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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 <stddef.h> | |
| 8 | |
| 9 #include "base/process/process_metrics.h" | |
| 10 #include "base/trace_event/process_memory_dump.h" | |
| 11 #include "base/trace_event/process_memory_totals.h" | |
| 12 #include "build/build_config.h" | |
| 13 | |
| 14 #if defined(OS_LINUX) || defined(OS_ANDROID) | |
| 15 #include <fcntl.h> | |
| 16 | |
| 17 #include "base/files/file_util.h" | |
| 18 | |
| 19 namespace { | |
| 20 bool kernel_supports_rss_peak_reset = true; | |
| 21 const char kClearPeakRssCommand[] = "5"; | |
| 22 } | |
| 23 #endif | |
| 24 | |
| 25 namespace base { | |
| 26 namespace trace_event { | |
| 27 | |
| 28 // static | |
| 29 uint64_t ProcessMemoryTotalsDumpProvider::rss_bytes_for_testing = 0; | |
| 30 | |
| 31 // static | |
| 32 ProcessMemoryTotalsDumpProvider* | |
| 33 ProcessMemoryTotalsDumpProvider::GetInstance() { | |
| 34 return Singleton< | |
| 35 ProcessMemoryTotalsDumpProvider, | |
| 36 LeakySingletonTraits<ProcessMemoryTotalsDumpProvider>>::get(); | |
| 37 } | |
| 38 | |
| 39 ProcessMemoryTotalsDumpProvider::ProcessMemoryTotalsDumpProvider() | |
| 40 : process_metrics_(ProcessMetrics::CreateCurrentProcessMetrics()) {} | |
| 41 | |
| 42 ProcessMemoryTotalsDumpProvider::~ProcessMemoryTotalsDumpProvider() { | |
| 43 } | |
| 44 | |
| 45 // Called at trace dump point time. Creates a snapshot the memory counters for | |
| 46 // the current process. | |
| 47 bool ProcessMemoryTotalsDumpProvider::OnMemoryDump(const MemoryDumpArgs& args, | |
| 48 ProcessMemoryDump* pmd) { | |
| 49 const uint64_t rss_bytes = rss_bytes_for_testing | |
| 50 ? rss_bytes_for_testing | |
| 51 : process_metrics_->GetWorkingSetSize(); | |
| 52 | |
| 53 uint64_t peak_rss_bytes = 0; | |
| 54 | |
| 55 #if !defined(OS_IOS) | |
| 56 peak_rss_bytes = process_metrics_->GetPeakWorkingSetSize(); | |
| 57 #if defined(OS_LINUX) || defined(OS_ANDROID) | |
| 58 if (kernel_supports_rss_peak_reset) { | |
| 59 // TODO(ssid): Fix crbug.com/461788 to write to the file from sandboxed | |
| 60 // processes. | |
| 61 int clear_refs_fd = open("/proc/self/clear_refs", O_WRONLY); | |
| 62 if (clear_refs_fd > 0 && | |
| 63 WriteFileDescriptor(clear_refs_fd, kClearPeakRssCommand, | |
| 64 sizeof(kClearPeakRssCommand))) { | |
| 65 pmd->process_totals()->set_is_peak_rss_resetable(true); | |
| 66 } else { | |
| 67 kernel_supports_rss_peak_reset = false; | |
| 68 } | |
| 69 close(clear_refs_fd); | |
| 70 } | |
| 71 #elif defined(OS_MACOSX) | |
| 72 size_t private_bytes; | |
| 73 bool res = process_metrics_->GetMemoryBytes(&private_bytes, | |
| 74 nullptr /* shared_bytes */); | |
| 75 if (res) { | |
| 76 pmd->process_totals()->SetExtraFieldInBytes("private_bytes", private_bytes); | |
| 77 } | |
| 78 #endif // defined(OS_LINUX) || defined(OS_ANDROID) | |
| 79 #endif // !defined(OS_IOS) | |
| 80 | |
| 81 if (rss_bytes > 0) { | |
| 82 pmd->process_totals()->set_resident_set_bytes(rss_bytes); | |
| 83 pmd->process_totals()->set_peak_resident_set_bytes(peak_rss_bytes); | |
| 84 pmd->set_has_process_totals(); | |
| 85 return true; | |
| 86 } | |
| 87 | |
| 88 return false; | |
| 89 } | |
| 90 | |
| 91 } // namespace trace_event | |
| 92 } // 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