[Bug general/4676] New: incorrect back trace produced by libunwind

[Bug general/4676] New: incorrect back trace produced by libunwind

[swagiaal at redhat dot com]

1)
testFrameAdjustedAddress(frysk.rt.TestFrameDebugInfo)junit.framework.AssertionFailedError:
fourth

(test coming soon to cvs)

-- 
           Summary: incorrect back trace produced by libunwind
           Product: frysk
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: general
        AssignedTo: frysk-bugzilla at sourceware dot org
        ReportedBy: swagiaal at redhat dot com
OtherBugsDependingO 3076
             nThis:


http://sourceware.org/bugzilla/show_bug.cgi?id=4676

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[Bug general/4676] incorrect back trace produced by libunwind

[swagiaal at redhat dot com]

------- Additional Comments From swagiaal at redhat dot com  2007-06-20 18:53 -------
Test program:

#include <stdlib.h>

void fourth(){
  exit(1);
}

void third(){
  fourth();
}

void second(){
  third();
}

void first(){
  second();
}


int main(){
  first ();
  return 0;
}



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[Bug general/4676] incorrect back trace produced by libunwind

[swagiaal at redhat dot com]

------- Additional Comments From swagiaal at redhat dot com  2007-06-20 18:54 -------
Stack trace:

#0 0x00b19402 in __kernel_vsyscall ()
#1 0x0051efc4 in __GI__exit ()
#2 0x08048374 in third ()
#3 0x080483a9 in third ()
#4 0x080483c6 in second ()
#5 0x080483e3 in first ()
#6 0x08048410 in main ()
#7 0x004a6f2c in __libc_start_main ()
#8 0x080482f1 in _start ()

Frame #2 is incorrect. It should be fourth

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[Bug general/4676] incorrect back trace produced by libunwind

[swagiaal at redhat dot com]

------- Additional Comments From swagiaal at redhat dot com  2007-06-20 19:53 -------
Test is now in cvs 

Index: frysk-core/frysk/pkglibdir/ChangeLog
2007-06-20  Sami Wagiaalla  <swagiaal@redhat.com>

       * funit-stacks-exit.c: New.

Index: frysk-core/frysk/rt/ChangeLog
2007-06-20  Sami Wagiaalla  <swagiaal@redhat.com>

       * TestFrameDebugInfo.java (testFrameAdjustedAddress): New test.

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[Bug general/4676] incorrect back trace produced by libunwind

[swagiaal at redhat dot com]

------- Additional Comments From swagiaal at redhat dot com  2007-08-17 13:06 -------
Also on a 32 bit machine:

[swagiaal@towns frysk-core]$ ./frysk/bindir/fstack $$
Task #505
#0 0x0051d402 in __kernel_vsyscall () from [vdso]
#1 0x00337d69 in __waitpid_nocancel () from /lib/libc-2.6.so
#2 0x100f41dd in [unknown] from Unknown
#3 0x0807bfa8 in wait_for () from /bin/bash
#4 0x0806eedd in execute_command_internal () from /bin/bash
#5 0x0806f923 in execute_command () from /bin/bash
#6 0x0805ef61 in reader_loop () from /bin/bash
#7 0x0805ea70 in main () from /bin/bash
#8 0x002bdf70 in __libc_start_main () from /lib/libc-2.6.so
#9 0x0805c6c1 in _start () from /bin/bash
[swagiaal@towns frysk-core]$ pstack $$
#0  0x0051d402 in __kernel_vsyscall ()
#1  0x00337d73 in __waitpid_nocancel () from /lib/libc.so.6
#2  0x0807a12d in ?? ()
#3  0x0807bfa8 in wait_for ()
#4  0x0806eedd in execute_command_internal ()
#5  0x0806f923 in execute_command ()
#6  0x0805ef61 in reader_loop ()
#7  0x0805ea70 in main ()


The addresses are different between the two stack back traces.


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