* [Bug runtime/6436] New: unwinder/backtrace should see through kretprobes_trampolines
@ 2008-04-21 15:44 fche at redhat dot com
2008-04-21 17:48 ` [Bug runtime/6436] " mhiramat at redhat dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: fche at redhat dot com @ 2008-04-21 15:44 UTC (permalink / raw)
To: systemtap
*** Bug 6437 has been marked as a duplicate of this bug. ***
--
Summary: unwinder/backtrace should see through
kretprobes_trampolines
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: runtime
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: fche at redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=6436
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* [Bug runtime/6436] unwinder/backtrace should see through kretprobes_trampolines
2008-04-21 15:44 [Bug runtime/6436] New: unwinder/backtrace should see through kretprobes_trampolines fche at redhat dot com
@ 2008-04-21 17:48 ` mhiramat at redhat dot com
2008-04-21 20:15 ` fche at redhat dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: mhiramat at redhat dot com @ 2008-04-21 17:48 UTC (permalink / raw)
To: systemtap
------- Additional Comments From mhiramat at redhat dot com 2008-04-21 16:26 -------
I think this request needs kernel-side support, because the original return
address has been removed from a stack. We can find it in
kretprobe_instance->ret_addr.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6436
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* [Bug runtime/6436] unwinder/backtrace should see through kretprobes_trampolines
2008-04-21 15:44 [Bug runtime/6436] New: unwinder/backtrace should see through kretprobes_trampolines fche at redhat dot com
2008-04-21 17:48 ` [Bug runtime/6436] " mhiramat at redhat dot com
@ 2008-04-21 20:15 ` fche at redhat dot com
2008-04-22 1:05 ` mhiramat at redhat dot com
2009-04-23 16:12 ` mjw at redhat dot com
3 siblings, 0 replies; 5+ messages in thread
From: fche at redhat dot com @ 2008-04-21 20:15 UTC (permalink / raw)
To: systemtap
------- Additional Comments From fche at redhat dot com 2008-04-21 17:47 -------
It may be enough to MODULE_EXPORT the kretprobe_inst_table_head() function.
Then our unwinder could search the list of currently active kretprobe_instances.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6436
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* [Bug runtime/6436] unwinder/backtrace should see through kretprobes_trampolines
2008-04-21 15:44 [Bug runtime/6436] New: unwinder/backtrace should see through kretprobes_trampolines fche at redhat dot com
2008-04-21 17:48 ` [Bug runtime/6436] " mhiramat at redhat dot com
2008-04-21 20:15 ` fche at redhat dot com
@ 2008-04-22 1:05 ` mhiramat at redhat dot com
2009-04-23 16:12 ` mjw at redhat dot com
3 siblings, 0 replies; 5+ messages in thread
From: mhiramat at redhat dot com @ 2008-04-22 1:05 UTC (permalink / raw)
To: systemtap
------- Additional Comments From mhiramat at redhat dot com 2008-04-21 20:59 -------
(In reply to comment #2)
> It may be enough to MODULE_EXPORT the kretprobe_inst_table_head() function.
Take care: you have to hold the kretprobe_lock while accessing the instance
table:-).
# and the lock is held when a kretprobe handler is called. :-(
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6436
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* [Bug runtime/6436] unwinder/backtrace should see through kretprobes_trampolines
2008-04-21 15:44 [Bug runtime/6436] New: unwinder/backtrace should see through kretprobes_trampolines fche at redhat dot com
` (2 preceding siblings ...)
2008-04-22 1:05 ` mhiramat at redhat dot com
@ 2009-04-23 16:12 ` mjw at redhat dot com
3 siblings, 0 replies; 5+ messages in thread
From: mjw at redhat dot com @ 2009-04-23 16:12 UTC (permalink / raw)
To: systemtap
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |mjw at redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=6436
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end of thread, other threads:[~2009-04-23 16:12 UTC | newest]
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2008-04-21 15:44 [Bug runtime/6436] New: unwinder/backtrace should see through kretprobes_trampolines fche at redhat dot com
2008-04-21 17:48 ` [Bug runtime/6436] " mhiramat at redhat dot com
2008-04-21 20:15 ` fche at redhat dot com
2008-04-22 1:05 ` mhiramat at redhat dot com
2009-04-23 16:12 ` mjw at redhat dot com
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