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  1. C++ Standard Library
  2. STDCXX-625

[IBM XLC++ 9.0/AIX 5.3] SIGSEGV in 0.process

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 4.2.0
    • Fix Version/s: 4.2.1
    • Component/s: Tests
    • Labels:
      None
    • Environment:

      HP-UX or AIX platforms

    • Patch Info:
      Patch Available
    • Severity:
      Incorrect Behavior

      Description

      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
      

        Attachments

        1. test.cpp
          1 kB
          Travis Vitek
        2. stdcxx-625.patch
          7 kB
          Travis Vitek

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            • Assignee:
              vitek Travis Vitek
              Reporter:
              vitek Travis Vitek
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              Dates

              • Created:
                Updated:
                Resolved: