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From: "fche at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sourceware.org
Subject: [Bug translator/29676] New: wildcard function/symbol expansion
 inconsistent in debuginfo vs nondebuginfo cases
Date: Wed, 12 Oct 2022 18:12:07 +0000
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X-Bugzilla-Who: fche at redhat dot com
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29676

            Bug ID: 29676
           Summary: wildcard function/symbol expansion inconsistent in
                    debuginfo vs nondebuginfo cases
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
          Assignee: systemtap at sourceware dot org
          Reporter: fche at redhat dot com
  Target Milestone: ---

Binaries sometimes contain symbol tables or minidebuginfo that systemtap can
resolve process probes within:

    stap -L 'process("/lib64/libc.so.6").function("__memset*")'

which match a bunch of assembler ifunc alternative functions by symbol name.

Unfortunately, if dwarf for this package is also available, then stap will
apparently only process the dwarf symbols, and not the minidebuginfo stuff,
so the same wildcard will produce an apprx. empty match list.

We should use the union of the two data sources if possible.

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