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//===-- sanitizer_common_interceptors.inc -----------------------*- C++ -*-===//
//
// 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_READ_RANGE
// COMMON_INTERCEPTOR_WRITE_RANGE
// COMMON_INTERCEPTOR_FD_ACQUIRE
// COMMON_INTERCEPTOR_FD_RELEASE
// COMMON_INTERCEPTOR_SET_THREAD_NAME
//===----------------------------------------------------------------------===//
#include "interception/interception.h"
#include "sanitizer_platform_interceptors.h"
#include <stdarg.h>
#ifdef _WIN32
#define va_copy(dst, src) ((dst) = (src))
#endif // _WIN32
#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);
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 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);
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 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);
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 INTERCEPT_FUNCTION(pread64)
#else
#define INIT_PREAD64
#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);
if (fd >= 0)
COMMON_INTERCEPTOR_FD_RELEASE(ctx, fd);
SSIZE_T res = REAL(write)(fd, ptr, count);
if (res > 0)
COMMON_INTERCEPTOR_READ_RANGE(ctx, ptr, res);
return res;
}
#define INIT_WRITE 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);
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 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);
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 INTERCEPT_FUNCTION(pwrite64)
#else
#define INIT_PWRITE64
#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 INTERCEPT_FUNCTION(prctl)
#else
#define INIT_PRCTL
#endif // SANITIZER_INTERCEPT_PRCTL
#if SANITIZER_INTERCEPT_LOCALTIME_AND_FRIENDS
INTERCEPTOR(void *, localtime, unsigned long *timep) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, localtime, timep);
void *res = REAL(localtime)(timep);
if (res) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, struct_tm_sz);
}
return res;
}
INTERCEPTOR(void *, localtime_r, unsigned long *timep, void *result) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, localtime_r, timep, result);
void *res = REAL(localtime_r)(timep, result);
if (res) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, struct_tm_sz);
}
return res;
}
INTERCEPTOR(void *, gmtime, unsigned long *timep) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, gmtime, timep);
void *res = REAL(gmtime)(timep);
if (res) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, struct_tm_sz);
}
return res;
}
INTERCEPTOR(void *, gmtime_r, unsigned long *timep, void *result) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, gmtime_r, timep, result);
void *res = REAL(gmtime_r)(timep, result);
if (res) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, timep, sizeof(*timep));
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, struct_tm_sz);
}
return res;
}
INTERCEPTOR(char *, ctime, unsigned long *timep) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, ctime, timep);
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);
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, void *tm) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, asctime, tm);
char *res = REAL(asctime)(tm);
if (res) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, tm, struct_tm_sz);
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
}
return res;
}
INTERCEPTOR(char *, asctime_r, void *tm, char *result) {
void *ctx;
COMMON_INTERCEPTOR_ENTER(ctx, asctime_r, tm, result);
char *res = REAL(asctime_r)(tm, result);
if (res) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, tm, struct_tm_sz);
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, res, REAL(strlen)(res) + 1);
}
return res;
}
#define INIT_LOCALTIME_AND_FRIENDS \
INTERCEPT_FUNCTION(localtime); \
INTERCEPT_FUNCTION(localtime_r); \
INTERCEPT_FUNCTION(gmtime); \
INTERCEPT_FUNCTION(gmtime_r); \
INTERCEPT_FUNCTION(ctime); \
INTERCEPT_FUNCTION(ctime_r); \
INTERCEPT_FUNCTION(asctime); \
INTERCEPT_FUNCTION(asctime_r);
#else
#define INIT_LOCALTIME_AND_FRIENDS
#endif // SANITIZER_INTERCEPT_LOCALTIME_AND_FRIENDS
#if SANITIZER_INTERCEPT_SCANF
#include "sanitizer_common_interceptors_scanf.inc"
#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
#define SCANF_INTERCEPTOR_IMPL(name, vname, ...) \
{ \
void *ctx; \
COMMON_INTERCEPTOR_ENTER(ctx, name, __VA_ARGS__); \
va_list ap; \
va_start(ap, format); \
int res = vname(__VA_ARGS__, ap); \
va_end(ap); \
return res; \
}
INTERCEPTOR(int, scanf, const char *format, ...)
SCANF_INTERCEPTOR_IMPL(scanf, vscanf, format)
INTERCEPTOR(int, fscanf, void *stream, const char *format, ...)
SCANF_INTERCEPTOR_IMPL(fscanf, vfscanf, stream, format)
INTERCEPTOR(int, sscanf, const char *str, const char *format, ...)
SCANF_INTERCEPTOR_IMPL(sscanf, vsscanf, str, format)
#if SANITIZER_INTERCEPT_ISOC99_SCANF
INTERCEPTOR(int, __isoc99_scanf, const char *format, ...)
SCANF_INTERCEPTOR_IMPL(__isoc99_scanf, __isoc99_vscanf, format)
INTERCEPTOR(int, __isoc99_fscanf, void *stream, const char *format, ...)
SCANF_INTERCEPTOR_IMPL(__isoc99_fscanf, __isoc99_vfscanf, stream, format)
INTERCEPTOR(int, __isoc99_sscanf, const char *str, const char *format, ...)
SCANF_INTERCEPTOR_IMPL(__isoc99_sscanf, __isoc99_vsscanf, str, format)
#endif
#define INIT_SCANF \
INTERCEPT_FUNCTION(scanf); \
INTERCEPT_FUNCTION(sscanf); \
INTERCEPT_FUNCTION(fscanf); \
INTERCEPT_FUNCTION(vscanf); \
INTERCEPT_FUNCTION(vsscanf); \
INTERCEPT_FUNCTION(vfscanf); \
INTERCEPT_FUNCTION(__isoc99_scanf); \
INTERCEPT_FUNCTION(__isoc99_sscanf); \
INTERCEPT_FUNCTION(__isoc99_fscanf); \
INTERCEPT_FUNCTION(__isoc99_vscanf); \
INTERCEPT_FUNCTION(__isoc99_vsscanf); \
INTERCEPT_FUNCTION(__isoc99_vfscanf);
#else
#define INIT_SCANF
#endif
#define SANITIZER_COMMON_INTERCEPTORS_INIT \
INIT_READ; \
INIT_PREAD; \
INIT_PREAD64; \
INIT_PRCTL; \
INIT_WRITE; \
INIT_PWRITE; \
INIT_PWRITE64; \
INIT_LOCALTIME_AND_FRIENDS; \
INIT_SCANF;
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