| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Adrian Hunter | 6997 | 59.70% | 44 | 23.28% |
| Namhyung Kim | 1042 | 8.89% | 19 | 10.05% |
| Andrey Vagin | 894 | 7.63% | 3 | 1.59% |
| Arnaldo Carvalho de Melo | 892 | 7.61% | 47 | 24.87% |
| Tom Zanussi | 485 | 4.14% | 4 | 2.12% |
| Raul Silvera | 453 | 3.86% | 2 | 1.06% |
| Stéphane Eranian | 274 | 2.34% | 4 | 2.12% |
| Ian Rogers | 190 | 1.62% | 10 | 5.29% |
| Jiri Olsa | 166 | 1.42% | 17 | 8.99% |
| Alexey Budankov | 43 | 0.37% | 1 | 0.53% |
| Ingo Molnar | 40 | 0.34% | 5 | 2.65% |
| James Clark | 37 | 0.32% | 1 | 0.53% |
| Frédéric Weisbecker | 35 | 0.30% | 2 | 1.06% |
| Riccardo Mancini | 27 | 0.23% | 2 | 1.06% |
| Hari Bathini | 22 | 0.19% | 1 | 0.53% |
| Taeung Song | 22 | 0.19% | 1 | 0.53% |
| Irina Tirdea | 17 | 0.15% | 2 | 1.06% |
| Peter Zijlstra | 15 | 0.13% | 2 | 1.06% |
| Yunlong Song | 13 | 0.11% | 1 | 0.53% |
| David Carrillo-Cisneros | 12 | 0.10% | 2 | 1.06% |
| Li Zefan | 9 | 0.08% | 2 | 1.06% |
| Yonatan Goldschmidt | 6 | 0.05% | 1 | 0.53% |
| Steve MacLean | 6 | 0.05% | 1 | 0.53% |
| Mamatha Inamdar | 6 | 0.05% | 1 | 0.53% |
| Arjan van de Ven | 2 | 0.02% | 1 | 0.53% |
| Ian Munsie | 2 | 0.02% | 2 | 1.06% |
| OGAWA Hirofumi | 2 | 0.02% | 1 | 0.53% |
| Wang Nan | 2 | 0.02% | 1 | 0.53% |
| Andi Kleen | 2 | 0.02% | 1 | 0.53% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 0.53% |
| Alexey Bayduraev | 1 | 0.01% | 1 | 0.53% |
| Ravi Bangoria | 1 | 0.01% | 1 | 0.53% |
| Josh Poimboeuf | 1 | 0.01% | 1 | 0.53% |
| Al Grant | 1 | 0.01% | 1 | 0.53% |
| Gustavo A. R. Silva | 1 | 0.01% | 1 | 0.53% |
| Colin Ian King | 1 | 0.01% | 1 | 0.53% |
| Chi Minghao | 1 | 0.01% | 1 | 0.53% |
| Total | 11721 | 189 |
// 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; }; 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; 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; if (inject->event_copy == NULL) { inject->event_copy = malloc(PERF_SAMPLE_MAX_SIZE); if (!inject->event_copy) return ERR_PTR(-ENOMEM); } 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); if (IS_ERR(event)) return PTR_ERR(event); } 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(thread)); 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); perf_event__repipe(tool, event, sample, machine); 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 = dso__filename_with_chroot(dso, 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; addr_location__init(&al); 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)) { struct dso *dso = map__dso(al.map); if (!dso->hit) { dso->hit = 1; dso__inject_build_id(dso, tool, machine, sample->cpumode, map__flags(al.map)); } } thread__put(thread); repipe: perf_event__repipe(tool, event, sample, machine); addr_location__exit(&al); 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); zfree(&gs->tmp_file_name); } zfree(&gs->vcpu); zfree(&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; struct perf_event_header *hdr; size_t hdr_sz = sizeof(*hdr); ssize_t ret; buf = gs->ev.event_buf; if (!buf) { buf = malloc(PERF_SAMPLE_MAX_SIZE); if (!buf) return -ENOMEM; gs->ev.event_buf = buf; } hdr = buf; 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 }; if (!inject.itrace_synth_opts.set) { /* Disable eager loading of kernel symbols that adds overhead to perf inject. */ symbol_conf.lazy_load_kernel_maps = true; } #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); free(inject.event_copy); free(inject.guest_session.ev.event_buf); return ret; }
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