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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/trace_event/process_memory_totals_dump_provider.h" | |
| 6 | |
| 7 #include "base/process/process_metrics.h" | |
| 8 #include "base/trace_event/process_memory_dump.h" | |
| 9 #include "base/trace_event/process_memory_totals.h" | |
| 10 | |
| 11 #if defined(OS_LINUX) || defined(OS_ANDROID) | |
| 12 #include <fcntl.h> | |
| 13 | |
| 14 #include "base/files/file_util.h" | |
| 15 | |
| 16 namespace { | |
| 17 bool kernel_supports_rss_peak_reset = true; | |
| 18 const char kClearPeakRssCommand[] = "5"; | |
| 19 } | |
| 20 #endif | |
| 21 | |
| 22 namespace base { | |
| 23 namespace trace_event { | |
| 24 | |
| 25 // static | |
| 26 uint64 ProcessMemoryTotalsDumpProvider::rss_bytes_for_testing = 0; | |
| 27 | |
| 28 // static | |
| 29 ProcessMemoryTotalsDumpProvider* | |
| 30 ProcessMemoryTotalsDumpProvider::GetInstance() { | |
| 31 return Singleton< | |
| 32 ProcessMemoryTotalsDumpProvider, | |
| 33 LeakySingletonTraits<ProcessMemoryTotalsDumpProvider>>::get(); | |
| 34 } | |
| 35 | |
| 36 ProcessMemoryTotalsDumpProvider::ProcessMemoryTotalsDumpProvider() | |
| 37 : process_metrics_(ProcessMetrics::CreateCurrentProcessMetrics()) {} | |
| 38 | |
| 39 ProcessMemoryTotalsDumpProvider::~ProcessMemoryTotalsDumpProvider() { | |
| 40 } | |
| 41 | |
| 42 // Called at trace dump point time. Creates a snapshot the memory counters for | |
| 43 // the current process. | |
| 44 bool ProcessMemoryTotalsDumpProvider::OnMemoryDump(const MemoryDumpArgs& args, | |
| 45 ProcessMemoryDump* pmd) { | |
| 46 const uint64 rss_bytes = rss_bytes_for_testing | |
| 47 ? rss_bytes_for_testing | |
| 48 : process_metrics_->GetWorkingSetSize(); | |
| 49 | |
| 50 uint64 peak_rss_bytes = 0; | |
| 51 | |
| 52 #if !defined(OS_IOS) | |
| 53 peak_rss_bytes = process_metrics_->GetPeakWorkingSetSize(); | |
| 54 #if defined(OS_LINUX) || defined(OS_ANDROID) | |
| 55 if (kernel_supports_rss_peak_reset) { | |
| 56 // TODO(ssid): Fix crbug.com/461788 to write to the file from sandboxed | |
| 57 // processes. | |
| 58 int clear_refs_fd = open("/proc/self/clear_refs", O_WRONLY); | |
| 59 if (clear_refs_fd > 0 && | |
| 60 WriteFileDescriptor(clear_refs_fd, kClearPeakRssCommand, | |
| 61 sizeof(kClearPeakRssCommand))) { | |
| 62 pmd->process_totals()->set_is_peak_rss_resetable(true); | |
| 63 } else { | |
| 64 kernel_supports_rss_peak_reset = false; | |
| 65 } | |
| 66 close(clear_refs_fd); | |
| 67 } | |
| 68 #elif defined(OS_MACOSX) | |
| 69 size_t private_bytes; | |
| 70 bool res = process_metrics_->GetMemoryBytes(&private_bytes, | |
| 71 nullptr /* shared_bytes */); | |
| 72 if (res) { | |
| 73 pmd->process_totals()->SetExtraFieldInBytes("private_bytes", private_bytes); | |
| 74 } | |
| 75 #endif // defined(OS_LINUX) || defined(OS_ANDROID) | |
| 76 #endif // !defined(OS_IOS) | |
| 77 | |
| 78 if (rss_bytes > 0) { | |
| 79 pmd->process_totals()->set_resident_set_bytes(rss_bytes); | |
| 80 pmd->process_totals()->set_peak_resident_set_bytes(peak_rss_bytes); | |
| 81 pmd->set_has_process_totals(); | |
| 82 return true; | |
| 83 } | |
| 84 | |
| 85 return false; | |
| 86 } | |
| 87 | |
| 88 } // namespace trace_event | |
| 89 } // namespace base | |
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Chromium Code Reviews
Issue 1417003003:
[tracing] Dump child processes' memory metrics in browser (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@web_cache2_base