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Subject[PATCH 8/8] perf, tool: Use allocated list for each parsed event
Date
Switch from using static temporary event list into dynamically
allocated one. This way we dont need to pass temp list to the
parse_events_parse which makes the interface more clear.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
---
tools/perf/util/parse-events.c | 39 ++++++++++++++---------
tools/perf/util/parse-events.h | 16 +++------
tools/perf/util/parse-events.y | 69 ++++++++++++++++++++++++++++++---------
3 files changed, 83 insertions(+), 41 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index b6136fd..d4abd00 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -26,8 +26,7 @@ struct event_symbol {
#ifdef PARSER_DEBUG
extern int parse_events_debug;
#endif
-int parse_events_parse(struct list_head *list, struct list_head *list_tmp,
- int *idx);
+int parse_events_parse(struct list_head *list, int *idx);

#define CHW(x) .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_##x
#define CSW(x) .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_##x
@@ -358,20 +357,30 @@ const char *__event_name(int type, u64 config)
return "unknown";
}

-static int add_event(struct list_head *list, int *idx,
+static int add_event(struct list_head **_list, int *idx,
struct perf_event_attr *attr, char *name)
{
struct perf_evsel *evsel;
+ struct list_head *list = *_list;
+
+ if (!list) {
+ list = malloc(sizeof(*list));
+ if (!list)
+ return -ENOMEM;
+ INIT_LIST_HEAD(list);
+ }

event_attr_init(attr);

evsel = perf_evsel__new(attr, (*idx)++);
- if (!evsel)
+ if (!evsel) {
+ free(list);
return -ENOMEM;
-
- list_add_tail(&evsel->node, list);
+ }

evsel->name = strdup(name);
+ list_add_tail(&evsel->node, list);
+ *_list = list;
return 0;
}

@@ -393,7 +402,7 @@ static int parse_aliases(char *str, const char *names[][MAX_ALIASES], int size)
return -1;
}

-int parse_events_add_cache(struct list_head *list, int *idx,
+int parse_events_add_cache(struct list_head **list, int *idx,
char *type, char *op_result1, char *op_result2)
{
struct perf_event_attr attr;
@@ -454,7 +463,7 @@ int parse_events_add_cache(struct list_head *list, int *idx,
return add_event(list, idx, &attr, name);
}

-static int add_tracepoint(struct list_head *list, int *idx,
+static int add_tracepoint(struct list_head **list, int *idx,
char *sys_name, char *evt_name)
{
struct perf_event_attr attr;
@@ -491,7 +500,7 @@ static int add_tracepoint(struct list_head *list, int *idx,
return add_event(list, idx, &attr, name);
}

-static int add_tracepoint_multi(struct list_head *list, int *idx,
+static int add_tracepoint_multi(struct list_head **list, int *idx,
char *sys_name, char *evt_name)
{
char evt_path[MAXPATHLEN];
@@ -522,7 +531,7 @@ static int add_tracepoint_multi(struct list_head *list, int *idx,
return ret;
}

-int parse_events_add_tracepoint(struct list_head *list, int *idx,
+int parse_events_add_tracepoint(struct list_head **list, int *idx,
char *sys, char *event)
{
int ret;
@@ -566,7 +575,7 @@ parse_breakpoint_type(const char *type, struct perf_event_attr *attr)
return 0;
}

-int parse_events_add_breakpoint(struct list_head *list, int *idx,
+int parse_events_add_breakpoint(struct list_head **list, int *idx,
void *ptr, char *type)
{
struct perf_event_attr attr;
@@ -738,7 +747,7 @@ static int config_attr(struct perf_event_attr *attr,
return 0;
}

-int parse_events_add_numeric(struct list_head *list, int *idx,
+int parse_events_add_numeric(struct list_head **list, int *idx,
unsigned long type, unsigned long config,
struct list_head *head_config)
{
@@ -756,7 +765,7 @@ int parse_events_add_numeric(struct list_head *list, int *idx,
(char *) __event_name(type, config));
}

-int parse_events_add_pmu(struct list_head *list, int *idx,
+int parse_events_add_pmu(struct list_head **list, int *idx,
char *name, struct list_head *head_config)
{
struct perf_event_attr attr;
@@ -791,7 +800,7 @@ void parse_events_update_lists(struct list_head *list_event,
* list, for next event definition.
*/
list_splice_tail(list_event, list_all);
- INIT_LIST_HEAD(list_event);
+ free(list_event);
}

int parse_events_modifier(struct list_head *list, char *str)
@@ -869,7 +878,7 @@ int parse_events(struct perf_evlist *evlist, const char *str, int unset __used)
#ifdef PARSER_DEBUG
parse_events_debug = 1;
#endif
- ret = parse_events_parse(&list, &list_tmp, &idx);
+ ret = parse_events_parse(&list, &idx);

parse_events__flush_buffer(buffer);
parse_events__delete_buffer(buffer);
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index 66e08f4..8651757 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -87,25 +87,21 @@ int parse_events__term_elem(struct parse_events__term_elem **_e,
int type_val, char *str, long num);
int parse_events__branch_type(u64 *_type, char *str);
void parse_events__free_terms(struct list_head *terms);
-int parse_events_modifier(struct list_head *list __used, char *str __used);
-int parse_events_add_tracepoint(struct list_head *list, int *idx,
+int parse_events_modifier(struct list_head *list, char *str);
+int parse_events_add_tracepoint(struct list_head **list, int *idx,
char *sys, char *event);
-int parse_events_add_raw(struct perf_evlist *evlist, unsigned long config,
- unsigned long config1, unsigned long config2,
- char *mod);
-int parse_events_add_numeric(struct list_head *list, int *idx,
+int parse_events_add_numeric(struct list_head **list, int *idx,
unsigned long type, unsigned long config,
struct list_head *head_config);
-int parse_events_add_cache(struct list_head *list, int *idx,
+int parse_events_add_cache(struct list_head **list, int *idx,
char *type, char *op_result1, char *op_result2);
-int parse_events_add_breakpoint(struct list_head *list, int *idx,
+int parse_events_add_breakpoint(struct list_head **list, int *idx,
void *ptr, char *type);
-int parse_events_add_pmu(struct list_head *list, int *idx,
+int parse_events_add_pmu(struct list_head **list, int *idx,
char *pmu , struct list_head *head_config);
void parse_events_update_lists(struct list_head *list_event,
struct list_head *list_all);
void parse_events_error(struct list_head *list_all,
- struct list_head *list_event,
int *idx, char const *msg);
int parse_events__test(void);

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index ef3ee2d..5899a0e 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -1,7 +1,6 @@

%name-prefix "parse_events_"
%parse-param {struct list_head *list_all}
-%parse-param {struct list_head *list_event}
%parse-param {int *idx}

%{
@@ -43,6 +42,14 @@ do { \
%type <term> event_term
%type <head> event_term_list
%type <elem> event_term_elem
+%type <head> event_pmu
+%type <head> event_legacy_symbol
+%type <head> event_legacy_cache
+%type <head> event_legacy_mem
+%type <head> event_legacy_tracepoint
+%type <head> event_legacy_numeric
+%type <head> event_legacy_raw
+%type <head> event_def

%union
{
@@ -65,13 +72,13 @@ event_def PE_MODIFIER_EVENT
* (there could be more events added for multiple tracepoint
* definitions via '*?'.
*/
- ABORT_ON(parse_events_modifier(list_event, $2));
- parse_events_update_lists(list_event, list_all);
+ ABORT_ON(parse_events_modifier($1, $2));
+ parse_events_update_lists($1, list_all);
}
|
event_def
{
- parse_events_update_lists(list_event, list_all);
+ parse_events_update_lists($1, list_all);
}

event_def: event_pmu |
@@ -85,71 +92,102 @@ event_def: event_pmu |
event_pmu:
PE_NAME '/' event_config '/'
{
- ABORT_ON(parse_events_add_pmu(list_event, idx, $1, $3));
+ struct list_head *list = NULL;
+
+ ABORT_ON(parse_events_add_pmu(&list, idx, $1, $3));
parse_events__free_terms($3);
+ $$ = list;
}

event_legacy_symbol:
PE_VALUE_SYM '/' event_config '/'
{
+ struct list_head *list = NULL;
int type = $1 >> 16;
int config = $1 & 255;

- ABORT_ON(parse_events_add_numeric(list_event, idx, type, config, $3));
+ ABORT_ON(parse_events_add_numeric(&list, idx, type, config, $3));
parse_events__free_terms($3);
+ $$ = list;
}
|
PE_VALUE_SYM sep_slash_dc
{
+ struct list_head *list = NULL;
int type = $1 >> 16;
int config = $1 & 255;

- ABORT_ON(parse_events_add_numeric(list_event, idx, type, config, NULL));
+ ABORT_ON(parse_events_add_numeric(&list, idx, type, config, NULL));
+ $$ = list;
}

event_legacy_cache:
PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT '-' PE_NAME_CACHE_OP_RESULT
{
- ABORT_ON(parse_events_add_cache(list_event, idx, $1, $3, $5));
+ struct list_head *list = NULL;
+
+ ABORT_ON(parse_events_add_cache(&list, idx, $1, $3, $5));
+ $$ = list;
}
|
PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT
{
- ABORT_ON(parse_events_add_cache(list_event, idx, $1, $3, NULL));
+ struct list_head *list = NULL;
+
+ ABORT_ON(parse_events_add_cache(&list, idx, $1, $3, NULL));
+ $$ = list;
}
|
PE_NAME_CACHE_TYPE
{
- ABORT_ON(parse_events_add_cache(list_event, idx, $1, NULL, NULL));
+ struct list_head *list = NULL;
+
+ ABORT_ON(parse_events_add_cache(&list, idx, $1, NULL, NULL));
+ $$ = list;
}

event_legacy_mem:
PE_PREFIX_MEM PE_VALUE ':' PE_MODIFIER_BP sep_dc
{
- ABORT_ON(parse_events_add_breakpoint(list_event, idx, (void *) $2, $4));
+ struct list_head *list = NULL;
+
+ ABORT_ON(parse_events_add_breakpoint(&list, idx, (void *) $2, $4));
+ $$ = list;
}
|
PE_PREFIX_MEM PE_VALUE sep_dc
{
- ABORT_ON(parse_events_add_breakpoint(list_event, idx, (void *) $2, NULL));
+ struct list_head *list = NULL;
+
+ ABORT_ON(parse_events_add_breakpoint(&list, idx, (void *) $2, NULL));
+ $$ = list;
}

event_legacy_tracepoint:
PE_NAME ':' PE_NAME
{
- ABORT_ON(parse_events_add_tracepoint(list_event, idx, $1, $3));
+ struct list_head *list = NULL;
+
+ ABORT_ON(parse_events_add_tracepoint(&list, idx, $1, $3));
+ $$ = list;
}

event_legacy_numeric:
PE_VALUE ':' PE_VALUE
{
- ABORT_ON(parse_events_add_numeric(list_event, idx, $1, $3, NULL));
+ struct list_head *list = NULL;
+
+ ABORT_ON(parse_events_add_numeric(&list, idx, $1, $3, NULL));
+ $$ = list;
}

event_legacy_raw:
PE_RAW
{
- ABORT_ON(parse_events_add_numeric(list_event, idx, PERF_TYPE_RAW, $1, NULL));
+ struct list_head *list = NULL;
+
+ ABORT_ON(parse_events_add_numeric(&list, idx, PERF_TYPE_RAW, $1, NULL));
+ $$ = list;
}

event_config:
@@ -284,7 +322,6 @@ sep_slash_dc: '/' | ':' |
%%

void parse_events_error(struct list_head *list_all __used,
- struct list_head *list_event __used,
int *idx __used,
char const *msg __used)
{
--
1.7.7.6


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