perf script: Add Instruction Tracing support

Add support for decoding an AUX area assuming it contains instruction
tracing data.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-17-git-send-email-adrian.hunter@intel.com
[ Do not use -Z as an alternative to --itrace ]
[ Fixed initialization of itrace_synth_opts struct fields on older gcc versions ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 38 insertions, 0 deletions

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 79445750fcb3..05df64804def 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -221,6 +221,33 @@ OPTIONS
 --header-only
         Show only perf.data header.
 
+--itrace::
+        Options for decoding instruction tracing data. The options are:
+
+                i       synthesize instructions events
+                b       synthesize branches events
+                c       synthesize branches events (calls only)
+                r       synthesize branches events (returns only)
+                e       synthesize error events
+                d       create a debug log
+                g       synthesize a call chain for instructions events
+
+        The default is all events i.e. the same as --itrace=ibe
+
+        In addition, the period (default 100000) for instructions events
+        can be specified in units of:
+
+                i       instructions
+                t       ticks
+                ms      milliseconds
+                us      microseconds
+                ns      nanoseconds (default)
+
+        Also the call chain size (default 16, max. 1024) for instructions
+        events can be specified.
+
+        To disable decoding entirely, use --no-itrace.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-script-perl[1],
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 58f10b8e6ff2..7682665456fe 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -16,6 +16,7 @@
 #include "util/evsel.h"
 #include "util/sort.h"
 #include "util/data.h"
+#include "util/auxtrace.h"
 #include <linux/bitmap.h>
 
 static char const               *script_name;
@@ -1497,6 +1498,7 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
         char *rec_script_path = NULL;
         char *rep_script_path = NULL;
         struct perf_session *session;
+        struct itrace_synth_opts itrace_synth_opts = { .set = false, };
         char *script_path = NULL;
         const char **__argv;
         int i, j, err = 0;
@@ -1511,6 +1513,10 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
                         .attr            = process_attr,
                         .tracing_data    = perf_event__process_tracing_data,
                         .build_id        = perf_event__process_build_id,
+                        .id_index        = perf_event__process_id_index,
+                        .auxtrace_info   = perf_event__process_auxtrace_info,
+                        .auxtrace        = perf_event__process_auxtrace,
+                        .auxtrace_error  = perf_event__process_auxtrace_error,
                         .ordered_events  = true,
                         .ordering_requires_timestamps = true,
                 },
@@ -1570,6 +1576,9 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
         OPT_BOOLEAN('\0', "show-mmap-events", &script.show_mmap_events,
                     "Show the mmap events"),
         OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
+        OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
+                            "Instruction Tracing options",
+                            itrace_parse_synth_opts),
         OPT_END()
         };
         const char * const script_subcommands[] = { "record", "report", NULL };
@@ -1765,6 +1774,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
 
         script.session = session;
 
+        session->itrace_synth_opts = &itrace_synth_opts;
+
         if (cpu_list) {
                 err = perf_session__cpu_bitmap(session, cpu_list, cpu_bitmap);
                 if (err < 0)