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[Bug translator/13296] New: inaccessible sdt.h operands of the form symbol(%reg)
- From: "fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Fri, 14 Oct 2011 12:14:52 +0000
- Subject: [Bug translator/13296] New: inaccessible sdt.h operands of the form symbol(%reg)
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=13296
Bug #: 13296
Summary: inaccessible sdt.h operands of the form symbol(%reg)
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: translator
AssignedTo: systemtap@sourceware.org
ReportedBy: fche@redhat.com
Classification: Unclassified
We have encountered cases where the compiler emits assembler operands
for sdt.h parameters that cannot possibly be processed by stap (like
in the case of referring to local labels that are lost during the
compilation/linking stage). The cure for that has been to use
something like -DSTAP_SDT_ARG_CONSTRAINT=r to force values into
registers.
However, we should at least attempt to resolve globals in the symbol
table, within sdt_uprobe_var_expanding_visitor::visit_target_symbol_arg.
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