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perf parse events: Demystify memory allocations

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List heads are currently allocated way down the function chain in
__add_event and add_tracepoint and then freed when the scanner code
calls parse_events_update_lists.

Be more explicit with where memory is allocated and who should free it. With
this patch the list_head is allocated in the scanner code and freed when the
scanner code calls parse_events_update_lists.

Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1372793245-4136-7-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
David Ahern
2013-07-02 13:27:25 -06:00
committed by Arnaldo Carvalho de Melo
parent c549aca501
commit c5cd8ac07e
3 changed files with 61 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
tools/perf/util/parse-events.y
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@@ -22,6 +22,13 @@ do { \
YYABORT; \
} while (0)
#define ALLOC_LIST(list) \
do { \
list = malloc(sizeof(*list)); \
ABORT_ON(!list); \
INIT_LIST_HEAD(list); \
} while (0)
static inc_group_count(struct list_head *list,
struct parse_events_evlist *data)
{
@@ -196,9 +203,10 @@ event_pmu:
PE_NAME '/' event_config '/'
{
struct parse_events_evlist *data = _data;
struct list_head *list = NULL;
struct list_head *list;
ABORT_ON(parse_events_add_pmu(&list, &data->idx, $1, $3));
ALLOC_LIST(list);
ABORT_ON(parse_events_add_pmu(list, &data->idx, $1, $3));
parse_events__free_terms($3);
$$ = list;
}
@@ -212,11 +220,12 @@ event_legacy_symbol:
value_sym '/' event_config '/'
{
struct parse_events_evlist *data = _data;
struct list_head *list = NULL;
struct list_head *list;
int type = $1 >> 16;
int config = $1 & 255;
ABORT_ON(parse_events_add_numeric(&list, &data->idx,
ALLOC_LIST(list);
ABORT_ON(parse_events_add_numeric(list, &data->idx,
type, config, $3));
parse_events__free_terms($3);
$$ = list;
@@ -225,11 +234,12 @@ value_sym '/' event_config '/'
value_sym sep_slash_dc
{
struct parse_events_evlist *data = _data;
struct list_head *list = NULL;
struct list_head *list;
int type = $1 >> 16;
int config = $1 & 255;
ABORT_ON(parse_events_add_numeric(&list, &data->idx,
ALLOC_LIST(list);
ABORT_ON(parse_events_add_numeric(list, &data->idx,
type, config, NULL));
$$ = list;
}
@@ -238,27 +248,30 @@ event_legacy_cache:
PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT '-' PE_NAME_CACHE_OP_RESULT
{
struct parse_events_evlist *data = _data;
struct list_head *list = NULL;
struct list_head *list;
ABORT_ON(parse_events_add_cache(&list, &data->idx, $1, $3, $5));
ALLOC_LIST(list);
ABORT_ON(parse_events_add_cache(list, &data->idx, $1, $3, $5));
$$ = list;
}
|
PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT
{
struct parse_events_evlist *data = _data;
struct list_head *list = NULL;
struct list_head *list;
ABORT_ON(parse_events_add_cache(&list, &data->idx, $1, $3, NULL));
ALLOC_LIST(list);
ABORT_ON(parse_events_add_cache(list, &data->idx, $1, $3, NULL));
$$ = list;
}
|
PE_NAME_CACHE_TYPE
{
struct parse_events_evlist *data = _data;
struct list_head *list = NULL;
struct list_head *list;
ABORT_ON(parse_events_add_cache(&list, &data->idx, $1, NULL, NULL));
ALLOC_LIST(list);
ABORT_ON(parse_events_add_cache(list, &data->idx, $1, NULL, NULL));
$$ = list;
}
@@ -266,9 +279,10 @@ event_legacy_mem:
PE_PREFIX_MEM PE_VALUE ':' PE_MODIFIER_BP sep_dc
{
struct parse_events_evlist *data = _data;
struct list_head *list = NULL;
struct list_head *list;
ABORT_ON(parse_events_add_breakpoint(&list, &data->idx,
ALLOC_LIST(list);
ABORT_ON(parse_events_add_breakpoint(list, &data->idx,
(void *) $2, $4));
$$ = list;
}
@@ -276,9 +290,10 @@ PE_PREFIX_MEM PE_VALUE ':' PE_MODIFIER_BP sep_dc
PE_PREFIX_MEM PE_VALUE sep_dc
{
struct parse_events_evlist *data = _data;
struct list_head *list = NULL;
struct list_head *list;
ABORT_ON(parse_events_add_breakpoint(&list, &data->idx,
ALLOC_LIST(list);
ABORT_ON(parse_events_add_breakpoint(list, &data->idx,
(void *) $2, NULL));
$$ = list;
}
@@ -287,9 +302,10 @@ event_legacy_tracepoint:
PE_NAME ':' PE_NAME
{
struct parse_events_evlist *data = _data;
struct list_head *list = NULL;
struct list_head *list;
ABORT_ON(parse_events_add_tracepoint(&list, &data->idx, $1, $3));
ALLOC_LIST(list);
ABORT_ON(parse_events_add_tracepoint(list, &data->idx, $1, $3));
$$ = list;
}
@@ -297,9 +313,10 @@ event_legacy_numeric:
PE_VALUE ':' PE_VALUE
{
struct parse_events_evlist *data = _data;
struct list_head *list = NULL;
struct list_head *list;
ABORT_ON(parse_events_add_numeric(&list, &data->idx, (u32)$1, $3, NULL));
ALLOC_LIST(list);
ABORT_ON(parse_events_add_numeric(list, &data->idx, (u32)$1, $3, NULL));
$$ = list;
}
@@ -307,9 +324,10 @@ event_legacy_raw:
PE_RAW
{
struct parse_events_evlist *data = _data;
struct list_head *list = NULL;
struct list_head *list;
ABORT_ON(parse_events_add_numeric(&list, &data->idx,
ALLOC_LIST(list);
ABORT_ON(parse_events_add_numeric(list, &data->idx,
PERF_TYPE_RAW, $1, NULL));
$$ = list;
}