b667dd7017
2019-08-14 Martin Liska <mliska@suse.cz> PR sanitizer/89832 PR sanitizer/91325 * All source files: Merge from upstream 368656. From-SVN: r274426
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
//===-- sanitizer_allocator.h -----------------------------------*- C++ -*-===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Specialized memory allocator for ThreadSanitizer, MemorySanitizer, etc.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SANITIZER_ALLOCATOR_H
|
|
#define SANITIZER_ALLOCATOR_H
|
|
|
|
#include "sanitizer_common.h"
|
|
#include "sanitizer_internal_defs.h"
|
|
#include "sanitizer_lfstack.h"
|
|
#include "sanitizer_libc.h"
|
|
#include "sanitizer_list.h"
|
|
#include "sanitizer_local_address_space_view.h"
|
|
#include "sanitizer_mutex.h"
|
|
#include "sanitizer_procmaps.h"
|
|
#include "sanitizer_type_traits.h"
|
|
|
|
namespace __sanitizer {
|
|
|
|
// Allows the tools to name their allocations appropriately.
|
|
extern const char *PrimaryAllocatorName;
|
|
extern const char *SecondaryAllocatorName;
|
|
|
|
// 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);
|
|
|
|
// Returns true if allocator detected OOM condition. Can be used to avoid memory
|
|
// hungry operations.
|
|
bool IsAllocatorOutOfMemory();
|
|
// Should be called by a particular allocator when OOM is detected.
|
|
void SetAllocatorOutOfMemory();
|
|
|
|
void PrintHintAllocatorCannotReturnNull();
|
|
|
|
// 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);
|
|
|
|
INLINE u32 Rand(u32 *state) { // ANSI C linear congruential PRNG.
|
|
return (*state = *state * 1103515245 + 12345) >> 16;
|
|
}
|
|
|
|
INLINE u32 RandN(u32 *state, u32 n) { return Rand(state) % n; } // [0, n)
|
|
|
|
template<typename T>
|
|
INLINE void RandomShuffle(T *a, u32 n, u32 *rand_state) {
|
|
if (n <= 1) return;
|
|
u32 state = *rand_state;
|
|
for (u32 i = n - 1; i > 0; i--)
|
|
Swap(a[i], a[RandN(&state, i + 1)]);
|
|
*rand_state = state;
|
|
}
|
|
|
|
#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
|