| #include "util.h" |
| #include <sys/types.h> |
| #include <byteswap.h> |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <linux/list.h> |
| #include <linux/kernel.h> |
| #include <linux/bitops.h> |
| #include <sys/utsname.h> |
| |
| #include "evlist.h" |
| #include "evsel.h" |
| #include "header.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" |
| |
| static bool no_buildid_cache = false; |
| |
| static u32 header_argc; |
| static const char **header_argv; |
| |
| /* |
| * 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 |
| |
| struct perf_file_attr { |
| struct perf_event_attr attr; |
| struct perf_file_section ids; |
| }; |
| |
| 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(int fd, const void *buf, size_t size) |
| { |
| while (size) { |
| int ret = write(fd, buf, size); |
| |
| if (ret < 0) |
| return -errno; |
| |
| size -= ret; |
| buf += ret; |
| } |
| |
| return 0; |
| } |
| |
| #define NAME_ALIGN 64 |
| |
| static int write_padded(int fd, const void *bf, size_t count, |
| size_t count_aligned) |
| { |
| static const char zero_buf[NAME_ALIGN]; |
| int err = do_write(fd, bf, count); |
| |
| if (!err) |
| err = do_write(fd, zero_buf, count_aligned - count); |
| |
| return err; |
| } |
| |
| static int do_write_string(int fd, 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(fd, &len, sizeof(len)); |
| if (ret < 0) |
| return ret; |
| |
| return write_padded(fd, str, olen, len); |
| } |
| |
| static char *do_read_string(int fd, struct perf_header *ph) |
| { |
| ssize_t sz, ret; |
| u32 len; |
| char *buf; |
| |
| sz = readn(fd, &len, sizeof(len)); |
| if (sz < (ssize_t)sizeof(len)) |
| return NULL; |
| |
| if (ph->needs_swap) |
| len = bswap_32(len); |
| |
| buf = malloc(len); |
| if (!buf) |
| return NULL; |
| |
| ret = readn(fd, buf, len); |
| if (ret == (ssize_t)len) { |
| /* |
| * strings are padded by zeroes |
| * thus the actual strlen of buf |
| * may be less than len |
| */ |
| return buf; |
| } |
| |
| free(buf); |
| return NULL; |
| } |
| |
| int |
| perf_header__set_cmdline(int argc, const char **argv) |
| { |
| int i; |
| |
| /* |
| * If header_argv has already been set, do not override it. |
| * This allows a command to set the cmdline, parse args and |
| * then call another builtin function that implements a |
| * command -- e.g, cmd_kvm calling cmd_record. |
| */ |
| if (header_argv) |
| return 0; |
| |
| header_argc = (u32)argc; |
| |
| /* do not include NULL termination */ |
| header_argv = calloc(argc, sizeof(char *)); |
| if (!header_argv) |
| return -ENOMEM; |
| |
| /* |
| * must copy argv contents because it gets moved |
| * around during option parsing |
| */ |
| for (i = 0; i < argc ; i++) |
| header_argv[i] = argv[i]; |
| |
| return 0; |
| } |
| |
| #define dsos__for_each_with_build_id(pos, head) \ |
| list_for_each_entry(pos, head, node) \ |
| if (!pos->has_build_id) \ |
| continue; \ |
| else |
| |
| static int write_buildid(const char *name, size_t name_len, u8 *build_id, |
| pid_t pid, u16 misc, int fd) |
| { |
| int err; |
| struct build_id_event b; |
| size_t len; |
| |
| len = name_len + 1; |
| len = PERF_ALIGN(len, NAME_ALIGN); |
| |
| memset(&b, 0, sizeof(b)); |
| memcpy(&b.build_id, build_id, BUILD_ID_SIZE); |
| b.pid = pid; |
| b.header.misc = misc; |
| b.header.size = sizeof(b) + len; |
| |
| err = do_write(fd, &b, sizeof(b)); |
| if (err < 0) |
| return err; |
| |
| return write_padded(fd, name, name_len + 1, len); |
| } |
| |
| static int __dsos__hit_all(struct list_head *head) |
| { |
| struct dso *pos; |
| |
| list_for_each_entry(pos, head, node) |
| pos->hit = true; |
| |
| return 0; |
| } |
| |
| static int machine__hit_all_dsos(struct machine *machine) |
| { |
| int err; |
| |
| err = __dsos__hit_all(&machine->kernel_dsos.head); |
| if (err) |
| return err; |
| |
| return __dsos__hit_all(&machine->user_dsos.head); |
| } |
| |
| int dsos__hit_all(struct perf_session *session) |
| { |
| struct rb_node *nd; |
| int err; |
| |
| err = machine__hit_all_dsos(&session->machines.host); |
| if (err) |
| return err; |
| |
| for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) { |
| struct machine *pos = rb_entry(nd, struct machine, rb_node); |
| |
| err = machine__hit_all_dsos(pos); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int __dsos__write_buildid_table(struct list_head *head, |
| struct machine *machine, |
| pid_t pid, u16 misc, int fd) |
| { |
| char nm[PATH_MAX]; |
| struct dso *pos; |
| |
| dsos__for_each_with_build_id(pos, head) { |
| int err; |
| const char *name; |
| size_t name_len; |
| |
| if (!pos->hit) |
| continue; |
| |
| if (dso__is_vdso(pos)) { |
| name = pos->short_name; |
| name_len = pos->short_name_len + 1; |
| } else if (dso__is_kcore(pos)) { |
| machine__mmap_name(machine, nm, sizeof(nm)); |
| name = nm; |
| name_len = strlen(nm) + 1; |
| } else { |
| name = pos->long_name; |
| name_len = pos->long_name_len + 1; |
| } |
| |
| err = write_buildid(name, name_len, pos->build_id, |
| pid, misc, fd); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int machine__write_buildid_table(struct machine *machine, int fd) |
| { |
| int err; |
| u16 kmisc = PERF_RECORD_MISC_KERNEL, |
| umisc = PERF_RECORD_MISC_USER; |
| |
| if (!machine__is_host(machine)) { |
| kmisc = PERF_RECORD_MISC_GUEST_KERNEL; |
| umisc = PERF_RECORD_MISC_GUEST_USER; |
| } |
| |
| err = __dsos__write_buildid_table(&machine->kernel_dsos.head, machine, |
| machine->pid, kmisc, fd); |
| if (err == 0) |
| err = __dsos__write_buildid_table(&machine->user_dsos.head, |
| machine, machine->pid, umisc, |
| fd); |
| return err; |
| } |
| |
| static int perf_session__write_buildid_table(struct perf_session *session, int fd) |
| { |
| struct rb_node *nd; |
| int err = machine__write_buildid_table(&session->machines.host, fd); |
| |
| if (err) |
| return err; |
| |
| for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) { |
| struct machine *pos = rb_entry(nd, struct machine, rb_node); |
| err = machine__write_buildid_table(pos, fd); |
| if (err) |
| break; |
| } |
| return err; |
| } |
| |
| int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, |
| const char *name, bool is_kallsyms, bool is_vdso) |
| { |
| const size_t size = PATH_MAX; |
| char *realname, *filename = zalloc(size), |
| *linkname = zalloc(size), *targetname; |
| int len, err = -1; |
| bool slash = is_kallsyms || is_vdso; |
| |
| if (is_kallsyms) { |
| if (symbol_conf.kptr_restrict) { |
| pr_debug("Not caching a kptr_restrict'ed /proc/kallsyms\n"); |
| err = 0; |
| goto out_free; |
| } |
| realname = (char *) name; |
| } else |
| realname = realpath(name, NULL); |
| |
| if (realname == NULL || filename == NULL || linkname == NULL) |
| goto out_free; |
| |
| len = scnprintf(filename, size, "%s%s%s", |
| debugdir, slash ? "/" : "", |
| is_vdso ? DSO__NAME_VDSO : realname); |
| if (mkdir_p(filename, 0755)) |
| goto out_free; |
| |
| snprintf(filename + len, size - len, "/%s", sbuild_id); |
| |
| if (access(filename, F_OK)) { |
| if (is_kallsyms) { |
| if (copyfile("/proc/kallsyms", filename)) |
| goto out_free; |
| } else if (link(realname, filename) && copyfile(name, filename)) |
| goto out_free; |
| } |
| |
| len = scnprintf(linkname, size, "%s/.build-id/%.2s", |
| debugdir, sbuild_id); |
| |
| if (access(linkname, X_OK) && mkdir_p(linkname, 0755)) |
| goto out_free; |
| |
| snprintf(linkname + len, size - len, "/%s", sbuild_id + 2); |
| targetname = filename + strlen(debugdir) - 5; |
| memcpy(targetname, "../..", 5); |
| |
| if (symlink(targetname, linkname) == 0) |
| err = 0; |
| out_free: |
| if (!is_kallsyms) |
| free(realname); |
| free(filename); |
| free(linkname); |
| return err; |
| } |
| |
| static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size, |
| const char *name, const char *debugdir, |
| bool is_kallsyms, bool is_vdso) |
| { |
| char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
| |
| build_id__sprintf(build_id, build_id_size, sbuild_id); |
| |
| return build_id_cache__add_s(sbuild_id, debugdir, name, |
| is_kallsyms, is_vdso); |
| } |
| |
| int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir) |
| { |
| const size_t size = PATH_MAX; |
| char *filename = zalloc(size), |
| *linkname = zalloc(size); |
| int err = -1; |
| |
| if (filename == NULL || linkname == NULL) |
| goto out_free; |
| |
| snprintf(linkname, size, "%s/.build-id/%.2s/%s", |
| debugdir, sbuild_id, sbuild_id + 2); |
| |
| if (access(linkname, F_OK)) |
| goto out_free; |
| |
| if (readlink(linkname, filename, size - 1) < 0) |
| goto out_free; |
| |
| if (unlink(linkname)) |
| goto out_free; |
| |
| /* |
| * Since the link is relative, we must make it absolute: |
| */ |
| snprintf(linkname, size, "%s/.build-id/%.2s/%s", |
| debugdir, sbuild_id, filename); |
| |
| if (unlink(linkname)) |
| goto out_free; |
| |
| err = 0; |
| out_free: |
| free(filename); |
| free(linkname); |
| return err; |
| } |
| |
| static int dso__cache_build_id(struct dso *dso, struct machine *machine, |
| const char *debugdir) |
| { |
| bool is_kallsyms = dso->kernel && dso->long_name[0] != '/'; |
| bool is_vdso = dso__is_vdso(dso); |
| const char *name = dso->long_name; |
| char nm[PATH_MAX]; |
| |
| if (dso__is_kcore(dso)) { |
| is_kallsyms = true; |
| machine__mmap_name(machine, nm, sizeof(nm)); |
| name = nm; |
| } |
| return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id), name, |
| debugdir, is_kallsyms, is_vdso); |
| } |
| |
| static int __dsos__cache_build_ids(struct list_head *head, |
| struct machine *machine, const char *debugdir) |
| { |
| struct dso *pos; |
| int err = 0; |
| |
| dsos__for_each_with_build_id(pos, head) |
| if (dso__cache_build_id(pos, machine, debugdir)) |
| err = -1; |
| |
| return err; |
| } |
| |
| static int machine__cache_build_ids(struct machine *machine, const char *debugdir) |
| { |
| int ret = __dsos__cache_build_ids(&machine->kernel_dsos.head, machine, |
| debugdir); |
| ret |= __dsos__cache_build_ids(&machine->user_dsos.head, machine, |
| debugdir); |
| return ret; |
| } |
| |
| static int perf_session__cache_build_ids(struct perf_session *session) |
| { |
| struct rb_node *nd; |
| int ret; |
| char debugdir[PATH_MAX]; |
| |
| snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir); |
| |
| if (mkdir(debugdir, 0755) != 0 && errno != EEXIST) |
| return -1; |
| |
| ret = machine__cache_build_ids(&session->machines.host, debugdir); |
| |
| for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) { |
| struct machine *pos = rb_entry(nd, struct machine, rb_node); |
| ret |= machine__cache_build_ids(pos, debugdir); |
| } |
| return ret ? -1 : 0; |
| } |
| |
| static bool machine__read_build_ids(struct machine *machine, bool with_hits) |
| { |
| bool ret; |
| |
| ret = __dsos__read_build_ids(&machine->kernel_dsos.head, with_hits); |
| ret |= __dsos__read_build_ids(&machine->user_dsos.head, with_hits); |
| return ret; |
| } |
| |
| static bool perf_session__read_build_ids(struct perf_session *session, bool with_hits) |
| { |
| struct rb_node *nd; |
| bool ret = machine__read_build_ids(&session->machines.host, with_hits); |
| |
| for (nd = rb_first(&session->machines.guests); nd; nd = rb_next(nd)) { |
| struct machine *pos = rb_entry(nd, struct machine, rb_node); |
| ret |= machine__read_build_ids(pos, with_hits); |
| } |
| |
| return ret; |
| } |
| |
| static int write_tracing_data(int fd, struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist) |
| { |
| return read_tracing_data(fd, &evlist->entries); |
| } |
| |
| |
| static int write_build_id(int fd, struct perf_header *h, |
| struct perf_evlist *evlist __maybe_unused) |
| { |
| struct perf_session *session; |
| int err; |
| |
| session = container_of(h, struct perf_session, header); |
| |
| if (!perf_session__read_build_ids(session, true)) |
| return -1; |
| |
| err = perf_session__write_buildid_table(session, fd); |
| if (err < 0) { |
| pr_debug("failed to write buildid table\n"); |
| return err; |
| } |
| if (!no_buildid_cache) |
| perf_session__cache_build_ids(session); |
| |
| return 0; |
| } |
| |
| static int write_hostname(int fd, struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist __maybe_unused) |
| { |
| struct utsname uts; |
| int ret; |
| |
| ret = uname(&uts); |
| if (ret < 0) |
| return -1; |
| |
| return do_write_string(fd, uts.nodename); |
| } |
| |
| static int write_osrelease(int fd, struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist __maybe_unused) |
| { |
| struct utsname uts; |
| int ret; |
| |
| ret = uname(&uts); |
| if (ret < 0) |
| return -1; |
| |
| return do_write_string(fd, uts.release); |
| } |
| |
| static int write_arch(int fd, struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist __maybe_unused) |
| { |
| struct utsname uts; |
| int ret; |
| |
| ret = uname(&uts); |
| if (ret < 0) |
| return -1; |
| |
| return do_write_string(fd, uts.machine); |
| } |
| |
| static int write_version(int fd, struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist __maybe_unused) |
| { |
| return do_write_string(fd, perf_version_string); |
| } |
| |
| static int __write_cpudesc(int fd, 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(fd, s); |
| done: |
| free(buf); |
| fclose(file); |
| return ret; |
| } |
| |
| static int write_cpudesc(int fd, struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist __maybe_unused) |
| { |
| #ifndef CPUINFO_PROC |
| #define CPUINFO_PROC {"model name", } |
| #endif |
| const char *cpuinfo_procs[] = CPUINFO_PROC; |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(cpuinfo_procs); i++) { |
| int ret; |
| ret = __write_cpudesc(fd, cpuinfo_procs[i]); |
| if (ret >= 0) |
| return ret; |
| } |
| return -1; |
| } |
| |
| |
| static int write_nrcpus(int fd, struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist __maybe_unused) |
| { |
| long nr; |
| u32 nrc, nra; |
| int ret; |
| |
| nr = sysconf(_SC_NPROCESSORS_CONF); |
| if (nr < 0) |
| return -1; |
| |
| nrc = (u32)(nr & UINT_MAX); |
| |
| nr = sysconf(_SC_NPROCESSORS_ONLN); |
| if (nr < 0) |
| return -1; |
| |
| nra = (u32)(nr & UINT_MAX); |
| |
| ret = do_write(fd, &nrc, sizeof(nrc)); |
| if (ret < 0) |
| return ret; |
| |
| return do_write(fd, &nra, sizeof(nra)); |
| } |
| |
| static int write_event_desc(int fd, struct perf_header *h __maybe_unused, |
| 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(fd, &nre, sizeof(nre)); |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * size of perf_event_attr struct |
| */ |
| sz = (u32)sizeof(evsel->attr); |
| ret = do_write(fd, &sz, sizeof(sz)); |
| if (ret < 0) |
| return ret; |
| |
| evlist__for_each(evlist, evsel) { |
| ret = do_write(fd, &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(fd, &nri, sizeof(nri)); |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * write event string as passed on cmdline |
| */ |
| ret = do_write_string(fd, perf_evsel__name(evsel)); |
| if (ret < 0) |
| return ret; |
| /* |
| * write unique ids for this event |
| */ |
| ret = do_write(fd, evsel->id, evsel->ids * sizeof(u64)); |
| if (ret < 0) |
| return ret; |
| } |
| return 0; |
| } |
| |
| static int write_cmdline(int fd, struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist __maybe_unused) |
| { |
| char buf[MAXPATHLEN]; |
| char proc[32]; |
| u32 i, n; |
| int ret; |
| |
| /* |
| * actual atual path to perf binary |
| */ |
| sprintf(proc, "/proc/%d/exe", getpid()); |
| ret = readlink(proc, buf, sizeof(buf)); |
| if (ret <= 0) |
| return -1; |
| |
| /* readlink() does not add null termination */ |
| buf[ret] = '\0'; |
| |
| /* account for binary path */ |
| n = header_argc + 1; |
| |
| ret = do_write(fd, &n, sizeof(n)); |
| if (ret < 0) |
| return ret; |
| |
| ret = do_write_string(fd, buf); |
| if (ret < 0) |
| return ret; |
| |
| for (i = 0 ; i < header_argc; i++) { |
| ret = do_write_string(fd, header_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 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; |
| void *addr; |
| u32 nr, i; |
| size_t sz; |
| long ncpus; |
| int ret = -1; |
| |
| ncpus = sysconf(_SC_NPROCESSORS_CONF); |
| if (ncpus < 0) |
| return NULL; |
| |
| nr = (u32)(ncpus & UINT_MAX); |
| |
| sz = nr * sizeof(char *); |
| |
| addr = calloc(1, sizeof(*tp) + 2 * sz); |
| if (!addr) |
| return NULL; |
| |
| tp = addr; |
| |
| addr += sizeof(*tp); |
| tp->core_siblings = addr; |
| addr += sz; |
| tp->thread_siblings = addr; |
| |
| for (i = 0; i < nr; i++) { |
| ret = build_cpu_topo(tp, i); |
| if (ret < 0) |
| break; |
| } |
| if (ret) { |
| free_cpu_topo(tp); |
| tp = NULL; |
| } |
| return tp; |
| } |
| |
| static int write_cpu_topology(int fd, struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist __maybe_unused) |
| { |
| struct cpu_topo *tp; |
| u32 i; |
| int ret; |
| |
| tp = build_cpu_topology(); |
| if (!tp) |
| return -1; |
| |
| ret = do_write(fd, &tp->core_sib, sizeof(tp->core_sib)); |
| if (ret < 0) |
| goto done; |
| |
| for (i = 0; i < tp->core_sib; i++) { |
| ret = do_write_string(fd, tp->core_siblings[i]); |
| if (ret < 0) |
| goto done; |
| } |
| ret = do_write(fd, &tp->thread_sib, sizeof(tp->thread_sib)); |
| if (ret < 0) |
| goto done; |
| |
| for (i = 0; i < tp->thread_sib; i++) { |
| ret = do_write_string(fd, tp->thread_siblings[i]); |
| if (ret < 0) |
| break; |
| } |
| done: |
| free_cpu_topo(tp); |
| return ret; |
| } |
| |
| |
| |
| static int write_total_mem(int fd, struct perf_header *h __maybe_unused, |
| 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(fd, &mem, sizeof(mem)); |
| } else |
| ret = -1; |
| free(buf); |
| fclose(fp); |
| return ret; |
| } |
| |
| static int write_topo_node(int fd, 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(fd, &mem_total, sizeof(u64)); |
| if (ret) |
| goto done; |
| |
| ret = do_write(fd, &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(fd, buf); |
| done: |
| free(buf); |
| if (fp) |
| fclose(fp); |
| return ret; |
| } |
| |
| static int write_numa_topology(int fd, struct perf_header *h __maybe_unused, |
| 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(fd, &nr, sizeof(nr)); |
| if (ret < 0) |
| goto done; |
| |
| for (i = 0; i < nr; i++) { |
| j = (u32)node_map->map[i]; |
| ret = do_write(fd, &j, sizeof(j)); |
| if (ret < 0) |
| break; |
| |
| ret = write_topo_node(fd, i); |
| if (ret < 0) |
| break; |
| } |
| done: |
| free(buf); |
| fclose(fp); |
| free(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(int fd, struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist __maybe_unused) |
| { |
| struct perf_pmu *pmu = NULL; |
| off_t offset = lseek(fd, 0, SEEK_CUR); |
| __u32 pmu_num = 0; |
| int ret; |
| |
| /* write real pmu_num later */ |
| ret = do_write(fd, &pmu_num, sizeof(pmu_num)); |
| if (ret < 0) |
| return ret; |
| |
| while ((pmu = perf_pmu__scan(pmu))) { |
| if (!pmu->name) |
| continue; |
| pmu_num++; |
| |
| ret = do_write(fd, &pmu->type, sizeof(pmu->type)); |
| if (ret < 0) |
| return ret; |
| |
| ret = do_write_string(fd, pmu->name); |
| if (ret < 0) |
| return ret; |
| } |
| |
| if (pwrite(fd, &pmu_num, sizeof(pmu_num), offset) != sizeof(pmu_num)) { |
| /* discard all */ |
| lseek(fd, offset, SEEK_SET); |
| return -1; |
| } |
| |
| 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(int fd, struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist) |
| { |
| u32 nr_groups = evlist->nr_groups; |
| struct perf_evsel *evsel; |
| int ret; |
| |
| ret = do_write(fd, &nr_groups, sizeof(nr_groups)); |
| if (ret < 0) |
| return ret; |
| |
| evlist__for_each(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(fd, name); |
| if (ret < 0) |
| return ret; |
| |
| ret = do_write(fd, &leader_idx, sizeof(leader_idx)); |
| if (ret < 0) |
| return ret; |
| |
| ret = do_write(fd, &nr_members, sizeof(nr_members)); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| return 0; |
| } |
| |
| /* |
| * default get_cpuid(): nothing gets recorded |
| * actual implementation must be in arch/$(ARCH)/util/header.c |
| */ |
| int __attribute__ ((weak)) get_cpuid(char *buffer __maybe_unused, |
| size_t sz __maybe_unused) |
| { |
| return -1; |
| } |
| |
| static int write_cpuid(int fd, struct perf_header *h __maybe_unused, |
| 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(fd, buffer); |
| } |
| |
| static int write_branch_stack(int fd __maybe_unused, |
| struct perf_header *h __maybe_unused, |
| struct perf_evlist *evlist __maybe_unused) |
| { |
| return 0; |
| } |
| |
| static void print_hostname(struct perf_header *ph, int fd __maybe_unused, |
| FILE *fp) |
| { |
| fprintf(fp, "# hostname : %s\n", ph->env.hostname); |
| } |
| |
| static void print_osrelease(struct perf_header *ph, int fd __maybe_unused, |
| FILE *fp) |
| { |
| fprintf(fp, "# os release : %s\n", ph->env.os_release); |
| } |
| |
| static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp) |
| { |
| fprintf(fp, "# arch : %s\n", ph->env.arch); |
| } |
| |
| static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused, |
| FILE *fp) |
| { |
| fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc); |
| } |
| |
| static void print_nrcpus(struct perf_header *ph, int fd __maybe_unused, |
| FILE *fp) |
| { |
| fprintf(fp, "# nrcpus online : %u\n", ph->env.nr_cpus_online); |
| fprintf(fp, "# nrcpus avail : %u\n", ph->env.nr_cpus_avail); |
| } |
| |
| static void print_version(struct perf_header *ph, int fd __maybe_unused, |
| FILE *fp) |
| { |
| fprintf(fp, "# perf version : %s\n", ph->env.version); |
| } |
| |
| static void print_cmdline(struct perf_header *ph, int fd __maybe_unused, |
| FILE *fp) |
| { |
| int nr, i; |
| char *str; |
| |
| nr = ph->env.nr_cmdline; |
| str = ph->env.cmdline; |
| |
| fprintf(fp, "# cmdline : "); |
| |
| for (i = 0; i < nr; i++) { |
| fprintf(fp, "%s ", str); |
| str += strlen(str) + 1; |
| } |
| fputc('\n', fp); |
| } |
| |
| static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused, |
| FILE *fp) |
| { |
| 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; |
| } |
| } |
| |
| 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 perf_header *ph, int fd) |
| { |
| struct perf_evsel *evsel, *events = NULL; |
| u64 *id; |
| void *buf = NULL; |
| u32 nre, sz, nr, i, j; |
| ssize_t ret; |
| size_t msz; |
| |
| /* number of events */ |
| ret = readn(fd, &nre, sizeof(nre)); |
| if (ret != (ssize_t)sizeof(nre)) |
| goto error; |
| |
| if (ph->needs_swap) |
| nre = bswap_32(nre); |
| |
| ret = readn(fd, &sz, sizeof(sz)); |
| if (ret != (ssize_t)sizeof(sz)) |
| goto error; |
| |
| if (ph->needs_swap) |
| sz = bswap_32(sz); |
| |
| /* 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. |
| */ |
| ret = readn(fd, buf, sz); |
| if (ret != (ssize_t)sz) |
| goto error; |
| |
| if (ph->needs_swap) |
| perf_event__attr_swap(buf); |
| |
| memcpy(&evsel->attr, buf, msz); |
| |
| ret = readn(fd, &nr, sizeof(nr)); |
| if (ret != (ssize_t)sizeof(nr)) |
| goto error; |
| |
| if (ph->needs_swap) { |
| nr = bswap_32(nr); |
| evsel->needs_swap = true; |
| } |
| |
| evsel->name = do_read_string(fd, ph); |
| |
| if (!nr) |
| continue; |
| |
| id = calloc(nr, sizeof(*id)); |
| if (!id) |
| goto error; |
| evsel->ids = nr; |
| evsel->id = id; |
| |
| for (j = 0 ; j < nr; j++) { |
| ret = readn(fd, id, sizeof(*id)); |
| if (ret != (ssize_t)sizeof(*id)) |
| goto error; |
| if (ph->needs_swap) |
| *id = bswap_64(*id); |
| id++; |
| } |
| } |
| out: |
| free(buf); |
| return events; |
| error: |
| if (events) |
| free_event_desc(events); |
| events = NULL; |
| goto out; |
| } |
| |
| static void print_event_desc(struct perf_header *ph, int fd, FILE *fp) |
| { |
| struct perf_evsel *evsel, *events = read_event_desc(ph, fd); |
| u32 j; |
| u64 *id; |
| |
| 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); |
| |
| fprintf(fp, "type = %d, config = 0x%"PRIx64 |
| ", config1 = 0x%"PRIx64", config2 = 0x%"PRIx64, |
| evsel->attr.type, |
| (u64)evsel->attr.config, |
| (u64)evsel->attr.config1, |
| (u64)evsel->attr.config2); |
| |
| fprintf(fp, ", excl_usr = %d, excl_kern = %d", |
| evsel->attr.exclude_user, |
| evsel->attr.exclude_kernel); |
| |
| fprintf(fp, ", excl_host = %d, excl_guest = %d", |
| evsel->attr.exclude_host, |
| evsel->attr.exclude_guest); |
| |
| fprintf(fp, ", precise_ip = %d", evsel->attr.precise_ip); |
| |
| fprintf(fp, ", attr_mmap2 = %d", evsel->attr.mmap2); |
| fprintf(fp, ", attr_mmap = %d", evsel->attr.mmap); |
| fprintf(fp, ", attr_mmap_data = %d", evsel->attr.mmap_data); |
| 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, " }"); |
| } |
| |
| fputc('\n', fp); |
| } |
| |
| free_event_desc(events); |
| } |
| |
| static void print_total_mem(struct perf_header *ph, int fd __maybe_unused, |
| FILE *fp) |
| { |
| fprintf(fp, "# total memory : %Lu kB\n", ph->env.total_mem); |
| } |
| |
| static void print_numa_topology(struct perf_header *ph, int fd __maybe_unused, |
| FILE *fp) |
| { |
| u32 nr, c, i; |
| char *str, *tmp; |
| uint64_t mem_total, mem_free; |
| |
| /* nr nodes */ |
| nr = ph->env.nr_numa_nodes; |
| str = ph->env.numa_nodes; |
| |
| for (i = 0; i < nr; i++) { |
| /* node number */ |
| c = strtoul(str, &tmp, 0); |
| if (*tmp != ':') |
| goto error; |
| |
| str = tmp + 1; |
| mem_total = strtoull(str, &tmp, 0); |
| if (*tmp != ':') |
| goto error; |
| |
| str = tmp + 1; |
| mem_free = strtoull(str, &tmp, 0); |
| if (*tmp != ':') |
| goto error; |
| |
| fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB," |
| " free = %"PRIu64" kB\n", |
| c, mem_total, mem_free); |
| |
| str = tmp + 1; |
| fprintf(fp, "# node%u cpu list : %s\n", c, str); |
| |
| str += strlen(str) + 1; |
| } |
| return; |
| error: |
| fprintf(fp, "# numa topology : not available\n"); |
| } |
| |
| static void print_cpuid(struct perf_header *ph, int fd __maybe_unused, FILE *fp) |
| { |
| fprintf(fp, "# cpuid : %s\n", ph->env.cpuid); |
| } |
| |
| static void print_branch_stack(struct perf_header *ph __maybe_unused, |
| int fd __maybe_unused, FILE *fp) |
| { |
| fprintf(fp, "# contains samples with branch stack\n"); |
| } |
| |
| static void print_pmu_mappings(struct perf_header *ph, int fd __maybe_unused, |
| FILE *fp) |
| { |
| const char *delimiter = "# pmu mappings: "; |
| char *str, *tmp; |
| u32 pmu_num; |
| u32 type; |
| |
| pmu_num = ph->env.nr_pmu_mappings; |
| if (!pmu_num) { |
| fprintf(fp, "# pmu mappings: not available\n"); |
| return; |
| } |
| |
| str = 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 perf_header *ph, int fd __maybe_unused, |
| FILE *fp) |
| { |
| struct perf_session *session; |
| struct perf_evsel *evsel; |
| u32 nr = 0; |
| |
| session = container_of(ph, struct perf_session, header); |
| |
| evlist__for_each(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 int __event_process_build_id(struct build_id_event *bev, |
| char *filename, |
| struct perf_session *session) |
| { |
| int err = -1; |
| struct dsos *dsos; |
| struct machine *machine; |
| u16 misc; |
| struct dso *dso; |
| enum dso_kernel_type dso_type; |
| |
| machine = perf_session__findnew_machine(session, bev->pid); |
| if (!machine) |
| goto out; |
| |
| misc = bev->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; |
| |
| switch (misc) { |
| case PERF_RECORD_MISC_KERNEL: |
| dso_type = DSO_TYPE_KERNEL; |
| dsos = &machine->kernel_dsos; |
| break; |
| case PERF_RECORD_MISC_GUEST_KERNEL: |
| dso_type = DSO_TYPE_GUEST_KERNEL; |
| dsos = &machine->kernel_dsos; |
| break; |
| case PERF_RECORD_MISC_USER: |
| case PERF_RECORD_MISC_GUEST_USER: |
| dso_type = DSO_TYPE_USER; |
| dsos = &machine->user_dsos; |
| break; |
| default: |
| goto out; |
| } |
| |
| dso = __dsos__findnew(dsos, filename); |
| if (dso != NULL) { |
| char sbuild_id[BUILD_ID_SIZE * 2 + 1]; |
| |
| dso__set_build_id(dso, &bev->build_id); |
| |
| if (filename[0] == '[') |
| dso->kernel = dso_type; |
| |
| 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); |
| } |
| |
| 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; |
| } |
| |
| static int process_tracing_data(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph __maybe_unused, |
| int fd, void *data) |
| { |
| ssize_t ret = trace_report(fd, data, false); |
| return ret < 0 ? -1 : 0; |
| } |
| |
| static int process_build_id(struct perf_file_section *section, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| if (perf_header__read_build_ids(ph, fd, section->offset, section->size)) |
| pr_debug("Failed to read buildids, continuing...\n"); |
| return 0; |
| } |
| |
| static int process_hostname(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| ph->env.hostname = do_read_string(fd, ph); |
| return ph->env.hostname ? 0 : -ENOMEM; |
| } |
| |
| static int process_osrelease(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| ph->env.os_release = do_read_string(fd, ph); |
| return ph->env.os_release ? 0 : -ENOMEM; |
| } |
| |
| static int process_version(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| ph->env.version = do_read_string(fd, ph); |
| return ph->env.version ? 0 : -ENOMEM; |
| } |
| |
| static int process_arch(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| ph->env.arch = do_read_string(fd, ph); |
| return ph->env.arch ? 0 : -ENOMEM; |
| } |
| |
| static int process_nrcpus(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| ssize_t ret; |
| u32 nr; |
| |
| ret = readn(fd, &nr, sizeof(nr)); |
| if (ret != sizeof(nr)) |
| return -1; |
| |
| if (ph->needs_swap) |
| nr = bswap_32(nr); |
| |
| ph->env.nr_cpus_online = nr; |
| |
| ret = readn(fd, &nr, sizeof(nr)); |
| if (ret != sizeof(nr)) |
| return -1; |
| |
| if (ph->needs_swap) |
| nr = bswap_32(nr); |
| |
| ph->env.nr_cpus_avail = nr; |
| return 0; |
| } |
| |
| static int process_cpudesc(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| ph->env.cpu_desc = do_read_string(fd, ph); |
| return ph->env.cpu_desc ? 0 : -ENOMEM; |
| } |
| |
| static int process_cpuid(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| ph->env.cpuid = do_read_string(fd, ph); |
| return ph->env.cpuid ? 0 : -ENOMEM; |
| } |
| |
| static int process_total_mem(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| uint64_t mem; |
| ssize_t ret; |
| |
| ret = readn(fd, &mem, sizeof(mem)); |
| if (ret != sizeof(mem)) |
| return -1; |
| |
| if (ph->needs_swap) |
| mem = bswap_64(mem); |
| |
| ph->env.total_mem = 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(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 perf_file_section *section __maybe_unused, |
| struct perf_header *header, int fd, |
| void *data __maybe_unused) |
| { |
| struct perf_session *session; |
| struct perf_evsel *evsel, *events = read_event_desc(header, fd); |
| |
| if (!events) |
| return 0; |
| |
| session = container_of(header, struct perf_session, header); |
| for (evsel = events; evsel->attr.size; evsel++) |
| perf_evlist__set_event_name(session->evlist, evsel); |
| |
| free_event_desc(events); |
| |
| return 0; |
| } |
| |
| static int process_cmdline(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| ssize_t ret; |
| char *str; |
| u32 nr, i; |
| struct strbuf sb; |
| |
| ret = readn(fd, &nr, sizeof(nr)); |
| if (ret != sizeof(nr)) |
| return -1; |
| |
| if (ph->needs_swap) |
| nr = bswap_32(nr); |
| |
| ph->env.nr_cmdline = nr; |
| strbuf_init(&sb, 128); |
| |
| for (i = 0; i < nr; i++) { |
| str = do_read_string(fd, ph); |
| if (!str) |
| goto error; |
| |
| /* include a NULL character at the end */ |
| strbuf_add(&sb, str, strlen(str) + 1); |
| free(str); |
| } |
| ph->env.cmdline = strbuf_detach(&sb, NULL); |
| return 0; |
| |
| error: |
| strbuf_release(&sb); |
| return -1; |
| } |
| |
| static int process_cpu_topology(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| ssize_t ret; |
| u32 nr, i; |
| char *str; |
| struct strbuf sb; |
| |
| ret = readn(fd, &nr, sizeof(nr)); |
| if (ret != sizeof(nr)) |
| return -1; |
| |
| if (ph->needs_swap) |
| nr = bswap_32(nr); |
| |
| ph->env.nr_sibling_cores = nr; |
| strbuf_init(&sb, 128); |
| |
| for (i = 0; i < nr; i++) { |
| str = do_read_string(fd, ph); |
| if (!str) |
| goto error; |
| |
| /* include a NULL character at the end */ |
| strbuf_add(&sb, str, strlen(str) + 1); |
| free(str); |
| } |
| ph->env.sibling_cores = strbuf_detach(&sb, NULL); |
| |
| ret = readn(fd, &nr, sizeof(nr)); |
| if (ret != sizeof(nr)) |
| return -1; |
| |
| if (ph->needs_swap) |
| nr = bswap_32(nr); |
| |
| ph->env.nr_sibling_threads = nr; |
| |
| for (i = 0; i < nr; i++) { |
| str = do_read_string(fd, ph); |
| if (!str) |
| goto error; |
| |
| /* include a NULL character at the end */ |
| strbuf_add(&sb, str, strlen(str) + 1); |
| free(str); |
| } |
| ph->env.sibling_threads = strbuf_detach(&sb, NULL); |
| return 0; |
| |
| error: |
| strbuf_release(&sb); |
| return -1; |
| } |
| |
| static int process_numa_topology(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| ssize_t ret; |
| u32 nr, node, i; |
| char *str; |
| uint64_t mem_total, mem_free; |
| struct strbuf sb; |
| |
| /* nr nodes */ |
| ret = readn(fd, &nr, sizeof(nr)); |
| if (ret != sizeof(nr)) |
| goto error; |
| |
| if (ph->needs_swap) |
| nr = bswap_32(nr); |
| |
| ph->env.nr_numa_nodes = nr; |
| strbuf_init(&sb, 256); |
| |
| for (i = 0; i < nr; i++) { |
| /* node number */ |
| ret = readn(fd, &node, sizeof(node)); |
| if (ret != sizeof(node)) |
| goto error; |
| |
| ret = readn(fd, &mem_total, sizeof(u64)); |
| if (ret != sizeof(u64)) |
| goto error; |
| |
| ret = readn(fd, &mem_free, sizeof(u64)); |
| if (ret != sizeof(u64)) |
| goto error; |
| |
| if (ph->needs_swap) { |
| node = bswap_32(node); |
| mem_total = bswap_64(mem_total); |
| mem_free = bswap_64(mem_free); |
| } |
| |
| strbuf_addf(&sb, "%u:%"PRIu64":%"PRIu64":", |
| node, mem_total, mem_free); |
| |
| str = do_read_string(fd, ph); |
| if (!str) |
| goto error; |
| |
| /* include a NULL character at the end */ |
| strbuf_add(&sb, str, strlen(str) + 1); |
| free(str); |
| } |
| ph->env.numa_nodes = strbuf_detach(&sb, NULL); |
| return 0; |
| |
| error: |
| strbuf_release(&sb); |
| return -1; |
| } |
| |
| static int process_pmu_mappings(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| void *data __maybe_unused) |
| { |
| ssize_t ret; |
| char *name; |
| u32 pmu_num; |
| u32 type; |
| struct strbuf sb; |
| |
| ret = readn(fd, &pmu_num, sizeof(pmu_num)); |
| if (ret != sizeof(pmu_num)) |
| return -1; |
| |
| if (ph->needs_swap) |
| pmu_num = bswap_32(pmu_num); |
| |
| if (!pmu_num) { |
| pr_debug("pmu mappings not available\n"); |
| return 0; |
| } |
| |
| ph->env.nr_pmu_mappings = pmu_num; |
| strbuf_init(&sb, 128); |
| |
| while (pmu_num) { |
| if (readn(fd, &type, sizeof(type)) != sizeof(type)) |
| goto error; |
| if (ph->needs_swap) |
| type = bswap_32(type); |
| |
| name = do_read_string(fd, ph); |
| if (!name) |
| goto error; |
| |
| strbuf_addf(&sb, "%u:%s", type, name); |
| /* include a NULL character at the end */ |
| strbuf_add(&sb, "", 1); |
| |
| free(name); |
| pmu_num--; |
| } |
| ph->env.pmu_mappings = strbuf_detach(&sb, NULL); |
| return 0; |
| |
| error: |
| strbuf_release(&sb); |
| return -1; |
| } |
| |
| static int process_group_desc(struct perf_file_section *section __maybe_unused, |
| struct perf_header *ph, int fd, |
| 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 (readn(fd, &nr_groups, sizeof(nr_groups)) != sizeof(nr_groups)) |
| return -1; |
| |
| if (ph->needs_swap) |
| nr_groups = bswap_32(nr_groups); |
| |
| 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(fd, ph); |
| if (!desc[i].name) |
| goto out_free; |
| |
| if (readn(fd, &desc[i].leader_idx, sizeof(u32)) != sizeof(u32)) |
| goto out_free; |
| |
| if (readn(fd, &desc[i].nr_members, sizeof(u32)) != sizeof(u32)) |
| goto out_free; |
| |
| if (ph->needs_swap) { |
| desc[i].leader_idx = bswap_32(desc[i].leader_idx); |
| desc[i].nr_members = bswap_32(desc[i].nr_members); |
| } |
| } |
| |
| /* |
| * Rebuild group relationship based on the group_desc |
| */ |
| session = container_of(ph, struct perf_session, header); |
| session->evlist->nr_groups = nr_groups; |
| |
| i = nr = 0; |
| evlist__for_each(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; |
| } |
| |
| struct feature_ops { |
| int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist); |
| void (*print)(struct perf_header *h, int fd, FILE *fp); |
| int (*process)(struct perf_file_section *section, |
| struct perf_header *h, int fd, void *data); |
| const char *name; |
| bool full_only; |
| }; |
| |
| #define FEAT_OPA(n, func) \ |
| [n] = { .name = #n, .write = write_##func, .print = print_##func } |
| #define FEAT_OPP(n, func) \ |
| [n] = { .name = #n, .write = write_##func, .print = print_##func, \ |
| .process = process_##func } |
| #define FEAT_OPF(n, func) \ |
| [n] = { .name = #n, .write = write_##func, .print = print_##func, \ |
| .process = process_##func, .full_only = true } |
| |
| /* feature_ops not implemented: */ |
| #define print_tracing_data NULL |
| #define print_build_id NULL |
| |
| static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = { |
| FEAT_OPP(HEADER_TRACING_DATA, tracing_data), |
| FEAT_OPP(HEADER_BUILD_ID, build_id), |
| FEAT_OPP(HEADER_HOSTNAME, hostname), |
| FEAT_OPP(HEADER_OSRELEASE, osrelease), |
| FEAT_OPP(HEADER_VERSION, version), |
| FEAT_OPP(HEADER_ARCH, arch), |
| FEAT_OPP(HEADER_NRCPUS, nrcpus), |
| FEAT_OPP(HEADER_CPUDESC, cpudesc), |
| FEAT_OPP(HEADER_CPUID, cpuid), |
| FEAT_OPP(HEADER_TOTAL_MEM, total_mem), |
| FEAT_OPP(HEADER_EVENT_DESC, event_desc), |
| FEAT_OPP(HEADER_CMDLINE, cmdline), |
| FEAT_OPF(HEADER_CPU_TOPOLOGY, cpu_topology), |
| FEAT_OPF(HEADER_NUMA_TOPOLOGY, numa_topology), |
| FEAT_OPA(HEADER_BRANCH_STACK, branch_stack), |
| FEAT_OPP(HEADER_PMU_MAPPINGS, pmu_mappings), |
| FEAT_OPP(HEADER_GROUP_DESC, group_desc), |
| }; |
| |
| 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; |
| |
| 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; |
| |
| if (!feat_ops[feat].full_only || hd->full) |
| feat_ops[feat].print(ph, fd, 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_file__fd(session->file); |
| hd.fp = fp; |
| hd.full = full; |
| |
| perf_header__process_sections(header, fd, &hd, |
| perf_file_section__fprintf_info); |
| return 0; |
| } |
| |
| static int do_write_feat(int fd, struct perf_header *h, int type, |
| struct perf_file_section **p, |
| struct perf_evlist *evlist) |
| { |
| int err; |
| int ret = 0; |
| |
| if (perf_header__has_feat(h, type)) { |
| if (!feat_ops[type].write) |
| return -1; |
| |
| (*p)->offset = lseek(fd, 0, SEEK_CUR); |
| |
| err = feat_ops[type].write(fd, h, evlist); |
| if (err < 0) { |
| pr_debug("failed to write feature %d\n", type); |
| |
| /* undo anything written */ |
| lseek(fd, (*p)->offset, SEEK_SET); |
| |
| return -1; |
| } |
| (*p)->size = lseek(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 perf_file_section *feat_sec, *p; |
| int sec_size; |
| u64 sec_start; |
| int feat; |
| int err; |
| |
| 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(fd, header, 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 mising entries |
| */ |
| err = do_write(fd, 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; |
| int err; |
| |
| f_header = (struct perf_pipe_file_header){ |
| .magic = PERF_MAGIC, |
| .size = sizeof(f_header), |
| }; |
| |
| err = do_write(fd, &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; |
| u64 attr_offset; |
| int err; |
| |
| lseek(fd, sizeof(f_header), SEEK_SET); |
| |
| evlist__for_each(session->evlist, evsel) { |
| evsel->id_offset = lseek(fd, 0, SEEK_CUR); |
| err = do_write(fd, evsel->id, evsel->ids * sizeof(u64)); |
| if (err < 0) { |
| pr_debug("failed to write perf header\n"); |
| return err; |
| } |
| } |
| |
| attr_offset = lseek(fd, 0, SEEK_CUR); |
| |
| evlist__for_each(evlist, evsel) { |
| f_attr = (struct perf_file_attr){ |
| .attr = evsel->attr, |
| .ids = { |
| .offset = evsel->id_offset, |
| .size = evsel->ids * sizeof(u64), |
| } |
| }; |
| err = do_write(fd, &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(fd, &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, |
| 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 |
| */ |
| |
| /* 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; |
| ph->version = PERF_HEADER_VERSION_2; |
| |
| 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) |
| { |
| 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(section, ph, fd, data); |
| } |
| |
| static int perf_file_header__read_pipe(struct perf_pipe_file_header *header, |
| struct perf_header *ph, int fd, |
| bool repipe) |
| { |
| 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(STDOUT_FILENO, 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_file__fd(session->file), |
| 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 pevent *pevent) |
| { |
| struct event_format *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 = pevent_find_event(pevent, evsel->attr.config); |
| if (event == NULL) |
| 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 pevent *pevent) |
| { |
| struct perf_evsel *pos; |
| |
| evlist__for_each(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_file *file = session->file; |
| 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_file__fd(file); |
| |
| session->evlist = perf_evlist__new(); |
| if (session->evlist == NULL) |
| return -ENOMEM; |
| |
| if (perf_data_file__is_pipe(file)) |
| 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", |
| 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) |
| 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); |
| } |
| |
| symbol_conf.nr_events = nr_attrs; |
| |
| 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_attrs(struct perf_tool *tool, |
| struct perf_session *session, |
| perf_event__handler_t process) |
| { |
| struct perf_evsel *evsel; |
| int err = 0; |
| |
| evlist__for_each(session->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; |
| } |
| |
| 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]); |
| } |
| |
| symbol_conf.nr_events = evlist->nr_entries; |
| |
| 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; |
| 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); |
| |
| write_padded(fd, NULL, 0, padding); |
| |
| return aligned_size; |
| } |
| |
| int perf_event__process_tracing_data(struct perf_tool *tool __maybe_unused, |
| union perf_event *event, |
| struct perf_session *session) |
| { |
| ssize_t size_read, padding, size = event->tracing_data.size; |
| int fd = perf_data_file__fd(session->file); |
| 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_tool *tool __maybe_unused, |
| union perf_event *event, |
| struct perf_session *session) |
| { |
| __event_process_build_id(&event->build_id, |
| event->build_id.filename, |
| session); |
| return 0; |
| } |
| |
| void disable_buildid_cache(void) |
| { |
| no_buildid_cache = true; |
| } |