perf expr: Straighten expr__parse()/expr__find_other() interface

Now that we have a flex parser we don't need to update the parsed string
pointer, so the interface can just be passed the pointer to the
expression instead of a pointer to pointer.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Link: http://lore.kernel.org/lkml/20200228093616.67125-5-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c
index 87843af..755d73c 100644 (file)
--- a/tools/perf/tests/expr.c
+++ b/tools/perf/tests/expr.c
@@ -10,7 +10,7 @@ static int test(struct parse_ctx *ctx, const char *e, double val2)
 {
        double val;
 
-       if (expr__parse(&val, ctx, &e))
+       if (expr__parse(&val, ctx, e))
                TEST_ASSERT_VAL("parse test failed", 0);
        TEST_ASSERT_VAL("unexpected value", val == val2);
        return 0;
@@ -44,11 +44,11 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused)
                return ret;
 
        p = "FOO/0";
-       ret = expr__parse(&val, &ctx, &p);
+       ret = expr__parse(&val, &ctx, p);
        TEST_ASSERT_VAL("division by zero", ret == 1);
 
        p = "BAR/";
-       ret = expr__parse(&val, &ctx, &p);
+       ret = expr__parse(&val, &ctx, p);
        TEST_ASSERT_VAL("missing operand", ret == 1);
 
        TEST_ASSERT_VAL("find other",

diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
index b39fd39..45b2553 100644 (file)
--- a/tools/perf/util/expr.c
+++ b/tools/perf/util/expr.c
@@ -52,9 +52,9 @@ __expr__parse(double *val, struct parse_ctx *ctx, const char *expr,
        return ret;
 }
 
-int expr__parse(double *final_val, struct parse_ctx *ctx, const char **pp)
+int expr__parse(double *final_val, struct parse_ctx *ctx, const char *expr)
 {
-       return __expr__parse(final_val, ctx, *pp, EXPR_PARSE);
+       return __expr__parse(final_val, ctx, expr, EXPR_PARSE);
 }
 
 static bool
@@ -71,14 +71,14 @@ already_seen(const char *val, const char *one, const char **other,
        return false;
 }
 
-int expr__find_other(const char *p, const char *one, const char ***other,
+int expr__find_other(const char *expr, const char *one, const char ***other,
                     int *num_other)
 {
        int err, i = 0, j = 0;
        struct parse_ctx ctx;
 
        expr__ctx_init(&ctx);
-       err = __expr__parse(NULL, &ctx, p, EXPR_OTHER);
+       err = __expr__parse(NULL, &ctx, expr, EXPR_OTHER);
        if (err)
                return -1;
 

diff --git a/tools/perf/util/expr.h b/tools/perf/util/expr.h
index df0a17d..9377538 100644 (file)
--- a/tools/perf/util/expr.h
+++ b/tools/perf/util/expr.h
@@ -17,8 +17,8 @@ struct parse_ctx {
 
 void expr__ctx_init(struct parse_ctx *ctx);
 void expr__add_id(struct parse_ctx *ctx, const char *id, double val);
-int expr__parse(double *final_val, struct parse_ctx *ctx, const char **pp);
-int expr__find_other(const char *p, const char *one, const char ***other,
+int expr__parse(double *final_val, struct parse_ctx *ctx, const char *expr);
+int expr__find_other(const char *expr, const char *one, const char ***other,
                int *num_other);
 
 #endif

diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 90d23cc..0fd713d 100644 (file)
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -777,9 +777,7 @@ static void generic_metric(struct perf_stat_config *config,
        }
 
        if (!metric_events[i]) {
-               const char *p = metric_expr;
-
-               if (expr__parse(&ratio, &pctx, &p) == 0) {
+               if (expr__parse(&ratio, &pctx, metric_expr) == 0) {
                        char *unit;
                        char metric_bf[64];