* [Bug tapsets/13451] New: tapset/nd_syscalls.stp:# FIXME: doesn't handle dup3
@ 2011-11-29 19:18 mjw at redhat dot com
2011-11-30 16:53 ` [Bug tapsets/13451] " dsmith at redhat dot com
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: mjw at redhat dot com @ 2011-11-29 19:18 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13451
Bug #: 13451
Summary: tapset/nd_syscalls.stp:# FIXME: doesn't handle dup3
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: tapsets
AssignedTo: systemtap@sourceware.org
ReportedBy: mjw@redhat.com
Classification: Unclassified
The corresponding tapset/syscalls.stp says:
# dup3 (handles both dup2 and dup3 except for corner case)___________
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* [Bug tapsets/13451] tapset/nd_syscalls.stp:# FIXME: doesn't handle dup3
2011-11-29 19:18 [Bug tapsets/13451] New: tapset/nd_syscalls.stp:# FIXME: doesn't handle dup3 mjw at redhat dot com
@ 2011-11-30 16:53 ` dsmith at redhat dot com
2012-07-18 18:34 ` dsmith at redhat dot com
2012-07-20 18:59 ` dsmith at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: dsmith at redhat dot com @ 2011-11-30 16:53 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13451
David Smith <dsmith at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dsmith at redhat dot com
Depends on| |11424
--- Comment #1 from David Smith <dsmith at redhat dot com> 2011-11-30 16:36:12 UTC ---
Here's a bit more from tapset/syscalls.stp:
----
# dup3 (handles both dup2 and dup3 except for corner case)___________
# long sys_dup2(unsigned int oldfd, unsigned int newfd)
# SYSCALL_DEFINE3(dup3, unsigned int, oldfd, unsigned int, newfd, int, flags)
probe syscall.dup2 = kernel.function("sys_dup3").call !,
kernel.function("sys_dup2").call
----
The reason why it is done this way is that in the kernel sys_dup2 sets a few
things up then calls sys_dup3. This way we ignore the sys_dup2 call, and only
catch the sys_dup3 call.
Unfortunately, as bug #11424 notes, '!' (optional and sufficient) doesn't work
for kprobe.function probes. So, the above logic will be difficult to duplicate
in tapset/nd_syscalls.stp.
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* [Bug tapsets/13451] tapset/nd_syscalls.stp:# FIXME: doesn't handle dup3
2011-11-29 19:18 [Bug tapsets/13451] New: tapset/nd_syscalls.stp:# FIXME: doesn't handle dup3 mjw at redhat dot com
2011-11-30 16:53 ` [Bug tapsets/13451] " dsmith at redhat dot com
@ 2012-07-18 18:34 ` dsmith at redhat dot com
2012-07-20 18:59 ` dsmith at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: dsmith at redhat dot com @ 2012-07-18 18:34 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13451
Bug 13451 depends on bug 11424, which changed state.
Bug 11424 Summary: dwarfless kprobe.* probes don't validate at translate time
http://sourceware.org/bugzilla/show_bug.cgi?id=11424
What |Old Value |New Value
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
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* [Bug tapsets/13451] tapset/nd_syscalls.stp:# FIXME: doesn't handle dup3
2011-11-29 19:18 [Bug tapsets/13451] New: tapset/nd_syscalls.stp:# FIXME: doesn't handle dup3 mjw at redhat dot com
2011-11-30 16:53 ` [Bug tapsets/13451] " dsmith at redhat dot com
2012-07-18 18:34 ` dsmith at redhat dot com
@ 2012-07-20 18:59 ` dsmith at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: dsmith at redhat dot com @ 2012-07-20 18:59 UTC (permalink / raw)
To: systemtap
http://sourceware.org/bugzilla/show_bug.cgi?id=13451
David Smith <dsmith at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #2 from David Smith <dsmith at redhat dot com> 2012-07-20 18:58:55 UTC ---
Now that bug #11424 and bug #14378 are fixed, this bug can be addressed.
Fixed in commit bbd3b1b.
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2011-11-29 19:18 [Bug tapsets/13451] New: tapset/nd_syscalls.stp:# FIXME: doesn't handle dup3 mjw at redhat dot com
2011-11-30 16:53 ` [Bug tapsets/13451] " dsmith at redhat dot com
2012-07-18 18:34 ` dsmith at redhat dot com
2012-07-20 18:59 ` dsmith at redhat dot com
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