win, watchdog: add flag to mark handler as disabled #10248
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Adds flags that marks WinCtrlCHandlerRoutine as disabled instead of removing it. Trying to remove the controller from the controller handle itself leads to deadlock.
bzoz
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addaleax
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Dec 13, 2016
| @@ -91,6 +91,7 @@ class SigintWatchdogHelper { | |||
| static void* RunSigintWatchdog(void* arg); | |||
| static void HandleSignal(int signum); | |||
| #else | |||
| bool watchdog_disabled_; | |||
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Tbh, I would find this a bit easier to read as watchdog_enabled_ with the logic flipped around
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It would be nicer, but with watchdog_disabled_ it is easier to tell if SigintWatchdogHelper::Start() is called for the first time and we have to register the handler or it is called after ::Stop() and we just have to flip the flag.
joaocgreis
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Dec 23, 2016
Adds flags that marks WinCtrlCHandlerRoutine as disabled instead of removing it. Trying to remove the controller from the controller handle itself leads to deadlock. PR-URL: #10248 Reviewed-By: Anna Henningsen <[email protected]>
evanlucas
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Jan 3, 2017
Adds flags that marks WinCtrlCHandlerRoutine as disabled instead of removing it. Trying to remove the controller from the controller handle itself leads to deadlock. PR-URL: #10248 Reviewed-By: Anna Henningsen <[email protected]>
evanlucas
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Jan 4, 2017
Adds flags that marks WinCtrlCHandlerRoutine as disabled instead of removing it. Trying to remove the controller from the controller handle itself leads to deadlock. PR-URL: #10248 Reviewed-By: Anna Henningsen <[email protected]>
MylesBorins
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Jan 23, 2017
Adds flags that marks WinCtrlCHandlerRoutine as disabled instead of removing it. Trying to remove the controller from the controller handle itself leads to deadlock. PR-URL: #10248 Reviewed-By: Anna Henningsen <[email protected]>
MylesBorins
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Jan 24, 2017
Adds flags that marks WinCtrlCHandlerRoutine as disabled instead of removing it. Trying to remove the controller from the controller handle itself leads to deadlock. PR-URL: #10248 Reviewed-By: Anna Henningsen <[email protected]>
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MylesBorins
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Jan 31, 2017
Adds flags that marks WinCtrlCHandlerRoutine as disabled instead of removing it. Trying to remove the controller from the controller handle itself leads to deadlock. PR-URL: #10248 Reviewed-By: Anna Henningsen <[email protected]>
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Checklist
make -j4 test(UNIX), orvcbuild test nosign(Windows) passesAffected core subsystem(s)
win, watchdog
Description of change
When calling
process.exitfromSIGHUPhandler current code tries to remove CTRL-C handler (WinCtrlCHandlerRoutine) by callingSetConsoleCtrlHandler. This however leads to deadlock, sinceSetConsoleCtrlHandlerblocks util all control handlers exits.This commit adds flags that marks
WinCtrlCHandlerRoutineas disabled instead of removing it.When libuv/libuv#1168 lands, toogether it will fix #10165
cc: @addaleax @bnoordhuis