Move tracing component to src/components

BUG=167317
COLLABORATOR=joi@chromium.org

Review URL: https://chromiumcodereview.appspot.com/11624021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@174716 0039d316-1c4b-4281-b951-d872f2087c98

9 files changed, 341 insertions, 0 deletions

diff --git a/components/OWNERS b/components/OWNERS
index 4975363..4cc56a9 100644
--- a/components/OWNERS
+++ b/components/OWNERS
@@ -1 +1,4 @@
 joi@chromium.org
+
+per-file components_tracing*=jbauman@chromium.org
+per-file components_tracing*=nduca@chromium.org
diff --git a/components/components_tracing.gyp b/components/components_tracing.gyp
new file mode 100644
index 0000000..f11c823
--- /dev/null
+++ b/components/components_tracing.gyp
@@ -0,0 +1,27 @@
+# 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.
+
+{
+  'targets' : [
+    {
+      'target_name': 'tracing',
+      'type': 'static_library',
+      'defines!': ['CONTENT_IMPLEMENTATION'],
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../ipc/ipc.gyp:ipc',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+      'sources': [
+        'tracing/child_trace_message_filter.cc',
+        'tracing/child_trace_message_filter.h',
+        'tracing/tracing_messages.cc',
+        'tracing/tracing_messages.h',
+      ],
+    },
+  ],
+}
diff --git a/components/components_tracing_untrusted.gyp b/components/components_tracing_untrusted.gyp
new file mode 100644
index 0000000..ff3e720
--- /dev/null
+++ b/components/components_tracing_untrusted.gyp
@@ -0,0 +1,41 @@
+# 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.
+
+{
+  'includes': [
+    '../build/common_untrusted.gypi',
+  ],
+  'conditions': [
+    ['disable_nacl==0 and disable_nacl_untrusted==0', {
+      'targets': [
+        {
+          'target_name': 'tracing_untrusted',
+          'type': 'none',
+          'defines!': ['CONTENT_IMPLEMENTATION'],
+          'dependencies': [
+            '../base/base_untrusted.gyp:base_untrusted',
+            '../native_client/tools.gyp:prep_toolchain',
+            '../ipc/ipc.gyp:ipc',
+          ],
+          'include_dirs': [
+            '..',
+          ],
+          'variables': {
+            'nacl_untrusted_build': 1,
+            'nlib_target': 'libtracing_untrusted.a',
+            'build_glibc': 0,
+            'build_newlib': 1,
+          },
+          'sources': [
+            'tracing/child_trace_message_filter.cc',
+            'tracing/child_trace_message_filter.h',
+            'tracing/tracing_messages.cc',
+            'tracing/tracing_messages.h',
+          ],
+        },
+      ],
+    }],
+  ],
+}
diff --git a/components/tracing/DEPS b/components/tracing/DEPS
new file mode 100644
index 0000000..bd05a3e
--- /dev/null
+++ b/components/tracing/DEPS
@@ -0,0 +1,8 @@
+include_rules = [
+  "+base",
+  "+ipc",
+
+  # This component will be compiled into NaCl, so it shouldn't depend on
+  # anything in content.
+  "-content",
+]
diff --git a/components/tracing/OWNERS b/components/tracing/OWNERS
new file mode 100644
index 0000000..ba7dc1b
--- /dev/null
+++ b/components/tracing/OWNERS
@@ -0,0 +1,2 @@
+jbauman@chromium.org
+nduca@chromium.org
diff --git a/components/tracing/child_trace_message_filter.cc b/components/tracing/child_trace_message_filter.cc
new file mode 100644
index 0000000..161c778
--- /dev/null
+++ b/components/tracing/child_trace_message_filter.cc
@@ -0,0 +1,117 @@
+// 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 "components/tracing/child_trace_message_filter.h"
+
+#include "base/debug/trace_event.h"
+#include "base/message_loop_proxy.h"
+#include "components/tracing/tracing_messages.h"
+
+using base::debug::TraceLog;
+
+namespace components {
+
+ChildTraceMessageFilter::ChildTraceMessageFilter(
+    base::MessageLoopProxy* ipc_message_loop)
+    : channel_(NULL),
+      ipc_message_loop_(ipc_message_loop) {}
+
+void ChildTraceMessageFilter::OnFilterAdded(IPC::Channel* channel) {
+  channel_ = channel;
+  TraceLog::GetInstance()->SetNotificationCallback(
+      base::Bind(&ChildTraceMessageFilter::OnTraceNotification, this));
+  channel_->Send(new TracingHostMsg_ChildSupportsTracing());
+}
+
+void ChildTraceMessageFilter::OnFilterRemoved() {
+  TraceLog::GetInstance()->SetNotificationCallback(
+      TraceLog::NotificationCallback());
+}
+
+bool ChildTraceMessageFilter::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(ChildTraceMessageFilter, message)
+    IPC_MESSAGE_HANDLER(TracingMsg_BeginTracing, OnBeginTracing)
+    IPC_MESSAGE_HANDLER(TracingMsg_EndTracing, OnEndTracing)
+    IPC_MESSAGE_HANDLER(TracingMsg_GetTraceBufferPercentFull,
+                        OnGetTraceBufferPercentFull)
+    IPC_MESSAGE_HANDLER(TracingMsg_SetWatchEvent, OnSetWatchEvent)
+    IPC_MESSAGE_HANDLER(TracingMsg_CancelWatchEvent, OnCancelWatchEvent)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+ChildTraceMessageFilter::~ChildTraceMessageFilter() {}
+
+void ChildTraceMessageFilter::OnBeginTracing(
+    const std::vector<std::string>& included_categories,
+    const std::vector<std::string>& excluded_categories,
+    base::TimeTicks browser_time) {
+#if defined(__native_client__)
+  // NaCl and system times are offset by a bit, so subtract some time from
+  // the captured timestamps. The value might be off by a bit due to messaging
+  // latency.
+  base::TimeDelta time_offset = base::TimeTicks::NowFromSystemTraceTime() -
+      browser_time;
+  TraceLog::GetInstance()->SetTimeOffset(time_offset);
+#endif
+  TraceLog::GetInstance()->SetEnabled(included_categories,
+                                      excluded_categories);
+}
+
+void ChildTraceMessageFilter::OnEndTracing() {
+  TraceLog::GetInstance()->SetDisabled();
+
+  // Flush will generate one or more callbacks to OnTraceDataCollected. It's
+  // important that the last OnTraceDataCollected gets called before
+  // EndTracingAck below. We are already on the IO thread, so the
+  // OnTraceDataCollected calls will not be deferred.
+  TraceLog::GetInstance()->Flush(
+      base::Bind(&ChildTraceMessageFilter::OnTraceDataCollected, this));
+
+  std::vector<std::string> categories;
+  TraceLog::GetInstance()->GetKnownCategories(&categories);
+  channel_->Send(new TracingHostMsg_EndTracingAck(categories));
+}
+
+void ChildTraceMessageFilter::OnGetTraceBufferPercentFull() {
+  float bpf = TraceLog::GetInstance()->GetBufferPercentFull();
+
+  channel_->Send(new TracingHostMsg_TraceBufferPercentFullReply(bpf));
+}
+
+void ChildTraceMessageFilter::OnSetWatchEvent(const std::string& category_name,
+                                              const std::string& event_name) {
+  TraceLog::GetInstance()->SetWatchEvent(category_name.c_str(),
+                                         event_name.c_str());
+}
+
+void ChildTraceMessageFilter::OnCancelWatchEvent() {
+  TraceLog::GetInstance()->CancelWatchEvent();
+}
+
+void ChildTraceMessageFilter::OnTraceDataCollected(
+    const scoped_refptr<base::RefCountedString>& events_str_ptr) {
+  if (!ipc_message_loop_->BelongsToCurrentThread()) {
+    ipc_message_loop_->PostTask(FROM_HERE,
+        base::Bind(&ChildTraceMessageFilter::OnTraceDataCollected, this,
+                   events_str_ptr));
+    return;
+  }
+  channel_->Send(new TracingHostMsg_TraceDataCollected(
+      events_str_ptr->data()));
+}
+
+void ChildTraceMessageFilter::OnTraceNotification(int notification) {
+  if (!ipc_message_loop_->BelongsToCurrentThread()) {
+    ipc_message_loop_->PostTask(FROM_HERE,
+        base::Bind(&ChildTraceMessageFilter::OnTraceNotification, this,
+                   notification));
+    return;
+  }
+  channel_->Send(new TracingHostMsg_TraceNotification(notification));
+}
+
+}  // namespace components
diff --git a/components/tracing/child_trace_message_filter.h b/components/tracing/child_trace_message_filter.h
new file mode 100644
index 0000000..e4802ba
--- /dev/null
+++ b/components/tracing/child_trace_message_filter.h
@@ -0,0 +1,53 @@
+// 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.
+
+#ifndef COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_
+#define COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_
+
+#include "ipc/ipc_channel_proxy.h"
+
+namespace base {
+class MessageLoopProxy;
+}
+
+namespace components {
+
+// This class sends and receives trace messages on child processes.
+class ChildTraceMessageFilter : public IPC::ChannelProxy::MessageFilter {
+ public:
+  explicit ChildTraceMessageFilter(base::MessageLoopProxy* ipc_message_loop);
+
+  // IPC::ChannelProxy::MessageFilter implementation.
+  virtual void OnFilterAdded(IPC::Channel* channel) OVERRIDE;
+  virtual void OnFilterRemoved() OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
+ protected:
+  virtual ~ChildTraceMessageFilter();
+
+ private:
+  // Message handlers.
+  void OnBeginTracing(const std::vector<std::string>& included_categories,
+                      const std::vector<std::string>& excluded_categories,
+                      base::TimeTicks browser_time);
+  void OnEndTracing();
+  void OnGetTraceBufferPercentFull();
+  void OnSetWatchEvent(const std::string& category_name,
+                       const std::string& event_name);
+  void OnCancelWatchEvent();
+
+  // Callback from trace subsystem.
+  void OnTraceDataCollected(
+      const scoped_refptr<base::RefCountedString>& events_str_ptr);
+  void OnTraceNotification(int notification);
+
+  IPC::Channel* channel_;
+  base::MessageLoopProxy* ipc_message_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChildTraceMessageFilter);
+};
+
+} // namespace components
+
+#endif  // COMPONENTS_TRACING_CHILD_TRACE_MESSAGE_FILTER_H_
diff --git a/components/tracing/tracing_messages.cc b/components/tracing/tracing_messages.cc
new file mode 100644
index 0000000..3d7637a
--- /dev/null
+++ b/components/tracing/tracing_messages.cc
@@ -0,0 +1,34 @@
+// Copyright (c) 2010 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.
+
+// Get basic type definitions.
+#define IPC_MESSAGE_IMPL
+#include "components/tracing/tracing_messages.h"
+
+// Generate constructors.
+#include "ipc/struct_constructor_macros.h"
+#include "components/tracing/tracing_messages.h"
+
+// Generate destructors.
+#include "ipc/struct_destructor_macros.h"
+#include "components/tracing/tracing_messages.h"
+
+// Generate param traits write methods.
+#include "ipc/param_traits_write_macros.h"
+namespace IPC {
+#include "components/tracing/tracing_messages.h"
+}  // namespace IPC
+
+// Generate param traits read methods.
+#include "ipc/param_traits_read_macros.h"
+namespace IPC {
+#include "components/tracing/tracing_messages.h"
+}  // namespace IPC
+
+// Generate param traits log methods.
+#include "ipc/param_traits_log_macros.h"
+namespace IPC {
+#include "components/tracing/tracing_messages.h"
+}  // namespace IPC
+
diff --git a/components/tracing/tracing_messages.h b/components/tracing/tracing_messages.h
new file mode 100644
index 0000000..792c476
--- /dev/null
+++ b/components/tracing/tracing_messages.h
@@ -0,0 +1,56 @@
+// 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.
+
+// Multiply-included message header, no traditional include guard.
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/sync_socket.h"
+#include "ipc/ipc_channel_handle.h"
+#include "ipc/ipc_message_macros.h"
+#include "ipc/ipc_message_utils.h"
+#include "ipc/ipc_platform_file.h"
+
+#define IPC_MESSAGE_START TracingMsgStart
+
+// Sent to all child processes to enable trace event recording.
+IPC_MESSAGE_CONTROL3(TracingMsg_BeginTracing,
+                     std::vector<std::string> /* included_categories */,
+                     std::vector<std::string> /* excluded_categories */,
+                     base::TimeTicks /* browser_time */)
+
+// Sent to all child processes to disable trace event recording.
+IPC_MESSAGE_CONTROL0(TracingMsg_EndTracing)
+
+// Sent to all child processes to get trace buffer fullness.
+IPC_MESSAGE_CONTROL0(TracingMsg_GetTraceBufferPercentFull)
+
+// Sent to all child processes to set watch event.
+IPC_MESSAGE_CONTROL2(TracingMsg_SetWatchEvent,
+                     std::string /* category_name */,
+                     std::string /* event_name */)
+
+// Sent to all child processes to clear watch event.
+IPC_MESSAGE_CONTROL0(TracingMsg_CancelWatchEvent)
+
+// Notify the browser that this child process supports tracing.
+IPC_MESSAGE_CONTROL0(TracingHostMsg_ChildSupportsTracing)
+
+// Reply from child processes acking ChildProcessMsg_TraceChangeStatus(false).
+IPC_MESSAGE_CONTROL1(TracingHostMsg_EndTracingAck,
+                     std::vector<std::string> /* known_categories */)
+
+// Sent if the trace buffer becomes full.
+IPC_MESSAGE_CONTROL1(TracingHostMsg_TraceNotification,
+                     int /* base::debug::TraceLog::Notification */)
+
+// Child processes send trace data back in JSON chunks.
+IPC_MESSAGE_CONTROL1(TracingHostMsg_TraceDataCollected,
+                     std::string /*json trace data*/)
+
+// Reply to TracingMsg_GetTraceBufferPercentFull.
+IPC_MESSAGE_CONTROL1(TracingHostMsg_TraceBufferPercentFullReply,
+                     float /*trace buffer percent full*/)
+