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perf intel-pt: Read address filter from AUXTRACE_INFO event

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Read the address filter from the AUXTRACE_INFO event in preparation for
using it to assist in decoding.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: http://lkml.kernel.org/r/1474641528-18776-15-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2016-09-23 17:38:46 +03:00 committed by Arnaldo Carvalho de Melo
parent c093f308ce
commit 2b9e32c47f
1 changed files with 51 additions and 0 deletions
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51
tools/perf/util/intel-pt.c
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@ -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 @@ err_free_queues:
auxtrace_queues__free(&pt->queues);
session->auxtrace = NULL;
err_free:
zfree(&pt->filter);
free(pt);
return err;
}