| //===-- memprof_mibmap.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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is a part of MemProfiler, a memory profiler. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "memprof_mibmap.h" |
| #include "profile/MemProfData.inc" |
| #include "sanitizer_common/sanitizer_allocator_internal.h" |
| #include "sanitizer_common/sanitizer_mutex.h" |
| |
| namespace __memprof { |
| using ::llvm::memprof::MemInfoBlock; |
| |
| void InsertOrMerge(const uptr Id, const MemInfoBlock &Block, MIBMapTy &Map) { |
| MIBMapTy::Handle h(&Map, static_cast<uptr>(Id), /*remove=*/false, |
| /*create=*/true); |
| if (h.created()) { |
| LockedMemInfoBlock *lmib = |
| (LockedMemInfoBlock *)InternalAlloc(sizeof(LockedMemInfoBlock)); |
| lmib->mutex.Init(); |
| lmib->mib = Block; |
| *h = lmib; |
| } else { |
| LockedMemInfoBlock *lmib = *h; |
| SpinMutexLock lock(&lmib->mutex); |
| uintptr_t ShorterHistogram; |
| if (Block.AccessHistogramSize > lmib->mib.AccessHistogramSize) |
| ShorterHistogram = lmib->mib.AccessHistogram; |
| else |
| ShorterHistogram = Block.AccessHistogram; |
| |
| lmib->mib.Merge(Block); |
| // The larger histogram is kept and the shorter histogram is discarded after |
| // adding the counters to the larger historam. Free only the shorter |
| // Histogram |
| if (Block.AccessHistogramSize > 0 || lmib->mib.AccessHistogramSize > 0) |
| InternalFree((void *)ShorterHistogram); |
| } |
| } |
| |
| } // namespace __memprof |