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| author | Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> | 2010-10-21 14:13:23 +0400 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-10-21 21:59:06 +0400 |
| commit | cf6eb489e5c04c8f8d5fd7bf90b8346c987688bc (patch) | |
| tree | 3da471c3ae3f99cdcbec26cc95412a4b44506f3c /tools/perf/util/probe-finder.h | |
| parent | 632941c4f8fbd5b90dcb1672cd0422dfd7332bc9 (diff) | |
| download | linux-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.h | 25 |
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 */ |