Google Git
Sign in
llvm / llvm-project / c8f2139eb0de70eec16901d2a7ddfdec62659685 / . / compiler-rt / lib / sanitizer_common / sanitizer_common_interceptors.inc
blob: abb38ccfa15d21740b466dc17b80031e1211257c [file] [log] [blame]
//===-- sanitizer_common_interceptors.inc -----------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// 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 its 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_PRE_LOCK
// COMMON_INTERCEPTOR_MUTEX_POST_LOCK
// COMMON_INTERCEPTOR_MUTEX_UNLOCK
// COMMON_INTERCEPTOR_MUTEX_REPAIR
// COMMON_INTERCEPTOR_SET_PTHREAD_NAME
// COMMON_INTERCEPTOR_HANDLE_RECVMSG
// COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED
// COMMON_INTERCEPTOR_MEMSET_IMPL
// COMMON_INTERCEPTOR_MEMMOVE_IMPL
// COMMON_INTERCEPTOR_MEMCPY_IMPL
// COMMON_INTERCEPTOR_MMAP_IMPL
// COMMON_INTERCEPTOR_COPY_STRING
// COMMON_INTERCEPTOR_STRNDUP_IMPL
// COMMON_INTERCEPTOR_STRERROR
//===----------------------------------------------------------------------===//
#include "interception/interception.h"
#include "sanitizer_addrhashmap.h"
#include "sanitizer_errno.h"
#include "sanitizer_placement_new.h"
#include "sanitizer_platform_interceptors.h"
#include "sanitizer_symbolizer.h"
#include "sanitizer_tls_get_addr.h"
#include <stdarg.h>
#if SANITIZER_INTERCEPTOR_HOOKS
#define CALL_WEAK_INTERCEPTOR_HOOK(f, ...) f(__VA_ARGS__);
#define DECLARE_WEAK_INTERCEPTOR_HOOK(f, ...) \
SANITIZER_INTERFACE_WEAK_DEF(void, f, __VA_ARGS__) {}
#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
#if SANITIZER_NETBSD
#define clock_getres __clock_getres50
#define clock_gettime __clock_gettime50
#define clock_settime __clock_settime50
#define ctime __ctime50
#define ctime_r __ctime_r50
#define devname __devname50
#define fgetpos __fgetpos50
#define fsetpos __fsetpos50
#define fstatvfs __fstatvfs90
#define fstatvfs1 __fstatvfs190
#define fts_children __fts_children60
#define fts_close __fts_close60
#define fts_open __fts_open60
#define fts_read __fts_read60
#define fts_set __fts_set60
#define getitimer __getitimer50
#define getmntinfo __getmntinfo90
#define getpwent __getpwent50
#define getpwnam __getpwnam50
#define getpwnam_r __getpwnam_r50
#define getpwuid __getpwuid50
#define getpwuid_r __getpwuid_r50
#define getutent __getutent50
#define getutxent __getutxent50
#define getutxid __getutxid50
#define getutxline __getutxline50
#define getvfsstat __getvfsstat90
#define pututxline __pututxline50
#define glob __glob30
#define gmtime __gmtime50
#define gmtime_r __gmtime_r50
#define localtime __locatime50
#define localtime_r __localtime_r50
#define mktime __mktime50
#define lstat __lstat50
#define opendir __opendir30
#define readdir __readdir30
#define readdir_r __readdir_r30
#define scandir __scandir30
#define setitimer __setitimer50
#define setlocale __setlocale50
#define shmctl __shmctl50
#define sigaltstack __sigaltstack14
#define sigemptyset __sigemptyset14
#define sigfillset __sigfillset14
#define sigpending __sigpending14
#define sigprocmask __sigprocmask14
#define sigtimedwait __sigtimedwait50
#define stat __stat50
#define statvfs __statvfs90
#define statvfs1 __statvfs190
#define time __time50
#define times __times13
#define unvis __unvis50
#define wait3 __wait350
#define wait4 __wait450
extern const unsigned short *_ctype_tab_;
extern const short *_toupper_tab_;
extern const short *_tolower_tab_;
#endif
// Platform-specific options.
#if SANITIZER_MAC
#define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE 0
#elif SANITIZER_WINDOWS64
#define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE 0
#else
#define PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE 1
#endif // SANITIZER_MAC
#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_PRE_LOCK
#define COMMON_INTERCEPTOR_MUTEX_PRE_LOCK(ctx, m) {}
#endif
#ifndef COMMON_INTERCEPTOR_MUTEX_POST_LOCK
#define COMMON_INTERCEPTOR_MUTEX_POST_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_MUTEX_INVALID
#define COMMON_INTERCEPTOR_MUTEX_INVALID(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(ctx, s, n) \
COMMON_INTERCEPTOR_READ_RANGE((ctx), (s), \
common_flags()->strict_string_checks ? (internal_strlen(s)) + 1 : (n) )
#ifndef COMMON_INTERCEPTOR_ON_DLOPEN
#define COMMON_INTERCEPTOR_ON_DLOPEN(filename, flag) \
CheckNoDeepBind(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
#ifndef COMMON_INTERCEPTOR_USER_CALLBACK_START
#define COMMON_INTERCEPTOR_USER_CALLBACK_START() {}
#endif
#ifndef COMMON_INTERCEPTOR_USER_CALLBACK_END
#define COMMON_INTERCEPTOR_USER_CALLBACK_END() {}
#endif
#ifdef SANITIZER_NLDBL_VERSION
#define COMMON_INTERCEPT_FUNCTION_LDBL(fn) \
COMMON_INTERCEPT_FUNCTION_VER(fn, SANITIZER_NLDBL_VERSION)
#else
#define COMMON_INTERCEPT_FUNCTION_LDBL(fn) \
COMMON_INTERCEPT_FUNCTION(fn)
#endif
#if SANITIZER_GLIBC
// If we could not find the versioned symbol, fall back to an unversioned
// lookup. This is needed to work around a GLibc bug that causes dlsym
// with RTLD_NEXT to return the oldest versioned symbol.
// See https://sourceware.org/bugzilla/show_bug.cgi?id=14932.
// For certain symbols (e.g. regexec) we have to perform a versioned lookup,
// but that versioned symbol will only exist for architectures where the
// oldest Glibc version pre-dates support for that architecture.
// For example, regexec@GLIBC_2.3.4 exists on x86_64, but not RISC-V.
// See also https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98920.
#define COMMON_INTERCEPT_FUNCTION_GLIBC_VER_MIN(fn, ver) \
COMMON_INTERCEPT_FUNCTION_VER_UNVERSIONED_FALLBACK(fn, ver)
#else
#define COMMON_INTERCEPT_FUNCTION_GLIBC_VER_MIN(fn, ver) \
COMMON_INTERCEPT_FUNCTION(fn)
#endif
#ifndef COMMON_INTERCEPTOR_MEMSET_IMPL
#define COMMON_INTERCEPTOR_MEMSET_IMPL(ctx, dst, v, size) \
{ \
if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED) \
return internal_memset(dst, v, size); \
COMMON_INTERCEPTOR_ENTER(ctx, memset, dst, v, size); \
if (common_flags()->intercept_intrin) \
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, size); \
return REAL(memset)(dst, v, size); \
}
#endif
#ifndef COMMON_INTERCEPTOR_MEMMOVE_IMPL
#define COMMON_INTERCEPTOR_MEMMOVE_IMPL(ctx, dst, src, size) \
{ \
if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED) \
return internal_memmove(dst, src, size); \
COMMON_INTERCEPTOR_ENTER(ctx, memmove, dst, src, size); \
if (common_flags()->intercept_intrin) { \
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, size); \
COMMON_INTERCEPTOR_READ_RANGE(ctx, src, size); \
} \
return REAL(memmove)(dst, src, size); \
}
#endif
#ifndef COMMON_INTERCEPTOR_MEMCPY_IMPL
#define COMMON_INTERCEPTOR_MEMCPY_IMPL(ctx, dst, src, size) \
{ \
if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED) { \
return internal_memmove(dst, src, size); \
} \
COMMON_INTERCEPTOR_ENTER(ctx, memcpy, dst, src, size); \
if (common_flags()->intercept_intrin) { \
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, dst, size); \
COMMON_INTERCEPTOR_READ_RANGE(ctx, src, size); \
} \
return REAL(memcpy)(dst, src, size); \
}
#endif
#ifndef COMMON_INTERCEPTOR_MMAP_IMPL
#define COMMON_INTERCEPTOR_MMAP_IMPL(ctx, mmap, addr, sz, prot, flags, fd, \
off) \
{ return REAL(mmap)(addr, sz, prot, flags, fd, off); }
#endif
#ifndef COMMON_INTERCEPTOR_COPY_STRING
#define COMMON_INTERCEPTOR_COPY_STRING(ctx, to, from, size) {}
#endif
#ifndef COMMON_INTERCEPTOR_STRNDUP_IMPL
#define COMMON_INTERCEPTOR_STRNDUP_IMPL(ctx, s, size) \
COMMON_INTERCEPTOR_ENTER(ctx, strndup, s, size); \
uptr copy_length = internal_strnlen(s, size); \
char *new_mem = (char *)WRAP(malloc)(copy_length + 1); \
if (common_flags()->intercept_strndup) { \
COMMON_INTERCEPTOR_READ_STRING(ctx, s, Min(size, copy_length + 1)); \
} \
COMMON_INTERCEPTOR_COPY_STRING(ctx, new_mem, s, copy_length); \
internal_memcpy(new_mem, s, copy_length); \
new_mem[copy_length] = '\0'; \
return new_mem;
#endif
#ifndef COMMON_INTERCEPTOR_STRERROR
#define COMMON_INTERCEPTOR_STRERROR() {}
#endif
struct FileMetadata {
// For open_memstream().
char **addr;
SIZE_T *size;
};
struct CommonInterceptorMetadata {
enum {
CIMT_INVALID = 0,
CIMT_FILE
} type;
union {
FileMetadata file;
};
};
#if SI_POSIX
typedef AddrHashMap<CommonInterceptorMetadata, 31051> MetadataHashMap;
static MetadataHashMap *interceptor_metadata_map;
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 (addr && 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_POSIX
#if SANITIZER_INTERCEPT_STRLEN
INTERCEPTOR(SIZE_T, strlen, const char *s) {
// Sometimes strlen is called prior to InitializeCommonInterceptors,
// in which case the REAL(strlen) typically used in
// COMMON_INTERCEPTOR_ENTER will fail. We use internal_strlen here
// to handle that.
if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)
return internal_strlen(s);
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, strlen, s);
SIZE_T result = REAL(strlen)(s);
if (common_flags()->intercept_strlen)
COMMON_INTERCEPTOR_READ_RANGE(ctx, s, result + 1);
return result;
}
#define INIT_STRLEN COMMON_INTERCEPT_FUNCTION(strlen)
#else
#define INIT_STRLEN
#endif
#if SANITIZER_INTERCEPT_STRNLEN
INTERCEPTOR(SIZE_T, strnlen, const char *s, SIZE_T maxlen) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, strnlen, s, maxlen);
SIZE_T length = REAL(strnlen)(s, maxlen);
if (common_flags()->intercept_strlen)
COMMON_INTERCEPTOR_READ_RANGE(ctx, s, Min(length + 1, maxlen));
return length;
}
#define INIT_STRNLEN COMMON_INTERCEPT_FUNCTION(strnlen)
#else
#define INIT_STRNLEN
#endif
#if SANITIZER_INTERCEPT_STRNDUP
INTERCEPTOR(char*, strndup, const char *s, uptr size) {
void *ctx;
COMMON_INTERCEPTOR_STRNDUP_IMPL(ctx, s, size);
}
#define INIT_STRNDUP COMMON_INTERCEPT_FUNCTION(strndup)
#else
#define INIT_STRNDUP
#endif // SANITIZER_INTERCEPT_STRNDUP
#if SANITIZER_INTERCEPT___STRNDUP
INTERCEPTOR(char*, __strndup, const char *s, uptr size) {
void *ctx;
COMMON_INTERCEPTOR_STRNDUP_IMPL(ctx, s, size);
}
#define INIT___STRNDUP COMMON_INTERCEPT_FUNCTION(__strndup)
#else
#define INIT___STRNDUP
#endif // SANITIZER_INTERCEPT___STRNDUP
#if SANITIZER_INTERCEPT_TEXTDOMAIN
INTERCEPTOR(char*, textdomain, const char *domainname) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, textdomain, domainname);
if (domainname) COMMON_INTERCEPTOR_READ_STRING(ctx, domainname, 0);
char *domain = REAL(textdomain)(domainname);
if (domain) {
COMMON_INTERCEPTOR_INITIALIZE_RANGE(domain, internal_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, int result)
INTERCEPTOR(int, strcmp, const char *s1, const char *s2) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, strcmp, 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;
}
if (common_flags()->intercept_strcmp) {
COMMON_INTERCEPTOR_READ_STRING(ctx, s1, i + 1);
COMMON_INTERCEPTOR_READ_STRING(ctx, s2, i + 1);
}
int result = CharCmpX(c1, c2);
CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strcmp, GET_CALLER_PC(), s1,
s2, result);
return result;
}
DECLARE_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strncmp, uptr called_pc,
const char *s1, const char *s2, uptr n,
int result)
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);
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;
}
uptr i1 = i;
uptr i2 = i;
if (common_flags()->strict_string_checks) {
for (; i1 < size && s1[i1]; i1++) {}
for (; i2 < size && s2[i2]; i2++) {}
}
COMMON_INTERCEPTOR_READ_RANGE((ctx), (s1), Min(i1 + 1, size));
COMMON_INTERCEPTOR_READ_RANGE((ctx), (s2), Min(i2 + 1, size));
int result = CharCmpX(c1, c2);
CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strncmp, GET_CALLER_PC(), s1,
s2, size, result);
return result;
}
#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;
}
DECLARE_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strcasecmp, uptr called_pc,
const char *s1, const char *s2, int result)
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);
int result = CharCaseCmp(c1, c2);
CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strcasecmp, GET_CALLER_PC(),
s1, s2, result);
return result;
}
DECLARE_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strncasecmp, uptr called_pc,
const char *s1, const char *s2, uptr size,
int result)
INTERCEPTOR(int, strncasecmp, const char *s1, const char *s2, SIZE_T size) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, strncasecmp, 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 (CharCaseCmp(c1, c2) != 0 || c1 == '\0') break;
}
uptr i1 = i;
uptr i2 = i;
if (common_flags()->strict_string_checks) {
for (; i1 < size && s1[i1]; i1++) {}
for (; i2 < size && s2[i2]; i2++) {}
}
COMMON_INTERCEPTOR_READ_RANGE((ctx), (s1), Min(i1 + 1, size));
COMMON_INTERCEPTOR_READ_RANGE((ctx), (s2), Min(i2 + 1, size));
int result = CharCaseCmp(c1, c2);
CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strncasecmp, GET_CALLER_PC(),
s1, s2, size, result);
return result;
}
#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 = internal_strlen(s1);
uptr len2 = internal_strlen(s2);
COMMON_INTERCEPTOR_READ_STRING(ctx, s1, r ? r - s1 + len2 : len1 + 1);
COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, len2 + 1);
}
#endif
#if SANITIZER_INTERCEPT_STRSTR
DECLARE_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strstr, uptr called_pc,
const char *s1, const char *s2, char *result)
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);
CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strstr, GET_CALLER_PC(), s1,
s2, r);
return r;
}
#define INIT_STRSTR COMMON_INTERCEPT_FUNCTION(strstr);
#else
#define INIT_STRSTR
#endif
#if SANITIZER_INTERCEPT_STRCASESTR
DECLARE_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strcasestr, uptr called_pc,
const char *s1, const char *s2, char *result)
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);
CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_strcasestr, GET_CALLER_PC(),
s1, s2, r);
return r;
}
#define INIT_STRCASESTR COMMON_INTERCEPT_FUNCTION(strcasestr);
#else
#define INIT_STRCASESTR
#endif
#if SANITIZER_INTERCEPT_STRTOK
INTERCEPTOR(char*, strtok, char *str, const char *delimiters) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, strtok, str, delimiters);
if (!common_flags()->intercept_strtok) {
return REAL(strtok)(str, delimiters);
}
if (common_flags()->strict_string_checks) {
// If strict_string_checks is enabled, we check the whole first argument
// string on the first call (strtok saves this string in a static buffer
// for subsequent calls). We do not need to check strtok's result.
// As the delimiters can change, we check them every call.
if (str != nullptr) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, str, internal_strlen(str) + 1);
}
COMMON_INTERCEPTOR_READ_RANGE(ctx, delimiters,
internal_strlen(delimiters) + 1);
return REAL(strtok)(str, delimiters);
} else {
// However, when strict_string_checks is disabled we cannot check the
// whole string on the first call. Instead, we check the result string
// which is guaranteed to be a NULL-terminated substring of the first
// argument. We also conservatively check one character of str and the
// delimiters.
if (str != nullptr) {
COMMON_INTERCEPTOR_READ_STRING(ctx, str, 1);
}
COMMON_INTERCEPTOR_READ_RANGE(ctx, delimiters, 1);
char *result = REAL(strtok)(str, delimiters);
if (result != nullptr) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, result, internal_strlen(result) + 1);
} else if (str != nullptr) {
// No delimiter were found, it's safe to assume that the entire str was
// scanned.
COMMON_INTERCEPTOR_READ_RANGE(ctx, str, internal_strlen(str) + 1);
}
return result;
}
}
#define INIT_STRTOK COMMON_INTERCEPT_FUNCTION(strtok)
#else
#define INIT_STRTOK
#endif
#if SANITIZER_INTERCEPT_MEMMEM
DECLARE_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_memmem, uptr called_pc,
const void *s1, SIZE_T len1, const void *s2,
SIZE_T len2, void *result)
INTERCEPTOR(void*, memmem, const void *s1, SIZE_T len1, const void *s2,
SIZE_T len2) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, memmem, s1, len1, s2, len2);
void *r = REAL(memmem)(s1, len1, s2, len2);
if (common_flags()->intercept_memmem) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, s1, len1);
COMMON_INTERCEPTOR_READ_RANGE(ctx, s2, len2);
}
CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_memmem, GET_CALLER_PC(),
s1, len1, s2, len2, r);
return r;
}
#define INIT_MEMMEM COMMON_INTERCEPT_FUNCTION(memmem);
#else
#define INIT_MEMMEM
#endif // SANITIZER_INTERCEPT_MEMMEM
#if SANITIZER_INTERCEPT_STRCHR
INTERCEPTOR(char*, strchr, const char *s, int c) {
void *ctx;
if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)
return internal_strchr(s, c);
COMMON_INTERCEPTOR_ENTER(ctx, strchr, s, c);
char *result = REAL(strchr)(s, c);
if (common_flags()->intercept_strchr) {
// Keep strlen as macro argument, as macro may ignore it.
COMMON_INTERCEPTOR_READ_STRING(ctx, s,
(result ? result - s : internal_strlen(s)) + 1);
}
return result;
}
#define INIT_STRCHR COMMON_INTERCEPT_FUNCTION(strchr)
#else
#define INIT_STRCHR
#endif
#if SANITIZER_INTERCEPT_STRCHRNUL
INTERCEPTOR(char*, strchrnul, const char *s, int c) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, strchrnul, s, c);
char *result = REAL(strchrnul)(s, c);
uptr len = result - s + 1;
if (common_flags()->intercept_strchr)
COMMON_INTERCEPTOR_READ_STRING(ctx, s, len);
return result;
}
#define INIT_STRCHRNUL COMMON_INTERCEPT_FUNCTION(strchrnul)
#else
#define INIT_STRCHRNUL
#endif
#if SANITIZER_INTERCEPT_STRRCHR
INTERCEPTOR(char*, strrchr, const char *s, int c) {
void *ctx;
if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)
return internal_strrchr(s, c);
COMMON_INTERCEPTOR_ENTER(ctx, strrchr, s, c);
if (common_flags()->intercept_strchr)
COMMON_INTERCEPTOR_READ_RANGE(ctx, s, internal_strlen(s) + 1);
return REAL(strrchr)(s, c);
}
#define INIT_STRRCHR COMMON_INTERCEPT_FUNCTION(strrchr)
#else
#define INIT_STRRCHR
#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, internal_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, internal_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, internal_strlen(s2) + 1);
COMMON_INTERCEPTOR_READ_STRING(ctx, s1,
r ? r - s1 + 1 : internal_strlen(s1) + 1);
}
return r;
}
#define INIT_STRPBRK COMMON_INTERCEPT_FUNCTION(strpbrk);
#else
#define INIT_STRPBRK
#endif
#if SANITIZER_INTERCEPT_MEMSET
INTERCEPTOR(void *, memset, void *dst, int v, uptr size) {
void *ctx;
COMMON_INTERCEPTOR_MEMSET_IMPL(ctx, dst, v, size);
}
#define INIT_MEMSET COMMON_INTERCEPT_FUNCTION(memset)
#else
#define INIT_MEMSET
#endif
#if SANITIZER_INTERCEPT_MEMMOVE
INTERCEPTOR(void *, memmove, void *dst, const void *src, uptr size) {
void *ctx;
COMMON_INTERCEPTOR_MEMMOVE_IMPL(ctx, dst, src, size);
}
#define INIT_MEMMOVE COMMON_INTERCEPT_FUNCTION(memmove)
#else
#define INIT_MEMMOVE
#endif
#if SANITIZER_INTERCEPT_MEMCPY
INTERCEPTOR(void *, memcpy, void *dst, const void *src, uptr size) {
// On OS X, calling internal_memcpy here will cause memory corruptions,
// because memcpy and memmove are actually aliases of the same
// implementation. We need to use internal_memmove here.
// N.B.: If we switch this to internal_ we'll have to use internal_memmove
// due to memcpy being an alias of memmove on OS X.
void *ctx;
#if PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE
COMMON_INTERCEPTOR_MEMCPY_IMPL(ctx, dst, src, size);
#else
COMMON_INTERCEPTOR_MEMMOVE_IMPL(ctx, dst, src, size);
#endif
}
#define INIT_MEMCPY \
do { \
if (PLATFORM_HAS_DIFFERENT_MEMCPY_AND_MEMMOVE) { \
COMMON_INTERCEPT_FUNCTION(memcpy); \
} else { \
ASSIGN_REAL(memcpy, memmove); \
} \
CHECK(REAL(memcpy)); \
} while (false)
#else
#define INIT_MEMCPY
#endif
#if SANITIZER_INTERCEPT_MEMCMP
DECLARE_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_memcmp, uptr called_pc,
const void *s1, const void *s2, uptr n,
int result)
// Common code for `memcmp` and `bcmp`.
int MemcmpInterceptorCommon(void *ctx,
int (*real_fn)(const void *, const void *, uptr),
const void *a1, const void *a2, uptr 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));
int r = CharCmpX(c1, c2);
CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_memcmp, GET_CALLER_PC(),
a1, a2, size, r);
return r;
}
}
int result = real_fn(a1, a2, size);
CALL_WEAK_INTERCEPTOR_HOOK(__sanitizer_weak_hook_memcmp, GET_CALLER_PC(), a1,
a2, size, result);
return result;
}
INTERCEPTOR(int, memcmp, const void *a1, const void *a2, uptr size) {
if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)
return internal_memcmp(a1, a2, size);
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, memcmp, a1, a2, size);
return MemcmpInterceptorCommon(ctx, REAL(memcmp), a1, a2, size);
}
#define INIT_MEMCMP COMMON_INTERCEPT_FUNCTION(memcmp)
#else
#define INIT_MEMCMP
#endif
#if SANITIZER_INTERCEPT_BCMP
INTERCEPTOR(int, bcmp, const void *a1, const void *a2, uptr size) {
if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)
return internal_memcmp(a1, a2, size);
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, bcmp, a1, a2, size);
return MemcmpInterceptorCommon(ctx, REAL(bcmp), a1, a2, size);
}
#define INIT_BCMP COMMON_INTERCEPT_FUNCTION(bcmp)
#else
#define INIT_BCMP
#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);
#if SANITIZER_WINDOWS
void *res;
if (REAL(memchr)) {
res = REAL(memchr)(s, c, n);
} else {
res = internal_memchr(s, c, n);
}
#else
void *res = REAL(memchr)(s, c, n);
#endif
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);
COMMON_INTERCEPTOR_INITIALIZE_RANGE(exp, sizeof(*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);
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, exp, sizeof(*exp));
float res = REAL(frexpf)(x, exp);
COMMON_INTERCEPTOR_INITIALIZE_RANGE(exp, sizeof(*exp));
return res;
}
INTERCEPTOR(long double, frexpl, long double x, int *exp) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, frexpl, x, exp);
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, exp, sizeof(*exp));
long double res = REAL(frexpl)(x, exp);
COMMON_INTERCEPTOR_INITIALIZE_RANGE(exp, sizeof(*exp));
return res;
}
#define INIT_FREXPF_FREXPL \
COMMON_INTERCEPT_FUNCTION(frexpf); \
COMMON_INTERCEPT_FUNCTION_LDBL(frexpl)
#else
#define INIT_FREXPF_FREXPL
#endif // SANITIZER_INTERCEPT_FREXPF_FREXPL
#if SI_POSIX
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://github.com/google/sanitizers/issues/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_FREAD
INTERCEPTOR(SIZE_T, fread, void *ptr, SIZE_T size, SIZE_T nmemb, void *file) {
// libc file streams can call user-supplied functions, see fopencookie.
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, fread, ptr, size, nmemb, file);
// FIXME: under ASan the call below may write to freed memory and corrupt
// its metadata. See
// https://github.com/google/sanitizers/issues/321.
SIZE_T res = REAL(fread)(ptr, size, nmemb, file);
if (res > 0) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ptr, res * size);
return res;
}
#define INIT_FREAD COMMON_INTERCEPT_FUNCTION(fread)
#else
#define INIT_FREAD
#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://github.com/google/sanitizers/issues/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://github.com/google/sanitizers/issues/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_FWRITE
INTERCEPTOR(SIZE_T, fwrite, const void *p, uptr size, uptr nmemb, void *file) {
// libc file streams can call user-supplied functions, see fopencookie.
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, fwrite, p, size, nmemb, file);
SIZE_T res = REAL(fwrite)(p, size, nmemb, file);
if (res > 0) COMMON_INTERCEPTOR_READ_RANGE(ctx, p, res * size);
return res;
}
#define INIT_FWRITE COMMON_INTERCEPT_FUNCTION(fwrite)
#else
#define INIT_FWRITE
#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_FGETS
INTERCEPTOR(char *, fgets, char *s, SIZE_T size, void *file) {
// libc file streams can call user-supplied functions, see fopencookie.
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, fgets, s, size, file);
// FIXME: under ASan the call below may write to freed memory and corrupt
// its metadata. See
// https://github.com/google/sanitizers/issues/321.
char *res = REAL(fgets)(s, size, file);
if (res)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, s, internal_strlen(s) + 1);
return res;
}
#define INIT_FGETS COMMON_INTERCEPT_FUNCTION(fgets)
#else
#define INIT_FGETS
#endif
#if SANITIZER_INTERCEPT_FPUTS
INTERCEPTOR_WITH_SUFFIX(int, fputs, char *s, void *file) {
// libc file streams can call user-supplied functions, see fopencookie.
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, fputs, s, file);
if (!SANITIZER_MAC || s) { // `fputs(NULL, file)` is supported on Darwin.
COMMON_INTERCEPTOR_READ_RANGE(ctx, s, internal_strlen(s) + 1);
}
return REAL(fputs)(s, file);
}
#define INIT_FPUTS COMMON_INTERCEPT_FUNCTION(fputs)
#else
#define INIT_FPUTS
#endif
#if SANITIZER_INTERCEPT_PUTS
INTERCEPTOR(int, puts, char *s) {
// libc file streams can call user-supplied functions, see fopencookie.
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, puts, s);
if (!SANITIZER_MAC || s) { // `puts(NULL)` is supported on Darwin.
COMMON_INTERCEPTOR_READ_RANGE(ctx, s, internal_strlen(s) + 1);
}
return REAL(puts)(s);
}
#define INIT_PUTS COMMON_INTERCEPT_FUNCTION(puts)
#else
#define INIT_PUTS
#endif
#if SANITIZER_INTERCEPT_PRCTL
INTERCEPTOR(int, prctl, int option, unsigned long arg2, unsigned long arg3,
unsigned long arg4, unsigned long arg5) {
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 !SANITIZER_SOLARIS
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,
internal_strlen(tm->tm_zone) + 1);
}
#endif
}
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://github.com/google/sanitizers/issues/321.
char *res = REAL(ctime)(timep);
if (res) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_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://github.com/google/sanitizers/issues/321.
char *res = REAL(ctime_r)(timep, result);
if (res) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_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://github.com/google/sanitizers/issues/321.
char *res = REAL(asctime)(tm);
if (res) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, tm, sizeof(*tm));
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_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://github.com/google/sanitizers/issues/321.
char *res = REAL(asctime_r)(tm, result);
if (res) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, tm, sizeof(*tm));
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_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, internal_strlen(format) + 1);
// FIXME: under ASan the call below may write to freed memory and corrupt
// its metadata. See
// https://github.com/google/sanitizers/issues/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_LDBL(scanf); \
COMMON_INTERCEPT_FUNCTION_LDBL(sscanf); \
COMMON_INTERCEPT_FUNCTION_LDBL(fscanf); \
COMMON_INTERCEPT_FUNCTION_LDBL(vscanf); \
COMMON_INTERCEPT_FUNCTION_LDBL(vsscanf); \
COMMON_INTERCEPT_FUNCTION_LDBL(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://github.com/google/sanitizers/issues/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://github.com/google/sanitizers/issues/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://github.com/google/sanitizers/issues/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_CHK
INTERCEPTOR(int, __vsnprintf_chk, char *str, SIZE_T size, int flag,
SIZE_T size_to, const char *format, va_list ap)
VSNPRINTF_INTERCEPTOR_IMPL(vsnprintf, str, size, format, ap)
#endif
#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)
#if SANITIZER_INTERCEPT___PRINTF_CHK
INTERCEPTOR(int, __vsprintf_chk, char *str, int flag, SIZE_T size_to,
const char *format, va_list ap)
VSPRINTF_INTERCEPTOR_IMPL(vsprintf, str, format, ap)
#endif
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)
#if SANITIZER_INTERCEPT___PRINTF_CHK
INTERCEPTOR(int, __fprintf_chk, __sanitizer_FILE *stream, SIZE_T size,
const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(__fprintf_chk, vfprintf, stream, format)
#endif
INTERCEPTOR(int, sprintf, char *str, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(sprintf, vsprintf, str, format)
#if SANITIZER_INTERCEPT___PRINTF_CHK
INTERCEPTOR(int, __sprintf_chk, char *str, int flag, SIZE_T size_to,
const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(__sprintf_chk, vsprintf, str, format)
#endif
INTERCEPTOR(int, snprintf, char *str, SIZE_T size, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(snprintf, vsnprintf, str, size, format)
#if SANITIZER_INTERCEPT___PRINTF_CHK
INTERCEPTOR(int, __snprintf_chk, char *str, SIZE_T size, int flag,
SIZE_T size_to, const char *format, ...)
FORMAT_INTERCEPTOR_IMPL(__snprintf_chk, vsnprintf, str, size, format)
#endif
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_LDBL(printf); \
COMMON_INTERCEPT_FUNCTION_LDBL(sprintf); \
COMMON_INTERCEPT_FUNCTION_LDBL(snprintf); \
COMMON_INTERCEPT_FUNCTION_LDBL(asprintf); \
COMMON_INTERCEPT_FUNCTION_LDBL(fprintf); \
COMMON_INTERCEPT_FUNCTION_LDBL(vprintf); \
COMMON_INTERCEPT_FUNCTION_LDBL(vsprintf); \
COMMON_INTERCEPT_FUNCTION_LDBL(vsnprintf); \
COMMON_INTERCEPT_FUNCTION_LDBL(vasprintf); \
COMMON_INTERCEPT_FUNCTION_LDBL(vfprintf);
#else
#define INIT_PRINTF
#endif
#if SANITIZER_INTERCEPT___PRINTF_CHK
#define INIT___PRINTF_CHK \
COMMON_INTERCEPT_FUNCTION(__sprintf_chk); \
COMMON_INTERCEPT_FUNCTION(__snprintf_chk); \
COMMON_INTERCEPT_FUNCTION(__vsprintf_chk); \
COMMON_INTERCEPT_FUNCTION(__vsnprintf_chk); \
COMMON_INTERCEPT_FUNCTION(__fprintf_chk);
#else
#define INIT___PRINTF_CHK
#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"
#include "sanitizer_interceptors_ioctl_netbsd.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%lx\n", request);
if (!ioctl_decode(request, &decoded_desc))
Printf("WARNING: failed decoding unknown ioctl 0x%lx\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_POSIX
UNUSED 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_WRITE_RANGE(ctx, pwd->pw_name,
internal_strlen(pwd->pw_name) + 1);
if (pwd->pw_passwd)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd->pw_passwd,
internal_strlen(pwd->pw_passwd) + 1);
#if !SANITIZER_ANDROID
if (pwd->pw_gecos)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd->pw_gecos,
internal_strlen(pwd->pw_gecos) + 1);
#endif
#if SANITIZER_MAC || SANITIZER_FREEBSD || SANITIZER_NETBSD
if (pwd->pw_class)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd->pw_class,
internal_strlen(pwd->pw_class) + 1);
#endif
if (pwd->pw_dir)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd->pw_dir,
internal_strlen(pwd->pw_dir) + 1);
if (pwd->pw_shell)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwd->pw_shell,
internal_strlen(pwd->pw_shell) + 1);
}
}
UNUSED 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_WRITE_RANGE(ctx, grp->gr_name,
internal_strlen(grp->gr_name) + 1);
if (grp->gr_passwd)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, grp->gr_passwd,
internal_strlen(grp->gr_passwd) + 1);
char **p = grp->gr_mem;
for (; *p; ++p) {
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, internal_strlen(*p) + 1);
}
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, grp->gr_mem,
(p - grp->gr_mem + 1) * sizeof(*p));
}
}
#endif // SANITIZER_POSIX
#if SANITIZER_INTERCEPT_GETPWNAM_AND_FRIENDS
INTERCEPTOR(__sanitizer_passwd *, getpwnam, const char *name) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, getpwnam, name);
if (name)
COMMON_INTERCEPTOR_READ_RANGE(ctx, name, internal_strlen(name) + 1);
__sanitizer_passwd *res = REAL(getpwnam)(name);
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);
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, internal_strlen(name) + 1);
__sanitizer_group *res = REAL(getgrnam)(name);
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);
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, internal_strlen(name) + 1);
// FIXME: under ASan the call below may write to freed memory and corrupt
// its metadata. See
// https://github.com/google/sanitizers/issues/321.
int res = REAL(getpwnam_r)(name, pwd, buf, buflen, result);
if (!res && result)
unpoison_passwd(ctx, *result);
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://github.com/google/sanitizers/issues/321.
int res = REAL(getpwuid_r)(uid, pwd, buf, buflen, result);
if (!res && result)
unpoison_passwd(ctx, *result);
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, internal_strlen(name) + 1);
// FIXME: under ASan the call below may write to freed memory and corrupt
// its metadata. See
// https://github.com/google/sanitizers/issues/321.
int res = REAL(getgrnam_r)(name, grp, buf, buflen, result);
if (!res && result)
unpoison_group(ctx, *result);
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://github.com/google/sanitizers/issues/321.
int res = REAL(getgrgid_r)(gid, grp, buf, buflen, result);
if (!res && result)
unpoison_group(ctx, *result);
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);
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);
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);
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);
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://github.com/google/sanitizers/issues/321.
int res = REAL(getpwent_r)(pwbuf, buf, buflen, pwbufp);
if (!res && pwbufp)
unpoison_passwd(ctx, *pwbufp);
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://github.com/google/sanitizers/issues/321.
int res = REAL(getgrent_r)(pwbuf, buf, buflen, pwbufp);
if (!res && pwbufp)
unpoison_group(ctx, *pwbufp);
if (pwbufp) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwbufp, sizeof(*pwbufp));
return res;
}
#define INIT_GETPWENT_R \
COMMON_INTERCEPT_FUNCTION(getpwent_r); \
COMMON_INTERCEPT_FUNCTION(getgrent_r);
#else
#define INIT_GETPWENT_R
#endif
#if SANITIZER_INTERCEPT_FGETPWENT_R
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://github.com/google/sanitizers/issues/321.
int res = REAL(fgetpwent_r)(fp, pwbuf, buf, buflen, pwbufp);
if (!res && pwbufp)
unpoison_passwd(ctx, *pwbufp);
if (pwbufp) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwbufp, sizeof(*pwbufp));
return res;
}
#define INIT_FGETPWENT_R \
COMMON_INTERCEPT_FUNCTION(fgetpwent_r);
#else
#define INIT_FGETPWENT_R
#endif
#if SANITIZER_INTERCEPT_FGETGRENT_R
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://github.com/google/sanitizers/issues/321.
int res = REAL(fgetgrent_r)(fp, pwbuf, buf, buflen, pwbufp);
if (!res && pwbufp)
unpoison_group(ctx, *pwbufp);
if (pwbufp) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pwbufp, sizeof(*pwbufp));
return res;
}
#define INIT_FGETGRENT_R \
COMMON_INTERCEPT_FUNCTION(fgetgrent_r);
#else
#define INIT_FGETGRENT_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://github.com/google/sanitizers/issues/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://github.com/google/sanitizers/issues/321.
int res = REAL(clock_gettime)(clk_id, tp);
if (!res) {
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, tp, struct_timespec_sz);
}
return res;
}
#if SANITIZER_GLIBC
namespace __sanitizer {
extern "C" {
int real_clock_gettime(u32 clk_id, void *tp) {
if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)
return internal_clock_gettime(clk_id, tp);
return REAL(clock_gettime)(clk_id, tp);
}
} // extern "C"
} // namespace __sanitizer
#endif
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_CLOCK_GETCPUCLOCKID
INTERCEPTOR(int, clock_getcpuclockid, pid_t pid,
__sanitizer_clockid_t *clockid) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, clock_getcpuclockid, pid, clockid);
int res = REAL(clock_getcpuclockid)(pid, clockid);
if (!res && clockid) {
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, clockid, sizeof *clockid);
}
return res;
}
INTERCEPTOR(int, pthread_getcpuclockid, uptr thread,
__sanitizer_clockid_t *clockid) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, pthread_getcpuclockid, thread, clockid);
int res = REAL(pthread_getcpuclockid)(thread, clockid);
if (!res && clockid) {
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, clockid, sizeof *clockid);
}
return res;
}
#define INIT_CLOCK_GETCPUCLOCKID \
COMMON_INTERCEPT_FUNCTION(clock_getcpuclockid); \
COMMON_INTERCEPT_FUNCTION(pthread_getcpuclockid);
#else
#define INIT_CLOCK_GETCPUCLOCKID
#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://github.com/google/sanitizers/issues/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) {
// itimerval can contain padding that may be legitimately uninitialized
const struct __sanitizer_itimerval *nv =
(const struct __sanitizer_itimerval *)new_value;
COMMON_INTERCEPTOR_READ_RANGE(ctx, &nv->it_interval.tv_sec,
sizeof(__sanitizer_time_t));
COMMON_INTERCEPTOR_READ_RANGE(ctx, &nv->it_interval.tv_usec,
sizeof(__sanitizer_suseconds_t));
COMMON_INTERCEPTOR_READ_RANGE(ctx, &nv->it_value.tv_sec,
sizeof(__sanitizer_time_t));
COMMON_INTERCEPTOR_READ_RANGE(ctx, &nv->it_value.tv_usec,
sizeof(__sanitizer_suseconds_t));
}
// FIXME: under ASan the call below may write to freed memory and corrupt
// its metadata. See
// https://github.com/google/sanitizers/issues/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, internal_strlen(p) + 1);
}
}
#if SANITIZER_SOLARIS
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);
int res = REAL(glob)(pattern, flags, errfunc, pglob);
if ((!res || res == glob_nomatch) && pglob) unpoison_glob_t(ctx, pglob);
return res;
}
#else
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, internal_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, internal_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, internal_strlen(s) + 1);
return pglob_copy->gl_stat(s, st);
}
static const __sanitizer_glob_t kGlobCopy = {
0, 0, 0,
0, wrapped_gl_closedir, wrapped_gl_readdir,
wrapped_gl_opendir, wrapped_gl_lstat, wrapped_gl_stat};
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;
internal_memcpy(&glob_copy, &kGlobCopy, sizeof(glob_copy));
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;
}
#endif // SANITIZER_SOLARIS
#define INIT_GLOB \
COMMON_INTERCEPT_FUNCTION(glob);
#else // SANITIZER_INTERCEPT_GLOB
#define INIT_GLOB
#endif // SANITIZER_INTERCEPT_GLOB
#if SANITIZER_INTERCEPT_GLOB64
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;
internal_memcpy(&glob_copy, &kGlobCopy, sizeof(glob_copy));
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_GLOB64 \
COMMON_INTERCEPT_FUNCTION(glob64);
#else // SANITIZER_INTERCEPT_GLOB64
#define INIT_GLOB64
#endif // SANITIZER_INTERCEPT_GLOB64
#if SANITIZER_INTERCEPT_POSIX_SPAWN
template <class RealSpawnPtr>
static int PosixSpawnImpl(void *ctx, RealSpawnPtr *real_posix_spawn, pid_t *pid,
const char *file_or_path, const void *file_actions,
const void *attrp, char *const argv[],
char *const envp[]) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, file_or_path,
internal_strlen(file_or_path) + 1);
if (argv) {
for (char *const *s = argv; ; ++s) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, s, sizeof(*s));
if (!*s) break;
COMMON_INTERCEPTOR_READ_RANGE(ctx, *s, internal_strlen(*s) + 1);
}
}
if (envp) {
for (char *const *s = envp; ; ++s) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, s, sizeof(*s));
if (!*s) break;
COMMON_INTERCEPTOR_READ_RANGE(ctx, *s, internal_strlen(*s) + 1);
}
}
int res =
real_posix_spawn(pid, file_or_path, file_actions, attrp, argv, envp);
if (res == 0)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, pid, sizeof(*pid));
return res;
}
INTERCEPTOR(int, posix_spawn, pid_t *pid, const char *path,
const void *file_actions, const void *attrp, char *const argv[],
char *const envp[]) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, posix_spawn, pid, path, file_actions, attrp,
argv, envp);
return PosixSpawnImpl(ctx, REAL(posix_spawn), pid, path, file_actions, attrp,
argv, envp);
}
INTERCEPTOR(int, posix_spawnp, pid_t *pid, const char *file,
const void *file_actions, const void *attrp, char *const argv[],
char *const envp[]) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, posix_spawnp, pid, file, file_actions, attrp,
argv, envp);
return PosixSpawnImpl(ctx, REAL(posix_spawnp), pid, file, file_actions, attrp,
argv, envp);
}
# define INIT_POSIX_SPAWN \
COMMON_INTERCEPT_FUNCTION(posix_spawn); \
COMMON_INTERCEPT_FUNCTION(posix_spawnp);
#else // SANITIZER_INTERCEPT_POSIX_SPAWN
# define INIT_POSIX_SPAWN
#endif // SANITIZER_INTERCEPT_POSIX_SPAWN
#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://github.com/google/sanitizers/issues/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://github.com/google/sanitizers/issues/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://github.com/google/sanitizers/issues/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://github.com/google/sanitizers/issues/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://github.com/google/sanitizers/issues/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://github.com/google/sanitizers/issues/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://github.com/google/sanitizers/issues/321.
char *res = REAL(inet_ntop)(af, src, dst, size);
if (res) COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, internal_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://github.com/google/sanitizers/issues/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, internal_strlen(cp) + 1);
// FIXME: under ASan the call below may write to freed memory and corrupt
// its metadata. See
// https://github.com/google/sanitizers/issues/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://github.com/google/sanitizers/issues/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, internal_strlen(node) + 1);
if (service)
COMMON_INTERCEPTOR_READ_RANGE(ctx, service, internal_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://github.com/google/sanitizers/issues/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,
internal_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://github.com/google/sanitizers/issues/321.
int res =
REAL(getnameinfo)(sockaddr, salen, host, hostlen, serv, servlen, flags);
if (res == 0) {
if (host && hostlen)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, host, internal_strlen(host) + 1);
if (serv && servlen)
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, serv, internal_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, unsigned *addrlen) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, getsockname, sock_fd, addr, addrlen);
unsigned addr_sz;
if (addrlen) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, addrlen, sizeof(*addrlen));
addr_sz = *addrlen;
}
// FIXME: under ASan the call below may write to freed memory and corrupt
// its metadata. See
// https://github.com/google/sanitizers/issues/321.
int res = REAL(getsockname)(sock_fd, addr, addrlen);
if (!res && addr && addrlen) {
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, addr, Min(addr_sz, *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, internal_strlen(h->h_name) + 1);
char **p = h->h_aliases;
while (*p) {
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, *p, internal_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 (*