Collect profiler stats from browser child processes.

content/common/child_process_messages.h

 // Copyright (c) 2011 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.
 
 // Common IPC messages used for child processes.
 // Multiply-included message file, hence no include guard.
 
+#include "base/process.h"
 #include "base/shared_memory.h"
 #include "content/common/content_export.h"
 #include "googleurl/src/gurl.h"
 #include "ipc/ipc_message_macros.h"
 
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 
 #define IPC_MESSAGE_START ChildProcessMsgStart
 
@@ skipping 16 matching lines @@
 IPC_MESSAGE_CONTROL2(ChildProcessMsg_BeginTracing,
                      std::vector<std::string> /* included_categories */,
                      std::vector<std::string> /* excluded_categories */)
 
 // Sent to all child processes to disable trace event recording.
 IPC_MESSAGE_CONTROL0(ChildProcessMsg_EndTracing)
 
 // Sent to all child processes to get trace buffer fullness.
 IPC_MESSAGE_CONTROL0(ChildProcessMsg_GetTraceBufferPercentFull)
 
+// Tell the child process to enable or disable the profiler status.
+IPC_MESSAGE_CONTROL1(ChildProcessMsg_SetProfilerStatus,
+                     bool /* profiler status */)
+
+// Sent to all the child processes to send back profiler data (ThreadData in
+// tracked_objects).
+IPC_MESSAGE_CONTROL2(ChildProcessMsg_GetChildProfilerData,
+                     int,          /* sequence number. */
+                     std::string   /* pickled Value of process type. */)
+
 // Sent to child processes to dump their handle table.
 IPC_MESSAGE_CONTROL0(ChildProcessMsg_DumpHandles)
 
 ////////////////////////////////////////////////////////////////////////////////
 // Messages sent from the child process to the browser.
 
 IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_ShutdownRequest)
 
 // Notify the browser that this child process supports tracing.
 IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_ChildSupportsTracing)
 
 // Reply from child processes acking ChildProcessMsg_TraceChangeStatus(false).
 IPC_MESSAGE_CONTROL1(ChildProcessHostMsg_EndTracingAck,
                      std::vector<std::string> /* known_categories */)
 
 // Sent if the trace buffer becomes full.
 IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_TraceBufferFull)
 
 // Child processes send trace data back in JSON chunks.
 IPC_MESSAGE_CONTROL1(ChildProcessHostMsg_TraceDataCollected,
                      std::string /*json trace data*/)
 
 // Reply to ChildProcessMsg_GetTraceBufferPercentFull.
 IPC_MESSAGE_CONTROL1(ChildProcessHostMsg_TraceBufferPercentFullReply,
                      float /*trace buffer percent full*/)
 
+// Send back profiler data (ThreadData in tracked_objects) as a pickled string.
+IPC_MESSAGE_CONTROL2(ChildProcessHostMsg_ChildProfilerData,
+                     int, /* sequence number. */
+                     std::string /* pickled Value containing profiler data. */)

[jam, 2011/11/19 23:36:25]

just send the DictionaryValue directly here, and let the IPC code automatically
serialize it to a string

[ramant (doing other things), 2011/11/25 23:59:48]

Done.

+
+// Check if profiler is enabled in browser process or not. Browser process
+// responds by sending ChildProcessMsg_SetProfilerStatus message to the child
+// process (as specified by the child process id).
+IPC_MESSAGE_CONTROL1(ChildProcessHostMsg_IsProfilerEnabled,
+                     base::ProcessId /* child process id (pid) */ )
+
 // Reply to ChildProcessMsg_DumpHandles when handle table dump is complete.
 IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_DumpHandlesDone)
 
 #if defined(OS_WIN)
 // Request that the given font be loaded by the host so it's cached by the
 // OS. Please see ChildProcessHost::PreCacheFont for details.
 IPC_SYNC_MESSAGE_CONTROL1_0(ChildProcessHostMsg_PreCacheFont,
                             LOGFONT /* font data */)
 
 // Release the cached font
 IPC_MESSAGE_CONTROL0(ChildProcessHostMsg_ReleaseCachedFonts)
 #endif  // defined(OS_WIN)
 
 // Asks the browser to create a block of shared memory for the child process to
 // fill in and pass back to the browser.
 IPC_SYNC_MESSAGE_CONTROL1_1(ChildProcessHostMsg_SyncAllocateSharedMemory,
                             uint32 /* buffer size */,
                             base::SharedMemoryHandle)