Prototype implementation of zygotes.

Limitations that need addressing still:
- Doesn't forcibly terminate children that should have exited but haven't

Enable with env var ENABLE_ZYGOTE_MANAGER=1.

BUG=11841
TEST=
start the browser, then make chrome and all .pak files unreadable; or alternately, start an installed browser, and uninstall the browser while it's running.  Then create a new tab and browse to two new sites. 

Here's an example script to hide and unhide the .pak files (note: do not move the directory they're in, that doesn't work):

#!/bin/sh
chmod_all() {
   chmod $1 sconsbuild/Debug/chrome
   for path in . locales obj/chrome/app/intermediate/repack obj/global_intermediate/* themes
   do
     chmod $1 sconsbuild/Debug/$path/*.pak
   done
}
case $1 in
hide) chmod_all 000 ;;
show) chmod_all 755 ;;
esac


Review URL: http://codereview.chromium.org/115773

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@17840 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 15 insertions, 0 deletions

diff --git a/chrome/app/chrome_dll_main.cc b/chrome/app/chrome_dll_main.cc
index 006d923..b6ba22f 100644
--- a/chrome/app/chrome_dll_main.cc
+++ b/chrome/app/chrome_dll_main.cc
@@ -45,6 +45,9 @@
 #if defined(OS_WIN)
 #include "base/win_util.h"
 #endif
+#if defined(OS_LINUX)
+#include "base/zygote_manager.h"
+#endif
 #if defined(OS_MACOSX)
 #include "chrome/app/breakpad_mac.h"
 #elif defined(OS_LINUX)
@@ -292,6 +295,18 @@ int ChromeMain(int argc, const char** argv) {
   // Initialize the command line.
 #if defined(OS_WIN)
   CommandLine::Init(0, NULL);
+#elif defined(OS_LINUX)
+  base::ZygoteManager* zm = base::ZygoteManager::Get();
+  std::vector<std::string>* zargv = NULL;
+  if (zm)
+    zargv = zm->Start();
+  if (zargv) {
+    // Forked child.
+    CommandLine::Init(*zargv);
+  } else {
+    // Original process.
+    CommandLine::Init(argc, argv);
+  }
 #else
   CommandLine::Init(argc, argv);
 #endif