compiler-rt/lib/sanitizer_common/tests/sanitizer_allocator_testlib.cpp

   1 //===-- sanitizer_allocator_testlib.cpp -----------------------------------===//
   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 // Malloc replacement library based on CombinedAllocator.
   9 // The primary purpose of this file is an end-to-end integration test
  10 // for CombinedAllocator.
  11 //===----------------------------------------------------------------------===//
  12 /* Usage:
  13 clang++ -std=c++11 -fno-exceptions  -g -fPIC -I. -I../include -Isanitizer \
  14  sanitizer_common/tests/sanitizer_allocator_testlib.cpp \
  15  $(\ls sanitizer_common/sanitizer_*.cpp | grep -v sanitizer_common_nolibc.cpp) \
  16   sanitizer_common/sanitizer_linux_x86_64.S \
  17  -shared -lpthread -o testmalloc.so
  18 LD_PRELOAD=`pwd`/testmalloc.so /your/app
  19 */
  20 #include "sanitizer_common/sanitizer_allocator.h"
  21 #include "sanitizer_common/sanitizer_common.h"
  22 #include <stddef.h>
  23 #include <stdio.h>
  24 #include <unistd.h>
  25 #include <string.h>
  26 #include <pthread.h>
  27
  28 #ifndef SANITIZER_MALLOC_HOOK
  29 # define SANITIZER_MALLOC_HOOK(p, s)
  30 #endif
  31
  32 #ifndef SANITIZER_FREE_HOOK
  33 # define SANITIZER_FREE_HOOK(p)
  34 #endif
  35
  36 static const uptr kAllocatorSpace = 0x600000000000ULL;
  37 static const uptr kAllocatorSize  =  0x10000000000ULL;  // 1T.
  38
  39 struct __AP64 {
  40   static const uptr kSpaceBeg = ~(uptr)0;
  41   static const uptr kSpaceSize = kAllocatorSize;
  42   static const uptr kMetadataSize = 0;
  43   typedef CompactSizeClassMap SizeClassMap;
  44   typedef NoOpMapUnmapCallback MapUnmapCallback;
  45   static const uptr kFlags =
  46       SizeClassAllocator64FlagMasks::kRandomShuffleChunks;
  47 };
  48
  49 namespace {
  50
  51 typedef SizeClassAllocator64<__AP64> PrimaryAllocator;
  52 typedef CombinedAllocator<PrimaryAllocator> Allocator;
  53 typedef Allocator::AllocatorCache AllocatorCache;
  54
  55 static Allocator allocator;
  56 static bool global_inited;
  57 static THREADLOCAL AllocatorCache cache;
  58 static THREADLOCAL bool thread_inited;
  59 static pthread_key_t pkey;
  60
  61 static void thread_dtor(void *v) {
  62   if ((uptr)v != 3) {
  63     pthread_setspecific(pkey, (void*)((uptr)v + 1));
  64     return;
  65   }
  66   allocator.SwallowCache(&cache);
  67 }
  68
  69 static size_t GetRss() {
  70   if (FILE *f = fopen("/proc/self/statm", "r")) {
  71     size_t size = 0, rss = 0;
  72     fscanf(f, "%zd %zd", &size, &rss);
  73     fclose(f);
  74     return rss << 12;  // rss is in pages.
  75   }
  76   return 0;
  77 }
  78
  79 struct AtExit {
  80   ~AtExit() {
  81     allocator.PrintStats();
  82     Printf("RSS: %zdM\n", GetRss() >> 20);
  83   }
  84 };
  85
  86 static AtExit at_exit;
  87
  88 static void NOINLINE thread_init() {
  89   if (!global_inited) {
  90     global_inited = true;
  91     allocator.Init(false /*may_return_null*/);
  92     pthread_key_create(&pkey, thread_dtor);
  93   }
  94   thread_inited = true;
  95   pthread_setspecific(pkey, (void*)1);
  96   cache.Init(nullptr);
  97 }
  98 }  // namespace
  99
 100 extern "C" {
 101 void *malloc(size_t size) {
 102   if (UNLIKELY(!thread_inited))
 103     thread_init();
 104   void *p = allocator.Allocate(&cache, size, 8);
 105   SANITIZER_MALLOC_HOOK(p, size);
 106   return p;
 107 }
 108
 109 void free(void *p) {
 110   if (UNLIKELY(!thread_inited))
 111     thread_init();
 112   SANITIZER_FREE_HOOK(p);
 113   allocator.Deallocate(&cache, p);
 114 }
 115
 116 void *calloc(size_t nmemb, size_t size) {
 117   if (UNLIKELY(!thread_inited))
 118     thread_init();
 119   size *= nmemb;
 120   void *p = allocator.Allocate(&cache, size, 8, false);
 121   memset(p, 0, size);
 122   SANITIZER_MALLOC_HOOK(p, size);
 123   return p;
 124 }
 125
 126 void *realloc(void *p, size_t size) {
 127   if (UNLIKELY(!thread_inited))
 128     thread_init();
 129   if (p) {
 130     SANITIZER_FREE_HOOK(p);
 131   }
 132   p = allocator.Reallocate(&cache, p, size, 8);
 133   if (p) {
 134     SANITIZER_MALLOC_HOOK(p, size);
 135   }
 136   return p;
 137 }
 138
 139 #if SANITIZER_INTERCEPT_MEMALIGN
 140 void *memalign(size_t alignment, size_t size) {
 141   if (UNLIKELY(!thread_inited))
 142     thread_init();
 143   void *p = allocator.Allocate(&cache, size, alignment);
 144   SANITIZER_MALLOC_HOOK(p, size);
 145   return p;
 146 }
 147 #endif // SANITIZER_INTERCEPT_MEMALIGN
 148
 149 int posix_memalign(void **memptr, size_t alignment, size_t size) {
 150   if (UNLIKELY(!thread_inited))
 151     thread_init();
 152   *memptr = allocator.Allocate(&cache, size, alignment);
 153   SANITIZER_MALLOC_HOOK(*memptr, size);
 154   return 0;
 155 }
 156
 157 void *valloc(size_t size) {
 158   if (UNLIKELY(!thread_inited))
 159     thread_init();
 160   if (size == 0)
 161     size = GetPageSizeCached();
 162   void *p = allocator.Allocate(&cache, size, GetPageSizeCached());
 163   SANITIZER_MALLOC_HOOK(p, size);
 164   return p;
 165 }
 166
 167 #if SANITIZER_INTERCEPT_CFREE
 168 void cfree(void *p) ALIAS("free");
 169 #endif // SANITIZER_INTERCEPT_CFREE
 170 #if SANITIZER_INTERCEPT_PVALLOC
 171 void *pvalloc(size_t size) ALIAS("valloc");
 172 #endif // SANITIZER_INTERCEPT_PVALLOC
 173 #if SANITIZER_INTERCEPT_MEMALIGN
 174 void *__libc_memalign(size_t alignment, size_t size) ALIAS("memalign");
 175 #endif // SANITIZER_INTERCEPT_MEMALIGN
 176
 177 void malloc_usable_size() {
 178 }
 179
 180 #if SANITIZER_INTERCEPT_MALLOPT_AND_MALLINFO
 181 void mallinfo() {
 182 }
 183
 184 void mallopt() {
 185 }
 186 #endif // SANITIZER_INTERCEPT_MALLOPT_AND_MALLINFO
 187 }  // extern "C"
 188
 189 namespace std {
 190   struct nothrow_t;
 191 }
 192
 193 void *operator new(size_t size) ALIAS("malloc");
 194 void *operator new[](size_t size) ALIAS("malloc");
 195 void *operator new(size_t size, std::nothrow_t const&) ALIAS("malloc");
 196 void *operator new[](size_t size, std::nothrow_t const&) ALIAS("malloc");
 197 void operator delete(void *ptr) throw() ALIAS("free");
 198 void operator delete[](void *ptr) throw() ALIAS("free");
 199 void operator delete(void *ptr, std::nothrow_t const&) ALIAS("free");
 200 void operator delete[](void *ptr, std::nothrow_t const&) ALIAS("free");