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| author | Adrian Hunter <adrian.hunter@intel.com> | 2022-07-11 12:32:12 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-07-20 11:08:46 -0300 |
| commit | 12374a16223aff68ba85727da0fa4297e6b9ee97 (patch) | |
| tree | b6ce5f22cce6cf965714b086e658dfb7f95a397f /tools/perf/util/intel-pt.c | |
| parent | 7c0b20d13f329f916b742ea3edaf6a685efa5c72 (diff) | |
| download | linux-stable-12374a16223aff68ba85727da0fa4297e6b9ee97.tar.gz linux-stable-12374a16223aff68ba85727da0fa4297e6b9ee97.tar.bz2 linux-stable-12374a16223aff68ba85727da0fa4297e6b9ee97.zip | |
perf intel-pt: Add some more logging to intel_pt_walk_next_insn()
To aid debugging, add some more logging to intel_pt_walk_next_insn().
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: kvm@vger.kernel.org
Link: https://lore.kernel.org/r/20220711093218.10967-30-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/intel-pt.c')
| -rw-r--r-- | tools/perf/util/intel-pt.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index 014f9f73cc49..a8798b5bb311 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -758,27 +758,38 @@ static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn, if (nr) { if ((!symbol_conf.guest_code && cpumode != PERF_RECORD_MISC_GUEST_KERNEL) || - intel_pt_get_guest(ptq)) + intel_pt_get_guest(ptq)) { + intel_pt_log("ERROR: no guest machine\n"); return -EINVAL; + } machine = ptq->guest_machine; thread = ptq->guest_thread; if (!thread) { - if (cpumode != PERF_RECORD_MISC_GUEST_KERNEL) + if (cpumode != PERF_RECORD_MISC_GUEST_KERNEL) { + intel_pt_log("ERROR: no guest thread\n"); return -EINVAL; + } thread = ptq->unknown_guest_thread; } } else { thread = ptq->thread; if (!thread) { - if (cpumode != PERF_RECORD_MISC_KERNEL) + if (cpumode != PERF_RECORD_MISC_KERNEL) { + intel_pt_log("ERROR: no thread\n"); return -EINVAL; + } thread = ptq->pt->unknown_thread; } } while (1) { - if (!thread__find_map(thread, cpumode, *ip, &al) || !al.map->dso) + if (!thread__find_map(thread, cpumode, *ip, &al) || !al.map->dso) { + if (al.map) + intel_pt_log("ERROR: thread has no dso for %#" PRIx64 "\n", *ip); + else + intel_pt_log("ERROR: thread has no map for %#" PRIx64 "\n", *ip); return -EINVAL; + } if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR && dso__data_status_seen(al.map->dso, @@ -819,8 +830,12 @@ static int intel_pt_walk_next_insn(struct intel_pt_insn *intel_pt_insn, len = dso__data_read_offset(al.map->dso, machine, offset, buf, INTEL_PT_INSN_BUF_SZ); - if (len <= 0) + if (len <= 0) { + intel_pt_log("ERROR: failed to read at %" PRIu64 " ", offset); + if (intel_pt_enable_logging) + dso__fprintf(al.map->dso, intel_pt_log_fp()); return -EINVAL; + } if (intel_pt_get_insn(buf, len, x86_64, intel_pt_insn)) return -EINVAL; |