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perf script: Add support for dumping symbols

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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>
This commit is contained in:
David Ahern 2011-03-09 22:23:27 -07:00 committed by Arnaldo Carvalho de Melo
parent 745f43e343
commit c0230b2bfb
4 changed files with 110 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
tools/perf/Documentation/perf-script.txt
View File

@ -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
--------

31
tools/perf/builtin-script.c
View File

@ -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;

61
tools/perf/util/session.c
View File

@ -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);
}
}

4
tools/perf/util/session.h
View File

@ -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 */