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, 4 insertions, 2 deletions

diff --git a/base/file_descriptor_shuffle.cc b/base/file_descriptor_shuffle.cc
index 28447c9..b26ea7f 100644
--- a/base/file_descriptor_shuffle.cc
+++ b/base/file_descriptor_shuffle.cc
@@ -21,8 +21,10 @@ bool PerformInjectiveMultimap(const InjectiveMultimap& m_in,
     int temp_fd = -1;
 
     // We DCHECK the injectiveness of the mapping.
-    for (InjectiveMultimap::iterator j = i + 1; j != m.end(); ++j)
-      DCHECK(i->dest != j->dest);
+    for (InjectiveMultimap::iterator j = i + 1; j != m.end(); ++j) {
+      DCHECK(i->dest != j->dest) << "Both fd " << i->source
+          << " and " << j->source << " map to " << i->dest;
+    }
 
     const bool is_identity = i->source == i->dest;