Use WaitForDebuggerChildren to let renderer wait for gdb

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 35af2649b809c8b2aaed14ee754b95e2589b5be2..546f32d23951aaf889f1d594d12577069aa2b9e3 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -639,6 +639,10 @@ bool RenderProcessHostImpl::Init() {
     if (!renderer_prefix.empty())
       cmd_line->PrependWrapper(renderer_prefix);
     AppendRendererCommandLine(cmd_line);
+
+    if (browser_command_line.HasSwitch(switches::kWaitForDebuggerRenderer))
+      cmd_line->AppendSwitch(switches::kWaitForDebugger);

[Feng Qian, 2014/08/27 15:50:46]

Where is the code in render process that pauses and waits for debugger?

[Jaekyun Seok (inactive), 2014/08/27 16:06:13]

You can find it at
https://cs.corp.google.com/#clankium/src/content/renderer/renderer_main.cc&sq...
.

[Feng Qian, 2014/08/27 17:52:02]

Acknowledged.

+
     cmd_line->AppendSwitchASCII(switches::kProcessChannelID, channel_id);
 
     // Spawn the child process asynchronously to avoid blocking the UI thread.