diff options
author | Adrian Hunter <adrian.hunter@intel.com> | 2022-07-11 12:32:05 +0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-07-20 17:08:37 +0300 |
commit | a5367ecb5353fbf28bfd3979fc4f61ddebec80b1 (patch) | |
tree | eed8b8c2b6de100c6c798a4b70e19d469bd0ffe8 /tools/perf/util/data.c | |
parent | 65691e9ff0c90109dd7d9d495d9528ad4c1b82d4 (diff) | |
download | linux-a5367ecb5353fbf28bfd3979fc4f61ddebec80b1.tar.xz |
perf tools: Automatically use guest kcore_dir if present
When registering a guest machine using machine_pid from the id index,
check perf.data for a matching kcore_dir subdirectory and set the
kallsyms file name accordingly. If set, use it to find the machine's
kernel symbols and object code (from kcore).
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: kvm@vger.kernel.org
Link: https://lore.kernel.org/r/20220711093218.10967-23-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/data.c')
-rw-r--r-- | tools/perf/util/data.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c index 9782ccbe595d..a7f68c309545 100644 --- a/tools/perf/util/data.c +++ b/tools/perf/util/data.c @@ -518,6 +518,25 @@ char *perf_data__kallsyms_name(struct perf_data *data) return kallsyms_name; } +char *perf_data__guest_kallsyms_name(struct perf_data *data, pid_t machine_pid) +{ + char *kallsyms_name; + struct stat st; + + if (!data->is_dir) + return NULL; + + if (asprintf(&kallsyms_name, "%s/kcore_dir__%d/kallsyms", data->path, machine_pid) < 0) + return NULL; + + if (stat(kallsyms_name, &st)) { + free(kallsyms_name); + return NULL; + } + + return kallsyms_name; +} + bool is_perf_data(const char *path) { bool ret = false; |