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Date: Wed, 23 Oct 2019 10:55:59 +0200
From: Jiri Olsa <jolsa@...hat.com>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Namhyung Kim <namhyung@...nel.org>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
Andi Kleen <ak@...ux.intel.com>,
Jin Yao <yao.jin@...ux.intel.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>,
John Garry <john.garry@...wei.com>,
linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
bpf@...r.kernel.org, clang-built-linux@...glegroups.com,
Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH v2 4/9] perf tools: move ALLOC_LIST into a function
On Tue, Oct 22, 2019 at 05:53:32PM -0700, Ian Rogers wrote:
> Having a YYABORT in a macro makes it hard to free memory for components
> of a rule. Separate the logic out.
Acked-by: Jiri Olsa <jolsa@...nel.org>
thanks,
jirka
>
> Signed-off-by: Ian Rogers <irogers@...gle.com>
> ---
> tools/perf/util/parse-events.y | 65 ++++++++++++++++++++++------------
> 1 file changed, 43 insertions(+), 22 deletions(-)
>
> diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
> index 27d6b187c9b1..26cb65798522 100644
> --- a/tools/perf/util/parse-events.y
> +++ b/tools/perf/util/parse-events.y
> @@ -25,12 +25,17 @@ do { \
> YYABORT; \
> } while (0)
>
> -#define ALLOC_LIST(list) \
> -do { \
> - list = malloc(sizeof(*list)); \
> - ABORT_ON(!list); \
> - INIT_LIST_HEAD(list); \
> -} while (0)
> +static struct list_head* alloc_list()
> +{
> + struct list_head *list;
> +
> + list = malloc(sizeof(*list));
> + if (!list)
> + return NULL;
> +
> + INIT_LIST_HEAD(list);
> + return list;
> +}
>
> static void inc_group_count(struct list_head *list,
> struct parse_events_state *parse_state)
> @@ -238,7 +243,8 @@ PE_NAME opt_pmu_config
> if (error)
> error->idx = @1.first_column;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> if (parse_events_add_pmu(_parse_state, list, $1, $2, false, false)) {
> struct perf_pmu *pmu = NULL;
> int ok = 0;
> @@ -306,7 +312,8 @@ value_sym '/' event_config '/'
> int type = $1 >> 16;
> int config = $1 & 255;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_numeric(_parse_state, list, type, config, $3));
> parse_events_terms__delete($3);
> $$ = list;
> @@ -318,7 +325,8 @@ value_sym sep_slash_slash_dc
> int type = $1 >> 16;
> int config = $1 & 255;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_numeric(_parse_state, list, type, config, NULL));
> $$ = list;
> }
> @@ -327,7 +335,8 @@ PE_VALUE_SYM_TOOL sep_slash_slash_dc
> {
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_tool(_parse_state, list, $1));
> $$ = list;
> }
> @@ -339,7 +348,8 @@ PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT '-' PE_NAME_CACHE_OP_RESULT opt_e
> struct parse_events_error *error = parse_state->error;
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_cache(list, &parse_state->idx, $1, $3, $5, error, $6));
> parse_events_terms__delete($6);
> $$ = list;
> @@ -351,7 +361,8 @@ PE_NAME_CACHE_TYPE '-' PE_NAME_CACHE_OP_RESULT opt_event_config
> struct parse_events_error *error = parse_state->error;
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_cache(list, &parse_state->idx, $1, $3, NULL, error, $4));
> parse_events_terms__delete($4);
> $$ = list;
> @@ -363,7 +374,8 @@ PE_NAME_CACHE_TYPE opt_event_config
> struct parse_events_error *error = parse_state->error;
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_cache(list, &parse_state->idx, $1, NULL, NULL, error, $2));
> parse_events_terms__delete($2);
> $$ = list;
> @@ -375,7 +387,8 @@ PE_PREFIX_MEM PE_VALUE '/' PE_VALUE ':' PE_MODIFIER_BP sep_dc
> struct parse_events_state *parse_state = _parse_state;
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_breakpoint(list, &parse_state->idx,
> (void *) $2, $6, $4));
> $$ = list;
> @@ -386,7 +399,8 @@ PE_PREFIX_MEM PE_VALUE '/' PE_VALUE sep_dc
> struct parse_events_state *parse_state = _parse_state;
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_breakpoint(list, &parse_state->idx,
> (void *) $2, NULL, $4));
> $$ = list;
> @@ -397,7 +411,8 @@ PE_PREFIX_MEM PE_VALUE ':' PE_MODIFIER_BP sep_dc
> struct parse_events_state *parse_state = _parse_state;
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_breakpoint(list, &parse_state->idx,
> (void *) $2, $4, 0));
> $$ = list;
> @@ -408,7 +423,8 @@ PE_PREFIX_MEM PE_VALUE sep_dc
> struct parse_events_state *parse_state = _parse_state;
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_breakpoint(list, &parse_state->idx,
> (void *) $2, NULL, 0));
> $$ = list;
> @@ -421,7 +437,8 @@ tracepoint_name opt_event_config
> struct parse_events_error *error = parse_state->error;
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> if (error)
> error->idx = @1.first_column;
>
> @@ -457,7 +474,8 @@ PE_VALUE ':' PE_VALUE opt_event_config
> {
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_numeric(_parse_state, list, (u32)$1, $3, $4));
> parse_events_terms__delete($4);
> $$ = list;
> @@ -468,7 +486,8 @@ PE_RAW opt_event_config
> {
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_add_numeric(_parse_state, list, PERF_TYPE_RAW, $1, $2));
> parse_events_terms__delete($2);
> $$ = list;
> @@ -480,7 +499,8 @@ PE_BPF_OBJECT opt_event_config
> struct parse_events_state *parse_state = _parse_state;
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_load_bpf(parse_state, list, $1, false, $2));
> parse_events_terms__delete($2);
> $$ = list;
> @@ -490,7 +510,8 @@ PE_BPF_SOURCE opt_event_config
> {
> struct list_head *list;
>
> - ALLOC_LIST(list);
> + list = alloc_list();
> + ABORT_ON(!list);
> ABORT_ON(parse_events_load_bpf(_parse_state, list, $1, true, $2));
> parse_events_terms__delete($2);
> $$ = list;
> --
> 2.23.0.866.gb869b98d4c-goog
>
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