From 2b9e32c47fd3edb0373067de7a151775b0e005c2 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Fri, 23 Sep 2016 17:38:46 +0300 Subject: [PATCH] perf intel-pt: Read address filter from AUXTRACE_INFO event Read the address filter from the AUXTRACE_INFO event in preparation for using it to assist in decoding. Signed-off-by: Adrian Hunter Cc: Jiri Olsa Cc: Masami Hiramatsu Cc: Mathieu Poirier Link: http://lkml.kernel.org/r/1474641528-18776-15-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/intel-pt.c | 51 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c index f16b00f55a19..c9fec19a7914 100644 --- a/tools/perf/util/intel-pt.c +++ b/tools/perf/util/intel-pt.c @@ -103,6 +103,8 @@ struct intel_pt { unsigned max_non_turbo_ratio; unsigned long num_events; + + char *filter; }; enum switch_state { @@ -1774,6 +1776,7 @@ static void intel_pt_free(struct perf_session *session) intel_pt_free_events(session); session->auxtrace = NULL; thread__put(pt->unknown_thread); + zfree(&pt->filter); free(pt); } @@ -2024,6 +2027,7 @@ static const char * const intel_pt_info_fmts[] = { [INTEL_PT_TSC_CTC_D] = " TSC:CTC denominator %"PRIu64"\n", [INTEL_PT_CYC_BIT] = " CYC bit %#"PRIx64"\n", [INTEL_PT_MAX_NONTURBO_RATIO] = " Max non-turbo ratio %"PRIu64"\n", + [INTEL_PT_FILTER_STR_LEN] = " Filter string len. %"PRIu64"\n", }; static void intel_pt_print_info(u64 *arr, int start, int finish) @@ -2037,6 +2041,14 @@ static void intel_pt_print_info(u64 *arr, int start, int finish) fprintf(stdout, intel_pt_info_fmts[i], arr[i]); } +static void intel_pt_print_info_str(const char *name, const char *str) +{ + if (!dump_trace) + return; + + fprintf(stdout, " %-20s%s\n", name, str ? str : ""); +} + static bool intel_pt_has(struct auxtrace_info_event *auxtrace_info, int pos) { return auxtrace_info->header.size >= @@ -2049,6 +2061,8 @@ int intel_pt_process_auxtrace_info(union perf_event *event, struct auxtrace_info_event *auxtrace_info = &event->auxtrace_info; size_t min_sz = sizeof(u64) * INTEL_PT_PER_CPU_MMAPS; struct intel_pt *pt; + void *info_end; + u64 *info; int err; if (auxtrace_info->header.size < sizeof(struct auxtrace_info_event) + @@ -2101,6 +2115,42 @@ int intel_pt_process_auxtrace_info(union perf_event *event, INTEL_PT_MAX_NONTURBO_RATIO); } + info = &auxtrace_info->priv[INTEL_PT_FILTER_STR_LEN] + 1; + info_end = (void *)info + auxtrace_info->header.size; + + if (intel_pt_has(auxtrace_info, INTEL_PT_FILTER_STR_LEN)) { + size_t len; + + len = auxtrace_info->priv[INTEL_PT_FILTER_STR_LEN]; + intel_pt_print_info(&auxtrace_info->priv[0], + INTEL_PT_FILTER_STR_LEN, + INTEL_PT_FILTER_STR_LEN); + if (len) { + const char *filter = (const char *)info; + + len = roundup(len + 1, 8); + info += len >> 3; + if ((void *)info > info_end) { + pr_err("%s: bad filter string length\n", __func__); + err = -EINVAL; + goto err_free_queues; + } + pt->filter = memdup(filter, len); + if (!pt->filter) { + err = -ENOMEM; + goto err_free_queues; + } + if (session->header.needs_swap) + mem_bswap_64(pt->filter, len); + if (pt->filter[len - 1]) { + pr_err("%s: filter string not null terminated\n", __func__); + err = -EINVAL; + goto err_free_queues; + } + } + intel_pt_print_info_str("Filter string", pt->filter); + } + pt->timeless_decoding = intel_pt_timeless_decoding(pt); pt->have_tsc = intel_pt_have_tsc(pt); pt->sampling_mode = false; @@ -2218,6 +2268,7 @@ int intel_pt_process_auxtrace_info(union perf_event *event, auxtrace_queues__free(&pt->queues); session->auxtrace = NULL; err_free: + zfree(&pt->filter); free(pt); return err; } -- 2.45.2