141 lines
3.8 KiB
C++
141 lines
3.8 KiB
C++
//===-- asan_malloc_win.cc ------------------------------------------------===//
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is a part of AddressSanitizer, an address sanity checker.
|
|
//
|
|
// Windows-specific malloc interception.
|
|
//===----------------------------------------------------------------------===//
|
|
#ifdef _WIN32
|
|
|
|
#include "asan_allocator.h"
|
|
#include "asan_interceptors.h"
|
|
#include "asan_internal.h"
|
|
#include "asan_stack.h"
|
|
#include "interception/interception.h"
|
|
|
|
#include <stddef.h>
|
|
|
|
// ---------------------- Replacement functions ---------------- {{{1
|
|
using namespace __asan; // NOLINT
|
|
|
|
// FIXME: Simply defining functions with the same signature in *.obj
|
|
// files overrides the standard functions in *.lib
|
|
// This works well for simple helloworld-like tests but might need to be
|
|
// revisited in the future.
|
|
|
|
extern "C" {
|
|
void free(void *ptr) {
|
|
GET_STACK_TRACE_FREE;
|
|
return asan_free(ptr, &stack, FROM_MALLOC);
|
|
}
|
|
|
|
void _free_dbg(void* ptr, int) {
|
|
free(ptr);
|
|
}
|
|
|
|
void cfree(void *ptr) {
|
|
CHECK(!"cfree() should not be used on Windows?");
|
|
}
|
|
|
|
void *malloc(size_t size) {
|
|
GET_STACK_TRACE_MALLOC;
|
|
return asan_malloc(size, &stack);
|
|
}
|
|
|
|
void* _malloc_dbg(size_t size, int , const char*, int) {
|
|
return malloc(size);
|
|
}
|
|
|
|
void *calloc(size_t nmemb, size_t size) {
|
|
GET_STACK_TRACE_MALLOC;
|
|
return asan_calloc(nmemb, size, &stack);
|
|
}
|
|
|
|
void* _calloc_dbg(size_t n, size_t size, int, const char*, int) {
|
|
return calloc(n, size);
|
|
}
|
|
|
|
void *_calloc_impl(size_t nmemb, size_t size, int *errno_tmp) {
|
|
return calloc(nmemb, size);
|
|
}
|
|
|
|
void *realloc(void *ptr, size_t size) {
|
|
GET_STACK_TRACE_MALLOC;
|
|
return asan_realloc(ptr, size, &stack);
|
|
}
|
|
|
|
void *_realloc_dbg(void *ptr, size_t size, int) {
|
|
CHECK(!"_realloc_dbg should not exist!");
|
|
return 0;
|
|
}
|
|
|
|
void* _recalloc(void* p, size_t n, size_t elem_size) {
|
|
if (!p)
|
|
return calloc(n, elem_size);
|
|
const size_t size = n * elem_size;
|
|
if (elem_size != 0 && size / elem_size != n)
|
|
return 0;
|
|
return realloc(p, size);
|
|
}
|
|
|
|
size_t _msize(void *ptr) {
|
|
GET_STACK_TRACE_MALLOC;
|
|
return asan_malloc_usable_size(ptr, &stack);
|
|
}
|
|
|
|
int _CrtDbgReport(int, const char*, int,
|
|
const char*, const char*, ...) {
|
|
ShowStatsAndAbort();
|
|
}
|
|
|
|
int _CrtDbgReportW(int reportType, const wchar_t*, int,
|
|
const wchar_t*, const wchar_t*, ...) {
|
|
ShowStatsAndAbort();
|
|
}
|
|
|
|
int _CrtSetReportMode(int, int) {
|
|
return 0;
|
|
}
|
|
} // extern "C"
|
|
|
|
using __interception::GetRealFunctionAddress;
|
|
|
|
// We don't want to include "windows.h" in this file to avoid extra attributes
|
|
// set on malloc/free etc (e.g. dllimport), so declare a few things manually:
|
|
extern "C" int __stdcall VirtualProtect(void* addr, size_t size,
|
|
DWORD prot, DWORD *old_prot);
|
|
const int PAGE_EXECUTE_READWRITE = 0x40;
|
|
|
|
namespace __asan {
|
|
void ReplaceSystemMalloc() {
|
|
#if defined(_DLL)
|
|
# ifdef _WIN64
|
|
# error ReplaceSystemMalloc was not tested on x64
|
|
# endif
|
|
char *crt_malloc;
|
|
if (GetRealFunctionAddress("malloc", (void**)&crt_malloc)) {
|
|
// Replace malloc in the CRT dll with a jump to our malloc.
|
|
DWORD old_prot, unused;
|
|
CHECK(VirtualProtect(crt_malloc, 16, PAGE_EXECUTE_READWRITE, &old_prot));
|
|
REAL(memset)(crt_malloc, 0xCC /* int 3 */, 16); // just in case.
|
|
|
|
ptrdiff_t jmp_offset = (char*)malloc - (char*)crt_malloc - 5;
|
|
crt_malloc[0] = 0xE9; // jmp, should be followed by an offset.
|
|
REAL(memcpy)(crt_malloc + 1, &jmp_offset, sizeof(jmp_offset));
|
|
|
|
CHECK(VirtualProtect(crt_malloc, 16, old_prot, &unused));
|
|
|
|
// FYI: FlushInstructionCache is needed on Itanium etc but not on x86/x64.
|
|
}
|
|
|
|
// FIXME: investigate whether anything else is needed.
|
|
#endif
|
|
}
|
|
} // namespace __asan
|
|
|
|
#endif // _WIN32
|