forked from Minki/linux
631c9def80
Add --line option to support showing probable source-code lines.
perf probe --line SRC:LN[-LN|+NUM]
or
perf probe --line FUNC[:LN[-LN|+NUM]]
This option shows source-code with line number if the line can
be probed. Lines without line number (and blue color) means that
the line can not be probed, because debuginfo doesn't have the
information of those lines.
The argument specifies the range of lines, "source.c:100-120"
shows lines between 100th to l20th in source.c file. And
"func:10+20" shows 20 lines from 10th line of func function.
e.g.
# ./perf probe --line kernel/sched.c:1080
<kernel/sched.c:1080>
*
* called with rq->lock held and irqs disabled
*/
static void hrtick_start(struct rq *rq, u64 delay)
{
struct hrtimer *timer = &rq->hrtick_timer;
1086 ktime_t time = ktime_add_ns(timer->base->get_time(), delay);
hrtimer_set_expires(timer, time);
1090 if (rq == this_rq()) {
1091 hrtimer_restart(timer);
1092 } else if (!rq->hrtick_csd_pending) {
1093 __smp_call_function_single(cpu_of(rq), &rq->hrtick_csd,
1094 rq->hrtick_csd_pending = 1;
If you specifying function name, this shows function-relative
line number.
# ./perf probe --line schedule
<schedule:0>
asmlinkage void __sched schedule(void)
1 {
struct task_struct *prev, *next;
unsigned long *switch_count;
struct rq *rq;
int cpu;
need_resched:
preempt_disable();
9 cpu = smp_processor_id();
10 rq = cpu_rq(cpu);
11 rcu_sched_qs(cpu);
12 prev = rq->curr;
13 switch_count = &prev->nivcsw;
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
LKML-Reference: <20100106144534.27218.77939.stgit@dhcp-100-2-132.bos.redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
25 lines
933 B
C
25 lines
933 B
C
#ifndef _PROBE_EVENT_H
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#define _PROBE_EVENT_H
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#include <stdbool.h>
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#include "probe-finder.h"
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#include "strlist.h"
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extern void parse_line_range_desc(const char *arg, struct line_range *lr);
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extern void parse_perf_probe_event(const char *str, struct probe_point *pp,
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bool *need_dwarf);
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extern int synthesize_perf_probe_point(struct probe_point *pp);
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extern int synthesize_perf_probe_event(struct probe_point *pp);
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extern void parse_trace_kprobe_event(const char *str, struct probe_point *pp);
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extern int synthesize_trace_kprobe_event(struct probe_point *pp);
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extern void add_trace_kprobe_events(struct probe_point *probes, int nr_probes,
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bool force_add);
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extern void del_trace_kprobe_events(struct strlist *dellist);
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extern void show_perf_probe_events(void);
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extern void show_line_range(struct line_range *lr);
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/* Maximum index number of event-name postfix */
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#define MAX_EVENT_INDEX 1024
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#endif /*_PROBE_EVENT_H */
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