1 //===-- scudo_malloc.cpp ----------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 ///
9 /// Interceptors for malloc related functions.
10 ///
11 //===----------------------------------------------------------------------===//
12 
13 #include "scudo_allocator.h"
14 
15 #include "interception/interception.h"
16 #include "sanitizer_common/sanitizer_platform_interceptors.h"
17 
18 #include <stddef.h>
19 
20 using namespace __scudo;
21 
22 extern "C" {
23 INTERCEPTOR_ATTRIBUTE void free(void *ptr) {
24   scudoDeallocate(ptr, 0, 0, FromMalloc);
25 }
26 
27 INTERCEPTOR_ATTRIBUTE void *malloc(size_t size) {
28   return scudoAllocate(size, 0, FromMalloc);
29 }
30 
31 INTERCEPTOR_ATTRIBUTE void *realloc(void *ptr, size_t size) {
32   return scudoRealloc(ptr, size);
33 }
34 
35 INTERCEPTOR_ATTRIBUTE void *calloc(size_t nmemb, size_t size) {
36   return scudoCalloc(nmemb, size);
37 }
38 
39 INTERCEPTOR_ATTRIBUTE void *valloc(size_t size) {
40   return scudoValloc(size);
41 }
42 
43 INTERCEPTOR_ATTRIBUTE
44 int posix_memalign(void **memptr, size_t alignment, size_t size) {
45   return scudoPosixMemalign(memptr, alignment, size);
46 }
47 
48 #if SANITIZER_INTERCEPT_CFREE
49 INTERCEPTOR_ATTRIBUTE void cfree(void *ptr) ALIAS("free");
50 #endif
51 
52 #if SANITIZER_INTERCEPT_MEMALIGN
53 INTERCEPTOR_ATTRIBUTE void *memalign(size_t alignment, size_t size) {
54   return scudoAllocate(size, alignment, FromMemalign);
55 }
56 
57 INTERCEPTOR_ATTRIBUTE
58 void *__libc_memalign(size_t alignment, size_t size) ALIAS("memalign");
59 #endif
60 
61 #if SANITIZER_INTERCEPT_PVALLOC
62 INTERCEPTOR_ATTRIBUTE void *pvalloc(size_t size) {
63   return scudoPvalloc(size);
64 }
65 #endif
66 
67 #if SANITIZER_INTERCEPT_ALIGNED_ALLOC
68 INTERCEPTOR_ATTRIBUTE void *aligned_alloc(size_t alignment, size_t size) {
69   return scudoAlignedAlloc(alignment, size);
70 }
71 #endif
72 
73 #if SANITIZER_INTERCEPT_MALLOC_USABLE_SIZE
74 INTERCEPTOR_ATTRIBUTE size_t malloc_usable_size(void *ptr) {
75   return scudoMallocUsableSize(ptr);
76 }
77 #endif
78 
79 #if SANITIZER_INTERCEPT_MALLOPT_AND_MALLINFO
80 INTERCEPTOR_ATTRIBUTE int mallopt(int cmd, int value) {
81   return 0;
82 }
83 #endif
84 }  // extern "C"
85