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agl, please review changes to the waitable_event_watcher code.
Multiple sync channels if used in the same listener thread could result in calls completing in the
wrong context at times. This happens if there are nested calls on these sync channels, i.e
1. Call from client 1 on channel 1 to server 1. Message pumping is enabled for the corresponding message
2. Call from client 2 on channel 2 to server 2, Message pumping is enabled for the corresponding message
Now if a reply for 1 arrives, it should be queued until reply 2 arrives. This does not happen which
causes 2 to terminate prematurely leading to crashes, 1 waiting indefinitely at times, etc.
The fix for this issue is to maintain a local global stack for the send done event watcher object.
The global object is in the form of a TLS. This ensures that we only watch for completed events
on the outermost sync channel.
The changes in the Waitable event watcher object are to return the current delegate which is needed
to start watching the old send watcher once we are done and to ensure that the event member is set even
if it was already signaled when StartWatching was called.
I have added a unit test in ipc_tests for this case. I removed the old QueuedReply based unit tests as
they did not test the actual nested call case.
While debugging these issues I also found some issues in BrowserRenderProcessHost::OnChannelError where
it would delete a sync channel while it was in use. Based on a discussion with jam we decided to DeleteSoon
the sync channel pointer. However this broke some browser ui tests which relied on the timing of the OnChannelError notification.
We decided to leave the existing code as is for now. I removed the DCHECK on channel as it would fire repeatedly if the channel died
while multiple sync calls were waiting to complete leading to OnChannelError firing multiple times.
Bug=24427
Review URL: http://codereview.chromium.org/271033
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@28967 0039d316-1c4b-4281-b951-d872f2087c98
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This recommits r23971
Review URL: http://codereview.chromium.org/174259
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@24024 0039d316-1c4b-4281-b951-d872f2087c98
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This reverts commit 63381b4554b1190c8a87583a5c5f403815e44e83.
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@23979 0039d316-1c4b-4281-b951-d872f2087c98
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The NSSDecrptor class needs to be run in a child process on OS X, so we need to do some fancy footwork in the form of a bridge class.
Also a few small fixes for surrounding code.
BUG=18775
TEST=none
Review URL: http://codereview.chromium.org/174206
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@23971 0039d316-1c4b-4281-b951-d872f2087c98
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This splits the ipc code from the common project. The 'common' project pulls in
all of webkit, the v8 bindings, skia, googleurl, and a number of other projects
which makes it very difficult to deal with especially for external projects
wanting just to use some of Chromium's infrastructure. This puts the ipc code
into its top-level ipc/ directory with a dependency only on base. The common
project depends on the new ipc/ipc.gyp:ipc target so that all projects currently
pulling common in to get the IPC code still have it available. This mostly
follows agl's pre-gyp attempt to do this which was r13062.
Known issues:
- Currently a number of projects depend on chrome/chrome.gyp:common in order to
use the IPC infrastructure. Rather than fixing all of these dependencies I have
made common depend on ipc/ipc.gyp:ipc and added "ipc" to the include_rules
section of DEPS so that checkdeps.py doesn't complain. Over time projects that
need IPC should depend on the IPC project themselves and dependencies on common
removed, although I don't think many projects that need IPC will be able to get
away without common currently.
- ipc/ipc_message_macros.h still has #include "chrome/common/..." inside of a
ipc/ should not refer to files in chrome/... now. I'm not sure how to resolve
this since it's really an IDE bug
- the named pipe name (windows+linux) and the logging event name (all) + env
variable (posix) refer explicitly to 'Chrome' which somewhat hurts the illusion
of ipc/ being an independent library. I think this should be examined in a
subsequent, much smaller patch.
- I've eliminated the IPC.SendMsgCount counter since it was implemented in a way
to create a dependency from ipc/ to chrome/common/chrome_counters. This is the
same approach that r13062 took.
http://codereview.chromium.org/155905
(Patch from James Robinson)
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@21342 0039d316-1c4b-4281-b951-d872f2087c98
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This reverts commit r13062 which, unsurprisingly, broke the build.
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@13063 0039d316-1c4b-4281-b951-d872f2087c98
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(No review URL: Rietvelt couldn't cope)
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@13062 0039d316-1c4b-4281-b951-d872f2087c98
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