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[Bug translator/24327] @defined unable to handle $$parms and $$vars meta variables
- From: "wcohen at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Wed, 13 Mar 2019 21:06:11 +0000
- Subject: [Bug translator/24327] @defined unable to handle $$parms and $$vars meta variables
- Auto-submitted: auto-generated
- References: <bug-24327-6586@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=24327
William Cohen <wcohen at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #3 from William Cohen <wcohen at redhat dot com> ---
The following patch checked into upstream systemtap fixes the problem.
commit 76517421a569be2d7cd90302f15b63d5cfb0bc75 (HEAD -> master, origin/master,
origin/HEAD)
Author: Jafeer Uddin <juddin@redhat.com>
Date: Wed Mar 13 16:12:45 2019 -0400
PR24327: Remove printing of unused synthetic globals
The handling of DW_OP_GNU_entry_value introduces synthetic
global variables that after optimizations may end up not
being used. The default behaviour is to print out the values
of unsued globals in user scripts. This printing is intended
for user defined globals and shouldn't occur with the generated
globals.
The reproducer works fine now:
$ ../install/bin/stap -e 'probe kernel.statement("do_sys_open@fs/open.c:*")
{if (@defined($$parms)) printf("%s \n", $$parms); exit()}'
dfd=0xffffffffffffff9c filename=0x7ffd2e4c4590 flags=0x98800 mode=0x0
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