* [Bug runtime/13447] New: fallback kernel stacktrace (dump_trace) not available on arm, ppc or s390
@ 2011-11-29 10:10 mjw at redhat dot com
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From: mjw at redhat dot com @ 2011-11-29 10:10 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13447
Bug #: 13447
Summary: fallback kernel stacktrace (dump_trace) not available
on arm, ppc or s390
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: runtime
AssignedTo: systemtap@sourceware.org
ReportedBy: mjw@redhat.com
Classification: Unclassified
For some probe points (begin, end, tracepoints) the dwarf unwinder cannot be
used since there is no register context available. In these cases kernel
backtraces are provided through the kernel dump_trace() facility. Whether this
is available is tested through runtime/autoconf-save-stack-trace.c which will
set
STAPCONF_KERNEL_STACKTRACE.
Currently this fallback unwinder is only available on i686/x86_64, but not on
arm, ppc or s390. See testsuite/systemtap.base/backtrace.exp.
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2011-11-29 10:10 [Bug runtime/13447] New: fallback kernel stacktrace (dump_trace) not available on arm, ppc or s390 mjw at redhat dot com
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