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perf parse: Refactor 'struct perf_evsel_config_term'
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The struct perf_evsel_config_term::val is a union which contains fields
'callgraph', 'drv_cfg' and 'branch' as string pointers.  This leads to
the complex code logic for handling every type's string separately, and
it's hard to release string as a general way.

This patch refactors the structure to add a common field 'str' in the
'val' union as string pointer and remove the other three fields
'callgraph', 'drv_cfg' and 'branch'.  Without passing field name, the
patch simplifies the string handling with macro ADD_CONFIG_TERM_STR()
for string pointer assignment.

This patch fixes multiple warnings of line over 80 characters detected
by checkpatch tool.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lore.kernel.org/lkml/20200117055251.24058-1-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Leo Yan authored and Arnaldo Carvalho de Melo committed Jan 30, 2020
1 parent 0cc4bd8 commit e884602
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Showing 4 changed files with 45 additions and 29 deletions.
2 changes: 1 addition & 1 deletion tools/perf/arch/arm/util/cs-etm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -226,7 +226,7 @@ static int cs_etm_set_sink_attr(struct perf_pmu *pmu,
if (term->type != PERF_EVSEL__CONFIG_TERM_DRV_CFG)
continue;

sink = term->val.drv_cfg;
sink = term->val.str;
snprintf(path, PATH_MAX, "sinks/%s", sink);

ret = perf_pmu__scan_file(pmu, path, "%x", &hash);
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6 changes: 3 additions & 3 deletions tools/perf/util/evsel.c
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Original file line number Diff line number Diff line change
Expand Up @@ -808,12 +808,12 @@ static void apply_config_terms(struct evsel *evsel,
perf_evsel__reset_sample_bit(evsel, TIME);
break;
case PERF_EVSEL__CONFIG_TERM_CALLGRAPH:
callgraph_buf = term->val.callgraph;
callgraph_buf = term->val.str;
break;
case PERF_EVSEL__CONFIG_TERM_BRANCH:
if (term->val.branch && strcmp(term->val.branch, "no")) {
if (term->val.str && strcmp(term->val.str, "no")) {
perf_evsel__set_sample_bit(evsel, BRANCH_STACK);
parse_branch_str(term->val.branch,
parse_branch_str(term->val.str,
&attr->branch_sample_type);
} else
perf_evsel__reset_sample_bit(evsel, BRANCH_STACK);
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4 changes: 1 addition & 3 deletions tools/perf/util/evsel_config.h
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Original file line number Diff line number Diff line change
Expand Up @@ -36,18 +36,16 @@ struct perf_evsel_config_term {
u64 period;
u64 freq;
bool time;
char *callgraph;
char *drv_cfg;
u64 stack_user;
int max_stack;
bool inherit;
bool overwrite;
char *branch;
unsigned long max_events;
bool percore;
bool aux_output;
u32 aux_sample_size;
u64 cfg_chg;
char *str;
} val;
bool weak;
};
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62 changes: 40 additions & 22 deletions tools/perf/util/parse-events.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1219,8 +1219,7 @@ static int config_attr(struct perf_event_attr *attr,
static int get_config_terms(struct list_head *head_config,
struct list_head *head_terms __maybe_unused)
{
#define ADD_CONFIG_TERM(__type, __name, __val) \
do { \
#define ADD_CONFIG_TERM(__type) \
struct perf_evsel_config_term *__t; \
\
__t = zalloc(sizeof(*__t)); \
Expand All @@ -1229,63 +1228,82 @@ do { \
\
INIT_LIST_HEAD(&__t->list); \
__t->type = PERF_EVSEL__CONFIG_TERM_ ## __type; \
__t->val.__name = __val; \
__t->weak = term->weak; \
list_add_tail(&__t->list, head_terms); \
list_add_tail(&__t->list, head_terms)

#define ADD_CONFIG_TERM_VAL(__type, __name, __val) \
do { \
ADD_CONFIG_TERM(__type); \
__t->val.__name = __val; \
} while (0)

#define ADD_CONFIG_TERM_STR(__type, __val) \
do { \
ADD_CONFIG_TERM(__type); \
__t->val.str = __val; \
} while (0)

struct parse_events_term *term;

list_for_each_entry(term, head_config, list) {
switch (term->type_term) {
case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
ADD_CONFIG_TERM(PERIOD, period, term->val.num);
ADD_CONFIG_TERM_VAL(PERIOD, period, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:
ADD_CONFIG_TERM(FREQ, freq, term->val.num);
ADD_CONFIG_TERM_VAL(FREQ, freq, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_TIME:
ADD_CONFIG_TERM(TIME, time, term->val.num);
ADD_CONFIG_TERM_VAL(TIME, time, term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_CALLGRAPH:
ADD_CONFIG_TERM(CALLGRAPH, callgraph, term->val.str);
ADD_CONFIG_TERM_STR(CALLGRAPH, term->val.str);
break;
case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
ADD_CONFIG_TERM(BRANCH, branch, term->val.str);
ADD_CONFIG_TERM_STR(BRANCH, term->val.str);
break;
case PARSE_EVENTS__TERM_TYPE_STACKSIZE:
ADD_CONFIG_TERM(STACK_USER, stack_user, term->val.num);
ADD_CONFIG_TERM_VAL(STACK_USER, stack_user,
term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_INHERIT:
ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 1 : 0);
ADD_CONFIG_TERM_VAL(INHERIT, inherit,
term->val.num ? 1 : 0);
break;
case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
ADD_CONFIG_TERM(INHERIT, inherit, term->val.num ? 0 : 1);
ADD_CONFIG_TERM_VAL(INHERIT, inherit,
term->val.num ? 0 : 1);
break;
case PARSE_EVENTS__TERM_TYPE_MAX_STACK:
ADD_CONFIG_TERM(MAX_STACK, max_stack, term->val.num);
ADD_CONFIG_TERM_VAL(MAX_STACK, max_stack,
term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_MAX_EVENTS:
ADD_CONFIG_TERM(MAX_EVENTS, max_events, term->val.num);
ADD_CONFIG_TERM_VAL(MAX_EVENTS, max_events,
term->val.num);
break;
case PARSE_EVENTS__TERM_TYPE_OVERWRITE:
ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 1 : 0);
ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
term->val.num ? 1 : 0);
break;
case PARSE_EVENTS__TERM_TYPE_NOOVERWRITE:
ADD_CONFIG_TERM(OVERWRITE, overwrite, term->val.num ? 0 : 1);
ADD_CONFIG_TERM_VAL(OVERWRITE, overwrite,
term->val.num ? 0 : 1);
break;
case PARSE_EVENTS__TERM_TYPE_DRV_CFG:
ADD_CONFIG_TERM(DRV_CFG, drv_cfg, term->val.str);
ADD_CONFIG_TERM_STR(DRV_CFG, term->val.str);
break;
case PARSE_EVENTS__TERM_TYPE_PERCORE:
ADD_CONFIG_TERM(PERCORE, percore,
term->val.num ? true : false);
ADD_CONFIG_TERM_VAL(PERCORE, percore,
term->val.num ? true : false);
break;
case PARSE_EVENTS__TERM_TYPE_AUX_OUTPUT:
ADD_CONFIG_TERM(AUX_OUTPUT, aux_output, term->val.num ? 1 : 0);
ADD_CONFIG_TERM_VAL(AUX_OUTPUT, aux_output,
term->val.num ? 1 : 0);
break;
case PARSE_EVENTS__TERM_TYPE_AUX_SAMPLE_SIZE:
ADD_CONFIG_TERM(AUX_SAMPLE_SIZE, aux_sample_size, term->val.num);
ADD_CONFIG_TERM_VAL(AUX_SAMPLE_SIZE, aux_sample_size,
term->val.num);
break;
default:
break;
Expand Down Expand Up @@ -1322,7 +1340,7 @@ static int get_config_chgs(struct perf_pmu *pmu, struct list_head *head_config,
}

if (bits)
ADD_CONFIG_TERM(CFG_CHG, cfg_chg, bits);
ADD_CONFIG_TERM_VAL(CFG_CHG, cfg_chg, bits);

#undef ADD_CONFIG_TERM
return 0;
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