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perf disassemble: Extract logic to find file to pass to objdump to a separate function

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Disentangling this a bit further, more to come.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-7bjv2xazuyzs0xw01mlwosn5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2016-08-09 15:32:53 -03:00
parent 3caee094d1
commit 05ed3ac941
1 changed files with 38 additions and 28 deletions
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66
tools/perf/util/annotate.c
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@ -1162,10 +1162,44 @@ int symbol__strerror_disassemble(struct symbol *sym __maybe_unused, struct map *
return 0;
}
static int dso__disassemble_filename(struct dso *dso, char *filename, size_t filename_size)
{
char linkname[PATH_MAX];
char *build_id_filename;
if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
!dso__is_kcore(dso))
return SYMBOL_ANNOTATE_ERRNO__NO_VMLINUX;
build_id_filename = dso__build_id_filename(dso, NULL, 0);
if (build_id_filename) {
__symbol__join_symfs(filename, filename_size, build_id_filename);
free(build_id_filename);
} else {
if (dso->has_build_id)
return ENOMEM;
goto fallback;
}
if (dso__is_kcore(dso) ||
readlink(filename, linkname, sizeof(linkname)) < 0 ||
strstr(linkname, DSO__NAME_KALLSYMS) ||
access(filename, R_OK)) {
fallback:
/*
* If we don't have build-ids or the build-id file isn't in the
* cache, or is just a kallsyms file, well, lets hope that this
* DSO is the same as when 'perf record' ran.
*/
__symbol__join_symfs(filename, filename_size, dso->long_name);
}
return 0;
}
int symbol__disassemble(struct symbol *sym, struct map *map, size_t privsize)
{
struct dso *dso = map->dso;
char *filename;
char command[PATH_MAX * 2];
FILE *file;
char symfs_filename[PATH_MAX];
@ -1175,34 +1209,10 @@ int symbol__disassemble(struct symbol *sym, struct map *map, size_t privsize)
int lineno = 0;
int nline;
pid_t pid;
int err = SYMBOL_ANNOTATE_ERRNO__NO_VMLINUX;
int err = dso__disassemble_filename(dso, symfs_filename, sizeof(symfs_filename));
if (dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
!dso__is_kcore(dso))
goto out;
filename = dso__build_id_filename(dso, NULL, 0);
if (filename) {
symbol__join_symfs(symfs_filename, filename);
free(filename);
} else {
if (dso->has_build_id)
return ENOMEM;
goto fallback;
}
if (dso__is_kcore(dso) ||
readlink(symfs_filename, command, sizeof(command)) < 0 ||
strstr(command, DSO__NAME_KALLSYMS) ||
access(symfs_filename, R_OK)) {
fallback:
/*
* If we don't have build-ids or the build-id file isn't in the
* cache, or is just a kallsyms file, well, lets hope that this
* DSO is the same as when 'perf record' ran.
*/
symbol__join_symfs(symfs_filename, dso->long_name);
}
if (err)
return err;
pr_debug("%s: filename=%s, sym=%s, start=%#" PRIx64 ", end=%#" PRIx64 "\n", __func__,
symfs_filename, sym->name, map->unmap_ip(map, sym->start),