[PATCH v2 08/16] perf script: Move script_spec code to trace-event-scripting.c

Ian Rogers
2024-10-16T04:24:54Z

The script_spec code is referenced in util/trace-event-scripting but
the list was in builtin-script, accessed via a function that required
a stub function in python.c. Move all the logic to
trace-event-scripting, with lookup and foreach functions exposed for
builtin-script's benefit.

Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/builtin-script.c | 67 +---------------------
tools/perf/util/python.c | 5 --
tools/perf/util/trace-event-scripting.c | 75 +++++++++++++++++++++++++
tools/perf/util/trace-event.h | 3 +-
4 files changed, 80 insertions(+), 70 deletions(-)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 1ce7b71f1f46..b838470657d4 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -2955,79 +2955,18 @@ static int __cmd_script(struct perf_script *script)
return ret;
}

-struct script_spec {
- struct list_head node;
- struct scripting_ops *ops;
- char spec[];
-};
-
-static LIST_HEAD(script_specs);
-
-static struct script_spec *script_spec__new(const char *spec,
- struct scripting_ops *ops)
+static int list_available_languages_cb(struct scripting_ops *ops, const char *spec)
{
- struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
-
- if (s != NULL) {
- strcpy(s->spec, spec);
- s->ops = ops;
- }
-
- return s;
-}
-
-static void script_spec__add(struct script_spec *s)
-{
- list_add_tail(&s->node, &script_specs);
-}
-
-static struct script_spec *script_spec__find(const char *spec)
-{
- struct script_spec *s;
-
- list_for_each_entry(s, &script_specs, node)
- if (strcasecmp(s->spec, spec) == 0)
- return s;
- return NULL;
-}
-
-int script_spec_register(const char *spec, struct scripting_ops *ops)
-{
- struct script_spec *s;
-
- s = script_spec__find(spec);
- if (s)
- return -1;
-
- s = script_spec__new(spec, ops);
- if (!s)
- return -1;
- else
- script_spec__add(s);
-
+ fprintf(stderr, " %-42s [%s]\n", spec, ops->name);
return 0;
}

-static struct scripting_ops *script_spec__lookup(const char *spec)
-{
- struct script_spec *s = script_spec__find(spec);
- if (!s)
- return NULL;
-
- return s->ops;
-}
-
static void list_available_languages(void)
{
- struct script_spec *s;
-
fprintf(stderr, "\n");
fprintf(stderr, "Scripting language extensions (used in "
"perf script -s [spec:]script.[spec]):\n\n");
-
- list_for_each_entry(s, &script_specs, node)
- fprintf(stderr, " %-42s [%s]\n", s->spec, s->ops->name);
-
+ script_spec__for_each(&list_available_languages_cb);
fprintf(stderr, "\n");
}

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 0fa8e27769be..3d938fe2de6a 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -1305,11 +1305,6 @@ PyMODINIT_FUNC PyInit_perf(void)
/* The following are stubs to avoid dragging in builtin-* objects. */
/* TODO: move the code out of the builtin-* file into util. */

-int script_spec_register(const char *spec __maybe_unused, struct scripting_ops *ops __maybe_unused)
-{
- return -1;
-}
-
arch_syscalls__strerrno_t *arch_syscalls__strerrno_function(const char *arch __maybe_unused)
{
return NULL;
diff --git a/tools/perf/util/trace-event-scripting.c b/tools/perf/util/trace-event-scripting.c
index 8abb7a7b6888..ad62d8e5a368 100644
--- a/tools/perf/util/trace-event-scripting.c
+++ b/tools/perf/util/trace-event-scripting.c
@@ -24,6 +24,81 @@ unsigned int scripting_max_stack = PERF_MAX_STACK_DEPTH;

struct scripting_context *scripting_context;

+struct script_spec {
+ struct list_head node;
+ struct scripting_ops *ops;
+ char spec[];
+};
+
+static LIST_HEAD(script_specs);
+
+static struct script_spec *script_spec__new(const char *spec,
+ struct scripting_ops *ops)
+{
+ struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
+
+ if (s != NULL) {
+ strcpy(s->spec, spec);
+ s->ops = ops;
+ }
+
+ return s;
+}
+
+static void script_spec__add(struct script_spec *s)
+{
+ list_add_tail(&s->node, &script_specs);
+}
+
+static struct script_spec *script_spec__find(const char *spec)
+{
+ struct script_spec *s;
+
+ list_for_each_entry(s, &script_specs, node)
+ if (strcasecmp(s->spec, spec) == 0)
+ return s;
+ return NULL;
+}
+
+static int script_spec_register(const char *spec, struct scripting_ops *ops)
+{
+ struct script_spec *s;
+
+ s = script_spec__find(spec);
+ if (s)
+ return -1;
+
+ s = script_spec__new(spec, ops);
+ if (!s)
+ return -1;
+
+ script_spec__add(s);
+ return 0;
+}
+
+struct scripting_ops *script_spec__lookup(const char *spec)
+{
+ struct script_spec *s = script_spec__find(spec);
+
+ if (!s)
+ return NULL;
+
+ return s->ops;
+}
+
+int script_spec__for_each(int (*cb)(struct scripting_ops *ops, const char *spec))
+{
+ struct script_spec *s;
+ int ret = 0;
+
+ list_for_each_entry(s, &script_specs, node) {
+ ret = cb(s->ops, s->spec);
+ if (ret)
+ break;
+ }
+ return ret;
+}
+
void scripting_context__update(struct scripting_context *c,
union perf_event *event,
struct perf_sample *sample,
diff --git a/tools/perf/util/trace-event.h b/tools/perf/util/trace-event.h
index bbf8b26bc8da..81fceaf297ba 100644
--- a/tools/perf/util/trace-event.h
+++ b/tools/perf/util/trace-event.h
@@ -116,7 +116,8 @@ struct scripting_ops {

extern unsigned int scripting_max_stack;

-int script_spec_register(const char *spec, struct scripting_ops *ops);
+struct scripting_ops *script_spec__lookup(const char *spec);
+int script_spec__for_each(int (*cb)(struct scripting_ops *ops, const char *spec));

void script_fetch_insn(struct perf_sample *sample, struct thread *thread,
struct machine *machine);
--
2.47.0.rc1.288.g06298d1525-goog