https://sourceware.org/bugzilla/show_bug.cgi?id=33854
Bug ID: 33854
Summary: elfutils 0.194 introduced regression in
libdwfl_stacktrace dwflst_perf_sample_getframes
Product: elfutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: general
Assignee: unassigned at sourceware dot org
Reporter: serhei at serhei dot io
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
In commit 3ce0d5ed, I missed the fact that dwflst_perf_sample_getframes needs
to handle the case of an unattached Dwfl, when dwfl->process->ebl is not yet
available to translate the registers. Thus, it needs to attach the Dwfl with
the same code as in the dwflst_sample_getframes() implementation.
(Incidentally, this means dwflst_perf_sample_getframes is not a straightforward
wrapper of the existing code, so (cf patch review comments at the time) we
can't get rid of it in favour of having the client use dwflst_sample_getframes,
since the client would need to cross encapsulation boundaries to handle an
unattached Dwfl.)
I have a fix for this in my branch (commit 205f8b5f1) which I'll clean up and
submit to the main branch.
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