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perf probe: Show accessible global variables

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Add --externs for allowing --vars to show accessible global (externally
defined) variables from a given probe point too.

This will give you a hint which globals can be accessible from the probe point.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <20101021101335.3542.31003.stgit@ltc236.sdl.hitachi.co.jp>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Masami Hiramatsu 2010-10-21 19:13:35 +09:00 • committed by Arnaldo Carvalho de Melo
parent c82ec0a2bd
commit fb8c5a56c7
6 changed files with 41 additions and 14 deletions
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8
tools/perf/builtin-probe.c
View file

@ -51,6 +51,7 @@ static struct {
bool force_add;
bool show_lines;
bool show_vars;
bool show_ext_vars;
bool mod_events;
int nevents;
struct perf_probe_event events[MAX_PROBES];
@ -162,7 +163,7 @@ static const char * const probe_usage[] = {
"perf probe --list",
#ifdef DWARF_SUPPORT
"perf probe --line 'LINEDESC'",
"perf probe --vars 'PROBEPOINT'",
"perf probe [--externs] --vars 'PROBEPOINT'",
#endif
NULL
};
@ -207,6 +208,8 @@ static const struct option options[] = {
OPT_CALLBACK('V', "vars", NULL,
"FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT",
"Show accessible variables on PROBEDEF", opt_show_vars),
OPT_BOOLEAN('\0', "externs", &params.show_ext_vars,
"Show external variables too (with --vars only)"),
OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
"file", "vmlinux pathname"),
OPT_STRING('s', "source", &symbol_conf.source_prefix,
@ -287,7 +290,8 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
usage_with_options(probe_usage, options);
}
ret = show_available_vars(params.events, params.nevents,
params.max_probe_points);
params.max_probe_points,
params.show_ext_vars);
if (ret < 0)
pr_err(" Error: Failed to show vars. (%d)\n", ret);
return ret;