Histograms - Support histograms for Plugins, GPU

content/common/child_histogram_message_filter.cc

Index: content/common/child_histogram_message_filter.cc
===================================================================
--- content/common/child_histogram_message_filter.cc	(revision 0)
+++ content/common/child_histogram_message_filter.cc	(working copy)
@@ -0,0 +1,94 @@
+// Copyright (c) 2012 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 "content/common/child_histogram_message_filter.h"
+
+#include <ctype.h>
+
+#include "base/bind.h"
+#include "base/message_loop.h"
+#include "content/common/child_process.h"
+#include "content/common/child_process_messages.h"
+#include "content/common/child_thread.h"
+
+
+ChildHistogramMessageFilter::ChildHistogramMessageFilter() : channel_(NULL) {
+}
+
+ChildHistogramMessageFilter::~ChildHistogramMessageFilter() {
+}
+
+void ChildHistogramMessageFilter::OnFilterAdded(IPC::Channel* channel) {
+  channel_ = channel;
+}
+
+void ChildHistogramMessageFilter::OnFilterRemoved() {
+}
+
+bool ChildHistogramMessageFilter::OnMessageReceived(
+    const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(ChildHistogramMessageFilter, message)
+    IPC_MESSAGE_HANDLER(ChildProcessMsg_GetChildHistogramData,
+                        OnGetChildHistogramData)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void ChildHistogramMessageFilter::SendHistograms(int sequence_number) {
+  ChildProcess::current()->io_message_loop_proxy()->PostTask(
+      FROM_HERE, base::Bind(&ChildHistogramMessageFilter::UploadAllHistrograms,
+                            this, sequence_number));
+}
+
+void ChildHistogramMessageFilter::OnGetChildHistogramData(int sequence_number) {
+  UploadAllHistrograms(sequence_number);
+}
+
+void ChildHistogramMessageFilter::UploadAllHistrograms(int sequence_number) {
+  DCHECK_EQ(0u, pickled_histograms_.size());
+
+  base::StatisticsRecorder::CollectHistogramStats("ChildProcess");
+
+  // Push snapshots into our pickled_histograms_ vector.
+  TransmitAllHistograms(base::Histogram::kIPCSerializationSourceFlag, false);
+
+  // Send the sequence number and list of pickled histograms over synchronous
+  // IPC, so we can clear pickled_histograms_ afterwards.
+  channel_->Send(new ChildProcessHostMsg_ChildHistogramData(
+      sequence_number, pickled_histograms_));
+
+  pickled_histograms_.clear();
+  static int count = 0;
+  count++;
+  DHISTOGRAM_COUNTS("Histogram.ChildProcessHistogramSentCount", count);
+}
+
+void ChildHistogramMessageFilter::TransmitHistogramDelta(
+      const base::Histogram& histogram,
+      const base::Histogram::SampleSet& snapshot) {
+  DCHECK_NE(0, snapshot.TotalCount());
+  snapshot.CheckSize(histogram);
+
+  std::string histogram_info =
+      base::Histogram::SerializeHistogramInfo(histogram, snapshot);
+
+  pickled_histograms_.push_back(histogram_info);
+}
+
+void ChildHistogramMessageFilter::InconsistencyDetected(int problem) {
+  UMA_HISTOGRAM_ENUMERATION("Histogram.InconsistenciesChildProcess",
+                            problem, base::Histogram::NEVER_EXCEEDED_VALUE);
+}
+
+void ChildHistogramMessageFilter::UniqueInconsistencyDetected(int problem) {
+  UMA_HISTOGRAM_ENUMERATION("Histogram.InconsistenciesChildProcessUnique",
+                            problem, base::Histogram::NEVER_EXCEEDED_VALUE);
+}
+
+void ChildHistogramMessageFilter::SnapshotProblemResolved(int amount) {
+  UMA_HISTOGRAM_COUNTS("Histogram.InconsistentSnapshotChildProcess",
+                       std::abs(amount));
+}
Property changes on: content/common/child_histogram_message_filter.cc
___________________________________________________________________
Added: svn:executable
## -0,0 +1 ##
+*
Added: svn:eol-style
## -0,0 +1 ##
+LF