#include #include #include "event.h" #include "debug.h" #include "hist.h" #include "machine.h" #include "sort.h" #include "string.h" #include "strlist.h" #include "thread.h" #include "thread_map.h" #include "symbol/kallsyms.h" #include "asm/bug.h" #include "stat.h" static const char *perf_event__names[] = { [0] = "TOTAL", [PERF_RECORD_MMAP] = "MMAP", [PERF_RECORD_MMAP2] = "MMAP2", [PERF_RECORD_LOST] = "LOST", [PERF_RECORD_COMM] = "COMM", [PERF_RECORD_EXIT] = "EXIT", [PERF_RECORD_THROTTLE] = "THROTTLE", [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE", [PERF_RECORD_FORK] = "FORK", [PERF_RECORD_READ] = "READ", [PERF_RECORD_SAMPLE] = "SAMPLE", [PERF_RECORD_AUX] = "AUX", [PERF_RECORD_ITRACE_START] = "ITRACE_START", [PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES", [PERF_RECORD_SWITCH] = "SWITCH", [PERF_RECORD_SWITCH_CPU_WIDE] = "SWITCH_CPU_WIDE", [PERF_RECORD_HEADER_ATTR] = "ATTR", [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE", [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA", [PERF_RECORD_HEADER_BUILD_ID] = "BUILD_ID", [PERF_RECORD_FINISHED_ROUND] = "FINISHED_ROUND", [PERF_RECORD_ID_INDEX] = "ID_INDEX", [PERF_RECORD_AUXTRACE_INFO] = "AUXTRACE_INFO", [PERF_RECORD_AUXTRACE] = "AUXTRACE", [PERF_RECORD_AUXTRACE_ERROR] = "AUXTRACE_ERROR", [PERF_RECORD_THREAD_MAP] = "THREAD_MAP", [PERF_RECORD_CPU_MAP] = "CPU_MAP", [PERF_RECORD_STAT_CONFIG] = "STAT_CONFIG", [PERF_RECORD_STAT] = "STAT", }; const char *perf_event__name(unsigned int id) { if (id >= ARRAY_SIZE(perf_event__names)) return "INVALID"; if (!perf_event__names[id]) return "UNKNOWN"; return perf_event__names[id]; } static struct perf_sample synth_sample = { .pid = -1, .tid = -1, .time = -1, .stream_id = -1, .cpu = -1, .period = 1, }; /* * Assumes that the first 4095 bytes of /proc/pid/stat contains * the comm, tgid and ppid. */ static int perf_event__get_comm_ids(pid_t pid, char *comm, size_t len, pid_t *tgid, pid_t *ppid) { char filename[PATH_MAX]; char bf[4096]; int fd; size_t size = 0; ssize_t n; char *nl, *name, *tgids, *ppids; *tgid = -1; *ppid = -1; snprintf(filename, sizeof(filename), "/proc/%d/status", pid); fd = open(filename, O_RDONLY); if (fd < 0) { pr_debug("couldn't open %s\n", filename); return -1; } n = read(fd, bf, sizeof(bf) - 1); close(fd); if (n <= 0) { pr_warning("Couldn't get COMM, tigd and ppid for pid %d\n", pid); return -1; } bf[n] = '\0'; name = strstr(bf, "Name:"); tgids = strstr(bf, "Tgid:"); ppids = strstr(bf, "PPid:"); if (name) { name += 5; /* strlen("Name:") */ while (*name && isspace(*name)) ++name; nl = strchr(name, '\n'); if (nl) *nl = '\0'; size = strlen(name); if (size >= len) size = len - 1; memcpy(comm, name, size); comm[size] = '\0'; } else { pr_debug("Name: string not found for pid %d\n", pid); } if (tgids) { tgids += 5; /* strlen("Tgid:") */ *tgid = atoi(tgids); } else { pr_debug("Tgid: string not found for pid %d\n", pid); } if (ppids) { ppids += 5; /* strlen("PPid:") */ *ppid = atoi(ppids); } else { pr_debug("PPid: string not found for pid %d\n", pid); } return 0; } static int perf_event__prepare_comm(union perf_event *event, pid_t pid, struct machine *machine, pid_t *tgid, pid_t *ppid) { size_t size; *ppid = -1; memset(&event->comm, 0, sizeof(event->comm)); if (machine__is_host(machine)) { if (perf_event__get_comm_ids(pid, event->comm.comm, sizeof(event->comm.comm), tgid, ppid) != 0) { return -1; } } else { *tgid = machine->pid; } if (*tgid < 0) return -1; event->comm.pid = *tgid; event->comm.header.type = PERF_RECORD_COMM; size = strlen(event->comm.comm) + 1; size = PERF_ALIGN(size, sizeof(u64)); memset(event->comm.comm + size, 0, machine->id_hdr_size); event->comm.header.size = (sizeof(event->comm) - (sizeof(event->comm.comm) - size) + machine->id_hdr_size); event->comm.tid = pid; return 0; } pid_t perf_event__synthesize_comm(struct perf_tool *tool, union perf_event *event, pid_t pid, perf_event__handler_t process, struct machine *machine) { pid_t tgid, ppid; if (perf_event__prepare_comm(event, pid, machine, &tgid, &ppid) != 0) return -1; if (process(tool, event, &synth_sample, machine) != 0) return -1; return tgid; } static int perf_event__synthesize_fork(struct perf_tool *tool, union perf_event *event, pid_t pid, pid_t tgid, pid_t ppid, perf_event__handler_t process, struct machine *machine) { memset(&event->fork, 0, sizeof(event->fork) + machine->id_hdr_size); /* * for main thread set parent to ppid from status file. For other * threads set parent pid to main thread. ie., assume main thread * spawns all threads in a process */ if (tgid == pid) { event->fork.ppid = ppid; event->fork.ptid = ppid; } else { event->fork.ppid = tgid; event->fork.ptid = tgid; } event->fork.pid = tgid; event->fork.tid = pid; event->fork.header.type = PERF_RECORD_FORK; event->fork.header.size = (sizeof(event->fork) + machine->id_hdr_size); if (process(tool, event, &synth_sample, machine) != 0) return -1; return 0; } int perf_event__synthesize_mmap_events(struct perf_tool *tool, union perf_event *event, pid_t pid, pid_t tgid, perf_event__handler_t process, struct machine *machine, bool mmap_data, unsigned int proc_map_timeout) { char filename[PATH_MAX]; FILE *fp; unsigned long long t; bool truncation = false; unsigned long long timeout = proc_map_timeout * 1000000ULL; int rc = 0; if (machine__is_default_guest(machine)) return 0; snprintf(filename, sizeof(filename), "%s/proc/%d/maps", machine->root_dir, pid); fp = fopen(filename, "r"); if (fp == NULL) { /* * We raced with a task exiting - just return: */ pr_debug("couldn't open %s\n", filename); return -1; } event->header.type = PERF_RECORD_MMAP2; t = rdclock(); while (1) { char bf[BUFSIZ]; char prot[5]; char execname[PATH_MAX]; char anonstr[] = "//anon"; unsigned int ino; size_t size; ssize_t n; if (fgets(bf, sizeof(bf), fp) == NULL) break; if ((rdclock() - t) > timeout) { pr_warning("Reading %s time out. " "You may want to increase " "the time limit by --proc-map-timeout\n", filename); truncation = true; goto out; } /* ensure null termination since stack will be reused. */ strcpy(execname, ""); /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n", &event->mmap2.start, &event->mmap2.len, prot, &event->mmap2.pgoff, &event->mmap2.maj, &event->mmap2.min, &ino, execname); /* * Anon maps don't have the execname. */ if (n < 7) continue; event->mmap2.ino = (u64)ino; /* * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c */ if (machine__is_host(machine)) event->header.misc = PERF_RECORD_MISC_USER; else event->header.misc = PERF_RECORD_MISC_GUEST_USER; /* map protection and flags bits */ event->mmap2.prot = 0; event->mmap2.flags = 0; if (prot[0] == 'r') event->mmap2.prot |= PROT_READ; if (prot[1] == 'w') event->mmap2.prot |= PROT_WRITE; if (prot[2] == 'x') event->mmap2.prot |= PROT_EXEC; if (prot[3] == 's') event->mmap2.flags |= MAP_SHARED; else event->mmap2.flags |= MAP_PRIVATE; if (prot[2] != 'x') { if (!mmap_data || prot[0] != 'r') continue; event->header.misc |= PERF_RECORD_MISC_MMAP_DATA; } out: if (truncation) event->header.misc |= PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT; if (!strcmp(execname, "")) strcpy(execname, anonstr); size = strlen(execname) + 1; memcpy(event->mmap2.filename, execname, size); size = PERF_ALIGN(size, sizeof(u64)); event->mmap2.len -= event->mmap.start; event->mmap2.header.size = (sizeof(event->mmap2) - (sizeof(event->mmap2.filename) - size)); memset(event->mmap2.filename + size, 0, machine->id_hdr_size); event->mmap2.header.size += machine->id_hdr_size; event->mmap2.pid = tgid; event->mmap2.tid = pid; if (process(tool, event, &synth_sample, machine) != 0) { rc = -1; break; } if (truncation) break; } fclose(fp); return rc; } int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine) { int rc = 0; struct map *pos; struct map_groups *kmaps = &machine->kmaps; struct maps *maps = &kmaps->maps[MAP__FUNCTION]; union perf_event *event = zalloc((sizeof(event->mmap) + machine->id_hdr_size)); if (event == NULL) { pr_debug("Not enough memory synthesizing mmap event " "for kernel modules\n"); return -1; } event->header.type = PERF_RECORD_MMAP; /* * kernel uses 0 for user space maps, see kernel/perf_event.c * __perf_event_mmap */ if (machine__is_host(machine)) event->header.misc = PERF_RECORD_MISC_KERNEL; else event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; for (pos = maps__first(maps); pos; pos = map__next(pos)) { size_t size; if (__map__is_kernel(pos)) continue; size = PERF_ALIGN(pos->dso->long_name_len + 1, sizeof(u64)); event->mmap.header.type = PERF_RECORD_MMAP; event->mmap.header.size = (sizeof(event->mmap) - (sizeof(event->mmap.filename) - size)); memset(event->mmap.filename + size, 0, machine->id_hdr_size); event->mmap.header.size += machine->id_hdr_size; event->mmap.start = pos->start; event->mmap.len = pos->end - pos->start; event->mmap.pid = machine->pid; memcpy(event->mmap.filename, pos->dso->long_name, pos->dso->long_name_len + 1); if (process(tool, event, &synth_sample, machine) != 0) { rc = -1; break; } } free(event); return rc; } static int __event__synthesize_thread(union perf_event *comm_event, union perf_event *mmap_event, union perf_event *fork_event, pid_t pid, int full, perf_event__handler_t process, struct perf_tool *tool, struct machine *machine, bool mmap_data, unsigned int proc_map_timeout) { char filename[PATH_MAX]; DIR *tasks; struct dirent dirent, *next; pid_t tgid, ppid; int rc = 0; /* special case: only send one comm event using passed in pid */ if (!full) { tgid = perf_event__synthesize_comm(tool, comm_event, pid, process, machine); if (tgid == -1) return -1; return perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, process, machine, mmap_data, proc_map_timeout); } if (machine__is_default_guest(machine)) return 0; snprintf(filename, sizeof(filename), "%s/proc/%d/task", machine->root_dir, pid); tasks = opendir(filename); if (tasks == NULL) { pr_debug("couldn't open %s\n", filename); return 0; } while (!readdir_r(tasks, &dirent, &next) && next) { char *end; pid_t _pid; _pid = strtol(dirent.d_name, &end, 10); if (*end) continue; rc = -1; if (perf_event__prepare_comm(comm_event, _pid, machine, &tgid, &ppid) != 0) break; if (perf_event__synthesize_fork(tool, fork_event, _pid, tgid, ppid, process, machine) < 0) break; /* * Send the prepared comm event */ if (process(tool, comm_event, &synth_sample, machine) != 0) break; rc = 0; if (_pid == pid) { /* process the parent's maps too */ rc = perf_event__synthesize_mmap_events(tool, mmap_event, pid, tgid, process, machine, mmap_data, proc_map_timeout); if (rc) break; } } closedir(tasks); return rc; } int perf_event__synthesize_thread_map(struct perf_tool *tool, struct thread_map *threads, perf_event__handler_t process, struct machine *machine, bool mmap_data, unsigned int proc_map_timeout) { union perf_event *comm_event, *mmap_event, *fork_event; int err = -1, thread, j; comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); if (comm_event == NULL) goto out; mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size); if (mmap_event == NULL) goto out_free_comm; fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); if (fork_event == NULL) goto out_free_mmap; err = 0; for (thread = 0; thread < threads->nr; ++thread) { if (__event__synthesize_thread(comm_event, mmap_event, fork_event, thread_map__pid(threads, thread), 0, process, tool, machine, mmap_data, proc_map_timeout)) { err = -1; break; } /* * comm.pid is set to thread group id by * perf_event__synthesize_comm */ if ((int) comm_event->comm.pid != thread_map__pid(threads, thread)) { bool need_leader = true; /* is thread group leader in thread_map? */ for (j = 0; j < threads->nr; ++j) { if ((int) comm_event->comm.pid == thread_map__pid(threads, j)) { need_leader = false; break; } } /* if not, generate events for it */ if (need_leader && __event__synthesize_thread(comm_event, mmap_event, fork_event, comm_event->comm.pid, 0, process, tool, machine, mmap_data, proc_map_timeout)) { err = -1; break; } } } free(fork_event); out_free_mmap: free(mmap_event); out_free_comm: free(comm_event); out: return err; } int perf_event__synthesize_threads(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine, bool mmap_data, unsigned int proc_map_timeout) { DIR *proc; char proc_path[PATH_MAX]; struct dirent dirent, *next; union perf_event *comm_event, *mmap_event, *fork_event; int err = -1; if (machine__is_default_guest(machine)) return 0; comm_event = malloc(sizeof(comm_event->comm) + machine->id_hdr_size); if (comm_event == NULL) goto out; mmap_event = malloc(sizeof(mmap_event->mmap) + machine->id_hdr_size); if (mmap_event == NULL) goto out_free_comm; fork_event = malloc(sizeof(fork_event->fork) + machine->id_hdr_size); if (fork_event == NULL) goto out_free_mmap; snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir); proc = opendir(proc_path); if (proc == NULL) goto out_free_fork; while (!readdir_r(proc, &dirent, &next) && next) { char *end; pid_t pid = strtol(dirent.d_name, &end, 10); if (*end) /* only interested in proper numerical dirents */ continue; /* * We may race with exiting thread, so don't stop just because * one thread couldn't be synthesized. */ __event__synthesize_thread(comm_event, mmap_event, fork_event, pid, 1, process, tool, machine, mmap_data, proc_map_timeout); } err = 0; closedir(proc); out_free_fork: free(fork_event); out_free_mmap: free(mmap_event); out_free_comm: free(comm_event); out: return err; } struct process_symbol_args { const char *name; u64 start; }; static int find_symbol_cb(void *arg, const char *name, char type, u64 start) { struct process_symbol_args *args = arg; /* * Must be a function or at least an alias, as in PARISC64, where "_text" is * an 'A' to the same address as "_stext". */ if (!(symbol_type__is_a(type, MAP__FUNCTION) || type == 'A') || strcmp(name, args->name)) return 0; args->start = start; return 1; } u64 kallsyms__get_function_start(const char *kallsyms_filename, const char *symbol_name) { struct process_symbol_args args = { .name = symbol_name, }; if (kallsyms__parse(kallsyms_filename, &args, find_symbol_cb) <= 0) return 0; return args.start; } int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine) { size_t size; const char *mmap_name; char name_buff[PATH_MAX]; struct map *map = machine__kernel_map(machine); struct kmap *kmap; int err; union perf_event *event; if (map == NULL) return -1; /* * We should get this from /sys/kernel/sections/.text, but till that is * available use this, and after it is use this as a fallback for older * kernels. */ event = zalloc((sizeof(event->mmap) + machine->id_hdr_size)); if (event == NULL) { pr_debug("Not enough memory synthesizing mmap event " "for kernel modules\n"); return -1; } mmap_name = machine__mmap_name(machine, name_buff, sizeof(name_buff)); if (machine__is_host(machine)) { /* * kernel uses PERF_RECORD_MISC_USER for user space maps, * see kernel/perf_event.c __perf_event_mmap */ event->header.misc = PERF_RECORD_MISC_KERNEL; } else { event->header.misc = PERF_RECORD_MISC_GUEST_KERNEL; } kmap = map__kmap(map); size = snprintf(event->mmap.filename, sizeof(event->mmap.filename), "%s%s", mmap_name, kmap->ref_reloc_sym->name) + 1; size = PERF_ALIGN(size, sizeof(u64)); event->mmap.header.type = PERF_RECORD_MMAP; event->mmap.header.size = (sizeof(event->mmap) - (sizeof(event->mmap.filename) - size) + machine->id_hdr_size); event->mmap.pgoff = kmap->ref_reloc_sym->addr; event->mmap.start = map->start; event->mmap.len = map->end - event->mmap.start; event->mmap.pid = machine->pid; err = process(tool, event, &synth_sample, machine); free(event); return err; } int perf_event__synthesize_thread_map2(struct perf_tool *tool, struct thread_map *threads, perf_event__handler_t process, struct machine *machine) { union perf_event *event; int i, err, size; size = sizeof(event->thread_map); size += threads->nr * sizeof(event->thread_map.entries[0]); event = zalloc(size); if (!event) return -ENOMEM; event->header.type = PERF_RECORD_THREAD_MAP; event->header.size = size; event->thread_map.nr = threads->nr; for (i = 0; i < threads->nr; i++) { struct thread_map_event_entry *entry = &event->thread_map.entries[i]; char *comm = thread_map__comm(threads, i); if (!comm) comm = (char *) ""; entry->pid = thread_map__pid(threads, i); strncpy((char *) &entry->comm, comm, sizeof(entry->comm)); } err = process(tool, event, NULL, machine); free(event); return err; } static void synthesize_cpus(struct cpu_map_entries *cpus, struct cpu_map *map) { int i; cpus->nr = map->nr; for (i = 0; i < map->nr; i++) cpus->cpu[i] = map->map[i]; } static void synthesize_mask(struct cpu_map_mask *mask, struct cpu_map *map, int max) { int i; mask->nr = BITS_TO_LONGS(max); mask->long_size = sizeof(long); for (i = 0; i < map->nr; i++) set_bit(map->map[i], mask->mask); } static size_t cpus_size(struct cpu_map *map) { return sizeof(struct cpu_map_entries) + map->nr * sizeof(u16); } static size_t mask_size(struct cpu_map *map, int *max) { int i; *max = 0; for (i = 0; i < map->nr; i++) { /* bit possition of the cpu is + 1 */ int bit = map->map[i] + 1; if (bit > *max) *max = bit; } return sizeof(struct cpu_map_mask) + BITS_TO_LONGS(*max) * sizeof(long); } void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max) { size_t size_cpus, size_mask; bool is_dummy = cpu_map__empty(map); /* * Both array and mask data have variable size based * on the number of cpus and their actual values. * The size of the 'struct cpu_map_data' is: * * array = size of 'struct cpu_map_entries' + * number of cpus * sizeof(u64) * * mask = size of 'struct cpu_map_mask' + * maximum cpu bit converted to size of longs * * and finaly + the size of 'struct cpu_map_data'. */ size_cpus = cpus_size(map); size_mask = mask_size(map, max); if (is_dummy || (size_cpus < size_mask)) { *size += size_cpus; *type = PERF_CPU_MAP__CPUS; } else { *size += size_mask; *type = PERF_CPU_MAP__MASK; } *size += sizeof(struct cpu_map_data); return zalloc(*size); } void cpu_map_data__synthesize(struct cpu_map_data *data, struct cpu_map *map, u16 type, int max) { data->type = type; switch (type) { case PERF_CPU_MAP__CPUS: synthesize_cpus((struct cpu_map_entries *) data->data, map); break; case PERF_CPU_MAP__MASK: synthesize_mask((struct cpu_map_mask *) data->data, map, max); default: break; }; } static struct cpu_map_event* cpu_map_event__new(struct cpu_map *map) { size_t size = sizeof(struct cpu_map_event); struct cpu_map_event *event; int max; u16 type; event = cpu_map_data__alloc(map, &size, &type, &max); if (!event) return NULL; event->header.type = PERF_RECORD_CPU_MAP; event->header.size = size; event->data.type = type; cpu_map_data__synthesize(&event->data, map, type, max); return event; } int perf_event__synthesize_cpu_map(struct perf_tool *tool, struct cpu_map *map, perf_event__handler_t process, struct machine *machine) { struct cpu_map_event *event; int err; event = cpu_map_event__new(map); if (!event) return -ENOMEM; err = process(tool, (union perf_event *) event, NULL, machine); free(event); return err; } int perf_event__synthesize_stat_config(struct perf_tool *tool, struct perf_stat_config *config, perf_event__handler_t process, struct machine *machine) { struct stat_config_event *event; int size, i = 0, err; size = sizeof(*event); size += (PERF_STAT_CONFIG_TERM__MAX * sizeof(event->data[0])); event = zalloc(size); if (!event) return -ENOMEM; event->header.type = PERF_RECORD_STAT_CONFIG; event->header.size = size; event->nr = PERF_STAT_CONFIG_TERM__MAX; #define ADD(__term, __val) \ event->data[i].tag = PERF_STAT_CONFIG_TERM__##__term; \ event->data[i].val = __val; \ i++; ADD(AGGR_MODE, config->aggr_mode) ADD(INTERVAL, config->interval) ADD(SCALE, config->scale) WARN_ONCE(i != PERF_STAT_CONFIG_TERM__MAX, "stat config terms unbalanced\n"); #undef ADD err = process(tool, (union perf_event *) event, NULL, machine); free(event); return err; } void perf_event__read_stat_config(struct perf_stat_config *config, struct stat_config_event *event) { unsigned i; for (i = 0; i < event->nr; i++) { switch (event->data[i].tag) { #define CASE(__term, __val) \ case PERF_STAT_CONFIG_TERM__##__term: \ config->__val = event->data[i].val; \ break; CASE(AGGR_MODE, aggr_mode) CASE(SCALE, scale) CASE(INTERVAL, interval) #undef CASE default: pr_warning("unknown stat config term %" PRIu64 "\n", event->data[i].tag); } } } size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp) { const char *s; if (event->header.misc & PERF_RECORD_MISC_COMM_EXEC) s = " exec"; else s = ""; return fprintf(fp, "%s: %s:%d/%d\n", s, event->comm.comm, event->comm.pid, event->comm.tid); } int perf_event__process_comm(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample, struct machine *machine) { return machine__process_comm_event(machine, event, sample); } int perf_event__process_lost(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample, struct machine *machine) { return machine__process_lost_event(machine, event, sample); } int perf_event__process_aux(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample __maybe_unused, struct machine *machine) { return machine__process_aux_event(machine, event); } int perf_event__process_itrace_start(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample __maybe_unused, struct machine *machine) { return machine__process_itrace_start_event(machine, event); } int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample, struct machine *machine) { return machine__process_lost_samples_event(machine, event, sample); } int perf_event__process_switch(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample __maybe_unused, struct machine *machine) { return machine__process_switch_event(machine, event); } size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp) { return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n", event->mmap.pid, event->mmap.tid, event->mmap.start, event->mmap.len, event->mmap.pgoff, (event->header.misc & PERF_RECORD_MISC_MMAP_DATA) ? 'r' : 'x', event->mmap.filename); } size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp) { return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 " %02x:%02x %"PRIu64" %"PRIu64"]: %c%c%c%c %s\n", event->mmap2.pid, event->mmap2.tid, event->mmap2.start, event->mmap2.len, event->mmap2.pgoff, event->mmap2.maj, event->mmap2.min, event->mmap2.ino, event->mmap2.ino_generation, (event->mmap2.prot & PROT_READ) ? 'r' : '-', (event->mmap2.prot & PROT_WRITE) ? 'w' : '-', (event->mmap2.prot & PROT_EXEC) ? 'x' : '-', (event->mmap2.flags & MAP_SHARED) ? 's' : 'p', event->mmap2.filename); } size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp) { struct thread_map *threads = thread_map__new_event(&event->thread_map); size_t ret; ret = fprintf(fp, " nr: "); if (threads) ret += thread_map__fprintf(threads, fp); else ret += fprintf(fp, "failed to get threads from event\n"); thread_map__put(threads); return ret; } size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp) { struct cpu_map *cpus = cpu_map__new_data(&event->cpu_map.data); size_t ret; ret = fprintf(fp, " nr: "); if (cpus) ret += cpu_map__fprintf(cpus, fp); else ret += fprintf(fp, "failed to get cpumap from event\n"); cpu_map__put(cpus); return ret; } int perf_event__process_mmap(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample, struct machine *machine) { return machine__process_mmap_event(machine, event, sample); } int perf_event__process_mmap2(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample, struct machine *machine) { return machine__process_mmap2_event(machine, event, sample); } size_t perf_event__fprintf_task(union perf_event *event, FILE *fp) { return fprintf(fp, "(%d:%d):(%d:%d)\n", event->fork.pid, event->fork.tid, event->fork.ppid, event->fork.ptid); } int perf_event__process_fork(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample, struct machine *machine) { return machine__process_fork_event(machine, event, sample); } int perf_event__process_exit(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample, struct machine *machine) { return machine__process_exit_event(machine, event, sample); } size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp) { return fprintf(fp, " offset: %#"PRIx64" size: %#"PRIx64" flags: %#"PRIx64" [%s%s]\n", event->aux.aux_offset, event->aux.aux_size, event->aux.flags, event->aux.flags & PERF_AUX_FLAG_TRUNCATED ? "T" : "", event->aux.flags & PERF_AUX_FLAG_OVERWRITE ? "O" : ""); } size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp) { return fprintf(fp, " pid: %u tid: %u\n", event->itrace_start.pid, event->itrace_start.tid); } size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp) { bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; const char *in_out = out ? "OUT" : "IN "; if (event->header.type == PERF_RECORD_SWITCH) return fprintf(fp, " %s\n", in_out); return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n", in_out, out ? "next" : "prev", event->context_switch.next_prev_pid, event->context_switch.next_prev_tid); } size_t perf_event__fprintf(union perf_event *event, FILE *fp) { size_t ret = fprintf(fp, "PERF_RECORD_%s", perf_event__name(event->header.type)); switch (event->header.type) { case PERF_RECORD_COMM: ret += perf_event__fprintf_comm(event, fp); break; case PERF_RECORD_FORK: case PERF_RECORD_EXIT: ret += perf_event__fprintf_task(event, fp); break; case PERF_RECORD_MMAP: ret += perf_event__fprintf_mmap(event, fp); break; case PERF_RECORD_MMAP2: ret += perf_event__fprintf_mmap2(event, fp); break; case PERF_RECORD_AUX: ret += perf_event__fprintf_aux(event, fp); break; case PERF_RECORD_ITRACE_START: ret += perf_event__fprintf_itrace_start(event, fp); break; case PERF_RECORD_SWITCH: case PERF_RECORD_SWITCH_CPU_WIDE: ret += perf_event__fprintf_switch(event, fp); break; default: ret += fprintf(fp, "\n"); } return ret; } int perf_event__process(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_sample *sample, struct machine *machine) { return machine__process_event(machine, event, sample); } void thread__find_addr_map(struct thread *thread, u8 cpumode, enum map_type type, u64 addr, struct addr_location *al) { struct map_groups *mg = thread->mg; struct machine *machine = mg->machine; bool load_map = false; al->machine = machine; al->thread = thread; al->addr = addr; al->cpumode = cpumode; al->filtered = 0; if (machine == NULL) { al->map = NULL; return; } if (cpumode == PERF_RECORD_MISC_KERNEL && perf_host) { al->level = 'k'; mg = &machine->kmaps; load_map = true; } else if (cpumode == PERF_RECORD_MISC_USER && perf_host) { al->level = '.'; } else if (cpumode == PERF_RECORD_MISC_GUEST_KERNEL && perf_guest) { al->level = 'g'; mg = &machine->kmaps; load_map = true; } else if (cpumode == PERF_RECORD_MISC_GUEST_USER && perf_guest) { al->level = 'u'; } else { al->level = 'H'; al->map = NULL; if ((cpumode == PERF_RECORD_MISC_GUEST_USER || cpumode == PERF_RECORD_MISC_GUEST_KERNEL) && !perf_guest) al->filtered |= (1 << HIST_FILTER__GUEST); if ((cpumode == PERF_RECORD_MISC_USER || cpumode == PERF_RECORD_MISC_KERNEL) && !perf_host) al->filtered |= (1 << HIST_FILTER__HOST); return; } try_again: al->map = map_groups__find(mg, type, al->addr); if (al->map == NULL) { /* * If this is outside of all known maps, and is a negative * address, try to look it up in the kernel dso, as it might be * a vsyscall or vdso (which executes in user-mode). * * XXX This is nasty, we should have a symbol list in the * "[vdso]" dso, but for now lets use the old trick of looking * in the whole kernel symbol list. */ if (cpumode == PERF_RECORD_MISC_USER && machine && mg != &machine->kmaps && machine__kernel_ip(machine, al->addr)) { mg = &machine->kmaps; load_map = true; goto try_again; } } else { /* * Kernel maps might be changed when loading symbols so loading * must be done prior to using kernel maps. */ if (load_map) map__load(al->map, machine->symbol_filter); al->addr = al->map->map_ip(al->map, al->addr); } } void thread__find_addr_location(struct thread *thread, u8 cpumode, enum map_type type, u64 addr, struct addr_location *al) { thread__find_addr_map(thread, cpumode, type, addr, al); if (al->map != NULL) al->sym = map__find_symbol(al->map, al->addr, thread->mg->machine->symbol_filter); else al->sym = NULL; } /* * Callers need to drop the reference to al->thread, obtained in * machine__findnew_thread() */ int perf_event__preprocess_sample(const union perf_event *event, struct machine *machine, struct addr_location *al, struct perf_sample *sample) { u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; struct thread *thread = machine__findnew_thread(machine, sample->pid, sample->tid); if (thread == NULL) return -1; dump_printf(" ... thread: %s:%d\n", thread__comm_str(thread), thread->tid); /* * Have we already created the kernel maps for this machine? * * This should have happened earlier, when we processed the kernel MMAP * events, but for older perf.data files there was no such thing, so do * it now. */ if (cpumode == PERF_RECORD_MISC_KERNEL && machine__kernel_map(machine) == NULL) machine__create_kernel_maps(machine); thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->ip, al); dump_printf(" ...... dso: %s\n", al->map ? al->map->dso->long_name : al->level == 'H' ? "[hypervisor]" : ""); if (thread__is_filtered(thread)) al->filtered |= (1 << HIST_FILTER__THREAD); al->sym = NULL; al->cpu = sample->cpu; al->socket = -1; if (al->cpu >= 0) { struct perf_env *env = machine->env; if (env && env->cpu) al->socket = env->cpu[al->cpu].socket_id; } if (al->map) { struct dso *dso = al->map->dso; if (symbol_conf.dso_list && (!dso || !(strlist__has_entry(symbol_conf.dso_list, dso->short_name) || (dso->short_name != dso->long_name && strlist__has_entry(symbol_conf.dso_list, dso->long_name))))) { al->filtered |= (1 << HIST_FILTER__DSO); } al->sym = map__find_symbol(al->map, al->addr, machine->symbol_filter); } if (symbol_conf.sym_list && (!al->sym || !strlist__has_entry(symbol_conf.sym_list, al->sym->name))) { al->filtered |= (1 << HIST_FILTER__SYMBOL); } return 0; } /* * The preprocess_sample method will return with reference counts for the * in it, when done using (and perhaps getting ref counts if needing to * keep a pointer to one of those entries) it must be paired with * addr_location__put(), so that the refcounts can be decremented. */ void addr_location__put(struct addr_location *al) { thread__zput(al->thread); } bool is_bts_event(struct perf_event_attr *attr) { return attr->type == PERF_TYPE_HARDWARE && (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) && attr->sample_period == 1; } bool sample_addr_correlates_sym(struct perf_event_attr *attr) { if (attr->type == PERF_TYPE_SOFTWARE && (attr->config == PERF_COUNT_SW_PAGE_FAULTS || attr->config == PERF_COUNT_SW_PAGE_FAULTS_MIN || attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)) return true; if (is_bts_event(attr)) return true; return false; } void perf_event__preprocess_sample_addr(union perf_event *event, struct perf_sample *sample, struct thread *thread, struct addr_location *al) { u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; thread__find_addr_map(thread, cpumode, MAP__FUNCTION, sample->addr, al); if (!al->map) thread__find_addr_map(thread, cpumode, MAP__VARIABLE, sample->addr, al); al->cpu = sample->cpu; al->sym = NULL; if (al->map) al->sym = map__find_symbol(al->map, al->addr, NULL); }