| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * 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 "util/color.h" |
| #include "util/dso.h" |
| #include "util/vdso.h" |
| #include "util/evlist.h" |
| #include "util/evsel.h" |
| #include "util/map.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/jit.h" |
| #include "util/string2.h" |
| #include "util/symbol.h" |
| #include "util/synthetic-events.h" |
| #include "util/thread.h" |
| #include "util/namespaces.h" |
| #include "util/util.h" |
| #include "util/tsc.h" |
| |
| #include <internal/lib.h> |
| |
| #include <linux/err.h> |
| #include <subcmd/parse-options.h> |
| #include <uapi/linux/mman.h> /* To get things like MAP_HUGETLB even on older libc headers */ |
| |
| #include <linux/list.h> |
| #include <linux/string.h> |
| #include <linux/zalloc.h> |
| #include <linux/hash.h> |
| #include <ctype.h> |
| #include <errno.h> |
| #include <signal.h> |
| #include <inttypes.h> |
| |
| struct guest_event { |
| struct perf_sample sample; |
| union perf_event *event; |
| char event_buf[PERF_SAMPLE_MAX_SIZE]; |
| }; |
| |
| struct guest_id { |
| /* hlist_node must be first, see free_hlist() */ |
| struct hlist_node node; |
| u64 id; |
| u64 host_id; |
| u32 vcpu; |
| }; |
| |
| struct guest_tid { |
| /* hlist_node must be first, see free_hlist() */ |
| struct hlist_node node; |
| /* Thread ID of QEMU thread */ |
| u32 tid; |
| u32 vcpu; |
| }; |
| |
| struct guest_vcpu { |
| /* Current host CPU */ |
| u32 cpu; |
| /* Thread ID of QEMU thread */ |
| u32 tid; |
| }; |
| |
| struct guest_session { |
| char *perf_data_file; |
| u32 machine_pid; |
| u64 time_offset; |
| double time_scale; |
| struct perf_tool tool; |
| struct perf_data data; |
| struct perf_session *session; |
| char *tmp_file_name; |
| int tmp_fd; |
| struct perf_tsc_conversion host_tc; |
| struct perf_tsc_conversion guest_tc; |
| bool copy_kcore_dir; |
| bool have_tc; |
| bool fetched; |
| bool ready; |
| u16 dflt_id_hdr_size; |
| u64 dflt_id; |
| u64 highest_id; |
| /* Array of guest_vcpu */ |
| struct guest_vcpu *vcpu; |
| size_t vcpu_cnt; |
| /* Hash table for guest_id */ |
| struct hlist_head heads[PERF_EVLIST__HLIST_SIZE]; |
| /* Hash table for guest_tid */ |
| struct hlist_head tids[PERF_EVLIST__HLIST_SIZE]; |
| /* Place to stash next guest event */ |
| struct guest_event ev; |
| }; |
| |
| struct perf_inject { |
| struct perf_tool tool; |
| struct perf_session *session; |
| bool build_ids; |
| bool build_id_all; |
| bool sched_stat; |
| bool have_auxtrace; |
| bool strip; |
| bool jit_mode; |
| bool in_place_update; |
| bool in_place_update_dry_run; |
| bool is_pipe; |
| bool copy_kcore_dir; |
| const char *input_name; |
| struct perf_data output; |
| u64 bytes_written; |
| u64 aux_id; |
| struct list_head samples; |
| struct itrace_synth_opts itrace_synth_opts; |
| char event_copy[PERF_SAMPLE_MAX_SIZE]; |
| struct perf_file_section secs[HEADER_FEAT_BITS]; |
| struct guest_session guest_session; |
| struct strlist *known_build_ids; |
| }; |
| |
| struct event_entry { |
| struct list_head node; |
| u32 tid; |
| union perf_event event[]; |
| }; |
| |
| static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool, |
| struct machine *machine, u8 cpumode, u32 flags); |
| |
| static int output_bytes(struct perf_inject *inject, void *buf, size_t sz) |
| { |
| ssize_t size; |
| |
| size = perf_data__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); |
| } |
| |
| #ifdef HAVE_JITDUMP |
| static int perf_event__drop_oe(struct perf_tool *tool __maybe_unused, |
| union perf_event *event __maybe_unused, |
| struct ordered_events *oe __maybe_unused) |
| { |
| return 0; |
| } |
| #endif |
| |
| static int perf_event__repipe_op2_synth(struct perf_session *session, |
| union perf_event *event) |
| { |
| return perf_event__repipe_synth(session->tool, event); |
| } |
| |
| static int perf_event__repipe_op4_synth(struct perf_session *session, |
| union perf_event *event, |
| u64 data __maybe_unused, |
| const char *str __maybe_unused) |
| { |
| return perf_event__repipe_synth(session->tool, event); |
| } |
| |
| static int perf_event__repipe_attr(struct perf_tool *tool, |
| union perf_event *event, |
| struct 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->is_pipe) |
| return 0; |
| |
| return perf_event__repipe_synth(tool, event); |
| } |
| |
| static int perf_event__repipe_event_update(struct perf_tool *tool, |
| union perf_event *event, |
| struct evlist **pevlist __maybe_unused) |
| { |
| return perf_event__repipe_synth(tool, event); |
| } |
| |
| #ifdef HAVE_AUXTRACE_SUPPORT |
| |
| static int copy_bytes(struct perf_inject *inject, struct perf_data *data, off_t size) |
| { |
| char buf[4096]; |
| ssize_t ssz; |
| int ret; |
| |
| while (size > 0) { |
| ssz = perf_data__read(data, 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_session *session, |
| union perf_event *event) |
| { |
| struct perf_tool *tool = session->tool; |
| 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.file.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__is_pipe(session->data) || !session->one_mmap) { |
| ret = output_bytes(inject, event, event->header.size); |
| if (ret < 0) |
| return ret; |
| ret = copy_bytes(inject, session->data, |
| 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_session *session __maybe_unused, |
| union perf_event *event __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; |
| } |
| |
| static union perf_event * |
| perf_inject__cut_auxtrace_sample(struct perf_inject *inject, |
| union perf_event *event, |
| struct perf_sample *sample) |
| { |
| size_t sz1 = sample->aux_sample.data - (void *)event; |
| size_t sz2 = event->header.size - sample->aux_sample.size - sz1; |
| union perf_event *ev = (union perf_event *)inject->event_copy; |
| |
| if (sz1 > event->header.size || sz2 > event->header.size || |
| sz1 + sz2 > event->header.size || |
| sz1 < sizeof(struct perf_event_header) + sizeof(u64)) |
| return event; |
| |
| memcpy(ev, event, sz1); |
| memcpy((void *)ev + sz1, (void *)event + event->header.size - sz2, sz2); |
| ev->header.size = sz1 + sz2; |
| ((u64 *)((void *)ev + sz1))[-1] = 0; |
| |
| return ev; |
| } |
| |
| typedef int (*inject_handler)(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct evsel *evsel, |
| struct machine *machine); |
| |
| static int perf_event__repipe_sample(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct evsel *evsel, |
| struct machine *machine) |
| { |
| struct perf_inject *inject = container_of(tool, struct perf_inject, |
| tool); |
| |
| if (evsel && evsel->handler) { |
| inject_handler f = evsel->handler; |
| return f(tool, event, sample, evsel, machine); |
| } |
| |
| build_id__mark_dso_hit(tool, event, sample, evsel, machine); |
| |
| if (inject->itrace_synth_opts.set && sample->aux_sample.size) |
| event = perf_inject__cut_auxtrace_sample(inject, event, sample); |
| |
| 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; |
| } |
| |
| #ifdef HAVE_JITDUMP |
| static int perf_event__jit_repipe_mmap(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct machine *machine) |
| { |
| struct perf_inject *inject = container_of(tool, struct perf_inject, tool); |
| u64 n = 0; |
| int ret; |
| |
| /* |
| * if jit marker, then inject jit mmaps and generate ELF images |
| */ |
| ret = jit_process(inject->session, &inject->output, machine, |
| event->mmap.filename, event->mmap.pid, event->mmap.tid, &n); |
| if (ret < 0) |
| return ret; |
| if (ret) { |
| inject->bytes_written += n; |
| return 0; |
| } |
| return perf_event__repipe_mmap(tool, event, sample, machine); |
| } |
| #endif |
| |
| static struct dso *findnew_dso(int pid, int tid, const char *filename, |
| struct dso_id *id, struct machine *machine) |
| { |
| struct thread *thread; |
| struct nsinfo *nsi = NULL; |
| struct nsinfo *nnsi; |
| struct dso *dso; |
| bool vdso; |
| |
| thread = machine__findnew_thread(machine, pid, tid); |
| if (thread == NULL) { |
| pr_err("cannot find or create a task %d/%d.\n", tid, pid); |
| return NULL; |
| } |
| |
| vdso = is_vdso_map(filename); |
| nsi = nsinfo__get(thread->nsinfo); |
| |
| if (vdso) { |
| /* The vdso maps are always on the host and not the |
| * container. Ensure that we don't use setns to look |
| * them up. |
| */ |
| nnsi = nsinfo__copy(nsi); |
| if (nnsi) { |
| nsinfo__put(nsi); |
| nsinfo__clear_need_setns(nnsi); |
| nsi = nnsi; |
| } |
| dso = machine__findnew_vdso(machine, thread); |
| } else { |
| dso = machine__findnew_dso_id(machine, filename, id); |
| } |
| |
| if (dso) { |
| mutex_lock(&dso->lock); |
| nsinfo__put(dso->nsinfo); |
| dso->nsinfo = nsi; |
| mutex_unlock(&dso->lock); |
| } else |
| nsinfo__put(nsi); |
| |
| thread__put(thread); |
| return dso; |
| } |
| |
| static int perf_event__repipe_buildid_mmap(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct machine *machine) |
| { |
| struct dso *dso; |
| |
| dso = findnew_dso(event->mmap.pid, event->mmap.tid, |
| event->mmap.filename, NULL, machine); |
| |
| if (dso && !dso->hit) { |
| dso->hit = 1; |
| dso__inject_build_id(dso, tool, machine, sample->cpumode, 0); |
| } |
| dso__put(dso); |
| |
| return perf_event__repipe(tool, event, sample, machine); |
| } |
| |
| 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); |
| |
| if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) { |
| struct dso *dso; |
| |
| dso = findnew_dso(event->mmap2.pid, event->mmap2.tid, |
| event->mmap2.filename, NULL, machine); |
| if (dso) { |
| /* mark it not to inject build-id */ |
| dso->hit = 1; |
| } |
| dso__put(dso); |
| } |
| |
| return err; |
| } |
| |
| #ifdef HAVE_JITDUMP |
| static int perf_event__jit_repipe_mmap2(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct machine *machine) |
| { |
| struct perf_inject *inject = container_of(tool, struct perf_inject, tool); |
| u64 n = 0; |
| int ret; |
| |
| /* |
| * if jit marker, then inject jit mmaps and generate ELF images |
| */ |
| ret = jit_process(inject->session, &inject->output, machine, |
| event->mmap2.filename, event->mmap2.pid, event->mmap2.tid, &n); |
| if (ret < 0) |
| return ret; |
| if (ret) { |
| inject->bytes_written += n; |
| return 0; |
| } |
| return perf_event__repipe_mmap2(tool, event, sample, machine); |
| } |
| #endif |
| |
| static int perf_event__repipe_buildid_mmap2(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct machine *machine) |
| { |
| struct dso_id dso_id = { |
| .maj = event->mmap2.maj, |
| .min = event->mmap2.min, |
| .ino = event->mmap2.ino, |
| .ino_generation = event->mmap2.ino_generation, |
| }; |
| struct dso *dso; |
| |
| if (event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID) { |
| /* cannot use dso_id since it'd have invalid info */ |
| dso = findnew_dso(event->mmap2.pid, event->mmap2.tid, |
| event->mmap2.filename, NULL, machine); |
| if (dso) { |
| /* mark it not to inject build-id */ |
| dso->hit = 1; |
| } |
| dso__put(dso); |
| return 0; |
| } |
| |
| dso = findnew_dso(event->mmap2.pid, event->mmap2.tid, |
| event->mmap2.filename, &dso_id, machine); |
| |
| if (dso && !dso->hit) { |
| dso->hit = 1; |
| dso__inject_build_id(dso, tool, machine, sample->cpumode, |
| event->mmap2.flags); |
| } |
| dso__put(dso); |
| |
| perf_event__repipe(tool, event, sample, machine); |
| |
| return 0; |
| } |
| |
| 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_namespaces(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct machine *machine) |
| { |
| int err = perf_event__process_namespaces(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; |
| } |
| |
| #ifdef HAVE_LIBTRACEEVENT |
| static int perf_event__repipe_tracing_data(struct perf_session *session, |
| union perf_event *event) |
| { |
| perf_event__repipe_synth(session->tool, event); |
| |
| return perf_event__process_tracing_data(session, event); |
| } |
| #endif |
| |
| static int dso__read_build_id(struct dso *dso) |
| { |
| struct nscookie nsc; |
| |
| if (dso->has_build_id) |
| return 0; |
| |
| mutex_lock(&dso->lock); |
| nsinfo__mountns_enter(dso->nsinfo, &nsc); |
| if (filename__read_build_id(dso->long_name, &dso->bid) > 0) |
| dso->has_build_id = true; |
| else if (dso->nsinfo) { |
| char *new_name; |
| |
| new_name = filename_with_chroot(dso->nsinfo->pid, |
| dso->long_name); |
| if (new_name && filename__read_build_id(new_name, &dso->bid) > 0) |
| dso->has_build_id = true; |
| free(new_name); |
| } |
| nsinfo__mountns_exit(&nsc); |
| mutex_unlock(&dso->lock); |
| |
| return dso->has_build_id ? 0 : -1; |
| } |
| |
| static struct strlist *perf_inject__parse_known_build_ids( |
| const char *known_build_ids_string) |
| { |
| struct str_node *pos, *tmp; |
| struct strlist *known_build_ids; |
| int bid_len; |
| |
| known_build_ids = strlist__new(known_build_ids_string, NULL); |
| if (known_build_ids == NULL) |
| return NULL; |
| strlist__for_each_entry_safe(pos, tmp, known_build_ids) { |
| const char *build_id, *dso_name; |
| |
| build_id = skip_spaces(pos->s); |
| dso_name = strchr(build_id, ' '); |
| if (dso_name == NULL) { |
| strlist__remove(known_build_ids, pos); |
| continue; |
| } |
| bid_len = dso_name - pos->s; |
| dso_name = skip_spaces(dso_name); |
| if (bid_len % 2 != 0 || bid_len >= SBUILD_ID_SIZE) { |
| strlist__remove(known_build_ids, pos); |
| continue; |
| } |
| for (int ix = 0; 2 * ix + 1 < bid_len; ++ix) { |
| if (!isxdigit(build_id[2 * ix]) || |
| !isxdigit(build_id[2 * ix + 1])) { |
| strlist__remove(known_build_ids, pos); |
| break; |
| } |
| } |
| } |
| return known_build_ids; |
| } |
| |
| static bool perf_inject__lookup_known_build_id(struct perf_inject *inject, |
| struct dso *dso) |
| { |
| struct str_node *pos; |
| int bid_len; |
| |
| strlist__for_each_entry(pos, inject->known_build_ids) { |
| const char *build_id, *dso_name; |
| |
| build_id = skip_spaces(pos->s); |
| dso_name = strchr(build_id, ' '); |
| bid_len = dso_name - pos->s; |
| dso_name = skip_spaces(dso_name); |
| if (strcmp(dso->long_name, dso_name)) |
| continue; |
| for (int ix = 0; 2 * ix + 1 < bid_len; ++ix) { |
| dso->bid.data[ix] = (hex(build_id[2 * ix]) << 4 | |
| hex(build_id[2 * ix + 1])); |
| } |
| dso->bid.size = bid_len / 2; |
| dso->has_build_id = 1; |
| return true; |
| } |
| return false; |
| } |
| |
| static int dso__inject_build_id(struct dso *dso, struct perf_tool *tool, |
| struct machine *machine, u8 cpumode, u32 flags) |
| { |
| struct perf_inject *inject = container_of(tool, struct perf_inject, |
| tool); |
| int err; |
| |
| if (is_anon_memory(dso->long_name) || flags & MAP_HUGETLB) |
| return 0; |
| if (is_no_dso_memory(dso->long_name)) |
| return 0; |
| |
| if (inject->known_build_ids != NULL && |
| perf_inject__lookup_known_build_id(inject, dso)) |
| return 1; |
| |
| if (dso__read_build_id(dso) < 0) { |
| pr_debug("no build_id found for %s\n", dso->long_name); |
| return -1; |
| } |
| |
| err = perf_event__synthesize_build_id(tool, dso, cpumode, |
| perf_event__repipe, machine); |
| if (err) { |
| pr_err("Can't synthesize build_id event for %s\n", dso->long_name); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| int perf_event__inject_buildid(struct perf_tool *tool, union perf_event *event, |
| struct perf_sample *sample, |
| struct evsel *evsel __maybe_unused, |
| struct machine *machine) |
| { |
| struct addr_location al; |
| struct thread *thread; |
| |
| 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; |
| } |
| |
| if (thread__find_map(thread, sample->cpumode, sample->ip, &al)) { |
| if (!al.map->dso->hit) { |
| al.map->dso->hit = 1; |
| dso__inject_build_id(al.map->dso, tool, machine, |
| sample->cpumode, al.map->flags); |
| } |
| } |
| |
| 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 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 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; |
| } |
| |
| #ifdef HAVE_LIBTRACEEVENT |
| static int perf_inject__sched_stat(struct perf_tool *tool, |
| union perf_event *event __maybe_unused, |
| struct perf_sample *sample, |
| struct 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 = 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]; |
| 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->core.attr.sample_type, |
| evsel->core.attr.read_format, &sample_sw); |
| build_id__mark_dso_hit(tool, event_sw, &sample_sw, evsel, machine); |
| return perf_event__repipe(tool, event_sw, &sample_sw, machine); |
| } |
| #endif |
| |
| static struct guest_vcpu *guest_session__vcpu(struct guest_session *gs, u32 vcpu) |
| { |
| if (realloc_array_as_needed(gs->vcpu, gs->vcpu_cnt, vcpu, NULL)) |
| return NULL; |
| return &gs->vcpu[vcpu]; |
| } |
| |
| static int guest_session__output_bytes(struct guest_session *gs, void *buf, size_t sz) |
| { |
| ssize_t ret = writen(gs->tmp_fd, buf, sz); |
| |
| return ret < 0 ? ret : 0; |
| } |
| |
| static int guest_session__repipe(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample __maybe_unused, |
| struct machine *machine __maybe_unused) |
| { |
| struct guest_session *gs = container_of(tool, struct guest_session, tool); |
| |
| return guest_session__output_bytes(gs, event, event->header.size); |
| } |
| |
| static int guest_session__map_tid(struct guest_session *gs, u32 tid, u32 vcpu) |
| { |
| struct guest_tid *guest_tid = zalloc(sizeof(*guest_tid)); |
| int hash; |
| |
| if (!guest_tid) |
| return -ENOMEM; |
| |
| guest_tid->tid = tid; |
| guest_tid->vcpu = vcpu; |
| hash = hash_32(guest_tid->tid, PERF_EVLIST__HLIST_BITS); |
| hlist_add_head(&guest_tid->node, &gs->tids[hash]); |
| |
| return 0; |
| } |
| |
| static int host_peek_vm_comms_cb(struct perf_session *session __maybe_unused, |
| union perf_event *event, |
| u64 offset __maybe_unused, void *data) |
| { |
| struct guest_session *gs = data; |
| unsigned int vcpu; |
| struct guest_vcpu *guest_vcpu; |
| int ret; |
| |
| if (event->header.type != PERF_RECORD_COMM || |
| event->comm.pid != gs->machine_pid) |
| return 0; |
| |
| /* |
| * QEMU option -name debug-threads=on, causes thread names formatted as |
| * below, although it is not an ABI. Also libvirt seems to use this by |
| * default. Here we rely on it to tell us which thread is which VCPU. |
| */ |
| ret = sscanf(event->comm.comm, "CPU %u/KVM", &vcpu); |
| if (ret <= 0) |
| return ret; |
| pr_debug("Found VCPU: tid %u comm %s vcpu %u\n", |
| event->comm.tid, event->comm.comm, vcpu); |
| if (vcpu > INT_MAX) { |
| pr_err("Invalid VCPU %u\n", vcpu); |
| return -EINVAL; |
| } |
| guest_vcpu = guest_session__vcpu(gs, vcpu); |
| if (!guest_vcpu) |
| return -ENOMEM; |
| if (guest_vcpu->tid && guest_vcpu->tid != event->comm.tid) { |
| pr_err("Fatal error: Two threads found with the same VCPU\n"); |
| return -EINVAL; |
| } |
| guest_vcpu->tid = event->comm.tid; |
| |
| return guest_session__map_tid(gs, event->comm.tid, vcpu); |
| } |
| |
| static int host_peek_vm_comms(struct perf_session *session, struct guest_session *gs) |
| { |
| return perf_session__peek_events(session, session->header.data_offset, |
| session->header.data_size, |
| host_peek_vm_comms_cb, gs); |
| } |
| |
| static bool evlist__is_id_used(struct evlist *evlist, u64 id) |
| { |
| return evlist__id2sid(evlist, id); |
| } |
| |
| static u64 guest_session__allocate_new_id(struct guest_session *gs, struct evlist *host_evlist) |
| { |
| do { |
| gs->highest_id += 1; |
| } while (!gs->highest_id || evlist__is_id_used(host_evlist, gs->highest_id)); |
| |
| return gs->highest_id; |
| } |
| |
| static int guest_session__map_id(struct guest_session *gs, u64 id, u64 host_id, u32 vcpu) |
| { |
| struct guest_id *guest_id = zalloc(sizeof(*guest_id)); |
| int hash; |
| |
| if (!guest_id) |
| return -ENOMEM; |
| |
| guest_id->id = id; |
| guest_id->host_id = host_id; |
| guest_id->vcpu = vcpu; |
| hash = hash_64(guest_id->id, PERF_EVLIST__HLIST_BITS); |
| hlist_add_head(&guest_id->node, &gs->heads[hash]); |
| |
| return 0; |
| } |
| |
| static u64 evlist__find_highest_id(struct evlist *evlist) |
| { |
| struct evsel *evsel; |
| u64 highest_id = 1; |
| |
| evlist__for_each_entry(evlist, evsel) { |
| u32 j; |
| |
| for (j = 0; j < evsel->core.ids; j++) { |
| u64 id = evsel->core.id[j]; |
| |
| if (id > highest_id) |
| highest_id = id; |
| } |
| } |
| |
| return highest_id; |
| } |
| |
| static int guest_session__map_ids(struct guest_session *gs, struct evlist *host_evlist) |
| { |
| struct evlist *evlist = gs->session->evlist; |
| struct evsel *evsel; |
| int ret; |
| |
| evlist__for_each_entry(evlist, evsel) { |
| u32 j; |
| |
| for (j = 0; j < evsel->core.ids; j++) { |
| struct perf_sample_id *sid; |
| u64 host_id; |
| u64 id; |
| |
| id = evsel->core.id[j]; |
| sid = evlist__id2sid(evlist, id); |
| if (!sid || sid->cpu.cpu == -1) |
| continue; |
| host_id = guest_session__allocate_new_id(gs, host_evlist); |
| ret = guest_session__map_id(gs, id, host_id, sid->cpu.cpu); |
| if (ret) |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static struct guest_id *guest_session__lookup_id(struct guest_session *gs, u64 id) |
| { |
| struct hlist_head *head; |
| struct guest_id *guest_id; |
| int hash; |
| |
| hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
| head = &gs->heads[hash]; |
| |
| hlist_for_each_entry(guest_id, head, node) |
| if (guest_id->id == id) |
| return guest_id; |
| |
| return NULL; |
| } |
| |
| static int process_attr(struct perf_tool *tool, union perf_event *event, |
| struct perf_sample *sample __maybe_unused, |
| struct machine *machine __maybe_unused) |
| { |
| struct perf_inject *inject = container_of(tool, struct perf_inject, tool); |
| |
| return perf_event__process_attr(tool, event, &inject->session->evlist); |
| } |
| |
| static int guest_session__add_attr(struct guest_session *gs, struct evsel *evsel) |
| { |
| struct perf_inject *inject = container_of(gs, struct perf_inject, guest_session); |
| struct perf_event_attr attr = evsel->core.attr; |
| u64 *id_array; |
| u32 *vcpu_array; |
| int ret = -ENOMEM; |
| u32 i; |
| |
| id_array = calloc(evsel->core.ids, sizeof(*id_array)); |
| if (!id_array) |
| return -ENOMEM; |
| |
| vcpu_array = calloc(evsel->core.ids, sizeof(*vcpu_array)); |
| if (!vcpu_array) |
| goto out; |
| |
| for (i = 0; i < evsel->core.ids; i++) { |
| u64 id = evsel->core.id[i]; |
| struct guest_id *guest_id = guest_session__lookup_id(gs, id); |
| |
| if (!guest_id) { |
| pr_err("Failed to find guest id %"PRIu64"\n", id); |
| ret = -EINVAL; |
| goto out; |
| } |
| id_array[i] = guest_id->host_id; |
| vcpu_array[i] = guest_id->vcpu; |
| } |
| |
| attr.sample_type |= PERF_SAMPLE_IDENTIFIER; |
| attr.exclude_host = 1; |
| attr.exclude_guest = 0; |
| |
| ret = perf_event__synthesize_attr(&inject->tool, &attr, evsel->core.ids, |
| id_array, process_attr); |
| if (ret) |
| pr_err("Failed to add guest attr.\n"); |
| |
| for (i = 0; i < evsel->core.ids; i++) { |
| struct perf_sample_id *sid; |
| u32 vcpu = vcpu_array[i]; |
| |
| sid = evlist__id2sid(inject->session->evlist, id_array[i]); |
| /* Guest event is per-thread from the host point of view */ |
| sid->cpu.cpu = -1; |
| sid->tid = gs->vcpu[vcpu].tid; |
| sid->machine_pid = gs->machine_pid; |
| sid->vcpu.cpu = vcpu; |
| } |
| out: |
| free(vcpu_array); |
| free(id_array); |
| return ret; |
| } |
| |
| static int guest_session__add_attrs(struct guest_session *gs) |
| { |
| struct evlist *evlist = gs->session->evlist; |
| struct evsel *evsel; |
| int ret; |
| |
| evlist__for_each_entry(evlist, evsel) { |
| ret = guest_session__add_attr(gs, evsel); |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int synthesize_id_index(struct perf_inject *inject, size_t new_cnt) |
| { |
| struct perf_session *session = inject->session; |
| struct evlist *evlist = session->evlist; |
| struct machine *machine = &session->machines.host; |
| size_t from = evlist->core.nr_entries - new_cnt; |
| |
| return __perf_event__synthesize_id_index(&inject->tool, perf_event__repipe, |
| evlist, machine, from); |
| } |
| |
| static struct guest_tid *guest_session__lookup_tid(struct guest_session *gs, u32 tid) |
| { |
| struct hlist_head *head; |
| struct guest_tid *guest_tid; |
| int hash; |
| |
| hash = hash_32(tid, PERF_EVLIST__HLIST_BITS); |
| head = &gs->tids[hash]; |
| |
| hlist_for_each_entry(guest_tid, head, node) |
| if (guest_tid->tid == tid) |
| return guest_tid; |
| |
| return NULL; |
| } |
| |
| static bool dso__is_in_kernel_space(struct dso *dso) |
| { |
| if (dso__is_vdso(dso)) |
| return false; |
| |
| return dso__is_kcore(dso) || |
| dso->kernel || |
| is_kernel_module(dso->long_name, PERF_RECORD_MISC_CPUMODE_UNKNOWN); |
| } |
| |
| static u64 evlist__first_id(struct evlist *evlist) |
| { |
| struct evsel *evsel; |
| |
| evlist__for_each_entry(evlist, evsel) { |
| if (evsel->core.ids) |
| return evsel->core.id[0]; |
| } |
| return 0; |
| } |
| |
| static int process_build_id(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample __maybe_unused, |
| struct machine *machine __maybe_unused) |
| { |
| struct perf_inject *inject = container_of(tool, struct perf_inject, tool); |
| |
| return perf_event__process_build_id(inject->session, event); |
| } |
| |
| static int synthesize_build_id(struct perf_inject *inject, struct dso *dso, pid_t machine_pid) |
| { |
| struct machine *machine = perf_session__findnew_machine(inject->session, machine_pid); |
| u8 cpumode = dso__is_in_kernel_space(dso) ? |
| PERF_RECORD_MISC_GUEST_KERNEL : |
| PERF_RECORD_MISC_GUEST_USER; |
| |
| if (!machine) |
| return -ENOMEM; |
| |
| dso->hit = 1; |
| |
| return perf_event__synthesize_build_id(&inject->tool, dso, cpumode, |
| process_build_id, machine); |
| } |
| |
| static int guest_session__add_build_ids(struct guest_session *gs) |
| { |
| struct perf_inject *inject = container_of(gs, struct perf_inject, guest_session); |
| struct machine *machine = &gs->session->machines.host; |
| struct dso *dso; |
| int ret; |
| |
| /* Build IDs will be put in the Build ID feature section */ |
| perf_header__set_feat(&inject->session->header, HEADER_BUILD_ID); |
| |
| dsos__for_each_with_build_id(dso, &machine->dsos.head) { |
| ret = synthesize_build_id(inject, dso, gs->machine_pid); |
| if (ret) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static int guest_session__ksymbol_event(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample __maybe_unused, |
| struct machine *machine __maybe_unused) |
| { |
| struct guest_session *gs = container_of(tool, struct guest_session, tool); |
| |
| /* Only support out-of-line i.e. no BPF support */ |
| if (event->ksymbol.ksym_type != PERF_RECORD_KSYMBOL_TYPE_OOL) |
| return 0; |
| |
| return guest_session__output_bytes(gs, event, event->header.size); |
| } |
| |
| static int guest_session__start(struct guest_session *gs, const char *name, bool force) |
| { |
| char tmp_file_name[] = "/tmp/perf-inject-guest_session-XXXXXX"; |
| struct perf_session *session; |
| int ret; |
| |
| /* Only these events will be injected */ |
| gs->tool.mmap = guest_session__repipe; |
| gs->tool.mmap2 = guest_session__repipe; |
| gs->tool.comm = guest_session__repipe; |
| gs->tool.fork = guest_session__repipe; |
| gs->tool.exit = guest_session__repipe; |
| gs->tool.lost = guest_session__repipe; |
| gs->tool.context_switch = guest_session__repipe; |
| gs->tool.ksymbol = guest_session__ksymbol_event; |
| gs->tool.text_poke = guest_session__repipe; |
| /* |
| * Processing a build ID creates a struct dso with that build ID. Later, |
| * all guest dsos are iterated and the build IDs processed into the host |
| * session where they will be output to the Build ID feature section |
| * when the perf.data file header is written. |
| */ |
| gs->tool.build_id = perf_event__process_build_id; |
| /* Process the id index to know what VCPU an ID belongs to */ |
| gs->tool.id_index = perf_event__process_id_index; |
| |
| gs->tool.ordered_events = true; |
| gs->tool.ordering_requires_timestamps = true; |
| |
| gs->data.path = name; |
| gs->data.force = force; |
| gs->data.mode = PERF_DATA_MODE_READ; |
| |
| session = perf_session__new(&gs->data, &gs->tool); |
| if (IS_ERR(session)) |
| return PTR_ERR(session); |
| gs->session = session; |
| |
| /* |
| * Initial events have zero'd ID samples. Get default ID sample size |
| * used for removing them. |
| */ |
| gs->dflt_id_hdr_size = session->machines.host.id_hdr_size; |
| /* And default ID for adding back a host-compatible ID sample */ |
| gs->dflt_id = evlist__first_id(session->evlist); |
| if (!gs->dflt_id) { |
| pr_err("Guest data has no sample IDs"); |
| return -EINVAL; |
| } |
| |
| /* Temporary file for guest events */ |
| gs->tmp_file_name = strdup(tmp_file_name); |
| if (!gs->tmp_file_name) |
| return -ENOMEM; |
| gs->tmp_fd = mkstemp(gs->tmp_file_name); |
| if (gs->tmp_fd < 0) |
| return -errno; |
| |
| if (zstd_init(&gs->session->zstd_data, 0) < 0) |
| pr_warning("Guest session decompression initialization failed.\n"); |
| |
| /* |
| * perf does not support processing 2 sessions simultaneously, so output |
| * guest events to a temporary file. |
| */ |
| ret = perf_session__process_events(gs->session); |
| if (ret) |
| return ret; |
| |
| if (lseek(gs->tmp_fd, 0, SEEK_SET)) |
| return -errno; |
| |
| return 0; |
| } |
| |
| /* Free hlist nodes assuming hlist_node is the first member of hlist entries */ |
| static void free_hlist(struct hlist_head *heads, size_t hlist_sz) |
| { |
| struct hlist_node *pos, *n; |
| size_t i; |
| |
| for (i = 0; i < hlist_sz; ++i) { |
| hlist_for_each_safe(pos, n, &heads[i]) { |
| hlist_del(pos); |
| free(pos); |
| } |
| } |
| } |
| |
| static void guest_session__exit(struct guest_session *gs) |
| { |
| if (gs->session) { |
| perf_session__delete(gs->session); |
| free_hlist(gs->heads, PERF_EVLIST__HLIST_SIZE); |
| free_hlist(gs->tids, PERF_EVLIST__HLIST_SIZE); |
| } |
| if (gs->tmp_file_name) { |
| if (gs->tmp_fd >= 0) |
| close(gs->tmp_fd); |
| unlink(gs->tmp_file_name); |
| free(gs->tmp_file_name); |
| } |
| free(gs->vcpu); |
| free(gs->perf_data_file); |
| } |
| |
| static void get_tsc_conv(struct perf_tsc_conversion *tc, struct perf_record_time_conv *time_conv) |
| { |
| tc->time_shift = time_conv->time_shift; |
| tc->time_mult = time_conv->time_mult; |
| tc->time_zero = time_conv->time_zero; |
| tc->time_cycles = time_conv->time_cycles; |
| tc->time_mask = time_conv->time_mask; |
| tc->cap_user_time_zero = time_conv->cap_user_time_zero; |
| tc->cap_user_time_short = time_conv->cap_user_time_short; |
| } |
| |
| static void guest_session__get_tc(struct guest_session *gs) |
| { |
| struct perf_inject *inject = container_of(gs, struct perf_inject, guest_session); |
| |
| get_tsc_conv(&gs->host_tc, &inject->session->time_conv); |
| get_tsc_conv(&gs->guest_tc, &gs->session->time_conv); |
| } |
| |
| static void guest_session__convert_time(struct guest_session *gs, u64 guest_time, u64 *host_time) |
| { |
| u64 tsc; |
| |
| if (!guest_time) { |
| *host_time = 0; |
| return; |
| } |
| |
| if (gs->guest_tc.cap_user_time_zero) |
| tsc = perf_time_to_tsc(guest_time, &gs->guest_tc); |
| else |
| tsc = guest_time; |
| |
| /* |
| * This is the correct order of operations for x86 if the TSC Offset and |
| * Multiplier values are used. |
| */ |
| tsc -= gs->time_offset; |
| tsc /= gs->time_scale; |
| |
| if (gs->host_tc.cap_user_time_zero) |
| *host_time = tsc_to_perf_time(tsc, &gs->host_tc); |
| else |
| *host_time = tsc; |
| } |
| |
| static int guest_session__fetch(struct guest_session *gs) |
| { |
| void *buf = gs->ev.event_buf; |
| struct perf_event_header *hdr = buf; |
| size_t hdr_sz = sizeof(*hdr); |
| ssize_t ret; |
| |
| ret = readn(gs->tmp_fd, buf, hdr_sz); |
| if (ret < 0) |
| return ret; |
| |
| if (!ret) { |
| /* Zero size means EOF */ |
| hdr->size = 0; |
| return 0; |
| } |
| |
| buf += hdr_sz; |
| |
| ret = readn(gs->tmp_fd, buf, hdr->size - hdr_sz); |
| if (ret < 0) |
| return ret; |
| |
| gs->ev.event = (union perf_event *)gs->ev.event_buf; |
| gs->ev.sample.time = 0; |
| |
| if (hdr->type >= PERF_RECORD_USER_TYPE_START) { |
| pr_err("Unexpected type fetching guest event"); |
| return 0; |
| } |
| |
| ret = evlist__parse_sample(gs->session->evlist, gs->ev.event, &gs->ev.sample); |
| if (ret) { |
| pr_err("Parse failed fetching guest event"); |
| return ret; |
| } |
| |
| if (!gs->have_tc) { |
| guest_session__get_tc(gs); |
| gs->have_tc = true; |
| } |
| |
| guest_session__convert_time(gs, gs->ev.sample.time, &gs->ev.sample.time); |
| |
| return 0; |
| } |
| |
| static int evlist__append_id_sample(struct evlist *evlist, union perf_event *ev, |
| const struct perf_sample *sample) |
| { |
| struct evsel *evsel; |
| void *array; |
| int ret; |
| |
| evsel = evlist__id2evsel(evlist, sample->id); |
| array = ev; |
| |
| if (!evsel) { |
| pr_err("No evsel for id %"PRIu64"\n", sample->id); |
| return -EINVAL; |
| } |
| |
| array += ev->header.size; |
| ret = perf_event__synthesize_id_sample(array, evsel->core.attr.sample_type, sample); |
| if (ret < 0) |
| return ret; |
| |
| if (ret & 7) { |
| pr_err("Bad id sample size %d\n", ret); |
| return -EINVAL; |
| } |
| |
| ev->header.size += ret; |
| |
| return 0; |
| } |
| |
| static int guest_session__inject_events(struct guest_session *gs, u64 timestamp) |
| { |
| struct perf_inject *inject = container_of(gs, struct perf_inject, guest_session); |
| int ret; |
| |
| if (!gs->ready) |
| return 0; |
| |
| while (1) { |
| struct perf_sample *sample; |
| struct guest_id *guest_id; |
| union perf_event *ev; |
| u16 id_hdr_size; |
| u8 cpumode; |
| u64 id; |
| |
| if (!gs->fetched) { |
| ret = guest_session__fetch(gs); |
| if (ret) |
| return ret; |
| gs->fetched = true; |
| } |
| |
| ev = gs->ev.event; |
| sample = &gs->ev.sample; |
| |
| if (!ev->header.size) |
| return 0; /* EOF */ |
| |
| if (sample->time > timestamp) |
| return 0; |
| |
| /* Change cpumode to guest */ |
| cpumode = ev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; |
| if (cpumode & PERF_RECORD_MISC_USER) |
| cpumode = PERF_RECORD_MISC_GUEST_USER; |
| else |
| cpumode = PERF_RECORD_MISC_GUEST_KERNEL; |
| ev->header.misc &= ~PERF_RECORD_MISC_CPUMODE_MASK; |
| ev->header.misc |= cpumode; |
| |
| id = sample->id; |
| if (!id) { |
| id = gs->dflt_id; |
| id_hdr_size = gs->dflt_id_hdr_size; |
| } else { |
| struct evsel *evsel = evlist__id2evsel(gs->session->evlist, id); |
| |
| id_hdr_size = evsel__id_hdr_size(evsel); |
| } |
| |
| if (id_hdr_size & 7) { |
| pr_err("Bad id_hdr_size %u\n", id_hdr_size); |
| return -EINVAL; |
| } |
| |
| if (ev->header.size & 7) { |
| pr_err("Bad event size %u\n", ev->header.size); |
| return -EINVAL; |
| } |
| |
| /* Remove guest id sample */ |
| ev->header.size -= id_hdr_size; |
| |
| if (ev->header.size & 7) { |
| pr_err("Bad raw event size %u\n", ev->header.size); |
| return -EINVAL; |
| } |
| |
| guest_id = guest_session__lookup_id(gs, id); |
| if (!guest_id) { |
| pr_err("Guest event with unknown id %llu\n", |
| (unsigned long long)id); |
| return -EINVAL; |
| } |
| |
| /* Change to host ID to avoid conflicting ID values */ |
| sample->id = guest_id->host_id; |
| sample->stream_id = guest_id->host_id; |
| |
| if (sample->cpu != (u32)-1) { |
| if (sample->cpu >= gs->vcpu_cnt) { |
| pr_err("Guest event with unknown VCPU %u\n", |
| sample->cpu); |
| return -EINVAL; |
| } |
| /* Change to host CPU instead of guest VCPU */ |
| sample->cpu = gs->vcpu[sample->cpu].cpu; |
| } |
| |
| /* New id sample with new ID and CPU */ |
| ret = evlist__append_id_sample(inject->session->evlist, ev, sample); |
| if (ret) |
| return ret; |
| |
| if (ev->header.size & 7) { |
| pr_err("Bad new event size %u\n", ev->header.size); |
| return -EINVAL; |
| } |
| |
| gs->fetched = false; |
| |
| ret = output_bytes(inject, ev, ev->header.size); |
| if (ret) |
| return ret; |
| } |
| } |
| |
| static int guest_session__flush_events(struct guest_session *gs) |
| { |
| return guest_session__inject_events(gs, -1); |
| } |
| |
| static int host__repipe(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct machine *machine) |
| { |
| struct perf_inject *inject = container_of(tool, struct perf_inject, tool); |
| int ret; |
| |
| ret = guest_session__inject_events(&inject->guest_session, sample->time); |
| if (ret) |
| return ret; |
| |
| return perf_event__repipe(tool, event, sample, machine); |
| } |
| |
| static int host__finished_init(struct perf_session *session, union perf_event *event) |
| { |
| struct perf_inject *inject = container_of(session->tool, struct perf_inject, tool); |
| struct guest_session *gs = &inject->guest_session; |
| int ret; |
| |
| /* |
| * Peek through host COMM events to find QEMU threads and the VCPU they |
| * are running. |
| */ |
| ret = host_peek_vm_comms(session, gs); |
| if (ret) |
| return ret; |
| |
| if (!gs->vcpu_cnt) { |
| pr_err("No VCPU threads found for pid %u\n", gs->machine_pid); |
| return -EINVAL; |
| } |
| |
| /* |
| * Allocate new (unused) host sample IDs and map them to the guest IDs. |
| */ |
| gs->highest_id = evlist__find_highest_id(session->evlist); |
| ret = guest_session__map_ids(gs, session->evlist); |
| if (ret) |
| return ret; |
| |
| ret = guest_session__add_attrs(gs); |
| if (ret) |
| return ret; |
| |
| ret = synthesize_id_index(inject, gs->session->evlist->core.nr_entries); |
| if (ret) { |
| pr_err("Failed to synthesize id_index\n"); |
| return ret; |
| } |
| |
| ret = guest_session__add_build_ids(gs); |
| if (ret) { |
| pr_err("Failed to add guest build IDs\n"); |
| return ret; |
| } |
| |
| gs->ready = true; |
| |
| ret = guest_session__inject_events(gs, 0); |
| if (ret) |
| return ret; |
| |
| return perf_event__repipe_op2_synth(session, event); |
| } |
| |
| /* |
| * Obey finished-round ordering. The FINISHED_ROUND event is first processed |
| * which flushes host events to file up until the last flush time. Then inject |
| * guest events up to the same time. Finally write out the FINISHED_ROUND event |
| * itself. |
| */ |
| static int host__finished_round(struct perf_tool *tool, |
| union perf_event *event, |
| struct ordered_events *oe) |
| { |
| struct perf_inject *inject = container_of(tool, struct perf_inject, tool); |
| int ret = perf_event__process_finished_round(tool, event, oe); |
| u64 timestamp = ordered_events__last_flush_time(oe); |
| |
| if (ret) |
| return ret; |
| |
| ret = guest_session__inject_events(&inject->guest_session, timestamp); |
| if (ret) |
| return ret; |
| |
| return perf_event__repipe_oe_synth(tool, event, oe); |
| } |
| |
| static int host__context_switch(struct perf_tool *tool, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct machine *machine) |
| { |
| struct perf_inject *inject = container_of(tool, struct perf_inject, tool); |
| bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; |
| struct guest_session *gs = &inject->guest_session; |
| u32 pid = event->context_switch.next_prev_pid; |
| u32 tid = event->context_switch.next_prev_tid; |
| struct guest_tid *guest_tid; |
| u32 vcpu; |
| |
| if (out || pid != gs->machine_pid) |
| goto out; |
| |
| guest_tid = guest_session__lookup_tid(gs, tid); |
| if (!guest_tid) |
| goto out; |
| |
| if (sample->cpu == (u32)-1) { |
| pr_err("Switch event does not have CPU\n"); |
| return -EINVAL; |
| } |
| |
| vcpu = guest_tid->vcpu; |
| if (vcpu >= gs->vcpu_cnt) |
| return -EINVAL; |
| |
| /* Guest is switching in, record which CPU the VCPU is now running on */ |
| gs->vcpu[vcpu].cpu = sample->cpu; |
| out: |
| return host__repipe(tool, event, sample, machine); |
| } |
| |
| static void sig_handler(int sig __maybe_unused) |
| { |
| session_done = 1; |
| } |
| |
| static int evsel__check_stype(struct evsel *evsel, u64 sample_type, const char *sample_msg) |
| { |
| struct perf_event_attr *attr = &evsel->core.attr; |
| const char *name = 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 evsel *evsel __maybe_unused, |
| struct machine *machine __maybe_unused) |
| { |
| return 0; |
| } |
| |
| static void strip_init(struct perf_inject *inject) |
| { |
| struct evlist *evlist = inject->session->evlist; |
| struct evsel *evsel; |
| |
| inject->tool.context_switch = perf_event__drop; |
| |
| evlist__for_each_entry(evlist, evsel) |
| evsel->handler = drop_sample; |
| } |
| |
| static int parse_vm_time_correlation(const struct option *opt, const char *str, int unset) |
| { |
| struct perf_inject *inject = opt->value; |
| const char *args; |
| char *dry_run; |
| |
| if (unset) |
| return 0; |
| |
| inject->itrace_synth_opts.set = true; |
| inject->itrace_synth_opts.vm_time_correlation = true; |
| inject->in_place_update = true; |
| |
| if (!str) |
| return 0; |
| |
| dry_run = skip_spaces(str); |
| if (!strncmp(dry_run, "dry-run", strlen("dry-run"))) { |
| inject->itrace_synth_opts.vm_tm_corr_dry_run = true; |
| inject->in_place_update_dry_run = true; |
| args = dry_run + strlen("dry-run"); |
| } else { |
| args = str; |
| } |
| |
| inject->itrace_synth_opts.vm_tm_corr_args = strdup(args); |
| |
| return inject->itrace_synth_opts.vm_tm_corr_args ? 0 : -ENOMEM; |
| } |
| |
| static int parse_guest_data(const struct option *opt, const char *str, int unset) |
| { |
| struct perf_inject *inject = opt->value; |
| struct guest_session *gs = &inject->guest_session; |
| char *tok; |
| char *s; |
| |
| if (unset) |
| return 0; |
| |
| if (!str) |
| goto bad_args; |
| |
| s = strdup(str); |
| if (!s) |
| return -ENOMEM; |
| |
| gs->perf_data_file = strsep(&s, ","); |
| if (!gs->perf_data_file) |
| goto bad_args; |
| |
| gs->copy_kcore_dir = has_kcore_dir(gs->perf_data_file); |
| if (gs->copy_kcore_dir) |
| inject->output.is_dir = true; |
| |
| tok = strsep(&s, ","); |
| if (!tok) |
| goto bad_args; |
| gs->machine_pid = strtoul(tok, NULL, 0); |
| if (!inject->guest_session.machine_pid) |
| goto bad_args; |
| |
| gs->time_scale = 1; |
| |
| tok = strsep(&s, ","); |
| if (!tok) |
| goto out; |
| gs->time_offset = strtoull(tok, NULL, 0); |
| |
| tok = strsep(&s, ","); |
| if (!tok) |
| goto out; |
| gs->time_scale = strtod(tok, NULL); |
| if (!gs->time_scale) |
| goto bad_args; |
| out: |
| return 0; |
| |
| bad_args: |
| pr_err("--guest-data option requires guest perf.data file name, " |
| "guest machine PID, and optionally guest timestamp offset, " |
| "and guest timestamp scale factor, separated by commas.\n"); |
| return -1; |
| } |
| |
| static int save_section_info_cb(struct perf_file_section *section, |
| struct perf_header *ph __maybe_unused, |
| int feat, int fd __maybe_unused, void *data) |
| { |
| struct perf_inject *inject = data; |
| |
| inject->secs[feat] = *section; |
| return 0; |
| } |
| |
| static int save_section_info(struct perf_inject *inject) |
| { |
| struct perf_header *header = &inject->session->header; |
| int fd = perf_data__fd(inject->session->data); |
| |
| return perf_header__process_sections(header, fd, inject, save_section_info_cb); |
| } |
| |
| static bool keep_feat(int feat) |
| { |
| switch (feat) { |
| /* Keep original information that describes the machine or software */ |
| case HEADER_TRACING_DATA: |
| case HEADER_HOSTNAME: |
| case HEADER_OSRELEASE: |
| case HEADER_VERSION: |
| case HEADER_ARCH: |
| case HEADER_NRCPUS: |
| case HEADER_CPUDESC: |
| case HEADER_CPUID: |
| case HEADER_TOTAL_MEM: |
| case HEADER_CPU_TOPOLOGY: |
| case HEADER_NUMA_TOPOLOGY: |
| case HEADER_PMU_MAPPINGS: |
| case HEADER_CACHE: |
| case HEADER_MEM_TOPOLOGY: |
| case HEADER_CLOCKID: |
| case HEADER_BPF_PROG_INFO: |
| case HEADER_BPF_BTF: |
| case HEADER_CPU_PMU_CAPS: |
| case HEADER_CLOCK_DATA: |
| case HEADER_HYBRID_TOPOLOGY: |
| case HEADER_PMU_CAPS: |
| return true; |
| /* Information that can be updated */ |
| case HEADER_BUILD_ID: |
| case HEADER_CMDLINE: |
| case HEADER_EVENT_DESC: |
| case HEADER_BRANCH_STACK: |
| case HEADER_GROUP_DESC: |
| case HEADER_AUXTRACE: |
| case HEADER_STAT: |
| case HEADER_SAMPLE_TIME: |
| case HEADER_DIR_FORMAT: |
| case HEADER_COMPRESSED: |
| default: |
| return false; |
| }; |
| } |
| |
| static int read_file(int fd, u64 offs, void *buf, size_t sz) |
| { |
| ssize_t ret = preadn(fd, buf, sz, offs); |
| |
| if (ret < 0) |
| return -errno; |
| if ((size_t)ret != sz) |
| return -EINVAL; |
| return 0; |
| } |
| |
| static int feat_copy(struct perf_inject *inject, int feat, struct feat_writer *fw) |
| { |
| int fd = perf_data__fd(inject->session->data); |
| u64 offs = inject->secs[feat].offset; |
| size_t sz = inject->secs[feat].size; |
| void *buf = malloc(sz); |
| int ret; |
| |
| if (!buf) |
| return -ENOMEM; |
| |
| ret = read_file(fd, offs, buf, sz); |
| if (ret) |
| goto out_free; |
| |
| ret = fw->write(fw, buf, sz); |
| out_free: |
| free(buf); |
| return ret; |
| } |
| |
| struct inject_fc { |
| struct feat_copier fc; |
| struct perf_inject *inject; |
| }; |
| |
| static int feat_copy_cb(struct feat_copier *fc, int feat, struct feat_writer *fw) |
| { |
| struct inject_fc *inj_fc = container_of(fc, struct inject_fc, fc); |
| struct perf_inject *inject = inj_fc->inject; |
| int ret; |
| |
| if (!inject->secs[feat].offset || |
| !keep_feat(feat)) |
| return 0; |
| |
| ret = feat_copy(inject, feat, fw); |
| if (ret < 0) |
| return ret; |
| |
| return 1; /* Feature section copied */ |
| } |
| |
| static int copy_kcore_dir(struct perf_inject *inject) |
| { |
| char *cmd; |
| int ret; |
| |
| ret = asprintf(&cmd, "cp -r -n %s/kcore_dir* %s >/dev/null 2>&1", |
| inject->input_name, inject->output.path); |
| if (ret < 0) |
| return ret; |
| pr_debug("%s\n", cmd); |
| ret = system(cmd); |
| free(cmd); |
| return ret; |
| } |
| |
| static int guest_session__copy_kcore_dir(struct guest_session *gs) |
| { |
| struct perf_inject *inject = container_of(gs, struct perf_inject, guest_session); |
| char *cmd; |
| int ret; |
| |
| ret = asprintf(&cmd, "cp -r -n %s/kcore_dir %s/kcore_dir__%u >/dev/null 2>&1", |
| gs->perf_data_file, inject->output.path, gs->machine_pid); |
| if (ret < 0) |
| return ret; |
| pr_debug("%s\n", cmd); |
| ret = system(cmd); |
| free(cmd); |
| return ret; |
| } |
| |
| static int output_fd(struct perf_inject *inject) |
| { |
| return inject->in_place_update ? -1 : perf_data__fd(&inject->output); |
| } |
| |
| static int __cmd_inject(struct perf_inject *inject) |
| { |
| int ret = -EINVAL; |
| struct guest_session *gs = &inject->guest_session; |
| struct perf_session *session = inject->session; |
| int fd = output_fd(inject); |
| u64 output_data_offset; |
| |
| signal(SIGINT, sig_handler); |
| |
| if (inject->build_ids || inject->sched_stat || |
| inject->itrace_synth_opts.set || inject->build_id_all) { |
| inject->tool.mmap = perf_event__repipe_mmap; |
| inject->tool.mmap2 = perf_event__repipe_mmap2; |
| inject->tool.fork = perf_event__repipe_fork; |
| #ifdef HAVE_LIBTRACEEVENT |
| inject->tool.tracing_data = perf_event__repipe_tracing_data; |
| #endif |
| } |
| |
| output_data_offset = perf_session__data_offset(session->evlist); |
| |
| if (inject->build_id_all) { |
| inject->tool.mmap = perf_event__repipe_buildid_mmap; |
| inject->tool.mmap2 = perf_event__repipe_buildid_mmap2; |
| } else if (inject->build_ids) { |
| inject->tool.sample = perf_event__inject_buildid; |
| } else if (inject->sched_stat) { |
| struct evsel *evsel; |
| |
| evlist__for_each_entry(session->evlist, evsel) { |
| const char *name = evsel__name(evsel); |
| |
| if (!strcmp(name, "sched:sched_switch")) { |
| if (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; |
| #ifdef HAVE_LIBTRACEEVENT |
| else if (!strncmp(name, "sched:sched_stat_", 17)) |
| evsel->handler = perf_inject__sched_stat; |
| #endif |
| } |
| } else if (inject->itrace_synth_opts.vm_time_correlation) { |
| session->itrace_synth_opts = &inject->itrace_synth_opts; |
| memset(&inject->tool, 0, sizeof(inject->tool)); |
| inject->tool.id_index = perf_event__process_id_index; |
| inject->tool.auxtrace_info = perf_event__process_auxtrace_info; |
| inject->tool.auxtrace = perf_event__process_auxtrace; |
| inject->tool.auxtrace_error = perf_event__process_auxtrace_error; |
| inject->tool.ordered_events = true; |
| inject->tool.ordering_requires_timestamps = true; |
| } 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.namespaces = perf_event__repipe_namespaces; |
| inject->tool.exit = perf_event__repipe_exit; |
| inject->tool.id_index = perf_event__process_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.aux_output_hw_id = 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 = roundup(8192 + session->header.data_offset, 4096); |
| if (inject->strip) |
| strip_init(inject); |
| } else if (gs->perf_data_file) { |
| char *name = gs->perf_data_file; |
| |
| /* |
| * Not strictly necessary, but keep these events in order wrt |
| * guest events. |
| */ |
| inject->tool.mmap = host__repipe; |
| inject->tool.mmap2 = host__repipe; |
| inject->tool.comm = host__repipe; |
| inject->tool.fork = host__repipe; |
| inject->tool.exit = host__repipe; |
| inject->tool.lost = host__repipe; |
| inject->tool.context_switch = host__repipe; |
| inject->tool.ksymbol = host__repipe; |
| inject->tool.text_poke = host__repipe; |
| /* |
| * Once the host session has initialized, set up sample ID |
| * mapping and feed in guest attrs, build IDs and initial |
| * events. |
| */ |
| inject->tool.finished_init = host__finished_init; |
| /* Obey finished round ordering */ |
| inject->tool.finished_round = host__finished_round, |
| /* Keep track of which CPU a VCPU is runnng on */ |
| inject->tool.context_switch = host__context_switch; |
| /* |
| * Must order events to be able to obey finished round |
| * ordering. |
| */ |
| inject->tool.ordered_events = true; |
| inject->tool.ordering_requires_timestamps = true; |
| /* Set up a separate session to process guest perf.data file */ |
| ret = guest_session__start(gs, name, session->data->force); |
| if (ret) { |
| pr_err("Failed to process %s, error %d\n", name, ret); |
| return ret; |
| } |
| /* Allow space in the header for guest attributes */ |
| output_data_offset += gs->session->header.data_offset; |
| output_data_offset = roundup(output_data_offset, 4096); |
| } |
| |
| if (!inject->itrace_synth_opts.set) |
| auxtrace_index__free(&session->auxtrace_index); |
| |
| if (!inject->is_pipe && !inject->in_place_update) |
| lseek(fd, output_data_offset, SEEK_SET); |
| |
| ret = perf_session__process_events(session); |
| if (ret) |
| return ret; |
| |
| if (gs->session) { |
| /* |
| * Remaining guest events have later timestamps. Flush them |
| * out to file. |
| */ |
| ret = guest_session__flush_events(gs); |
| if (ret) { |
| pr_err("Failed to flush guest events\n"); |
| return ret; |
| } |
| } |
| |
| if (!inject->is_pipe && !inject->in_place_update) { |
| struct inject_fc inj_fc = { |
| .fc.copy = feat_copy_cb, |
| .inject = inject, |
| }; |
| |
| if (inject->build_ids) |
| perf_header__set_feat(&session->header, |
| HEADER_BUILD_ID); |
| /* |
| * Keep all buildids when there is unprocessed AUX data because |
| * it is not known which ones the AUX trace hits. |
| */ |
| if (perf_header__has_feat(&session->header, HEADER_BUILD_ID) && |
| inject->have_auxtrace && !inject->itrace_synth_opts.set) |
| dsos__hit_all(session); |
| /* |
| * The AUX areas have been removed and replaced with |
| * synthesized hardware events, so clear the feature flag. |
| */ |
| if (inject->itrace_synth_opts.set) { |
| perf_header__clear_feat(&session->header, |
| HEADER_AUXTRACE); |
| if (inject->itrace_synth_opts.last_branch || |
| inject->itrace_synth_opts.add_last_branch) |
| perf_header__set_feat(&session->header, |
| HEADER_BRANCH_STACK); |
| } |
| session->header.data_offset = output_data_offset; |
| session->header.data_size = inject->bytes_written; |
| perf_session__inject_header(session, session->evlist, fd, &inj_fc.fc); |
| |
| if (inject->copy_kcore_dir) { |
| ret = copy_kcore_dir(inject); |
| if (ret) { |
| pr_err("Failed to copy kcore\n"); |
| return ret; |
| } |
| } |
| if (gs->copy_kcore_dir) { |
| ret = guest_session__copy_kcore_dir(gs); |
| if (ret) { |
| pr_err("Failed to copy guest kcore\n"); |
| return ret; |
| } |
| } |
| } |
| |
| return ret; |
| } |
| |
| int cmd_inject(int argc, const char **argv) |
| { |
| struct perf_inject inject = { |
| .tool = { |
| .sample = perf_event__repipe_sample, |
| .read = perf_event__repipe_sample, |
| .mmap = perf_event__repipe, |
| .mmap2 = perf_event__repipe, |
| .comm = perf_event__repipe, |
| .namespaces = perf_event__repipe, |
| .cgroup = 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, |
| .aux_output_hw_id = perf_event__repipe, |
| .context_switch = perf_event__repipe, |
| .throttle = perf_event__repipe, |
| .unthrottle = perf_event__repipe, |
| .ksymbol = perf_event__repipe, |
| .bpf = perf_event__repipe, |
| .text_poke = perf_event__repipe, |
| .attr = perf_event__repipe_attr, |
| .event_update = perf_event__repipe_event_update, |
| .tracing_data = 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, |
| .auxtrace_info = perf_event__repipe_op2_synth, |
| .auxtrace_error = perf_event__repipe_op2_synth, |
| .time_conv = perf_event__repipe_op2_synth, |
| .thread_map = perf_event__repipe_op2_synth, |
| .cpu_map = perf_event__repipe_op2_synth, |
| .stat_config = perf_event__repipe_op2_synth, |
| .stat = perf_event__repipe_op2_synth, |
| .stat_round = perf_event__repipe_op2_synth, |
| .feature = perf_event__repipe_op2_synth, |
| .finished_init = perf_event__repipe_op2_synth, |
| .compressed = perf_event__repipe_op4_synth, |
| .auxtrace = perf_event__repipe_auxtrace, |
| }, |
| .input_name = "-", |
| .samples = LIST_HEAD_INIT(inject.samples), |
| .output = { |
| .path = "-", |
| .mode = PERF_DATA_MODE_WRITE, |
| .use_stdio = true, |
| }, |
| }; |
| struct perf_data data = { |
| .mode = PERF_DATA_MODE_READ, |
| .use_stdio = true, |
| }; |
| int ret; |
| bool repipe = true; |
| const char *known_build_ids = NULL; |
| |
| struct option options[] = { |
| OPT_BOOLEAN('b', "build-ids", &inject.build_ids, |
| "Inject build-ids into the output stream"), |
| OPT_BOOLEAN(0, "buildid-all", &inject.build_id_all, |
| "Inject build-ids of all DSOs into the output stream"), |
| OPT_STRING(0, "known-build-ids", &known_build_ids, |
| "buildid path [,buildid path...]", |
| "build-ids to use for given paths"), |
| 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"), |
| #ifdef HAVE_JITDUMP |
| OPT_BOOLEAN('j', "jit", &inject.jit_mode, "merge jitdump files into perf.data file"), |
| #endif |
| OPT_INCR('v', "verbose", &verbose, |
| "be more verbose (show build ids, etc)"), |
| OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, |
| "file", "vmlinux pathname"), |
| OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux, |
| "don't load vmlinux even if found"), |
| OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, "file", |
| "kallsyms pathname"), |
| OPT_BOOLEAN('f', "force", &data.force, "don't complain, do it"), |
| OPT_CALLBACK_OPTARG(0, "itrace", &inject.itrace_synth_opts, |
| NULL, "opts", "Instruction Tracing options\n" |
| ITRACE_HELP, |
| itrace_parse_synth_opts), |
| OPT_BOOLEAN(0, "strip", &inject.strip, |
| "strip non-synthesized events (use with --itrace)"), |
| OPT_CALLBACK_OPTARG(0, "vm-time-correlation", &inject, NULL, "opts", |
| "correlate time between VM guests and the host", |
| parse_vm_time_correlation), |
| OPT_CALLBACK_OPTARG(0, "guest-data", &inject, NULL, "opts", |
| "inject events from a guest perf.data file", |
| parse_guest_data), |
| OPT_STRING(0, "guestmount", &symbol_conf.guestmount, "directory", |
| "guest mount directory under which every guest os" |
| " instance has a subdir"), |
| OPT_END() |
| }; |
| const char * const inject_usage[] = { |
| "perf inject [<options>]", |
| NULL |
| }; |
| #ifndef HAVE_JITDUMP |
| set_option_nobuild(options, 'j', "jit", "NO_LIBELF=1", true); |
| #endif |
| 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 (symbol__validate_sym_arguments()) |
| return -1; |
| |
| if (inject.in_place_update) { |
| if (!strcmp(inject.input_name, "-")) { |
| pr_err("Input file name required for in-place updating\n"); |
| return -1; |
| } |
| if (strcmp(inject.output.path, "-")) { |
| pr_err("Output file name must not be specified for in-place updating\n"); |
| return -1; |
| } |
| if (!data.force && !inject.in_place_update_dry_run) { |
| pr_err("The input file would be updated in place, " |
| "the --force option is required.\n"); |
| return -1; |
| } |
| if (!inject.in_place_update_dry_run) |
| data.in_place_update = true; |
| } else { |
| if (strcmp(inject.output.path, "-") && !inject.strip && |
| has_kcore_dir(inject.input_name)) { |
| inject.output.is_dir = true; |
| inject.copy_kcore_dir = true; |
| } |
| if (perf_data__open(&inject.output)) { |
| perror("failed to create output file"); |
| return -1; |
| } |
| } |
| |
| data.path = inject.input_name; |
| if (!strcmp(inject.input_name, "-") || inject.output.is_pipe) { |
| inject.is_pipe = true; |
| /* |
| * Do not repipe header when input is a regular file |
| * since either it can rewrite the header at the end |
| * or write a new pipe header. |
| */ |
| if (strcmp(inject.input_name, "-")) |
| repipe = false; |
| } |
| |
| inject.session = __perf_session__new(&data, repipe, |
| output_fd(&inject), |
| &inject.tool); |
| if (IS_ERR(inject.session)) { |
| ret = PTR_ERR(inject.session); |
| goto out_close_output; |
| } |
| |
| if (zstd_init(&(inject.session->zstd_data), 0) < 0) |
| pr_warning("Decompression initialization failed.\n"); |
| |
| /* Save original section info before feature bits change */ |
| ret = save_section_info(&inject); |
| if (ret) |
| goto out_delete; |
| |
| if (!data.is_pipe && inject.output.is_pipe) { |
| ret = perf_header__write_pipe(perf_data__fd(&inject.output)); |
| if (ret < 0) { |
| pr_err("Couldn't write a new pipe header.\n"); |
| goto out_delete; |
| } |
| |
| ret = perf_event__synthesize_for_pipe(&inject.tool, |
| inject.session, |
| &inject.output, |
| perf_event__repipe); |
| if (ret < 0) |
| goto out_delete; |
| } |
| |
| if (inject.build_ids && !inject.build_id_all) { |
| /* |
| * to make sure the mmap records are ordered correctly |
| * and so that the correct especially due to jitted code |
| * mmaps. We cannot generate the buildid hit list and |
| * inject the jit mmaps at the same time for now. |
| */ |
| inject.tool.ordered_events = true; |
| inject.tool.ordering_requires_timestamps = true; |
| if (known_build_ids != NULL) { |
| inject.known_build_ids = |
| perf_inject__parse_known_build_ids(known_build_ids); |
| |
| if (inject.known_build_ids == NULL) { |
| pr_err("Couldn't parse known build ids.\n"); |
| goto out_delete; |
| } |
| } |
| } |
| |
| if (inject.sched_stat) { |
| inject.tool.ordered_events = true; |
| } |
| |
| #ifdef HAVE_JITDUMP |
| if (inject.jit_mode) { |
| inject.tool.mmap2 = perf_event__jit_repipe_mmap2; |
| inject.tool.mmap = perf_event__jit_repipe_mmap; |
| inject.tool.ordered_events = true; |
| inject.tool.ordering_requires_timestamps = true; |
| /* |
| * JIT MMAP injection injects all MMAP events in one go, so it |
| * does not obey finished_round semantics. |
| */ |
| inject.tool.finished_round = perf_event__drop_oe; |
| } |
| #endif |
| ret = symbol__init(&inject.session->header.env); |
| if (ret < 0) |
| goto out_delete; |
| |
| ret = __cmd_inject(&inject); |
| |
| guest_session__exit(&inject.guest_session); |
| |
| out_delete: |
| strlist__delete(inject.known_build_ids); |
| zstd_fini(&(inject.session->zstd_data)); |
| perf_session__delete(inject.session); |
| out_close_output: |
| if (!inject.in_place_update) |
| perf_data__close(&inject.output); |
| free(inject.itrace_synth_opts.vm_tm_corr_args); |
| return ret; |
| } |