File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
new file mode 100644
index 0000000..99d127f
--- /dev/null
+++ b/tools/perf/builtin-inject.c
@@ -0,0 +1,767 @@
+/*
+ * 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/color.h"
+#include "util/evlist.h"
+#include "util/evsel.h"
+#include "util/session.h"
+#include "util/tool.h"
+#include "util/debug.h"
+#include "util/build-id.h"
+#include "util/data.h"
+#include "util/auxtrace.h"
+
+#include "util/parse-options.h"
+
+#include <linux/list.h>
+
+struct perf_inject {
+ struct perf_tool tool;
+ struct perf_session *session;
+ bool build_ids;
+ bool sched_stat;
+ bool have_auxtrace;
+ bool strip;
+ const char *input_name;
+ struct perf_data_file output;
+ u64 bytes_written;
+ u64 aux_id;
+ struct list_head samples;
+ struct itrace_synth_opts itrace_synth_opts;
+};
+
+struct event_entry {
+ struct list_head node;
+ u32 tid;
+ union perf_event event[0];
+};
+
+static int output_bytes(struct perf_inject *inject, void *buf, size_t sz)
+{
+ ssize_t size;
+
+ size = perf_data_file__write(&inject->output, buf, sz);
+ if (size < 0)
+ return -errno;
+
+ inject->bytes_written += size;
+ return 0;
+}
+
+static int perf_event__repipe_synth(struct perf_tool *tool,
+ union perf_event *event)
+{
+ struct perf_inject *inject = container_of(tool, struct perf_inject,
+ tool);
+
+ return output_bytes(inject, event, event->header.size);
+}
+
+static int perf_event__repipe_oe_synth(struct perf_tool *tool,
+ union perf_event *event,
+ struct ordered_events *oe __maybe_unused)
+{
+ return perf_event__repipe_synth(tool, event);
+}
+
+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);
+}
+
+static int perf_event__repipe_attr(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_evlist **pevlist)
+{
+ struct perf_inject *inject = container_of(tool, struct perf_inject,
+ tool);
+ int ret;
+
+ ret = perf_event__process_attr(tool, event, pevlist);
+ if (ret)
+ return ret;
+
+ if (!inject->output.is_pipe)
+ return 0;
+
+ return perf_event__repipe_synth(tool, event);
+}
+
+#ifdef HAVE_AUXTRACE_SUPPORT
+
+static int copy_bytes(struct perf_inject *inject, int fd, off_t size)
+{
+ char buf[4096];
+ ssize_t ssz;
+ int ret;
+
+ while (size > 0) {
+ ssz = read(fd, buf, min(size, (off_t)sizeof(buf)));
+ if (ssz < 0)
+ return -errno;
+ ret = output_bytes(inject, buf, ssz);
+ if (ret)
+ return ret;
+ size -= ssz;
+ }
+
+ return 0;
+}
+
+static s64 perf_event__repipe_auxtrace(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_session *session
+ __maybe_unused)
+{
+ struct perf_inject *inject = container_of(tool, struct perf_inject,
+ tool);
+ int ret;
+
+ inject->have_auxtrace = true;
+
+ if (!inject->output.is_pipe) {
+ off_t offset;
+
+ offset = lseek(inject->output.fd, 0, SEEK_CUR);
+ if (offset == -1)
+ return -errno;
+ ret = auxtrace_index__auxtrace_event(&session->auxtrace_index,
+ event, offset);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (perf_data_file__is_pipe(session->file) || !session->one_mmap) {
+ ret = output_bytes(inject, event, event->header.size);
+ if (ret < 0)
+ return ret;
+ ret = copy_bytes(inject, perf_data_file__fd(session->file),
+ event->auxtrace.size);
+ } else {
+ ret = output_bytes(inject, event,
+ event->header.size + event->auxtrace.size);
+ }
+ if (ret < 0)
+ return ret;
+
+ return event->auxtrace.size;
+}
+
+#else
+
+static s64
+perf_event__repipe_auxtrace(struct perf_tool *tool __maybe_unused,
+ union perf_event *event __maybe_unused,
+ struct perf_session *session __maybe_unused)
+{
+ pr_err("AUX area tracing not supported\n");
+ return -EINVAL;
+}
+
+#endif
+
+static int perf_event__repipe(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample __maybe_unused,
+ struct machine *machine __maybe_unused)
+{
+ return perf_event__repipe_synth(tool, event);
+}
+
+static int perf_event__drop(struct perf_tool *tool __maybe_unused,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ struct machine *machine __maybe_unused)
+{
+ return 0;
+}
+
+static int perf_event__drop_aux(struct perf_tool *tool,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample,
+ struct machine *machine __maybe_unused)
+{
+ struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
+
+ if (!inject->aux_id)
+ inject->aux_id = sample->id;
+
+ return 0;
+}
+
+typedef int (*inject_handler)(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine);
+
+static int perf_event__repipe_sample(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine)
+{
+ if (evsel->handler) {
+ inject_handler f = evsel->handler;
+ return f(tool, event, sample, evsel, machine);
+ }
+
+ build_id__mark_dso_hit(tool, event, sample, evsel, machine);
+
+ return perf_event__repipe_synth(tool, event);
+}
+
+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_mmap2(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ int err;
+
+ err = perf_event__process_mmap2(tool, event, sample, machine);
+ perf_event__repipe(tool, event, sample, machine);
+
+ return err;
+}
+
+static int perf_event__repipe_fork(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ int err;
+
+ err = perf_event__process_fork(tool, event, sample, machine);
+ perf_event__repipe(tool, event, sample, machine);
+
+ return err;
+}
+
+static int perf_event__repipe_comm(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ int err;
+
+ err = perf_event__process_comm(tool, event, sample, machine);
+ perf_event__repipe(tool, event, sample, machine);
+
+ return err;
+}
+
+static int perf_event__repipe_exit(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct machine *machine)
+{
+ int err;
+
+ err = perf_event__process_exit(tool, event, sample, machine);
+ perf_event__repipe(tool, event, sample, machine);
+
+ return err;
+}
+
+static int perf_event__repipe_tracing_data(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_session *session)
+{
+ int err;
+
+ perf_event__repipe_synth(tool, event);
+ err = perf_event__process_tracing_data(tool, event, session);
+
+ return err;
+}
+
+static int perf_event__repipe_id_index(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_session *session)
+{
+ int err;
+
+ perf_event__repipe_synth(tool, event);
+ err = perf_event__process_id_index(tool, event, session);
+
+ return err;
+}
+
+static int dso__read_build_id(struct dso *dso)
+{
+ if (dso->has_build_id)
+ return 0;
+
+ if (filename__read_build_id(dso->long_name, dso->build_id,
+ sizeof(dso->build_id)) > 0) {
+ dso->has_build_id = true;
+ return 0;
+ }
+
+ return -1;
+}
+
+static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool,
+ struct machine *machine)
+{
+ u16 misc = PERF_RECORD_MISC_USER;
+ int err;
+
+ if (dso__read_build_id(dso) < 0) {
+ pr_debug("no build_id found for %s\n", dso->long_name);
+ return -1;
+ }
+
+ if (dso->kernel)
+ misc = PERF_RECORD_MISC_KERNEL;
+
+ err = perf_event__synthesize_build_id(tool, dso, misc, perf_event__repipe,
+ machine);
+ if (err) {
+ pr_err("Can't synthesize build_id event for %s\n", dso->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, sample->pid, sample->tid);
+ if (thread == NULL) {
+ pr_err("problem processing %d event, skipping it.\n",
+ event->header.type);
+ goto repipe;
+ }
+
+ thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->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 HAVE_LIBELF_SUPPORT
+ pr_warning("no symbols found in %s, maybe "
+ "install a debug package?\n",
+ al.map->dso->long_name);
+#endif
+ }
+ }
+ }
+
+ thread__put(thread);
+repipe:
+ perf_event__repipe(tool, event, sample, machine);
+ return 0;
+}
+
+static int perf_inject__sched_process_exit(struct perf_tool *tool,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel __maybe_unused,
+ struct machine *machine __maybe_unused)
+{
+ struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
+ struct event_entry *ent;
+
+ list_for_each_entry(ent, &inject->samples, node) {
+ if (sample->tid == ent->tid) {
+ list_del_init(&ent->node);
+ free(ent);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int perf_inject__sched_switch(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine)
+{
+ struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
+ struct event_entry *ent;
+
+ perf_inject__sched_process_exit(tool, event, sample, evsel, machine);
+
+ ent = malloc(event->header.size + sizeof(struct event_entry));
+ if (ent == NULL) {
+ color_fprintf(stderr, PERF_COLOR_RED,
+ "Not enough memory to process sched switch event!");
+ return -1;
+ }
+
+ ent->tid = sample->tid;
+ memcpy(&ent->event, event, event->header.size);
+ list_add(&ent->node, &inject->samples);
+ return 0;
+}
+
+static int perf_inject__sched_stat(struct perf_tool *tool,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel,
+ struct machine *machine)
+{
+ struct event_entry *ent;
+ union perf_event *event_sw;
+ struct perf_sample sample_sw;
+ struct perf_inject *inject = container_of(tool, struct perf_inject, tool);
+ u32 pid = perf_evsel__intval(evsel, sample, "pid");
+
+ list_for_each_entry(ent, &inject->samples, node) {
+ if (pid == ent->tid)
+ goto found;
+ }
+
+ return 0;
+found:
+ event_sw = &ent->event[0];
+ perf_evsel__parse_sample(evsel, event_sw, &sample_sw);
+
+ sample_sw.period = sample->period;
+ sample_sw.time = sample->time;
+ perf_event__synthesize_sample(event_sw, evsel->attr.sample_type,
+ evsel->attr.read_format, &sample_sw,
+ false);
+ build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine);
+ return perf_event__repipe(tool, event_sw, &sample_sw, machine);
+}
+
+static void sig_handler(int sig __maybe_unused)
+{
+ session_done = 1;
+}
+
+static int perf_evsel__check_stype(struct perf_evsel *evsel,
+ u64 sample_type, const char *sample_msg)
+{
+ struct perf_event_attr *attr = &evsel->attr;
+ const char *name = perf_evsel__name(evsel);
+
+ if (!(attr->sample_type & sample_type)) {
+ pr_err("Samples for %s event do not have %s attribute set.",
+ name, sample_msg);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int drop_sample(struct perf_tool *tool __maybe_unused,
+ union perf_event *event __maybe_unused,
+ struct perf_sample *sample __maybe_unused,
+ struct perf_evsel *evsel __maybe_unused,
+ struct machine *machine __maybe_unused)
+{
+ return 0;
+}
+
+static void strip_init(struct perf_inject *inject)
+{
+ struct perf_evlist *evlist = inject->session->evlist;
+ struct perf_evsel *evsel;
+
+ inject->tool.context_switch = perf_event__drop;
+
+ evlist__for_each(evlist, evsel)
+ evsel->handler = drop_sample;
+}
+
+static bool has_tracking(struct perf_evsel *evsel)
+{
+ return evsel->attr.mmap || evsel->attr.mmap2 || evsel->attr.comm ||
+ evsel->attr.task;
+}
+
+#define COMPAT_MASK (PERF_SAMPLE_ID | PERF_SAMPLE_TID | PERF_SAMPLE_TIME | \
+ PERF_SAMPLE_ID | PERF_SAMPLE_CPU | PERF_SAMPLE_IDENTIFIER)
+
+/*
+ * In order that the perf.data file is parsable, tracking events like MMAP need
+ * their selected event to exist, except if there is only 1 selected event left
+ * and it has a compatible sample type.
+ */
+static bool ok_to_remove(struct perf_evlist *evlist,
+ struct perf_evsel *evsel_to_remove)
+{
+ struct perf_evsel *evsel;
+ int cnt = 0;
+ bool ok = false;
+
+ if (!has_tracking(evsel_to_remove))
+ return true;
+
+ evlist__for_each(evlist, evsel) {
+ if (evsel->handler != drop_sample) {
+ cnt += 1;
+ if ((evsel->attr.sample_type & COMPAT_MASK) ==
+ (evsel_to_remove->attr.sample_type & COMPAT_MASK))
+ ok = true;
+ }
+ }
+
+ return ok && cnt == 1;
+}
+
+static void strip_fini(struct perf_inject *inject)
+{
+ struct perf_evlist *evlist = inject->session->evlist;
+ struct perf_evsel *evsel, *tmp;
+
+ /* Remove non-synthesized evsels if possible */
+ evlist__for_each_safe(evlist, tmp, evsel) {
+ if (evsel->handler == drop_sample &&
+ ok_to_remove(evlist, evsel)) {
+ pr_debug("Deleting %s\n", perf_evsel__name(evsel));
+ perf_evlist__remove(evlist, evsel);
+ perf_evsel__delete(evsel);
+ }
+ }
+}
+
+static int __cmd_inject(struct perf_inject *inject)
+{
+ int ret = -EINVAL;
+ struct perf_session *session = inject->session;
+ struct perf_data_file *file_out = &inject->output;
+ int fd = perf_data_file__fd(file_out);
+ u64 output_data_offset;
+
+ signal(SIGINT, sig_handler);
+
+ if (inject->build_ids || inject->sched_stat ||
+ inject->itrace_synth_opts.set) {
+ inject->tool.mmap = perf_event__repipe_mmap;
+ inject->tool.mmap2 = perf_event__repipe_mmap2;
+ inject->tool.fork = perf_event__repipe_fork;
+ inject->tool.tracing_data = perf_event__repipe_tracing_data;
+ }
+
+ output_data_offset = session->header.data_offset;
+
+ if (inject->build_ids) {
+ inject->tool.sample = perf_event__inject_buildid;
+ } else if (inject->sched_stat) {
+ struct perf_evsel *evsel;
+
+ evlist__for_each(session->evlist, evsel) {
+ const char *name = perf_evsel__name(evsel);
+
+ if (!strcmp(name, "sched:sched_switch")) {
+ if (perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID"))
+ return -EINVAL;
+
+ evsel->handler = perf_inject__sched_switch;
+ } else if (!strcmp(name, "sched:sched_process_exit"))
+ evsel->handler = perf_inject__sched_process_exit;
+ else if (!strncmp(name, "sched:sched_stat_", 17))
+ evsel->handler = perf_inject__sched_stat;
+ }
+ } else if (inject->itrace_synth_opts.set) {
+ session->itrace_synth_opts = &inject->itrace_synth_opts;
+ inject->itrace_synth_opts.inject = true;
+ inject->tool.comm = perf_event__repipe_comm;
+ inject->tool.exit = perf_event__repipe_exit;
+ inject->tool.id_index = perf_event__repipe_id_index;
+ inject->tool.auxtrace_info = perf_event__process_auxtrace_info;
+ inject->tool.auxtrace = perf_event__process_auxtrace;
+ inject->tool.aux = perf_event__drop_aux;
+ inject->tool.itrace_start = perf_event__drop_aux,
+ inject->tool.ordered_events = true;
+ inject->tool.ordering_requires_timestamps = true;
+ /* Allow space in the header for new attributes */
+ output_data_offset = 4096;
+ if (inject->strip)
+ strip_init(inject);
+ }
+
+ if (!inject->itrace_synth_opts.set)
+ auxtrace_index__free(&session->auxtrace_index);
+
+ if (!file_out->is_pipe)
+ lseek(fd, output_data_offset, SEEK_SET);
+
+ ret = perf_session__process_events(session);
+
+ if (!file_out->is_pipe) {
+ if (inject->build_ids) {
+ perf_header__set_feat(&session->header,
+ HEADER_BUILD_ID);
+ if (inject->have_auxtrace)
+ dsos__hit_all(session);
+ }
+ /*
+ * The AUX areas have been removed and replaced with
+ * synthesized hardware events, so clear the feature flag and
+ * remove the evsel.
+ */
+ if (inject->itrace_synth_opts.set) {
+ struct perf_evsel *evsel;
+
+ perf_header__clear_feat(&session->header,
+ HEADER_AUXTRACE);
+ if (inject->itrace_synth_opts.last_branch)
+ perf_header__set_feat(&session->header,
+ HEADER_BRANCH_STACK);
+ evsel = perf_evlist__id2evsel_strict(session->evlist,
+ inject->aux_id);
+ if (evsel) {
+ pr_debug("Deleting %s\n",
+ perf_evsel__name(evsel));
+ perf_evlist__remove(session->evlist, evsel);
+ perf_evsel__delete(evsel);
+ }
+ if (inject->strip)
+ strip_fini(inject);
+ }
+ session->header.data_offset = output_data_offset;
+ 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,
+ .lost_samples = perf_event__repipe,
+ .aux = perf_event__repipe,
+ .itrace_start = perf_event__repipe,
+ .context_switch = 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_BOOLEAN(0, "strip", &inject.strip,
+ "strip non-synthesized events (use with --itrace)"),
+ 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 (inject.strip && !inject.itrace_synth_opts.set) {
+ pr_err("--strip option requires --itrace option\n");
+ return -1;
+ }
+
+ 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;
+}