[PATCH v3 1/5] perf metric: Restructure struct expr_parse_ctx.

From: Ian Rogers
Date: Fri Nov 20 2020 - 22:11:45 EST

A later change to parsing the ids out (in expr__find_other) will
potentially drop hashmaps and so it is more convenient to move
expr_parse_ctx to have a hashmap pointer rather than a struct value. As
this pointer must be freed, rather than just going out of scope,
add expr__ctx_new and expr__ctx_free to manage expr_parse_ctx memory.
Adjust use of struct expr_parse_ctx accordingly.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
tools/perf/tests/expr.c | 81 ++++++++++++++++++-----------------
tools/perf/tests/pmu-events.c | 37 +++++++++-------
tools/perf/util/expr.c | 38 ++++++++++++----
tools/perf/util/expr.h | 5 ++-
tools/perf/util/metricgroup.c | 44 ++++++++++---------
tools/perf/util/stat-shadow.c | 50 +++++++++++++--------
6 files changed, 151 insertions(+), 104 deletions(-)

diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c
index 4d01051951cd..b0a3b5fd0c00 100644
--- a/tools/perf/tests/expr.c
+++ b/tools/perf/tests/expr.c
@@ -22,67 +22,70 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
const char *p;
double val;
int ret;
- struct expr_parse_ctx ctx;
+ struct expr_parse_ctx *ctx;

- expr__ctx_init(&ctx);
- expr__add_id_val(&ctx, strdup("FOO"), 1);
- expr__add_id_val(&ctx, strdup("BAR"), 2);
+ ctx = expr__ctx_new();
+ TEST_ASSERT_VAL("expr__ctx_new", ctx);
+ expr__add_id_val(ctx, strdup("FOO"), 1);
+ expr__add_id_val(ctx, strdup("BAR"), 2);

- ret = test(&ctx, "1+1", 2);
- ret |= test(&ctx, "FOO+BAR", 3);
- ret |= test(&ctx, "(BAR/2)%2", 1);
- ret |= test(&ctx, "1 - -4", 5);
- ret |= test(&ctx, "(FOO-1)*2 + (BAR/2)%2 - -4", 5);
- ret |= test(&ctx, "1-1 | 1", 1);
- ret |= test(&ctx, "1-1 & 1", 0);
- ret |= test(&ctx, "min(1,2) + 1", 2);
- ret |= test(&ctx, "max(1,2) + 1", 3);
- ret |= test(&ctx, "1+1 if 3*4 else 0", 2);
- ret |= test(&ctx, "1.1 + 2.1", 3.2);
- ret |= test(&ctx, ".1 + 2.", 2.1);
- ret |= test(&ctx, "d_ratio(1, 2)", 0.5);
- ret |= test(&ctx, "d_ratio(2.5, 0)", 0);
- ret |= test(&ctx, "1.1 < 2.2", 1);
- ret |= test(&ctx, "2.2 > 1.1", 1);
- ret |= test(&ctx, "1.1 < 1.1", 0);
- ret |= test(&ctx, "2.2 > 2.2", 0);
- ret |= test(&ctx, "2.2 < 1.1", 0);
- ret |= test(&ctx, "1.1 > 2.2", 0);
+ ret = test(ctx, "1+1", 2);
+ ret |= test(ctx, "FOO+BAR", 3);
+ ret |= test(ctx, "(BAR/2)%2", 1);
+ ret |= test(ctx, "1 - -4", 5);
+ ret |= test(ctx, "(FOO-1)*2 + (BAR/2)%2 - -4", 5);
+ ret |= test(ctx, "1-1 | 1", 1);
+ ret |= test(ctx, "1-1 & 1", 0);
+ ret |= test(ctx, "min(1,2) + 1", 2);
+ ret |= test(ctx, "max(1,2) + 1", 3);
+ ret |= test(ctx, "1+1 if 3*4 else 0", 2);
+ ret |= test(ctx, "1.1 + 2.1", 3.2);
+ ret |= test(ctx, ".1 + 2.", 2.1);
+ ret |= test(ctx, "d_ratio(1, 2)", 0.5);
+ ret |= test(ctx, "d_ratio(2.5, 0)", 0);
+ ret |= test(ctx, "1.1 < 2.2", 1);
+ ret |= test(ctx, "2.2 > 1.1", 1);
+ ret |= test(ctx, "1.1 < 1.1", 0);
+ ret |= test(ctx, "2.2 > 2.2", 0);
+ ret |= test(ctx, "2.2 < 1.1", 0);
+ ret |= test(ctx, "1.1 > 2.2", 0);

- if (ret)
+ if (ret) {
+ expr__ctx_free(ctx);
return ret;
+ }

p = "FOO/0";
- ret = expr__parse(&val, &ctx, p, 1);
+ ret = expr__parse(&val, ctx, p, 1);
TEST_ASSERT_VAL("division by zero", ret == -1);

p = "BAR/";
- ret = expr__parse(&val, &ctx, p, 1);
+ ret = expr__parse(&val, ctx, p, 1);
TEST_ASSERT_VAL("missing operand", ret == -1);

- expr__ctx_clear(&ctx);
+ expr__ctx_clear(ctx);
TEST_ASSERT_VAL("find other",
expr__find_other("FOO + BAR + BAZ + BOZO", "FOO",
- &ctx, 1) == 0);
- TEST_ASSERT_VAL("find other", hashmap__size(&ctx.ids) == 3);
- TEST_ASSERT_VAL("find other", hashmap__find(&ctx.ids, "BAR",
+ ctx, 1) == 0);
+ TEST_ASSERT_VAL("find other", hashmap__size(ctx->ids) == 3);
+ TEST_ASSERT_VAL("find other", hashmap__find(ctx->ids, "BAR",
(void **)&val_ptr));
- TEST_ASSERT_VAL("find other", hashmap__find(&ctx.ids, "BAZ",
+ TEST_ASSERT_VAL("find other", hashmap__find(ctx->ids, "BAZ",
(void **)&val_ptr));
- TEST_ASSERT_VAL("find other", hashmap__find(&ctx.ids, "BOZO",
+ TEST_ASSERT_VAL("find other", hashmap__find(ctx->ids, "BOZO",
(void **)&val_ptr));

- expr__ctx_clear(&ctx);
+ expr__ctx_clear(ctx);
TEST_ASSERT_VAL("find other",
expr__find_other("EVENT1\\,param\\=?@ + EVENT2\\,param\\=?@",
- NULL, &ctx, 3) == 0);
- TEST_ASSERT_VAL("find other", hashmap__size(&ctx.ids) == 2);
- TEST_ASSERT_VAL("find other", hashmap__find(&ctx.ids, "EVENT1,param=3/",
+ NULL, ctx, 3) == 0);
+ TEST_ASSERT_VAL("find other", hashmap__size(ctx->ids) == 2);
+ TEST_ASSERT_VAL("find other", hashmap__find(ctx->ids, "EVENT1,param=3/",
(void **)&val_ptr));
- TEST_ASSERT_VAL("find other", hashmap__find(&ctx.ids, "EVENT2,param=3/",
+ TEST_ASSERT_VAL("find other", hashmap__find(ctx->ids, "EVENT2,param=3/",
(void **)&val_ptr));

- expr__ctx_clear(&ctx);
+ expr__ctx_free(ctx);

return 0;
}
diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c
index ad2b21591275..294daf568bb6 100644
--- a/tools/perf/tests/pmu-events.c
+++ b/tools/perf/tests/pmu-events.c
@@ -478,9 +478,14 @@ static int test_parsing(void)
struct pmu_event *pe;
int i, j, k;
int ret = 0;
- struct expr_parse_ctx ctx;
+ struct expr_parse_ctx *ctx;
double result;

+ ctx = expr__ctx_new();
+ if (!ctx) {
+ pr_debug("expr__ctx_new failed");
+ return TEST_FAIL;
+ }
i = 0;
for (;;) {
map = &pmu_events_map[i++];
@@ -496,8 +501,8 @@ static int test_parsing(void)
break;
if (!pe->metric_expr)
continue;
- expr__ctx_init(&ctx);
- if (expr__find_other(pe->metric_expr, NULL, &ctx, 0)
+ expr__ctx_clear(ctx);
+ if (expr__find_other(pe->metric_expr, NULL, ctx, 0)
< 0) {
expr_failure("Parse other failed", map, pe);
ret++;
@@ -510,22 +515,22 @@ static int test_parsing(void)
* make them unique.
*/
k = 1;
- hashmap__for_each_entry((&ctx.ids), cur, bkt)
- expr__add_id_val(&ctx, strdup(cur->key), k++);
+ hashmap__for_each_entry(ctx->ids, cur, bkt)
+ expr__add_id_val(ctx, strdup(cur->key), k++);

- hashmap__for_each_entry((&ctx.ids), cur, bkt) {
+ hashmap__for_each_entry(ctx->ids, cur, bkt) {
if (check_parse_cpu(cur->key, map == cpus_map,
pe))
ret++;
}

- if (expr__parse(&result, &ctx, pe->metric_expr, 0)) {
+ if (expr__parse(&result, ctx, pe->metric_expr, 0)) {
expr_failure("Parse failed", map, pe);
ret++;
}
- expr__ctx_clear(&ctx);
}
}
+ expr__ctx_free(ctx);
/* TODO: fail when not ok */
return ret == 0 ? TEST_OK : TEST_SKIP;
}
@@ -544,7 +549,7 @@ static struct test_metric metrics[] = {

static int metric_parse_fake(const char *str)
{
- struct expr_parse_ctx ctx;
+ struct expr_parse_ctx *ctx;
struct hashmap_entry *cur;
double result;
int ret = -1;
@@ -553,8 +558,8 @@ static int metric_parse_fake(const char *str)

pr_debug("parsing '%s'\n", str);

- expr__ctx_init(&ctx);
- if (expr__find_other(str, NULL, &ctx, 0) < 0) {
+ ctx = expr__ctx_new();
+ if (expr__find_other(str, NULL, ctx, 0) < 0) {
pr_err("expr__find_other failed\n");
return -1;
}
@@ -565,23 +570,23 @@ static int metric_parse_fake(const char *str)
* make them unique.
*/
i = 1;
- hashmap__for_each_entry((&ctx.ids), cur, bkt)
- expr__add_id_val(&ctx, strdup(cur->key), i++);
+ hashmap__for_each_entry(ctx->ids, cur, bkt)
+ expr__add_id_val(ctx, strdup(cur->key), i++);

- hashmap__for_each_entry((&ctx.ids), cur, bkt) {
+ hashmap__for_each_entry(ctx->ids, cur, bkt) {
if (check_parse_fake(cur->key)) {
pr_err("check_parse_fake failed\n");
goto out;
}
}

- if (expr__parse(&result, &ctx, str, 1))
+ if (expr__parse(&result, ctx, str, 1))
pr_err("expr__parse failed\n");
else
ret = 0;

out:
- expr__ctx_clear(&ctx);
+ expr__ctx_free(ctx);
return ret;
}

diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
index a850fd0be3ee..e0623d38e6ee 100644
--- a/tools/perf/util/expr.c
+++ b/tools/perf/util/expr.c
@@ -73,7 +73,7 @@ int expr__add_id(struct expr_parse_ctx *ctx, const char *id)
data_ptr->parent = ctx->parent;
data_ptr->kind = EXPR_ID_DATA__PARENT;

- ret = hashmap__set(&ctx->ids, id, data_ptr,
+ ret = hashmap__set(ctx->ids, id, data_ptr,
(const void **)&old_key, (void **)&old_data);
if (ret)
free(data_ptr);
@@ -95,7 +95,7 @@ int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val)
data_ptr->val = val;
data_ptr->kind = EXPR_ID_DATA__VALUE;

- ret = hashmap__set(&ctx->ids, id, data_ptr,
+ ret = hashmap__set(ctx->ids, id, data_ptr,
(const void **)&old_key, (void **)&old_data);
if (ret)
free(data_ptr);
@@ -140,7 +140,7 @@ int expr__add_ref(struct expr_parse_ctx *ctx, struct metric_ref *ref)
data_ptr->ref.metric_expr = ref->metric_expr;
data_ptr->kind = EXPR_ID_DATA__REF;

- ret = hashmap__set(&ctx->ids, name, data_ptr,
+ ret = hashmap__set(ctx->ids, name, data_ptr,
(const void **)&old_key, (void **)&old_data);
if (ret)
free(data_ptr);
@@ -156,7 +156,7 @@ int expr__add_ref(struct expr_parse_ctx *ctx, struct metric_ref *ref)
int expr__get_id(struct expr_parse_ctx *ctx, const char *id,
struct expr_id_data **data)
{
- return hashmap__find(&ctx->ids, id, (void **)data) ? 0 : -1;
+ return hashmap__find(ctx->ids, id, (void **)data) ? 0 : -1;
}

int expr__resolve_id(struct expr_parse_ctx *ctx, const char *id,
@@ -205,15 +205,23 @@ void expr__del_id(struct expr_parse_ctx *ctx, const char *id)
struct expr_id_data *old_val = NULL;
char *old_key = NULL;

- hashmap__delete(&ctx->ids, id,
+ hashmap__delete(ctx->ids, id,
(const void **)&old_key, (void **)&old_val);
free(old_key);
free(old_val);
}

-void expr__ctx_init(struct expr_parse_ctx *ctx)
+struct expr_parse_ctx *expr__ctx_new(void)
{
- hashmap__init(&ctx->ids, key_hash, key_equal, NULL);
+ struct expr_parse_ctx *ctx;
+
+ ctx = malloc(sizeof(struct expr_parse_ctx));
+ if (!ctx)
+ return NULL;
+
+ ctx->ids = hashmap__new(key_hash, key_equal, NULL);
+ ctx->parent = NULL;
+ return ctx;
}

void expr__ctx_clear(struct expr_parse_ctx *ctx)
@@ -221,11 +229,23 @@ void expr__ctx_clear(struct expr_parse_ctx *ctx)
struct hashmap_entry *cur;
size_t bkt;

- hashmap__for_each_entry((&ctx->ids), cur, bkt) {
+ hashmap__for_each_entry(ctx->ids, cur, bkt) {
+ free((char *)cur->key);
+ free(cur->value);
+ }
+ hashmap__clear(ctx->ids);
+}
+
+void expr__ctx_free(struct expr_parse_ctx *ctx)
+{
+ struct hashmap_entry *cur;
+ size_t bkt;
+
+ hashmap__for_each_entry(ctx->ids, cur, bkt) {
free((char *)cur->key);
free(cur->value);
}
- hashmap__clear(&ctx->ids);
+ hashmap__free(ctx->ids);
}

static int
diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
index dcf8d19b83c8..00b941cfe6a6 100644
--- a/tools/perf/util/expr.h
+++ b/tools/perf/util/expr.h
@@ -19,7 +19,7 @@ struct expr_id {
};

struct expr_parse_ctx {
- struct hashmap ids;
+ struct hashmap *ids;
struct expr_id *parent;
};

@@ -30,8 +30,9 @@ struct expr_scanner_ctx {
int runtime;
};

-void expr__ctx_init(struct expr_parse_ctx *ctx);
+struct expr_parse_ctx *expr__ctx_new(void);
void expr__ctx_clear(struct expr_parse_ctx *ctx);
+void expr__ctx_free(struct expr_parse_ctx *ctx);
void expr__del_id(struct expr_parse_ctx *ctx, const char *id);
int expr__add_id(struct expr_parse_ctx *ctx, const char *id);
int expr__add_id_val(struct expr_parse_ctx *ctx, const char *id, double val);
diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 81d201c8b833..342dcccb860f 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -118,7 +118,7 @@ struct metric_ref_node {

struct metric {
struct list_head nd;
- struct expr_parse_ctx pctx;
+ struct expr_parse_ctx *pctx;
const char *metric_name;
const char *metric_expr;
const char *metric_unit;
@@ -190,7 +190,7 @@ static struct evsel *find_evsel_group(struct evlist *perf_evlist,
struct evsel *ev, *current_leader = NULL;
struct expr_id_data *val_ptr;
int i = 0, matched_events = 0, events_to_match;
- const int idnum = (int)hashmap__size(&pctx->ids);
+ const int idnum = (int)hashmap__size(pctx->ids);

/*
* duration_time is always grouped separately, when events are grouped
@@ -198,7 +198,7 @@ static struct evsel *find_evsel_group(struct evlist *perf_evlist,
* add it to metric_events at the end.
*/
if (!has_constraint &&
- hashmap__find(&pctx->ids, "duration_time", (void **)&val_ptr))
+ hashmap__find(pctx->ids, "duration_time", (void **)&val_ptr))
events_to_match = idnum - 1;
else
events_to_match = idnum;
@@ -234,7 +234,7 @@ static struct evsel *find_evsel_group(struct evlist *perf_evlist,
if (contains_event(metric_events, matched_events, ev->name))
continue;
/* Does this event belong to the parse context? */
- if (hashmap__find(&pctx->ids, ev->name, (void **)&val_ptr))
+ if (hashmap__find(pctx->ids, ev->name, (void **)&val_ptr))
metric_events[matched_events++] = ev;

if (matched_events == events_to_match)
@@ -313,12 +313,12 @@ static int metricgroup__setup_events(struct list_head *groups,
struct metric_ref *metric_refs = NULL;

metric_events = calloc(sizeof(void *),
- hashmap__size(&m->pctx.ids) + 1);
+ hashmap__size(m->pctx->ids) + 1);
if (!metric_events) {
ret = -ENOMEM;
break;
}
- evsel = find_evsel_group(perf_evlist, &m->pctx,
+ evsel = find_evsel_group(perf_evlist, m->pctx,
metric_no_merge,
m->has_constraint, metric_events,
evlist_used);
@@ -606,7 +606,7 @@ static void metricgroup__add_metric_weak_group(struct strbuf *events,
size_t bkt;
bool no_group = true, has_duration = false;

- hashmap__for_each_entry((&ctx->ids), cur, bkt) {
+ hashmap__for_each_entry(ctx->ids, cur, bkt) {
pr_debug("found event %s\n", (const char *)cur->key);
/*
* Duration time maps to a software event and can make
@@ -637,7 +637,7 @@ static void metricgroup__add_metric_non_group(struct strbuf *events,
size_t bkt;
bool first = true;

- hashmap__for_each_entry((&ctx->ids), cur, bkt) {
+ hashmap__for_each_entry(ctx->ids, cur, bkt) {
if (!first)
strbuf_addf(events, ",");
strbuf_addf(events, "%s", (const char *)cur->key);
@@ -703,7 +703,11 @@ static int __add_metric(struct list_head *metric_list,
if (!m)
return -ENOMEM;

- expr__ctx_init(&m->pctx);
+ m->pctx = expr__ctx_new();
+ if (!m->pctx) {
+ free(m);
+ return -ENOMEM;
+ }
m->metric_name = pe->metric_name;
m->metric_expr = pe->metric_expr;
m->metric_unit = pe->unit;
@@ -751,15 +755,15 @@ static int __add_metric(struct list_head *metric_list,

/* Force all found IDs in metric to have us as parent ID. */
WARN_ON_ONCE(!parent);
- m->pctx.parent = parent;
+ m->pctx->parent = parent;

/*
* For both the parent and referenced metrics, we parse
* all the metric's IDs and add it to the parent context.
*/
- if (expr__find_other(pe->metric_expr, NULL, &m->pctx, runtime) < 0) {
+ if (expr__find_other(pe->metric_expr, NULL, m->pctx, runtime) < 0) {
if (m->metric_refs_cnt == 0) {
- expr__ctx_clear(&m->pctx);
+ expr__ctx_free(m->pctx);
free(m);
*mp = NULL;
}
@@ -782,8 +786,8 @@ static int __add_metric(struct list_head *metric_list,
list_for_each_prev(pos, metric_list) {
struct metric *old = list_entry(pos, struct metric, nd);

- if (hashmap__size(&m->pctx.ids) <=
- hashmap__size(&old->pctx.ids))
+ if (hashmap__size(m->pctx->ids) <=
+ hashmap__size(old->pctx->ids))
break;
}
list_add(&m->nd, pos);
@@ -829,7 +833,7 @@ static int recursion_check(struct metric *m, const char *id, struct expr_id **pa
* if we already processed 'id', if we did, it's recursion
* and we fail.
*/
- ret = expr__get_id(&m->pctx, id, &data);
+ ret = expr__get_id(m->pctx, id, &data);
if (ret)
return ret;

@@ -884,7 +888,7 @@ static int __resolve_metric(struct metric *m,
*/
do {
all = true;
- hashmap__for_each_entry((&m->pctx.ids), cur, bkt) {
+ hashmap__for_each_entry(m->pctx->ids, cur, bkt) {
struct expr_id *parent;
struct pmu_event *pe;

@@ -898,7 +902,7 @@ static int __resolve_metric(struct metric *m,

all = false;
/* The metric key itself needs to go out.. */
- expr__del_id(&m->pctx, cur->key);
+ expr__del_id(m->pctx, cur->key);

/* ... and it gets resolved to the parent context. */
ret = add_metric(metric_list, pe, metric_no_group, &m, parent, ids);
@@ -1005,10 +1009,10 @@ static int metricgroup__add_metric(const char *metric, bool metric_no_group,

if (m->has_constraint) {
metricgroup__add_metric_non_group(events,
- &m->pctx);
+ m->pctx);
} else {
metricgroup__add_metric_weak_group(events,
- &m->pctx);
+ m->pctx);
}
}

@@ -1071,7 +1075,7 @@ static void metricgroup__free_metrics(struct list_head *metric_list)

list_for_each_entry_safe (m, tmp, metric_list, nd) {
metric__free_refs(m);
- expr__ctx_clear(&m->pctx);
+ expr__ctx_free(m->pctx);
list_del_init(&m->nd);
free(m);
}
diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 901265127e36..bea7b5c6b1c0 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -1,8 +1,10 @@
// SPDX-License-Identifier: GPL-2.0
+#include <math.h>
#include <stdio.h>
#include "evsel.h"
#include "stat.h"
#include "color.h"
+#include "debug.h"
#include "pmu.h"
#include "rblist.h"
#include "evlist.h"
@@ -335,12 +337,16 @@ void perf_stat__collect_metric_expr(struct evlist *evsel_list)
{
struct evsel *counter, *leader, **metric_events, *oc;
bool found;
- struct expr_parse_ctx ctx;
+ struct expr_parse_ctx *ctx;
struct hashmap_entry *cur;
size_t bkt;
int i;

- expr__ctx_init(&ctx);
+ ctx = expr__ctx_new();
+ if (!ctx) {
+ pr_debug("expr__ctx_new failed");
+ return;
+ }
evlist__for_each_entry(evsel_list, counter) {
bool invalid = false;

@@ -348,25 +354,25 @@ void perf_stat__collect_metric_expr(struct evlist *evsel_list)
if (!counter->metric_expr)
continue;

- expr__ctx_clear(&ctx);
+ expr__ctx_clear(ctx);
metric_events = counter->metric_events;
if (!metric_events) {
if (expr__find_other(counter->metric_expr,
counter->name,
- &ctx, 1) < 0)
+ ctx, 1) < 0)
continue;

metric_events = calloc(sizeof(struct evsel *),
- hashmap__size(&ctx.ids) + 1);
+ hashmap__size(ctx->ids) + 1);
if (!metric_events) {
- expr__ctx_clear(&ctx);
+ expr__ctx_free(ctx);
return;
}
counter->metric_events = metric_events;
}

i = 0;
- hashmap__for_each_entry((&ctx.ids), cur, bkt) {
+ hashmap__for_each_entry(ctx->ids, cur, bkt) {
const char *metric_name = (const char *)cur->key;

found = false;
@@ -418,7 +424,7 @@ void perf_stat__collect_metric_expr(struct evlist *evsel_list)
counter->metric_expr = NULL;
}
}
- expr__ctx_clear(&ctx);
+ expr__ctx_free(ctx);
}

static double runtime_stat_avg(struct runtime_stat *st,
@@ -793,7 +799,6 @@ static int prepare_metric(struct evsel **metric_events,
char *n, *pn;
int i, j, ret;

- expr__ctx_init(pctx);
for (i = 0; metric_events[i]; i++) {
struct saved_value *v;
struct stats *stats;
@@ -854,17 +859,22 @@ static void generic_metric(struct perf_stat_config *config,
struct runtime_stat *st)
{
print_metric_t print_metric = out->print_metric;
- struct expr_parse_ctx pctx;
+ struct expr_parse_ctx *pctx;
double ratio, scale;
int i;
void *ctxp = out->ctx;

- i = prepare_metric(metric_events, metric_refs, &pctx, cpu, st);
- if (i < 0)
+ pctx = expr__ctx_new();
+ if (!pctx)
return;

+ i = prepare_metric(metric_events, metric_refs, pctx, cpu, st);
+ if (i < 0) {
+ expr__ctx_free(pctx);
+ return;
+ }
if (!metric_events[i]) {
- if (expr__parse(&ratio, &pctx, metric_expr, runtime) == 0) {
+ if (expr__parse(&ratio, pctx, metric_expr, runtime) == 0) {
char *unit;
char metric_bf[64];

@@ -900,22 +910,26 @@ static void generic_metric(struct perf_stat_config *config,
(metric_name ? metric_name : name) : "", 0);
}

- expr__ctx_clear(&pctx);
+ expr__ctx_free(pctx);
}

double test_generic_metric(struct metric_expr *mexp, int cpu, struct runtime_stat *st)
{
- struct expr_parse_ctx pctx;
+ struct expr_parse_ctx *pctx;
double ratio = 0.0;

- if (prepare_metric(mexp->metric_events, mexp->metric_refs, &pctx, cpu, st) < 0)
+ pctx = expr__ctx_new();
+ if (!pctx)
+ return NAN;
+
+ if (prepare_metric(mexp->metric_events, mexp->metric_refs, pctx, cpu, st) < 0)
goto out;

- if (expr__parse(&ratio, &pctx, mexp->metric_expr, 1))
+ if (expr__parse(&ratio, pctx, mexp->metric_expr, 1))
ratio = 0.0;

out:
- expr__ctx_clear(&pctx);
+ expr__ctx_free(pctx);
return ratio;
}

--
2.29.2.454.gaff20da3a2-goog