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Posted to issues@stdcxx.apache.org by "Martin Sebor (JIRA)" <ji...@apache.org> on 2008/01/21 20:06:37 UTC
[jira] Commented: (STDCXX-625) [IBM XLC++ 9.0/AIX 5.3] SIGSEGV in
0.process
[ https://issues.apache.org/jira/browse/STDCXX-625?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12561095#action_12561095 ]
Martin Sebor commented on STDCXX-625:
-------------------------------------
Is the patch ready to be committed?
> [IBM XLC++ 9.0/AIX 5.3] SIGSEGV in 0.process
> --------------------------------------------
>
> Key: STDCXX-625
> URL: https://issues.apache.org/jira/browse/STDCXX-625
> Project: C++ Standard Library
> Issue Type: Bug
> Components: Tests
> Affects Versions: 4.2.0
> Environment: HP-UX or AIX platforms
> Reporter: Travis Vitek
> Assignee: Travis Vitek
> Fix For: 4.2.1
>
> Attachments: stdcxx-625.patch, test.cpp
>
>
> It appears that when we re-register for the signal from within the user signal handler the user signal handler is immediately invoked again. This recursion causes a stack overflow and a crash. Here is the stack on AIX....
> sig_handler(int)( = 20), line 528 in "process.cpp"
> sigaction(??, ??, ??) at 0xd01fa358
> signal(??, ??) at 0xd02759a8
> sig_handler(int)( = 20), line 528 in "process.cpp"
> sigaction(??, ??, ??) at 0xd01fa358
> signal(??, ??) at 0xd02759a8
> sig_handler(int)( = 20), line 528 in "process.cpp"
> nsleep(??, ??) at 0xd01fa1d4
> sleep(??) at 0xd02051d4
> unnamed block $b656, line 553 in "process.cpp"
> rw_waitpid(long,int*,int)(pid = 782442, result = 0x2ff226a0, timeout = 5), line 553 in "process.cpp"
> join_test(long,bool)(pid = 782442, should_hang = false), line 51 in "0.process.cpp"
> test_process_create1()(), line 109 in "0.process.cpp"
> run_test(int,char**)(argc = 1, argv = 0x2ff22a60), line 276 in "0.process.cpp"
> rw_vtest(int,char**,const char*,const char*,const char*,int(*)(int,char**),const char*,char*)(argc = 1, argv = 0x2ff22a60, file_name = "/amd/devco/vitek/stdcxx-trunk/tests/self/0.process.cpp", clause = "0.process", comment = "", fun = 0x2000b85c, optstr = "|-child#0 |-timeout#", va = " "), line 1030 in "driver.cpp"
> rw_test(int,char**,const char*,const char*,const char*,int(*)(int,char**),const char*,...)(argc = 1, argv = 0x2ff22a60, fname = "/amd/devco/vitek/stdcxx-trunk/tests/self/0.process.cpp", clause = "0.process", comment = "", testfun = 0x2000b85c, optstr = "|-child#0 |-timeout#", ... = 0x20009608), line 1128 in "driver.cpp"
> main(argc = 1, argv = 0x2ff22a60), line 299 in "0.process.cpp"
> Here is the stack on HP-UX
> #0 sig_handler (No.Identifier=18) at /amd/devco/vitek/stdcxx-trunk/tests/src/process.cpp:529
> #1 <signal handler called>
> #2 0x7b0086c0 in _sigvector+0x10 () from /usr/lib/libc.2
> #3 0x7b00f114 in signalvector+0xac () from /usr/lib/libc.2
> #4 0x7b00f020 in signal+0xa0 () from /usr/lib/libc.2
> #5 0x187fc in sig_handler (No.Identifier=18) at /amd/devco/vitek/stdcxx-trunk/tests/src/process.cpp:529
> #6 <signal handler called>
> #7 0x7b0086c0 in _sigvector+0x10 () from /usr/lib/libc.2
> #8 0x7b00f114 in signalvector+0xac () from /usr/lib/libc.2
> #9 0x7b00f020 in signal+0xa0 () from /usr/lib/libc.2
> #10 0x187fc in sig_handler (No.Identifier=18) at /amd/devco/vitek/stdcxx-trunk/tests/src/process.cpp:529
> #11 <signal handler called>
> #12 0x7b0086c0 in _sigvector+0x10 () from /usr/lib/libc.2
> #13 0x7b00f114 in signalvector+0xac () from /usr/lib/libc.2
> #14 0x7b00f020 in signal+0xa0 () from /usr/lib/libc.2
> #15 0x187fc in sig_handler (No.Identifier=18) at /amd/devco/vitek/stdcxx-trunk/tests/src/process.cpp:529
> #16 <signal handler called>
> #17 0x7b0086c0 in _sigvector+0x10 () from /usr/lib/libc.2
> #18 0x7b00f114 in signalvector+0xac () from /usr/lib/libc.2
> #19 0x7b00f020 in signal+0xa0 () from /usr/lib/libc.2
> #20 0x187fc in sig_handler (No.Identifier=18) at /amd/devco/vitek/stdcxx-trunk/tests/src/process.cpp:529
> #21 <signal handler called>
> #22 0x7b00a160 in __sigtimedwait_sys+0x10 () from /usr/lib/libc.2
> #23 0x7b013c84 in sigtimedwait+0x6c () from /usr/lib/libc.2
> #24 0x7afa2a50 in sleep+0xe8 () from /usr/lib/libc.2
> #25 0x188f0 in rw_waitpid (pid=13825, result=0x7f7f0db0, timeout=5)
> at /amd/devco/vitek/stdcxx-trunk/tests/src/process.cpp:555
> #26 0x15250 in join_test (pid=13825, should_hang=false) at /amd/devco/vitek/stdcxx-trunk/tests/self/0.process.cpp:51
> #27 0x15424 in test_process_create1 () at /amd/devco/vitek/stdcxx-trunk/tests/self/0.process.cpp:109
> #28 0x159b4 in run_test (argc=1, argv=0x7f7f08d4) at /amd/devco/vitek/stdcxx-trunk/tests/self/0.process.cpp:276
> #29 0x16d1c in rw_vtest (argc=1, argv=0x7f7f08d4,
> file_name=0x8e090 "/amd/devco/vitek/stdcxx-trunk/tests/self/0.process.cpp", clause=0x8e528 "0.process",
> comment=0x8e08f "", fun=0x4001ed52 <run_test(int, char **)>, optstr=0x8e534 "|-child#0 |-timeout#", va=0x7f7f0a34)
> at /amd/devco/vitek/stdcxx-trunk/tests/src/driver.cpp:1030
> #30 0x171ec in rw_test (argc=1, argv=0x7f7f08d4, fname=0x8e090 "/amd/devco/vitek/stdcxx-trunk/tests/self/0.process.cpp",
> clause=0x8e528 "0.process", comment=0x8e08f "", testfun=0x4001ed52 <run_test(int, char **)>,
> optstr=0x8e534 "|-child#0 |-timeout#") at /amd/devco/vitek/stdcxx-trunk/tests/src/driver.cpp:1127
> #31 0x15ad4 in main (argc=1, argv=0x7f7f08d4) at /amd/devco/vitek/stdcxx-trunk/tests/self/0.process.cpp:299
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