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79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//===-- sanitizer_allocator.h -----------------------------------*- C++ -*-===//
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Specialized memory allocator for ThreadSanitizer, MemorySanitizer, etc.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SANITIZER_ALLOCATOR_H
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#define SANITIZER_ALLOCATOR_H
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#include "sanitizer_internal_defs.h"
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#include "sanitizer_common.h"
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#include "sanitizer_libc.h"
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#include "sanitizer_list.h"
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#include "sanitizer_mutex.h"
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#include "sanitizer_lfstack.h"
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#include "sanitizer_procmaps.h"
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namespace __sanitizer {
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// Allows the tools to name their allocations appropriately.
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extern const char *PrimaryAllocatorName;
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extern const char *SecondaryAllocatorName;
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// Since flags are immutable and allocator behavior can be changed at runtime
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// (unit tests or ASan on Android are some examples), allocator_may_return_null
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// flag value is cached here and can be altered later.
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bool AllocatorMayReturnNull();
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void SetAllocatorMayReturnNull(bool may_return_null);
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// Returns true if allocator detected OOM condition. Can be used to avoid memory
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// hungry operations.
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bool IsAllocatorOutOfMemory();
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// Should be called by a particular allocator when OOM is detected.
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void SetAllocatorOutOfMemory();
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void PrintHintAllocatorCannotReturnNull();
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// Allocators call these callbacks on mmap/munmap.
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struct NoOpMapUnmapCallback {
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void OnMap(uptr p, uptr size) const { }
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void OnUnmap(uptr p, uptr size) const { }
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};
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// Callback type for iterating over chunks.
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typedef void (*ForEachChunkCallback)(uptr chunk, void *arg);
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INLINE u32 Rand(u32 *state) { // ANSI C linear congruential PRNG.
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return (*state = *state * 1103515245 + 12345) >> 16;
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}
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INLINE u32 RandN(u32 *state, u32 n) { return Rand(state) % n; } // [0, n)
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template<typename T>
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INLINE void RandomShuffle(T *a, u32 n, u32 *rand_state) {
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if (n <= 1) return;
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u32 state = *rand_state;
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for (u32 i = n - 1; i > 0; i--)
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Swap(a[i], a[RandN(&state, i + 1)]);
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*rand_state = state;
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}
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#include "sanitizer_allocator_size_class_map.h"
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#include "sanitizer_allocator_stats.h"
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#include "sanitizer_allocator_primary64.h"
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#include "sanitizer_allocator_bytemap.h"
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#include "sanitizer_allocator_primary32.h"
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#include "sanitizer_allocator_local_cache.h"
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#include "sanitizer_allocator_secondary.h"
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#include "sanitizer_allocator_combined.h"
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} // namespace __sanitizer
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#endif // SANITIZER_ALLOCATOR_H
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