From 469b9b88488e89114bb3e9ac5ee7906b7b96123f Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Thu, 21 Oct 2010 19:13:41 +0900 Subject: perf probe: Add basic module support Add basic module probe support on perf probe. This introduces "--module " option to perf probe for putting probes and showing lines and variables in the given module. Currently, this supports only probing on running modules. Supporting off-line module probing is the next step. e.g.) [show lines] # ./perf probe --module drm -L drm_vblank_info 0 int drm_vblank_info(struct seq_file *m, void *data) 1 { struct drm_info_node *node = (struct drm_info_node *) m->private 3 struct drm_device *dev = node->minor->dev; ... [show vars] # ./perf probe --module drm -V drm_vblank_info:3 Available variables at drm_vblank_info:3 @ (unknown_type) data struct drm_info_node* node struct seq_file* m [put a probe] # ./perf probe --module drm drm_vblank_info:3 node m Add new event: probe:drm_vblank_info (on drm_vblank_info:3 with node m) You can now use it on all perf tools, such as: perf record -e probe:drm_vblank_info -aR sleep 1 [list probes] # ./perf probe -l probe:drm_vblank_info (on drm_vblank_info:3@drivers/gpu/drm/drm_info.c with ... Cc: Peter Zijlstra Cc: Paul Mackerras Cc: Ingo Molnar Cc: Frederic Weisbecker LKML-Reference: <20101021101341.3542.71638.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Masami Hiramatsu Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-probe.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'tools/perf/builtin-probe.c') diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index bdf60cfdf70f..2e000c068cc5 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -57,6 +57,7 @@ static struct { struct perf_probe_event events[MAX_PROBES]; struct strlist *dellist; struct line_range line_range; + const char *target_module; int max_probe_points; } params; @@ -162,8 +163,8 @@ static const char * const probe_usage[] = { "perf probe [] --del '[GROUP:]EVENT' ...", "perf probe --list", #ifdef DWARF_SUPPORT - "perf probe --line 'LINEDESC'", - "perf probe [--externs] --vars 'PROBEPOINT'", + "perf probe [] --line 'LINEDESC'", + "perf probe [] --vars 'PROBEPOINT'", #endif NULL }; @@ -214,6 +215,8 @@ static const struct option options[] = { "file", "vmlinux pathname"), OPT_STRING('s', "source", &symbol_conf.source_prefix, "directory", "path to kernel source"), + OPT_STRING('m', "module", ¶ms.target_module, + "modname", "target module name"), #endif OPT__DRY_RUN(&probe_event_dry_run), OPT_INTEGER('\0', "max-probes", ¶ms.max_probe_points, @@ -278,7 +281,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) usage_with_options(probe_usage, options); } - ret = show_line_range(¶ms.line_range); + ret = show_line_range(¶ms.line_range, params.target_module); if (ret < 0) pr_err(" Error: Failed to show lines. (%d)\n", ret); return ret; @@ -291,6 +294,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) } ret = show_available_vars(params.events, params.nevents, params.max_probe_points, + params.target_module, params.show_ext_vars); if (ret < 0) pr_err(" Error: Failed to show vars. (%d)\n", ret); @@ -310,6 +314,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) if (params.nevents) { ret = add_perf_probe_events(params.events, params.nevents, params.max_probe_points, + params.target_module, params.force_add); if (ret < 0) { pr_err(" Error: Failed to add events. (%d)\n", ret); -- cgit v1.2.3