[Bug general/3947] New: fstack tracing with libunwind vs dwfl.

[Bug general/3947] New: fstack tracing with libunwind vs dwfl.

[npremji at redhat dot com]

fstack with libunwind stack tracing a bash shell provides the following:
./frysk-core/frysk/bindir fstack 30546
Task #30546
#0 0x00970402 in __kernel_vsyscall ()
#1 0x00a18a33 in waitpid ()
#2 0x0807945d in  ()
#3 0x0807b288 in wait_for ()
#4 0x0806e33c in execute_command_internal ()
#5 0x0806ed73 in execute_command ()
#6 0x0806fb02 in  ()
#7 0x0806db15 in execute_command_internal ()
#8 0x0806ed73 in execute_command ()
#9 0x0805e898 in reader_loop ()
#10 0x0805e397 in main ()
#11 0x009a3724 in __libc_start_main ()
#12 0x0805bff1 in _start ()

dwfl provides:
./frysk-core/frysk/bindir fstack 30546
Task #30546
#0 0x00970402 in [unknown]
#1 0x00a18a33 in __waitpid_nocancel ()
#2 0x0807945d in [unknown]
#3 0x0807b288 in wait_for ()
#4 0x0806e33c in execute_command_internal ()
#5 0x0806ed73 in execute_command ()
#6 0x0805e898 in reader_loop ()
#7 0x0805e397 in main ()
#8 0x009a3724 in __libc_start_main ()
#9 0x0805bff1 in [unknown]

and pstack provides:
pstack 30546
#0  0x00970402 in __kernel_vsyscall ()
#1  0x00a18a33 in __waitpid_nocancel () from /lib/libc.so.6
#2  0x0807945d in get_job_by_pid ()
#3  0x0807b288 in wait_for ()
#4  0x0806e33c in execute_command_internal ()
#5  0x0806ed73 in execute_command ()
#6  0x0805e898 in reader_loop ()
#7  0x0805e397 in main ()

-- 
           Summary: fstack tracing with libunwind vs dwfl.
           Product: frysk
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: general
        AssignedTo: frysk-bugzilla at sourceware dot org
        ReportedBy: npremji at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=3947

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