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authorMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>2010-10-21 14:13:23 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2010-10-21 21:59:06 +0400
commitcf6eb489e5c04c8f8d5fd7bf90b8346c987688bc (patch)
tree3da471c3ae3f99cdcbec26cc95412a4b44506f3c /tools/perf/util/probe-finder.h
parent632941c4f8fbd5b90dcb1672cd0422dfd7332bc9 (diff)
downloadlinux-cf6eb489e5c04c8f8d5fd7bf90b8346c987688bc.tar.xz
perf probe: Show accessible local variables
Add -V (--vars) option for listing accessible local variables at given probe point. This will help finding which local variables are available for event arguments. e.g.) # perf probe -V call_timer_fn:23 Available variables at call_timer_fn:23 @<run_timer_softirq+345> function_type* fn int preempt_count long unsigned int data struct list_head work_list struct list_head* head struct timer_list* timer struct tvec_base* base 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: <20101021101323.3542.40282.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>
Diffstat (limited to 'tools/perf/util/probe-finder.h')
-rw-r--r--tools/perf/util/probe-finder.h25
1 files changed, 22 insertions, 3 deletions
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
index 4507d519f183..baffd25f39c9 100644
--- a/tools/perf/util/probe-finder.h
+++ b/tools/perf/util/probe-finder.h
@@ -25,17 +25,22 @@ extern int find_probe_trace_events(int fd, struct perf_probe_event *pev,
extern int find_perf_probe_point(int fd, unsigned long addr,
struct perf_probe_point *ppt);
+/* Find a line range */
extern int find_line_range(int fd, struct line_range *lr);
+/* Find available variables */
+extern int find_available_vars_at(int fd, struct perf_probe_event *pev,
+ struct variable_list **vls, int max_points);
+
#include <dwarf.h>
#include <libdw.h>
#include <version.h>
struct probe_finder {
struct perf_probe_event *pev; /* Target probe event */
- struct probe_trace_event *tevs; /* Result trace events */
- int ntevs; /* Number of trace events */
- int max_tevs; /* Max number of trace events */
+
+ /* Callback when a probe point is found */
+ int (*callback)(Dwarf_Die *sp_die, struct probe_finder *pf);
/* For function searching */
int lno; /* Line number */
@@ -53,6 +58,20 @@ struct probe_finder {
struct probe_trace_arg *tvar; /* Current result variable */
};
+struct trace_event_finder {
+ struct probe_finder pf;
+ struct probe_trace_event *tevs; /* Found trace events */
+ int ntevs; /* Number of trace events */
+ int max_tevs; /* Max number of trace events */
+};
+
+struct available_var_finder {
+ struct probe_finder pf;
+ struct variable_list *vls; /* Found variable lists */
+ int nvls; /* Number of variable lists */
+ int max_vls; /* Max no. of variable lists */
+};
+
struct line_finder {
struct line_range *lr; /* Target line range */