linux/tools/perf/builtin-inject.c
Arnaldo Carvalho de Melo 002439e84e perf inject: Don't use globals where not needed to
Some variables were global but used in just one function, so move it to
where it belongs.

Leftover from patch at the beggining of this series.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-9cer20zhw64wbxyb0zias82i@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-10-02 18:36:41 -03:00

289 lines
6.6 KiB
C

/*
* builtin-inject.c
*
* Builtin inject command: Examine the live mode (stdin) event stream
* and repipe it to stdout while optionally injecting additional
* events into it.
*/
#include "builtin.h"
#include "perf.h"
#include "util/session.h"
#include "util/tool.h"
#include "util/debug.h"
#include "util/parse-options.h"
struct perf_inject {
struct perf_tool tool;
bool build_ids;
};
static int perf_event__repipe_synth(struct perf_tool *tool __maybe_unused,
union perf_event *event,
struct machine *machine __maybe_unused)
{
uint32_t size;
void *buf = event;
size = event->header.size;
while (size) {
int ret = write(STDOUT_FILENO, buf, size);
if (ret < 0)
return -errno;
size -= ret;
buf += ret;
}
return 0;
}
static int perf_event__repipe_op2_synth(struct perf_tool *tool,
union perf_event *event,
struct perf_session *session
__maybe_unused)
{
return perf_event__repipe_synth(tool, event, NULL);
}
static int perf_event__repipe_event_type_synth(struct perf_tool *tool,
union perf_event *event)
{
return perf_event__repipe_synth(tool, event, NULL);
}
static int perf_event__repipe_tracing_data_synth(union perf_event *event,
struct perf_session *session
__maybe_unused)
{
return perf_event__repipe_synth(NULL, event, NULL);
}
static int perf_event__repipe_attr(union perf_event *event,
struct perf_evlist **pevlist __maybe_unused)
{
int ret;
ret = perf_event__process_attr(event, pevlist);
if (ret)
return ret;
return perf_event__repipe_synth(NULL, event, NULL);
}
static int perf_event__repipe(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct machine *machine)
{
return perf_event__repipe_synth(tool, event, machine);
}
static int perf_event__repipe_sample(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample __maybe_unused,
struct perf_evsel *evsel __maybe_unused,
struct machine *machine)
{
return perf_event__repipe_synth(tool, event, machine);
}
static int perf_event__repipe_mmap(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
int err;
err = perf_event__process_mmap(tool, event, sample, machine);
perf_event__repipe(tool, event, sample, machine);
return err;
}
static int perf_event__repipe_task(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine)
{
int err;
err = perf_event__process_task(tool, event, sample, machine);
perf_event__repipe(tool, event, sample, machine);
return err;
}
static int perf_event__repipe_tracing_data(union perf_event *event,
struct perf_session *session)
{
int err;
perf_event__repipe_synth(NULL, event, NULL);
err = perf_event__process_tracing_data(event, session);
return err;
}
static int dso__read_build_id(struct dso *self)
{
if (self->has_build_id)
return 0;
if (filename__read_build_id(self->long_name, self->build_id,
sizeof(self->build_id)) > 0) {
self->has_build_id = true;
return 0;
}
return -1;
}
static int dso__inject_build_id(struct dso *self, struct perf_tool *tool,
struct machine *machine)
{
u16 misc = PERF_RECORD_MISC_USER;
int err;
if (dso__read_build_id(self) < 0) {
pr_debug("no build_id found for %s\n", self->long_name);
return -1;
}
if (self->kernel)
misc = PERF_RECORD_MISC_KERNEL;
err = perf_event__synthesize_build_id(tool, self, misc, perf_event__repipe,
machine);
if (err) {
pr_err("Can't synthesize build_id event for %s\n", self->long_name);
return -1;
}
return 0;
}
static int perf_event__inject_buildid(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel __maybe_unused,
struct machine *machine)
{
struct addr_location al;
struct thread *thread;
u8 cpumode;
cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
thread = machine__findnew_thread(machine, event->ip.pid);
if (thread == NULL) {
pr_err("problem processing %d event, skipping it.\n",
event->header.type);
goto repipe;
}
thread__find_addr_map(thread, machine, cpumode, MAP__FUNCTION,
event->ip.ip, &al);
if (al.map != NULL) {
if (!al.map->dso->hit) {
al.map->dso->hit = 1;
if (map__load(al.map, NULL) >= 0) {
dso__inject_build_id(al.map->dso, tool, machine);
/*
* If this fails, too bad, let the other side
* account this as unresolved.
*/
} else {
#ifdef LIBELF_SUPPORT
pr_warning("no symbols found in %s, maybe "
"install a debug package?\n",
al.map->dso->long_name);
#endif
}
}
}
repipe:
perf_event__repipe(tool, event, sample, machine);
return 0;
}
extern volatile int session_done;
static void sig_handler(int sig __maybe_unused)
{
session_done = 1;
}
static int __cmd_inject(struct perf_inject *inject)
{
struct perf_session *session;
int ret = -EINVAL;
signal(SIGINT, sig_handler);
if (inject->build_ids) {
inject->tool.sample = perf_event__inject_buildid;
inject->tool.mmap = perf_event__repipe_mmap;
inject->tool.fork = perf_event__repipe_task;
inject->tool.tracing_data = perf_event__repipe_tracing_data;
}
session = perf_session__new("-", O_RDONLY, false, true, &inject->tool);
if (session == NULL)
return -ENOMEM;
ret = perf_session__process_events(session, &inject->tool);
perf_session__delete(session);
return ret;
}
int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
{
struct perf_inject inject = {
.tool = {
.sample = perf_event__repipe_sample,
.mmap = perf_event__repipe,
.comm = perf_event__repipe,
.fork = perf_event__repipe,
.exit = perf_event__repipe,
.lost = perf_event__repipe,
.read = perf_event__repipe_sample,
.throttle = perf_event__repipe,
.unthrottle = perf_event__repipe,
.attr = perf_event__repipe_attr,
.event_type = perf_event__repipe_event_type_synth,
.tracing_data = perf_event__repipe_tracing_data_synth,
.build_id = perf_event__repipe_op2_synth,
},
};
const struct option options[] = {
OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
"Inject build-ids into the output stream"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show build ids, etc)"),
OPT_END()
};
const char * const inject_usage[] = {
"perf inject [<options>]",
NULL
};
argc = parse_options(argc, argv, options, inject_usage, 0);
/*
* Any (unrecognized) arguments left?
*/
if (argc)
usage_with_options(inject_usage, options);
if (symbol__init() < 0)
return -1;
return __cmd_inject(&inject);
}