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| //===-- sanitizer_allocator_testlib.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
//
//===----------------------------------------------------------------------===//
// Malloc replacement library based on CombinedAllocator.
// The primary purpose of this file is an end-to-end integration test
// for CombinedAllocator.
//===----------------------------------------------------------------------===//
/* Usage:
clang++ -std=c++11 -fno-exceptions -g -fPIC -I. -I../include -Isanitizer \
sanitizer_common/tests/sanitizer_allocator_testlib.cpp \
$(\ls sanitizer_common/sanitizer_*.cpp | grep -v sanitizer_common_nolibc.cpp) \
sanitizer_common/sanitizer_linux_x86_64.S \
-shared -lpthread -o testmalloc.so
LD_PRELOAD=`pwd`/testmalloc.so /your/app
*/
#include "sanitizer_common/sanitizer_allocator.h"
#include "sanitizer_common/sanitizer_common.h"
#include <stddef.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#ifndef SANITIZER_MALLOC_HOOK
# define SANITIZER_MALLOC_HOOK(p, s)
#endif
#ifndef SANITIZER_FREE_HOOK
# define SANITIZER_FREE_HOOK(p)
#endif
static const uptr kAllocatorSpace = 0x600000000000ULL;
static const uptr kAllocatorSize = 0x10000000000ULL; // 1T.
struct __AP64 {
static const uptr kSpaceBeg = ~(uptr)0;
static const uptr kSpaceSize = kAllocatorSize;
static const uptr kMetadataSize = 0;
typedef CompactSizeClassMap SizeClassMap;
typedef NoOpMapUnmapCallback MapUnmapCallback;
static const uptr kFlags =
SizeClassAllocator64FlagMasks::kRandomShuffleChunks;
};
namespace {
typedef SizeClassAllocator64<__AP64> PrimaryAllocator;
typedef CombinedAllocator<PrimaryAllocator> Allocator;
typedef Allocator::AllocatorCache AllocatorCache;
static Allocator allocator;
static bool global_inited;
static THREADLOCAL AllocatorCache cache;
static THREADLOCAL bool thread_inited;
static pthread_key_t pkey;
static void thread_dtor(void *v) {
if ((uptr)v != 3) {
pthread_setspecific(pkey, (void*)((uptr)v + 1));
return;
}
allocator.SwallowCache(&cache);
}
static size_t GetRss() {
if (FILE *f = fopen("/proc/self/statm", "r")) {
size_t size = 0, rss = 0;
fscanf(f, "%zd %zd", &size, &rss);
fclose(f);
return rss << 12; // rss is in pages.
}
return 0;
}
struct AtExit {
~AtExit() {
allocator.PrintStats();
Printf("RSS: %zdM\n", GetRss() >> 20);
}
};
static AtExit at_exit;
static void NOINLINE thread_init() {
if (!global_inited) {
global_inited = true;
allocator.Init(false /*may_return_null*/);
pthread_key_create(&pkey, thread_dtor);
}
thread_inited = true;
pthread_setspecific(pkey, (void*)1);
cache.Init(nullptr);
}
} // namespace
extern "C" {
void *malloc(size_t size) {
if (UNLIKELY(!thread_inited))
thread_init();
void *p = allocator.Allocate(&cache, size, 8);
SANITIZER_MALLOC_HOOK(p, size);
return p;
}
void free(void *p) {
if (UNLIKELY(!thread_inited))
thread_init();
SANITIZER_FREE_HOOK(p);
allocator.Deallocate(&cache, p);
}
void *calloc(size_t nmemb, size_t size) {
if (UNLIKELY(!thread_inited))
thread_init();
size *= nmemb;
void *p = allocator.Allocate(&cache, size, 8, false);
memset(p, 0, size);
SANITIZER_MALLOC_HOOK(p, size);
return p;
}
void *realloc(void *p, size_t size) {
if (UNLIKELY(!thread_inited))
thread_init();
if (p) {
SANITIZER_FREE_HOOK(p);
}
p = allocator.Reallocate(&cache, p, size, 8);
if (p) {
SANITIZER_MALLOC_HOOK(p, size);
}
return p;
}
#if SANITIZER_INTERCEPT_MEMALIGN
void *memalign(size_t alignment, size_t size) {
if (UNLIKELY(!thread_inited))
thread_init();
void *p = allocator.Allocate(&cache, size, alignment);
SANITIZER_MALLOC_HOOK(p, size);
return p;
}
#endif // SANITIZER_INTERCEPT_MEMALIGN
int posix_memalign(void **memptr, size_t alignment, size_t size) {
if (UNLIKELY(!thread_inited))
thread_init();
*memptr = allocator.Allocate(&cache, size, alignment);
SANITIZER_MALLOC_HOOK(*memptr, size);
return 0;
}
void *valloc(size_t size) {
if (UNLIKELY(!thread_inited))
thread_init();
if (size == 0)
size = GetPageSizeCached();
void *p = allocator.Allocate(&cache, size, GetPageSizeCached());
SANITIZER_MALLOC_HOOK(p, size);
return p;
}
#if SANITIZER_INTERCEPT_CFREE
void cfree(void *p) ALIAS("free");
#endif // SANITIZER_INTERCEPT_CFREE
#if SANITIZER_INTERCEPT_PVALLOC
void *pvalloc(size_t size) ALIAS("valloc");
#endif // SANITIZER_INTERCEPT_PVALLOC
#if SANITIZER_INTERCEPT_MEMALIGN
void *__libc_memalign(size_t alignment, size_t size) ALIAS("memalign");
#endif // SANITIZER_INTERCEPT_MEMALIGN
void malloc_usable_size() {
}
#if SANITIZER_INTERCEPT_MALLOPT_AND_MALLINFO
void mallinfo() {
}
void mallopt() {
}
#endif // SANITIZER_INTERCEPT_MALLOPT_AND_MALLINFO
} // extern "C"
namespace std {
struct nothrow_t;
}
void *operator new(size_t size) ALIAS("malloc");
void *operator new[](size_t size) ALIAS("malloc");
void *operator new(size_t size, std::nothrow_t const&) ALIAS("malloc");
void *operator new[](size_t size, std::nothrow_t const&) ALIAS("malloc");
void operator delete(void *ptr) throw() ALIAS("free");
void operator delete[](void *ptr) throw() ALIAS("free");
void operator delete(void *ptr, std::nothrow_t const&) ALIAS("free");
void operator delete[](void *ptr, std::nothrow_t const&) ALIAS("free");
|