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<TITLE> [Mono-bugs] [Bug 74921][Maj] Changed - The runtime doesn't work
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correctly when compiled with gcc-4.0
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<H1>[Mono-bugs] [Bug 74921][Maj] Changed - The runtime doesn't work
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correctly when compiled with gcc-4.0</H1>
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<B>bugzilla-daemon at bugzilla.ximian.com</B>
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<A HREF="mailto:mono-bugs%40lists.ximian.com?Subject=%5BMono-bugs%5D%20%5BBug%2074921%5D%5BMaj%5D%20Changed%20-%20The%20runtime%20doesn%27t%20work%0A%09correctly%20when%20compiled%20with%20gcc-4.0&In-Reply-To=bug-74921%40chernobyl.ximian.com"
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TITLE="[Mono-bugs] [Bug 74921][Maj] Changed - The runtime doesn't work
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correctly when compiled with gcc-4.0">bugzilla-daemon at bugzilla.ximian.com
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</A><BR>
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<I>Tue Jun 21 07:07:42 EDT 2005</I>
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generic fields are compiled to unverifiable code
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<PRE>Please do not reply to this email- if you want to comment on the bug, go to the
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URL shown below and enter your comments there.
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Changed by <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">norbert at spice.gia.rwth-aachen.de.</A>
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<A HREF="http://bugzilla.ximian.com/show_bug.cgi?id=74921">http://bugzilla.ximian.com/show_bug.cgi?id=74921</A>
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--- shadow/74921 2005-06-21 03:13:31.000000000 -0400
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+++ shadow/74921.tmp.29843 2005-06-21 07:07:42.000000000 -0400
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@@ -177,6 +177,21 @@
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So, what seems to happen is that the gc sees a thread multiple times
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while trying to stop the world. It then waits too many times on the
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semaphore. I've yet to figure out who's adding duplicate entries.
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------- Additional Comments From <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">bmaurer at users.sf.net</A> 2005-06-21 03:13 -------
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Should be fixed in head and 1.1.8.1. I can run monodoc and monodevelop...
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+
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+------- Additional Comments From <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">norbert at spice.gia.rwth-aachen.de</A> 2005-06-21 07:07 -------
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+This bug is fixed in 1.1.8.1 since here 'libgc' gets compiled without
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+'-fexceptions'.
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+The reason for the misbehaviour is that with '-fexceptions' the combo
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+'gcc/glibc(nptl)' uses exception based stack-unwinding and without
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+'-fexceptions' it uses legacy setjmp/longjmp based stack unwinding.
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+Since the mono runtime is compiled without '-fexceptions', stack
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+unwinding (!and calling of any thread cleanup handlers!) initiated by
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+a call of 'pthread_exit()' from the mono runtime will NOT call
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+'GC_thread_exit_proc()' if 'libgc' is compiled with '-fexceptions'.
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+So already terminated threads will remain in GC_threads[], making
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+'pthread_stop_world()' waiting for eternity.
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+For more info one may want to have a look at <pthread.h> as it comes
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+with glibc-2.3.x/nptl-enabled.
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</PRE>
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