| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jiri Olsa | 4362 | 23.24% | 36 | 16.36% |
| Robert Richter | 4136 | 22.03% | 10 | 4.55% |
| David Carrillo-Cisneros | 1964 | 10.46% | 15 | 6.82% |
| Namhyung Kim | 1931 | 10.29% | 20 | 9.09% |
| Stéphane Eranian | 1773 | 9.44% | 9 | 4.09% |
| Arnaldo Carvalho de Melo | 1253 | 6.67% | 63 | 28.64% |
| Tom Zanussi | 863 | 4.60% | 5 | 2.27% |
| Kan Liang | 505 | 2.69% | 4 | 1.82% |
| Peter Zijlstra | 346 | 1.84% | 4 | 1.82% |
| Jin Yao | 277 | 1.48% | 1 | 0.45% |
| Andi Kleen | 230 | 1.23% | 1 | 0.45% |
| Alexey Budankov | 220 | 1.17% | 2 | 0.91% |
| Adrian Hunter | 165 | 0.88% | 4 | 1.82% |
| Yanmin Zhang | 131 | 0.70% | 1 | 0.45% |
| Frédéric Weisbecker | 113 | 0.60% | 7 | 3.18% |
| David Ahern | 101 | 0.54% | 4 | 1.82% |
| Wang Nan | 94 | 0.50% | 3 | 1.36% |
| Jan Stancek | 66 | 0.35% | 2 | 0.91% |
| Masami Hiramatsu | 63 | 0.34% | 3 | 1.36% |
| Thomas Richter | 40 | 0.21% | 2 | 0.91% |
| Feng Tang | 38 | 0.20% | 1 | 0.45% |
| Irina Tirdea | 24 | 0.13% | 2 | 0.91% |
| Arjan van de Ven | 15 | 0.08% | 1 | 0.45% |
| Chris Samuel | 10 | 0.05% | 1 | 0.45% |
| Xiao Guangrong | 8 | 0.04% | 1 | 0.45% |
| Thomas Jarosch | 8 | 0.04% | 1 | 0.45% |
| Soramichi Akiyama | 7 | 0.04% | 1 | 0.45% |
| Rui Teng | 5 | 0.03% | 1 | 0.45% |
| Paul Gortmaker | 4 | 0.02% | 1 | 0.45% |
| Tommi Rantala | 4 | 0.02% | 2 | 0.91% |
| Tzvetomir Stoyanov (VMware) | 3 | 0.02% | 2 | 0.91% |
| OGAWA Hirofumi | 2 | 0.01% | 1 | 0.45% |
| Lin Ming | 2 | 0.01% | 1 | 0.45% |
| Franck Bui-Huu | 2 | 0.01% | 1 | 0.45% |
| Ingo Molnar | 2 | 0.01% | 2 | 0.91% |
| Alan Cox | 1 | 0.01% | 1 | 0.45% |
| Tzvetomir Stoyanov | 1 | 0.01% | 1 | 0.45% |
| Jiada Wang | 1 | 0.01% | 1 | 0.45% |
| Ravi Bangoria | 1 | 0.01% | 1 | 0.45% |
| Greg Kroah-Hartman | 1 | 0.01% | 1 | 0.45% |
| Total | 18772 | 220 |
// SPDX-License-Identifier: GPL-2.0 #include <errno.h> #include <inttypes.h> #include "util.h" #include "string2.h" #include <sys/param.h> #include <sys/types.h> #include <byteswap.h> #include <unistd.h> #include <stdio.h> #include <stdlib.h> #include <linux/compiler.h> #include <linux/list.h> #include <linux/kernel.h> #include <linux/bitops.h> #include <linux/stringify.h> #include <sys/stat.h> #include <sys/utsname.h> #include <linux/time64.h> #include <dirent.h> #include "evlist.h" #include "evsel.h" #include "header.h" #include "memswap.h" #include "../perf.h" #include "trace-event.h" #include "session.h" #include "symbol.h" #include "debug.h" #include "cpumap.h" #include "pmu.h" #include "vdso.h" #include "strbuf.h" #include "build-id.h" #include "data.h" #include <api/fs/fs.h> #include "asm/bug.h" #include "tool.h" #include "time-utils.h" #include "units.h" #include "sane_ctype.h" /* * magic2 = "PERFILE2" * must be a numerical value to let the endianness * determine the memory layout. That way we are able * to detect endianness when reading the perf.data file * back. * * we check for legacy (PERFFILE) format. */ static const char *__perf_magic1 = "PERFFILE"; static const u64 __perf_magic2 = 0x32454c4946524550ULL; static const u64 __perf_magic2_sw = 0x50455246494c4532ULL; #define PERF_MAGIC __perf_magic2 const char perf_version_string[] = PERF_VERSION; struct perf_file_attr { struct perf_event_attr attr; struct perf_file_section ids; }; struct feat_fd { struct perf_header *ph; int fd; void *buf; /* Either buf != NULL or fd >= 0 */ ssize_t offset; size_t size; struct perf_evsel *events; }; void perf_header__set_feat(struct perf_header *header, int feat) { set_bit(feat, header->adds_features); } void perf_header__clear_feat(struct perf_header *header, int feat) { clear_bit(feat, header->adds_features); } bool perf_header__has_feat(const struct perf_header *header, int feat) { return test_bit(feat, header->adds_features); } static int __do_write_fd(struct feat_fd *ff, const void *buf, size_t size) { ssize_t ret = writen(ff->fd, buf, size); if (ret != (ssize_t)size) return ret < 0 ? (int)ret : -1; return 0; } static int __do_write_buf(struct feat_fd *ff, const void *buf, size_t size) { /* struct perf_event_header::size is u16 */ const size_t max_size = 0xffff - sizeof(struct perf_event_header); size_t new_size = ff->size; void *addr; if (size + ff->offset > max_size) return -E2BIG; while (size > (new_size - ff->offset)) new_size <<= 1; new_size = min(max_size, new_size); if (ff->size < new_size) { addr = realloc(ff->buf, new_size); if (!addr) return -ENOMEM; ff->buf = addr; ff->size = new_size; } memcpy(ff->buf + ff->offset, buf, size); ff->offset += size; return 0; } /* Return: 0 if succeded, -ERR if failed. */ int do_write(struct feat_fd *ff, const void *buf, size_t size) { if (!ff->buf) return __do_write_fd(ff, buf, size); return __do_write_buf(ff, buf, size); } /* Return: 0 if succeded, -ERR if failed. */ static int do_write_bitmap(struct feat_fd *ff, unsigned long *set, u64 size) { u64 *p = (u64 *) set; int i, ret; ret = do_write(ff, &size, sizeof(size)); if (ret < 0) return ret; for (i = 0; (u64) i < BITS_TO_U64(size); i++) { ret = do_write(ff, p + i, sizeof(*p)); if (ret < 0) return ret; } return 0; } /* Return: 0 if succeded, -ERR if failed. */ int write_padded(struct feat_fd *ff, const void *bf, size_t count, size_t count_aligned) { static const char zero_buf[NAME_ALIGN]; int err = do_write(ff, bf, count); if (!err) err = do_write(ff, zero_buf, count_aligned - count); return err; } #define string_size(str) \ (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32)) /* Return: 0 if succeded, -ERR if failed. */ static int do_write_string(struct feat_fd *ff, const char *str) { u32 len, olen; int ret; olen = strlen(str) + 1; len = PERF_ALIGN(olen, NAME_ALIGN); /* write len, incl. \0 */ ret = do_write(ff, &len, sizeof(len)); if (ret < 0) return ret; return write_padded(ff, str, olen, len); } static int __do_read_fd(struct feat_fd *ff, void *addr, ssize_t size) { ssize_t ret = readn(ff->fd, addr, size); if (ret != size) return ret < 0 ? (int)ret : -1; return 0; } static int __do_read_buf(struct feat_fd *ff, void *addr, ssize_t size) { if (size > (ssize_t)ff->size - ff->offset) return -1; memcpy(addr, ff->buf + ff->offset, size); ff->offset += size; return 0; } static int __do_read(struct feat_fd *ff, void *addr, ssize_t size) { if (!ff->buf) return __do_read_fd(ff, addr, size); return __do_read_buf(ff, addr, size); } static int do_read_u32(struct feat_fd *ff, u32 *addr) { int ret; ret = __do_read(ff, addr, sizeof(*addr)); if (ret) return ret; if (ff->ph->needs_swap) *addr = bswap_32(*addr); return 0; } static int do_read_u64(struct feat_fd *ff, u64 *addr) { int ret; ret = __do_read(ff, addr, sizeof(*addr)); if (ret) return ret; if (ff->ph->needs_swap) *addr = bswap_64(*addr); return 0; } static char *do_read_string(struct feat_fd *ff) { u32 len; char *buf; if (do_read_u32(ff, &len)) return NULL; buf = malloc(len); if (!buf) return NULL; if (!__do_read(ff, buf, len)) { /* * strings are padded by zeroes * thus the actual strlen of buf * may be less than len */ return buf; } free(buf); return NULL; } /* Return: 0 if succeded, -ERR if failed. */ static int do_read_bitmap(struct feat_fd *ff, unsigned long **pset, u64 *psize) { unsigned long *set; u64 size, *p; int i, ret; ret = do_read_u64(ff, &size); if (ret) return ret; set = bitmap_alloc(size); if (!set) return -ENOMEM; p = (u64 *) set; for (i = 0; (u64) i < BITS_TO_U64(size); i++) { ret = do_read_u64(ff, p + i); if (ret < 0) { free(set); return ret; } } *pset = set; *psize = size; return 0; } static int write_tracing_data(struct feat_fd *ff, struct perf_evlist *evlist) { if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__)) return -1; return read_tracing_data(ff->fd, &evlist->entries); } static int write_build_id(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { struct perf_session *session; int err; session = container_of(ff->ph, struct perf_session, header); if (!perf_session__read_build_ids(session, true)) return -1; if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__)) return -1; err = perf_session__write_buildid_table(session, ff); if (err < 0) { pr_debug("failed to write buildid table\n"); return err; } perf_session__cache_build_ids(session); return 0; } static int write_hostname(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { struct utsname uts; int ret; ret = uname(&uts); if (ret < 0) return -1; return do_write_string(ff, uts.nodename); } static int write_osrelease(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { struct utsname uts; int ret; ret = uname(&uts); if (ret < 0) return -1; return do_write_string(ff, uts.release); } static int write_arch(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { struct utsname uts; int ret; ret = uname(&uts); if (ret < 0) return -1; return do_write_string(ff, uts.machine); } static int write_version(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { return do_write_string(ff, perf_version_string); } static int __write_cpudesc(struct feat_fd *ff, const char *cpuinfo_proc) { FILE *file; char *buf = NULL; char *s, *p; const char *search = cpuinfo_proc; size_t len = 0; int ret = -1; if (!search) return -1; file = fopen("/proc/cpuinfo", "r"); if (!file) return -1; while (getline(&buf, &len, file) > 0) { ret = strncmp(buf, search, strlen(search)); if (!ret) break; } if (ret) { ret = -1; goto done; } s = buf; p = strchr(buf, ':'); if (p && *(p+1) == ' ' && *(p+2)) s = p + 2; p = strchr(s, '\n'); if (p) *p = '\0'; /* squash extra space characters (branding string) */ p = s; while (*p) { if (isspace(*p)) { char *r = p + 1; char *q = r; *p = ' '; while (*q && isspace(*q)) q++; if (q != (p+1)) while ((*r++ = *q++)); } p++; } ret = do_write_string(ff, s); done: free(buf); fclose(file); return ret; } static int write_cpudesc(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { const char *cpuinfo_procs[] = CPUINFO_PROC; unsigned int i; for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) { int ret; ret = __write_cpudesc(ff, cpuinfo_procs[i]); if (ret >= 0) return ret; } return -1; } static int write_nrcpus(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { long nr; u32 nrc, nra; int ret; nrc = cpu__max_present_cpu(); nr = sysconf(_SC_NPROCESSORS_ONLN); if (nr < 0) return -1; nra = (u32)(nr & UINT_MAX); ret = do_write(ff, &nrc, sizeof(nrc)); if (ret < 0) return ret; return do_write(ff, &nra, sizeof(nra)); } static int write_event_desc(struct feat_fd *ff, struct perf_evlist *evlist) { struct perf_evsel *evsel; u32 nre, nri, sz; int ret; nre = evlist->nr_entries; /* * write number of events */ ret = do_write(ff, &nre, sizeof(nre)); if (ret < 0) return ret; /* * size of perf_event_attr struct */ sz = (u32)sizeof(evsel->attr); ret = do_write(ff, &sz, sizeof(sz)); if (ret < 0) return ret; evlist__for_each_entry(evlist, evsel) { ret = do_write(ff, &evsel->attr, sz); if (ret < 0) return ret; /* * write number of unique id per event * there is one id per instance of an event * * copy into an nri to be independent of the * type of ids, */ nri = evsel->ids; ret = do_write(ff, &nri, sizeof(nri)); if (ret < 0) return ret; /* * write event string as passed on cmdline */ ret = do_write_string(ff, perf_evsel__name(evsel)); if (ret < 0) return ret; /* * write unique ids for this event */ ret = do_write(ff, evsel->id, evsel->ids * sizeof(u64)); if (ret < 0) return ret; } return 0; } static int write_cmdline(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { char buf[MAXPATHLEN]; u32 n; int i, ret; /* actual path to perf binary */ ret = readlink("/proc/self/exe", buf, sizeof(buf) - 1); if (ret <= 0) return -1; /* readlink() does not add null termination */ buf[ret] = '\0'; /* account for binary path */ n = perf_env.nr_cmdline + 1; ret = do_write(ff, &n, sizeof(n)); if (ret < 0) return ret; ret = do_write_string(ff, buf); if (ret < 0) return ret; for (i = 0 ; i < perf_env.nr_cmdline; i++) { ret = do_write_string(ff, perf_env.cmdline_argv[i]); if (ret < 0) return ret; } return 0; } #define CORE_SIB_FMT \ "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list" #define THRD_SIB_FMT \ "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list" struct cpu_topo { u32 cpu_nr; u32 core_sib; u32 thread_sib; char **core_siblings; char **thread_siblings; }; static int build_cpu_topo(struct cpu_topo *tp, int cpu) { FILE *fp; char filename[MAXPATHLEN]; char *buf = NULL, *p; size_t len = 0; ssize_t sret; u32 i = 0; int ret = -1; sprintf(filename, CORE_SIB_FMT, cpu); fp = fopen(filename, "r"); if (!fp) goto try_threads; sret = getline(&buf, &len, fp); fclose(fp); if (sret <= 0) goto try_threads; p = strchr(buf, '\n'); if (p) *p = '\0'; for (i = 0; i < tp->core_sib; i++) { if (!strcmp(buf, tp->core_siblings[i])) break; } if (i == tp->core_sib) { tp->core_siblings[i] = buf; tp->core_sib++; buf = NULL; len = 0; } ret = 0; try_threads: sprintf(filename, THRD_SIB_FMT, cpu); fp = fopen(filename, "r"); if (!fp) goto done; if (getline(&buf, &len, fp) <= 0) goto done; p = strchr(buf, '\n'); if (p) *p = '\0'; for (i = 0; i < tp->thread_sib; i++) { if (!strcmp(buf, tp->thread_siblings[i])) break; } if (i == tp->thread_sib) { tp->thread_siblings[i] = buf; tp->thread_sib++; buf = NULL; } ret = 0; done: if(fp) fclose(fp); free(buf); return ret; } static void free_cpu_topo(struct cpu_topo *tp) { u32 i; if (!tp) return; for (i = 0 ; i < tp->core_sib; i++) zfree(&tp->core_siblings[i]); for (i = 0 ; i < tp->thread_sib; i++) zfree(&tp->thread_siblings[i]); free(tp); } static struct cpu_topo *build_cpu_topology(void) { struct cpu_topo *tp = NULL; void *addr; u32 nr, i; size_t sz; long ncpus; int ret = -1; struct cpu_map *map; ncpus = cpu__max_present_cpu(); /* build online CPU map */ map = cpu_map__new(NULL); if (map == NULL) { pr_debug("failed to get system cpumap\n"); return NULL; } nr = (u32)(ncpus & UINT_MAX); sz = nr * sizeof(char *); addr = calloc(1, sizeof(*tp) + 2 * sz); if (!addr) goto out_free; tp = addr; tp->cpu_nr = nr; addr += sizeof(*tp); tp->core_siblings = addr; addr += sz; tp->thread_siblings = addr; for (i = 0; i < nr; i++) { if (!cpu_map__has(map, i)) continue; ret = build_cpu_topo(tp, i); if (ret < 0) break; } out_free: cpu_map__put(map); if (ret) { free_cpu_topo(tp); tp = NULL; } return tp; } static int write_cpu_topology(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { struct cpu_topo *tp; u32 i; int ret, j; tp = build_cpu_topology(); if (!tp) return -1; ret = do_write(ff, &tp->core_sib, sizeof(tp->core_sib)); if (ret < 0) goto done; for (i = 0; i < tp->core_sib; i++) { ret = do_write_string(ff, tp->core_siblings[i]); if (ret < 0) goto done; } ret = do_write(ff, &tp->thread_sib, sizeof(tp->thread_sib)); if (ret < 0) goto done; for (i = 0; i < tp->thread_sib; i++) { ret = do_write_string(ff, tp->thread_siblings[i]); if (ret < 0) break; } ret = perf_env__read_cpu_topology_map(&perf_env); if (ret < 0) goto done; for (j = 0; j < perf_env.nr_cpus_avail; j++) { ret = do_write(ff, &perf_env.cpu[j].core_id, sizeof(perf_env.cpu[j].core_id)); if (ret < 0) return ret; ret = do_write(ff, &perf_env.cpu[j].socket_id, sizeof(perf_env.cpu[j].socket_id)); if (ret < 0) return ret; } done: free_cpu_topo(tp); return ret; } static int write_total_mem(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { char *buf = NULL; FILE *fp; size_t len = 0; int ret = -1, n; uint64_t mem; fp = fopen("/proc/meminfo", "r"); if (!fp) return -1; while (getline(&buf, &len, fp) > 0) { ret = strncmp(buf, "MemTotal:", 9); if (!ret) break; } if (!ret) { n = sscanf(buf, "%*s %"PRIu64, &mem); if (n == 1) ret = do_write(ff, &mem, sizeof(mem)); } else ret = -1; free(buf); fclose(fp); return ret; } static int write_topo_node(struct feat_fd *ff, int node) { char str[MAXPATHLEN]; char field[32]; char *buf = NULL, *p; size_t len = 0; FILE *fp; u64 mem_total, mem_free, mem; int ret = -1; sprintf(str, "/sys/devices/system/node/node%d/meminfo", node); fp = fopen(str, "r"); if (!fp) return -1; while (getline(&buf, &len, fp) > 0) { /* skip over invalid lines */ if (!strchr(buf, ':')) continue; if (sscanf(buf, "%*s %*d %31s %"PRIu64, field, &mem) != 2) goto done; if (!strcmp(field, "MemTotal:")) mem_total = mem; if (!strcmp(field, "MemFree:")) mem_free = mem; } fclose(fp); fp = NULL; ret = do_write(ff, &mem_total, sizeof(u64)); if (ret) goto done; ret = do_write(ff, &mem_free, sizeof(u64)); if (ret) goto done; ret = -1; sprintf(str, "/sys/devices/system/node/node%d/cpulist", node); fp = fopen(str, "r"); if (!fp) goto done; if (getline(&buf, &len, fp) <= 0) goto done; p = strchr(buf, '\n'); if (p) *p = '\0'; ret = do_write_string(ff, buf); done: free(buf); if (fp) fclose(fp); return ret; } static int write_numa_topology(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { char *buf = NULL; size_t len = 0; FILE *fp; struct cpu_map *node_map = NULL; char *c; u32 nr, i, j; int ret = -1; fp = fopen("/sys/devices/system/node/online", "r"); if (!fp) return -1; if (getline(&buf, &len, fp) <= 0) goto done; c = strchr(buf, '\n'); if (c) *c = '\0'; node_map = cpu_map__new(buf); if (!node_map) goto done; nr = (u32)node_map->nr; ret = do_write(ff, &nr, sizeof(nr)); if (ret < 0) goto done; for (i = 0; i < nr; i++) { j = (u32)node_map->map[i]; ret = do_write(ff, &j, sizeof(j)); if (ret < 0) break; ret = write_topo_node(ff, i); if (ret < 0) break; } done: free(buf); fclose(fp); cpu_map__put(node_map); return ret; } /* * File format: * * struct pmu_mappings { * u32 pmu_num; * struct pmu_map { * u32 type; * char name[]; * }[pmu_num]; * }; */ static int write_pmu_mappings(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { struct perf_pmu *pmu = NULL; u32 pmu_num = 0; int ret; /* * Do a first pass to count number of pmu to avoid lseek so this * works in pipe mode as well. */ while ((pmu = perf_pmu__scan(pmu))) { if (!pmu->name) continue; pmu_num++; } ret = do_write(ff, &pmu_num, sizeof(pmu_num)); if (ret < 0) return ret; while ((pmu = perf_pmu__scan(pmu))) { if (!pmu->name) continue; ret = do_write(ff, &pmu->type, sizeof(pmu->type)); if (ret < 0) return ret; ret = do_write_string(ff, pmu->name); if (ret < 0) return ret; } return 0; } /* * File format: * * struct group_descs { * u32 nr_groups; * struct group_desc { * char name[]; * u32 leader_idx; * u32 nr_members; * }[nr_groups]; * }; */ static int write_group_desc(struct feat_fd *ff, struct perf_evlist *evlist) { u32 nr_groups = evlist->nr_groups; struct perf_evsel *evsel; int ret; ret = do_write(ff, &nr_groups, sizeof(nr_groups)); if (ret < 0) return ret; evlist__for_each_entry(evlist, evsel) { if (perf_evsel__is_group_leader(evsel) && evsel->nr_members > 1) { const char *name = evsel->group_name ?: "{anon_group}"; u32 leader_idx = evsel->idx; u32 nr_members = evsel->nr_members; ret = do_write_string(ff, name); if (ret < 0) return ret; ret = do_write(ff, &leader_idx, sizeof(leader_idx)); if (ret < 0) return ret; ret = do_write(ff, &nr_members, sizeof(nr_members)); if (ret < 0) return ret; } } return 0; } /* * Return the CPU id as a raw string. * * Each architecture should provide a more precise id string that * can be use to match the architecture's "mapfile". */ char * __weak get_cpuid_str(struct perf_pmu *pmu __maybe_unused) { return NULL; } /* Return zero when the cpuid from the mapfile.csv matches the * cpuid string generated on this platform. * Otherwise return non-zero. */ int __weak strcmp_cpuid_str(const char *mapcpuid, const char *cpuid) { regex_t re; regmatch_t pmatch[1]; int match; if (regcomp(&re, mapcpuid, REG_EXTENDED) != 0) { /* Warn unable to generate match particular string. */ pr_info("Invalid regular expression %s\n", mapcpuid); return 1; } match = !regexec(&re, cpuid, 1, pmatch, 0); regfree(&re); if (match) { size_t match_len = (pmatch[0].rm_eo - pmatch[0].rm_so); /* Verify the entire string matched. */ if (match_len == strlen(cpuid)) return 0; } return 1; } /* * default get_cpuid(): nothing gets recorded * actual implementation must be in arch/$(SRCARCH)/util/header.c */ int __weak get_cpuid(char *buffer __maybe_unused, size_t sz __maybe_unused) { return -1; } static int write_cpuid(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { char buffer[64]; int ret; ret = get_cpuid(buffer, sizeof(buffer)); if (!ret) goto write_it; return -1; write_it: return do_write_string(ff, buffer); } static int write_branch_stack(struct feat_fd *ff __maybe_unused, struct perf_evlist *evlist __maybe_unused) { return 0; } static int write_auxtrace(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { struct perf_session *session; int err; if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__)) return -1; session = container_of(ff->ph, struct perf_session, header); err = auxtrace_index__write(ff->fd, &session->auxtrace_index); if (err < 0) pr_err("Failed to write auxtrace index\n"); return err; } static int write_clockid(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { return do_write(ff, &ff->ph->env.clockid_res_ns, sizeof(ff->ph->env.clockid_res_ns)); } static int cpu_cache_level__sort(const void *a, const void *b) { struct cpu_cache_level *cache_a = (struct cpu_cache_level *)a; struct cpu_cache_level *cache_b = (struct cpu_cache_level *)b; return cache_a->level - cache_b->level; } static bool cpu_cache_level__cmp(struct cpu_cache_level *a, struct cpu_cache_level *b) { if (a->level != b->level) return false; if (a->line_size != b->line_size) return false; if (a->sets != b->sets) return false; if (a->ways != b->ways) return false; if (strcmp(a->type, b->type)) return false; if (strcmp(a->size, b->size)) return false; if (strcmp(a->map, b->map)) return false; return true; } static int cpu_cache_level__read(struct cpu_cache_level *cache, u32 cpu, u16 level) { char path[PATH_MAX], file[PATH_MAX]; struct stat st; size_t len; scnprintf(path, PATH_MAX, "devices/system/cpu/cpu%d/cache/index%d/", cpu, level); scnprintf(file, PATH_MAX, "%s/%s", sysfs__mountpoint(), path); if (stat(file, &st)) return 1; scnprintf(file, PATH_MAX, "%s/level", path); if (sysfs__read_int(file, (int *) &cache->level)) return -1; scnprintf(file, PATH_MAX, "%s/coherency_line_size", path); if (sysfs__read_int(file, (int *) &cache->line_size)) return -1; scnprintf(file, PATH_MAX, "%s/number_of_sets", path); if (sysfs__read_int(file, (int *) &cache->sets)) return -1; scnprintf(file, PATH_MAX, "%s/ways_of_associativity", path); if (sysfs__read_int(file, (int *) &cache->ways)) return -1; scnprintf(file, PATH_MAX, "%s/type", path); if (sysfs__read_str(file, &cache->type, &len)) return -1; cache->type[len] = 0; cache->type = rtrim(cache->type); scnprintf(file, PATH_MAX, "%s/size", path); if (sysfs__read_str(file, &cache->size, &len)) { free(cache->type); return -1; } cache->size[len] = 0; cache->size = rtrim(cache->size); scnprintf(file, PATH_MAX, "%s/shared_cpu_list", path); if (sysfs__read_str(file, &cache->map, &len)) { free(cache->map); free(cache->type); return -1; } cache->map[len] = 0; cache->map = rtrim(cache->map); return 0; } static void cpu_cache_level__fprintf(FILE *out, struct cpu_cache_level *c) { fprintf(out, "L%d %-15s %8s [%s]\n", c->level, c->type, c->size, c->map); } static int build_caches(struct cpu_cache_level caches[], u32 size, u32 *cntp) { u32 i, cnt = 0; long ncpus; u32 nr, cpu; u16 level; ncpus = sysconf(_SC_NPROCESSORS_CONF); if (ncpus < 0) return -1; nr = (u32)(ncpus & UINT_MAX); for (cpu = 0; cpu < nr; cpu++) { for (level = 0; level < 10; level++) { struct cpu_cache_level c; int err; err = cpu_cache_level__read(&c, cpu, level); if (err < 0) return err; if (err == 1) break; for (i = 0; i < cnt; i++) { if (cpu_cache_level__cmp(&c, &caches[i])) break; } if (i == cnt) caches[cnt++] = c; else cpu_cache_level__free(&c); if (WARN_ONCE(cnt == size, "way too many cpu caches..")) goto out; } } out: *cntp = cnt; return 0; } #define MAX_CACHES 2000 static int write_cache(struct feat_fd *ff, struct perf_evlist *evlist __maybe_unused) { struct cpu_cache_level caches[MAX_CACHES]; u32 cnt = 0, i, version = 1; int ret; ret = build_caches(caches, MAX_CACHES, &cnt); if (ret) goto out; qsort(&caches, cnt, sizeof(struct cpu_cache_level), cpu_cache_level__sort); ret = do_write(ff, &version, sizeof(u32)); if (ret < 0) goto out; ret = do_write(ff, &cnt, sizeof(u32)); if (ret < 0) goto out; for (i = 0; i < cnt; i++) { struct cpu_cache_level *c = &caches[i]; #define _W(v) \ ret = do_write(ff, &c->v, sizeof(u32)); \ if (ret < 0) \ goto out; _W(level) _W(line_size) _W(sets) _W(ways) #undef _W #define _W(v) \ ret = do_write_string(ff, (const char *) c->v); \ if (ret < 0) \ goto out; _W(type) _W(size) _W(map) #undef _W } out: for (i = 0; i < cnt; i++) cpu_cache_level__free(&caches[i]); return ret; } static int write_stat(struct feat_fd *ff __maybe_unused, struct perf_evlist *evlist __maybe_unused) { return 0; } static int write_sample_time(struct feat_fd *ff, struct perf_evlist *evlist) { int ret; ret = do_write(ff, &evlist->first_sample_time, sizeof(evlist->first_sample_time)); if (ret < 0) return ret; return do_write(ff, &evlist->last_sample_time, sizeof(evlist->last_sample_time)); } static int memory_node__read(struct memory_node *n, unsigned long idx) { unsigned int phys, size = 0; char path[PATH_MAX]; struct dirent *ent; DIR *dir; #define for_each_memory(mem, dir) \ while ((ent = readdir(dir))) \ if (strcmp(ent->d_name, ".") && \ strcmp(ent->d_name, "..") && \ sscanf(ent->d_name, "memory%u", &mem) == 1) scnprintf(path, PATH_MAX, "%s/devices/system/node/node%lu", sysfs__mountpoint(), idx); dir = opendir(path); if (!dir) { pr_warning("failed: cant' open memory sysfs data\n"); return -1; } for_each_memory(phys, dir) { size = max(phys, size); } size++; n->set = bitmap_alloc(size); if (!n->set) { closedir(dir); return -ENOMEM; } n->node = idx; n->size = size; rewinddir(dir); for_each_memory(phys, dir) { set_bit(phys, n->set); } closedir(dir); return 0; } static int memory_node__sort(const void *a, const void *b) { const struct memory_node *na = a; const struct memory_node *nb = b; return na->node - nb->node; } static int build_mem_topology(struct memory_node *nodes, u64 size, u64 *cntp) { char path[PATH_MAX]; struct dirent *ent; DIR *dir; u64 cnt = 0; int ret = 0; scnprintf(path, PATH_MAX, "%s/devices/system/node/", sysfs__mountpoint()); dir = opendir(path); if (!dir) { pr_debug2("%s: could't read %s, does this arch have topology information?\n", __func__, path); return -1; } while (!ret && (ent = readdir(dir))) { unsigned int idx; int r; if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) continue; r = sscanf(ent->d_name, "node%u", &idx); if (r != 1) continue; if (WARN_ONCE(cnt >= size, "failed to write MEM_TOPOLOGY, way too many nodes\n")) return -1; ret = memory_node__read(&nodes[cnt++], idx); } *cntp = cnt; closedir(dir); if (!ret) qsort(nodes, cnt, sizeof(nodes[0]), memory_node__sort); return ret; } #define MAX_MEMORY_NODES 2000 /* * The MEM_TOPOLOGY holds physical memory map for every * node in system. The format of data is as follows: * * 0 - version | for future changes * 8 - block_size_bytes | /sys/devices/system/memory/block_size_bytes * 16 - count | number of nodes * * For each node we store map of physical indexes for * each node: * * 32 - node id | node index * 40 - size | size of bitmap * 48 - bitmap | bitmap of memory indexes that belongs to node */ static int write_mem_topology(struct feat_fd *ff __maybe_unused, struct perf_evlist *evlist __maybe_unused) { static struct memory_node nodes[MAX_MEMORY_NODES]; u64 bsize, version = 1, i, nr; int ret; ret = sysfs__read_xll("devices/system/memory/block_size_bytes", (unsigned long long *) &bsize); if (ret) return ret; ret = build_mem_topology(&nodes[0], MAX_MEMORY_NODES, &nr); if (ret) return ret; ret = do_write(ff, &version, sizeof(version)); if (ret < 0) goto out; ret = do_write(ff, &bsize, sizeof(bsize)); if (ret < 0) goto out; ret = do_write(ff, &nr, sizeof(nr)); if (ret < 0) goto out; for (i = 0; i < nr; i++) { struct memory_node *n = &nodes[i]; #define _W(v) \ ret = do_write(ff, &n->v, sizeof(n->v)); \ if (ret < 0) \ goto out; _W(node) _W(size) #undef _W ret = do_write_bitmap(ff, n->set, n->size); if (ret < 0) goto out; } out: return ret; } static void print_hostname(struct feat_fd *ff, FILE *fp) { fprintf(fp, "# hostname : %s\n", ff->ph->env.hostname); } static void print_osrelease(struct feat_fd *ff, FILE *fp) { fprintf(fp, "# os release : %s\n", ff->ph->env.os_release); } static void print_arch(struct feat_fd *ff, FILE *fp) { fprintf(fp, "# arch : %s\n", ff->ph->env.arch); } static void print_cpudesc(struct feat_fd *ff, FILE *fp) { fprintf(fp, "# cpudesc : %s\n", ff->ph->env.cpu_desc); } static void print_nrcpus(struct feat_fd *ff, FILE *fp) { fprintf(fp, "# nrcpus online : %u\n", ff->ph->env.nr_cpus_online); fprintf(fp, "# nrcpus avail : %u\n", ff->ph->env.nr_cpus_avail); } static void print_version(struct feat_fd *ff, FILE *fp) { fprintf(fp, "# perf version : %s\n", ff->ph->env.version); } static void print_cmdline(struct feat_fd *ff, FILE *fp) { int nr, i; nr = ff->ph->env.nr_cmdline; fprintf(fp, "# cmdline : "); for (i = 0; i < nr; i++) { char *argv_i = strdup(ff->ph->env.cmdline_argv[i]); if (!argv_i) { fprintf(fp, "%s ", ff->ph->env.cmdline_argv[i]); } else { char *mem = argv_i; do { char *quote = strchr(argv_i, '\''); if (!quote) break; *quote++ = '\0'; fprintf(fp, "%s\\\'", argv_i); argv_i = quote; } while (1); fprintf(fp, "%s ", argv_i); free(mem); } } fputc('\n', fp); } static void print_cpu_topology(struct feat_fd *ff, FILE *fp) { struct perf_header *ph = ff->ph; int cpu_nr = ph->env.nr_cpus_avail; int nr, i; char *str; nr = ph->env.nr_sibling_cores; str = ph->env.sibling_cores; for (i = 0; i < nr; i++) { fprintf(fp, "# sibling cores : %s\n", str); str += strlen(str) + 1; } nr = ph->env.nr_sibling_threads; str = ph->env.sibling_threads; for (i = 0; i < nr; i++) { fprintf(fp, "# sibling threads : %s\n", str); str += strlen(str) + 1; } if (ph->env.cpu != NULL) { for (i = 0; i < cpu_nr; i++) fprintf(fp, "# CPU %d: Core ID %d, Socket ID %d\n", i, ph->env.cpu[i].core_id, ph->env.cpu[i].socket_id); } else fprintf(fp, "# Core ID and Socket ID information is not available\n"); } static void print_clockid(struct feat_fd *ff, FILE *fp) { fprintf(fp, "# clockid frequency: %"PRIu64" MHz\n", ff->ph->env.clockid_res_ns * 1000); } static void free_event_desc(struct perf_evsel *events) { struct perf_evsel *evsel; if (!events) return; for (evsel = events; evsel->attr.size; evsel++) { zfree(&evsel->name); zfree(&evsel->id); } free(events); } static struct perf_evsel *read_event_desc(struct feat_fd *ff) { struct perf_evsel *evsel, *events = NULL; u64 *id; void *buf = NULL; u32 nre, sz, nr, i, j; size_t msz; /* number of events */ if (do_read_u32(ff, &nre)) goto error; if (do_read_u32(ff, &sz)) goto error; /* buffer to hold on file attr struct */ buf = malloc(sz); if (!buf) goto error; /* the last event terminates with evsel->attr.size == 0: */ events = calloc(nre + 1, sizeof(*events)); if (!events) goto error; msz = sizeof(evsel->attr); if (sz < msz) msz = sz; for (i = 0, evsel = events; i < nre; evsel++, i++) { evsel->idx = i; /* * must read entire on-file attr struct to * sync up with layout. */ if (__do_read(ff, buf, sz)) goto error; if (ff->ph->needs_swap) perf_event__attr_swap(buf); memcpy(&evsel->attr, buf, msz); if (do_read_u32(ff, &nr)) goto error; if (ff->ph->needs_swap) evsel->needs_swap = true; evsel->name = do_read_string(ff); if (!evsel->name) goto error; if (!nr) continue; id = calloc(nr, sizeof(*id)); if (!id) goto error; evsel->ids = nr; evsel->id = id; for (j = 0 ; j < nr; j++) { if (do_read_u64(ff, id)) goto error; id++; } } out: free(buf); return events; error: free_event_desc(events); events = NULL; goto out; } static int __desc_attr__fprintf(FILE *fp, const char *name, const char *val, void *priv __maybe_unused) { return fprintf(fp, ", %s = %s", name, val); } static void print_event_desc(struct feat_fd *ff, FILE *fp) { struct perf_evsel *evsel, *events; u32 j; u64 *id; if (ff->events) events = ff->events; else events = read_event_desc(ff); if (!events) { fprintf(fp, "# event desc: not available or unable to read\n"); return; } for (evsel = events; evsel->attr.size; evsel++) { fprintf(fp, "# event : name = %s, ", evsel->name); if (evsel->ids) { fprintf(fp, ", id = {"); for (j = 0, id = evsel->id; j < evsel->ids; j++, id++) { if (j) fputc(',', fp); fprintf(fp, " %"PRIu64, *id); } fprintf(fp, " }"); } perf_event_attr__fprintf(fp, &evsel->attr, __desc_attr__fprintf, NULL); fputc('\n', fp); } free_event_desc(events); ff->events = NULL; } static void print_total_mem(struct feat_fd *ff, FILE *fp) { fprintf(fp, "# total memory : %llu kB\n", ff->ph->env.total_mem); } static void print_numa_topology(struct feat_fd *ff, FILE *fp) { int i; struct numa_node *n; for (i = 0; i < ff->ph->env.nr_numa_nodes; i++) { n = &ff->ph->env.numa_nodes[i]; fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB," " free = %"PRIu64" kB\n", n->node, n->mem_total, n->mem_free); fprintf(fp, "# node%u cpu list : ", n->node); cpu_map__fprintf(n->map, fp); } } static void print_cpuid(struct feat_fd *ff, FILE *fp) { fprintf(fp, "# cpuid : %s\n", ff->ph->env.cpuid); } static void print_branch_stack(struct feat_fd *ff __maybe_unused, FILE *fp) { fprintf(fp, "# contains samples with branch stack\n"); } static void print_auxtrace(struct feat_fd *ff __maybe_unused, FILE *fp) { fprintf(fp, "# contains AUX area data (e.g. instruction trace)\n"); } static void print_stat(struct feat_fd *ff __maybe_unused, FILE *fp) { fprintf(fp, "# contains stat data\n"); } static void print_cache(struct feat_fd *ff, FILE *fp __maybe_unused) { int i; fprintf(fp, "# CPU cache info:\n"); for (i = 0; i < ff->ph->env.caches_cnt; i++) { fprintf(fp, "# "); cpu_cache_level__fprintf(fp, &ff->ph->env.caches[i]); } } static void print_pmu_mappings(struct feat_fd *ff, FILE *fp) { const char *delimiter = "# pmu mappings: "; char *str, *tmp; u32 pmu_num; u32 type; pmu_num = ff->ph->env.nr_pmu_mappings; if (!pmu_num) { fprintf(fp, "# pmu mappings: not available\n"); return; } str = ff->ph->env.pmu_mappings; while (pmu_num) { type = strtoul(str, &tmp, 0); if (*tmp != ':') goto error; str = tmp + 1; fprintf(fp, "%s%s = %" PRIu32, delimiter, str, type); delimiter = ", "; str += strlen(str) + 1; pmu_num--; } fprintf(fp, "\n"); if (!pmu_num) return; error: fprintf(fp, "# pmu mappings: unable to read\n"); } static void print_group_desc(struct feat_fd *ff, FILE *fp) { struct perf_session *session; struct perf_evsel *evsel; u32 nr = 0; session = container_of(ff->ph, struct perf_session, header); evlist__for_each_entry(session->evlist, evsel) { if (perf_evsel__is_group_leader(evsel) && evsel->nr_members > 1) { fprintf(fp, "# group: %s{%s", evsel->group_name ?: "", perf_evsel__name(evsel)); nr = evsel->nr_members - 1; } else if (nr) { fprintf(fp, ",%s", perf_evsel__name(evsel)); if (--nr == 0) fprintf(fp, "}\n"); } } } static void print_sample_time(struct feat_fd *ff, FILE *fp) { struct perf_session *session; char time_buf[32]; double d; session = container_of(ff->ph, struct perf_session, header); timestamp__scnprintf_usec(session->evlist->first_sample_time, time_buf, sizeof(time_buf)); fprintf(fp, "# time of first sample : %s\n", time_buf); timestamp__scnprintf_usec(session->evlist->last_sample_time, time_buf, sizeof(time_buf)); fprintf(fp, "# time of last sample : %s\n", time_buf); d = (double)(session->evlist->last_sample_time - session->evlist->first_sample_time) / NSEC_PER_MSEC; fprintf(fp, "# sample duration : %10.3f ms\n", d); } static void memory_node__fprintf(struct memory_node *n, unsigned long long bsize, FILE *fp) { char buf_map[100], buf_size[50]; unsigned long long size; size = bsize * bitmap_weight(n->set, n->size); unit_number__scnprintf(buf_size, 50, size); bitmap_scnprintf(n->set, n->size, buf_map, 100); fprintf(fp, "# %3" PRIu64 " [%s]: %s\n", n->node, buf_size, buf_map); } static void print_mem_topology(struct feat_fd *ff, FILE *fp) { struct memory_node *nodes; int i, nr; nodes = ff->ph->env.memory_nodes; nr = ff->ph->env.nr_memory_nodes; fprintf(fp, "# memory nodes (nr %d, block size 0x%llx):\n", nr, ff->ph->env.memory_bsize); for (i = 0; i < nr; i++) { memory_node__fprintf(&nodes[i], ff->ph->env.memory_bsize, fp); } } static int __event_process_build_id(struct build_id_event *bev, char *filename, struct perf_session *session) { int err = -1; struct machine *machine; u16 cpumode; struct dso *dso; enum dso_kernel_type dso_type; machine = perf_session__findnew_machine(session, bev->pid); if (!machine) goto out; cpumode = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; switch (cpumode) { case PERF_RECORD_MISC_KERNEL: dso_type = DSO_TYPE_KERNEL; break; case PERF_RECORD_MISC_GUEST_KERNEL: dso_type = DSO_TYPE_GUEST_KERNEL; break; case PERF_RECORD_MISC_USER: case PERF_RECORD_MISC_GUEST_USER: dso_type = DSO_TYPE_USER; break; default: goto out; } dso = machine__findnew_dso(machine, filename); if (dso != NULL) { char sbuild_id[SBUILD_ID_SIZE]; dso__set_build_id(dso, &bev->build_id); if (dso_type != DSO_TYPE_USER) { struct kmod_path m = { .name = NULL, }; if (!kmod_path__parse_name(&m, filename) && m.kmod) dso__set_module_info(dso, &m, machine); else dso->kernel = dso_type; free(m.name); } build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); pr_debug("build id event received for %s: %s\n", dso->long_name, sbuild_id); dso__put(dso); } err = 0; out: return err; } static int perf_header__read_build_ids_abi_quirk(struct perf_header *header, int input, u64 offset, u64 size) { struct perf_session *session = container_of(header, struct perf_session, header); struct { struct perf_event_header header; u8 build_id[PERF_ALIGN(BUILD_ID_SIZE, sizeof(u64))]; char filename[0]; } old_bev; struct build_id_event bev; char filename[PATH_MAX]; u64 limit = offset + size; while (offset < limit) { ssize_t len; if (readn(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev)) return -1; if (header->needs_swap) perf_event_header__bswap(&old_bev.header); len = old_bev.header.size - sizeof(old_bev); if (readn(input, filename, len) != len) return -1; bev.header = old_bev.header; /* * As the pid is the missing value, we need to fill * it properly. The header.misc value give us nice hint. */ bev.pid = HOST_KERNEL_ID; if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER || bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL) bev.pid = DEFAULT_GUEST_KERNEL_ID; memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id)); __event_process_build_id(&bev, filename, session); offset += bev.header.size; } return 0; } static int perf_header__read_build_ids(struct perf_header *header, int input, u64 offset, u64 size) { struct perf_session *session = container_of(header, struct perf_session, header); struct build_id_event bev; char filename[PATH_MAX]; u64 limit = offset + size, orig_offset = offset; int err = -1; while (offset < limit) { ssize_t len; if (readn(input, &bev, sizeof(bev)) != sizeof(bev)) goto out; if (header->needs_swap) perf_event_header__bswap(&bev.header); len = bev.header.size - sizeof(bev); if (readn(input, filename, len) != len) goto out; /* * The a1645ce1 changeset: * * "perf: 'perf kvm' tool for monitoring guest performance from host" * * Added a field to struct build_id_event that broke the file * format. * * Since the kernel build-id is the first entry, process the * table using the old format if the well known * '[kernel.kallsyms]' string for the kernel build-id has the * first 4 characters chopped off (where the pid_t sits). */ if (memcmp(filename, "nel.kallsyms]", 13) == 0) { if (lseek(input, orig_offset, SEEK_SET) == (off_t)-1) return -1; return perf_header__read_build_ids_abi_quirk(header, input, offset, size); } __event_process_build_id(&bev, filename, session); offset += bev.header.size; } err = 0; out: return err; } /* Macro for features that simply need to read and store a string. */ #define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \ static int process_##__feat(struct feat_fd *ff, void *data __maybe_unused) \ {\ ff->ph->env.__feat_env = do_read_string(ff); \ return ff->ph->env.__feat_env ? 0 : -ENOMEM; \ } FEAT_PROCESS_STR_FUN(hostname, hostname); FEAT_PROCESS_STR_FUN(osrelease, os_release); FEAT_PROCESS_STR_FUN(version, version); FEAT_PROCESS_STR_FUN(arch, arch); FEAT_PROCESS_STR_FUN(cpudesc, cpu_desc); FEAT_PROCESS_STR_FUN(cpuid, cpuid); static int process_tracing_data(struct feat_fd *ff, void *data) { ssize_t ret = trace_report(ff->fd, data, false); return ret < 0 ? -1 : 0; } static int process_build_id(struct feat_fd *ff, void *data __maybe_unused) { if (perf_header__read_build_ids(ff->ph, ff->fd, ff->offset, ff->size)) pr_debug("Failed to read buildids, continuing...\n"); return 0; } static int process_nrcpus(struct feat_fd *ff, void *data __maybe_unused) { int ret; u32 nr_cpus_avail, nr_cpus_online; ret = do_read_u32(ff, &nr_cpus_avail); if (ret) return ret; ret = do_read_u32(ff, &nr_cpus_online); if (ret) return ret; ff->ph->env.nr_cpus_avail = (int)nr_cpus_avail; ff->ph->env.nr_cpus_online = (int)nr_cpus_online; return 0; } static int process_total_mem(struct feat_fd *ff, void *data __maybe_unused) { u64 total_mem; int ret; ret = do_read_u64(ff, &total_mem); if (ret) return -1; ff->ph->env.total_mem = (unsigned long long)total_mem; return 0; } static struct perf_evsel * perf_evlist__find_by_index(struct perf_evlist *evlist, int idx) { struct perf_evsel *evsel; evlist__for_each_entry(evlist, evsel) { if (evsel->idx == idx) return evsel; } return NULL; } static void perf_evlist__set_event_name(struct perf_evlist *evlist, struct perf_evsel *event) { struct perf_evsel *evsel; if (!event->name) return; evsel = perf_evlist__find_by_index(evlist, event->idx); if (!evsel) return; if (evsel->name) return; evsel->name = strdup(event->name); } static int process_event_desc(struct feat_fd *ff, void *data __maybe_unused) { struct perf_session *session; struct perf_evsel *evsel, *events = read_event_desc(ff); if (!events) return 0; session = container_of(ff->ph, struct perf_session, header); if (session->data->is_pipe) { /* Save events for reading later by print_event_desc, * since they can't be read again in pipe mode. */ ff->events = events; } for (evsel = events; evsel->attr.size; evsel++) perf_evlist__set_event_name(session->evlist, evsel); if (!session->data->is_pipe) free_event_desc(events); return 0; } static int process_cmdline(struct feat_fd *ff, void *data __maybe_unused) { char *str, *cmdline = NULL, **argv = NULL; u32 nr, i, len = 0; if (do_read_u32(ff, &nr)) return -1; ff->ph->env.nr_cmdline = nr; cmdline = zalloc(ff->size + nr + 1); if (!cmdline) return -1; argv = zalloc(sizeof(char *) * (nr + 1)); if (!argv) goto error; for (i = 0; i < nr; i++) { str = do_read_string(ff); if (!str) goto error; argv[i] = cmdline + len; memcpy(argv[i], str, strlen(str) + 1); len += strlen(str) + 1; free(str); } ff->ph->env.cmdline = cmdline; ff->ph->env.cmdline_argv = (const char **) argv; return 0; error: free(argv); free(cmdline); return -1; } static int process_cpu_topology(struct feat_fd *ff, void *data __maybe_unused) { u32 nr, i; char *str; struct strbuf sb; int cpu_nr = ff->ph->env.nr_cpus_avail; u64 size = 0; struct perf_header *ph = ff->ph; bool do_core_id_test = true; ph->env.cpu = calloc(cpu_nr, sizeof(*ph->env.cpu)); if (!ph->env.cpu) return -1; if (do_read_u32(ff, &nr)) goto free_cpu; ph->env.nr_sibling_cores = nr; size += sizeof(u32); if (strbuf_init(&sb, 128) < 0) goto free_cpu; for (i = 0; i < nr; i++) { str = do_read_string(ff); if (!str) goto error; /* include a NULL character at the end */ if (strbuf_add(&sb, str, strlen(str) + 1) < 0) goto error; size += string_size(str); free(str); } ph->env.sibling_cores = strbuf_detach(&sb, NULL); if (do_read_u32(ff, &nr)) return -1; ph->env.nr_sibling_threads = nr; size += sizeof(u32); for (i = 0; i < nr; i++) { str = do_read_string(ff); if (!str) goto error; /* include a NULL character at the end */ if (strbuf_add(&sb, str, strlen(str) + 1) < 0) goto error; size += string_size(str); free(str); } ph->env.sibling_threads = strbuf_detach(&sb, NULL); /* * The header may be from old perf, * which doesn't include core id and socket id information. */ if (ff->size <= size) { zfree(&ph->env.cpu); return 0; } /* On s390 the socket_id number is not related to the numbers of cpus. * The socket_id number might be higher than the numbers of cpus. * This depends on the configuration. */ if (ph->env.arch && !strncmp(ph->env.arch, "s390", 4)) do_core_id_test = false; for (i = 0; i < (u32)cpu_nr; i++) { if (do_read_u32(ff, &nr)) goto free_cpu; ph->env.cpu[i].core_id = nr; if (do_read_u32(ff, &nr)) goto free_cpu; if (do_core_id_test && nr != (u32)-1 && nr > (u32)cpu_nr) { pr_debug("socket_id number is too big." "You may need to upgrade the perf tool.\n"); goto free_cpu; } ph->env.cpu[i].socket_id = nr; } return 0; error: strbuf_release(&sb); free_cpu: zfree(&ph->env.cpu); return -1; } static int process_numa_topology(struct feat_fd *ff, void *data __maybe_unused) { struct numa_node *nodes, *n; u32 nr, i; char *str; /* nr nodes */ if (do_read_u32(ff, &nr)) return -1; nodes = zalloc(sizeof(*nodes) * nr); if (!nodes) return -ENOMEM; for (i = 0; i < nr; i++) { n = &nodes[i]; /* node number */ if (do_read_u32(ff, &n->node)) goto error; if (do_read_u64(ff, &n->mem_total)) goto error; if (do_read_u64(ff, &n->mem_free)) goto error; str = do_read_string(ff); if (!str) goto error; n->map = cpu_map__new(str); if (!n->map) goto error; free(str); } ff->ph->env.nr_numa_nodes = nr; ff->ph->env.numa_nodes = nodes; return 0; error: free(nodes); return -1; } static int process_pmu_mappings(struct feat_fd *ff, void *data __maybe_unused) { char *name; u32 pmu_num; u32 type; struct strbuf sb; if (do_read_u32(ff, &pmu_num)) return -1; if (!pmu_num) { pr_debug("pmu mappings not available\n"); return 0; } ff->ph->env.nr_pmu_mappings = pmu_num; if (strbuf_init(&sb, 128) < 0) return -1; while (pmu_num) { if (do_read_u32(ff, &type)) goto error; name = do_read_string(ff); if (!name) goto error; if (strbuf_addf(&sb, "%u:%s", type, name) < 0) goto error; /* include a NULL character at the end */ if (strbuf_add(&sb, "", 1) < 0) goto error; if (!strcmp(name, "msr")) ff->ph->env.msr_pmu_type = type; free(name); pmu_num--; } ff->ph->env.pmu_mappings = strbuf_detach(&sb, NULL); return 0; error: strbuf_release(&sb); return -1; } static int process_group_desc(struct feat_fd *ff, void *data __maybe_unused) { size_t ret = -1; u32 i, nr, nr_groups; struct perf_session *session; struct perf_evsel *evsel, *leader = NULL; struct group_desc { char *name; u32 leader_idx; u32 nr_members; } *desc; if (do_read_u32(ff, &nr_groups)) return -1; ff->ph->env.nr_groups = nr_groups; if (!nr_groups) { pr_debug("group desc not available\n"); return 0; } desc = calloc(nr_groups, sizeof(*desc)); if (!desc) return -1; for (i = 0; i < nr_groups; i++) { desc[i].name = do_read_string(ff); if (!desc[i].name) goto out_free; if (do_read_u32(ff, &desc[i].leader_idx)) goto out_free; if (do_read_u32(ff, &desc[i].nr_members)) goto out_free; } /* * Rebuild group relationship based on the group_desc */ session = container_of(ff->ph, struct perf_session, header); session->evlist->nr_groups = nr_groups; i = nr = 0; evlist__for_each_entry(session->evlist, evsel) { if (evsel->idx == (int) desc[i].leader_idx) { evsel->leader = evsel; /* {anon_group} is a dummy name */ if (strcmp(desc[i].name, "{anon_group}")) { evsel->group_name = desc[i].name; desc[i].name = NULL; } evsel->nr_members = desc[i].nr_members; if (i >= nr_groups || nr > 0) { pr_debug("invalid group desc\n"); goto out_free; } leader = evsel; nr = evsel->nr_members - 1; i++; } else if (nr) { /* This is a group member */ evsel->leader = leader; nr--; } } if (i != nr_groups || nr != 0) { pr_debug("invalid group desc\n"); goto out_free; } ret = 0; out_free: for (i = 0; i < nr_groups; i++) zfree(&desc[i].name); free(desc); return ret; } static int process_auxtrace(struct feat_fd *ff, void *data __maybe_unused) { struct perf_session *session; int err; session = container_of(ff->ph, struct perf_session, header); err = auxtrace_index__process(ff->fd, ff->size, session, ff->ph->needs_swap); if (err < 0) pr_err("Failed to process auxtrace index\n"); return err; } static int process_cache(struct feat_fd *ff, void *data __maybe_unused) { struct cpu_cache_level *caches; u32 cnt, i, version; if (do_read_u32(ff, &version)) return -1; if (version != 1) return -1; if (do_read_u32(ff, &cnt)) return -1; caches = zalloc(sizeof(*caches) * cnt); if (!caches) return -1; for (i = 0; i < cnt; i++) { struct cpu_cache_level c; #define _R(v) \ if (do_read_u32(ff, &c.v))\ goto out_free_caches; \ _R(level) _R(line_size) _R(sets) _R(ways) #undef _R #define _R(v) \ c.v = do_read_string(ff); \ if (!c.v) \ goto out_free_caches; _R(type) _R(size) _R(map) #undef _R caches[i] = c; } ff->ph->env.caches = caches; ff->ph->env.caches_cnt = cnt; return 0; out_free_caches: free(caches); return -1; } static int process_sample_time(struct feat_fd *ff, void *data __maybe_unused) { struct perf_session *session; u64 first_sample_time, last_sample_time; int ret; session = container_of(ff->ph, struct perf_session, header); ret = do_read_u64(ff, &first_sample_time); if (ret) return -1; ret = do_read_u64(ff, &last_sample_time); if (ret) return -1; session->evlist->first_sample_time = first_sample_time; session->evlist->last_sample_time = last_sample_time; return 0; } static int process_mem_topology(struct feat_fd *ff, void *data __maybe_unused) { struct memory_node *nodes; u64 version, i, nr, bsize; int ret = -1; if (do_read_u64(ff, &version)) return -1; if (version != 1) return -1; if (do_read_u64(ff, &bsize)) return -1; if (do_read_u64(ff, &nr)) return -1; nodes = zalloc(sizeof(*nodes) * nr); if (!nodes) return -1; for (i = 0; i < nr; i++) { struct memory_node n; #define _R(v) \ if (do_read_u64(ff, &n.v)) \ goto out; \ _R(node) _R(size) #undef _R if (do_read_bitmap(ff, &n.set, &n.size)) goto out; nodes[i] = n; } ff->ph->env.memory_bsize = bsize; ff->ph->env.memory_nodes = nodes; ff->ph->env.nr_memory_nodes = nr; ret = 0; out: if (ret) free(nodes); return ret; } static int process_clockid(struct feat_fd *ff, void *data __maybe_unused) { if (do_read_u64(ff, &ff->ph->env.clockid_res_ns)) return -1; return 0; } struct feature_ops { int (*write)(struct feat_fd *ff, struct perf_evlist *evlist); void (*print)(struct feat_fd *ff, FILE *fp); int (*process)(struct feat_fd *ff, void *data); const char *name; bool full_only; bool synthesize; }; #define FEAT_OPR(n, func, __full_only) \ [HEADER_##n] = { \ .name = __stringify(n), \ .write = write_##func, \ .print = print_##func, \ .full_only = __full_only, \ .process = process_##func, \ .synthesize = true \ } #define FEAT_OPN(n, func, __full_only) \ [HEADER_##n] = { \ .name = __stringify(n), \ .write = write_##func, \ .print = print_##func, \ .full_only = __full_only, \ .process = process_##func \ } /* feature_ops not implemented: */ #define print_tracing_data NULL #define print_build_id NULL #define process_branch_stack NULL #define process_stat NULL static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = { FEAT_OPN(TRACING_DATA, tracing_data, false), FEAT_OPN(BUILD_ID, build_id, false), FEAT_OPR(HOSTNAME, hostname, false), FEAT_OPR(OSRELEASE, osrelease, false), FEAT_OPR(VERSION, version, false), FEAT_OPR(ARCH, arch, false), FEAT_OPR(NRCPUS, nrcpus, false), FEAT_OPR(CPUDESC, cpudesc, false), FEAT_OPR(CPUID, cpuid, false), FEAT_OPR(TOTAL_MEM, total_mem, false), FEAT_OPR(EVENT_DESC, event_desc, false), FEAT_OPR(CMDLINE, cmdline, false), FEAT_OPR(CPU_TOPOLOGY, cpu_topology, true), FEAT_OPR(NUMA_TOPOLOGY, numa_topology, true), FEAT_OPN(BRANCH_STACK, branch_stack, false), FEAT_OPR(PMU_MAPPINGS, pmu_mappings, false), FEAT_OPR(GROUP_DESC, group_desc, false), FEAT_OPN(AUXTRACE, auxtrace, false), FEAT_OPN(STAT, stat, false), FEAT_OPN(CACHE, cache, true), FEAT_OPR(SAMPLE_TIME, sample_time, false), FEAT_OPR(MEM_TOPOLOGY, mem_topology, true), FEAT_OPR(CLOCKID, clockid, false) }; struct header_print_data { FILE *fp; bool full; /* extended list of headers */ }; static int perf_file_section__fprintf_info(struct perf_file_section *section, struct perf_header *ph, int feat, int fd, void *data) { struct header_print_data *hd = data; struct feat_fd ff; if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) { pr_debug("Failed to lseek to %" PRIu64 " offset for feature " "%d, continuing...\n", section->offset, feat); return 0; } if (feat >= HEADER_LAST_FEATURE) { pr_warning("unknown feature %d\n", feat); return 0; } if (!feat_ops[feat].print) return 0; ff = (struct feat_fd) { .fd = fd, .ph = ph, }; if (!feat_ops[feat].full_only || hd->full) feat_ops[feat].print(&ff, hd->fp); else fprintf(hd->fp, "# %s info available, use -I to display\n", feat_ops[feat].name); return 0; } int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full) { struct header_print_data hd; struct perf_header *header = &session->header; int fd = perf_data__fd(session->data); struct stat st; time_t stctime; int ret, bit; hd.fp = fp; hd.full = full; ret = fstat(fd, &st); if (ret == -1) return -1; stctime = st.st_ctime; fprintf(fp, "# captured on : %s", ctime(&stctime)); fprintf(fp, "# header version : %u\n", header->version); fprintf(fp, "# data offset : %" PRIu64 "\n", header->data_offset); fprintf(fp, "# data size : %" PRIu64 "\n", header->data_size); fprintf(fp, "# feat offset : %" PRIu64 "\n", header->feat_offset); perf_header__process_sections(header, fd, &hd, perf_file_section__fprintf_info); if (session->data->is_pipe) return 0; fprintf(fp, "# missing features: "); for_each_clear_bit(bit, header->adds_features, HEADER_LAST_FEATURE) { if (bit) fprintf(fp, "%s ", feat_ops[bit].name); } fprintf(fp, "\n"); return 0; } static int do_write_feat(struct feat_fd *ff, int type, struct perf_file_section **p, struct perf_evlist *evlist) { int err; int ret = 0; if (perf_header__has_feat(ff->ph, type)) { if (!feat_ops[type].write) return -1; if (WARN(ff->buf, "Error: calling %s in pipe-mode.\n", __func__)) return -1; (*p)->offset = lseek(ff->fd, 0, SEEK_CUR); err = feat_ops[type].write(ff, evlist); if (err < 0) { pr_debug("failed to write feature %s\n", feat_ops[type].name); /* undo anything written */ lseek(ff->fd, (*p)->offset, SEEK_SET); return -1; } (*p)->size = lseek(ff->fd, 0, SEEK_CUR) - (*p)->offset; (*p)++; } return ret; } static int perf_header__adds_write(struct perf_header *header, struct perf_evlist *evlist, int fd) { int nr_sections; struct feat_fd ff; struct perf_file_section *feat_sec, *p; int sec_size; u64 sec_start; int feat; int err; ff = (struct feat_fd){ .fd = fd, .ph = header, }; nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS); if (!nr_sections) return 0; feat_sec = p = calloc(nr_sections, sizeof(*feat_sec)); if (feat_sec == NULL) return -ENOMEM; sec_size = sizeof(*feat_sec) * nr_sections; sec_start = header->feat_offset; lseek(fd, sec_start + sec_size, SEEK_SET); for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) { if (do_write_feat(&ff, feat, &p, evlist)) perf_header__clear_feat(header, feat); } lseek(fd, sec_start, SEEK_SET); /* * may write more than needed due to dropped feature, but * this is okay, reader will skip the missing entries */ err = do_write(&ff, feat_sec, sec_size); if (err < 0) pr_debug("failed to write feature section\n"); free(feat_sec); return err; } int perf_header__write_pipe(int fd) { struct perf_pipe_file_header f_header; struct feat_fd ff; int err; ff = (struct feat_fd){ .fd = fd }; f_header = (struct perf_pipe_file_header){ .magic = PERF_MAGIC, .size = sizeof(f_header), }; err = do_write(&ff, &f_header, sizeof(f_header)); if (err < 0) { pr_debug("failed to write perf pipe header\n"); return err; } return 0; } int perf_session__write_header(struct perf_session *session, struct perf_evlist *evlist, int fd, bool at_exit) { struct perf_file_header f_header; struct perf_file_attr f_attr; struct perf_header *header = &session->header; struct perf_evsel *evsel; struct feat_fd ff; u64 attr_offset; int err; ff = (struct feat_fd){ .fd = fd}; lseek(fd, sizeof(f_header), SEEK_SET); evlist__for_each_entry(session->evlist, evsel) { evsel->id_offset = lseek(fd, 0, SEEK_CUR); err = do_write(&ff, evsel->id, evsel->ids * sizeof(u64)); if (err < 0) { pr_debug("failed to write perf header\n"); return err; } } attr_offset = lseek(ff.fd, 0, SEEK_CUR); evlist__for_each_entry(evlist, evsel) { f_attr = (struct perf_file_attr){ .attr = evsel->attr, .ids = { .offset = evsel->id_offset, .size = evsel->ids * sizeof(u64), } }; err = do_write(&ff, &f_attr, sizeof(f_attr)); if (err < 0) { pr_debug("failed to write perf header attribute\n"); return err; } } if (!header->data_offset) header->data_offset = lseek(fd, 0, SEEK_CUR); header->feat_offset = header->data_offset + header->data_size; if (at_exit) { err = perf_header__adds_write(header, evlist, fd); if (err < 0) return err; } f_header = (struct perf_file_header){ .magic = PERF_MAGIC, .size = sizeof(f_header), .attr_size = sizeof(f_attr), .attrs = { .offset = attr_offset, .size = evlist->nr_entries * sizeof(f_attr), }, .data = { .offset = header->data_offset, .size = header->data_size, }, /* event_types is ignored, store zeros */ }; memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features)); lseek(fd, 0, SEEK_SET); err = do_write(&ff, &f_header, sizeof(f_header)); if (err < 0) { pr_debug("failed to write perf header\n"); return err; } lseek(fd, header->data_offset + header->data_size, SEEK_SET); return 0; } static int perf_header__getbuffer64(struct perf_header *header, int fd, void *buf, size_t size) { if (readn(fd, buf, size) <= 0) return -1; if (header->needs_swap) mem_bswap_64(buf, size); return 0; } int perf_header__process_sections(struct perf_header *header, int fd, void *data, int (*process)(struct perf_file_section *section, struct perf_header *ph, int feat, int fd, void *data)) { struct perf_file_section *feat_sec, *sec; int nr_sections; int sec_size; int feat; int err; nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS); if (!nr_sections) return 0; feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec)); if (!feat_sec) return -1; sec_size = sizeof(*feat_sec) * nr_sections; lseek(fd, header->feat_offset, SEEK_SET); err = perf_header__getbuffer64(header, fd, feat_sec, sec_size); if (err < 0) goto out_free; for_each_set_bit(feat, header->adds_features, HEADER_LAST_FEATURE) { err = process(sec++, header, feat, fd, data); if (err < 0) goto out_free; } err = 0; out_free: free(feat_sec); return err; } static const int attr_file_abi_sizes[] = { [0] = PERF_ATTR_SIZE_VER0, [1] = PERF_ATTR_SIZE_VER1, [2] = PERF_ATTR_SIZE_VER2, [3] = PERF_ATTR_SIZE_VER3, [4] = PERF_ATTR_SIZE_VER4, 0, }; /* * In the legacy file format, the magic number is not used to encode endianness. * hdr_sz was used to encode endianness. But given that hdr_sz can vary based * on ABI revisions, we need to try all combinations for all endianness to * detect the endianness. */ static int try_all_file_abis(uint64_t hdr_sz, struct perf_header *ph) { uint64_t ref_size, attr_size; int i; for (i = 0 ; attr_file_abi_sizes[i]; i++) { ref_size = attr_file_abi_sizes[i] + sizeof(struct perf_file_section); if (hdr_sz != ref_size) { attr_size = bswap_64(hdr_sz); if (attr_size != ref_size) continue; ph->needs_swap = true; } pr_debug("ABI%d perf.data file detected, need_swap=%d\n", i, ph->needs_swap); return 0; } /* could not determine endianness */ return -1; } #define PERF_PIPE_HDR_VER0 16 static const size_t attr_pipe_abi_sizes[] = { [0] = PERF_PIPE_HDR_VER0, 0, }; /* * In the legacy pipe format, there is an implicit assumption that endiannesss * between host recording the samples, and host parsing the samples is the * same. This is not always the case given that the pipe output may always be * redirected into a file and analyzed on a different machine with possibly a * different endianness and perf_event ABI revsions in the perf tool itself. */ static int try_all_pipe_abis(uint64_t hdr_sz, struct perf_header *ph) { u64 attr_size; int i; for (i = 0 ; attr_pipe_abi_sizes[i]; i++) { if (hdr_sz != attr_pipe_abi_sizes[i]) { attr_size = bswap_64(hdr_sz); if (attr_size != hdr_sz) continue; ph->needs_swap = true; } pr_debug("Pipe ABI%d perf.data file detected\n", i); return 0; } return -1; } bool is_perf_magic(u64 magic) { if (!memcmp(&magic, __perf_magic1, sizeof(magic)) || magic == __perf_magic2 || magic == __perf_magic2_sw) return true; return false; } static int check_magic_endian(u64 magic, uint64_t hdr_sz, bool is_pipe, struct perf_header *ph) { int ret; /* check for legacy format */ ret = memcmp(&magic, __perf_magic1, sizeof(magic)); if (ret == 0) { ph->version = PERF_HEADER_VERSION_1; pr_debug("legacy perf.data format\n"); if (is_pipe) return try_all_pipe_abis(hdr_sz, ph); return try_all_file_abis(hdr_sz, ph); } /* * the new magic number serves two purposes: * - unique number to identify actual perf.data files * - encode endianness of file */ ph->version = PERF_HEADER_VERSION_2; /* check magic number with one endianness */ if (magic == __perf_magic2) return 0; /* check magic number with opposite endianness */ if (magic != __perf_magic2_sw) return -1; ph->needs_swap = true; return 0; } int perf_file_header__read(struct perf_file_header *header, struct perf_header *ph, int fd) { ssize_t ret; lseek(fd, 0, SEEK_SET); ret = readn(fd, header, sizeof(*header)); if (ret <= 0) return -1; if (check_magic_endian(header->magic, header->attr_size, false, ph) < 0) { pr_debug("magic/endian check failed\n"); return -1; } if (ph->needs_swap) { mem_bswap_64(header, offsetof(struct perf_file_header, adds_features)); } if (header->size != sizeof(*header)) { /* Support the previous format */ if (header->size == offsetof(typeof(*header), adds_features)) bitmap_zero(header->adds_features, HEADER_FEAT_BITS); else return -1; } else if (ph->needs_swap) { /* * feature bitmap is declared as an array of unsigned longs -- * not good since its size can differ between the host that * generated the data file and the host analyzing the file. * * We need to handle endianness, but we don't know the size of * the unsigned long where the file was generated. Take a best * guess at determining it: try 64-bit swap first (ie., file * created on a 64-bit host), and check if the hostname feature * bit is set (this feature bit is forced on as of fbe96f2). * If the bit is not, undo the 64-bit swap and try a 32-bit * swap. If the hostname bit is still not set (e.g., older data * file), punt and fallback to the original behavior -- * clearing all feature bits and setting buildid. */ mem_bswap_64(&header->adds_features, BITS_TO_U64(HEADER_FEAT_BITS)); if (!test_bit(HEADER_HOSTNAME, header->adds_features)) { /* unswap as u64 */ mem_bswap_64(&header->adds_features, BITS_TO_U64(HEADER_FEAT_BITS)); /* unswap as u32 */ mem_bswap_32(&header->adds_features, BITS_TO_U32(HEADER_FEAT_BITS)); } if (!test_bit(HEADER_HOSTNAME, header->adds_features)) { bitmap_zero(header->adds_features, HEADER_FEAT_BITS); set_bit(HEADER_BUILD_ID, header->adds_features); } } memcpy(&ph->adds_features, &header->adds_features, sizeof(ph->adds_features)); ph->data_offset = header->data.offset; ph->data_size = header->data.size; ph->feat_offset = header->data.offset + header->data.size; return 0; } static int perf_file_section__process(struct perf_file_section *section, struct perf_header *ph, int feat, int fd, void *data) { struct feat_fd fdd = { .fd = fd, .ph = ph, .size = section->size, .offset = section->offset, }; if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) { pr_debug("Failed to lseek to %" PRIu64 " offset for feature " "%d, continuing...\n", section->offset, feat); return 0; } if (feat >= HEADER_LAST_FEATURE) { pr_debug("unknown feature %d, continuing...\n", feat); return 0; } if (!feat_ops[feat].process) return 0; return feat_ops[feat].process(&fdd, data); } static int perf_file_header__read_pipe(struct perf_pipe_file_header *header, struct perf_header *ph, int fd, bool repipe) { struct feat_fd ff = { .fd = STDOUT_FILENO, .ph = ph, }; ssize_t ret; ret = readn(fd, header, sizeof(*header)); if (ret <= 0) return -1; if (check_magic_endian(header->magic, header->size, true, ph) < 0) { pr_debug("endian/magic failed\n"); return -1; } if (ph->needs_swap) header->size = bswap_64(header->size); if (repipe && do_write(&ff, header, sizeof(*header)) < 0) return -1; return 0; } static int perf_header__read_pipe(struct perf_session *session) { struct perf_header *header = &session->header; struct perf_pipe_file_header f_header; if (perf_file_header__read_pipe(&f_header, header, perf_data__fd(session->data), session->repipe) < 0) { pr_debug("incompatible file format\n"); return -EINVAL; } return 0; } static int read_attr(int fd, struct perf_header *ph, struct perf_file_attr *f_attr) { struct perf_event_attr *attr = &f_attr->attr; size_t sz, left; size_t our_sz = sizeof(f_attr->attr); ssize_t ret; memset(f_attr, 0, sizeof(*f_attr)); /* read minimal guaranteed structure */ ret = readn(fd, attr, PERF_ATTR_SIZE_VER0); if (ret <= 0) { pr_debug("cannot read %d bytes of header attr\n", PERF_ATTR_SIZE_VER0); return -1; } /* on file perf_event_attr size */ sz = attr->size; if (ph->needs_swap) sz = bswap_32(sz); if (sz == 0) { /* assume ABI0 */ sz = PERF_ATTR_SIZE_VER0; } else if (sz > our_sz) { pr_debug("file uses a more recent and unsupported ABI" " (%zu bytes extra)\n", sz - our_sz); return -1; } /* what we have not yet read and that we know about */ left = sz - PERF_ATTR_SIZE_VER0; if (left) { void *ptr = attr; ptr += PERF_ATTR_SIZE_VER0; ret = readn(fd, ptr, left); } /* read perf_file_section, ids are read in caller */ ret = readn(fd, &f_attr->ids, sizeof(f_attr->ids)); return ret <= 0 ? -1 : 0; } static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel, struct tep_handle *pevent) { struct tep_event *event; char bf[128]; /* already prepared */ if (evsel->tp_format) return 0; if (pevent == NULL) { pr_debug("broken or missing trace data\n"); return -1; } event = tep_find_event(pevent, evsel->attr.config); if (event == NULL) { pr_debug("cannot find event format for %d\n", (int)evsel->attr.config); return -1; } if (!evsel->name) { snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name); evsel->name = strdup(bf); if (evsel->name == NULL) return -1; } evsel->tp_format = event; return 0; } static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist, struct tep_handle *pevent) { struct perf_evsel *pos; evlist__for_each_entry(evlist, pos) { if (pos->attr.type == PERF_TYPE_TRACEPOINT && perf_evsel__prepare_tracepoint_event(pos, pevent)) return -1; } return 0; } int perf_session__read_header(struct perf_session *session) { struct perf_data *data = session->data; struct perf_header *header = &session->header; struct perf_file_header f_header; struct perf_file_attr f_attr; u64 f_id; int nr_attrs, nr_ids, i, j; int fd = perf_data__fd(data); session->evlist = perf_evlist__new(); if (session->evlist == NULL) return -ENOMEM; session->evlist->env = &header->env; session->machines.host.env = &header->env; if (perf_data__is_pipe(data)) return perf_header__read_pipe(session); if (perf_file_header__read(&f_header, header, fd) < 0) return -EINVAL; /* * Sanity check that perf.data was written cleanly; data size is * initialized to 0 and updated only if the on_exit function is run. * If data size is still 0 then the file contains only partial * information. Just warn user and process it as much as it can. */ if (f_header.data.size == 0) { pr_warning("WARNING: The %s file's data size field is 0 which is unexpected.\n" "Was the 'perf record' command properly terminated?\n", data->file.path); } nr_attrs = f_header.attrs.size / f_header.attr_size; lseek(fd, f_header.attrs.offset, SEEK_SET); for (i = 0; i < nr_attrs; i++) { struct perf_evsel *evsel; off_t tmp; if (read_attr(fd, header, &f_attr) < 0) goto out_errno; if (header->needs_swap) { f_attr.ids.size = bswap_64(f_attr.ids.size); f_attr.ids.offset = bswap_64(f_attr.ids.offset); perf_event__attr_swap(&f_attr.attr); } tmp = lseek(fd, 0, SEEK_CUR); evsel = perf_evsel__new(&f_attr.attr); if (evsel == NULL) goto out_delete_evlist; evsel->needs_swap = header->needs_swap; /* * Do it before so that if perf_evsel__alloc_id fails, this * entry gets purged too at perf_evlist__delete(). */ perf_evlist__add(session->evlist, evsel); nr_ids = f_attr.ids.size / sizeof(u64); /* * We don't have the cpu and thread maps on the header, so * for allocating the perf_sample_id table we fake 1 cpu and * hattr->ids threads. */ if (perf_evsel__alloc_id(evsel, 1, nr_ids)) goto out_delete_evlist; lseek(fd, f_attr.ids.offset, SEEK_SET); for (j = 0; j < nr_ids; j++) { if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id))) goto out_errno; perf_evlist__id_add(session->evlist, evsel, 0, j, f_id); } lseek(fd, tmp, SEEK_SET); } perf_header__process_sections(header, fd, &session->tevent, perf_file_section__process); if (perf_evlist__prepare_tracepoint_events(session->evlist, session->tevent.pevent)) goto out_delete_evlist; return 0; out_errno: return -errno; out_delete_evlist: perf_evlist__delete(session->evlist); session->evlist = NULL; return -ENOMEM; } int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr, u32 ids, u64 *id, perf_event__handler_t process) { union perf_event *ev; size_t size; int err; size = sizeof(struct perf_event_attr); size = PERF_ALIGN(size, sizeof(u64)); size += sizeof(struct perf_event_header); size += ids * sizeof(u64); ev = malloc(size); if (ev == NULL) return -ENOMEM; ev->attr.attr = *attr; memcpy(ev->attr.id, id, ids * sizeof(u64)); ev->attr.header.type = PERF_RECORD_HEADER_ATTR; ev->attr.header.size = (u16)size; if (ev->attr.header.size == size) err = process(tool, ev, NULL, NULL); else err = -E2BIG; free(ev); return err; } int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session, struct perf_evlist *evlist, perf_event__handler_t process) { struct perf_header *header = &session->header; struct feat_fd ff; struct feature_event *fe; size_t sz, sz_hdr; int feat, ret; sz_hdr = sizeof(fe->header); sz = sizeof(union perf_event); /* get a nice alignment */ sz = PERF_ALIGN(sz, page_size); memset(&ff, 0, sizeof(ff)); ff.buf = malloc(sz); if (!ff.buf) return -ENOMEM; ff.size = sz - sz_hdr; for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) { if (!feat_ops[feat].synthesize) { pr_debug("No record header feature for header :%d\n", feat); continue; } ff.offset = sizeof(*fe); ret = feat_ops[feat].write(&ff, evlist); if (ret || ff.offset <= (ssize_t)sizeof(*fe)) { pr_debug("Error writing feature\n"); continue; } /* ff.buf may have changed due to realloc in do_write() */ fe = ff.buf; memset(fe, 0, sizeof(*fe)); fe->feat_id = feat; fe->header.type = PERF_RECORD_HEADER_FEATURE; fe->header.size = ff.offset; ret = process(tool, ff.buf, NULL, NULL); if (ret) { free(ff.buf); return ret; } } /* Send HEADER_LAST_FEATURE mark. */ fe = ff.buf; fe->feat_id = HEADER_LAST_FEATURE; fe->header.type = PERF_RECORD_HEADER_FEATURE; fe->header.size = sizeof(*fe); ret = process(tool, ff.buf, NULL, NULL); free(ff.buf); return ret; } int perf_event__process_feature(struct perf_session *session, union perf_event *event) { struct perf_tool *tool = session->tool; struct feat_fd ff = { .fd = 0 }; struct feature_event *fe = (struct feature_event *)event; int type = fe->header.type; u64 feat = fe->feat_id; if (type < 0 || type >= PERF_RECORD_HEADER_MAX) { pr_warning("invalid record type %d in pipe-mode\n", type); return 0; } if (feat == HEADER_RESERVED || feat >= HEADER_LAST_FEATURE) { pr_warning("invalid record type %d in pipe-mode\n", type); return -1; } if (!feat_ops[feat].process) return 0; ff.buf = (void *)fe->data; ff.size = event->header.size - sizeof(event->header); ff.ph = &session->header; if (feat_ops[feat].process(&ff, NULL)) return -1; if (!feat_ops[feat].print || !tool->show_feat_hdr) return 0; if (!feat_ops[feat].full_only || tool->show_feat_hdr >= SHOW_FEAT_HEADER_FULL_INFO) { feat_ops[feat].print(&ff, stdout); } else { fprintf(stdout, "# %s info available, use -I to display\n", feat_ops[feat].name); } return 0; } static struct event_update_event * event_update_event__new(size_t size, u64 type, u64 id) { struct event_update_event *ev; size += sizeof(*ev); size = PERF_ALIGN(size, sizeof(u64)); ev = zalloc(size); if (ev) { ev->header.type = PERF_RECORD_EVENT_UPDATE; ev->header.size = (u16)size; ev->type = type; ev->id = id; } return ev; } int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process) { struct event_update_event *ev; size_t size = strlen(evsel->unit); int err; ev = event_update_event__new(size + 1, PERF_EVENT_UPDATE__UNIT, evsel->id[0]); if (ev == NULL) return -ENOMEM; strlcpy(ev->data, evsel->unit, size + 1); err = process(tool, (union perf_event *)ev, NULL, NULL); free(ev); return err; } int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process) { struct event_update_event *ev; struct event_update_event_scale *ev_data; int err; ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]); if (ev == NULL) return -ENOMEM; ev_data = (struct event_update_event_scale *) ev->data; ev_data->scale = evsel->scale; err = process(tool, (union perf_event*) ev, NULL, NULL); free(ev); return err; } int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process) { struct event_update_event *ev; size_t len = strlen(evsel->name); int err; ev = event_update_event__new(len + 1, PERF_EVENT_UPDATE__NAME, evsel->id[0]); if (ev == NULL) return -ENOMEM; strlcpy(ev->data, evsel->name, len + 1); err = process(tool, (union perf_event*) ev, NULL, NULL); free(ev); return err; } int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct perf_evsel *evsel, perf_event__handler_t process) { size_t size = sizeof(struct event_update_event); struct event_update_event *ev; int max, err; u16 type; if (!evsel->own_cpus) return 0; ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max); if (!ev) return -ENOMEM; ev->header.type = PERF_RECORD_EVENT_UPDATE; ev->header.size = (u16)size; ev->type = PERF_EVENT_UPDATE__CPUS; ev->id = evsel->id[0]; cpu_map_data__synthesize((struct cpu_map_data *) ev->data, evsel->own_cpus, type, max); err = process(tool, (union perf_event*) ev, NULL, NULL); free(ev); return err; } size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp) { struct event_update_event *ev = &event->event_update; struct event_update_event_scale *ev_scale; struct event_update_event_cpus *ev_cpus; struct cpu_map *map; size_t ret; ret = fprintf(fp, "\n... id: %" PRIu64 "\n", ev->id); switch (ev->type) { case PERF_EVENT_UPDATE__SCALE: ev_scale = (struct event_update_event_scale *) ev->data; ret += fprintf(fp, "... scale: %f\n", ev_scale->scale); break; case PERF_EVENT_UPDATE__UNIT: ret += fprintf(fp, "... unit: %s\n", ev->data); break; case PERF_EVENT_UPDATE__NAME: ret += fprintf(fp, "... name: %s\n", ev->data); break; case PERF_EVENT_UPDATE__CPUS: ev_cpus = (struct event_update_event_cpus *) ev->data; ret += fprintf(fp, "... "); map = cpu_map__new_data(&ev_cpus->cpus); if (map) ret += cpu_map__fprintf(map, fp); else ret += fprintf(fp, "failed to get cpus\n"); break; default: ret += fprintf(fp, "... unknown type\n"); break; } return ret; } int perf_event__synthesize_attrs(struct perf_tool *tool, struct perf_evlist *evlist, perf_event__handler_t process) { struct perf_evsel *evsel; int err = 0; evlist__for_each_entry(evlist, evsel) { err = perf_event__synthesize_attr(tool, &evsel->attr, evsel->ids, evsel->id, process); if (err) { pr_debug("failed to create perf header attribute\n"); return err; } } return err; } static bool has_unit(struct perf_evsel *counter) { return counter->unit && *counter->unit; } static bool has_scale(struct perf_evsel *counter) { return counter->scale != 1; } int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct perf_evlist *evsel_list, perf_event__handler_t process, bool is_pipe) { struct perf_evsel *counter; int err; /* * Synthesize other events stuff not carried within * attr event - unit, scale, name */ evlist__for_each_entry(evsel_list, counter) { if (!counter->supported) continue; /* * Synthesize unit and scale only if it's defined. */ if (has_unit(counter)) { err = perf_event__synthesize_event_update_unit(tool, counter, process); if (err < 0) { pr_err("Couldn't synthesize evsel unit.\n"); return err; } } if (has_scale(counter)) { err = perf_event__synthesize_event_update_scale(tool, counter, process); if (err < 0) { pr_err("Couldn't synthesize evsel counter.\n"); return err; } } if (counter->own_cpus) { err = perf_event__synthesize_event_update_cpus(tool, counter, process); if (err < 0) { pr_err("Couldn't synthesize evsel cpus.\n"); return err; } } /* * Name is needed only for pipe output, * perf.data carries event names. */ if (is_pipe) { err = perf_event__synthesize_event_update_name(tool, counter, process); if (err < 0) { pr_err("Couldn't synthesize evsel name.\n"); return err; } } } return 0; } int perf_event__process_attr(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_evlist **pevlist) { u32 i, ids, n_ids; struct perf_evsel *evsel; struct perf_evlist *evlist = *pevlist; if (evlist == NULL) { *pevlist = evlist = perf_evlist__new(); if (evlist == NULL) return -ENOMEM; } evsel = perf_evsel__new(&event->attr.attr); if (evsel == NULL) return -ENOMEM; perf_evlist__add(evlist, evsel); ids = event->header.size; ids -= (void *)&event->attr.id - (void *)event; n_ids = ids / sizeof(u64); /* * We don't have the cpu and thread maps on the header, so * for allocating the perf_sample_id table we fake 1 cpu and * hattr->ids threads. */ if (perf_evsel__alloc_id(evsel, 1, n_ids)) return -ENOMEM; for (i = 0; i < n_ids; i++) { perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]); } return 0; } int perf_event__process_event_update(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_evlist **pevlist) { struct event_update_event *ev = &event->event_update; struct event_update_event_scale *ev_scale; struct event_update_event_cpus *ev_cpus; struct perf_evlist *evlist; struct perf_evsel *evsel; struct cpu_map *map; if (!pevlist || *pevlist == NULL) return -EINVAL; evlist = *pevlist; evsel = perf_evlist__id2evsel(evlist, ev->id); if (evsel == NULL) return -EINVAL; switch (ev->type) { case PERF_EVENT_UPDATE__UNIT: evsel->unit = strdup(ev->data); break; case PERF_EVENT_UPDATE__NAME: evsel->name = strdup(ev->data); break; case PERF_EVENT_UPDATE__SCALE: ev_scale = (struct event_update_event_scale *) ev->data; evsel->scale = ev_scale->scale; break; case PERF_EVENT_UPDATE__CPUS: ev_cpus = (struct event_update_event_cpus *) ev->data; map = cpu_map__new_data(&ev_cpus->cpus); if (map) evsel->own_cpus = map; else pr_err("failed to get event_update cpus\n"); default: break; } return 0; } int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct perf_evlist *evlist, perf_event__handler_t process) { union perf_event ev; struct tracing_data *tdata; ssize_t size = 0, aligned_size = 0, padding; struct feat_fd ff; int err __maybe_unused = 0; /* * We are going to store the size of the data followed * by the data contents. Since the fd descriptor is a pipe, * we cannot seek back to store the size of the data once * we know it. Instead we: * * - write the tracing data to the temp file * - get/write the data size to pipe * - write the tracing data from the temp file * to the pipe */ tdata = tracing_data_get(&evlist->entries, fd, true); if (!tdata) return -1; memset(&ev, 0, sizeof(ev)); ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA; size = tdata->size; aligned_size = PERF_ALIGN(size, sizeof(u64)); padding = aligned_size - size; ev.tracing_data.header.size = sizeof(ev.tracing_data); ev.tracing_data.size = aligned_size; process(tool, &ev, NULL, NULL); /* * The put function will copy all the tracing data * stored in temp file to the pipe. */ tracing_data_put(tdata); ff = (struct feat_fd){ .fd = fd }; if (write_padded(&ff, NULL, 0, padding)) return -1; return aligned_size; } int perf_event__process_tracing_data(struct perf_session *session, union perf_event *event) { ssize_t size_read, padding, size = event->tracing_data.size; int fd = perf_data__fd(session->data); off_t offset = lseek(fd, 0, SEEK_CUR); char buf[BUFSIZ]; /* setup for reading amidst mmap */ lseek(fd, offset + sizeof(struct tracing_data_event), SEEK_SET); size_read = trace_report(fd, &session->tevent, session->repipe); padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read; if (readn(fd, buf, padding) < 0) { pr_err("%s: reading input file", __func__); return -1; } if (session->repipe) { int retw = write(STDOUT_FILENO, buf, padding); if (retw <= 0 || retw != padding) { pr_err("%s: repiping tracing data padding", __func__); return -1; } } if (size_read + padding != size) { pr_err("%s: tracing data size mismatch", __func__); return -1; } perf_evlist__prepare_tracepoint_events(session->evlist, session->tevent.pevent); return size_read + padding; } int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc, perf_event__handler_t process, struct machine *machine) { union perf_event ev; size_t len; int err = 0; if (!pos->hit) return err; memset(&ev, 0, sizeof(ev)); len = pos->long_name_len + 1; len = PERF_ALIGN(len, NAME_ALIGN); memcpy(&ev.build_id.build_id, pos->build_id, sizeof(pos->build_id)); ev.build_id.header.type = PERF_RECORD_HEADER_BUILD_ID; ev.build_id.header.misc = misc; ev.build_id.pid = machine->pid; ev.build_id.header.size = sizeof(ev.build_id) + len; memcpy(&ev.build_id.filename, pos->long_name, pos->long_name_len); err = process(tool, &ev, NULL, machine); return err; } int perf_event__process_build_id(struct perf_session *session, union perf_event *event) { __event_process_build_id(&event->build_id, event->build_id.filename, session); return 0; }
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