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Date: Sat, 9 May 2015 14:30:52 +0800
From: He Kuang <hekuang@...wei.com>
To: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
<a.p.zijlstra@...llo.nl>, <acme@...nel.org>, <jolsa@...nel.org>,
<mingo@...hat.com>
CC: <wangnan0@...wei.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] perf probe: Add flag for options when showing variables
hi, Masami
On 2015/5/8 21:15, Masami Hiramatsu wrote:
> On 2015/05/08 21:23, He Kuang wrote:
>> Change current boolean flag 'externs' to unsigned long 'var_flags' for
>> more options related to variables. These options work with --vars only.
> NAK, please check my latest patch.
>
> https://lkml.org/lkml/2015/5/7/1024
>
> If you need to add some configurations, please considering to add something
> on probe_conf to pass.
>
> Thanks,
Ok, I'll use probe_conf for new options.
>> Signed-off-by: He Kuang <hekuang@...wei.com>
>> ---
>> tools/perf/builtin-probe.c | 8 +++++++-
>> tools/perf/util/probe-event.c | 12 ++++++------
>> tools/perf/util/probe-event.h | 3 ++-
>> tools/perf/util/probe-finder.c | 6 +++---
>> tools/perf/util/probe-finder.h | 9 +++++++--
>> 5 files changed, 25 insertions(+), 13 deletions(-)
>>
>> diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
>> index 9c4cf5e..19ebe93 100644
>> --- a/tools/perf/builtin-probe.c
>> +++ b/tools/perf/builtin-probe.c
>> @@ -472,18 +472,24 @@ __cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
>> pr_err_with_code(" Error: Failed to show lines.", ret);
>> return ret;
>> case 'V':
>> + {
>> + unsigned long var_flags;
>> +
>> if (!params.filter)
>> params.filter = strfilter__new(DEFAULT_VAR_FILTER,
>> NULL);
>>
>> + var_flags = params.show_ext_vars << VAR_FLAGS_EXTERN;
>> +
>> ret = show_available_vars(params.events, params.nevents,
>> params.max_probe_points,
>> params.target,
>> params.filter,
>> - params.show_ext_vars);
>> + var_flags);
>> if (ret < 0)
>> pr_err_with_code(" Error: Failed to show vars.", ret);
>> return ret;
>> + }
>> #endif
>> case 'd':
>> ret = del_perf_probe_events(params.filter);
>> diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
>> index 37a3a8b..4859656 100644
>> --- a/tools/perf/util/probe-event.c
>> +++ b/tools/perf/util/probe-event.c
>> @@ -824,7 +824,7 @@ int show_line_range(struct line_range *lr, const char *module, bool user)
>> static int show_available_vars_at(struct debuginfo *dinfo,
>> struct perf_probe_event *pev,
>> int max_vls, struct strfilter *_filter,
>> - bool externs, const char *target)
>> + unsigned long var_flags, const char *target)
>> {
>> char *buf;
>> int ret, i, nvars;
>> @@ -839,12 +839,12 @@ static int show_available_vars_at(struct debuginfo *dinfo,
>> pr_debug("Searching variables at %s\n", buf);
>>
>> ret = debuginfo__find_available_vars_at(dinfo, pev, &vls,
>> - max_vls, externs);
>> + max_vls, var_flags);
>> if (!ret) { /* Not found, retry with an alternative */
>> ret = get_alternative_probe_event(dinfo, pev, &tmp, target);
>> if (!ret) {
>> ret = debuginfo__find_available_vars_at(dinfo, pev,
>> - &vls, max_vls, externs);
>> + &vls, max_vls, var_flags);
>> /* Release the old probe_point */
>> clear_perf_probe_point(&tmp);
>> }
>> @@ -892,7 +892,7 @@ end:
>> /* Show available variables on given probe point */
>> int show_available_vars(struct perf_probe_event *pevs, int npevs,
>> int max_vls, const char *module,
>> - struct strfilter *_filter, bool externs)
>> + struct strfilter *_filter, unsigned long var_flags)
>> {
>> int i, ret = 0;
>> struct debuginfo *dinfo;
>> @@ -911,7 +911,7 @@ int show_available_vars(struct perf_probe_event *pevs, int npevs,
>>
>> for (i = 0; i < npevs && ret >= 0; i++)
>> ret = show_available_vars_at(dinfo, &pevs[i], max_vls, _filter,
>> - externs, module);
>> + var_flags, module);
>>
>> debuginfo__delete(dinfo);
>> out:
>> @@ -954,7 +954,7 @@ int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
>> int npevs __maybe_unused, int max_vls __maybe_unused,
>> const char *module __maybe_unused,
>> struct strfilter *filter __maybe_unused,
>> - bool externs __maybe_unused)
>> + unsigned long var_flags __maybe_unused)
>> {
>> pr_warning("Debuginfo-analysis is not supported.\n");
>> return -ENOSYS;
>> diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h
>> index e10aedc..637b59e 100644
>> --- a/tools/perf/util/probe-event.h
>> +++ b/tools/perf/util/probe-event.h
>> @@ -132,7 +132,8 @@ extern int show_line_range(struct line_range *lr, const char *module,
>> bool user);
>> extern int show_available_vars(struct perf_probe_event *pevs, int npevs,
>> int max_probe_points, const char *module,
>> - struct strfilter *filter, bool externs);
>> + struct strfilter *filter,
>> + unsigned long var_flags);
>> extern int show_available_funcs(const char *module, struct strfilter *filter,
>> bool user);
>> bool arch__prefers_symtab(void);
>> diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
>> index 7b645ff40..6bbdf3f 100644
>> --- a/tools/perf/util/probe-finder.c
>> +++ b/tools/perf/util/probe-finder.c
>> @@ -1305,7 +1305,7 @@ static int add_available_vars(Dwarf_Die *sc_die, struct probe_finder *pf)
>> die_find_child(sc_die, collect_variables_cb, (void *)af, &die_mem);
>>
>> /* Find external variables */
>> - if (!af->externs)
>> + if (!test_bit(VAR_FLAGS_EXTERN, &af->var_flags))
>> goto out;
>> /* Don't need to search child DIE for externs. */
>> af->child = false;
>> @@ -1328,12 +1328,12 @@ out:
>> int debuginfo__find_available_vars_at(struct debuginfo *dbg,
>> struct perf_probe_event *pev,
>> struct variable_list **vls,
>> - int max_vls, bool externs)
>> + int max_vls, unsigned long var_flags)
>> {
>> struct available_var_finder af = {
>> .pf = {.pev = pev, .callback = add_available_vars},
>> .mod = dbg->mod,
>> - .max_vls = max_vls, .externs = externs};
>> + .max_vls = max_vls, .var_flags = var_flags};
>> int ret;
>>
>> /* Allocate result vls array */
>> diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
>> index f53553d..95bb79d 100644
>> --- a/tools/perf/util/probe-finder.h
>> +++ b/tools/perf/util/probe-finder.h
>> @@ -10,6 +10,10 @@
>> #define MAX_PROBES 128
>> #define MAX_PROBE_ARGS 128
>>
>> +enum var_flags_bits {
>> + VAR_FLAGS_EXTERN
>> +};
>> +
>> #define PROBE_ARG_VARS "$vars"
>> #define PROBE_ARG_PARAMS "$params"
>>
>> @@ -56,7 +60,8 @@ extern int debuginfo__find_line_range(struct debuginfo *dbg,
>> extern int debuginfo__find_available_vars_at(struct debuginfo *dbg,
>> struct perf_probe_event *pev,
>> struct variable_list **vls,
>> - int max_points, bool externs);
>> + int max_points,
>> + unsigned long var_flags);
>>
>> /* Find a src file from a DWARF tag path */
>> int get_real_path(const char *raw_path, const char *comp_dir,
>> @@ -99,7 +104,7 @@ struct available_var_finder {
>> struct variable_list *vls; /* Found variable lists */
>> int nvls; /* Number of variable lists */
>> int max_vls; /* Max no. of variable lists */
>> - bool externs; /* Find external vars too */
>> + unsigned long var_flags; /* Variable flags */
>> bool child; /* Search child scopes */
>> };
>>
>>
>
--
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