From: "jistone at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sources.redhat.com
Subject: [Bug translator/11360] New: Bad interaction between -L and @defined
Date: Tue, 09 Mar 2010 02:17:00 -0000 [thread overview]
Message-ID: <20100309021709.11360.jistone@redhat.com> (raw)
$ stap -l syscall.poll
syscall.poll
$ stap -L syscall.poll
semantic error: unable to find local 'timeout' near pc 0xffffffff8112ccab in
sys_poll(fs/select.c) (alternatives: ufds nfds timeout_msecs end_time to ret):
identifier '$timeout' at /usr/local/share/systemtap/tapset/syscalls2.stp:353:57
source: timeout = (@defined($timeout_msecs) ? $timeout_msecs : $timeout)
^
semantic error: unable to find local 'timeout' near pc 0xffffffff8112ccab in
sys_poll(fs/select.c) (alternatives: ufds nfds timeout_msecs end_time to ret):
identifier '$timeout' at :355:48
source: (@defined($timeout_msecs) ? $timeout_msecs : $timeout))
^
semantic error: probe_1906 with unresolved type: identifier 'timeout' at :353:2
source: timeout = (@defined($timeout_msecs) ? $timeout_msecs : $timeout)
^
semantic error: probe_1906 with unresolved type: identifier 'argstr' at :354:2
source: argstr = sprintf("%p, %d, %d", $ufds, $nfds,
^
syscall.poll name:string ufds_uaddr:long nfds:long timeout:unknown
argstr:unknown $ufds:struct pollfd* $nfds:unsigned int $timeout_msecs:long int
[1]
(The [1] is my shell prompt reporting the non-zero exit code)
The problem stems from the option parser:
case 'L':
s.listing_mode_vars = true;
s.unoptimized = true; // This causes retention of variables for listing_mode
Without optimization, expressions like the ternary "@defined(x)?x:y" won't strip
out whichever of x or y is invalid, and the type-resolution phase takes notice.
--
Summary: Bad interaction between -L and @defined
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: translator
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: jistone at redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=11360
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next reply other threads:[~2010-03-09 2:17 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-09 2:17 jistone at redhat dot com [this message]
2010-03-09 2:34 ` [Bug translator/11360] " jistone at redhat dot com
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