[Bug c++/53377] New: Thread Cancellation causing aborts due to improper handling of abi::__forced_unwind
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53377 Bug #: 53377 Summary: Thread Cancellation causing aborts due to improper handling of abi::__forced_unwind Classification: Unclassified Product: gcc Version: 4.6.2 Status: UNCONFIRMED Severity: blocker Priority: P3 Component: c++ AssignedTo: unassig...@gcc.gnu.org ReportedBy: mikedal...@enginsol.com
[Bug c++/53377] Thread Cancellation causing aborts due to improper handling of abi::__forced_unwind
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53377 --- Comment #1 from Mike Dalpee mikedalpee at enginsol dot com 2012-05-16 13:38:57 UTC --- Created attachment 27424 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=27424 Cancelling thread in function with throw() specification causes abort
[Bug c++/53377] Thread Cancellation causing aborts due to improper handling of abi::__forced_unwind
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53377 --- Comment #2 from Mike Dalpee mikedalpee at enginsol dot com 2012-05-16 13:40:38 UTC --- Created attachment 27425 -- http://gcc.gnu.org/bugzilla/attachment.cgi?id=27425 Cancelling a thread while in an exception handler causes abort
[Bug c++/53377] Thread Cancellation causing aborts due to improper handling of abi::__forced_unwind
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53377 --- Comment #3 from Mike Dalpee mikedalpee at enginsol dot com 2012-05-16 13:43:33 UTC --- Please refer to this thread in gcc-help for a lot more information: GCC 4.6.2 C++ thread cancellation issue
[Bug c++/45479] Exceptions not delivered properly after thread cancellation
--- Comment #11 from mikedalpee at enginsol dot com 2010-09-02 13:43 --- Created an attachment (id=21663) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21663action=view) Workaround for the problem. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45479] Exceptions not delivered properly after thread cancellation
--- Comment #12 from mikedalpee at enginsol dot com 2010-09-02 13:44 --- Created an attachment (id=21664) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21664action=view) output of the workaround -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45479] Exceptions not delivered properly after thread cancellation
--- Comment #13 from mikedalpee at enginsol dot com 2010-09-02 13:46 --- Simply adding an additional scope to the catch part of the function f2 try block caused the program to execute properly. So is this a code generation bug or a glibc bug? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45479] Exceptions not delivered properly after thread cancellation
--- Comment #14 from mikedalpee at enginsol dot com 2010-09-03 00:05 --- Created an attachment (id=21679) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21679action=view) Program that demostrates the bug -- mikedalpee at enginsol dot com changed: What|Removed |Added Attachment #21633|0 |1 is obsolete|| Attachment #21635|0 |1 is obsolete|| Attachment #21637|0 |1 is obsolete|| Attachment #21663|0 |1 is obsolete|| Attachment #21664|0 |1 is obsolete|| http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45479] Exceptions not delivered properly after thread cancellation
--- Comment #15 from mikedalpee at enginsol dot com 2010-09-03 00:24 --- I have spent a lot more time playing around with this, and after running the exception1 program numerous times, the behaviour oscillates between working correctly or not working at all. So there appears to be some sort of race condition during the the stack unwinding process that results from a thread cancellation. In particular, it does not appear that the thread is being reliably cancelled at the pthread_testcancel call - sometimes f2 seems to run beyond the pthread_testcancel, which causes the throw to execute, and results in an abort (seems to want to act like an uncaught exception propagated out). If you comment out the throw, f2 will sometimes continue to construct additional objects past 50. I have also noticed that sometimes a bunch of the Y objects get destructed, but then the program suddenly summarily exits. I also tried setting the cancellation type to asynchronous, but that doesn't make any difference - sometimes it works, sometimes it don't. Its very unpredictable. In any case, I need someone to tell me if this is the appropriate place to have aired this particular bug, or would it be better placed in the glibc bugzilla. I really do need this to work reliably so my 400K+ SLOC port can have a chance to work without requiring a major redesign of the underlying thread framework. FYI, this has been working flawlessly under Solaris/Sun Studio C++ for the last 10 years. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45479] New: Exceptions not delivered properly after thread cancellation
[r...@localhost Desktop]# gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/home/apps/gnu/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../gcc-4.6-20100828/configure --prefix=/apps/gnu --disable-bootstrap --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-languages=c,c++ --with-ppl=/apps/gnu --with-cloog=/apps/gnu --with-mpc=/apps/gnu --with-mpfr=/apps/gnu --with-gmp=/apps/gnu --with-libelf=/apps/gnu --disable-multilib --disable-werror Thread model: posix gcc version 4.6.0 20100828 (experimental) (GCC) When a thread is cancelled via pthread_cancel, the cancelled thread's stack is not being unwound properly and exception delivery is bugged. This issue is preventing me from being able to port a working system from Sun Studio/Solaris to gcc/Linux. -- Summary: Exceptions not delivered properly after thread cancellation Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: blocker Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: mikedalpee at enginsol dot com GCC build triplet: x86_64-unknown-linux GCC host triplet: x86_64-unknown-linux GCC target triplet: x86_64-unknown-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45479] Exceptions not delivered properly after thread cancellation
--- Comment #1 from mikedalpee at enginsol dot com 2010-09-01 13:13 --- Created an attachment (id=21633) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21633action=view) Program that demonstrates the bug -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45479] Exceptions not delivered properly after thread cancellation
--- Comment #2 from mikedalpee at enginsol dot com 2010-09-01 13:13 --- Created an attachment (id=21634) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21634action=view) script that builds the bug program -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45479] Exceptions not delivered properly after thread cancellation
--- Comment #3 from mikedalpee at enginsol dot com 2010-09-01 13:16 --- Created an attachment (id=21635) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21635action=view) output of the bug program -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45479] Exceptions not delivered properly after thread cancellation
--- Comment #4 from mikedalpee at enginsol dot com 2010-09-01 13:27 --- Created an attachment (id=21637) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21637action=view) Expected output of bug program - generated on Solaris 9 using Sun Studio 12. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45479] Exceptions not delivered properly after thread cancellation
--- Comment #5 from mikedalpee at enginsol dot com 2010-09-01 13:32 --- This bug occurs across all versions of the compiler I have tested - 4.3, 4.4, 4.5, and 4.6. The bug is preventing me from porting software, because correct destructor excecution in a cancelled thread is fundamental to the proper functioning of this software. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45481] New: Exception is erroneously rethrown from a constructor initializer try/catch block
[r...@localhost exception1]# gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/home/apps/gnu/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper Target: x86_64-unknown-linux-gnu Configured with: ../gcc-4.6-20100828/configure --prefix=/apps/gnu --disable-bootstrap --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-languages=c,c++ --with-ppl=/apps/gnu --with-cloog=/apps/gnu --with-mpc=/apps/gnu --with-mpfr=/apps/gnu --with-gmp=/apps/gnu --with-libelf=/apps/gnu --disable-multilib --disable-werror Thread model: posix gcc version 4.6.0 20100828 (experimental) (GCC) -- Summary: Exception is erroneously rethrown from a constructor initializer try/catch block Product: gcc Version: 4.6.0 Status: UNCONFIRMED Severity: critical Priority: P3 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: mikedalpee at enginsol dot com GCC build triplet: x86_64-unknown-linux GCC host triplet: x86_64-unknown-linux GCC target triplet: x86_64-unknown-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45481
[Bug c++/45481] Exception is erroneously rethrown from a constructor initializer try/catch block
--- Comment #1 from mikedalpee at enginsol dot com 2010-09-01 13:36 --- Created an attachment (id=21638) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21638action=view) Program that demonstrates the bug -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45481
[Bug c++/45481] Exception is erroneously rethrown from a constructor initializer try/catch block
--- Comment #2 from mikedalpee at enginsol dot com 2010-09-01 13:36 --- Created an attachment (id=21639) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21639action=view) script that builds the bug program -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45481
[Bug c++/45481] Exception is erroneously rethrown from a constructor initializer try/catch block
--- Comment #3 from mikedalpee at enginsol dot com 2010-09-01 13:38 --- Created an attachment (id=21640) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21640action=view) output of the bug program -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45481
[Bug c++/45481] Exception is erroneously rethrown from a constructor initializer try/catch block
--- Comment #4 from mikedalpee at enginsol dot com 2010-09-01 13:41 --- Created an attachment (id=21641) -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21641action=view) Expected output of bug program -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45481
[Bug c++/45479] Exceptions not delivered properly after thread cancellation
--- Comment #9 from mikedalpee at enginsol dot com 2010-09-02 01:13 --- That fix didn't change the behaviour one bit for me - was there more to it than just moving the two lines from where they were to the exception handler? Also, as I am new to this venue, could you please tell me where I can find the reference material you cited? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45479
[Bug c++/45481] Exception is erroneously rethrown from a constructor initializer try/catch block
--- Comment #7 from mikedalpee at enginsol dot com 2010-09-02 01:16 --- Ah, ok, that makes good sense. Thanks for the clarification. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45481
