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[Bug dyninst/15136] New: stapdyn doesn't fill registers on 32-bit x86
- From: "jistone at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Mon, 11 Feb 2013 21:11:01 +0000
- Subject: [Bug dyninst/15136] New: stapdyn doesn't fill registers on 32-bit x86
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=15136
Bug #: 15136
Summary: stapdyn doesn't fill registers on 32-bit x86
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: dyninst
AssignedTo: systemtap@sourceware.org
ReportedBy: jistone@redhat.com
Classification: Unclassified
On 32-bit x86, Dyninst currently doesn't make any registers available to
instrumentation snippets. Our code fills what it can (nothing) and writes
zeros for the rest. Thus, any code in the probe handlers which read registers
will get incorrect data, and probably error out if they try to read and
dereference a pointer.
Our code is dynamic about available registers, so once Dyninst expands its
support, stapdyn should just start working too. Thus, this bug is just for
tracking purposes, and to remind us to try again later.
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