Index: components/browser_watcher/watcher_metrics_provider_win.cc |
diff --git a/components/browser_watcher/watcher_metrics_provider_win.cc b/components/browser_watcher/watcher_metrics_provider_win.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..72b14759fb37b08e2db8f3d0f50144d46ac73a33 |
--- /dev/null |
+++ b/components/browser_watcher/watcher_metrics_provider_win.cc |
@@ -0,0 +1,88 @@ |
+// Copyright (c) 2014 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 "components/browser_watcher/watcher_metrics_provider_win.h" |
+ |
+#include "base/metrics/sparse_histogram.h" |
+#include "base/process/process_handle.h" |
+#include "base/strings/string_number_conversions.h" |
+#include "base/win/registry.h" |
+ |
+namespace browser_watcher { |
+ |
+namespace { |
+ |
+// This function does soft matching on the PID recorded in the key only. |
+// Due to PID reuse, the possibility exists that the process that's now live |
+// is not the same process the data was recorded for. This doesn't matter for |
+// this purpose, as eventually the data will be scavenged and reported. |
+bool IsLiveProcess(const base::string16& key_name) { |
+ int pid = 0; |
+ base::StringToInt(key_name, &pid); |
+ |
+ if (pid == 0) |
+ return false; |
+ |
+ // This is a very inexpensive check for the common case of our own PID. |
+ if (static_cast<base::ProcessId>(pid) == base::GetCurrentProcId()) |
+ return true; |
+ |
+ // The process is not our own - see whether a process with this PID exists. |
+ base::ProcessHandle process = base::kNullProcessHandle; |
+ if (base::OpenProcessHandle(static_cast<base::ProcessId>(pid), &process)) { |
+ base::CloseProcessHandle(process); |
+ |
+ return true; |
+ } |
+ |
+ return false; |
+} |
+ |
+} // namespace |
+ |
+const char WatcherMetricsProviderWin::kBrowserExitCodeHistogramName[] = |
+ "Stability.BrowserExitCodes"; |
+ |
+ |
+WatcherMetricsProviderWin::WatcherMetricsProviderWin( |
+ const base::string16& registry_path) : registry_path_(registry_path) { |
+} |
+ |
+void WatcherMetricsProviderWin::ProvideStabilityMetrics( |
+ metrics::SystemProfileProto* system_profile_proto) { |
+ base::win::RegKey regkey(HKEY_CURRENT_USER, |
+ registry_path_.c_str(), |
+ KEY_QUERY_VALUE | KEY_SET_VALUE); |
+ |
+ std::vector<base::string16> to_delete; |
+ size_t num = regkey.GetValueCount(); |
+ |
+ // Record the exit codes in a sparse histogram, as the range of values |
+ // used to report failures is large. |
+ base::HistogramBase* exit_code_histogram = |
+ // TODO(siggi): is this an acceptable name? |
+ base::SparseHistogram::FactoryGet(kBrowserExitCodeHistogramName, |
+ base::HistogramBase::kUmaStabilityHistogramFlag); |
+ |
+ for (size_t i = 0; i < num; ++i) { |
+ base::string16 name; |
+ if (regkey.GetValueNameAt(i, &name) == ERROR_SUCCESS) { |
+ DWORD exit_code = 0; |
+ if (regkey.ReadValueDW(name.c_str(), &exit_code) == ERROR_SUCCESS) { |
+ // Do not report exit codes for processes that are still live, notably |
+ // not for our own process. |
+ if (exit_code != STILL_ACTIVE || !IsLiveProcess(name)) { |
+ to_delete.push_back(name); |
+ exit_code_histogram->Add(exit_code); |
+ } |
+ } |
+ } |
+ } |
+ |
+ // Delete the values reported above. |
+ for (size_t i = 0; i < to_delete.size(); ++i) |
+ regkey.DeleteValue(to_delete[i].c_str()); |
+} |
+ |
+} // namespace browser_watcher |