diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/util/header.c | 3946 |
1 files changed, 3946 insertions, 0 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c new file mode 100644 index 000000000..3c0d74fc1 --- /dev/null +++ b/tools/perf/util/header.c @@ -0,0 +1,3946 @@ +// 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; +} + +/* + * 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 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->size); + 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 (MAX_NR_CPUS * 4) + +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 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. + * AArch64 is the same. + */ + if (ph->env.arch && (!strncmp(ph->env.arch, "s390", 4) + || !strncmp(ph->env.arch, "aarch64", 7))) + 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; +} + +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), +}; + +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 mising 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 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 = 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); + } + + if (f_header.attr_size == 0) { + pr_err("ERROR: The %s file's attr size field is 0 which is unexpected.\n" + "Was the 'perf record' command properly terminated?\n", + data->file.path); + return -EINVAL; + } + + 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 = zalloc(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_tool *tool, + union perf_event *event, + struct perf_session *session __maybe_unused) +{ + 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(*fe); + 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_session *session, + perf_event__handler_t process) +{ + struct perf_evsel *evsel; + int err = 0; + + evlist__for_each_entry(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; +} + +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_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__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_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; +} |