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//===-- hwasan_allocation_functions.cpp -----------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file is a part of HWAddressSanitizer.
//
// Definitions for __sanitizer allocation functions.
//
//===----------------------------------------------------------------------===//
#include "hwasan.h"
#include "interception/interception.h"
#include "sanitizer_common/sanitizer_allocator_dlsym.h"
#include "sanitizer_common/sanitizer_allocator_interface.h"
#include "sanitizer_common/sanitizer_mallinfo.h"
#include "sanitizer_common/sanitizer_tls_get_addr.h"
using namespace __hwasan;
struct DlsymAlloc : public DlSymAllocator<DlsymAlloc> {
static bool UseImpl() { return !hwasan_inited; }
static void OnAllocate(const void *ptr, uptr size) {
# if CAN_SANITIZE_LEAKS
// Suppress leaks from dlerror(). Previously dlsym hack on global array was
// used by leak sanitizer as a root region.
__lsan_register_root_region(ptr, size);
# endif
}
static void OnFree(const void *ptr, uptr size) {
# if CAN_SANITIZE_LEAKS
__lsan_unregister_root_region(ptr, size);
# endif
}
};
extern "C" {
SANITIZER_INTERFACE_ATTRIBUTE
int __sanitizer_posix_memalign(void **memptr, uptr alignment, uptr size) {
GET_MALLOC_STACK_TRACE;
CHECK_NE(memptr, 0);
int res = hwasan_posix_memalign(memptr, alignment, size, &stack);
return res;
}
SANITIZER_INTERFACE_ATTRIBUTE
void *__sanitizer_memalign(uptr alignment, uptr size) {
GET_MALLOC_STACK_TRACE;
return hwasan_memalign(alignment, size, &stack);
}
SANITIZER_INTERFACE_ATTRIBUTE
void *__sanitizer_aligned_alloc(uptr alignment, uptr size) {
GET_MALLOC_STACK_TRACE;
return hwasan_aligned_alloc(alignment, size, &stack);
}
SANITIZER_INTERFACE_ATTRIBUTE
void *__sanitizer___libc_memalign(uptr alignment, uptr size) {
GET_MALLOC_STACK_TRACE;
void *ptr = hwasan_memalign(alignment, size, &stack);
if (ptr)
DTLS_on_libc_memalign(ptr, size);
return ptr;
}
SANITIZER_INTERFACE_ATTRIBUTE
void *__sanitizer_valloc(uptr size) {
GET_MALLOC_STACK_TRACE;
return hwasan_valloc(size, &stack);
}
SANITIZER_INTERFACE_ATTRIBUTE
void *__sanitizer_pvalloc(uptr size) {
GET_MALLOC_STACK_TRACE;
return hwasan_pvalloc(size, &stack);
}
SANITIZER_INTERFACE_ATTRIBUTE
void __sanitizer_free(void *ptr) {
if (!ptr)
return;
if (DlsymAlloc::PointerIsMine(ptr))
return DlsymAlloc::Free(ptr);
GET_MALLOC_STACK_TRACE;
hwasan_free(ptr, &stack);
}
SANITIZER_INTERFACE_ATTRIBUTE
void __sanitizer_cfree(void *ptr) {
if (!ptr)
return;
if (DlsymAlloc::PointerIsMine(ptr))
return DlsymAlloc::Free(ptr);
GET_MALLOC_STACK_TRACE;
hwasan_free(ptr, &stack);
}
SANITIZER_INTERFACE_ATTRIBUTE
uptr __sanitizer_malloc_usable_size(const void *ptr) {
return __sanitizer_get_allocated_size(ptr);
}
SANITIZER_INTERFACE_ATTRIBUTE
struct __sanitizer_struct_mallinfo __sanitizer_mallinfo() {
__sanitizer_struct_mallinfo sret;
internal_memset(&sret, 0, sizeof(sret));
return sret;
}
SANITIZER_INTERFACE_ATTRIBUTE
int __sanitizer_mallopt(int cmd, int value) { return 0; }
SANITIZER_INTERFACE_ATTRIBUTE
void __sanitizer_malloc_stats(void) {
// FIXME: implement, but don't call REAL(malloc_stats)!
}
SANITIZER_INTERFACE_ATTRIBUTE
void *__sanitizer_calloc(uptr nmemb, uptr size) {
if (DlsymAlloc::Use())
return DlsymAlloc::Callocate(nmemb, size);
GET_MALLOC_STACK_TRACE;
return hwasan_calloc(nmemb, size, &stack);
}
SANITIZER_INTERFACE_ATTRIBUTE
void *__sanitizer_realloc(void *ptr, uptr size) {
if (DlsymAlloc::Use() || DlsymAlloc::PointerIsMine(ptr))
return DlsymAlloc::Realloc(ptr, size);
GET_MALLOC_STACK_TRACE;
return hwasan_realloc(ptr, size, &stack);
}
SANITIZER_INTERFACE_ATTRIBUTE
void *__sanitizer_reallocarray(void *ptr, uptr nmemb, uptr size) {
GET_MALLOC_STACK_TRACE;
return hwasan_reallocarray(ptr, nmemb, size, &stack);
}
SANITIZER_INTERFACE_ATTRIBUTE
void *__sanitizer_malloc(uptr size) {
if (UNLIKELY(!hwasan_init_is_running))
ENSURE_HWASAN_INITED();
if (DlsymAlloc::Use())
return DlsymAlloc::Allocate(size);
GET_MALLOC_STACK_TRACE;
return hwasan_malloc(size, &stack);
}
} // extern "C"
#if HWASAN_WITH_INTERCEPTORS || SANITIZER_FUCHSIA
#if SANITIZER_FUCHSIA
// Fuchsia does not use WRAP/wrappers used for the interceptor infrastructure.
# define INTERCEPTOR_ALIAS(RET, FN, ARGS...) \
extern "C" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE RET FN( \
ARGS) ALIAS("__sanitizer_" #FN)
#else
# define INTERCEPTOR_ALIAS(RET, FN, ARGS...) \
extern "C" SANITIZER_INTERFACE_ATTRIBUTE RET WRAP(FN)(ARGS) \
ALIAS("__sanitizer_" #FN); \
extern "C" SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE RET FN( \
ARGS) ALIAS("__sanitizer_" #FN)
#endif
INTERCEPTOR_ALIAS(int, posix_memalign, void **memptr, SIZE_T alignment,
SIZE_T size);
INTERCEPTOR_ALIAS(void *, aligned_alloc, SIZE_T alignment, SIZE_T size);
INTERCEPTOR_ALIAS(void *, __libc_memalign, SIZE_T alignment, SIZE_T size);
INTERCEPTOR_ALIAS(void *, valloc, SIZE_T size);
INTERCEPTOR_ALIAS(void, free, void *ptr);
INTERCEPTOR_ALIAS(uptr, malloc_usable_size, const void *ptr);
INTERCEPTOR_ALIAS(void *, calloc, SIZE_T nmemb, SIZE_T size);
INTERCEPTOR_ALIAS(void *, realloc, void *ptr, SIZE_T size);
INTERCEPTOR_ALIAS(void *, reallocarray, void *ptr, SIZE_T nmemb, SIZE_T size);
INTERCEPTOR_ALIAS(void *, malloc, SIZE_T size);
# if !SANITIZER_FREEBSD && !SANITIZER_NETBSD
INTERCEPTOR_ALIAS(void *, memalign, SIZE_T alignment, SIZE_T size);
INTERCEPTOR_ALIAS(void *, pvalloc, SIZE_T size);
INTERCEPTOR_ALIAS(void, cfree, void *ptr);
INTERCEPTOR_ALIAS(__sanitizer_struct_mallinfo, mallinfo);
INTERCEPTOR_ALIAS(int, mallopt, int cmd, int value);
INTERCEPTOR_ALIAS(void, malloc_stats, void);
# endif
#endif // #if HWASAN_WITH_INTERCEPTORS
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