643 lines
16 KiB
C
643 lines
16 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/color.h"
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#include "util/evlist.h"
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#include "util/evsel.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/build-id.h"
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#include "util/data.h"
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#include "util/auxtrace.h"
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#include "util/parse-options.h"
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#include <linux/list.h>
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struct perf_inject {
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struct perf_tool tool;
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struct perf_session *session;
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bool build_ids;
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bool sched_stat;
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bool have_auxtrace;
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const char *input_name;
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struct perf_data_file output;
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u64 bytes_written;
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struct list_head samples;
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struct itrace_synth_opts itrace_synth_opts;
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};
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struct event_entry {
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struct list_head node;
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u32 tid;
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union perf_event event[0];
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};
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static int output_bytes(struct perf_inject *inject, void *buf, size_t sz)
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{
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ssize_t size;
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size = perf_data_file__write(&inject->output, buf, sz);
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if (size < 0)
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return -errno;
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inject->bytes_written += size;
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return 0;
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}
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static int perf_event__repipe_synth(struct perf_tool *tool,
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union perf_event *event)
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{
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struct perf_inject *inject = container_of(tool, struct perf_inject,
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tool);
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return output_bytes(inject, event, event->header.size);
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}
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static int perf_event__repipe_oe_synth(struct perf_tool *tool,
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union perf_event *event,
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struct ordered_events *oe __maybe_unused)
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{
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return perf_event__repipe_synth(tool, event);
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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
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__maybe_unused)
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{
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return perf_event__repipe_synth(tool, event);
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}
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static int perf_event__repipe_attr(struct perf_tool *tool,
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union perf_event *event,
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struct perf_evlist **pevlist)
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{
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struct perf_inject *inject = container_of(tool, struct perf_inject,
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tool);
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int ret;
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ret = perf_event__process_attr(tool, event, pevlist);
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if (ret)
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return ret;
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if (!inject->output.is_pipe)
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return 0;
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return perf_event__repipe_synth(tool, event);
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}
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#ifdef HAVE_AUXTRACE_SUPPORT
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static int copy_bytes(struct perf_inject *inject, int fd, off_t size)
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{
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char buf[4096];
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ssize_t ssz;
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int ret;
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while (size > 0) {
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ssz = read(fd, buf, min(size, (off_t)sizeof(buf)));
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if (ssz < 0)
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return -errno;
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ret = output_bytes(inject, buf, ssz);
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if (ret)
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return ret;
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size -= ssz;
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}
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return 0;
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}
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static s64 perf_event__repipe_auxtrace(struct perf_tool *tool,
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union perf_event *event,
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struct perf_session *session
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__maybe_unused)
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{
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struct perf_inject *inject = container_of(tool, struct perf_inject,
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tool);
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int ret;
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inject->have_auxtrace = true;
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if (!inject->output.is_pipe) {
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off_t offset;
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offset = lseek(inject->output.fd, 0, SEEK_CUR);
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if (offset == -1)
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return -errno;
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ret = auxtrace_index__auxtrace_event(&session->auxtrace_index,
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event, offset);
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if (ret < 0)
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return ret;
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}
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if (perf_data_file__is_pipe(session->file) || !session->one_mmap) {
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ret = output_bytes(inject, event, event->header.size);
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if (ret < 0)
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return ret;
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ret = copy_bytes(inject, perf_data_file__fd(session->file),
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event->auxtrace.size);
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} else {
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ret = output_bytes(inject, event,
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event->header.size + event->auxtrace.size);
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}
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if (ret < 0)
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return ret;
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return event->auxtrace.size;
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}
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#else
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static s64
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perf_event__repipe_auxtrace(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct perf_session *session __maybe_unused)
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{
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pr_err("AUX area tracing not supported\n");
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return -EINVAL;
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}
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#endif
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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 __maybe_unused,
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struct machine *machine __maybe_unused)
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{
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return perf_event__repipe_synth(tool, event);
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}
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typedef int (*inject_handler)(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,
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struct machine *machine);
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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,
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struct perf_evsel *evsel,
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struct machine *machine)
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{
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if (evsel->handler) {
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inject_handler f = evsel->handler;
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return f(tool, event, sample, evsel, machine);
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}
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build_id__mark_dso_hit(tool, event, sample, evsel, machine);
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return perf_event__repipe_synth(tool, event);
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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_mmap2(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_mmap2(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_fork(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_fork(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_comm(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_comm(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_exit(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_exit(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(struct perf_tool *tool,
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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(tool, event);
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err = perf_event__process_tracing_data(tool, event, session);
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return err;
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}
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static int perf_event__repipe_id_index(struct perf_tool *tool,
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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(tool, event);
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err = perf_event__process_id_index(tool, event, session);
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return err;
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}
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static int dso__read_build_id(struct dso *dso)
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{
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if (dso->has_build_id)
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return 0;
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if (filename__read_build_id(dso->long_name, dso->build_id,
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sizeof(dso->build_id)) > 0) {
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dso->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 *dso, 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(dso) < 0) {
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pr_debug("no build_id found for %s\n", dso->long_name);
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return -1;
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}
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if (dso->kernel)
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misc = PERF_RECORD_MISC_KERNEL;
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err = perf_event__synthesize_build_id(tool, dso, 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", dso->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 __maybe_unused,
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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, sample->pid, sample->tid);
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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, cpumode, MAP__FUNCTION, sample->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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#ifdef HAVE_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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thread__put(thread);
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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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static int perf_inject__sched_process_exit(struct perf_tool *tool,
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union perf_event *event __maybe_unused,
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struct perf_sample *sample,
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struct perf_evsel *evsel __maybe_unused,
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struct machine *machine __maybe_unused)
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{
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struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
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struct event_entry *ent;
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list_for_each_entry(ent, &inject->samples, node) {
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if (sample->tid == ent->tid) {
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list_del_init(&ent->node);
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free(ent);
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break;
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}
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}
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return 0;
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}
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static int perf_inject__sched_switch(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,
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struct machine *machine)
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{
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struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
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struct event_entry *ent;
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perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
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ent = malloc(event->header.size + sizeof(struct event_entry));
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if (ent == NULL) {
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color_fprintf(stderr, PERF_COLOR_RED,
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"Not enough memory to process sched switch event!");
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return -1;
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}
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ent->tid = sample->tid;
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memcpy(&ent->event, event, event->header.size);
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list_add(&ent->node, &inject->samples);
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return 0;
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}
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static int perf_inject__sched_stat(struct perf_tool *tool,
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union perf_event *event __maybe_unused,
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struct perf_sample *sample,
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struct perf_evsel *evsel,
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struct machine *machine)
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{
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struct event_entry *ent;
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union perf_event *event_sw;
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struct perf_sample sample_sw;
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struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
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u32 pid = perf_evsel__intval(evsel, sample, "pid");
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list_for_each_entry(ent, &inject->samples, node) {
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if (pid == ent->tid)
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goto found;
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}
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return 0;
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found:
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event_sw = &ent->event[0];
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perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
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sample_sw.period = sample->period;
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sample_sw.time = sample->time;
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perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
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evsel->attr.read_format, &sample_sw,
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false);
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build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
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return perf_event__repipe(tool, event_sw, &sample_sw, machine);
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}
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static void sig_handler(int sig __maybe_unused)
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{
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session_done = 1;
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}
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static int perf_evsel__check_stype(struct perf_evsel *evsel,
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u64 sample_type, const char *sample_msg)
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{
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struct perf_event_attr *attr = &evsel->attr;
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const char *name = perf_evsel__name(evsel);
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if (!(attr->sample_type & sample_type)) {
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pr_err("Samples for %s event do not have %s attribute set.",
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name, sample_msg);
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return -EINVAL;
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}
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return 0;
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}
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static int __cmd_inject(struct perf_inject *inject)
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{
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int ret = -EINVAL;
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struct perf_session *session = inject->session;
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struct perf_data_file *file_out = &inject->output;
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int fd = perf_data_file__fd(file_out);
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u64 output_data_offset;
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signal(SIGINT, sig_handler);
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if (inject->build_ids || inject->sched_stat ||
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inject->itrace_synth_opts.set) {
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inject->tool.mmap = perf_event__repipe_mmap;
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inject->tool.mmap2 = perf_event__repipe_mmap2;
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inject->tool.fork = perf_event__repipe_fork;
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inject->tool.tracing_data = perf_event__repipe_tracing_data;
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}
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output_data_offset = session->header.data_offset;
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if (inject->build_ids) {
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inject->tool.sample = perf_event__inject_buildid;
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} else if (inject->sched_stat) {
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struct perf_evsel *evsel;
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evlist__for_each(session->evlist, evsel) {
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const char *name = perf_evsel__name(evsel);
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if (!strcmp(name, "sched:sched_switch")) {
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if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
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return -EINVAL;
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evsel->handler = perf_inject__sched_switch;
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} else if (!strcmp(name, "sched:sched_process_exit"))
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evsel->handler = perf_inject__sched_process_exit;
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else if (!strncmp(name, "sched:sched_stat_", 17))
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evsel->handler = perf_inject__sched_stat;
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}
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} else if (inject->itrace_synth_opts.set) {
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session->itrace_synth_opts = &inject->itrace_synth_opts;
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inject->itrace_synth_opts.inject = true;
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inject->tool.comm = perf_event__repipe_comm;
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inject->tool.exit = perf_event__repipe_exit;
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inject->tool.id_index = perf_event__repipe_id_index;
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inject->tool.auxtrace_info = perf_event__process_auxtrace_info;
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inject->tool.auxtrace = perf_event__process_auxtrace;
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inject->tool.ordered_events = true;
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inject->tool.ordering_requires_timestamps = true;
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/* Allow space in the header for new attributes */
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output_data_offset = 4096;
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}
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if (!inject->itrace_synth_opts.set)
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auxtrace_index__free(&session->auxtrace_index);
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if (!file_out->is_pipe)
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lseek(fd, output_data_offset, SEEK_SET);
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ret = perf_session__process_events(session);
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if (!file_out->is_pipe) {
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if (inject->build_ids) {
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perf_header__set_feat(&session->header,
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HEADER_BUILD_ID);
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if (inject->have_auxtrace)
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dsos__hit_all(session);
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}
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/*
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* The AUX areas have been removed and replaced with
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* synthesized hardware events, so clear the feature flag.
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*/
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if (inject->itrace_synth_opts.set)
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perf_header__clear_feat(&session->header,
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HEADER_AUXTRACE);
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session->header.data_offset = output_data_offset;
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session->header.data_size = inject->bytes_written;
|
|
perf_session__write_header(session, session->evlist, fd, true);
|
|
}
|
|
|
|
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,
|
|
.mmap2 = perf_event__repipe,
|
|
.comm = perf_event__repipe,
|
|
.fork = perf_event__repipe,
|
|
.exit = perf_event__repipe,
|
|
.lost = perf_event__repipe,
|
|
.aux = perf_event__repipe,
|
|
.itrace_start = perf_event__repipe,
|
|
.read = perf_event__repipe_sample,
|
|
.throttle = perf_event__repipe,
|
|
.unthrottle = perf_event__repipe,
|
|
.attr = perf_event__repipe_attr,
|
|
.tracing_data = perf_event__repipe_op2_synth,
|
|
.auxtrace_info = perf_event__repipe_op2_synth,
|
|
.auxtrace = perf_event__repipe_auxtrace,
|
|
.auxtrace_error = perf_event__repipe_op2_synth,
|
|
.finished_round = perf_event__repipe_oe_synth,
|
|
.build_id = perf_event__repipe_op2_synth,
|
|
.id_index = perf_event__repipe_op2_synth,
|
|
},
|
|
.input_name = "-",
|
|
.samples = LIST_HEAD_INIT(inject.samples),
|
|
.output = {
|
|
.path = "-",
|
|
.mode = PERF_DATA_MODE_WRITE,
|
|
},
|
|
};
|
|
struct perf_data_file file = {
|
|
.mode = PERF_DATA_MODE_READ,
|
|
};
|
|
int ret;
|
|
|
|
const struct option options[] = {
|
|
OPT_BOOLEAN('b', "build-ids", &inject.build_ids,
|
|
"Inject build-ids into the output stream"),
|
|
OPT_STRING('i', "input", &inject.input_name, "file",
|
|
"input file name"),
|
|
OPT_STRING('o', "output", &inject.output.path, "file",
|
|
"output file name"),
|
|
OPT_BOOLEAN('s', "sched-stat", &inject.sched_stat,
|
|
"Merge sched-stat and sched-switch for getting events "
|
|
"where and how long tasks slept"),
|
|
OPT_INCR('v', "verbose", &verbose,
|
|
"be more verbose (show build ids, etc)"),
|
|
OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file",
|
|
"kallsyms pathname"),
|
|
OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
|
|
OPT_CALLBACK_OPTARG(0, "itrace", &inject.itrace_synth_opts,
|
|
NULL, "opts", "Instruction Tracing options",
|
|
itrace_parse_synth_opts),
|
|
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 (perf_data_file__open(&inject.output)) {
|
|
perror("failed to create output file");
|
|
return -1;
|
|
}
|
|
|
|
inject.tool.ordered_events = inject.sched_stat;
|
|
|
|
file.path = inject.input_name;
|
|
inject.session = perf_session__new(&file, true, &inject.tool);
|
|
if (inject.session == NULL)
|
|
return -1;
|
|
|
|
ret = symbol__init(&inject.session->header.env);
|
|
if (ret < 0)
|
|
goto out_delete;
|
|
|
|
ret = __cmd_inject(&inject);
|
|
|
|
out_delete:
|
|
perf_session__delete(inject.session);
|
|
return ret;
|
|
}
|