diff options
Diffstat (limited to 'chromium/base/trace_event/winheap_dump_provider_win.cc')
-rw-r--r-- | chromium/base/trace_event/winheap_dump_provider_win.cc | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/chromium/base/trace_event/winheap_dump_provider_win.cc b/chromium/base/trace_event/winheap_dump_provider_win.cc new file mode 100644 index 00000000000..e1e9bcf4a7c --- /dev/null +++ b/chromium/base/trace_event/winheap_dump_provider_win.cc @@ -0,0 +1,99 @@ +// Copyright 2015 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "base/trace_event/winheap_dump_provider_win.h" + +#include <windows.h> + +#include "base/trace_event/process_memory_dump.h" + +namespace base { +namespace trace_event { + +namespace { + +// Report a heap dump to a process memory dump. The |heap_info| structure +// contains the information about this heap, and |dump_absolute_name| will be +// used to represent it in the report. +bool ReportHeapDump(ProcessMemoryDump* pmd, + const WinHeapInfo& heap_info, + const std::string& dump_absolute_name) { + MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(dump_absolute_name); + if (!dump) + return false; + dump->AddScalar(MemoryAllocatorDump::kNameOuterSize, + MemoryAllocatorDump::kUnitsBytes, heap_info.committed_size); + dump->AddScalar(MemoryAllocatorDump::kNameInnerSize, + MemoryAllocatorDump::kUnitsBytes, heap_info.allocated_size); + dump->AddScalar(MemoryAllocatorDump::kNameObjectsCount, + MemoryAllocatorDump::kUnitsObjects, heap_info.block_count); + return true; +} + +} // namespace + +WinHeapDumpProvider* WinHeapDumpProvider::GetInstance() { + return Singleton<WinHeapDumpProvider, + LeakySingletonTraits<WinHeapDumpProvider>>::get(); +} + +bool WinHeapDumpProvider::OnMemoryDump(ProcessMemoryDump* pmd) { + // Retrieves the number of heaps in the current process. + DWORD number_of_heaps = ::GetProcessHeaps(0, NULL); + WinHeapInfo all_heap_info = {0}; + + // Try to retrieve a handle to all the heaps owned by this process. Returns + // false if the number of heaps has changed. + // + // This is inherently racy as is, but it's not something that we observe a lot + // in Chrome, the heaps tend to be created at startup only. + scoped_ptr<HANDLE[]> all_heaps(new HANDLE[number_of_heaps]); + if (::GetProcessHeaps(number_of_heaps, all_heaps.get()) != number_of_heaps) + return false; + + // Skip the pointer to the heap array to avoid accounting the memory used by + // this dump provider. + std::set<void*> block_to_skip; + block_to_skip.insert(all_heaps.get()); + + // Retrieves some metrics about each heap. + for (size_t i = 0; i < number_of_heaps; ++i) { + WinHeapInfo heap_info = {0}; + heap_info.heap_id = all_heaps[i]; + GetHeapInformation(&heap_info, block_to_skip); + + all_heap_info.allocated_size += heap_info.allocated_size; + all_heap_info.committed_size += heap_info.committed_size; + all_heap_info.block_count += heap_info.block_count; + } + // Report the heap dump. + if (!ReportHeapDump(pmd, all_heap_info, "winheap")) + return false; + + return true; +} + +bool WinHeapDumpProvider::GetHeapInformation( + WinHeapInfo* heap_info, + const std::set<void*>& block_to_skip) { + CHECK(::HeapLock(heap_info->heap_id) == TRUE); + PROCESS_HEAP_ENTRY heap_entry; + heap_entry.lpData = nullptr; + // Walk over all the entries in this heap. + while (::HeapWalk(heap_info->heap_id, &heap_entry) != FALSE) { + if (block_to_skip.count(heap_entry.lpData) == 1) + continue; + if ((heap_entry.wFlags & PROCESS_HEAP_ENTRY_BUSY) != 0) { + heap_info->allocated_size += heap_entry.cbData; + heap_info->block_count++; + } else if ((heap_entry.wFlags & PROCESS_HEAP_REGION) != 0) { + heap_info->committed_size += heap_entry.Region.dwCommittedSize; + } + } + CHECK(::HeapUnlock(heap_info->heap_id) == TRUE); + return true; +} + +} // namespace trace_event +} // namespace base |