forked from Minki/linux
perf probe: Introduce probe_conf global configs
Introduce probe_conf global configuration parameters for probe-event and probe-finder, and removes related parameters from APIs. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Hemant Kumar <hemant@linux.vnet.ibm.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20150508010330.24812.21095.stgit@localhost.localdomain Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Masami Hiramatsu
Arnaldo Carvalho de Melo
parent
442255215c
commit
ddb2f58f9f
@ -50,8 +50,6 @@
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static struct {
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int command; /* Command short_name */
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bool list_events;
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bool force_add;
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bool show_ext_vars;
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bool uprobes;
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bool quiet;
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bool target_used;
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@ -59,7 +57,6 @@ static struct {
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struct perf_probe_event events[MAX_PROBES];
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struct line_range line_range;
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char *target;
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int max_probe_points;
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struct strfilter *filter;
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} params;
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@ -364,7 +361,7 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
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"\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n",
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#endif
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opt_add_probe_event),
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OPT_BOOLEAN('f', "force", ¶ms.force_add, "forcibly add events"
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OPT_BOOLEAN('f', "force", &probe_conf.force_add, "forcibly add events"
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" with existing name"),
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#ifdef HAVE_DWARF_SUPPORT
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OPT_CALLBACK('L', "line", NULL,
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@ -373,7 +370,7 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
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OPT_CALLBACK('V', "vars", NULL,
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"FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT",
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"Show accessible variables on PROBEDEF", opt_show_vars),
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OPT_BOOLEAN('\0', "externs", ¶ms.show_ext_vars,
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OPT_BOOLEAN('\0', "externs", &probe_conf.show_ext_vars,
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"Show external variables too (with --vars only)"),
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OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
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"file", "vmlinux pathname"),
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@ -384,7 +381,7 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
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opt_set_target),
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#endif
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OPT__DRY_RUN(&probe_event_dry_run),
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OPT_INTEGER('\0', "max-probes", ¶ms.max_probe_points,
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OPT_INTEGER('\0', "max-probes", &probe_conf.max_probes,
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"Set how many probe points can be found for a probe."),
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OPT_CALLBACK_DEFAULT('F', "funcs", NULL, "[FILTER]",
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"Show potential probe-able functions.",
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@ -440,8 +437,8 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
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verbose = -1;
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}
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if (params.max_probe_points == 0)
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params.max_probe_points = MAX_PROBES;
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if (probe_conf.max_probes == 0)
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probe_conf.max_probes = MAX_PROBES;
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/*
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* Only consider the user's kernel image path if given.
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@ -477,9 +474,7 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
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NULL);
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ret = show_available_vars(params.events, params.nevents,
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params.max_probe_points,
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params.filter,
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params.show_ext_vars);
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params.filter);
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if (ret < 0)
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pr_err_with_code(" Error: Failed to show vars.", ret);
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return ret;
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@ -498,9 +493,7 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
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usage_with_options(probe_usage, options);
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}
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ret = add_perf_probe_events(params.events, params.nevents,
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params.max_probe_points,
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params.force_add);
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ret = add_perf_probe_events(params.events, params.nevents);
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if (ret < 0) {
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pr_err_with_code(" Error: Failed to add events.", ret);
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return ret;
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@ -51,6 +51,7 @@
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#define PERFPROBE_GROUP "probe"
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bool probe_event_dry_run; /* Dry run flag */
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struct probe_conf probe_conf;
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#define semantic_error(msg ...) pr_err("Semantic error :" msg)
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@ -599,8 +600,7 @@ static int post_process_probe_trace_events(struct probe_trace_event *tevs,
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/* Try to find perf_probe_event with debuginfo */
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static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
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struct probe_trace_event **tevs,
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int max_tevs)
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struct probe_trace_event **tevs)
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{
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bool need_dwarf = perf_probe_event_need_dwarf(pev);
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struct perf_probe_point tmp;
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@ -617,13 +617,12 @@ static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
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pr_debug("Try to find probe point from debuginfo.\n");
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/* Searching trace events corresponding to a probe event */
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ntevs = debuginfo__find_trace_events(dinfo, pev, tevs, max_tevs);
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ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
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if (ntevs == 0) { /* Not found, retry with an alternative */
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ret = get_alternative_probe_event(dinfo, pev, &tmp);
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if (!ret) {
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ntevs = debuginfo__find_trace_events(dinfo, pev,
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tevs, max_tevs);
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ntevs = debuginfo__find_trace_events(dinfo, pev, tevs);
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/*
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* Write back to the original probe_event for
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* setting appropriate (user given) event name
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@ -821,8 +820,7 @@ int show_line_range(struct line_range *lr, const char *module, bool user)
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static int show_available_vars_at(struct debuginfo *dinfo,
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struct perf_probe_event *pev,
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int max_vls, struct strfilter *_filter,
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bool externs)
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struct strfilter *_filter)
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{
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char *buf;
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int ret, i, nvars;
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@ -836,13 +834,12 @@ static int show_available_vars_at(struct debuginfo *dinfo,
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return -EINVAL;
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pr_debug("Searching variables at %s\n", buf);
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ret = debuginfo__find_available_vars_at(dinfo, pev, &vls,
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max_vls, externs);
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ret = debuginfo__find_available_vars_at(dinfo, pev, &vls);
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if (!ret) { /* Not found, retry with an alternative */
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ret = get_alternative_probe_event(dinfo, pev, &tmp);
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if (!ret) {
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ret = debuginfo__find_available_vars_at(dinfo, pev,
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&vls, max_vls, externs);
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&vls);
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/* Release the old probe_point */
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clear_perf_probe_point(&tmp);
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}
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@ -889,7 +886,7 @@ end:
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/* Show available variables on given probe point */
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int show_available_vars(struct perf_probe_event *pevs, int npevs,
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int max_vls, struct strfilter *_filter, bool externs)
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struct strfilter *_filter)
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{
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int i, ret = 0;
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struct debuginfo *dinfo;
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@ -907,8 +904,7 @@ int show_available_vars(struct perf_probe_event *pevs, int npevs,
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setup_pager();
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for (i = 0; i < npevs && ret >= 0; i++)
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ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter,
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externs);
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ret = show_available_vars_at(dinfo, &pevs[i], _filter);
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debuginfo__delete(dinfo);
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out:
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@ -927,8 +923,7 @@ find_perf_probe_point_from_dwarf(struct probe_trace_point *tp __maybe_unused,
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}
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static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
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struct probe_trace_event **tevs __maybe_unused,
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int max_tevs __maybe_unused)
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struct probe_trace_event **tevs __maybe_unused)
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{
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if (perf_probe_event_need_dwarf(pev)) {
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pr_warning("Debuginfo-analysis is not supported.\n");
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@ -947,9 +942,8 @@ int show_line_range(struct line_range *lr __maybe_unused,
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}
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int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
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int npevs __maybe_unused, int max_vls __maybe_unused,
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struct strfilter *filter __maybe_unused,
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bool externs __maybe_unused)
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int npevs __maybe_unused,
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struct strfilter *filter __maybe_unused)
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{
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pr_warning("Debuginfo-analysis is not supported.\n");
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return -ENOSYS;
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@ -2514,8 +2508,7 @@ void __weak arch__fix_tev_from_maps(struct perf_probe_event *pev __maybe_unused,
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* Return an error or the number of found probe_trace_event
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*/
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static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
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struct probe_trace_event **tevs,
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int max_tevs)
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struct probe_trace_event **tevs)
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{
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struct map *map = NULL;
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struct ref_reloc_sym *reloc_sym = NULL;
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@ -2542,7 +2535,7 @@ static int find_probe_trace_events_from_map(struct perf_probe_event *pev,
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pev->target ? : "kernel");
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ret = -ENOENT;
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goto out;
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} else if (num_matched_functions > max_tevs) {
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} else if (num_matched_functions > probe_conf.max_probes) {
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pr_err("Too many functions matched in %s\n",
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pev->target ? : "kernel");
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ret = -E2BIG;
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@ -2634,8 +2627,7 @@ err_out:
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bool __weak arch__prefers_symtab(void) { return false; }
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static int convert_to_probe_trace_events(struct perf_probe_event *pev,
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struct probe_trace_event **tevs,
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int max_tevs)
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struct probe_trace_event **tevs)
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{
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int ret;
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@ -2649,17 +2641,17 @@ static int convert_to_probe_trace_events(struct perf_probe_event *pev,
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}
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if (arch__prefers_symtab() && !perf_probe_event_need_dwarf(pev)) {
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ret = find_probe_trace_events_from_map(pev, tevs, max_tevs);
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ret = find_probe_trace_events_from_map(pev, tevs);
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if (ret > 0)
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return ret; /* Found in symbol table */
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}
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/* Convert perf_probe_event with debuginfo */
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ret = try_to_find_probe_trace_events(pev, tevs, max_tevs);
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ret = try_to_find_probe_trace_events(pev, tevs);
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if (ret != 0)
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return ret; /* Found in debuginfo or got an error */
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return find_probe_trace_events_from_map(pev, tevs, max_tevs);
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return find_probe_trace_events_from_map(pev, tevs);
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}
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struct __event_package {
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@ -2668,8 +2660,7 @@ struct __event_package {
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int ntevs;
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};
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int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
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int max_tevs, bool force_add)
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int add_perf_probe_events(struct perf_probe_event *pevs, int npevs)
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{
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int i, j, ret;
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struct __event_package *pkgs;
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@ -2691,8 +2682,7 @@ int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
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pkgs[i].pev = &pevs[i];
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/* Convert with or without debuginfo */
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ret = convert_to_probe_trace_events(pkgs[i].pev,
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&pkgs[i].tevs,
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max_tevs);
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&pkgs[i].tevs);
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if (ret < 0)
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goto end;
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pkgs[i].ntevs = ret;
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@ -2701,7 +2691,8 @@ int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
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/* Loop 2: add all events */
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for (i = 0; i < npevs; i++) {
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ret = __add_probe_trace_events(pkgs[i].pev, pkgs[i].tevs,
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pkgs[i].ntevs, force_add);
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pkgs[i].ntevs,
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probe_conf.force_add);
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if (ret < 0)
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break;
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}
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@ -6,6 +6,13 @@
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#include "strlist.h"
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#include "strfilter.h"
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/* Probe related configurations */
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struct probe_conf {
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bool show_ext_vars;
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bool force_add;
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int max_probes;
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};
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extern struct probe_conf probe_conf;
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extern bool probe_event_dry_run;
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/* kprobe-tracer and uprobe-tracer tracing point */
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@ -124,15 +131,13 @@ extern int line_range__init(struct line_range *lr);
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/* Internal use: Return kernel/module path */
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extern const char *kernel_get_module_path(const char *module);
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extern int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
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int max_probe_points, bool force_add);
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extern int add_perf_probe_events(struct perf_probe_event *pevs, int npevs);
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extern int del_perf_probe_events(struct strfilter *filter);
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extern int show_perf_probe_events(struct strfilter *filter);
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extern int show_line_range(struct line_range *lr, const char *module,
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bool user);
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extern int show_available_vars(struct perf_probe_event *pevs, int npevs,
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int max_probe_points, struct strfilter *filter,
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bool externs);
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struct strfilter *filter);
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extern int show_available_funcs(const char *module, struct strfilter *filter,
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bool user);
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bool arch__prefers_symtab(void);
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@ -1214,15 +1214,15 @@ end:
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/* Find probe_trace_events specified by perf_probe_event from debuginfo */
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int debuginfo__find_trace_events(struct debuginfo *dbg,
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struct perf_probe_event *pev,
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struct probe_trace_event **tevs, int max_tevs)
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struct probe_trace_event **tevs)
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{
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struct trace_event_finder tf = {
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.pf = {.pev = pev, .callback = add_probe_trace_event},
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.mod = dbg->mod, .max_tevs = max_tevs};
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.max_tevs = probe_conf.max_probes, .mod = dbg->mod};
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int ret;
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/* Allocate result tevs array */
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*tevs = zalloc(sizeof(struct probe_trace_event) * max_tevs);
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*tevs = zalloc(sizeof(struct probe_trace_event) * tf.max_tevs);
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if (*tevs == NULL)
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return -ENOMEM;
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@ -1303,9 +1303,9 @@ static int add_available_vars(Dwarf_Die *sc_die, struct probe_finder *pf)
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die_find_child(sc_die, collect_variables_cb, (void *)af, &die_mem);
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/* Find external variables */
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if (!af->externs)
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if (!probe_conf.show_ext_vars)
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goto out;
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/* Don't need to search child DIE for externs. */
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/* Don't need to search child DIE for external vars. */
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af->child = false;
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die_find_child(&pf->cu_die, collect_variables_cb, (void *)af, &die_mem);
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@ -1325,17 +1325,16 @@ out:
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*/
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int debuginfo__find_available_vars_at(struct debuginfo *dbg,
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struct perf_probe_event *pev,
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struct variable_list **vls,
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int max_vls, bool externs)
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struct variable_list **vls)
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{
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struct available_var_finder af = {
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.pf = {.pev = pev, .callback = add_available_vars},
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.mod = dbg->mod,
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.max_vls = max_vls, .externs = externs};
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.max_vls = probe_conf.max_probes};
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int ret;
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/* Allocate result vls array */
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*vls = zalloc(sizeof(struct variable_list) * max_vls);
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*vls = zalloc(sizeof(struct variable_list) * af.max_vls);
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if (*vls == NULL)
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return -ENOMEM;
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@ -40,8 +40,7 @@ extern void debuginfo__delete(struct debuginfo *dbg);
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/* Find probe_trace_events specified by perf_probe_event from debuginfo */
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extern int debuginfo__find_trace_events(struct debuginfo *dbg,
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struct perf_probe_event *pev,
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struct probe_trace_event **tevs,
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int max_tevs);
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struct probe_trace_event **tevs);
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/* Find a perf_probe_point from debuginfo */
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extern int debuginfo__find_probe_point(struct debuginfo *dbg,
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@ -55,8 +54,7 @@ extern int debuginfo__find_line_range(struct debuginfo *dbg,
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/* Find available variables */
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extern int debuginfo__find_available_vars_at(struct debuginfo *dbg,
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struct perf_probe_event *pev,
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struct variable_list **vls,
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int max_points, bool externs);
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struct variable_list **vls);
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/* Find a src file from a DWARF tag path */
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int get_real_path(const char *raw_path, const char *comp_dir,
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@ -99,7 +97,6 @@ struct available_var_finder {
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struct variable_list *vls; /* Found variable lists */
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int nvls; /* Number of variable lists */
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int max_vls; /* Max no. of variable lists */
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bool externs; /* Find external vars too */
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bool child; /* Search child scopes */
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};
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