[Bug runtime/12645] exelib.exp failures (and hung stapio's) on s390x

[dsmith at redhat dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12645

--- Comment #2 from David Smith <dsmith at redhat dot com> 2011-04-18 21:21:48 UTC ---
Here's a further update.  Normally, the exelib.exp test uses the
libmarkunamestack.stp script which tests several things at once.  Optionally,
you can run lib.stp, mark.stp, uname.stp, or ustack.stp to test things
individually.  The hang doesn't occur when using lib.stp, uname.stp, or
ustack.stp - only when using mark.stp.  The mark.stp script tests userspace
probes being hit in the main program and the shared library.

# stap -w --ldd /root/src/testsuite/systemtap.exelib/mark.stp
./uprobesgcc-O3default-debug-uprobeslibgcc-O3default-prelink-debug_exe
./libuprobeslibgcc-O3default-prelink-debug.so -c
./uprobesgcc-O3default-debug-uprobeslibgcc-O3default-prelink-debug_exe 
main_count: 3
main_count: 2
main_count: 1

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