diff options
Diffstat (limited to 'tools/perf/util/header.c')
| -rw-r--r-- | tools/perf/util/header.c | 2075 |
1 files changed, 1440 insertions, 635 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index ecd7f4dd7ee..893f8e2df92 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -1,5 +1,3 @@ -#define _FILE_OFFSET_BITS 64 - #include "util.h" #include <sys/types.h> #include <byteswap.h> @@ -20,52 +18,31 @@ #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 int event_count; -static struct perf_trace_event_type *events; - static u32 header_argc; static const char **header_argv; -int perf_header__push_event(u64 id, const char *name) -{ - if (strlen(name) > MAX_EVENT_NAME) - pr_warning("Event %s will be truncated\n", name); - - if (!events) { - events = malloc(sizeof(struct perf_trace_event_type)); - if (events == NULL) - return -ENOMEM; - } else { - struct perf_trace_event_type *nevents; - - nevents = realloc(events, (event_count + 1) * sizeof(*events)); - if (nevents == NULL) - return -ENOMEM; - events = nevents; - } - memset(&events[event_count], 0, sizeof(struct perf_trace_event_type)); - events[event_count].event_id = id; - strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1); - event_count++; - return 0; -} - -char *perf_header__find_event(u64 id) -{ - int i; - for (i = 0 ; i < event_count; i++) { - if (events[i].event_id == id) - return events[i].name; - } - return NULL; -} - -static const char *__perf_magic = "PERFFILE"; +/* + * 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 (*(u64 *)__perf_magic) +#define PERF_MAGIC __perf_magic2 struct perf_file_attr { struct perf_event_attr attr; @@ -122,7 +99,7 @@ static int do_write_string(int fd, const char *str) int ret; olen = strlen(str) + 1; - len = ALIGN(olen, NAME_ALIGN); + len = PERF_ALIGN(olen, NAME_ALIGN); /* write len, incl. \0 */ ret = do_write(fd, &len, sizeof(len)); @@ -138,7 +115,7 @@ static char *do_read_string(int fd, struct perf_header *ph) u32 len; char *buf; - sz = read(fd, &len, sizeof(len)); + sz = readn(fd, &len, sizeof(len)); if (sz < (ssize_t)sizeof(len)) return NULL; @@ -149,7 +126,7 @@ static char *do_read_string(int fd, struct perf_header *ph) if (!buf) return NULL; - ret = read(fd, buf, len); + ret = readn(fd, buf, len); if (ret == (ssize_t)len) { /* * strings are padded by zeroes @@ -168,6 +145,15 @@ 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 */ @@ -191,31 +177,59 @@ perf_header__set_cmdline(int argc, const char **argv) continue; \ else -static int __dsos__write_buildid_table(struct list_head *head, pid_t pid, - u16 misc, int fd) +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__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; - struct build_id_event b; - size_t len; + const char *name; + size_t name_len; if (!pos->hit) continue; - len = pos->long_name_len + 1; - len = ALIGN(len, NAME_ALIGN); - memset(&b, 0, sizeof(b)); - memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id)); - 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; - err = write_padded(fd, pos->long_name, - pos->long_name_len + 1, len); - if (err < 0) + + if (is_vdso_map(pos->short_name)) { + name = (char *) VDSO__MAP_NAME; + name_len = sizeof(VDSO__MAP_NAME) + 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; } @@ -233,10 +247,10 @@ static int machine__write_buildid_table(struct machine *machine, int fd) umisc = PERF_RECORD_MISC_GUEST_USER; } - err = __dsos__write_buildid_table(&machine->kernel_dsos, machine->pid, - kmisc, fd); + err = __dsos__write_buildid_table(&machine->kernel_dsos, machine, + machine->pid, kmisc, fd); if (err == 0) - err = __dsos__write_buildid_table(&machine->user_dsos, + err = __dsos__write_buildid_table(&machine->user_dsos, machine, machine->pid, umisc, fd); return err; } @@ -246,12 +260,12 @@ static int dsos__write_buildid_table(struct perf_header *header, int fd) struct perf_session *session = container_of(header, struct perf_session, header); struct rb_node *nd; - int err = machine__write_buildid_table(&session->host_machine, fd); + int err = machine__write_buildid_table(&session->machines.host, fd); if (err) return err; - for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) { + 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) @@ -261,31 +275,34 @@ static int dsos__write_buildid_table(struct perf_header *header, int fd) } int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, - const char *name, bool is_kallsyms) + 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"); - return 0; + err = 0; + goto out_free; } - realname = (char *)name; + realname = (char *) name; } else realname = realpath(name, NULL); if (realname == NULL || filename == NULL || linkname == NULL) goto out_free; - len = snprintf(filename, size, "%s%s%s", - debugdir, is_kallsyms ? "/" : "", realname); + len = scnprintf(filename, size, "%s%s%s", + debugdir, slash ? "/" : "", + is_vdso ? VDSO__MAP_NAME : realname); if (mkdir_p(filename, 0755)) goto out_free; - snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id); + snprintf(filename + len, size - len, "/%s", sbuild_id); if (access(filename, F_OK)) { if (is_kallsyms) { @@ -295,7 +312,7 @@ int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, goto out_free; } - len = snprintf(linkname, size, "%s/.build-id/%.2s", + len = scnprintf(linkname, size, "%s/.build-id/%.2s", debugdir, sbuild_id); if (access(linkname, X_OK) && mkdir_p(linkname, 0755)) @@ -317,13 +334,14 @@ out_free: 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_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); + 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) @@ -364,21 +382,31 @@ out_free: return err; } -static int dso__cache_build_id(struct dso *dso, const char *debugdir) +static int dso__cache_build_id(struct dso *dso, struct machine *machine, + const char *debugdir) { bool is_kallsyms = dso->kernel && dso->long_name[0] != '/'; - - return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id), - dso->long_name, debugdir, is_kallsyms); + bool is_vdso = is_vdso_map(dso->short_name); + 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, const char *debugdir) +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, debugdir)) + if (dso__cache_build_id(pos, machine, debugdir)) err = -1; return err; @@ -386,8 +414,9 @@ static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir) static int machine__cache_build_ids(struct machine *machine, const char *debugdir) { - int ret = __dsos__cache_build_ids(&machine->kernel_dsos, debugdir); - ret |= __dsos__cache_build_ids(&machine->user_dsos, debugdir); + int ret = __dsos__cache_build_ids(&machine->kernel_dsos, machine, + debugdir); + ret |= __dsos__cache_build_ids(&machine->user_dsos, machine, debugdir); return ret; } @@ -402,9 +431,9 @@ static int perf_session__cache_build_ids(struct perf_session *session) if (mkdir(debugdir, 0755) != 0 && errno != EEXIST) return -1; - ret = machine__cache_build_ids(&session->host_machine, debugdir); + ret = machine__cache_build_ids(&session->machines.host, debugdir); - for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) { + 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); } @@ -421,9 +450,9 @@ static bool machine__read_build_ids(struct machine *machine, bool with_hits) 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->host_machine, with_hits); + bool ret = machine__read_build_ids(&session->machines.host, with_hits); - for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) { + 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); } @@ -431,7 +460,7 @@ static bool perf_session__read_build_ids(struct perf_session *session, bool with return ret; } -static int write_trace_info(int fd, struct perf_header *h __used, +static int write_tracing_data(int fd, struct perf_header *h __maybe_unused, struct perf_evlist *evlist) { return read_tracing_data(fd, &evlist->entries); @@ -439,7 +468,7 @@ static int write_trace_info(int fd, struct perf_header *h __used, static int write_build_id(int fd, struct perf_header *h, - struct perf_evlist *evlist __used) + struct perf_evlist *evlist __maybe_unused) { struct perf_session *session; int err; @@ -460,8 +489,8 @@ static int write_build_id(int fd, struct perf_header *h, return 0; } -static int write_hostname(int fd, struct perf_header *h __used, - struct perf_evlist *evlist __used) +static int write_hostname(int fd, struct perf_header *h __maybe_unused, + struct perf_evlist *evlist __maybe_unused) { struct utsname uts; int ret; @@ -473,8 +502,8 @@ static int write_hostname(int fd, struct perf_header *h __used, return do_write_string(fd, uts.nodename); } -static int write_osrelease(int fd, struct perf_header *h __used, - struct perf_evlist *evlist __used) +static int write_osrelease(int fd, struct perf_header *h __maybe_unused, + struct perf_evlist *evlist __maybe_unused) { struct utsname uts; int ret; @@ -486,8 +515,8 @@ static int write_osrelease(int fd, struct perf_header *h __used, return do_write_string(fd, uts.release); } -static int write_arch(int fd, struct perf_header *h __used, - struct perf_evlist *evlist __used) +static int write_arch(int fd, struct perf_header *h __maybe_unused, + struct perf_evlist *evlist __maybe_unused) { struct utsname uts; int ret; @@ -499,14 +528,14 @@ static int write_arch(int fd, struct perf_header *h __used, return do_write_string(fd, uts.machine); } -static int write_version(int fd, struct perf_header *h __used, - struct perf_evlist *evlist __used) +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, struct perf_header *h __used, - struct perf_evlist *evlist __used) +static int write_cpudesc(int fd, struct perf_header *h __maybe_unused, + struct perf_evlist *evlist __maybe_unused) { #ifndef CPUINFO_PROC #define CPUINFO_PROC NULL @@ -564,8 +593,8 @@ done: return ret; } -static int write_nrcpus(int fd, struct perf_header *h __used, - struct perf_evlist *evlist __used) +static int write_nrcpus(int fd, struct perf_header *h __maybe_unused, + struct perf_evlist *evlist __maybe_unused) { long nr; u32 nrc, nra; @@ -590,15 +619,14 @@ static int write_nrcpus(int fd, struct perf_header *h __used, return do_write(fd, &nra, sizeof(nra)); } -static int write_event_desc(int fd, struct perf_header *h __used, +static int write_event_desc(int fd, struct perf_header *h __maybe_unused, struct perf_evlist *evlist) { - struct perf_evsel *attr; - u32 nre = 0, nri, sz; + struct perf_evsel *evsel; + u32 nre, nri, sz; int ret; - list_for_each_entry(attr, &evlist->entries, node) - nre++; + nre = evlist->nr_entries; /* * write number of events @@ -610,14 +638,13 @@ static int write_event_desc(int fd, struct perf_header *h __used, /* * size of perf_event_attr struct */ - sz = (u32)sizeof(attr->attr); + sz = (u32)sizeof(evsel->attr); ret = do_write(fd, &sz, sizeof(sz)); if (ret < 0) return ret; - list_for_each_entry(attr, &evlist->entries, node) { - - ret = do_write(fd, &attr->attr, sz); + evlist__for_each(evlist, evsel) { + ret = do_write(fd, &evsel->attr, sz); if (ret < 0) return ret; /* @@ -627,7 +654,7 @@ static int write_event_desc(int fd, struct perf_header *h __used, * copy into an nri to be independent of the * type of ids, */ - nri = attr->ids; + nri = evsel->ids; ret = do_write(fd, &nri, sizeof(nri)); if (ret < 0) return ret; @@ -635,21 +662,21 @@ static int write_event_desc(int fd, struct perf_header *h __used, /* * write event string as passed on cmdline */ - ret = do_write_string(fd, event_name(attr)); + ret = do_write_string(fd, perf_evsel__name(evsel)); if (ret < 0) return ret; /* * write unique ids for this event */ - ret = do_write(fd, attr->id, attr->ids * sizeof(u64)); + 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 __used, - struct perf_evlist *evlist __used) +static int write_cmdline(int fd, struct perf_header *h __maybe_unused, + struct perf_evlist *evlist __maybe_unused) { char buf[MAXPATHLEN]; char proc[32]; @@ -704,18 +731,19 @@ static int build_cpu_topo(struct cpu_topo *tp, int cpu) 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) - return -1; - - if (getline(&buf, &len, fp) <= 0) - goto done; + goto try_threads; + sret = getline(&buf, &len, fp); fclose(fp); + if (sret <= 0) + goto try_threads; p = strchr(buf, '\n'); if (p) @@ -731,7 +759,9 @@ static int build_cpu_topo(struct cpu_topo *tp, int cpu) buf = NULL; len = 0; } + ret = 0; +try_threads: sprintf(filename, THRD_SIB_FMT, cpu); fp = fopen(filename, "r"); if (!fp) @@ -769,10 +799,10 @@ static void free_cpu_topo(struct cpu_topo *tp) return; for (i = 0 ; i < tp->core_sib; i++) - free(tp->core_siblings[i]); + zfree(&tp->core_siblings[i]); for (i = 0 ; i < tp->thread_sib; i++) - free(tp->thread_siblings[i]); + zfree(&tp->thread_siblings[i]); free(tp); } @@ -817,8 +847,8 @@ static struct cpu_topo *build_cpu_topology(void) return tp; } -static int write_cpu_topology(int fd, struct perf_header *h __used, - struct perf_evlist *evlist __used) +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; @@ -853,8 +883,8 @@ done: -static int write_total_mem(int fd, struct perf_header *h __used, - struct perf_evlist *evlist __used) +static int write_total_mem(int fd, struct perf_header *h __maybe_unused, + struct perf_evlist *evlist __maybe_unused) { char *buf = NULL; FILE *fp; @@ -900,7 +930,7 @@ static int write_topo_node(int fd, int node) /* skip over invalid lines */ if (!strchr(buf, ':')) continue; - if (sscanf(buf, "%*s %*d %s %"PRIu64, field, &mem) != 2) + if (sscanf(buf, "%*s %*d %31s %"PRIu64, field, &mem) != 2) goto done; if (!strcmp(field, "MemTotal:")) mem_total = mem; @@ -909,6 +939,7 @@ static int write_topo_node(int fd, int node) } fclose(fp); + fp = NULL; ret = do_write(fd, &mem_total, sizeof(u64)); if (ret) @@ -935,12 +966,13 @@ static int write_topo_node(int fd, int node) ret = do_write_string(fd, buf); done: free(buf); - fclose(fp); + if (fp) + fclose(fp); return ret; } -static int write_numa_topology(int fd, struct perf_header *h __used, - struct perf_evlist *evlist __used) +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; @@ -989,16 +1021,111 @@ done: } /* + * 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 __used, size_t sz __used) +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 __used, - struct perf_evlist *evlist __used) +static int write_cpuid(int fd, struct perf_header *h __maybe_unused, + struct perf_evlist *evlist __maybe_unused) { char buffer[64]; int ret; @@ -1012,330 +1139,1017 @@ write_it: return do_write_string(fd, buffer); } -static void print_hostname(struct perf_header *ph, int fd, FILE *fp) +static int write_branch_stack(int fd __maybe_unused, + struct perf_header *h __maybe_unused, + struct perf_evlist *evlist __maybe_unused) { - char *str = do_read_string(fd, ph); - fprintf(fp, "# hostname : %s\n", str); - free(str); + return 0; } -static void print_osrelease(struct perf_header *ph, int fd, FILE *fp) +static void print_hostname(struct perf_header *ph, int fd __maybe_unused, + FILE *fp) { - char *str = do_read_string(fd, ph); - fprintf(fp, "# os release : %s\n", str); - free(str); + fprintf(fp, "# hostname : %s\n", ph->env.hostname); } -static void print_arch(struct perf_header *ph, int fd, FILE *fp) +static void print_osrelease(struct perf_header *ph, int fd __maybe_unused, + FILE *fp) { - char *str = do_read_string(fd, ph); - fprintf(fp, "# arch : %s\n", str); - free(str); + fprintf(fp, "# os release : %s\n", ph->env.os_release); } -static void print_cpudesc(struct perf_header *ph, int fd, FILE *fp) +static void print_arch(struct perf_header *ph, int fd __maybe_unused, FILE *fp) { - char *str = do_read_string(fd, ph); - fprintf(fp, "# cpudesc : %s\n", str); - free(str); + fprintf(fp, "# arch : %s\n", ph->env.arch); } -static void print_nrcpus(struct perf_header *ph, int fd, FILE *fp) +static void print_cpudesc(struct perf_header *ph, int fd __maybe_unused, + FILE *fp) { - ssize_t ret; - u32 nr; - - ret = read(fd, &nr, sizeof(nr)); - if (ret != (ssize_t)sizeof(nr)) - nr = -1; /* interpreted as error */ - - if (ph->needs_swap) - nr = bswap_32(nr); - - fprintf(fp, "# nrcpus online : %u\n", nr); - - ret = read(fd, &nr, sizeof(nr)); - if (ret != (ssize_t)sizeof(nr)) - nr = -1; /* interpreted as error */ - - if (ph->needs_swap) - nr = bswap_32(nr); + fprintf(fp, "# cpudesc : %s\n", ph->env.cpu_desc); +} - fprintf(fp, "# nrcpus avail : %u\n", nr); +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, FILE *fp) +static void print_version(struct perf_header *ph, int fd __maybe_unused, + FILE *fp) { - char *str = do_read_string(fd, ph); - fprintf(fp, "# perf version : %s\n", str); - free(str); + fprintf(fp, "# perf version : %s\n", ph->env.version); } -static void print_cmdline(struct perf_header *ph, int fd, FILE *fp) +static void print_cmdline(struct perf_header *ph, int fd __maybe_unused, + FILE *fp) { - ssize_t ret; + int nr, i; char *str; - u32 nr, i; - - ret = read(fd, &nr, sizeof(nr)); - if (ret != (ssize_t)sizeof(nr)) - return; - if (ph->needs_swap) - nr = bswap_32(nr); + nr = ph->env.nr_cmdline; + str = ph->env.cmdline; fprintf(fp, "# cmdline : "); for (i = 0; i < nr; i++) { - str = do_read_string(fd, ph); fprintf(fp, "%s ", str); - free(str); + str += strlen(str) + 1; } fputc('\n', fp); } -static void print_cpu_topology(struct perf_header *ph, int fd, FILE *fp) +static void print_cpu_topology(struct perf_header *ph, int fd __maybe_unused, + FILE *fp) { - ssize_t ret; - u32 nr, i; + int nr, i; char *str; - ret = read(fd, &nr, sizeof(nr)); - if (ret != (ssize_t)sizeof(nr)) - return; - - if (ph->needs_swap) - nr = bswap_32(nr); + nr = ph->env.nr_sibling_cores; + str = ph->env.sibling_cores; for (i = 0; i < nr; i++) { - str = do_read_string(fd, ph); fprintf(fp, "# sibling cores : %s\n", str); - free(str); + str += strlen(str) + 1; } - ret = read(fd, &nr, sizeof(nr)); - if (ret != (ssize_t)sizeof(nr)) - return; - - if (ph->needs_swap) - nr = bswap_32(nr); + nr = ph->env.nr_sibling_threads; + str = ph->env.sibling_threads; for (i = 0; i < nr; i++) { - str = do_read_string(fd, ph); fprintf(fp, "# sibling threads : %s\n", str); - free(str); + str += strlen(str) + 1; } } -static void print_event_desc(struct perf_header *ph, int fd, FILE *fp) +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_event_attr attr; - uint64_t id; + struct perf_evsel *evsel, *events = NULL; + u64 *id; void *buf = NULL; - char *str; - u32 nre, sz, nr, i, j, msz; - int ret; + u32 nre, sz, nr, i, j; + ssize_t ret; + size_t msz; /* number of events */ - ret = read(fd, &nre, sizeof(nre)); + ret = readn(fd, &nre, sizeof(nre)); if (ret != (ssize_t)sizeof(nre)) goto error; if (ph->needs_swap) nre = bswap_32(nre); - ret = read(fd, &sz, sizeof(sz)); + ret = readn(fd, &sz, sizeof(sz)); if (ret != (ssize_t)sizeof(sz)) goto error; if (ph->needs_swap) sz = bswap_32(sz); - /* - * ensure it is at least to our ABI rev - */ - if (sz < (u32)sizeof(attr)) - goto error; - - memset(&attr, 0, sizeof(attr)); - - /* read entire region to sync up to next field */ + /* buffer to hold on file attr struct */ buf = malloc(sz); if (!buf) goto error; - msz = sizeof(attr); + /* 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 ; i < nre; i++) { + for (i = 0, evsel = events; i < nre; evsel++, i++) { + evsel->idx = i; - ret = read(fd, buf, sz); + /* + * 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(&attr, buf, msz); + memcpy(&evsel->attr, buf, msz); - ret = read(fd, &nr, sizeof(nr)); + ret = readn(fd, &nr, sizeof(nr)); if (ret != (ssize_t)sizeof(nr)) goto error; - if (ph->needs_swap) + if (ph->needs_swap) { nr = bswap_32(nr); + evsel->needs_swap = true; + } - str = do_read_string(fd, ph); - fprintf(fp, "# event : name = %s, ", str); - free(str); + 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, - attr.type, - (u64)attr.config, - (u64)attr.config1, - (u64)attr.config2); + evsel->attr.type, + (u64)evsel->attr.config, + (u64)evsel->attr.config1, + (u64)evsel->attr.config2); fprintf(fp, ", excl_usr = %d, excl_kern = %d", - attr.exclude_user, - attr.exclude_kernel); + evsel->attr.exclude_user, + evsel->attr.exclude_kernel); + + fprintf(fp, ", excl_host = %d, excl_guest = %d", + evsel->attr.exclude_host, + evsel->attr.exclude_guest); - if (nr) + 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, " }"); + } - for (j = 0 ; j < nr; j++) { - ret = read(fd, &id, sizeof(id)); - if (ret != (ssize_t)sizeof(id)) - goto error; + fputc('\n', fp); + } - if (ph->needs_swap) - id = bswap_64(id); + 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); +} - if (j) - fputc(',', fp); +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; - fprintf(fp, " %"PRIu64, id); - } - if (nr && j == nr) - fprintf(fp, " }"); - fputc('\n', fp); + /* 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; } - free(buf); return; error: - fprintf(fp, "# event desc: not available or unable to read\n"); + 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 list_head *head; + 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; + head = &machine->kernel_dsos; + break; + case PERF_RECORD_MISC_GUEST_KERNEL: + dso_type = DSO_TYPE_GUEST_KERNEL; + head = &machine->kernel_dsos; + break; + case PERF_RECORD_MISC_USER: + case PERF_RECORD_MISC_GUEST_USER: + dso_type = DSO_TYPE_USER; + head = &machine->user_dsos; + break; + default: + goto out; + } + + dso = __dsos__findnew(head, 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 void print_total_mem(struct perf_header *h __used, int fd, FILE *fp) +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 = read(fd, &mem, sizeof(mem)); + ret = readn(fd, &mem, sizeof(mem)); if (ret != sizeof(mem)) - goto error; + return -1; - if (h->needs_swap) + if (ph->needs_swap) mem = bswap_64(mem); - fprintf(fp, "# total memory : %"PRIu64" kB\n", mem); - return; + 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: - fprintf(fp, "# total memory : unknown\n"); + strbuf_release(&sb); + return -1; } -static void print_numa_topology(struct perf_header *h __used, int fd, FILE *fp) +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, c, i; + 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 = read(fd, &nr, sizeof(nr)); - if (ret != (ssize_t)sizeof(nr)) + ret = readn(fd, &nr, sizeof(nr)); + if (ret != sizeof(nr)) goto error; - if (h->needs_swap) + if (ph->needs_swap) nr = bswap_32(nr); - for (i = 0; i < nr; i++) { + ph->env.nr_numa_nodes = nr; + strbuf_init(&sb, 256); + for (i = 0; i < nr; i++) { /* node number */ - ret = read(fd, &c, sizeof(c)); - if (ret != (ssize_t)sizeof(c)) + ret = readn(fd, &node, sizeof(node)); + if (ret != sizeof(node)) goto error; - if (h->needs_swap) - c = bswap_32(c); - - ret = read(fd, &mem_total, sizeof(u64)); + ret = readn(fd, &mem_total, sizeof(u64)); if (ret != sizeof(u64)) goto error; - ret = read(fd, &mem_free, sizeof(u64)); + ret = readn(fd, &mem_free, sizeof(u64)); if (ret != sizeof(u64)) goto error; - if (h->needs_swap) { + if (ph->needs_swap) { + node = bswap_32(node); mem_total = bswap_64(mem_total); mem_free = bswap_64(mem_free); } - fprintf(fp, "# node%u meminfo : total = %"PRIu64" kB," - " free = %"PRIu64" kB\n", - c, - mem_total, - mem_free); + strbuf_addf(&sb, "%u:%"PRIu64":%"PRIu64":", + node, mem_total, mem_free); - str = do_read_string(fd, h); - fprintf(fp, "# node%u cpu list : %s\n", c, str); + 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); } - return; + ph->env.numa_nodes = strbuf_detach(&sb, NULL); + return 0; + error: - fprintf(fp, "# numa topology : not available\n"); + 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 void print_cpuid(struct perf_header *ph, int fd, FILE *fp) +static int process_group_desc(struct perf_file_section *section __maybe_unused, + struct perf_header *ph, int fd, + void *data __maybe_unused) { - char *str = do_read_string(fd, ph); - fprintf(fp, "# cpuid : %s\n", str); - free(str); + 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, .full_only = true } + [n] = { .name = #n, .write = write_##func, .print = print_##func, \ + .process = process_##func, .full_only = true } /* feature_ops not implemented: */ -#define print_trace_info NULL -#define print_build_id NULL +#define print_tracing_data NULL +#define print_build_id NULL static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = { - FEAT_OPA(HEADER_TRACE_INFO, trace_info), - FEAT_OPA(HEADER_BUILD_ID, build_id), - FEAT_OPA(HEADER_HOSTNAME, hostname), - FEAT_OPA(HEADER_OSRELEASE, osrelease), - FEAT_OPA(HEADER_VERSION, version), - FEAT_OPA(HEADER_ARCH, arch), - FEAT_OPA(HEADER_NRCPUS, nrcpus), - FEAT_OPA(HEADER_CPUDESC, cpudesc), - FEAT_OPA(HEADER_CPUID, cpuid), - FEAT_OPA(HEADER_TOTAL_MEM, total_mem), - FEAT_OPA(HEADER_EVENT_DESC, event_desc), - FEAT_OPA(HEADER_CMDLINE, cmdline), + 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 { @@ -1374,7 +2188,7 @@ 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 = session->fd; + int fd = perf_data_file__fd(session->file); hd.fp = fp; hd.full = full; @@ -1425,13 +2239,13 @@ static int perf_header__adds_write(struct perf_header *header, if (!nr_sections) return 0; - feat_sec = p = calloc(sizeof(*feat_sec), nr_sections); + 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->data_offset + header->data_size; + sec_start = header->feat_offset; lseek(fd, sec_start + sec_size, SEEK_SET); for_each_set_bit(feat, header->adds_features, HEADER_FEAT_BITS) { @@ -1477,39 +2291,29 @@ int perf_session__write_header(struct perf_session *session, struct perf_file_header f_header; struct perf_file_attr f_attr; struct perf_header *header = &session->header; - struct perf_evsel *attr, *pair = NULL; + struct perf_evsel *evsel; + u64 attr_offset; int err; lseek(fd, sizeof(f_header), SEEK_SET); - if (session->evlist != evlist) - pair = list_entry(session->evlist->entries.next, struct perf_evsel, node); - - list_for_each_entry(attr, &evlist->entries, node) { - attr->id_offset = lseek(fd, 0, SEEK_CUR); - err = do_write(fd, attr->id, attr->ids * sizeof(u64)); + 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) { -out_err_write: pr_debug("failed to write perf header\n"); return err; } - if (session->evlist != evlist) { - err = do_write(fd, pair->id, pair->ids * sizeof(u64)); - if (err < 0) - goto out_err_write; - attr->ids += pair->ids; - pair = list_entry(pair->node.next, struct perf_evsel, node); - } } - header->attr_offset = lseek(fd, 0, SEEK_CUR); + attr_offset = lseek(fd, 0, SEEK_CUR); - list_for_each_entry(attr, &evlist->entries, node) { + evlist__for_each(evlist, evsel) { f_attr = (struct perf_file_attr){ - .attr = attr->attr, + .attr = evsel->attr, .ids = { - .offset = attr->id_offset, - .size = attr->ids * sizeof(u64), + .offset = evsel->id_offset, + .size = evsel->ids * sizeof(u64), } }; err = do_write(fd, &f_attr, sizeof(f_attr)); @@ -1519,17 +2323,9 @@ out_err_write: } } - header->event_offset = lseek(fd, 0, SEEK_CUR); - header->event_size = event_count * sizeof(struct perf_trace_event_type); - if (events) { - err = do_write(fd, events, header->event_size); - if (err < 0) { - pr_debug("failed to write perf header events\n"); - return err; - } - } - - header->data_offset = lseek(fd, 0, SEEK_CUR); + 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); @@ -1542,17 +2338,14 @@ out_err_write: .size = sizeof(f_header), .attr_size = sizeof(f_attr), .attrs = { - .offset = header->attr_offset, + .offset = attr_offset, .size = evlist->nr_entries * sizeof(f_attr), }, .data = { .offset = header->data_offset, .size = header->data_size, }, - .event_types = { - .offset = header->event_offset, - .size = header->event_size, - }, + /* event_types is ignored, store zeros */ }; memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features)); @@ -1565,7 +2358,6 @@ out_err_write: } lseek(fd, header->data_offset + header->data_size, SEEK_SET); - header->frozen = 1; return 0; } @@ -1597,13 +2389,13 @@ int perf_header__process_sections(struct perf_header *header, int fd, if (!nr_sections) return 0; - feat_sec = sec = calloc(sizeof(*feat_sec), nr_sections); + feat_sec = sec = calloc(nr_sections, sizeof(*feat_sec)); if (!feat_sec) return -1; sec_size = sizeof(*feat_sec) * nr_sections; - lseek(fd, header->data_offset + header->data_size, SEEK_SET); + lseek(fd, header->feat_offset, SEEK_SET); err = perf_header__getbuffer64(header, fd, feat_sec, sec_size); if (err < 0) @@ -1620,24 +2412,142 @@ out_free: 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); - if (readn(fd, header, sizeof(*header)) <= 0 || - memcmp(&header->magic, __perf_magic, sizeof(header->magic))) + ret = readn(fd, header, sizeof(*header)); + if (ret <= 0) return -1; - if (header->attr_size != sizeof(struct perf_file_attr)) { - u64 attr_size = bswap_64(header->attr_size); - - if (attr_size != sizeof(struct perf_file_attr)) - 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)); - ph->needs_swap = true; + adds_features)); } if (header->size != sizeof(*header)) { @@ -1647,7 +2557,6 @@ int perf_file_header__read(struct perf_file_header *header, else return -1; } else if (ph->needs_swap) { - unsigned int i; /* * feature bitmap is declared as an array of unsigned longs -- * not good since its size can differ between the host that @@ -1663,14 +2572,17 @@ int perf_file_header__read(struct perf_file_header *header, * file), punt and fallback to the original behavior -- * clearing all feature bits and setting buildid. */ - for (i = 0; i < BITS_TO_LONGS(HEADER_FEAT_BITS); ++i) - header->adds_features[i] = bswap_64(header->adds_features[i]); + mem_bswap_64(&header->adds_features, + BITS_TO_U64(HEADER_FEAT_BITS)); if (!test_bit(HEADER_HOSTNAME, header->adds_features)) { - for (i = 0; i < BITS_TO_LONGS(HEADER_FEAT_BITS); ++i) { - header->adds_features[i] = bswap_64(header->adds_features[i]); - header->adds_features[i] = bswap_32(header->adds_features[i]); - } + /* 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)) { @@ -1682,270 +2594,214 @@ int perf_file_header__read(struct perf_file_header *header, memcpy(&ph->adds_features, &header->adds_features, sizeof(ph->adds_features)); - ph->event_offset = header->event_types.offset; - ph->event_size = header->event_types.size; 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 __event_process_build_id(struct build_id_event *bev, - char *filename, - struct perf_session *session) +static int perf_file_section__process(struct perf_file_section *section, + struct perf_header *ph, + int feat, int fd, void *data) { - int err = -1; - struct list_head *head; - 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; - head = &machine->kernel_dsos; - break; - case PERF_RECORD_MISC_GUEST_KERNEL: - dso_type = DSO_TYPE_GUEST_KERNEL; - head = &machine->kernel_dsos; - break; - case PERF_RECORD_MISC_USER: - case PERF_RECORD_MISC_GUEST_USER: - dso_type = DSO_TYPE_USER; - head = &machine->user_dsos; - break; - default: - goto out; + 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; } - dso = __dsos__findnew(head, 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); + if (feat >= HEADER_LAST_FEATURE) { + pr_debug("unknown feature %d, continuing...\n", feat); + return 0; } - err = 0; -out: - return err; + if (!feat_ops[feat].process) + return 0; + + return feat_ops[feat].process(section, ph, fd, data); } -static int perf_header__read_build_ids_abi_quirk(struct perf_header *header, - int input, u64 offset, u64 size) +static int perf_file_header__read_pipe(struct perf_pipe_file_header *header, + struct perf_header *ph, int fd, + bool repipe) { - struct perf_session *session = container_of(header, struct perf_session, header); - struct { - struct perf_event_header header; - u8 build_id[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; + ssize_t ret; - if (read(input, &old_bev, sizeof(old_bev)) != sizeof(old_bev)) - return -1; + ret = readn(fd, header, sizeof(*header)); + if (ret <= 0) + return -1; - if (header->needs_swap) - perf_event_header__bswap(&old_bev.header); + if (check_magic_endian(header->magic, header->size, true, ph) < 0) { + pr_debug("endian/magic failed\n"); + return -1; + } - len = old_bev.header.size - sizeof(old_bev); - if (read(input, filename, len) != len) - return -1; + if (ph->needs_swap) + header->size = bswap_64(header->size); - bev.header = old_bev.header; + if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0) + return -1; - /* - * 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; + return 0; +} - memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id)); - __event_process_build_id(&bev, filename, session); +static int perf_header__read_pipe(struct perf_session *session) +{ + struct perf_header *header = &session->header; + struct perf_pipe_file_header f_header; - offset += bev.header.size; + 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 perf_header__read_build_ids(struct perf_header *header, - int input, u64 offset, u64 size) +static int read_attr(int fd, struct perf_header *ph, + struct perf_file_attr *f_attr) { - 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; + struct perf_event_attr *attr = &f_attr->attr; + size_t sz, left; + size_t our_sz = sizeof(f_attr->attr); + ssize_t ret; - while (offset < limit) { - ssize_t len; + memset(f_attr, 0, sizeof(*f_attr)); - if (read(input, &bev, sizeof(bev)) != sizeof(bev)) - goto out; + /* 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; + } - if (header->needs_swap) - perf_event_header__bswap(&bev.header); + /* on file perf_event_attr size */ + sz = attr->size; - len = bev.header.size - sizeof(bev); - if (read(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); - } + if (ph->needs_swap) + sz = bswap_32(sz); - __event_process_build_id(&bev, filename, session); + 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; - offset += bev.header.size; + ret = readn(fd, ptr, left); } - err = 0; -out: - return err; + /* 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_file_section__process(struct perf_file_section *section, - struct perf_header *ph, - int feat, int fd, void *data __used) +static int perf_evsel__prepare_tracepoint_event(struct perf_evsel *evsel, + struct pevent *pevent) { - 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; - } + struct event_format *event; + char bf[128]; - if (feat >= HEADER_LAST_FEATURE) { - pr_debug("unknown feature %d, continuing...\n", feat); + /* already prepared */ + if (evsel->tp_format) return 0; - } - - switch (feat) { - case HEADER_TRACE_INFO: - trace_report(fd, false); - break; - case HEADER_BUILD_ID: - if (perf_header__read_build_ids(ph, fd, section->offset, section->size)) - pr_debug("Failed to read buildids, continuing...\n"); - break; - default: - break; - } - return 0; -} - -static int perf_file_header__read_pipe(struct perf_pipe_file_header *header, - struct perf_header *ph, int fd, - bool repipe) -{ - if (readn(fd, header, sizeof(*header)) <= 0 || - memcmp(&header->magic, __perf_magic, sizeof(header->magic))) + if (pevent == NULL) { + pr_debug("broken or missing trace data\n"); return -1; + } - if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0) + event = pevent_find_event(pevent, evsel->attr.config); + if (event == NULL) return -1; - if (header->size != sizeof(*header)) { - u64 size = bswap_64(header->size); - - if (size != sizeof(*header)) + if (!evsel->name) { + snprintf(bf, sizeof(bf), "%s:%s", event->system, event->name); + evsel->name = strdup(bf); + if (evsel->name == NULL) return -1; - - ph->needs_swap = true; } + evsel->tp_format = event; return 0; } -static int perf_header__read_pipe(struct perf_session *session, int fd) +static int perf_evlist__prepare_tracepoint_events(struct perf_evlist *evlist, + struct pevent *pevent) { - struct perf_header *header = &session->header; - struct perf_pipe_file_header f_header; + struct perf_evsel *pos; - if (perf_file_header__read_pipe(&f_header, header, fd, - session->repipe) < 0) { - pr_debug("incompatible file format\n"); - return -EINVAL; + evlist__for_each(evlist, pos) { + if (pos->attr.type == PERF_TYPE_TRACEPOINT && + perf_evsel__prepare_tracepoint_event(pos, pevent)) + return -1; } - session->fd = fd; - return 0; } -int perf_session__read_header(struct perf_session *session, int fd) +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(NULL, NULL); + session->evlist = perf_evlist__new(); if (session->evlist == NULL) return -ENOMEM; - if (session->fd_pipe) - return perf_header__read_pipe(session, fd); + if (perf_data_file__is_pipe(file)) + return perf_header__read_pipe(session); - if (perf_file_header__read(&f_header, header, fd) < 0) { - pr_debug("incompatible file format\n"); + 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 / sizeof(f_attr); + 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 (readn(fd, &f_attr, sizeof(f_attr)) <= 0) + 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, i); + 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(). @@ -1975,23 +2831,13 @@ int perf_session__read_header(struct perf_session *session, int fd) symbol_conf.nr_events = nr_attrs; - if (f_header.event_types.size) { - lseek(fd, f_header.event_types.offset, SEEK_SET); - events = malloc(f_header.event_types.size); - if (events == NULL) - return -ENOMEM; - if (perf_header__getbuffer64(header, fd, events, - f_header.event_types.size)) - goto out_errno; - event_count = f_header.event_types.size / sizeof(struct perf_trace_event_type); - } - - perf_header__process_sections(header, fd, NULL, + perf_header__process_sections(header, fd, &session->tevent, perf_file_section__process); - lseek(fd, header->data_offset, SEEK_SET); + if (perf_evlist__prepare_tracepoint_events(session->evlist, + session->tevent.pevent)) + goto out_delete_evlist; - header->frozen = 1; return 0; out_errno: return -errno; @@ -2003,7 +2849,7 @@ out_delete_evlist: } int perf_event__synthesize_attr(struct perf_tool *tool, - struct perf_event_attr *attr, u16 ids, u64 *id, + struct perf_event_attr *attr, u32 ids, u64 *id, perf_event__handler_t process) { union perf_event *ev; @@ -2011,7 +2857,7 @@ int perf_event__synthesize_attr(struct perf_tool *tool, int err; size = sizeof(struct perf_event_attr); - size = ALIGN(size, sizeof(u64)); + size = PERF_ALIGN(size, sizeof(u64)); size += sizeof(struct perf_event_header); size += ids * sizeof(u64); @@ -2024,9 +2870,12 @@ int perf_event__synthesize_attr(struct perf_tool *tool, memcpy(ev->attr.id, id, ids * sizeof(u64)); ev->attr.header.type = PERF_RECORD_HEADER_ATTR; - ev->attr.header.size = size; + ev->attr.header.size = (u16)size; - err = process(tool, ev, NULL, NULL); + if (ev->attr.header.size == size) + err = process(tool, ev, NULL, NULL); + else + err = -E2BIG; free(ev); @@ -2037,12 +2886,12 @@ int perf_event__synthesize_attrs(struct perf_tool *tool, struct perf_session *session, perf_event__handler_t process) { - struct perf_evsel *attr; + struct perf_evsel *evsel; int err = 0; - list_for_each_entry(attr, &session->evlist->entries, node) { - err = perf_event__synthesize_attr(tool, &attr->attr, attr->ids, - attr->id, process); + 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; @@ -2052,20 +2901,21 @@ int perf_event__synthesize_attrs(struct perf_tool *tool, return err; } -int perf_event__process_attr(union perf_event *event, +int perf_event__process_attr(struct perf_tool *tool __maybe_unused, + union perf_event *event, struct perf_evlist **pevlist) { - unsigned int i, ids, n_ids; + u32 i, ids, n_ids; struct perf_evsel *evsel; struct perf_evlist *evlist = *pevlist; if (evlist == NULL) { - *pevlist = evlist = perf_evlist__new(NULL, NULL); + *pevlist = evlist = perf_evlist__new(); if (evlist == NULL) return -ENOMEM; } - evsel = perf_evsel__new(&event->attr.attr, evlist->nr_entries); + evsel = perf_evsel__new(&event->attr.attr); if (evsel == NULL) return -ENOMEM; @@ -2086,63 +2936,7 @@ int perf_event__process_attr(union perf_event *event, perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]); } - return 0; -} - -int perf_event__synthesize_event_type(struct perf_tool *tool, - u64 event_id, char *name, - perf_event__handler_t process, - struct machine *machine) -{ - union perf_event ev; - size_t size = 0; - int err = 0; - - memset(&ev, 0, sizeof(ev)); - - ev.event_type.event_type.event_id = event_id; - memset(ev.event_type.event_type.name, 0, MAX_EVENT_NAME); - strncpy(ev.event_type.event_type.name, name, MAX_EVENT_NAME - 1); - - ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE; - size = strlen(ev.event_type.event_type.name); - size = ALIGN(size, sizeof(u64)); - ev.event_type.header.size = sizeof(ev.event_type) - - (sizeof(ev.event_type.event_type.name) - size); - - err = process(tool, &ev, NULL, machine); - - return err; -} - -int perf_event__synthesize_event_types(struct perf_tool *tool, - perf_event__handler_t process, - struct machine *machine) -{ - struct perf_trace_event_type *type; - int i, err = 0; - - for (i = 0; i < event_count; i++) { - type = &events[i]; - - err = perf_event__synthesize_event_type(tool, type->event_id, - type->name, process, - machine); - if (err) { - pr_debug("failed to create perf header event type\n"); - return err; - } - } - - return err; -} - -int perf_event__process_event_type(struct perf_tool *tool __unused, - union perf_event *event) -{ - if (perf_header__push_event(event->event_type.event_type.event_id, - event->event_type.event_type.name) < 0) - return -ENOMEM; + symbol_conf.nr_events = evlist->nr_entries; return 0; } @@ -2154,7 +2948,7 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, union perf_event ev; struct tracing_data *tdata; ssize_t size = 0, aligned_size = 0, padding; - int err __used = 0; + int err __maybe_unused = 0; /* * We are going to store the size of the data followed @@ -2175,7 +2969,7 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA; size = tdata->size; - aligned_size = ALIGN(size, sizeof(u64)); + 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; @@ -2193,31 +2987,42 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, return aligned_size; } -int perf_event__process_tracing_data(union perf_event *event, +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; - off_t offset = lseek(session->fd, 0, SEEK_CUR); + 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(session->fd, offset + sizeof(struct tracing_data_event), + lseek(fd, offset + sizeof(struct tracing_data_event), SEEK_SET); - size_read = trace_report(session->fd, session->repipe); - - padding = ALIGN(size_read, sizeof(u64)) - size_read; + size_read = trace_report(fd, &session->tevent, + session->repipe); + padding = PERF_ALIGN(size_read, sizeof(u64)) - size_read; - if (read(session->fd, buf, padding) < 0) - die("reading input file"); + 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) - die("repiping tracing data 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; } - if (size_read + padding != size) - die("tracing data size mismatch"); + perf_evlist__prepare_tracepoint_events(session->evlist, + session->tevent.pevent); return size_read + padding; } @@ -2237,7 +3042,7 @@ int perf_event__synthesize_build_id(struct perf_tool *tool, memset(&ev, 0, sizeof(ev)); len = pos->long_name_len + 1; - len = ALIGN(len, NAME_ALIGN); + 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; @@ -2250,7 +3055,7 @@ int perf_event__synthesize_build_id(struct perf_tool *tool, return err; } -int perf_event__process_build_id(struct perf_tool *tool __used, +int perf_event__process_build_id(struct perf_tool *tool __maybe_unused, union perf_event *event, struct perf_session *session) { |