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[Bug translator/16607] New: add .callsite probes using DWARF5's DW_TAG_call_site
- From: "jlebon at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Wed, 19 Feb 2014 16:33:31 +0000
- Subject: [Bug translator/16607] New: add .callsite probes using DWARF5's DW_TAG_call_site
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=16607
Bug ID: 16607
Summary: add .callsite probes using DWARF5's DW_TAG_call_site
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: translator
Assignee: systemtap at sourceware dot org
Reporter: jlebon at redhat dot com
The DWARF Issue 100909.2 (see [1]) details a new DWARF tag called
DW_TAG_call_site. Parts of the issue have already been implemented by GCC
(under the name DW_TAG_GNU_call_site), which has been used to implement
.callees probes (see bug 1133).
If the Issue is accepted into DWARF5, we can expect GCC to implement all
attributes, allowing us to provide call site probing using the
DW_AT_call_site_pc attribute.
The new attributes will also allow us to give users guarantees regarding the
completeness of callee/callsite sets found statically (using the DW_AT_all_*
attributes).
[1] http://www.dwarfstd.org/ShowIssue.php?issue=100909.2
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