perf script: Add support for dumping symbols

Add option to dump symbols found in events.

e.g., perf script -f comm,pid,tid,time,trace,sym

swapper     0/0       537.037184: prev_comm=swapper prev_pid=0 prev_prio=120...
        ffffffff81030350 perf_trace_sched_switch ([kernel.kallsyms])
        ffffffff81382ac5 schedule ([kernel.kallsyms])
        ffffffff8100134a cpu_idle ([kernel.kallsyms])
        ffffffff81370b39 rest_init ([kernel.kallsyms])
        ffffffff81696c23 start_kernel ([kernel.kallsyms].init.text)
        ffffffff816962af x86_64_start_reservations ([kernel.kallsyms].init.text)
        ffffffff816963b9 x86_64_start_kernel ([kernel.kallsyms].init.text)

sshd  1675/1675    537.037309: prev_comm=sshd prev_pid=1675 prev_prio=120...
        ffffffff81030350 perf_trace_sched_switch ([kernel.kallsyms])
        ffffffff81382ac5 schedule ([kernel.kallsyms])
        ffffffff813837aa schedule_hrtimeout_range_clock ([kernel.kallsyms])
        ffffffff81383886 schedule_hrtimeout_range ([kernel.kallsyms])
        ffffffff8110c4f9 poll_schedule_timeout ([kernel.kallsyms])
        ffffffff8110cd20 do_select ([kernel.kallsyms])
        ffffffff8110ced8 core_sys_select ([kernel.kallsyms])
        ffffffff8110d00d sys_select ([kernel.kallsyms])
        ffffffff81002bc2 system_call ([kernel.kallsyms])
            7f1647e56e93 __GI_select (/lib64/libc-2.12.90.so)

netstat  1692/1692    537.038664: prev_comm=netstat prev_pid=1692 prev_prio=...
        ffffffff81030350 perf_trace_sched_switch ([kernel.kallsyms])
        ffffffff81382ac5 schedule ([kernel.kallsyms])
        ffffffff81002c3a sysret_careful ([kernel.kallsyms])
            7f7a6cd1b210 __GI___libc_read (/lib64/libc-2.12.90.so)

Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <1299734608-5223-6-git-send-email-daahern@cisco.com>
Signed-off-by: David Ahern <daahern@cisco.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

4 files changed, 110 insertions, 2 deletions

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index b73cf589c109..c64118a4de49 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -115,7 +115,21 @@ OPTIONS
 -f::
 --fields
         Comma separated list of fields to print. Options are:
-        comm, tid, pid, time, cpu, event, trace
+        comm, tid, pid, time, cpu, event, trace, sym
+
+-k::
+--vmlinux=<file>::
+        vmlinux pathname
+
+--kallsyms=<file>::
+        kallsyms pathname
+
+--symfs=<directory>::
+        Look for files with symbols relative to this directory.
+
+-G::
+--hide-call-graph::
+        When printing symbols do not display call chain.
 
 SEE ALSO
 --------
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index c046e6e8600a..b45b09c13f7a 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -19,6 +19,7 @@ static bool			debug_mode;
 static u64                      last_timestamp;
 static u64                      nr_unordered;
 extern const struct option      record_options[];
+static bool                     no_callchain;
 
 enum perf_output_field {
         PERF_OUTPUT_COMM            = 1U << 0,
@@ -28,6 +29,7 @@ enum perf_output_field {
         PERF_OUTPUT_CPU             = 1U << 4,
         PERF_OUTPUT_EVNAME          = 1U << 5,
         PERF_OUTPUT_TRACE           = 1U << 6,
+        PERF_OUTPUT_SYM             = 1U << 7,
 };
 
 struct output_option {
@@ -41,6 +43,7 @@ struct output_option {
         {.str = "cpu",   .field = PERF_OUTPUT_CPU},
         {.str = "event", .field = PERF_OUTPUT_EVNAME},
         {.str = "trace", .field = PERF_OUTPUT_TRACE},
+        {.str = "sym",   .field = PERF_OUTPUT_SYM},
 };
 
 /* default set to maintain compatibility with current format */
@@ -65,6 +68,8 @@ static void print_sample_start(struct perf_sample *sample,
         if (PRINT_FIELD(COMM)) {
                 if (latency_format)
                         printf("%8.8s ", thread->comm);
+                else if (PRINT_FIELD(SYM) && symbol_conf.use_callchain)
+                        printf("%s ", thread->comm);
                 else
                         printf("%16s ", thread->comm);
         }
@@ -112,6 +117,14 @@ static void process_event(union perf_event *event __unused,
                 print_trace_event(sample->cpu, sample->raw_data,
                                   sample->raw_size);
 
+        if (PRINT_FIELD(SYM)) {
+                if (!symbol_conf.use_callchain)
+                        printf(" ");
+                else
+                        printf("\n");
+                perf_session__print_symbols(event, sample, session);
+        }
+
         printf("\n");
 }
 
@@ -190,7 +203,10 @@ static int process_sample_event(union perf_event *event,
 
 static struct perf_event_ops event_ops = {
         .sample          = process_sample_event,
+        .mmap            = perf_event__process_mmap,
         .comm            = perf_event__process_comm,
+        .exit            = perf_event__process_task,
+        .fork            = perf_event__process_task,
         .attr            = perf_event__process_attr,
         .event_type      = perf_event__process_event_type,
         .tracing_data    = perf_event__process_tracing_data,
@@ -722,8 +738,16 @@ static const struct option options[] = {
                     "input file name"),
         OPT_BOOLEAN('d', "debug-mode", &debug_mode,
                    "do various checks like samples ordering and lost events"),
+        OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
+                   "file", "vmlinux pathname"),
+        OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
+                   "file", "kallsyms pathname"),
+        OPT_BOOLEAN('G', "hide-call-graph", &no_callchain,
+                    "When printing symbols do not display call chain"),
+        OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
+                    "Look for files with symbols relative to this directory"),
         OPT_CALLBACK('f', "fields", NULL, "str",
-                     "comma separated output fields. Options: comm,tid,pid,time,cpu,event,trace",
+                     "comma separated output fields. Options: comm,tid,pid,time,cpu,event,trace,sym",
                      parse_output_fields),
 
         OPT_END()
@@ -905,6 +929,11 @@ int cmd_script(int argc, const char **argv, const char *prefix __used)
         if (session == NULL)
                 return -ENOMEM;
 
+        if (!no_callchain && (session->sample_type & PERF_SAMPLE_CALLCHAIN))
+                symbol_conf.use_callchain = true;
+        else
+                symbol_conf.use_callchain = false;
+
         if (strcmp(input_name, "-") &&
             !perf_session__has_traces(session, "record -R"))
                 return -EINVAL;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index f26639fa0fb3..c68cf40764f9 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1134,3 +1134,64 @@ size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
 
         return ret;
 }
+
+void perf_session__print_symbols(union perf_event *event,
+                                struct perf_sample *sample,
+                                struct perf_session *session)
+{
+        struct addr_location al;
+        const char *symname, *dsoname;
+        struct callchain_cursor *cursor = &session->callchain_cursor;
+        struct callchain_cursor_node *node;
+
+        if (perf_event__preprocess_sample(event, session, &al, sample,
+                                          NULL) < 0) {
+                error("problem processing %d event, skipping it.\n",
+                        event->header.type);
+                return;
+        }
+
+        if (symbol_conf.use_callchain && sample->callchain) {
+
+                if (perf_session__resolve_callchain(session, al.thread,
+                                                sample->callchain, NULL) != 0) {
+                        if (verbose)
+                                error("Failed to resolve callchain. Skipping\n");
+                        return;
+                }
+                callchain_cursor_commit(cursor);
+
+                while (1) {
+                        node = callchain_cursor_current(cursor);
+                        if (!node)
+                                break;
+
+                        if (node->sym && node->sym->name)
+                                symname = node->sym->name;
+                        else
+                                symname = "";
+
+                        if (node->map && node->map->dso && node->map->dso->name)
+                                dsoname = node->map->dso->name;
+                        else
+                                dsoname = "";
+
+                        printf("\t%16" PRIx64 " %s (%s)\n", node->ip, symname, dsoname);
+
+                        callchain_cursor_advance(cursor);
+                }
+
+        } else {
+                if (al.sym && al.sym->name)
+                        symname = al.sym->name;
+                else
+                        symname = "";
+
+                if (al.map && al.map->dso && al.map->dso->name)
+                        dsoname = al.map->dso->name;
+                else
+                        dsoname = "";
+
+                printf("%16" PRIx64 " %s (%s)", al.addr, symname, dsoname);
+        }
+}
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index b5b148b0aaca..0b3c9afecaa9 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -159,4 +159,8 @@ static inline int perf_session__parse_sample(struct perf_session *session,
                                         session->sample_id_all, sample);
 }
 
+void perf_session__print_symbols(union perf_event *event,
+                                 struct perf_sample *sample,
+                                 struct perf_session *session);
+
 #endif /* __PERF_SESSION_H */