1);
  if (mnt->mnt_type)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mnt->mnt_type,
                                   REAL(strlen)(mnt->mnt_type) + 1);
  if (mnt->mnt_opts)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, mnt->mnt_opts,
                                   REAL(strlen)(mnt->mnt_opts) + 1);
}
#endif

#if SANITIZER_INTERCEPT_GETMNTENT
INTERCEPTOR(__sanitizer_mntent *, getmntent, void *fp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getmntent, fp);
  __sanitizer_mntent *res = REAL(getmntent)(fp);
  if (res) write_mntent(ctx, res);
  return res;
}
#define INIT_GETMNTENT COMMON_INTERCEPT_FUNCTION(getmntent);
#else
#define INIT_GETMNTENT
#endif

#if SANITIZER_INTERCEPT_GETMNTENT_R
INTERCEPTOR(__sanitizer_mntent *, getmntent_r, void *fp,
            __sanitizer_mntent *mntbuf, char *buf, int buflen) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getmntent_r, fp, mntbuf, buf, buflen);
  __sanitizer_mntent *res = REAL(getmntent_r)(fp, mntbuf, buf, buflen);
  if (res) write_mntent(ctx, res);
  return res;
}
#define INIT_GETMNTENT_R COMMON_INTERCEPT_FUNCTION(getmntent_r);
#else
#define INIT_GETMNTENT_R
#endif

#if SANITIZER_INTERCEPT_STATFS
INTERCEPTOR(int, statfs, char *path, void *buf) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, statfs, path, buf);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(statfs)(path, buf);
  if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statfs_sz);
  return res;
}
INTERCEPTOR(int, fstatfs, int fd, void *buf) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fstatfs, fd, buf);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(fstatfs)(fd, buf);
  if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statfs_sz);
  return res;
}
#define INIT_STATFS                  \
  COMMON_INTERCEPT_FUNCTION(statfs); \
  COMMON_INTERCEPT_FUNCTION(fstatfs);
#else
#define INIT_STATFS
#endif

#if SANITIZER_INTERCEPT_STATFS64
INTERCEPTOR(int, statfs64, char *path, void *buf) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, statfs64, path, buf);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(statfs64)(path, buf);
  if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statfs64_sz);
  return res;
}
INTERCEPTOR(int, fstatfs64, int fd, void *buf) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fstatfs64, fd, buf);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(fstatfs64)(fd, buf);
  if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statfs64_sz);
  return res;
}
#define INIT_STATFS64                  \
  COMMON_INTERCEPT_FUNCTION(statfs64); \
  COMMON_INTERCEPT_FUNCTION(fstatfs64);
#else
#define INIT_STATFS64
#endif

#if SANITIZER_INTERCEPT_STATVFS
INTERCEPTOR(int, statvfs, char *path, void *buf) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, statvfs, path, buf);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(statvfs)(path, buf);
  if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs_sz);
  return res;
}
INTERCEPTOR(int, fstatvfs, int fd, void *buf) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fstatvfs, fd, buf);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(fstatvfs)(fd, buf);
  if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs_sz);
  return res;
}
#define INIT_STATVFS                  \
  COMMON_INTERCEPT_FUNCTION(statvfs); \
  COMMON_INTERCEPT_FUNCTION(fstatvfs);
#else
#define INIT_STATVFS
#endif

#if SANITIZER_INTERCEPT_STATVFS64
INTERCEPTOR(int, statvfs64, char *path, void *buf) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, statvfs64, path, buf);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(statvfs64)(path, buf);
  if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs64_sz);
  return res;
}
INTERCEPTOR(int, fstatvfs64, int fd, void *buf) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fstatvfs64, fd, buf);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(fstatvfs64)(fd, buf);
  if (!res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, struct_statvfs64_sz);
  return res;
}
#define INIT_STATVFS64                  \
  COMMON_INTERCEPT_FUNCTION(statvfs64); \
  COMMON_INTERCEPT_FUNCTION(fstatvfs64);
#else
#define INIT_STATVFS64
#endif

#if SANITIZER_INTERCEPT_INITGROUPS
INTERCEPTOR(int, initgroups, char *user, u32 group) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, initgroups, user, group);
  if (user) COMMON_INTERCEPTOR_READ_RANGE(ctx, user, REAL(strlen)(user) + 1);
  int res = REAL(initgroups)(user, group);
  return res;
}
#define INIT_INITGROUPS COMMON_INTERCEPT_FUNCTION(initgroups);
#else
#define INIT_INITGROUPS
#endif

#if SANITIZER_INTERCEPT_ETHER_NTOA_ATON
INTERCEPTOR(char *, ether_ntoa, __sanitizer_ether_addr *addr) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ether_ntoa, addr);
  if (addr) COMMON_INTERCEPTOR_READ_RANGE(ctx, addr, sizeof(*addr));
  char *res = REAL(ether_ntoa)(addr);
  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
  return res;
}
INTERCEPTOR(__sanitizer_ether_addr *, ether_aton, char *buf) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ether_aton, buf);
  if (buf) COMMON_INTERCEPTOR_READ_RANGE(ctx, buf, REAL(strlen)(buf) + 1);
  __sanitizer_ether_addr *res = REAL(ether_aton)(buf);
  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, sizeof(*res));
  return res;
}
#define INIT_ETHER_NTOA_ATON             \
  COMMON_INTERCEPT_FUNCTION(ether_ntoa); \
  COMMON_INTERCEPT_FUNCTION(ether_aton);
#else
#define INIT_ETHER_NTOA_ATON
#endif

#if SANITIZER_INTERCEPT_ETHER_HOST
INTERCEPTOR(int, ether_ntohost, char *hostname, __sanitizer_ether_addr *addr) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ether_ntohost, hostname, addr);
  if (addr) COMMON_INTERCEPTOR_READ_RANGE(ctx, addr, sizeof(*addr));
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(ether_ntohost)(hostname, addr);
  if (!res && hostname)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, hostname, REAL(strlen)(hostname) + 1);
  return res;
}
INTERCEPTOR(int, ether_hostton, char *hostname, __sanitizer_ether_addr *addr) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ether_hostton, hostname, addr);
  if (hostname)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, hostname, REAL(strlen)(hostname) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(ether_hostton)(hostname, addr);
  if (!res && addr) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, addr, sizeof(*addr));
  return res;
}
INTERCEPTOR(int, ether_line, char *line, __sanitizer_ether_addr *addr,
            char *hostname) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ether_line, line, addr, hostname);
  if (line) COMMON_INTERCEPTOR_READ_RANGE(ctx, line, REAL(strlen)(line) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(ether_line)(line, addr, hostname);
  if (!res) {
    if (addr) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, addr, sizeof(*addr));
    if (hostname)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, hostname, REAL(strlen)(hostname) + 1);
  }
  return res;
}
#define INIT_ETHER_HOST                     \
  COMMON_INTERCEPT_FUNCTION(ether_ntohost); \
  COMMON_INTERCEPT_FUNCTION(ether_hostton); \
  COMMON_INTERCEPT_FUNCTION(ether_line);
#else
#define INIT_ETHER_HOST
#endif

#if SANITIZER_INTERCEPT_ETHER_R
INTERCEPTOR(char *, ether_ntoa_r, __sanitizer_ether_addr *addr, char *buf) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ether_ntoa_r, addr, buf);
  if (addr) COMMON_INTERCEPTOR_READ_RANGE(ctx, addr, sizeof(*addr));
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(ether_ntoa_r)(addr, buf);
  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
  return res;
}
INTERCEPTOR(__sanitizer_ether_addr *, ether_aton_r, char *buf,
            __sanitizer_ether_addr *addr) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ether_aton_r, buf, addr);
  if (buf) COMMON_INTERCEPTOR_READ_RANGE(ctx, buf, REAL(strlen)(buf) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  __sanitizer_ether_addr *res = REAL(ether_aton_r)(buf, addr);
  if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, sizeof(*res));
  return res;
}
#define INIT_ETHER_R                       \
  COMMON_INTERCEPT_FUNCTION(ether_ntoa_r); \
  COMMON_INTERCEPT_FUNCTION(ether_aton_r);
#else
#define INIT_ETHER_R
#endif

#if SANITIZER_INTERCEPT_SHMCTL
INTERCEPTOR(int, shmctl, int shmid, int cmd, void *buf) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, shmctl, shmid, cmd, buf);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(shmctl)(shmid, cmd, buf);
  if (res >= 0) {
    unsigned sz = 0;
    if (cmd == shmctl_ipc_stat || cmd == shmctl_shm_stat)
      sz = sizeof(__sanitizer_shmid_ds);
    else if (cmd == shmctl_ipc_info)
      sz = struct_shminfo_sz;
    else if (cmd == shmctl_shm_info)
      sz = struct_shm_info_sz;
    if (sz) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, buf, sz);
  }
  return res;
}
#define INIT_SHMCTL COMMON_INTERCEPT_FUNCTION(shmctl);
#else
#define INIT_SHMCTL
#endif

#if SANITIZER_INTERCEPT_RANDOM_R
INTERCEPTOR(int, random_r, void *buf, u32 *result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, random_r, buf, result);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(random_r)(buf, result);
  if (!res && result)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
  return res;
}
#define INIT_RANDOM_R COMMON_INTERCEPT_FUNCTION(random_r);
#else
#define INIT_RANDOM_R
#endif

// FIXME: under ASan the REAL() call below may write to freed memory and corrupt
// its metadata. See
// https://code.google.com/p/address-sanitizer/issues/detail?id=321.
#if SANITIZER_INTERCEPT_PTHREAD_ATTR_GET ||              \
    SANITIZER_INTERCEPT_PTHREAD_ATTR_GETINHERITSSCHED || \
    SANITIZER_INTERCEPT_PTHREAD_MUTEXATTR_GET ||         \
    SANITIZER_INTERCEPT_PTHREAD_RWLOCKATTR_GET ||        \
    SANITIZER_INTERCEPT_PTHREAD_CONDATTR_GET ||          \
    SANITIZER_INTERCEPT_PTHREAD_BARRIERATTR_GET
#define INTERCEPTOR_PTHREAD_OBJECT_ATTR_GET(fn, sz)            \
  INTERCEPTOR(int, fn, void *attr, void *r) {                  \
    void *ctx;                                                 \
    COMMON_INTERCEPTOR_ENTER(ctx, fn, attr, r);                \
    int res = REAL(fn)(attr, r);                               \
    if (!res && r) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, r, sz); \
    return res;                                                \
  }
#define INTERCEPTOR_PTHREAD_ATTR_GET(what, sz) \
  INTERCEPTOR_PTHREAD_OBJECT_ATTR_GET(pthread_attr_get##what, sz)
#define INTERCEPTOR_PTHREAD_MUTEXATTR_GET(what, sz) \
  INTERCEPTOR_PTHREAD_OBJECT_ATTR_GET(pthread_mutexattr_get##what, sz)
#define INTERCEPTOR_PTHREAD_RWLOCKATTR_GET(what, sz) \
  INTERCEPTOR_PTHREAD_OBJECT_ATTR_GET(pthread_rwlockattr_get##what, sz)
#define INTERCEPTOR_PTHREAD_CONDATTR_GET(what, sz) \
  INTERCEPTOR_PTHREAD_OBJECT_ATTR_GET(pthread_condattr_get##what, sz)
#define INTERCEPTOR_PTHREAD_BARRIERATTR_GET(what, sz) \
  INTERCEPTOR_PTHREAD_OBJECT_ATTR_GET(pthread_barrierattr_get##what, sz)
#endif

#if SANITIZER_INTERCEPT_PTHREAD_ATTR_GET
INTERCEPTOR_PTHREAD_ATTR_GET(detachstate, sizeof(int))
INTERCEPTOR_PTHREAD_ATTR_GET(guardsize, sizeof(SIZE_T))
INTERCEPTOR_PTHREAD_ATTR_GET(schedparam, struct_sched_param_sz)
INTERCEPTOR_PTHREAD_ATTR_GET(schedpolicy, sizeof(int))
INTERCEPTOR_PTHREAD_ATTR_GET(scope, sizeof(int))
INTERCEPTOR_PTHREAD_ATTR_GET(stacksize, sizeof(SIZE_T))
INTERCEPTOR(int, pthread_attr_getstack, void *attr, void **addr, SIZE_T *size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pthread_attr_getstack, attr, addr, size);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(pthread_attr_getstack)(attr, addr, size);
  if (!res) {
    if (addr) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, addr, sizeof(*addr));
    if (size) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, size, sizeof(*size));
  }
  return res;
}

// We may need to call the real pthread_attr_getstack from the run-time
// in sanitizer_common, but we don't want to include the interception headers
// there. So, just define this function here.
namespace __sanitizer {
extern "C" {
int real_pthread_attr_getstack(void *attr, void **addr, SIZE_T *size) {
  return REAL(pthread_attr_getstack)(attr, addr, size);
}
}  // extern "C"
}  // namespace __sanitizer

#define INIT_PTHREAD_ATTR_GET                             \
  COMMON_INTERCEPT_FUNCTION(pthread_attr_getdetachstate); \
  COMMON_INTERCEPT_FUNCTION(pthread_attr_getguardsize);   \
  COMMON_INTERCEPT_FUNCTION(pthread_attr_getschedparam);  \
  COMMON_INTERCEPT_FUNCTION(pthread_attr_getschedpolicy); \
  COMMON_INTERCEPT_FUNCTION(pthread_attr_getscope);       \
  COMMON_INTERCEPT_FUNCTION(pthread_attr_getstacksize);   \
  COMMON_INTERCEPT_FUNCTION(pthread_attr_getstack);
#else
#define INIT_PTHREAD_ATTR_GET
#endif

#if SANITIZER_INTERCEPT_PTHREAD_ATTR_GETINHERITSCHED
INTERCEPTOR_PTHREAD_ATTR_GET(inheritsched, sizeof(int))

#define INIT_PTHREAD_ATTR_GETINHERITSCHED \
  COMMON_INTERCEPT_FUNCTION(pthread_attr_getinheritsched);
#else
#define INIT_PTHREAD_ATTR_GETINHERITSCHED
#endif

#if SANITIZER_INTERCEPT_PTHREAD_ATTR_GETAFFINITY_NP
INTERCEPTOR(int, pthread_attr_getaffinity_np, void *attr, SIZE_T cpusetsize,
            void *cpuset) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pthread_attr_getaffinity_np, attr, cpusetsize,
                           cpuset);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(pthread_attr_getaffinity_np)(attr, cpusetsize, cpuset);
  if (!res && cpusetsize && cpuset)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, cpuset, cpusetsize);
  return res;
}

#define INIT_PTHREAD_ATTR_GETAFFINITY_NP \
  COMMON_INTERCEPT_FUNCTION(pthread_attr_getaffinity_np);
#else
#define INIT_PTHREAD_ATTR_GETAFFINITY_NP
#endif

#if SANITIZER_INTERCEPT_PTHREAD_MUTEXATTR_GETPSHARED
INTERCEPTOR_PTHREAD_MUTEXATTR_GET(pshared, sizeof(int))
#define INIT_PTHREAD_MUTEXATTR_GETPSHARED \
  COMMON_INTERCEPT_FUNCTION(pthread_mutexattr_getpshared);
#else
#define INIT_PTHREAD_MUTEXATTR_GETPSHARED
#endif

#if SANITIZER_INTERCEPT_PTHREAD_MUTEXATTR_GETTYPE
INTERCEPTOR_PTHREAD_MUTEXATTR_GET(type, sizeof(int))
#define INIT_PTHREAD_MUTEXATTR_GETTYPE \
  COMMON_INTERCEPT_FUNCTION(pthread_mutexattr_gettype);
#else
#define INIT_PTHREAD_MUTEXATTR_GETTYPE
#endif

#if SANITIZER_INTERCEPT_PTHREAD_MUTEXATTR_GETPROTOCOL
INTERCEPTOR_PTHREAD_MUTEXATTR_GET(protocol, sizeof(int))
#define INIT_PTHREAD_MUTEXATTR_GETPROTOCOL \
  COMMON_INTERCEPT_FUNCTION(pthread_mutexattr_getprotocol);
#else
#define INIT_PTHREAD_MUTEXATTR_GETPROTOCOL
#endif

#if SANITIZER_INTERCEPT_PTHREAD_MUTEXATTR_GETPRIOCEILING
INTERCEPTOR_PTHREAD_MUTEXATTR_GET(prioceiling, sizeof(int))
#define INIT_PTHREAD_MUTEXATTR_GETPRIOCEILING \
  COMMON_INTERCEPT_FUNCTION(pthread_mutexattr_getprioceiling);
#else
#define INIT_PTHREAD_MUTEXATTR_GETPRIOCEILING
#endif

#if SANITIZER_INTERCEPT_PTHREAD_MUTEXATTR_GETROBUST
INTERCEPTOR_PTHREAD_MUTEXATTR_GET(robust, sizeof(int))
#define INIT_PTHREAD_MUTEXATTR_GETROBUST \
  COMMON_INTERCEPT_FUNCTION(pthread_mutexattr_getrobust);
#else
#define INIT_PTHREAD_MUTEXATTR_GETROBUST
#endif

#if SANITIZER_INTERCEPT_PTHREAD_MUTEXATTR_GETROBUST_NP
INTERCEPTOR_PTHREAD_MUTEXATTR_GET(robust_np, sizeof(int))
#define INIT_PTHREAD_MUTEXATTR_GETROBUST_NP \
  COMMON_INTERCEPT_FUNCTION(pthread_mutexattr_getrobust_np);
#else
#define INIT_PTHREAD_MUTEXATTR_GETROBUST_NP
#endif

#if SANITIZER_INTERCEPT_PTHREAD_RWLOCKATTR_GETPSHARED
INTERCEPTOR_PTHREAD_RWLOCKATTR_GET(pshared, sizeof(int))
#define INIT_PTHREAD_RWLOCKATTR_GETPSHARED \
  COMMON_INTERCEPT_FUNCTION(pthread_rwlockattr_getpshared);
#else
#define INIT_PTHREAD_RWLOCKATTR_GETPSHARED
#endif

#if SANITIZER_INTERCEPT_PTHREAD_RWLOCKATTR_GETKIND_NP
INTERCEPTOR_PTHREAD_RWLOCKATTR_GET(kind_np, sizeof(int))
#define INIT_PTHREAD_RWLOCKATTR_GETKIND_NP \
  COMMON_INTERCEPT_FUNCTION(pthread_rwlockattr_getkind_np);
#else
#define INIT_PTHREAD_RWLOCKATTR_GETKIND_NP
#endif

#if SANITIZER_INTERCEPT_PTHREAD_CONDATTR_GETPSHARED
INTERCEPTOR_PTHREAD_CONDATTR_GET(pshared, sizeof(int))
#define INIT_PTHREAD_CONDATTR_GETPSHARED \
  COMMON_INTERCEPT_FUNCTION(pthread_condattr_getpshared);
#else
#define INIT_PTHREAD_CONDATTR_GETPSHARED
#endif

#if SANITIZER_INTERCEPT_PTHREAD_CONDATTR_GETCLOCK
INTERCEPTOR_PTHREAD_CONDATTR_GET(clock, sizeof(int))
#define INIT_PTHREAD_CONDATTR_GETCLOCK \
  COMMON_INTERCEPT_FUNCTION(pthread_condattr_getclock);
#else
#define INIT_PTHREAD_CONDATTR_GETCLOCK
#endif

#if SANITIZER_INTERCEPT_PTHREAD_BARRIERATTR_GETPSHARED
INTERCEPTOR_PTHREAD_BARRIERATTR_GET(pshared, sizeof(int)) // !mac !android
#define INIT_PTHREAD_BARRIERATTR_GETPSHARED \
  COMMON_INTERCEPT_FUNCTION(pthread_barrierattr_getpshared);
#else
#define INIT_PTHREAD_BARRIERATTR_GETPSHARED
#endif

#if SANITIZER_INTERCEPT_TMPNAM
INTERCEPTOR(char *, tmpnam, char *s) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, tmpnam, s);
  char *res = REAL(tmpnam)(s);
  if (res) {
    if (s)
      // FIXME: under ASan the call below may write to freed memory and corrupt
      // its metadata. See
      // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, s, REAL(strlen)(s) + 1);
    else
      COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
  }
  return res;
}
#define INIT_TMPNAM COMMON_INTERCEPT_FUNCTION(tmpnam);
#else
#define INIT_TMPNAM
#endif

#if SANITIZER_INTERCEPT_TMPNAM_R
INTERCEPTOR(char *, tmpnam_r, char *s) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, tmpnam_r, s);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(tmpnam_r)(s);
  if (res && s) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, s, REAL(strlen)(s) + 1);
  return res;
}
#define INIT_TMPNAM_R COMMON_INTERCEPT_FUNCTION(tmpnam_r);
#else
#define INIT_TMPNAM_R
#endif

#if SANITIZER_INTERCEPT_TEMPNAM
INTERCEPTOR(char *, tempnam, char *dir, char *pfx) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, tempnam, dir, pfx);
  if (dir) COMMON_INTERCEPTOR_READ_RANGE(ctx, dir, REAL(strlen)(dir) + 1);
  if (pfx) COMMON_INTERCEPTOR_READ_RANGE(ctx, pfx, REAL(strlen)(pfx) + 1);
  char *res = REAL(tempnam)(dir, pfx);
  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res) + 1);
  return res;
}
#define INIT_TEMPNAM COMMON_INTERCEPT_FUNCTION(tempnam);
#else
#define INIT_TEMPNAM
#endif

#if SANITIZER_INTERCEPT_PTHREAD_SETNAME_NP
INTERCEPTOR(int, pthread_setname_np, uptr thread, const char *name) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pthread_setname_np, thread, name);
  COMMON_INTERCEPTOR_READ_STRING(ctx, name, 0);
  COMMON_INTERCEPTOR_SET_PTHREAD_NAME(ctx, thread, name);
  return REAL(pthread_setname_np)(thread, name);
}
#define INIT_PTHREAD_SETNAME_NP COMMON_INTERCEPT_FUNCTION(pthread_setname_np);
#else
#define INIT_PTHREAD_SETNAME_NP
#endif

#if SANITIZER_INTERCEPT_SINCOS
INTERCEPTOR(void, sincos, double x, double *sin, double *cos) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sincos, x, sin, cos);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  REAL(sincos)(x, sin, cos);
  if (sin) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, sin, sizeof(*sin));
  if (cos) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, cos, sizeof(*cos));
}
INTERCEPTOR(void, sincosf, float x, float *sin, float *cos) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sincosf, x, sin, cos);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  REAL(sincosf)(x, sin, cos);
  if (sin) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, sin, sizeof(*sin));
  if (cos) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, cos, sizeof(*cos));
}
INTERCEPTOR(void, sincosl, long double x, long double *sin, long double *cos) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sincosl, x, sin, cos);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  REAL(sincosl)(x, sin, cos);
  if (sin) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, sin, sizeof(*sin));
  if (cos) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, cos, sizeof(*cos));
}
#define INIT_SINCOS                   \
  COMMON_INTERCEPT_FUNCTION(sincos);  \
  COMMON_INTERCEPT_FUNCTION(sincosf); \
  COMMON_INTERCEPT_FUNCTION(sincosl);
#else
#define INIT_SINCOS
#endif

#if SANITIZER_INTERCEPT_REMQUO
INTERCEPTOR(double, remquo, double x, double y, int *quo) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, remquo, x, y, quo);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  double res = REAL(remquo)(x, y, quo);
  if (quo) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, quo, sizeof(*quo));
  return res;
}
INTERCEPTOR(float, remquof, float x, float y, int *quo) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, remquof, x, y, quo);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  float res = REAL(remquof)(x, y, quo);
  if (quo) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, quo, sizeof(*quo));
  return res;
}
INTERCEPTOR(long double, remquol, long double x, long double y, int *quo) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, remquol, x, y, quo);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  long double res = REAL(remquol)(x, y, quo);
  if (quo) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, quo, sizeof(*quo));
  return res;
}
#define INIT_REMQUO                   \
  COMMON_INTERCEPT_FUNCTION(remquo);  \
  COMMON_INTERCEPT_FUNCTION(remquof); \
  COMMON_INTERCEPT_FUNCTION(remquol);
#else
#define INIT_REMQUO
#endif

#if SANITIZER_INTERCEPT_LGAMMA
extern int signgam;
INTERCEPTOR(double, lgamma, double x) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, lgamma, x);
  double res = REAL(lgamma)(x);
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, &signgam, sizeof(signgam));
  return res;
}
INTERCEPTOR(float, lgammaf, float x) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, lgammaf, x);
  float res = REAL(lgammaf)(x);
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, &signgam, sizeof(signgam));
  return res;
}
INTERCEPTOR(long double, lgammal, long double x) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, lgammal, x);
  long double res = REAL(lgammal)(x);
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, &signgam, sizeof(signgam));
  return res;
}
#define INIT_LGAMMA                   \
  COMMON_INTERCEPT_FUNCTION(lgamma);  \
  COMMON_INTERCEPT_FUNCTION(lgammaf); \
  COMMON_INTERCEPT_FUNCTION(lgammal);
#else
#define INIT_LGAMMA
#endif

#if SANITIZER_INTERCEPT_LGAMMA_R
INTERCEPTOR(double, lgamma_r, double x, int *signp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, lgamma_r, x, signp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  double res = REAL(lgamma_r)(x, signp);
  if (signp) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, signp, sizeof(*signp));
  return res;
}
INTERCEPTOR(float, lgammaf_r, float x, int *signp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, lgammaf_r, x, signp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  float res = REAL(lgammaf_r)(x, signp);
  if (signp) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, signp, sizeof(*signp));
  return res;
}
#define INIT_LGAMMA_R                   \
  COMMON_INTERCEPT_FUNCTION(lgamma_r);  \
  COMMON_INTERCEPT_FUNCTION(lgammaf_r);
#else
#define INIT_LGAMMA_R
#endif

#if SANITIZER_INTERCEPT_LGAMMAL_R
INTERCEPTOR(long double, lgammal_r, long double x, int *signp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, lgammal_r, x, signp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  long double res = REAL(lgammal_r)(x, signp);
  if (signp) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, signp, sizeof(*signp));
  return res;
}
#define INIT_LGAMMAL_R COMMON_INTERCEPT_FUNCTION(lgammal_r);
#else
#define INIT_LGAMMAL_R
#endif

#if SANITIZER_INTERCEPT_DRAND48_R
INTERCEPTOR(int, drand48_r, void *buffer, double *result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, drand48_r, buffer, result);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(drand48_r)(buffer, result);
  if (result) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
  return res;
}
INTERCEPTOR(int, lrand48_r, void *buffer, long *result) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, lrand48_r, buffer, result);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(lrand48_r)(buffer, result);
  if (result) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, result, sizeof(*result));
  return res;
}
#define INIT_DRAND48_R                  \
  COMMON_INTERCEPT_FUNCTION(drand48_r); \
  COMMON_INTERCEPT_FUNCTION(lrand48_r);
#else
#define INIT_DRAND48_R
#endif

#if SANITIZER_INTERCEPT_RAND_R
INTERCEPTOR(int, rand_r, unsigned *seedp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, rand_r, seedp);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, seedp, sizeof(*seedp));
  return REAL(rand_r)(seedp);
}
#define INIT_RAND_R COMMON_INTERCEPT_FUNCTION(rand_r);
#else
#define INIT_RAND_R
#endif

#if SANITIZER_INTERCEPT_GETLINE
INTERCEPTOR(SSIZE_T, getline, char **lineptr, SIZE_T *n, void *stream) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getline, lineptr, n, stream);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SSIZE_T res = REAL(getline)(lineptr, n, stream);
  if (res > 0) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, lineptr, sizeof(*lineptr));
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n, sizeof(*n));
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *lineptr, res + 1);
  }
  return res;
}

// FIXME: under ASan the call below may write to freed memory and corrupt its
// metadata. See
// https://code.google.com/p/address-sanitizer/issues/detail?id=321.
#define GETDELIM_INTERCEPTOR_IMPL(vname)                                       \
  {                                                                            \
    void *ctx;                                                                 \
    COMMON_INTERCEPTOR_ENTER(ctx, vname, lineptr, n, delim, stream);           \
    SSIZE_T res = REAL(vname)(lineptr, n, delim, stream);                      \
    if (res > 0) {                                                             \
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, lineptr, sizeof(*lineptr));          \
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, n, sizeof(*n));                      \
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *lineptr, res + 1);                  \
    }                                                                          \
    return res;                                                                \
  }

INTERCEPTOR(SSIZE_T, __getdelim, char **lineptr, SIZE_T *n, int delim,
            void *stream)
GETDELIM_INTERCEPTOR_IMPL(__getdelim)

// There's no __getdelim() on FreeBSD so we supply the getdelim() interceptor
// with its own body.
INTERCEPTOR(SSIZE_T, getdelim, char **lineptr, SIZE_T *n, int delim,
            void *stream)
GETDELIM_INTERCEPTOR_IMPL(getdelim)

#define INIT_GETLINE                     \
  COMMON_INTERCEPT_FUNCTION(getline);    \
  COMMON_INTERCEPT_FUNCTION(__getdelim); \
  COMMON_INTERCEPT_FUNCTION(getdelim);
#else
#define INIT_GETLINE
#endif

#if SANITIZER_INTERCEPT_ICONV
INTERCEPTOR(SIZE_T, iconv, void *cd, char **inbuf, SIZE_T *inbytesleft,
            char **outbuf, SIZE_T *outbytesleft) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, iconv, cd, inbuf, inbytesleft, outbuf,
                           outbytesleft);
  if (inbytesleft)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, inbytesleft, sizeof(*inbytesleft));
  if (inbuf && inbytesleft)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, *inbuf, *inbytesleft);
  if (outbytesleft)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, outbytesleft, sizeof(*outbytesleft));
  void *outbuf_orig = outbuf ? *outbuf : nullptr;
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SIZE_T res = REAL(iconv)(cd, inbuf, inbytesleft, outbuf, outbytesleft);
  if (res != (SIZE_T) - 1 && outbuf && *outbuf > outbuf_orig) {
    SIZE_T sz = (char *)*outbuf - (char *)outbuf_orig;
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, outbuf_orig, sz);
  }
  return res;
}
#define INIT_ICONV COMMON_INTERCEPT_FUNCTION(iconv);
#else
#define INIT_ICONV
#endif

#if SANITIZER_INTERCEPT_TIMES
INTERCEPTOR(__sanitizer_clock_t, times, void *tms) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, times, tms);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  __sanitizer_clock_t res = REAL(times)(tms);
  if (res != (__sanitizer_clock_t)-1 && tms)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, tms, struct_tms_sz);
  return res;
}
#define INIT_TIMES COMMON_INTERCEPT_FUNCTION(times);
#else
#define INIT_TIMES
#endif

#if SANITIZER_INTERCEPT_TLS_GET_ADDR
#define INIT_TLS_GET_ADDR COMMON_INTERCEPT_FUNCTION(__tls_get_addr)
// If you see any crashes around this functions, there are 2 known issues with
// it: 1. __tls_get_addr can be called with mis-aligned stack due to:
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58066
// 2. It can be called recursively if sanitizer code uses __tls_get_addr
// to access thread local variables (it should not happen normally,
// because sanitizers use initial-exec tls model).
INTERCEPTOR(void *, __tls_get_addr, void *arg) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, __tls_get_addr, arg);
  void *res = REAL(__tls_get_addr)(arg);
  uptr tls_begin, tls_end;
  COMMON_INTERCEPTOR_GET_TLS_RANGE(&tls_begin, &tls_end);
  DTLS::DTV *dtv = DTLS_on_tls_get_addr(arg, res, tls_begin, tls_end);
  if (dtv) {
    // New DTLS block has been allocated.
    COMMON_INTERCEPTOR_INITIALIZE_RANGE((void *)dtv->beg, dtv->size);
  }
  return res;
}
#else
#define INIT_TLS_GET_ADDR
#endif

#if SANITIZER_INTERCEPT_LISTXATTR
INTERCEPTOR(SSIZE_T, listxattr, const char *path, char *list, SIZE_T size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, listxattr, path, list, size);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SSIZE_T res = REAL(listxattr)(path, list, size);
  // Here and below, size == 0 is a special case where nothing is written to the
  // buffer, and res contains the desired buffer size.
  if (size && res > 0 && list) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, list, res);
  return res;
}
INTERCEPTOR(SSIZE_T, llistxattr, const char *path, char *list, SIZE_T size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, llistxattr, path, list, size);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SSIZE_T res = REAL(llistxattr)(path, list, size);
  if (size && res > 0 && list) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, list, res);
  return res;
}
INTERCEPTOR(SSIZE_T, flistxattr, int fd, char *list, SIZE_T size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, flistxattr, fd, list, size);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SSIZE_T res = REAL(flistxattr)(fd, list, size);
  if (size && res > 0 && list) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, list, res);
  return res;
}
#define INIT_LISTXATTR                   \
  COMMON_INTERCEPT_FUNCTION(listxattr);  \
  COMMON_INTERCEPT_FUNCTION(llistxattr); \
  COMMON_INTERCEPT_FUNCTION(flistxattr);
#else
#define INIT_LISTXATTR
#endif

#if SANITIZER_INTERCEPT_GETXATTR
INTERCEPTOR(SSIZE_T, getxattr, const char *path, const char *name, char *value,
            SIZE_T size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getxattr, path, name, value, size);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  if (name) COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SSIZE_T res = REAL(getxattr)(path, name, value, size);
  if (size && res > 0 && value) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, value, res);
  return res;
}
INTERCEPTOR(SSIZE_T, lgetxattr, const char *path, const char *name, char *value,
            SIZE_T size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, lgetxattr, path, name, value, size);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  if (name) COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SSIZE_T res = REAL(lgetxattr)(path, name, value, size);
  if (size && res > 0 && value) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, value, res);
  return res;
}
INTERCEPTOR(SSIZE_T, fgetxattr, int fd, const char *name, char *value,
            SIZE_T size) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fgetxattr, fd, name, value, size);
  if (name) COMMON_INTERCEPTOR_READ_RANGE(ctx, name, REAL(strlen)(name) + 1);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  SSIZE_T res = REAL(fgetxattr)(fd, name, value, size);
  if (size && res > 0 && value) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, value, res);
  return res;
}
#define INIT_GETXATTR                   \
  COMMON_INTERCEPT_FUNCTION(getxattr);  \
  COMMON_INTERCEPT_FUNCTION(lgetxattr); \
  COMMON_INTERCEPT_FUNCTION(fgetxattr);
#else
#define INIT_GETXATTR
#endif

#if SANITIZER_INTERCEPT_GETRESID
INTERCEPTOR(int, getresuid, void *ruid, void *euid, void *suid) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getresuid, ruid, euid, suid);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getresuid)(ruid, euid, suid);
  if (res >= 0) {
    if (ruid) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ruid, uid_t_sz);
    if (euid) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, euid, uid_t_sz);
    if (suid) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, suid, uid_t_sz);
  }
  return res;
}
INTERCEPTOR(int, getresgid, void *rgid, void *egid, void *sgid) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getresgid, rgid, egid, sgid);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getresgid)(rgid, egid, sgid);
  if (res >= 0) {
    if (rgid) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, rgid, gid_t_sz);
    if (egid) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, egid, gid_t_sz);
    if (sgid) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, sgid, gid_t_sz);
  }
  return res;
}
#define INIT_GETRESID                   \
  COMMON_INTERCEPT_FUNCTION(getresuid); \
  COMMON_INTERCEPT_FUNCTION(getresgid);
#else
#define INIT_GETRESID
#endif

#if SANITIZER_INTERCEPT_GETIFADDRS
// As long as getifaddrs()/freeifaddrs() use calloc()/free(), we don't need to
// intercept freeifaddrs(). If that ceases to be the case, we might need to
// intercept it to poison the memory again.
INTERCEPTOR(int, getifaddrs, __sanitizer_ifaddrs **ifap) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getifaddrs, ifap);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(getifaddrs)(ifap);
  if (res == 0 && ifap) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ifap, sizeof(void *));
    __sanitizer_ifaddrs *p = *ifap;
    while (p) {
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, sizeof(__sanitizer_ifaddrs));
      if (p->ifa_name)
        COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->ifa_name,
                                       REAL(strlen)(p->ifa_name) + 1);
      if (p->ifa_addr)
        COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->ifa_addr, struct_sockaddr_sz);
      if (p->ifa_netmask)
        COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->ifa_netmask, struct_sockaddr_sz);
      // On Linux this is a union, but the other member also points to a
      // struct sockaddr, so the following is sufficient.
      if (p->ifa_dstaddr)
        COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p->ifa_dstaddr, struct_sockaddr_sz);
      // FIXME(smatveev): Unpoison p->ifa_data as well.
      p = p->ifa_next;
    }
  }
  return res;
}
#define INIT_GETIFADDRS                  \
  COMMON_INTERCEPT_FUNCTION(getifaddrs);
#else
#define INIT_GETIFADDRS
#endif

#if SANITIZER_INTERCEPT_IF_INDEXTONAME
INTERCEPTOR(char *, if_indextoname, unsigned int ifindex, char* ifname) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, if_indextoname, ifindex, ifname);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  char *res = REAL(if_indextoname)(ifindex, ifname);
  if (res && ifname)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ifname, REAL(strlen)(ifname) + 1);
  return res;
}
INTERCEPTOR(unsigned int, if_nametoindex, const char* ifname) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, if_nametoindex, ifname);
  if (ifname)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, ifname, REAL(strlen)(ifname) + 1);
  return REAL(if_nametoindex)(ifname);
}
#define INIT_IF_INDEXTONAME                  \
  COMMON_INTERCEPT_FUNCTION(if_indextoname); \
  COMMON_INTERCEPT_FUNCTION(if_nametoindex);
#else
#define INIT_IF_INDEXTONAME
#endif

#if SANITIZER_INTERCEPT_CAPGET
INTERCEPTOR(int, capget, void *hdrp, void *datap) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, capget, hdrp, datap);
  if (hdrp)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, hdrp, __user_cap_header_struct_sz);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(capget)(hdrp, datap);
  if (res == 0 && datap)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, datap, __user_cap_data_struct_sz);
  // We can also return -1 and write to hdrp->version if the version passed in
  // hdrp->version is unsupported. But that's not a trivial condition to check,
  // and anyway COMMON_INTERCEPTOR_READ_RANGE protects us to some extent.
  return res;
}
INTERCEPTOR(int, capset, void *hdrp, const void *datap) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, capset, hdrp, datap);
  if (hdrp)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, hdrp, __user_cap_header_struct_sz);
  if (datap)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, datap, __user_cap_data_struct_sz);
  return REAL(capset)(hdrp, datap);
}
#define INIT_CAPGET                  \
  COMMON_INTERCEPT_FUNCTION(capget); \
  COMMON_INTERCEPT_FUNCTION(capset);
#else
#define INIT_CAPGET
#endif

#if SANITIZER_INTERCEPT_AEABI_MEM
DECLARE_REAL_AND_INTERCEPTOR(void *, memmove, void *, const void *, uptr)
DECLARE_REAL_AND_INTERCEPTOR(void *, memcpy, void *, const void *, uptr)
DECLARE_REAL_AND_INTERCEPTOR(void *, memset, void *, int, uptr)

INTERCEPTOR(void *, __aeabi_memmove, void *to, const void *from, uptr size) {
  return WRAP(memmove)(to, from, size);
}
INTERCEPTOR(void *, __aeabi_memmove4, void *to, const void *from, uptr size) {
  return WRAP(memmove)(to, from, size);
}
INTERCEPTOR(void *, __aeabi_memmove8, void *to, const void *from, uptr size) {
  return WRAP(memmove)(to, from, size);
}
INTERCEPTOR(void *, __aeabi_memcpy, void *to, const void *from, uptr size) {
  return WRAP(memcpy)(to, from, size);
}
INTERCEPTOR(void *, __aeabi_memcpy4, void *to, const void *from, uptr size) {
  return WRAP(memcpy)(to, from, size);
}
INTERCEPTOR(void *, __aeabi_memcpy8, void *to, const void *from, uptr size) {
  return WRAP(memcpy)(to, from, size);
}
// Note the argument order.
INTERCEPTOR(void *, __aeabi_memset, void *block, uptr size, int c) {
  return WRAP(memset)(block, c, size);
}
INTERCEPTOR(void *, __aeabi_memset4, void *block, uptr size, int c) {
  return WRAP(memset)(block, c, size);
}
INTERCEPTOR(void *, __aeabi_memset8, void *block, uptr size, int c) {
  return WRAP(memset)(block, c, size);
}
INTERCEPTOR(void *, __aeabi_memclr, void *block, uptr size) {
  return WRAP(memset)(block, 0, size);
}
INTERCEPTOR(void *, __aeabi_memclr4, void *block, uptr size) {
  return WRAP(memset)(block, 0, size);
}
INTERCEPTOR(void *, __aeabi_memclr8, void *block, uptr size) {
  return WRAP(memset)(block, 0, size);
}
#define INIT_AEABI_MEM                         \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memmove);  \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memmove4); \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memmove8); \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memcpy);   \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memcpy4);  \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memcpy8);  \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memset);   \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memset4);  \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memset8);  \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memclr);   \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memclr4);  \
  COMMON_INTERCEPT_FUNCTION(__aeabi_memclr8);
#else
#define INIT_AEABI_MEM
#endif  // SANITIZER_INTERCEPT_AEABI_MEM

#if SANITIZER_INTERCEPT___BZERO
DECLARE_REAL_AND_INTERCEPTOR(void *, memset, void *, int, uptr);

INTERCEPTOR(void *, __bzero, void *block, uptr size) {
  return WRAP(memset)(block, 0, size);
}
#define INIT___BZERO COMMON_INTERCEPT_FUNCTION(__bzero);
#else
#define INIT___BZERO
#endif  // SANITIZER_INTERCEPT___BZERO

#if SANITIZER_INTERCEPT_FTIME
INTERCEPTOR(int, ftime, __sanitizer_timeb *tp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, ftime, tp);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(ftime)(tp);
  if (tp)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, tp, sizeof(*tp));
  return res;
}
#define INIT_FTIME COMMON_INTERCEPT_FUNCTION(ftime);
#else
#define INIT_FTIME
#endif  // SANITIZER_INTERCEPT_FTIME

#if SANITIZER_INTERCEPT_XDR
INTERCEPTOR(void, xdrmem_create, __sanitizer_XDR *xdrs, uptr addr,
            unsigned size, int op) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, xdrmem_create, xdrs, addr, size, op);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  REAL(xdrmem_create)(xdrs, addr, size, op);
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, xdrs, sizeof(*xdrs));
  if (op == __sanitizer_XDR_ENCODE) {
    // It's not obvious how much data individual xdr_ routines write.
    // Simply unpoison the entire target buffer in advance.
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, (void *)addr, size);
  }
}

INTERCEPTOR(void, xdrstdio_create, __sanitizer_XDR *xdrs, void *file, int op) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, xdrstdio_create, xdrs, file, op);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  REAL(xdrstdio_create)(xdrs, file, op);
  COMMON_INTERCEPTOR_WRITE_RANGE(ctx, xdrs, sizeof(*xdrs));
}

// FIXME: under ASan the call below may write to freed memory and corrupt
// its metadata. See
// https://code.google.com/p/address-sanitizer/issues/detail?id=321.
#define XDR_INTERCEPTOR(F, T)                             \
  INTERCEPTOR(int, F, __sanitizer_XDR *xdrs, T *p) {      \
    void *ctx;                                            \
    COMMON_INTERCEPTOR_ENTER(ctx, F, xdrs, p);            \
    if (p && xdrs->x_op == __sanitizer_XDR_ENCODE)        \
      COMMON_INTERCEPTOR_READ_RANGE(ctx, p, sizeof(*p));  \
    int res = REAL(F)(xdrs, p);                           \
    if (res && p && xdrs->x_op == __sanitizer_XDR_DECODE) \
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, sizeof(*p)); \
    return res;                                           \
  }

XDR_INTERCEPTOR(xdr_short, short)
XDR_INTERCEPTOR(xdr_u_short, unsigned short)
XDR_INTERCEPTOR(xdr_int, int)
XDR_INTERCEPTOR(xdr_u_int, unsigned)
XDR_INTERCEPTOR(xdr_long, long)
XDR_INTERCEPTOR(xdr_u_long, unsigned long)
XDR_INTERCEPTOR(xdr_hyper, long long)
XDR_INTERCEPTOR(xdr_u_hyper, unsigned long long)
XDR_INTERCEPTOR(xdr_longlong_t, long long)
XDR_INTERCEPTOR(xdr_u_longlong_t, unsigned long long)
XDR_INTERCEPTOR(xdr_int8_t, u8)
XDR_INTERCEPTOR(xdr_uint8_t, u8)
XDR_INTERCEPTOR(xdr_int16_t, u16)
XDR_INTERCEPTOR(xdr_uint16_t, u16)
XDR_INTERCEPTOR(xdr_int32_t, u32)
XDR_INTERCEPTOR(xdr_uint32_t, u32)
XDR_INTERCEPTOR(xdr_int64_t, u64)
XDR_INTERCEPTOR(xdr_uint64_t, u64)
XDR_INTERCEPTOR(xdr_quad_t, long long)
XDR_INTERCEPTOR(xdr_u_quad_t, unsigned long long)
XDR_INTERCEPTOR(xdr_bool, bool)
XDR_INTERCEPTOR(xdr_enum, int)
XDR_INTERCEPTOR(xdr_char, char)
XDR_INTERCEPTOR(xdr_u_char, unsigned char)
XDR_INTERCEPTOR(xdr_float, float)
XDR_INTERCEPTOR(xdr_double, double)

// FIXME: intercept xdr_array, opaque, union, vector, reference, pointer,
// wrapstring, sizeof

INTERCEPTOR(int, xdr_bytes, __sanitizer_XDR *xdrs, char **p, unsigned *sizep,
            unsigned maxsize) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, xdr_bytes, xdrs, p, sizep, maxsize);
  if (p && sizep && xdrs->x_op == __sanitizer_XDR_ENCODE) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, p, sizeof(*p));
    COMMON_INTERCEPTOR_READ_RANGE(ctx, sizep, sizeof(*sizep));
    COMMON_INTERCEPTOR_READ_RANGE(ctx, *p, *sizep);
  }
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(xdr_bytes)(xdrs, p, sizep, maxsize);
  if (p && sizep && xdrs->x_op == __sanitizer_XDR_DECODE) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, sizeof(*p));
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, sizep, sizeof(*sizep));
    if (res && *p && *sizep) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, *sizep);
  }
  return res;
}

INTERCEPTOR(int, xdr_string, __sanitizer_XDR *xdrs, char **p,
            unsigned maxsize) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, xdr_string, xdrs, p, maxsize);
  if (p && xdrs->x_op == __sanitizer_XDR_ENCODE) {
    COMMON_INTERCEPTOR_READ_RANGE(ctx, p, sizeof(*p));
    COMMON_INTERCEPTOR_READ_RANGE(ctx, *p, REAL(strlen)(*p) + 1);
  }
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  int res = REAL(xdr_string)(xdrs, p, maxsize);
  if (p && xdrs->x_op == __sanitizer_XDR_DECODE) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, p, sizeof(*p));
    if (res && *p)
      COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, REAL(strlen)(*p) + 1);
  }
  return res;
}

#define INIT_XDR                               \
  COMMON_INTERCEPT_FUNCTION(xdrmem_create);    \
  COMMON_INTERCEPT_FUNCTION(xdrstdio_create);  \
  COMMON_INTERCEPT_FUNCTION(xdr_short);        \
  COMMON_INTERCEPT_FUNCTION(xdr_u_short);      \
  COMMON_INTERCEPT_FUNCTION(xdr_int);          \
  COMMON_INTERCEPT_FUNCTION(xdr_u_int);        \
  COMMON_INTERCEPT_FUNCTION(xdr_long);         \
  COMMON_INTERCEPT_FUNCTION(xdr_u_long);       \
  COMMON_INTERCEPT_FUNCTION(xdr_hyper);        \
  COMMON_INTERCEPT_FUNCTION(xdr_u_hyper);      \
  COMMON_INTERCEPT_FUNCTION(xdr_longlong_t);   \
  COMMON_INTERCEPT_FUNCTION(xdr_u_longlong_t); \
  COMMON_INTERCEPT_FUNCTION(xdr_int8_t);       \
  COMMON_INTERCEPT_FUNCTION(xdr_uint8_t);      \
  COMMON_INTERCEPT_FUNCTION(xdr_int16_t);      \
  COMMON_INTERCEPT_FUNCTION(xdr_uint16_t);     \
  COMMON_INTERCEPT_FUNCTION(xdr_int32_t);      \
  COMMON_INTERCEPT_FUNCTION(xdr_uint32_t);     \
  COMMON_INTERCEPT_FUNCTION(xdr_int64_t);      \
  COMMON_INTERCEPT_FUNCTION(xdr_uint64_t);     \
  COMMON_INTERCEPT_FUNCTION(xdr_quad_t);       \
  COMMON_INTERCEPT_FUNCTION(xdr_u_quad_t);     \
  COMMON_INTERCEPT_FUNCTION(xdr_bool);         \
  COMMON_INTERCEPT_FUNCTION(xdr_enum);         \
  COMMON_INTERCEPT_FUNCTION(xdr_char);         \
  COMMON_INTERCEPT_FUNCTION(xdr_u_char);       \
  COMMON_INTERCEPT_FUNCTION(xdr_float);        \
  COMMON_INTERCEPT_FUNCTION(xdr_double);       \
  COMMON_INTERCEPT_FUNCTION(xdr_bytes);        \
  COMMON_INTERCEPT_FUNCTION(xdr_string);
#else
#define INIT_XDR
#endif  // SANITIZER_INTERCEPT_XDR

#if SANITIZER_INTERCEPT_TSEARCH
INTERCEPTOR(void *, tsearch, void *key, void **rootp,
            int (*compar)(const void *, const void *)) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, tsearch, key, rootp, compar);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  void *res = REAL(tsearch)(key, rootp, compar);
  if (res && *(void **)res == key)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, sizeof(void *));
  return res;
}
#define INIT_TSEARCH COMMON_INTERCEPT_FUNCTION(tsearch);
#else
#define INIT_TSEARCH
#endif

#if SANITIZER_INTERCEPT_LIBIO_INTERNALS || SANITIZER_INTERCEPT_FOPEN || \
    SANITIZER_INTERCEPT_OPEN_MEMSTREAM
void unpoison_file(__sanitizer_FILE *fp) {
#if SANITIZER_HAS_STRUCT_FILE
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(fp, sizeof(*fp));
  if (fp->_IO_read_base && fp->_IO_read_base < fp->_IO_read_end)
    COMMON_INTERCEPTOR_INITIALIZE_RANGE(fp->_IO_read_base,
                                        fp->_IO_read_end - fp->_IO_read_base);
#endif  // SANITIZER_HAS_STRUCT_FILE
}
#endif

#if SANITIZER_INTERCEPT_LIBIO_INTERNALS
// These guys are called when a .c source is built with -O2.
INTERCEPTOR(int, __uflow, __sanitizer_FILE *fp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, __uflow, fp);
  int res = REAL(__uflow)(fp);
  unpoison_file(fp);
  return res;
}
INTERCEPTOR(int, __underflow, __sanitizer_FILE *fp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, __underflow, fp);
  int res = REAL(__underflow)(fp);
  unpoison_file(fp);
  return res;
}
INTERCEPTOR(int, __overflow, __sanitizer_FILE *fp, int ch) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, __overflow, fp, ch);
  int res = REAL(__overflow)(fp, ch);
  unpoison_file(fp);
  return res;
}
INTERCEPTOR(int, __wuflow, __sanitizer_FILE *fp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, __wuflow, fp);
  int res = REAL(__wuflow)(fp);
  unpoison_file(fp);
  return res;
}
INTERCEPTOR(int, __wunderflow, __sanitizer_FILE *fp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, __wunderflow, fp);
  int res = REAL(__wunderflow)(fp);
  unpoison_file(fp);
  return res;
}
INTERCEPTOR(int, __woverflow, __sanitizer_FILE *fp, int ch) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, __woverflow, fp, ch);
  int res = REAL(__woverflow)(fp, ch);
  unpoison_file(fp);
  return res;
}
#define INIT_LIBIO_INTERNALS               \
  COMMON_INTERCEPT_FUNCTION(__uflow);      \
  COMMON_INTERCEPT_FUNCTION(__underflow);  \
  COMMON_INTERCEPT_FUNCTION(__overflow);   \
  COMMON_INTERCEPT_FUNCTION(__wuflow);     \
  COMMON_INTERCEPT_FUNCTION(__wunderflow); \
  COMMON_INTERCEPT_FUNCTION(__woverflow);
#else
#define INIT_LIBIO_INTERNALS
#endif

#if SANITIZER_INTERCEPT_FOPEN
INTERCEPTOR(__sanitizer_FILE *, fopen, const char *path, const char *mode) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fopen, path, mode);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, REAL(strlen)(mode) + 1);
  __sanitizer_FILE *res = REAL(fopen)(path, mode);
  COMMON_INTERCEPTOR_FILE_OPEN(ctx, res, path);
  if (res) unpoison_file(res);
  return res;
}
INTERCEPTOR(__sanitizer_FILE *, fdopen, int fd, const char *mode) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fdopen, fd, mode);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, REAL(strlen)(mode) + 1);
  __sanitizer_FILE *res = REAL(fdopen)(fd, mode);
  if (res) unpoison_file(res);
  return res;
}
INTERCEPTOR(__sanitizer_FILE *, freopen, const char *path, const char *mode,
            __sanitizer_FILE *fp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, freopen, path, mode, fp);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, REAL(strlen)(mode) + 1);
  COMMON_INTERCEPTOR_FILE_CLOSE(ctx, fp);
  __sanitizer_FILE *res = REAL(freopen)(path, mode, fp);
  COMMON_INTERCEPTOR_FILE_OPEN(ctx, res, path);
  if (res) unpoison_file(res);
  return res;
}
#define INIT_FOPEN                   \
  COMMON_INTERCEPT_FUNCTION(fopen);  \
  COMMON_INTERCEPT_FUNCTION(fdopen); \
  COMMON_INTERCEPT_FUNCTION(freopen);
#else
#define INIT_FOPEN
#endif

#if SANITIZER_INTERCEPT_FOPEN64
INTERCEPTOR(__sanitizer_FILE *, fopen64, const char *path, const char *mode) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fopen64, path, mode);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, REAL(strlen)(mode) + 1);
  __sanitizer_FILE *res = REAL(fopen64)(path, mode);
  COMMON_INTERCEPTOR_FILE_OPEN(ctx, res, path);
  if (res) unpoison_file(res);
  return res;
}
INTERCEPTOR(__sanitizer_FILE *, freopen64, const char *path, const char *mode,
            __sanitizer_FILE *fp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, freopen64, path, mode, fp);
  if (path) COMMON_INTERCEPTOR_READ_RANGE(ctx, path, REAL(strlen)(path) + 1);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, mode, REAL(strlen)(mode) + 1);
  COMMON_INTERCEPTOR_FILE_CLOSE(ctx, fp);
  __sanitizer_FILE *res = REAL(freopen64)(path, mode, fp);
  COMMON_INTERCEPTOR_FILE_OPEN(ctx, res, path);
  if (res) unpoison_file(res);
  return res;
}
#define INIT_FOPEN64                  \
  COMMON_INTERCEPT_FUNCTION(fopen64); \
  COMMON_INTERCEPT_FUNCTION(freopen64);
#else
#define INIT_FOPEN64
#endif

#if SANITIZER_INTERCEPT_OPEN_MEMSTREAM
INTERCEPTOR(__sanitizer_FILE *, open_memstream, char **ptr, SIZE_T *sizeloc) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, open_memstream, ptr, sizeloc);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  __sanitizer_FILE *res = REAL(open_memstream)(ptr, sizeloc);
  if (res) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, sizeof(*ptr));
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, sizeloc, sizeof(*sizeloc));
    unpoison_file(res);
    FileMetadata file = {ptr, sizeloc};
    SetInterceptorMetadata(res, file);
  }
  return res;
}
INTERCEPTOR(__sanitizer_FILE *, open_wmemstream, wchar_t **ptr,
            SIZE_T *sizeloc) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, open_wmemstream, ptr, sizeloc);
  __sanitizer_FILE *res = REAL(open_wmemstream)(ptr, sizeloc);
  if (res) {
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, sizeof(*ptr));
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, sizeloc, sizeof(*sizeloc));
    unpoison_file(res);
    FileMetadata file = {(char **)ptr, sizeloc};
    SetInterceptorMetadata(res, file);
  }
  return res;
}
INTERCEPTOR(__sanitizer_FILE *, fmemopen, void *buf, SIZE_T size,
            const char *mode) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fmemopen, buf, size, mode);
  // FIXME: under ASan the call below may write to freed memory and corrupt
  // its metadata. See
  // https://code.google.com/p/address-sanitizer/issues/detail?id=321.
  __sanitizer_FILE *res = REAL(fmemopen)(buf, size, mode);
  if (res) unpoison_file(res);
  return res;
}
#define INIT_OPEN_MEMSTREAM                   \
  COMMON_INTERCEPT_FUNCTION(open_memstream);  \
  COMMON_INTERCEPT_FUNCTION(open_wmemstream); \
  COMMON_INTERCEPT_FUNCTION(fmemopen);
#else
#define INIT_OPEN_MEMSTREAM
#endif

#if SANITIZER_INTERCEPT_OBSTACK
static void initialize_obstack(__sanitizer_obstack *obstack) {
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(obstack, sizeof(*obstack));
  if (obstack->chunk)
    COMMON_INTERCEPTOR_INITIALIZE_RANGE(obstack->chunk,
                                        sizeof(*obstack->chunk));
}

INTERCEPTOR(int, _obstack_begin_1, __sanitizer_obstack *obstack, int sz,
            int align, void *(*alloc_fn)(uptr arg, uptr sz),
            void (*free_fn)(uptr arg, void *p)) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, _obstack_begin_1, obstack, sz, align, alloc_fn,
                           free_fn);
  int res = REAL(_obstack_begin_1)(obstack, sz, align, alloc_fn, free_fn);
  if (res) initialize_obstack(obstack);
  return res;
}
INTERCEPTOR(int, _obstack_begin, __sanitizer_obstack *obstack, int sz,
            int align, void *(*alloc_fn)(uptr sz), void (*free_fn)(void *p)) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, _obstack_begin, obstack, sz, align, alloc_fn,
                           free_fn);
  int res = REAL(_obstack_begin)(obstack, sz, align, alloc_fn, free_fn);
  if (res) initialize_obstack(obstack);
  return res;
}
INTERCEPTOR(void, _obstack_newchunk, __sanitizer_obstack *obstack, int length) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, _obstack_newchunk, obstack, length);
  REAL(_obstack_newchunk)(obstack, length);
  if (obstack->chunk)
    COMMON_INTERCEPTOR_INITIALIZE_RANGE(
        obstack->chunk, obstack->next_free - (char *)obstack->chunk);
}
#define INIT_OBSTACK                           \
  COMMON_INTERCEPT_FUNCTION(_obstack_begin_1); \
  COMMON_INTERCEPT_FUNCTION(_obstack_begin);   \
  COMMON_INTERCEPT_FUNCTION(_obstack_newchunk);
#else
#define INIT_OBSTACK
#endif

#if SANITIZER_INTERCEPT_FFLUSH
INTERCEPTOR(int, fflush, __sanitizer_FILE *fp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fflush, fp);
  int res = REAL(fflush)(fp);
  // FIXME: handle fp == NULL
  if (fp) {
    const FileMetadata *m = GetInterceptorMetadata(fp);
    if (m) COMMON_INTERCEPTOR_INITIALIZE_RANGE(*m->addr, *m->size);
  }
  return res;
}
#define INIT_FFLUSH COMMON_INTERCEPT_FUNCTION(fflush);
#else
#define INIT_FFLUSH
#endif

#if SANITIZER_INTERCEPT_FCLOSE
INTERCEPTOR(int, fclose, __sanitizer_FILE *fp) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fclose, fp);
  COMMON_INTERCEPTOR_FILE_CLOSE(ctx, fp);
  const FileMetadata *m = GetInterceptorMetadata(fp);
  int res = REAL(fclose)(fp);
  if (m) {
    COMMON_INTERCEPTOR_INITIALIZE_RANGE(*m->addr, *m->size);
    DeleteInterceptorMetadata(fp);
  }
  return res;
}
#define INIT_FCLOSE COMMON_INTERCEPT_FUNCTION(fclose);
#else
#define INIT_FCLOSE
#endif

#if SANITIZER_INTERCEPT_DLOPEN_DLCLOSE
INTERCEPTOR(void*, dlopen, const char *filename, int flag) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER_NOIGNORE(ctx, dlopen, filename, flag);
  if (filename) COMMON_INTERCEPTOR_READ_STRING(ctx, filename, 0);
  COMMON_INTERCEPTOR_ON_DLOPEN(filename, flag);
  void *res = REAL(dlopen)(filename, flag);
  COMMON_INTERCEPTOR_LIBRARY_LOADED(filename, res);
  return res;
}

INTERCEPTOR(int, dlclose, void *handle) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER_NOIGNORE(ctx, dlclose, handle);
  int res = REAL(dlclose)(handle);
  COMMON_INTERCEPTOR_LIBRARY_UNLOADED();
  return res;
}
#define INIT_DLOPEN_DLCLOSE          \
  COMMON_INTERCEPT_FUNCTION(dlopen); \
  COMMON_INTERCEPT_FUNCTION(dlclose);
#else
#define INIT_DLOPEN_DLCLOSE
#endif

#if SANITIZER_INTERCEPT_GETPASS
INTERCEPTOR(char *, getpass, const char *prompt) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, getpass, prompt);
  if (prompt)
    COMMON_INTERCEPTOR_READ_RANGE(ctx, prompt, REAL(strlen)(prompt)+1);
  char *res = REAL(getpass)(prompt);
  if (res) COMMON_INTERCEPTOR_INITIALIZE_RANGE(res, REAL(strlen)(res)+1);
  return res;
}

#define INIT_GETPASS COMMON_INTERCEPT_FUNCTION(getpass);
#else
#define INIT_GETPASS
#endif

#if SANITIZER_INTERCEPT_TIMERFD
INTERCEPTOR(int, timerfd_settime, int fd, int flags, void *new_value,
            void *old_value) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, timerfd_settime, fd, flags, new_value,
                           old_value);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, new_value, struct_itimerspec_sz);
  int res = REAL(timerfd_settime)(fd, flags, new_value, old_value);
  if (res != -1 && old_value)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, old_value, struct_itimerspec_sz);
  return res;
}

INTERCEPTOR(int, timerfd_gettime, int fd, void *curr_value) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, timerfd_gettime, fd, curr_value);
  int res = REAL(timerfd_gettime)(fd, curr_value);
  if (res != -1 && curr_value)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, curr_value, struct_itimerspec_sz);
  return res;
}
#define INIT_TIMERFD                          \
  COMMON_INTERCEPT_FUNCTION(timerfd_settime); \
  COMMON_INTERCEPT_FUNCTION(timerfd_gettime);
#else
#define INIT_TIMERFD
#endif

#if SANITIZER_INTERCEPT_MLOCKX
// Linux kernel has a bug that leads to kernel deadlock if a process
// maps TBs of memory and then calls mlock().
static void MlockIsUnsupported() {
  static atomic_uint8_t printed;
  if (atomic_exchange(&printed, 1, memory_order_relaxed))
    return;
  VPrintf(1, "%s ignores mlock/mlockall/munlock/munlockall\n",
          SanitizerToolName);
}

INTERCEPTOR(int, mlock, const void *addr, uptr len) {
  MlockIsUnsupported();
  return 0;
}

INTERCEPTOR(int, munlock, const void *addr, uptr len) {
  MlockIsUnsupported();
  return 0;
}

INTERCEPTOR(int, mlockall, int flags) {
  MlockIsUnsupported();
  return 0;
}

INTERCEPTOR(int, munlockall, void) {
  MlockIsUnsupported();
  return 0;
}

#define INIT_MLOCKX                                                            \
  COMMON_INTERCEPT_FUNCTION(mlock);                                            \
  COMMON_INTERCEPT_FUNCTION(munlock);                                          \
  COMMON_INTERCEPT_FUNCTION(mlockall);                                         \
  COMMON_INTERCEPT_FUNCTION(munlockall);

#else
#define INIT_MLOCKX
#endif  // SANITIZER_INTERCEPT_MLOCKX

#if SANITIZER_INTERCEPT_FOPENCOOKIE
struct WrappedCookie {
  void *real_cookie;
  __sanitizer_cookie_io_functions_t real_io_funcs;
};

static uptr wrapped_read(void *cookie, char *buf, uptr size) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(3);
  WrappedCookie *wrapped_cookie = (WrappedCookie *)cookie;
  __sanitizer_cookie_io_read real_read = wrapped_cookie->real_io_funcs.read;
  return real_read ? real_read(wrapped_cookie->real_cookie, buf, size) : 0;
}

static uptr wrapped_write(void *cookie, const char *buf, uptr size) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(3);
  WrappedCookie *wrapped_cookie = (WrappedCookie *)cookie;
  __sanitizer_cookie_io_write real_write = wrapped_cookie->real_io_funcs.write;
  return real_write ? real_write(wrapped_cookie->real_cookie, buf, size) : size;
}

static int wrapped_seek(void *cookie, u64 *offset, int whence) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(3);
  COMMON_INTERCEPTOR_INITIALIZE_RANGE(offset, sizeof(*offset));
  WrappedCookie *wrapped_cookie = (WrappedCookie *)cookie;
  __sanitizer_cookie_io_seek real_seek = wrapped_cookie->real_io_funcs.seek;
  return real_seek ? real_seek(wrapped_cookie->real_cookie, offset, whence)
                   : -1;
}

static int wrapped_close(void *cookie) {
  COMMON_INTERCEPTOR_UNPOISON_PARAM(1);
  WrappedCookie *wrapped_cookie = (WrappedCookie *)cookie;
  __sanitizer_cookie_io_close real_close = wrapped_cookie->real_io_funcs.close;
  int res = real_close ? real_close(wrapped_cookie->real_cookie) : 0;
  InternalFree(wrapped_cookie);
  return res;
}

INTERCEPTOR(__sanitizer_FILE *, fopencookie, void *cookie, const char *mode,
            __sanitizer_cookie_io_functions_t io_funcs) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, fopencookie, cookie, mode, io_funcs);
  WrappedCookie *wrapped_cookie =
      (WrappedCookie *)InternalAlloc(sizeof(WrappedCookie));
  wrapped_cookie->real_cookie = cookie;
  wrapped_cookie->real_io_funcs = io_funcs;
  __sanitizer_FILE *res =
      REAL(fopencookie)(wrapped_cookie, mode, {wrapped_read, wrapped_write,
                                               wrapped_seek, wrapped_close});
  return res;
}

#define INIT_FOPENCOOKIE COMMON_INTERCEPT_FUNCTION(fopencookie);
#else
#define INIT_FOPENCOOKIE
#endif  // SANITIZER_INTERCEPT_FOPENCOOKIE

#if SANITIZER_INTERCEPT_SEM
INTERCEPTOR(int, sem_init, __sanitizer_sem_t *s, int pshared, unsigned value) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sem_init, s, pshared, value);
  // Workaround a bug in glibc's "old" semaphore implementation by
  // zero-initializing the sem_t contents. This has to be done here because
  // interceptors bind to the lowest symbols version by default, hitting the
  // buggy code path while the non-sanitized build of the same code works fine.
  REAL(memset)(s, 0, sizeof(*s));
  int res = REAL(sem_init)(s, pshared, value);
  return res;
}

INTERCEPTOR(int, sem_destroy, __sanitizer_sem_t *s) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sem_destroy, s);
  int res = REAL(sem_destroy)(s);
  return res;
}

INTERCEPTOR(int, sem_wait, __sanitizer_sem_t *s) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sem_wait, s);
  int res = COMMON_INTERCEPTOR_BLOCK_REAL(sem_wait)(s);
  if (res == 0) {
    COMMON_INTERCEPTOR_ACQUIRE(ctx, (uptr)s);
  }
  return res;
}

INTERCEPTOR(int, sem_trywait, __sanitizer_sem_t *s) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sem_trywait, s);
  int res = COMMON_INTERCEPTOR_BLOCK_REAL(sem_trywait)(s);
  if (res == 0) {
    COMMON_INTERCEPTOR_ACQUIRE(ctx, (uptr)s);
  }
  return res;
}

INTERCEPTOR(int, sem_timedwait, __sanitizer_sem_t *s, void *abstime) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sem_timedwait, s, abstime);
  COMMON_INTERCEPTOR_READ_RANGE(ctx, abstime, struct_timespec_sz);
  int res = COMMON_INTERCEPTOR_BLOCK_REAL(sem_timedwait)(s, abstime);
  if (res == 0) {
    COMMON_INTERCEPTOR_ACQUIRE(ctx, (uptr)s);
  }
  return res;
}

INTERCEPTOR(int, sem_post, __sanitizer_sem_t *s) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sem_post, s);
  COMMON_INTERCEPTOR_RELEASE(ctx, (uptr)s);
  int res = REAL(sem_post)(s);
  return res;
}

INTERCEPTOR(int, sem_getvalue, __sanitizer_sem_t *s, int *sval) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, sem_getvalue, s, sval);
  int res = REAL(sem_getvalue)(s, sval);
  if (res == 0) {
    COMMON_INTERCEPTOR_ACQUIRE(ctx, (uptr)s);
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, sval, sizeof(*sval));
  }
  return res;
}
#define INIT_SEM                                                               \
  COMMON_INTERCEPT_FUNCTION(sem_init);                                         \
  COMMON_INTERCEPT_FUNCTION(sem_destroy);                                      \
  COMMON_INTERCEPT_FUNCTION(sem_wait);                                         \
  COMMON_INTERCEPT_FUNCTION(sem_trywait);                                      \
  COMMON_INTERCEPT_FUNCTION(sem_timedwait);                                    \
  COMMON_INTERCEPT_FUNCTION(sem_post);                                         \
  COMMON_INTERCEPT_FUNCTION(sem_getvalue);
#else
#define INIT_SEM
#endif // SANITIZER_INTERCEPT_SEM

#if SANITIZER_INTERCEPT_PTHREAD_SETCANCEL
INTERCEPTOR(int, pthread_setcancelstate, int state, int *oldstate) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pthread_setcancelstate, state, oldstate);
  int res = REAL(pthread_setcancelstate)(state, oldstate);
  if (res == 0)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, oldstate, sizeof(*oldstate));
  return res;
}

INTERCEPTOR(int, pthread_setcanceltype, int type, int *oldtype) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, pthread_setcanceltype, type, oldtype);
  int res = REAL(pthread_setcanceltype)(type, oldtype);
  if (res == 0)
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, oldtype, sizeof(*oldtype));
  return res;
}
#define INIT_PTHREAD_SETCANCEL                                                 \
  COMMON_INTERCEPT_FUNCTION(pthread_setcancelstate);                           \
  COMMON_INTERCEPT_FUNCTION(pthread_setcanceltype);
#else
#define INIT_PTHREAD_SETCANCEL
#endif

#if SANITIZER_INTERCEPT_MINCORE
INTERCEPTOR(int, mincore, void *addr, uptr length, unsigned char *vec) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, mincore, addr, length, vec);
  int res = REAL(mincore)(addr, length, vec);
  if (res == 0) {
    uptr page_size = GetPageSizeCached();
    uptr vec_size = ((length + page_size - 1) & (~(page_size - 1))) / page_size;
    COMMON_INTERCEPTOR_WRITE_RANGE(ctx, vec, vec_size);
  }
  return res;
}
#define INIT_MINCORE COMMON_INTERCEPT_FUNCTION(mincore);
#else
#define INIT_MINCORE
#endif

#if SANITIZER_INTERCEPT_PROCESS_VM_READV
INTERCEPTOR(SSIZE_T, process_vm_readv, int pid, __sanitizer_iovec *local_iov,
            uptr liovcnt, __sanitizer_iovec *remote_iov, uptr riovcnt,
            uptr flags) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, process_vm_readv, pid, local_iov, liovcnt,
                           remote_iov, riovcnt, flags);
  SSIZE_T res = REAL(process_vm_readv)(pid, local_iov, liovcnt, remote_iov,
                                       riovcnt, flags);
  if (res > 0)
    write_iovec(ctx, local_iov, liovcnt, res);
  return res;
}

INTERCEPTOR(SSIZE_T, process_vm_writev, int pid, __sanitizer_iovec *local_iov,
            uptr liovcnt, __sanitizer_iovec *remote_iov, uptr riovcnt,
            uptr flags) {
  void *ctx;
  COMMON_INTERCEPTOR_ENTER(ctx, process_vm_writev, pid, local_iov, liovcnt,
                           remote_iov, riovcnt, flags);
  SSIZE_T res = REAL(process_vm_writev)(pid, local_iov, liovcnt, remote_iov,
                                        riovcnt, flags);
  if (res > 0)
    read_iovec(ctx, local_iov, liovcnt, res);
  return res;
}
#define INIT_PROCESS_VM_READV                                                  \
  COMMON_INTERCEPT_FUNCTION(process_vm_readv);                                 \
  COMMON_INTERCEPT_FUNCTION(process_vm_writev);
#else
#define INIT_PROCESS_VM_READV
#endif

static void InitializeCommonInterceptors() {
  static u64 metadata_mem[sizeof(MetadataHashMap) / sizeof(u64) + 1];
  interceptor_metadata_map = new((void *)&metadata_mem) MetadataHashMap();

  INIT_TEXTDOMAIN;
  INIT_STRCMP;
  INIT_STRNCMP;
  INIT_STRCASECMP;
  INIT_STRNCASECMP;
  INIT_STRSTR;
  INIT_STRCASESTR;
  INIT_STRSPN;
  INIT_STRPBRK;
  INIT_MEMCHR;
  INIT_MEMCMP;
  INIT_MEMRCHR;
  INIT_READ;
  INIT_PREAD;
  INIT_PREAD64;
  INIT_READV;
  INIT_PREADV;
  INIT_PREADV64;
  INIT_WRITE;
  INIT_PWRITE;
  INIT_PWRITE64;
  INIT_WRITEV;
  INIT_PWRITEV;
  INIT_PWRITEV64;
  INIT_PRCTL;
  INIT_LOCALTIME_AND_FRIENDS;
  INIT_STRPTIME;
  INIT_SCANF;
  INIT_ISOC99_SCANF;
  INIT_PRINTF;
  INIT_PRINTF_L;
  INIT_ISOC99_PRINTF;
  INIT_FREXP;
  INIT_FREXPF_FREXPL;
  INIT_GETPWNAM_AND_FRIENDS;
  INIT_GETPWNAM_R_AND_FRIENDS;
  INIT_GETPWENT;
  INIT_FGETPWENT;
  INIT_GETPWENT_R;
  INIT_SETPWENT;
  INIT_CLOCK_GETTIME;
  INIT_GETITIMER;
  INIT_TIME;
  INIT_GLOB;
  INIT_WAIT;
  INIT_WAIT4;
  INIT_INET;
  INIT_PTHREAD_GETSCHEDPARAM;
  INIT_GETADDRINFO;
  INIT_GETNAMEINFO;
  INIT_GETSOCKNAME;
  INIT_GETHOSTBYNAME;
  INIT_GETHOSTBYNAME_R;
  INIT_GETHOSTBYNAME2_R;
  INIT_GETHOSTBYADDR_R;
  INIT_GETHOSTENT_R;
  INIT_GETSOCKOPT;
  INIT_ACCEPT;
  INIT_ACCEPT4;
  INIT_MODF;
  INIT_RECVMSG;
  INIT_GETPEERNAME;
  INIT_IOCTL;
  INIT_INET_ATON;
  INIT_SYSINFO;
  INIT_READDIR;
  INIT_READDIR64;
  INIT_PTRACE;
  INIT_SETLOCALE;
  INIT_GETCWD;
  INIT_GET_CURRENT_DIR_NAME;
  INIT_STRTOIMAX;
  INIT_MBSTOWCS;
  INIT_MBSNRTOWCS;
  INIT_WCSTOMBS;
  INIT_WCSNRTOMBS;
  INIT_WCRTOMB;
  INIT_TCGETATTR;
  INIT_REALPATH;
  INIT_CANONICALIZE_FILE_NAME;
  INIT_CONFSTR;
  INIT_SCHED_GETAFFINITY;
  INIT_SCHED_GETPARAM;
  INIT_STRERROR;
  INIT_STRERROR_R;
  INIT_XPG_STRERROR_R;
  INIT_SCANDIR;
  INIT_SCANDIR64;
  INIT_GETGROUPS;
  INIT_POLL;
  INIT_PPOLL;
  INIT_WORDEXP;
  INIT_SIGWAIT;
  INIT_SIGWAITINFO;
  INIT_SIGTIMEDWAIT;
  INIT_SIGSETOPS;
  INIT_SIGPENDING;
  INIT_SIGPROCMASK;
  INIT_BACKTRACE;
  INIT__EXIT;
  INIT_PTHREAD_MUTEX_LOCK;
  INIT_PTHREAD_MUTEX_UNLOCK;
  INIT_GETMNTENT;
  INIT_GETMNTENT_R;
  INIT_STATFS;
  INIT_STATFS64;
  INIT_STATVFS;
  INIT_STATVFS64;
  INIT_INITGROUPS;
  INIT_ETHER_NTOA_ATON;
  INIT_ETHER_HOST;
  INIT_ETHER_R;
  INIT_SHMCTL;
  INIT_RANDOM_R;
  INIT_PTHREAD_ATTR_GET;
  INIT_PTHREAD_ATTR_GETINHERITSCHED;
  INIT_PTHREAD_ATTR_GETAFFINITY_NP;
  INIT_PTHREAD_MUTEXATTR_GETPSHARED;
  INIT_PTHREAD_MUTEXATTR_GETTYPE;
  INIT_PTHREAD_MUTEXATTR_GETPROTOCOL;
  INIT_PTHREAD_MUTEXATTR_GETPRIOCEILING;
  INIT_PTHREAD_MUTEXATTR_GETROBUST;
  INIT_PTHREAD_MUTEXATTR_GETROBUST_NP;
  INIT_PTHREAD_RWLOCKATTR_GETPSHARED;
  INIT_PTHREAD_RWLOCKATTR_GETKIND_NP;
  INIT_PTHREAD_CONDATTR_GETPSHARED;
  INIT_PTHREAD_CONDATTR_GETCLOCK;
  INIT_PTHREAD_BARRIERATTR_GETPSHARED;
  INIT_TMPNAM;
  INIT_TMPNAM_R;
  INIT_TEMPNAM;
  INIT_PTHREAD_SETNAME_NP;
  INIT_SINCOS;
  INIT_REMQUO;
  INIT_LGAMMA;
  INIT_LGAMMA_R;
  INIT_LGAMMAL_R;
  INIT_DRAND48_R;
  INIT_RAND_R;
  INIT_GETLINE;
  INIT_ICONV;
  INIT_TIMES;
  INIT_TLS_GET_ADDR;
  INIT_LISTXATTR;
  INIT_GETXATTR;
  INIT_GETRESID;
  INIT_GETIFADDRS;
  INIT_IF_INDEXTONAME;
  INIT_CAPGET;
  INIT_AEABI_MEM;
  INIT___BZERO;
  INIT_FTIME;
  INIT_XDR;
  INIT_TSEARCH;
  INIT_LIBIO_INTERNALS;
  INIT_FOPEN;
  INIT_FOPEN64;
  INIT_OPEN_MEMSTREAM;
  INIT_OBSTACK;
  INIT_FFLUSH;
  INIT_FCLOSE;
  INIT_DLOPEN_DLCLOSE;
  INIT_GETPASS;
  INIT_TIMERFD;
  INIT_MLOCKX;
  INIT_FOPENCOOKIE;
  INIT_SEM;
  INIT_PTHREAD_SETCANCEL;
  INIT_MINCORE;
  INIT_PROCESS_VM_READV;
}
