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