| #define _FILE_OFFSET_BITS 64 |
| |
| #include <sys/types.h> |
| #include <byteswap.h> |
| #include <unistd.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <linux/list.h> |
| #include <linux/kernel.h> |
| |
| #include "util.h" |
| #include "header.h" |
| #include "../perf.h" |
| #include "trace-event.h" |
| #include "session.h" |
| #include "symbol.h" |
| #include "debug.h" |
| |
| static bool no_buildid_cache = false; |
| |
| /* |
| * Create new perf.data header attribute: |
| */ |
| struct perf_header_attr *perf_header_attr__new(struct perf_event_attr *attr) |
| { |
| struct perf_header_attr *self = malloc(sizeof(*self)); |
| |
| if (self != NULL) { |
| self->attr = *attr; |
| self->ids = 0; |
| self->size = 1; |
| self->id = malloc(sizeof(u64)); |
| if (self->id == NULL) { |
| free(self); |
| self = NULL; |
| } |
| } |
| |
| return self; |
| } |
| |
| void perf_header_attr__delete(struct perf_header_attr *self) |
| { |
| free(self->id); |
| free(self); |
| } |
| |
| int perf_header_attr__add_id(struct perf_header_attr *self, u64 id) |
| { |
| int pos = self->ids; |
| |
| self->ids++; |
| if (self->ids > self->size) { |
| int nsize = self->size * 2; |
| u64 *nid = realloc(self->id, nsize * sizeof(u64)); |
| |
| if (nid == NULL) |
| return -1; |
| |
| self->size = nsize; |
| self->id = nid; |
| } |
| self->id[pos] = id; |
| return 0; |
| } |
| |
| int perf_header__init(struct perf_header *self) |
| { |
| self->size = 1; |
| self->attr = malloc(sizeof(void *)); |
| return self->attr == NULL ? -ENOMEM : 0; |
| } |
| |
| void perf_header__exit(struct perf_header *self) |
| { |
| int i; |
| for (i = 0; i < self->attrs; ++i) |
| perf_header_attr__delete(self->attr[i]); |
| free(self->attr); |
| } |
| |
| int perf_header__add_attr(struct perf_header *self, |
| struct perf_header_attr *attr) |
| { |
| if (self->frozen) |
| return -1; |
| |
| if (self->attrs == self->size) { |
| int nsize = self->size * 2; |
| struct perf_header_attr **nattr; |
| |
| nattr = realloc(self->attr, nsize * sizeof(void *)); |
| if (nattr == NULL) |
| return -1; |
| |
| self->size = nsize; |
| self->attr = nattr; |
| } |
| |
| self->attr[self->attrs++] = attr; |
| return 0; |
| } |
| |
| static int event_count; |
| static struct perf_trace_event_type *events; |
| |
| 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"; |
| |
| #define PERF_MAGIC (*(u64 *)__perf_magic) |
| |
| struct perf_file_attr { |
| struct perf_event_attr attr; |
| struct perf_file_section ids; |
| }; |
| |
| void perf_header__set_feat(struct perf_header *self, int feat) |
| { |
| set_bit(feat, self->adds_features); |
| } |
| |
| void perf_header__clear_feat(struct perf_header *self, int feat) |
| { |
| clear_bit(feat, self->adds_features); |
| } |
| |
| bool perf_header__has_feat(const struct perf_header *self, int feat) |
| { |
| return test_bit(feat, self->adds_features); |
| } |
| |
| static int do_write(int fd, const void *buf, size_t size) |
| { |
| while (size) { |
| int ret = write(fd, buf, size); |
| |
| if (ret < 0) |
| return -errno; |
| |
| size -= ret; |
| buf += ret; |
| } |
| |
| return 0; |
| } |
| |
| #define NAME_ALIGN 64 |
| |
| static int write_padded(int fd, const void *bf, size_t count, |
| size_t count_aligned) |
| { |
| static const char zero_buf[NAME_ALIGN]; |
| int err = do_write(fd, bf, count); |
| |
| if (!err) |
| err = do_write(fd, zero_buf, count_aligned - count); |
| |
| return err; |
| } |
| |
| #define dsos__for_each_with_build_id(pos, head) \ |
| list_for_each_entry(pos, head, node) \ |
| if (!pos->has_build_id) \ |
| continue; \ |
| else |
| |
| static int __dsos__write_buildid_table(struct list_head *head, pid_t pid, |
| u16 misc, int fd) |
| { |
| struct dso *pos; |
| |
| dsos__for_each_with_build_id(pos, head) { |
| int err; |
| struct build_id_event b; |
| size_t 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) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int machine__write_buildid_table(struct machine *self, int fd) |
| { |
| int err; |
| u16 kmisc = PERF_RECORD_MISC_KERNEL, |
| umisc = PERF_RECORD_MISC_USER; |
| |
| if (!machine__is_host(self)) { |
| kmisc = PERF_RECORD_MISC_GUEST_KERNEL; |
| umisc = PERF_RECORD_MISC_GUEST_USER; |
| } |
| |
| err = __dsos__write_buildid_table(&self->kernel_dsos, self->pid, |
| kmisc, fd); |
| if (err == 0) |
| err = __dsos__write_buildid_table(&self->user_dsos, |
| self->pid, umisc, fd); |
| return err; |
| } |
| |
| 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); |
| |
| if (err) |
| return err; |
| |
| for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) { |
| struct machine *pos = rb_entry(nd, struct machine, rb_node); |
| err = machine__write_buildid_table(pos, fd); |
| if (err) |
| break; |
| } |
| return err; |
| } |
| |
| int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, |
| const char *name, bool is_kallsyms) |
| { |
| const size_t size = PATH_MAX; |
| char *filename = malloc(size), |
| *linkname = malloc(size), *targetname; |
| int len, err = -1; |
| |
| if (filename == NULL || linkname == NULL) |
| goto out_free; |
| |
| len = snprintf(filename, size, "%s%s%s", |
| debugdir, is_kallsyms ? "/" : "", name); |
| if (mkdir_p(filename, 0755)) |
| goto out_free; |
| |
| snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id); |
| |
| if (access(filename, F_OK)) { |
| if (is_kallsyms) { |
| if (copyfile("/proc/kallsyms", filename)) |
| goto out_free; |
| } else if (link(name, filename) && copyfile(name, filename)) |
| goto out_free; |
| } |
| |
| len = snprintf(linkname, size, "%s/.build-id/%.2s", |
| debugdir, sbuild_id); |
| |
| if (access(linkname, X_OK) && mkdir_p(linkname, 0755)) |
| goto out_free; |
| |
| snprintf(linkname + len, size - len, "/%s", sbuild_id + 2); |
| targetname = filename + strlen(debugdir) - 5; |
| memcpy(targetname, "../..", 5); |
| |
| if (symlink(targetname, linkname) == 0) |
| err = 0; |
| out_free: |
| free(filename); |
| free(linkname); |
| return err; |
| } |
| |
| static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size, |
| const char *name, const char *debugdir, |
| bool is_kallsyms) |
| { |
| 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); |
| } |
| |
| int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir) |
| { |
| const size_t size = PATH_MAX; |
| char *filename = malloc(size), |
| *linkname = malloc(size); |
| int err = -1; |
| |
| if (filename == NULL || linkname == NULL) |
| goto out_free; |
| |
| snprintf(linkname, size, "%s/.build-id/%.2s/%s", |
| debugdir, sbuild_id, sbuild_id + 2); |
| |
| if (access(linkname, F_OK)) |
| goto out_free; |
| |
| if (readlink(linkname, filename, size) < 0) |
| goto out_free; |
| |
| if (unlink(linkname)) |
| goto out_free; |
| |
| /* |
| * Since the link is relative, we must make it absolute: |
| */ |
| snprintf(linkname, size, "%s/.build-id/%.2s/%s", |
| debugdir, sbuild_id, filename); |
| |
| if (unlink(linkname)) |
| goto out_free; |
| |
| err = 0; |
| out_free: |
| free(filename); |
| free(linkname); |
| return err; |
| } |
| |
| static int dso__cache_build_id(struct dso *self, const char *debugdir) |
| { |
| bool is_kallsyms = self->kernel && self->long_name[0] != '/'; |
| |
| return build_id_cache__add_b(self->build_id, sizeof(self->build_id), |
| self->long_name, debugdir, is_kallsyms); |
| } |
| |
| static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir) |
| { |
| struct dso *pos; |
| int err = 0; |
| |
| dsos__for_each_with_build_id(pos, head) |
| if (dso__cache_build_id(pos, debugdir)) |
| err = -1; |
| |
| return err; |
| } |
| |
| static int machine__cache_build_ids(struct machine *self, const char *debugdir) |
| { |
| int ret = __dsos__cache_build_ids(&self->kernel_dsos, debugdir); |
| ret |= __dsos__cache_build_ids(&self->user_dsos, debugdir); |
| return ret; |
| } |
| |
| static int perf_session__cache_build_ids(struct perf_session *self) |
| { |
| struct rb_node *nd; |
| int ret; |
| char debugdir[PATH_MAX]; |
| |
| snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir); |
| |
| if (mkdir(debugdir, 0755) != 0 && errno != EEXIST) |
| return -1; |
| |
| ret = machine__cache_build_ids(&self->host_machine, debugdir); |
| |
| for (nd = rb_first(&self->machines); nd; nd = rb_next(nd)) { |
| struct machine *pos = rb_entry(nd, struct machine, rb_node); |
| ret |= machine__cache_build_ids(pos, debugdir); |
| } |
| return ret ? -1 : 0; |
| } |
| |
| static bool machine__read_build_ids(struct machine *self, bool with_hits) |
| { |
| bool ret = __dsos__read_build_ids(&self->kernel_dsos, with_hits); |
| ret |= __dsos__read_build_ids(&self->user_dsos, with_hits); |
| return ret; |
| } |
| |
| static bool perf_session__read_build_ids(struct perf_session *self, bool with_hits) |
| { |
| struct rb_node *nd; |
| bool ret = machine__read_build_ids(&self->host_machine, with_hits); |
| |
| for (nd = rb_first(&self->machines); nd; nd = rb_next(nd)) { |
| struct machine *pos = rb_entry(nd, struct machine, rb_node); |
| ret |= machine__read_build_ids(pos, with_hits); |
| } |
| |
| return ret; |
| } |
| |
| static int perf_header__adds_write(struct perf_header *self, int fd) |
| { |
| int nr_sections; |
| struct perf_session *session; |
| struct perf_file_section *feat_sec; |
| int sec_size; |
| u64 sec_start; |
| int idx = 0, err; |
| |
| session = container_of(self, struct perf_session, header); |
| |
| if (perf_header__has_feat(self, HEADER_BUILD_ID && |
| !perf_session__read_build_ids(session, true))) |
| perf_header__clear_feat(self, HEADER_BUILD_ID); |
| |
| nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS); |
| if (!nr_sections) |
| return 0; |
| |
| feat_sec = calloc(sizeof(*feat_sec), nr_sections); |
| if (feat_sec == NULL) |
| return -ENOMEM; |
| |
| sec_size = sizeof(*feat_sec) * nr_sections; |
| |
| sec_start = self->data_offset + self->data_size; |
| lseek(fd, sec_start + sec_size, SEEK_SET); |
| |
| if (perf_header__has_feat(self, HEADER_TRACE_INFO)) { |
| struct perf_file_section *trace_sec; |
| |
| trace_sec = &feat_sec[idx++]; |
| |
| /* Write trace info */ |
| trace_sec->offset = lseek(fd, 0, SEEK_CUR); |
| read_tracing_data(fd, &evsel_list); |
| trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset; |
| } |
| |
| if (perf_header__has_feat(self, HEADER_BUILD_ID)) { |
| struct perf_file_section *buildid_sec; |
| |
| buildid_sec = &feat_sec[idx++]; |
| |
| /* Write build-ids */ |
| buildid_sec->offset = lseek(fd, 0, SEEK_CUR); |
| err = dsos__write_buildid_table(self, fd); |
| if (err < 0) { |
| pr_debug("failed to write buildid table\n"); |
| goto out_free; |
| } |
| buildid_sec->size = lseek(fd, 0, SEEK_CUR) - |
| buildid_sec->offset; |
| if (!no_buildid_cache) |
| perf_session__cache_build_ids(session); |
| } |
| |
| lseek(fd, sec_start, SEEK_SET); |
| err = do_write(fd, feat_sec, sec_size); |
| if (err < 0) |
| pr_debug("failed to write feature section\n"); |
| out_free: |
| free(feat_sec); |
| return err; |
| } |
| |
| int perf_header__write_pipe(int fd) |
| { |
| struct perf_pipe_file_header f_header; |
| int err; |
| |
| f_header = (struct perf_pipe_file_header){ |
| .magic = PERF_MAGIC, |
| .size = sizeof(f_header), |
| }; |
| |
| err = do_write(fd, &f_header, sizeof(f_header)); |
| if (err < 0) { |
| pr_debug("failed to write perf pipe header\n"); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| int perf_header__write(struct perf_header *self, int fd, bool at_exit) |
| { |
| struct perf_file_header f_header; |
| struct perf_file_attr f_attr; |
| struct perf_header_attr *attr; |
| int i, err; |
| |
| lseek(fd, sizeof(f_header), SEEK_SET); |
| |
| for (i = 0; i < self->attrs; i++) { |
| attr = self->attr[i]; |
| |
| attr->id_offset = lseek(fd, 0, SEEK_CUR); |
| err = do_write(fd, attr->id, attr->ids * sizeof(u64)); |
| if (err < 0) { |
| pr_debug("failed to write perf header\n"); |
| return err; |
| } |
| } |
| |
| |
| self->attr_offset = lseek(fd, 0, SEEK_CUR); |
| |
| for (i = 0; i < self->attrs; i++) { |
| attr = self->attr[i]; |
| |
| f_attr = (struct perf_file_attr){ |
| .attr = attr->attr, |
| .ids = { |
| .offset = attr->id_offset, |
| .size = attr->ids * sizeof(u64), |
| } |
| }; |
| err = do_write(fd, &f_attr, sizeof(f_attr)); |
| if (err < 0) { |
| pr_debug("failed to write perf header attribute\n"); |
| return err; |
| } |
| } |
| |
| self->event_offset = lseek(fd, 0, SEEK_CUR); |
| self->event_size = event_count * sizeof(struct perf_trace_event_type); |
| if (events) { |
| err = do_write(fd, events, self->event_size); |
| if (err < 0) { |
| pr_debug("failed to write perf header events\n"); |
| return err; |
| } |
| } |
| |
| self->data_offset = lseek(fd, 0, SEEK_CUR); |
| |
| if (at_exit) { |
| err = perf_header__adds_write(self, 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 = self->attr_offset, |
| .size = self->attrs * sizeof(f_attr), |
| }, |
| .data = { |
| .offset = self->data_offset, |
| .size = self->data_size, |
| }, |
| .event_types = { |
| .offset = self->event_offset, |
| .size = self->event_size, |
| }, |
| }; |
| |
| memcpy(&f_header.adds_features, &self->adds_features, sizeof(self->adds_features)); |
| |
| lseek(fd, 0, SEEK_SET); |
| err = do_write(fd, &f_header, sizeof(f_header)); |
| if (err < 0) { |
| pr_debug("failed to write perf header\n"); |
| return err; |
| } |
| lseek(fd, self->data_offset + self->data_size, SEEK_SET); |
| |
| self->frozen = 1; |
| return 0; |
| } |
| |
| static int perf_header__getbuffer64(struct perf_header *self, |
| int fd, void *buf, size_t size) |
| { |
| if (readn(fd, buf, size) <= 0) |
| return -1; |
| |
| if (self->needs_swap) |
| mem_bswap_64(buf, size); |
| |
| return 0; |
| } |
| |
| int perf_header__process_sections(struct perf_header *self, int fd, |
| int (*process)(struct perf_file_section *self, |
| struct perf_header *ph, |
| int feat, int fd)) |
| { |
| struct perf_file_section *feat_sec; |
| int nr_sections; |
| int sec_size; |
| int idx = 0; |
| int err = -1, feat = 1; |
| |
| nr_sections = bitmap_weight(self->adds_features, HEADER_FEAT_BITS); |
| if (!nr_sections) |
| return 0; |
| |
| feat_sec = calloc(sizeof(*feat_sec), nr_sections); |
| if (!feat_sec) |
| return -1; |
| |
| sec_size = sizeof(*feat_sec) * nr_sections; |
| |
| lseek(fd, self->data_offset + self->data_size, SEEK_SET); |
| |
| if (perf_header__getbuffer64(self, fd, feat_sec, sec_size)) |
| goto out_free; |
| |
| err = 0; |
| while (idx < nr_sections && feat < HEADER_LAST_FEATURE) { |
| if (perf_header__has_feat(self, feat)) { |
| struct perf_file_section *sec = &feat_sec[idx++]; |
| |
| err = process(sec, self, feat, fd); |
| if (err < 0) |
| break; |
| } |
| ++feat; |
| } |
| out_free: |
| free(feat_sec); |
| return err; |
| } |
| |
| int perf_file_header__read(struct perf_file_header *self, |
| struct perf_header *ph, int fd) |
| { |
| lseek(fd, 0, SEEK_SET); |
| |
| if (readn(fd, self, sizeof(*self)) <= 0 || |
| memcmp(&self->magic, __perf_magic, sizeof(self->magic))) |
| return -1; |
| |
| if (self->attr_size != sizeof(struct perf_file_attr)) { |
| u64 attr_size = bswap_64(self->attr_size); |
| |
| if (attr_size != sizeof(struct perf_file_attr)) |
| return -1; |
| |
| mem_bswap_64(self, offsetof(struct perf_file_header, |
| adds_features)); |
| ph->needs_swap = true; |
| } |
| |
| if (self->size != sizeof(*self)) { |
| /* Support the previous format */ |
| if (self->size == offsetof(typeof(*self), adds_features)) |
| bitmap_zero(self->adds_features, HEADER_FEAT_BITS); |
| else |
| return -1; |
| } |
| |
| memcpy(&ph->adds_features, &self->adds_features, |
| sizeof(ph->adds_features)); |
| /* |
| * FIXME: hack that assumes that if we need swap the perf.data file |
| * may be coming from an arch with a different word-size, ergo different |
| * DEFINE_BITMAP format, investigate more later, but for now its mostly |
| * safe to assume that we have a build-id section. Trace files probably |
| * have several other issues in this realm anyway... |
| */ |
| if (ph->needs_swap) { |
| memset(&ph->adds_features, 0, sizeof(ph->adds_features)); |
| perf_header__set_feat(ph, HEADER_BUILD_ID); |
| } |
| |
| ph->event_offset = self->event_types.offset; |
| ph->event_size = self->event_types.size; |
| ph->data_offset = self->data.offset; |
| ph->data_size = self->data.size; |
| return 0; |
| } |
| |
| 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(struct perf_header *self, |
| int input, u64 offset, u64 size) |
| { |
| struct perf_session *session = container_of(self, |
| struct perf_session, header); |
| struct build_id_event bev; |
| char filename[PATH_MAX]; |
| u64 limit = offset + size; |
| int err = -1; |
| |
| while (offset < limit) { |
| ssize_t len; |
| |
| if (read(input, &bev, sizeof(bev)) != sizeof(bev)) |
| goto out; |
| |
| if (self->needs_swap) |
| perf_event_header__bswap(&bev.header); |
| |
| len = bev.header.size - sizeof(bev); |
| if (read(input, filename, len) != len) |
| goto out; |
| |
| __event_process_build_id(&bev, filename, session); |
| |
| offset += bev.header.size; |
| } |
| err = 0; |
| out: |
| return err; |
| } |
| |
| static int perf_file_section__process(struct perf_file_section *self, |
| struct perf_header *ph, |
| int feat, int fd) |
| { |
| if (lseek(fd, self->offset, SEEK_SET) == (off_t)-1) { |
| pr_debug("Failed to lseek to %Ld offset for feature %d, " |
| "continuing...\n", self->offset, feat); |
| 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, self->offset, self->size)) |
| pr_debug("Failed to read buildids, continuing...\n"); |
| break; |
| default: |
| pr_debug("unknown feature %d, continuing...\n", feat); |
| } |
| |
| return 0; |
| } |
| |
| static int perf_file_header__read_pipe(struct perf_pipe_file_header *self, |
| struct perf_header *ph, int fd, |
| bool repipe) |
| { |
| if (readn(fd, self, sizeof(*self)) <= 0 || |
| memcmp(&self->magic, __perf_magic, sizeof(self->magic))) |
| return -1; |
| |
| if (repipe && do_write(STDOUT_FILENO, self, sizeof(*self)) < 0) |
| return -1; |
| |
| if (self->size != sizeof(*self)) { |
| u64 size = bswap_64(self->size); |
| |
| if (size != sizeof(*self)) |
| return -1; |
| |
| ph->needs_swap = true; |
| } |
| |
| return 0; |
| } |
| |
| static int perf_header__read_pipe(struct perf_session *session, int fd) |
| { |
| struct perf_header *self = &session->header; |
| struct perf_pipe_file_header f_header; |
| |
| if (perf_file_header__read_pipe(&f_header, self, fd, |
| session->repipe) < 0) { |
| pr_debug("incompatible file format\n"); |
| return -EINVAL; |
| } |
| |
| session->fd = fd; |
| |
| return 0; |
| } |
| |
| int perf_header__read(struct perf_session *session, int fd) |
| { |
| struct perf_header *self = &session->header; |
| struct perf_file_header f_header; |
| struct perf_file_attr f_attr; |
| u64 f_id; |
| int nr_attrs, nr_ids, i, j; |
| |
| if (session->fd_pipe) |
| return perf_header__read_pipe(session, fd); |
| |
| if (perf_file_header__read(&f_header, self, fd) < 0) { |
| pr_debug("incompatible file format\n"); |
| return -EINVAL; |
| } |
| |
| nr_attrs = f_header.attrs.size / sizeof(f_attr); |
| lseek(fd, f_header.attrs.offset, SEEK_SET); |
| |
| for (i = 0; i < nr_attrs; i++) { |
| struct perf_header_attr *attr; |
| off_t tmp; |
| |
| if (perf_header__getbuffer64(self, fd, &f_attr, sizeof(f_attr))) |
| goto out_errno; |
| |
| tmp = lseek(fd, 0, SEEK_CUR); |
| |
| attr = perf_header_attr__new(&f_attr.attr); |
| if (attr == NULL) |
| return -ENOMEM; |
| |
| nr_ids = f_attr.ids.size / sizeof(u64); |
| lseek(fd, f_attr.ids.offset, SEEK_SET); |
| |
| for (j = 0; j < nr_ids; j++) { |
| if (perf_header__getbuffer64(self, fd, &f_id, sizeof(f_id))) |
| goto out_errno; |
| |
| if (perf_header_attr__add_id(attr, f_id) < 0) { |
| perf_header_attr__delete(attr); |
| return -ENOMEM; |
| } |
| } |
| if (perf_header__add_attr(self, attr) < 0) { |
| perf_header_attr__delete(attr); |
| return -ENOMEM; |
| } |
| |
| lseek(fd, tmp, SEEK_SET); |
| } |
| |
| 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(self, 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(self, fd, perf_file_section__process); |
| |
| lseek(fd, self->data_offset, SEEK_SET); |
| |
| self->frozen = 1; |
| return 0; |
| out_errno: |
| return -errno; |
| } |
| |
| u64 perf_header__sample_type(struct perf_header *header) |
| { |
| u64 type = 0; |
| int i; |
| |
| for (i = 0; i < header->attrs; i++) { |
| struct perf_header_attr *attr = header->attr[i]; |
| |
| if (!type) |
| type = attr->attr.sample_type; |
| else if (type != attr->attr.sample_type) |
| die("non matching sample_type"); |
| } |
| |
| return type; |
| } |
| |
| bool perf_header__sample_id_all(const struct perf_header *header) |
| { |
| bool value = false, first = true; |
| int i; |
| |
| for (i = 0; i < header->attrs; i++) { |
| struct perf_header_attr *attr = header->attr[i]; |
| |
| if (first) { |
| value = attr->attr.sample_id_all; |
| first = false; |
| } else if (value != attr->attr.sample_id_all) |
| die("non matching sample_id_all"); |
| } |
| |
| return value; |
| } |
| |
| struct perf_event_attr * |
| perf_header__find_attr(u64 id, struct perf_header *header) |
| { |
| int i; |
| |
| /* |
| * We set id to -1 if the data file doesn't contain sample |
| * ids. This can happen when the data file contains one type |
| * of event and in that case, the header can still store the |
| * event attribute information. Check for this and avoid |
| * walking through the entire list of ids which may be large. |
| */ |
| if (id == -1ULL) { |
| if (header->attrs > 0) |
| return &header->attr[0]->attr; |
| return NULL; |
| } |
| |
| for (i = 0; i < header->attrs; i++) { |
| struct perf_header_attr *attr = header->attr[i]; |
| int j; |
| |
| for (j = 0; j < attr->ids; j++) { |
| if (attr->id[j] == id) |
| return &attr->attr; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| int event__synthesize_attr(struct perf_event_attr *attr, u16 ids, u64 *id, |
| event__handler_t process, |
| struct perf_session *session) |
| { |
| event_t *ev; |
| size_t size; |
| int err; |
| |
| size = sizeof(struct perf_event_attr); |
| size = ALIGN(size, sizeof(u64)); |
| size += sizeof(struct perf_event_header); |
| size += ids * sizeof(u64); |
| |
| ev = malloc(size); |
| |
| if (ev == NULL) |
| return -ENOMEM; |
| |
| ev->attr.attr = *attr; |
| memcpy(ev->attr.id, id, ids * sizeof(u64)); |
| |
| ev->attr.header.type = PERF_RECORD_HEADER_ATTR; |
| ev->attr.header.size = size; |
| |
| err = process(ev, NULL, session); |
| |
| free(ev); |
| |
| return err; |
| } |
| |
| int event__synthesize_attrs(struct perf_header *self, event__handler_t process, |
| struct perf_session *session) |
| { |
| struct perf_header_attr *attr; |
| int i, err = 0; |
| |
| for (i = 0; i < self->attrs; i++) { |
| attr = self->attr[i]; |
| |
| err = event__synthesize_attr(&attr->attr, attr->ids, attr->id, |
| process, session); |
| if (err) { |
| pr_debug("failed to create perf header attribute\n"); |
| return err; |
| } |
| } |
| |
| return err; |
| } |
| |
| int event__process_attr(event_t *self, struct perf_session *session) |
| { |
| struct perf_header_attr *attr; |
| unsigned int i, ids, n_ids; |
| |
| attr = perf_header_attr__new(&self->attr.attr); |
| if (attr == NULL) |
| return -ENOMEM; |
| |
| ids = self->header.size; |
| ids -= (void *)&self->attr.id - (void *)self; |
| n_ids = ids / sizeof(u64); |
| |
| for (i = 0; i < n_ids; i++) { |
| if (perf_header_attr__add_id(attr, self->attr.id[i]) < 0) { |
| perf_header_attr__delete(attr); |
| return -ENOMEM; |
| } |
| } |
| |
| if (perf_header__add_attr(&session->header, attr) < 0) { |
| perf_header_attr__delete(attr); |
| return -ENOMEM; |
| } |
| |
| perf_session__update_sample_type(session); |
| |
| return 0; |
| } |
| |
| int event__synthesize_event_type(u64 event_id, char *name, |
| event__handler_t process, |
| struct perf_session *session) |
| { |
| event_t 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(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(&ev, NULL, session); |
| |
| return err; |
| } |
| |
| int event__synthesize_event_types(event__handler_t process, |
| struct perf_session *session) |
| { |
| struct perf_trace_event_type *type; |
| int i, err = 0; |
| |
| for (i = 0; i < event_count; i++) { |
| type = &events[i]; |
| |
| err = event__synthesize_event_type(type->event_id, type->name, |
| process, session); |
| if (err) { |
| pr_debug("failed to create perf header event type\n"); |
| return err; |
| } |
| } |
| |
| return err; |
| } |
| |
| int event__process_event_type(event_t *self, |
| struct perf_session *session __unused) |
| { |
| if (perf_header__push_event(self->event_type.event_type.event_id, |
| self->event_type.event_type.name) < 0) |
| return -ENOMEM; |
| |
| return 0; |
| } |
| |
| int event__synthesize_tracing_data(int fd, struct list_head *pattrs, |
| event__handler_t process, |
| struct perf_session *session __unused) |
| { |
| event_t ev; |
| ssize_t size = 0, aligned_size = 0, padding; |
| int err = 0; |
| |
| memset(&ev, 0, sizeof(ev)); |
| |
| ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA; |
| size = read_tracing_data_size(fd, pattrs); |
| if (size <= 0) |
| return size; |
| aligned_size = ALIGN(size, sizeof(u64)); |
| padding = aligned_size - size; |
| ev.tracing_data.header.size = sizeof(ev.tracing_data); |
| ev.tracing_data.size = aligned_size; |
| |
| process(&ev, NULL, session); |
| |
| err = read_tracing_data(fd, pattrs); |
| write_padded(fd, NULL, 0, padding); |
| |
| return aligned_size; |
| } |
| |
| int event__process_tracing_data(event_t *self, |
| struct perf_session *session) |
| { |
| ssize_t size_read, padding, size = self->tracing_data.size; |
| off_t offset = lseek(session->fd, 0, SEEK_CUR); |
| char buf[BUFSIZ]; |
| |
| /* setup for reading amidst mmap */ |
| lseek(session->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; |
| |
| if (read(session->fd, buf, padding) < 0) |
| die("reading input file"); |
| if (session->repipe) { |
| int retw = write(STDOUT_FILENO, buf, padding); |
| if (retw <= 0 || retw != padding) |
| die("repiping tracing data padding"); |
| } |
| |
| if (size_read + padding != size) |
| die("tracing data size mismatch"); |
| |
| return size_read + padding; |
| } |
| |
| int event__synthesize_build_id(struct dso *pos, u16 misc, |
| event__handler_t process, |
| struct machine *machine, |
| struct perf_session *session) |
| { |
| event_t ev; |
| size_t len; |
| int err = 0; |
| |
| if (!pos->hit) |
| return err; |
| |
| memset(&ev, 0, sizeof(ev)); |
| |
| len = pos->long_name_len + 1; |
| len = 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(&ev, NULL, session); |
| |
| return err; |
| } |
| |
| int event__process_build_id(event_t *self, |
| struct perf_session *session) |
| { |
| __event_process_build_id(&self->build_id, |
| self->build_id.filename, |
| session); |
| return 0; |
| } |
| |
| void disable_buildid_cache(void) |
| { |
| no_buildid_cache = true; |
| } |