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//===-- sanitizer_allocator.h -----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Specialized memory allocator for ThreadSanitizer, MemorySanitizer, etc.
//
//===----------------------------------------------------------------------===//
#ifndef SANITIZER_ALLOCATOR_H
#define SANITIZER_ALLOCATOR_H
#include "sanitizer_internal_defs.h"
#include "sanitizer_common.h"
#include "sanitizer_libc.h"
#include "sanitizer_list.h"
#include "sanitizer_mutex.h"
#include "sanitizer_lfstack.h"
#include "sanitizer_procmaps.h"
namespace __sanitizer {
// Since flags are immutable and allocator behavior can be changed at runtime
// (unit tests or ASan on Android are some examples), allocator_may_return_null
// flag value is cached here and can be altered later.
bool AllocatorMayReturnNull();
void SetAllocatorMayReturnNull(bool may_return_null);
// Allocator failure handling policies:
// Implements AllocatorMayReturnNull policy, returns null when the flag is set,
// dies otherwise.
struct ReturnNullOrDieOnFailure {
static void *OnBadRequest();
static void *OnOOM();
};
// Always dies on the failure.
struct DieOnFailure {
static void *OnBadRequest();
static void *OnOOM();
};
// Returns true if allocator detected OOM condition. Can be used to avoid memory
// hungry operations. Set when AllocatorReturnNullOrDieOnOOM() is called.
bool IsAllocatorOutOfMemory();
// Allocators call these callbacks on mmap/munmap.
struct NoOpMapUnmapCallback {
void OnMap(uptr p, uptr size) const { }
void OnUnmap(uptr p, uptr size) const { }
};
// Callback type for iterating over chunks.
typedef void (*ForEachChunkCallback)(uptr chunk, void *arg);
// Returns true if calloc(size, n) should return 0 due to overflow in size*n.
bool CallocShouldReturnNullDueToOverflow(uptr size, uptr n);
#include "sanitizer_allocator_size_class_map.h"
#include "sanitizer_allocator_stats.h"
#include "sanitizer_allocator_primary64.h"
#include "sanitizer_allocator_bytemap.h"
#include "sanitizer_allocator_primary32.h"
#include "sanitizer_allocator_local_cache.h"
#include "sanitizer_allocator_secondary.h"
#include "sanitizer_allocator_combined.h"
} // namespace __sanitizer
#endif // SANITIZER_ALLOCATOR_H
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