forked from OSchip/llvm-project
726 lines
24 KiB
C++
726 lines
24 KiB
C++
//===-- memprof_allocator.cpp --------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of MemProfiler, a memory profiler.
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//
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// Implementation of MemProf's memory allocator, which uses the allocator
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// from sanitizer_common.
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//
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//===----------------------------------------------------------------------===//
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#include "memprof_allocator.h"
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#include "memprof_mapping.h"
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#include "memprof_mibmap.h"
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#include "memprof_rawprofile.h"
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#include "memprof_stack.h"
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#include "memprof_thread.h"
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#include "profile/MemProfData.inc"
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#include "sanitizer_common/sanitizer_allocator_checks.h"
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#include "sanitizer_common/sanitizer_allocator_interface.h"
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#include "sanitizer_common/sanitizer_allocator_report.h"
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#include "sanitizer_common/sanitizer_errno.h"
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#include "sanitizer_common/sanitizer_file.h"
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#include "sanitizer_common/sanitizer_flags.h"
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include "sanitizer_common/sanitizer_list.h"
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#include "sanitizer_common/sanitizer_procmaps.h"
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#include "sanitizer_common/sanitizer_stackdepot.h"
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#include "sanitizer_common/sanitizer_vector.h"
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#include <sched.h>
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#include <time.h>
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namespace __memprof {
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namespace {
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using ::llvm::memprof::MemInfoBlock;
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void Print(const MemInfoBlock &M, const u64 id, bool print_terse) {
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u64 p;
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if (print_terse) {
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p = M.total_size * 100 / M.alloc_count;
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Printf("MIB:%llu/%u/%llu.%02llu/%u/%u/", id, M.alloc_count, p / 100,
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p % 100, M.min_size, M.max_size);
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p = M.total_access_count * 100 / M.alloc_count;
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Printf("%llu.%02llu/%llu/%llu/", p / 100, p % 100, M.min_access_count,
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M.max_access_count);
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p = M.total_lifetime * 100 / M.alloc_count;
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Printf("%llu.%02llu/%u/%u/", p / 100, p % 100, M.min_lifetime,
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M.max_lifetime);
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Printf("%u/%u/%u/%u\n", M.num_migrated_cpu, M.num_lifetime_overlaps,
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M.num_same_alloc_cpu, M.num_same_dealloc_cpu);
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} else {
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p = M.total_size * 100 / M.alloc_count;
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Printf("Memory allocation stack id = %llu\n", id);
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Printf("\talloc_count %u, size (ave/min/max) %llu.%02llu / %u / %u\n",
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M.alloc_count, p / 100, p % 100, M.min_size, M.max_size);
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p = M.total_access_count * 100 / M.alloc_count;
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Printf("\taccess_count (ave/min/max): %llu.%02llu / %llu / %llu\n", p / 100,
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p % 100, M.min_access_count, M.max_access_count);
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p = M.total_lifetime * 100 / M.alloc_count;
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Printf("\tlifetime (ave/min/max): %llu.%02llu / %u / %u\n", p / 100,
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p % 100, M.min_lifetime, M.max_lifetime);
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Printf("\tnum migrated: %u, num lifetime overlaps: %u, num same alloc "
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"cpu: %u, num same dealloc_cpu: %u\n",
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M.num_migrated_cpu, M.num_lifetime_overlaps, M.num_same_alloc_cpu,
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M.num_same_dealloc_cpu);
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}
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}
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} // namespace
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static int GetCpuId(void) {
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// _memprof_preinit is called via the preinit_array, which subsequently calls
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// malloc. Since this is before _dl_init calls VDSO_SETUP, sched_getcpu
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// will seg fault as the address of __vdso_getcpu will be null.
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if (!memprof_init_done)
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return -1;
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return sched_getcpu();
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}
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// Compute the timestamp in ms.
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static int GetTimestamp(void) {
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// timespec_get will segfault if called from dl_init
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if (!memprof_timestamp_inited) {
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// By returning 0, this will be effectively treated as being
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// timestamped at memprof init time (when memprof_init_timestamp_s
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// is initialized).
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return 0;
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}
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timespec ts;
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clock_gettime(CLOCK_REALTIME, &ts);
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return (ts.tv_sec - memprof_init_timestamp_s) * 1000 + ts.tv_nsec / 1000000;
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}
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static MemprofAllocator &get_allocator();
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// The memory chunk allocated from the underlying allocator looks like this:
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// H H U U U U U U
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// H -- ChunkHeader (32 bytes)
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// U -- user memory.
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// If there is left padding before the ChunkHeader (due to use of memalign),
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// we store a magic value in the first uptr word of the memory block and
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// store the address of ChunkHeader in the next uptr.
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// M B L L L L L L L L L H H U U U U U U
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// | ^
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// ---------------------|
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// M -- magic value kAllocBegMagic
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// B -- address of ChunkHeader pointing to the first 'H'
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constexpr uptr kMaxAllowedMallocBits = 40;
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// Should be no more than 32-bytes
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struct ChunkHeader {
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// 1-st 4 bytes.
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u32 alloc_context_id;
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// 2-nd 4 bytes
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u32 cpu_id;
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// 3-rd 4 bytes
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u32 timestamp_ms;
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// 4-th 4 bytes
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// Note only 1 bit is needed for this flag if we need space in the future for
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// more fields.
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u32 from_memalign;
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// 5-th and 6-th 4 bytes
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// The max size of an allocation is 2^40 (kMaxAllowedMallocSize), so this
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// could be shrunk to kMaxAllowedMallocBits if we need space in the future for
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// more fields.
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atomic_uint64_t user_requested_size;
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// 23 bits available
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// 7-th and 8-th 4 bytes
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u64 data_type_id; // TODO: hash of type name
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};
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static const uptr kChunkHeaderSize = sizeof(ChunkHeader);
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COMPILER_CHECK(kChunkHeaderSize == 32);
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struct MemprofChunk : ChunkHeader {
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uptr Beg() { return reinterpret_cast<uptr>(this) + kChunkHeaderSize; }
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uptr UsedSize() {
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return atomic_load(&user_requested_size, memory_order_relaxed);
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}
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void *AllocBeg() {
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if (from_memalign)
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return get_allocator().GetBlockBegin(reinterpret_cast<void *>(this));
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return reinterpret_cast<void *>(this);
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}
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};
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class LargeChunkHeader {
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static constexpr uptr kAllocBegMagic =
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FIRST_32_SECOND_64(0xCC6E96B9, 0xCC6E96B9CC6E96B9ULL);
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atomic_uintptr_t magic;
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MemprofChunk *chunk_header;
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public:
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MemprofChunk *Get() const {
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return atomic_load(&magic, memory_order_acquire) == kAllocBegMagic
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? chunk_header
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: nullptr;
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}
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void Set(MemprofChunk *p) {
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if (p) {
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chunk_header = p;
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atomic_store(&magic, kAllocBegMagic, memory_order_release);
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return;
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}
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uptr old = kAllocBegMagic;
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if (!atomic_compare_exchange_strong(&magic, &old, 0,
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memory_order_release)) {
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CHECK_EQ(old, kAllocBegMagic);
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}
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}
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};
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void FlushUnneededMemProfShadowMemory(uptr p, uptr size) {
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// Since memprof's mapping is compacting, the shadow chunk may be
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// not page-aligned, so we only flush the page-aligned portion.
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ReleaseMemoryPagesToOS(MemToShadow(p), MemToShadow(p + size));
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}
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void MemprofMapUnmapCallback::OnMap(uptr p, uptr size) const {
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// Statistics.
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MemprofStats &thread_stats = GetCurrentThreadStats();
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thread_stats.mmaps++;
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thread_stats.mmaped += size;
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}
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void MemprofMapUnmapCallback::OnUnmap(uptr p, uptr size) const {
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// We are about to unmap a chunk of user memory.
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// Mark the corresponding shadow memory as not needed.
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FlushUnneededMemProfShadowMemory(p, size);
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// Statistics.
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MemprofStats &thread_stats = GetCurrentThreadStats();
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thread_stats.munmaps++;
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thread_stats.munmaped += size;
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}
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AllocatorCache *GetAllocatorCache(MemprofThreadLocalMallocStorage *ms) {
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CHECK(ms);
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return &ms->allocator_cache;
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}
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// Accumulates the access count from the shadow for the given pointer and size.
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u64 GetShadowCount(uptr p, u32 size) {
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u64 *shadow = (u64 *)MEM_TO_SHADOW(p);
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u64 *shadow_end = (u64 *)MEM_TO_SHADOW(p + size);
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u64 count = 0;
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for (; shadow <= shadow_end; shadow++)
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count += *shadow;
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return count;
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}
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// Clears the shadow counters (when memory is allocated).
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void ClearShadow(uptr addr, uptr size) {
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CHECK(AddrIsAlignedByGranularity(addr));
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CHECK(AddrIsInMem(addr));
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CHECK(AddrIsAlignedByGranularity(addr + size));
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CHECK(AddrIsInMem(addr + size - SHADOW_GRANULARITY));
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CHECK(REAL(memset));
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uptr shadow_beg = MEM_TO_SHADOW(addr);
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uptr shadow_end = MEM_TO_SHADOW(addr + size - SHADOW_GRANULARITY) + 1;
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if (shadow_end - shadow_beg < common_flags()->clear_shadow_mmap_threshold) {
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REAL(memset)((void *)shadow_beg, 0, shadow_end - shadow_beg);
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} else {
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uptr page_size = GetPageSizeCached();
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uptr page_beg = RoundUpTo(shadow_beg, page_size);
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uptr page_end = RoundDownTo(shadow_end, page_size);
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if (page_beg >= page_end) {
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REAL(memset)((void *)shadow_beg, 0, shadow_end - shadow_beg);
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} else {
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if (page_beg != shadow_beg) {
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REAL(memset)((void *)shadow_beg, 0, page_beg - shadow_beg);
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}
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if (page_end != shadow_end) {
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REAL(memset)((void *)page_end, 0, shadow_end - page_end);
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}
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ReserveShadowMemoryRange(page_beg, page_end - 1, nullptr);
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}
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}
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}
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struct Allocator {
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static const uptr kMaxAllowedMallocSize = 1ULL << kMaxAllowedMallocBits;
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MemprofAllocator allocator;
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StaticSpinMutex fallback_mutex;
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AllocatorCache fallback_allocator_cache;
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uptr max_user_defined_malloc_size;
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// Holds the mapping of stack ids to MemInfoBlocks.
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MIBMapTy MIBMap;
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atomic_uint8_t destructing;
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atomic_uint8_t constructed;
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bool print_text;
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// ------------------- Initialization ------------------------
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explicit Allocator(LinkerInitialized) : print_text(flags()->print_text) {
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atomic_store_relaxed(&destructing, 0);
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atomic_store_relaxed(&constructed, 1);
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}
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~Allocator() {
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atomic_store_relaxed(&destructing, 1);
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FinishAndWrite();
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}
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static void PrintCallback(const uptr Key, LockedMemInfoBlock *const &Value,
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void *Arg) {
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SpinMutexLock(&Value->mutex);
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Print(Value->mib, Key, bool(Arg));
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}
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void FinishAndWrite() {
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if (print_text && common_flags()->print_module_map)
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DumpProcessMap();
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allocator.ForceLock();
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InsertLiveBlocks();
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if (print_text) {
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if (!flags()->print_terse)
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Printf("Recorded MIBs (incl. live on exit):\n");
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MIBMap.ForEach(PrintCallback,
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reinterpret_cast<void *>(flags()->print_terse));
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StackDepotPrintAll();
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} else {
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// Serialize the contents to a raw profile. Format documented in
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// memprof_rawprofile.h.
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char *Buffer = nullptr;
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MemoryMappingLayout Layout(/*cache_enabled=*/true);
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u64 BytesSerialized = SerializeToRawProfile(MIBMap, Layout, Buffer);
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CHECK(Buffer && BytesSerialized && "could not serialize to buffer");
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report_file.Write(Buffer, BytesSerialized);
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}
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allocator.ForceUnlock();
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}
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// Inserts any blocks which have been allocated but not yet deallocated.
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void InsertLiveBlocks() {
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allocator.ForEachChunk(
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[](uptr chunk, void *alloc) {
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u64 user_requested_size;
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Allocator *A = (Allocator *)alloc;
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MemprofChunk *m =
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A->GetMemprofChunk((void *)chunk, user_requested_size);
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if (!m)
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return;
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uptr user_beg = ((uptr)m) + kChunkHeaderSize;
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u64 c = GetShadowCount(user_beg, user_requested_size);
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long curtime = GetTimestamp();
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MemInfoBlock newMIB(user_requested_size, c, m->timestamp_ms, curtime,
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m->cpu_id, GetCpuId());
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InsertOrMerge(m->alloc_context_id, newMIB, A->MIBMap);
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},
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this);
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}
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void InitLinkerInitialized() {
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SetAllocatorMayReturnNull(common_flags()->allocator_may_return_null);
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allocator.InitLinkerInitialized(
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common_flags()->allocator_release_to_os_interval_ms);
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max_user_defined_malloc_size = common_flags()->max_allocation_size_mb
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? common_flags()->max_allocation_size_mb
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<< 20
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: kMaxAllowedMallocSize;
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}
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// -------------------- Allocation/Deallocation routines ---------------
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void *Allocate(uptr size, uptr alignment, BufferedStackTrace *stack,
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AllocType alloc_type) {
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if (UNLIKELY(!memprof_inited))
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MemprofInitFromRtl();
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if (UNLIKELY(IsRssLimitExceeded())) {
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if (AllocatorMayReturnNull())
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return nullptr;
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ReportRssLimitExceeded(stack);
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}
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CHECK(stack);
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const uptr min_alignment = MEMPROF_ALIGNMENT;
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if (alignment < min_alignment)
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alignment = min_alignment;
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if (size == 0) {
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// We'd be happy to avoid allocating memory for zero-size requests, but
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// some programs/tests depend on this behavior and assume that malloc
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// would not return NULL even for zero-size allocations. Moreover, it
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// looks like operator new should never return NULL, and results of
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// consecutive "new" calls must be different even if the allocated size
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// is zero.
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size = 1;
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}
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CHECK(IsPowerOfTwo(alignment));
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uptr rounded_size = RoundUpTo(size, alignment);
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uptr needed_size = rounded_size + kChunkHeaderSize;
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if (alignment > min_alignment)
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needed_size += alignment;
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CHECK(IsAligned(needed_size, min_alignment));
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if (size > kMaxAllowedMallocSize || needed_size > kMaxAllowedMallocSize ||
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size > max_user_defined_malloc_size) {
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if (AllocatorMayReturnNull()) {
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Report("WARNING: MemProfiler failed to allocate 0x%zx bytes\n", size);
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return nullptr;
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}
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uptr malloc_limit =
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Min(kMaxAllowedMallocSize, max_user_defined_malloc_size);
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ReportAllocationSizeTooBig(size, malloc_limit, stack);
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}
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MemprofThread *t = GetCurrentThread();
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void *allocated;
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if (t) {
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AllocatorCache *cache = GetAllocatorCache(&t->malloc_storage());
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allocated = allocator.Allocate(cache, needed_size, 8);
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} else {
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SpinMutexLock l(&fallback_mutex);
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AllocatorCache *cache = &fallback_allocator_cache;
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allocated = allocator.Allocate(cache, needed_size, 8);
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}
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if (UNLIKELY(!allocated)) {
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SetAllocatorOutOfMemory();
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if (AllocatorMayReturnNull())
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return nullptr;
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ReportOutOfMemory(size, stack);
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}
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uptr alloc_beg = reinterpret_cast<uptr>(allocated);
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uptr alloc_end = alloc_beg + needed_size;
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uptr beg_plus_header = alloc_beg + kChunkHeaderSize;
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uptr user_beg = beg_plus_header;
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if (!IsAligned(user_beg, alignment))
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user_beg = RoundUpTo(user_beg, alignment);
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uptr user_end = user_beg + size;
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CHECK_LE(user_end, alloc_end);
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uptr chunk_beg = user_beg - kChunkHeaderSize;
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MemprofChunk *m = reinterpret_cast<MemprofChunk *>(chunk_beg);
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m->from_memalign = alloc_beg != chunk_beg;
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CHECK(size);
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m->cpu_id = GetCpuId();
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m->timestamp_ms = GetTimestamp();
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m->alloc_context_id = StackDepotPut(*stack);
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uptr size_rounded_down_to_granularity =
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RoundDownTo(size, SHADOW_GRANULARITY);
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if (size_rounded_down_to_granularity)
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ClearShadow(user_beg, size_rounded_down_to_granularity);
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MemprofStats &thread_stats = GetCurrentThreadStats();
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thread_stats.mallocs++;
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thread_stats.malloced += size;
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thread_stats.malloced_overhead += needed_size - size;
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if (needed_size > SizeClassMap::kMaxSize)
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thread_stats.malloc_large++;
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else
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thread_stats.malloced_by_size[SizeClassMap::ClassID(needed_size)]++;
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void *res = reinterpret_cast<void *>(user_beg);
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atomic_store(&m->user_requested_size, size, memory_order_release);
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if (alloc_beg != chunk_beg) {
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CHECK_LE(alloc_beg + sizeof(LargeChunkHeader), chunk_beg);
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reinterpret_cast<LargeChunkHeader *>(alloc_beg)->Set(m);
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}
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MEMPROF_MALLOC_HOOK(res, size);
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return res;
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}
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void Deallocate(void *ptr, uptr delete_size, uptr delete_alignment,
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BufferedStackTrace *stack, AllocType alloc_type) {
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uptr p = reinterpret_cast<uptr>(ptr);
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if (p == 0)
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return;
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MEMPROF_FREE_HOOK(ptr);
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uptr chunk_beg = p - kChunkHeaderSize;
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MemprofChunk *m = reinterpret_cast<MemprofChunk *>(chunk_beg);
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u64 user_requested_size =
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atomic_exchange(&m->user_requested_size, 0, memory_order_acquire);
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if (memprof_inited && memprof_init_done &&
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atomic_load_relaxed(&constructed) &&
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!atomic_load_relaxed(&destructing)) {
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u64 c = GetShadowCount(p, user_requested_size);
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long curtime = GetTimestamp();
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MemInfoBlock newMIB(user_requested_size, c, m->timestamp_ms, curtime,
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m->cpu_id, GetCpuId());
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InsertOrMerge(m->alloc_context_id, newMIB, MIBMap);
|
|
}
|
|
|
|
MemprofStats &thread_stats = GetCurrentThreadStats();
|
|
thread_stats.frees++;
|
|
thread_stats.freed += user_requested_size;
|
|
|
|
void *alloc_beg = m->AllocBeg();
|
|
if (alloc_beg != m) {
|
|
// Clear the magic value, as allocator internals may overwrite the
|
|
// contents of deallocated chunk, confusing GetMemprofChunk lookup.
|
|
reinterpret_cast<LargeChunkHeader *>(alloc_beg)->Set(nullptr);
|
|
}
|
|
|
|
MemprofThread *t = GetCurrentThread();
|
|
if (t) {
|
|
AllocatorCache *cache = GetAllocatorCache(&t->malloc_storage());
|
|
allocator.Deallocate(cache, alloc_beg);
|
|
} else {
|
|
SpinMutexLock l(&fallback_mutex);
|
|
AllocatorCache *cache = &fallback_allocator_cache;
|
|
allocator.Deallocate(cache, alloc_beg);
|
|
}
|
|
}
|
|
|
|
void *Reallocate(void *old_ptr, uptr new_size, BufferedStackTrace *stack) {
|
|
CHECK(old_ptr && new_size);
|
|
uptr p = reinterpret_cast<uptr>(old_ptr);
|
|
uptr chunk_beg = p - kChunkHeaderSize;
|
|
MemprofChunk *m = reinterpret_cast<MemprofChunk *>(chunk_beg);
|
|
|
|
MemprofStats &thread_stats = GetCurrentThreadStats();
|
|
thread_stats.reallocs++;
|
|
thread_stats.realloced += new_size;
|
|
|
|
void *new_ptr = Allocate(new_size, 8, stack, FROM_MALLOC);
|
|
if (new_ptr) {
|
|
CHECK_NE(REAL(memcpy), nullptr);
|
|
uptr memcpy_size = Min(new_size, m->UsedSize());
|
|
REAL(memcpy)(new_ptr, old_ptr, memcpy_size);
|
|
Deallocate(old_ptr, 0, 0, stack, FROM_MALLOC);
|
|
}
|
|
return new_ptr;
|
|
}
|
|
|
|
void *Calloc(uptr nmemb, uptr size, BufferedStackTrace *stack) {
|
|
if (UNLIKELY(CheckForCallocOverflow(size, nmemb))) {
|
|
if (AllocatorMayReturnNull())
|
|
return nullptr;
|
|
ReportCallocOverflow(nmemb, size, stack);
|
|
}
|
|
void *ptr = Allocate(nmemb * size, 8, stack, FROM_MALLOC);
|
|
// If the memory comes from the secondary allocator no need to clear it
|
|
// as it comes directly from mmap.
|
|
if (ptr && allocator.FromPrimary(ptr))
|
|
REAL(memset)(ptr, 0, nmemb * size);
|
|
return ptr;
|
|
}
|
|
|
|
void CommitBack(MemprofThreadLocalMallocStorage *ms,
|
|
BufferedStackTrace *stack) {
|
|
AllocatorCache *ac = GetAllocatorCache(ms);
|
|
allocator.SwallowCache(ac);
|
|
}
|
|
|
|
// -------------------------- Chunk lookup ----------------------
|
|
|
|
// Assumes alloc_beg == allocator.GetBlockBegin(alloc_beg).
|
|
MemprofChunk *GetMemprofChunk(void *alloc_beg, u64 &user_requested_size) {
|
|
if (!alloc_beg)
|
|
return nullptr;
|
|
MemprofChunk *p = reinterpret_cast<LargeChunkHeader *>(alloc_beg)->Get();
|
|
if (!p) {
|
|
if (!allocator.FromPrimary(alloc_beg))
|
|
return nullptr;
|
|
p = reinterpret_cast<MemprofChunk *>(alloc_beg);
|
|
}
|
|
// The size is reset to 0 on deallocation (and a min of 1 on
|
|
// allocation).
|
|
user_requested_size =
|
|
atomic_load(&p->user_requested_size, memory_order_acquire);
|
|
if (user_requested_size)
|
|
return p;
|
|
return nullptr;
|
|
}
|
|
|
|
MemprofChunk *GetMemprofChunkByAddr(uptr p, u64 &user_requested_size) {
|
|
void *alloc_beg = allocator.GetBlockBegin(reinterpret_cast<void *>(p));
|
|
return GetMemprofChunk(alloc_beg, user_requested_size);
|
|
}
|
|
|
|
uptr AllocationSize(uptr p) {
|
|
u64 user_requested_size;
|
|
MemprofChunk *m = GetMemprofChunkByAddr(p, user_requested_size);
|
|
if (!m)
|
|
return 0;
|
|
if (m->Beg() != p)
|
|
return 0;
|
|
return user_requested_size;
|
|
}
|
|
|
|
void Purge(BufferedStackTrace *stack) { allocator.ForceReleaseToOS(); }
|
|
|
|
void PrintStats() { allocator.PrintStats(); }
|
|
|
|
void ForceLock() SANITIZER_NO_THREAD_SAFETY_ANALYSIS {
|
|
allocator.ForceLock();
|
|
fallback_mutex.Lock();
|
|
}
|
|
|
|
void ForceUnlock() SANITIZER_NO_THREAD_SAFETY_ANALYSIS {
|
|
fallback_mutex.Unlock();
|
|
allocator.ForceUnlock();
|
|
}
|
|
};
|
|
|
|
static Allocator instance(LINKER_INITIALIZED);
|
|
|
|
static MemprofAllocator &get_allocator() { return instance.allocator; }
|
|
|
|
void InitializeAllocator() { instance.InitLinkerInitialized(); }
|
|
|
|
void MemprofThreadLocalMallocStorage::CommitBack() {
|
|
GET_STACK_TRACE_MALLOC;
|
|
instance.CommitBack(this, &stack);
|
|
}
|
|
|
|
void PrintInternalAllocatorStats() { instance.PrintStats(); }
|
|
|
|
void memprof_free(void *ptr, BufferedStackTrace *stack, AllocType alloc_type) {
|
|
instance.Deallocate(ptr, 0, 0, stack, alloc_type);
|
|
}
|
|
|
|
void memprof_delete(void *ptr, uptr size, uptr alignment,
|
|
BufferedStackTrace *stack, AllocType alloc_type) {
|
|
instance.Deallocate(ptr, size, alignment, stack, alloc_type);
|
|
}
|
|
|
|
void *memprof_malloc(uptr size, BufferedStackTrace *stack) {
|
|
return SetErrnoOnNull(instance.Allocate(size, 8, stack, FROM_MALLOC));
|
|
}
|
|
|
|
void *memprof_calloc(uptr nmemb, uptr size, BufferedStackTrace *stack) {
|
|
return SetErrnoOnNull(instance.Calloc(nmemb, size, stack));
|
|
}
|
|
|
|
void *memprof_reallocarray(void *p, uptr nmemb, uptr size,
|
|
BufferedStackTrace *stack) {
|
|
if (UNLIKELY(CheckForCallocOverflow(size, nmemb))) {
|
|
errno = errno_ENOMEM;
|
|
if (AllocatorMayReturnNull())
|
|
return nullptr;
|
|
ReportReallocArrayOverflow(nmemb, size, stack);
|
|
}
|
|
return memprof_realloc(p, nmemb * size, stack);
|
|
}
|
|
|
|
void *memprof_realloc(void *p, uptr size, BufferedStackTrace *stack) {
|
|
if (!p)
|
|
return SetErrnoOnNull(instance.Allocate(size, 8, stack, FROM_MALLOC));
|
|
if (size == 0) {
|
|
if (flags()->allocator_frees_and_returns_null_on_realloc_zero) {
|
|
instance.Deallocate(p, 0, 0, stack, FROM_MALLOC);
|
|
return nullptr;
|
|
}
|
|
// Allocate a size of 1 if we shouldn't free() on Realloc to 0
|
|
size = 1;
|
|
}
|
|
return SetErrnoOnNull(instance.Reallocate(p, size, stack));
|
|
}
|
|
|
|
void *memprof_valloc(uptr size, BufferedStackTrace *stack) {
|
|
return SetErrnoOnNull(
|
|
instance.Allocate(size, GetPageSizeCached(), stack, FROM_MALLOC));
|
|
}
|
|
|
|
void *memprof_pvalloc(uptr size, BufferedStackTrace *stack) {
|
|
uptr PageSize = GetPageSizeCached();
|
|
if (UNLIKELY(CheckForPvallocOverflow(size, PageSize))) {
|
|
errno = errno_ENOMEM;
|
|
if (AllocatorMayReturnNull())
|
|
return nullptr;
|
|
ReportPvallocOverflow(size, stack);
|
|
}
|
|
// pvalloc(0) should allocate one page.
|
|
size = size ? RoundUpTo(size, PageSize) : PageSize;
|
|
return SetErrnoOnNull(instance.Allocate(size, PageSize, stack, FROM_MALLOC));
|
|
}
|
|
|
|
void *memprof_memalign(uptr alignment, uptr size, BufferedStackTrace *stack,
|
|
AllocType alloc_type) {
|
|
if (UNLIKELY(!IsPowerOfTwo(alignment))) {
|
|
errno = errno_EINVAL;
|
|
if (AllocatorMayReturnNull())
|
|
return nullptr;
|
|
ReportInvalidAllocationAlignment(alignment, stack);
|
|
}
|
|
return SetErrnoOnNull(instance.Allocate(size, alignment, stack, alloc_type));
|
|
}
|
|
|
|
void *memprof_aligned_alloc(uptr alignment, uptr size,
|
|
BufferedStackTrace *stack) {
|
|
if (UNLIKELY(!CheckAlignedAllocAlignmentAndSize(alignment, size))) {
|
|
errno = errno_EINVAL;
|
|
if (AllocatorMayReturnNull())
|
|
return nullptr;
|
|
ReportInvalidAlignedAllocAlignment(size, alignment, stack);
|
|
}
|
|
return SetErrnoOnNull(instance.Allocate(size, alignment, stack, FROM_MALLOC));
|
|
}
|
|
|
|
int memprof_posix_memalign(void **memptr, uptr alignment, uptr size,
|
|
BufferedStackTrace *stack) {
|
|
if (UNLIKELY(!CheckPosixMemalignAlignment(alignment))) {
|
|
if (AllocatorMayReturnNull())
|
|
return errno_EINVAL;
|
|
ReportInvalidPosixMemalignAlignment(alignment, stack);
|
|
}
|
|
void *ptr = instance.Allocate(size, alignment, stack, FROM_MALLOC);
|
|
if (UNLIKELY(!ptr))
|
|
// OOM error is already taken care of by Allocate.
|
|
return errno_ENOMEM;
|
|
CHECK(IsAligned((uptr)ptr, alignment));
|
|
*memptr = ptr;
|
|
return 0;
|
|
}
|
|
|
|
uptr memprof_malloc_usable_size(const void *ptr, uptr pc, uptr bp) {
|
|
if (!ptr)
|
|
return 0;
|
|
uptr usable_size = instance.AllocationSize(reinterpret_cast<uptr>(ptr));
|
|
return usable_size;
|
|
}
|
|
|
|
} // namespace __memprof
|
|
|
|
// ---------------------- Interface ---------------- {{{1
|
|
using namespace __memprof;
|
|
|
|
#if !SANITIZER_SUPPORTS_WEAK_HOOKS
|
|
// Provide default (no-op) implementation of malloc hooks.
|
|
SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_malloc_hook, void *ptr,
|
|
uptr size) {
|
|
(void)ptr;
|
|
(void)size;
|
|
}
|
|
|
|
SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_free_hook, void *ptr) {
|
|
(void)ptr;
|
|
}
|
|
#endif
|
|
|
|
uptr __sanitizer_get_estimated_allocated_size(uptr size) { return size; }
|
|
|
|
int __sanitizer_get_ownership(const void *p) {
|
|
return memprof_malloc_usable_size(p, 0, 0) != 0;
|
|
}
|
|
|
|
uptr __sanitizer_get_allocated_size(const void *p) {
|
|
return memprof_malloc_usable_size(p, 0, 0);
|
|
}
|
|
|
|
int __memprof_profile_dump() {
|
|
instance.FinishAndWrite();
|
|
// In the future we may want to return non-zero if there are any errors
|
|
// detected during the dumping process.
|
|
return 0;
|
|
}
|