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perf report: Refactor common code in srcline.c

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Introduce dso__name() and filename_split() out of existing code because
these codes will be used in several places in next patch.

For filename_split(), it may also solve a potential memory leak in
existing code. In existing addr2line(),

        sep = strchr(filename, ':');
        if (sep) {
                *sep++ = '\0';
                *file = filename;
                *line_nr = strtoul(sep, NULL, 0);
                ret = 1;
        }

out:
        pclose(fp);
        return ret;

If sep is NULL, filename is not freed or returned via file.

Signed-off-by: Yao Jin <yao.jin@linux.intel.com>
Tested-by: Milian Wolff <milian.wolff@kdab.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Link: http://lkml.kernel.org/r/1490474069-15823-2-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao 2017-03-26 04:34:25 +08:00 committed by Arnaldo Carvalho de Melo
parent b0ad8ea664
commit 5580338d0f
1 changed files with 45 additions and 23 deletions
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68
tools/perf/util/srcline.c
View File

@ -12,6 +12,24 @@
bool srcline_full_filename;
static const char *dso__name(struct dso *dso)
{
const char *dso_name;
if (dso->symsrc_filename)
dso_name = dso->symsrc_filename;
else
dso_name = dso->long_name;
if (dso_name[0] == '[')
return NULL;
if (!strncmp(dso_name, "/tmp/perf-", 10))
return NULL;
return dso_name;
}
#ifdef HAVE_LIBBFD_SUPPORT
/*
@ -207,6 +225,27 @@ void dso__free_a2l(struct dso *dso)
#else /* HAVE_LIBBFD_SUPPORT */
static int filename_split(char *filename, unsigned int *line_nr)
{
char *sep;
sep = strchr(filename, '\n');
if (sep)
*sep = '\0';
if (!strcmp(filename, "??:0"))
return 0;
sep = strchr(filename, ':');
if (sep) {
*sep++ = '\0';
*line_nr = strtoul(sep, NULL, 0);
return 1;
}
return 0;
}
static int addr2line(const char *dso_name, u64 addr,
char **file, unsigned int *line_nr,
struct dso *dso __maybe_unused,
@ -216,7 +255,6 @@ static int addr2line(const char *dso_name, u64 addr,
char cmd[PATH_MAX];
char *filename = NULL;
size_t len;
char *sep;
int ret = 0;
scnprintf(cmd, sizeof(cmd), "addr2line -e %s %016"PRIx64,
@ -233,23 +271,14 @@ static int addr2line(const char *dso_name, u64 addr,
goto out;
}
sep = strchr(filename, '\n');
if (sep)
*sep = '\0';
if (!strcmp(filename, "??:0")) {
pr_debug("no debugging info in %s\n", dso_name);
ret = filename_split(filename, line_nr);
if (ret != 1) {
free(filename);
goto out;
}
sep = strchr(filename, ':');
if (sep) {
*sep++ = '\0';
*file = filename;
*line_nr = strtoul(sep, NULL, 0);
ret = 1;
}
*file = filename;
out:
pclose(fp);
return ret;
@ -278,15 +307,8 @@ char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
if (!dso->has_srcline)
goto out;
if (dso->symsrc_filename)
dso_name = dso->symsrc_filename;
else
dso_name = dso->long_name;
if (dso_name[0] == '[')
goto out;
if (!strncmp(dso_name, "/tmp/perf-", 10))
dso_name = dso__name(dso);
if (dso_name == NULL)
goto out;
if (!addr2line(dso_name, addr, &file, &line, dso, unwind_inlines))