Profiling process topology

chrome/app/chrome_main.cc

 // 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 <stdint.h>
 
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "chrome/app/chrome_main_delegate.h"
+#include "chrome/browser/profiling_host/profiling_process_host.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/features.h"
 #include "content/public/app/content_main.h"
 #include "content/public/common/content_switches.h"
 #include "headless/public/headless_shell.h"
 #include "ui/gfx/switches.h"
 
 #if BUILDFLAG(ENABLE_OOP_HEAP_PROFILING)
 #include "chrome/common/profiling/memlog_sender.h"
 #include "chrome/profiling/profiling_main.h"
@@ skipping 79 matching lines @@
 #if defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_WIN)
   if (command_line->HasSwitch(switches::kHeadless)) {
 #if defined(OS_MACOSX)
     SetUpBundleOverrides();
 #endif
     return headless::HeadlessShellMain(params);
   }
 #endif  // defined(OS_LINUX) || defined(OS_MACOSX) || defined(OS_WIN)
 
 #if BUILDFLAG(ENABLE_OOP_HEAP_PROFILING)
-#if !defined(OS_WIN) || defined(CHROME_MULTIPLE_DLL_BROWSER)
+#if !defined(OS_WIN) || defined(COMPONENT_BUILD) || \
+    defined(CHROME_MULTIPLE_DLL_BROWSER)
   // The profiling server is only compiled into the browser process. On Windows,
-  // it should be called only for CHROME_MULTIPLE_DLL_BROWSER.
+  // non-component builds, browser code is only used for
+  // CHROME_MULTIPLE_DLL_BROWSER.
   if (command_line->HasSwitch(switches::kMemlog))
+    profiling::ProfilingProcessHost::EnsureStarted();
+#endif
+  // The profiling process. This is a child process type implemented at the
+  // Chrome layer rather than the content layer (like the other child procs.).
+  if (command_line->GetSwitchValueASCII(switches::kProcessType) ==
+      switches::kProfiling)
     return profiling::ProfilingMain(*command_line);
-#endif
   profiling::InitMemlogSenderIfNecessary(*command_line);
 #endif  // ENABLE_OOP_HEAP_PROFILING
 
 #if defined(OS_CHROMEOS) && BUILDFLAG(ENABLE_PACKAGE_MASH_SERVICES)
   if (service_manager::ServiceManagerIsRemote())
     params.env_mode = aura::Env::Mode::MUS;
 #endif  // BUILDFLAG(ENABLE_PACKAGE_MASH_SERVICES)
 
   int rv = content::ContentMain(params);
 
   return rv;
 }