[GHC] #9423: shutdownCapability sometimes loops indefinitely on OSX after hs_exit()
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Mon Feb 2 16:05:07 UTC 2015
#9423: shutdownCapability sometimes loops indefinitely on OSX after hs_exit()
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Reporter: AndreasVoellmy | Owner:
Type: bug | Status: closed
Priority: normal | Milestone: 7.10.1
Component: Runtime System | Version: 7.8.2
Resolution: fixed | Keywords:
Operating System: MacOS X | Architecture:
Type of failure: Incorrect result | Unknown/Multiple
at runtime | Test Case:
Blocked By: | Blocking:
Related Tickets: 9284 | Differential Revisions: Phab:D129
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Comment (by Andreas Voellmy <andreas.voellmy@…>):
In [changeset:"92c93544939199f6ef758e1658149a971d4437c9/ghc"]:
{{{
#!CommitTicketReference repository="ghc"
revision="92c93544939199f6ef758e1658149a971d4437c9"
Fix #10017
Summary:
In the threaded RTS, a signal is delivered from the RTS to Haskell
user code by writing to file that one of the IO managers watches (via
an instance of GHC.Event.Control.Control). When the IO manager
receives the signal, it calls GHC.Conc.Signal.runHandlers to invoke
Haskell signal handler. In the move from a single IO manager to one IO
manager per capability, the behavior was (wrongly) extended so that a
signal is delivered to every event manager (see #9423), each of which
invoke Haskell signal handlers, leading to multiple invocations of
Haskell signal handlers for a single signal. This change fixes this
problem by having the RTS (in generic_handler()) notify only the
Control instance used by the TimerManager, rather than all the
per-capability IO managers.
Reviewers: austin, hvr, simonmar, Mikolaj
Reviewed By: simonmar, Mikolaj
Subscribers: thomie
Differential Revision: https://phabricator.haskell.org/D641
}}}
--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9423#comment:10>
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