1 //===-- scudo_malloc.cpp ----------------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// Interceptors for malloc related functions.
11 ///
12 //===----------------------------------------------------------------------===//
13 
14 #include "scudo_allocator.h"
15 
16 #include "interception/interception.h"
17 #include "sanitizer_common/sanitizer_platform_interceptors.h"
18 
19 #include <stddef.h>
20 
21 using namespace __scudo;
22 
23 extern "C" {
24 INTERCEPTOR_ATTRIBUTE void free(void *ptr) {
25   scudoDeallocate(ptr, 0, 0, FromMalloc);
26 }
27 
28 INTERCEPTOR_ATTRIBUTE void *malloc(size_t size) {
29   return scudoAllocate(size, 0, FromMalloc);
30 }
31 
32 INTERCEPTOR_ATTRIBUTE void *realloc(void *ptr, size_t size) {
33   return scudoRealloc(ptr, size);
34 }
35 
36 INTERCEPTOR_ATTRIBUTE void *calloc(size_t nmemb, size_t size) {
37   return scudoCalloc(nmemb, size);
38 }
39 
40 INTERCEPTOR_ATTRIBUTE void *valloc(size_t size) {
41   return scudoValloc(size);
42 }
43 
44 INTERCEPTOR_ATTRIBUTE
45 int posix_memalign(void **memptr, size_t alignment, size_t size) {
46   return scudoPosixMemalign(memptr, alignment, size);
47 }
48 
49 #if SANITIZER_INTERCEPT_CFREE
50 INTERCEPTOR_ATTRIBUTE void cfree(void *ptr) ALIAS("free");
51 #endif
52 
53 #if SANITIZER_INTERCEPT_MEMALIGN
54 INTERCEPTOR_ATTRIBUTE void *memalign(size_t alignment, size_t size) {
55   return scudoAllocate(size, alignment, FromMemalign);
56 }
57 
58 INTERCEPTOR_ATTRIBUTE
59 void *__libc_memalign(size_t alignment, size_t size) ALIAS("memalign");
60 #endif
61 
62 #if SANITIZER_INTERCEPT_PVALLOC
63 INTERCEPTOR_ATTRIBUTE void *pvalloc(size_t size) {
64   return scudoPvalloc(size);
65 }
66 #endif
67 
68 #if SANITIZER_INTERCEPT_ALIGNED_ALLOC
69 INTERCEPTOR_ATTRIBUTE void *aligned_alloc(size_t alignment, size_t size) {
70   return scudoAlignedAlloc(alignment, size);
71 }
72 #endif
73 
74 #if SANITIZER_INTERCEPT_MALLOC_USABLE_SIZE
75 INTERCEPTOR_ATTRIBUTE size_t malloc_usable_size(void *ptr) {
76   return scudoMallocUsableSize(ptr);
77 }
78 #endif
79 
80 #if SANITIZER_INTERCEPT_MALLOPT_AND_MALLINFO
81 INTERCEPTOR_ATTRIBUTE int mallopt(int cmd, int value) {
82   return 0;
83 }
84 #endif
85 }  // extern "C"
86