[Bug tapsets/4510] probe scheduler.ctxswitch looks for wrong arg ($new) on 2.6.9-55.ELsmp x86_64

["wcohen at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

------- Additional Comments From wcohen at redhat dot com  2007-05-15 22:51 -------
The 2.6.9-55.ELxmp x86_64 has the following function in kernel/sched.c

static inline
task_t * context_switch(runqueue_t *rq, task_t *prev, task_t *next)
{
...

However it the probe scheduler.ctxswitch is looking for $new rather than $next.
The following example illustrates the problem on the machine:

probe scheduler.ctxswitch
{
	printf("next_pid = %d\n", next_pid)
}

$ ../../install/bin/stap -v  /tmp/schedx.stpPass 1: parsed user script and 54
library script(s) in 750usr/10sys/767real ms.
semantic error: unable to find local 'new' near pc 0xffffffff8030ba14
(alternatives: rq prev next): identifier '$new' at
/home/wcohen/stap_snap_200705142049/install/share/systemtap/tapset/scheduler.stp:138:21
Pass 2: analyzed script: 1 probe(s), 0 function(s), 0 embed(s), 0 global(s) in
220usr/60sys/275real ms.
Pass 2: analysis failed.  Try again with more '-v' (verbose) options.







-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|probe scheduler.ctxswitch   |probe scheduler.ctxswitch
                   |looks for wrong arg on      |looks for wrong arg ($new)
                   |2.6.9-55.ELsmp x86_64       |on  2.6.9-55.ELsmp x86_64


http://sourceware.org/bugzilla/show_bug.cgi?id=4510

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