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perf probe: Introduce quotation marks support

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In non-C languages, it is possible to have ':' in the function names.

It is possible to escape it with backslashes, but if there are too many
backslashes, it is annoying.

This introduce quotation marks (`"` or `'`) support.

For example, without quotes, we have to pass it as below

  $ perf probe -x cro3 -L "cro3\:\:cmd\:\:servo\:\:run_show"
  <run_show@/work/cro3/src/cmd/servo.rs:0>
        0  fn run_show(args: &ArgsShow) -> Result<()> {
        1      let list = ServoList::discover()?;
        2      let s = list.find_by_serial(&args.servo)?;
        3      if args.json {
        4          println!("{s}");

With quotes, we can more naturally write the function name as below;

  $ perf probe -x cro3 -L \"cro3::cmd::servo::run_show\"
  <run_show@/work/cro3/src/cmd/servo.rs:0>
        0  fn run_show(args: &ArgsShow) -> Result<()> {
        1      let list = ServoList::discover()?;
        2      let s = list.find_by_serial(&args.servo)?;
        3      if args.json {
        4          println!("{s}");

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Lobakin <aleksander.lobakin@intel.com>
Cc: Dima Kogan <dima@secretsauce.net>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Link: https://lore.kernel.org/r/173099116941.2431889.11609129616090100386.stgit@mhiramat.roam.corp.google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Masami Hiramatsu (Google) 2024-11-07 23:52:49 +09:00 committed by Arnaldo Carvalho de Melo
parent 313026f3ce
commit 080e47b2a2
1 changed files with 41 additions and 34 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

75
tools/perf/util/probe-event.c
View file

@ -1079,6 +1079,7 @@ static int __show_line_range(struct line_range *lr, const char *module,
ret = debuginfo__find_line_range(dinfo, lr);
if (!ret) { /* Not found, retry with an alternative */
pr_debug2("Failed to find line range in debuginfo. Fallback to alternative\n");
ret = get_alternative_line_range(dinfo, lr, module, user);
if (!ret)
ret = debuginfo__find_line_range(dinfo, lr);
@ -1362,30 +1363,37 @@ static bool is_c_func_name(const char *name)
* FNC[@SRC][:SLN[+NUM|-ELN]]
*
* FNC@SRC accepts `FNC@*` which forcibly specify FNC as function name.
* SRC and FUNC can be quoted by double/single quotes.
*/
int parse_line_range_desc(const char *arg, struct line_range *lr)
{
char *range, *file, *name = strdup(arg);
char *buf = strdup(arg);
char *p;
int err;
if (!name)
if (!buf)
return -ENOMEM;
lr->start = 0;
lr->end = INT_MAX;
range = strpbrk_esc(name, ":");
if (range) {
*range++ = '\0';
p = strpbrk_esq(buf, ":");
if (p) {
if (p == buf) {
semantic_error("No file/function name in '%s'.\n", p);
err = -EINVAL;
goto err;
}
*(p++) = '\0';
err = parse_line_num(&range, &lr->start, "start line");
err = parse_line_num(&p, &lr->start, "start line");
if (err)
goto err;
if (*range == '+' || *range == '-') {
const char c = *range++;
if (*p == '+' || *p == '-') {
const char c = *(p++);
err = parse_line_num(&range, &lr->end, "end line");
err = parse_line_num(&p, &lr->end, "end line");
if (err)
goto err;
@ -1409,42 +1417,41 @@ int parse_line_range_desc(const char *arg, struct line_range *lr)
" than end line.\n");
goto err;
}
if (*range != '\0') {
semantic_error("Tailing with invalid str '%s'.\n", range);
if (*p != '\0') {
semantic_error("Tailing with invalid str '%s'.\n", p);
goto err;
}
}
file = strpbrk_esc(name, "@");
if (file) {
*file++ = '\0';
if (strcmp(file, "*")) {
lr->file = strdup_esc(file);
p = strpbrk_esq(buf, "@");
if (p) {
*p++ = '\0';
if (strcmp(p, "*")) {
lr->file = strdup_esq(p);
if (lr->file == NULL) {
err = -ENOMEM;
goto err;
}
}
if (*name != '\0')
lr->function = name;
if (*buf != '\0')
lr->function = strdup_esq(buf);
if (!lr->function && !lr->file) {
semantic_error("Only '@*' is not allowed.\n");
err = -EINVAL;
goto err;
}
} else if (strpbrk_esc(name, "/."))
lr->file = name;
else if (is_c_func_name(name))/* We reuse it for checking funcname */
lr->function = name;
} else if (strpbrk_esq(buf, "/."))
lr->file = strdup_esq(buf);
else if (is_c_func_name(buf))/* We reuse it for checking funcname */
lr->function = strdup_esq(buf);
else { /* Invalid name */
semantic_error("'%s' is not a valid function name.\n", name);
semantic_error("'%s' is not a valid function name.\n", buf);
err = -EINVAL;
goto err;
}
return 0;
err:
free(name);
free(buf);
return err;
}
@ -1452,19 +1459,19 @@ static int parse_perf_probe_event_name(char **arg, struct perf_probe_event *pev)
{
char *ptr;
ptr = strpbrk_esc(*arg, ":");
ptr = strpbrk_esq(*arg, ":");
if (ptr) {
*ptr = '\0';
if (!pev->sdt && !is_c_func_name(*arg))
goto ng_name;
pev->group = strdup_esc(*arg);
pev->group = strdup_esq(*arg);
if (!pev->group)
return -ENOMEM;
*arg = ptr + 1;
} else
pev->group = NULL;
pev->event = strdup_esc(*arg);
pev->event = strdup_esq(*arg);
if (pev->event == NULL)
return -ENOMEM;
@ -1503,7 +1510,7 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
arg++;
}
ptr = strpbrk_esc(arg, ";=@+%");
ptr = strpbrk_esq(arg, ";=@+%");
if (pev->sdt) {
if (ptr) {
if (*ptr != '@') {
@ -1517,7 +1524,7 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
pev->target = build_id_cache__origname(tmp);
free(tmp);
} else
pev->target = strdup_esc(ptr + 1);
pev->target = strdup_esq(ptr + 1);
if (!pev->target)
return -ENOMEM;
*ptr = '\0';
@ -1558,7 +1565,7 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
file_spec = true;
}
ptr = strpbrk_esc(arg, ";:+@%");
ptr = strpbrk_esq(arg, ";:+@%");
if (ptr) {
nc = *ptr;
*ptr++ = '\0';
@ -1567,7 +1574,7 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
if (arg[0] == '\0')
tmp = NULL;
else {
tmp = strdup_esc(arg);
tmp = strdup_esq(arg);
if (tmp == NULL)
return -ENOMEM;
}
@ -1605,7 +1612,7 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
return -ENOMEM;
break;
}
ptr = strpbrk_esc(arg, ";:+@%");
ptr = strpbrk_esq(arg, ";:+@%");
if (ptr) {
nc = *ptr;
*ptr++ = '\0';
@ -1634,7 +1641,7 @@ static int parse_perf_probe_point(char *arg, struct perf_probe_event *pev)
}
if (!strcmp(arg, "*"))
break;
pp->file = strdup_esc(arg);
pp->file = strdup_esq(arg);
if (pp->file == NULL)
return -ENOMEM;
break;