[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.6-388-ga06c6bd

[fche@sourceware.org]

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- Log -----------------------------------------------------------------
commit a06c6bd3c6a7ea89f6387c4a29d977b95865a12c
Author: Frank Ch. Eigler <fche@redhat.com>
Date:   Mon Nov 7 14:20:26 2011 -0500

    PR13386: avoid _stp_printf() crash for null context / %M or %m
    
    If _stp_printf() were invoked with %M or %m directive that resulted in
    an error, it likes to write into the current stap probe handler
    context about it.  However, _stp_printf is sometimes used outside
    probe handler context, in which case no context is actually available,
    such as during module_exit().  So we tolerate a null context pointer
    (it just having been deallocated).  Note that there don't exist any
    current %M/%m outputs in the runtime that could trigger this
    NULL-deref, so this is only a prophylactic measure.
    
    * runtime/vsprintf.c (_stp_vsprint_memory): Tolerate null context.

commit c114ce7ffcb39e37f6468be80ffa3fa1f18bcf0e
Author: Frank Ch. Eigler <fche@redhat.com>
Date:   Mon Nov 7 14:19:05 2011 -0500

    PR13386: disable preemption around printing-happy parts of *module_exit().
    
    * translate.cxx (c_unparser::emit_module_exit): Since we use stp_printf
      (that internally is preempt-sensitive), we need to disable preemption
      (or at least cpu switching) during this stage.

commit fcf41197e6e1500b60aba1c838e2d9fe53e2c98a
Author: Frank Ch. Eigler <fche@redhat.com>
Date:   Mon Nov 7 14:18:44 2011 -0500

    PR13338: make test case pass even without coreutils-debuginfo

-----------------------------------------------------------------------

Summary of changes:
 runtime/vsprintf.c                   |    6 ++++--
 testsuite/systemtap.base/bz13338.exp |    4 ++++
 translate.cxx                        |   10 ++++++++++
 3 files changed, 18 insertions(+), 2 deletions(-)


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