74429964d8
These APIs should belong to evlist.c as they may not be exclusively tied to the headers. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Stephane Eranian <eranian@google.com
1179 lines
28 KiB
C
1179 lines
28 KiB
C
#define _FILE_OFFSET_BITS 64
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#include <sys/types.h>
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#include <byteswap.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <linux/list.h>
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#include <linux/kernel.h>
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#include "evlist.h"
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#include "evsel.h"
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#include "util.h"
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#include "header.h"
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#include "../perf.h"
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#include "trace-event.h"
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#include "session.h"
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#include "symbol.h"
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#include "debug.h"
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static bool no_buildid_cache = false;
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static int event_count;
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static struct perf_trace_event_type *events;
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int perf_header__push_event(u64 id, const char *name)
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{
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if (strlen(name) > MAX_EVENT_NAME)
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pr_warning("Event %s will be truncated\n", name);
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if (!events) {
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events = malloc(sizeof(struct perf_trace_event_type));
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if (events == NULL)
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return -ENOMEM;
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} else {
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struct perf_trace_event_type *nevents;
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nevents = realloc(events, (event_count + 1) * sizeof(*events));
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if (nevents == NULL)
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return -ENOMEM;
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events = nevents;
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}
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memset(&events[event_count], 0, sizeof(struct perf_trace_event_type));
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events[event_count].event_id = id;
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strncpy(events[event_count].name, name, MAX_EVENT_NAME - 1);
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event_count++;
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return 0;
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}
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char *perf_header__find_event(u64 id)
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{
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int i;
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for (i = 0 ; i < event_count; i++) {
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if (events[i].event_id == id)
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return events[i].name;
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}
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return NULL;
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}
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static const char *__perf_magic = "PERFFILE";
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#define PERF_MAGIC (*(u64 *)__perf_magic)
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struct perf_file_attr {
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struct perf_event_attr attr;
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struct perf_file_section ids;
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};
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void perf_header__set_feat(struct perf_header *header, int feat)
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{
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set_bit(feat, header->adds_features);
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}
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void perf_header__clear_feat(struct perf_header *header, int feat)
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{
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clear_bit(feat, header->adds_features);
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}
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bool perf_header__has_feat(const struct perf_header *header, int feat)
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{
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return test_bit(feat, header->adds_features);
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}
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static int do_write(int fd, const void *buf, size_t size)
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{
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while (size) {
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int ret = write(fd, buf, size);
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if (ret < 0)
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return -errno;
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size -= ret;
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buf += ret;
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}
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return 0;
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}
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#define NAME_ALIGN 64
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static int write_padded(int fd, const void *bf, size_t count,
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size_t count_aligned)
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{
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static const char zero_buf[NAME_ALIGN];
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int err = do_write(fd, bf, count);
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if (!err)
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err = do_write(fd, zero_buf, count_aligned - count);
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return err;
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}
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#define dsos__for_each_with_build_id(pos, head) \
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list_for_each_entry(pos, head, node) \
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if (!pos->has_build_id) \
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continue; \
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else
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static int __dsos__write_buildid_table(struct list_head *head, pid_t pid,
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u16 misc, int fd)
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{
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struct dso *pos;
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dsos__for_each_with_build_id(pos, head) {
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int err;
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struct build_id_event b;
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size_t len;
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if (!pos->hit)
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continue;
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len = pos->long_name_len + 1;
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len = ALIGN(len, NAME_ALIGN);
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memset(&b, 0, sizeof(b));
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memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id));
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b.pid = pid;
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b.header.misc = misc;
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b.header.size = sizeof(b) + len;
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err = do_write(fd, &b, sizeof(b));
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if (err < 0)
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return err;
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err = write_padded(fd, pos->long_name,
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pos->long_name_len + 1, len);
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if (err < 0)
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return err;
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}
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return 0;
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}
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static int machine__write_buildid_table(struct machine *machine, int fd)
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{
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int err;
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u16 kmisc = PERF_RECORD_MISC_KERNEL,
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umisc = PERF_RECORD_MISC_USER;
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if (!machine__is_host(machine)) {
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kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
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umisc = PERF_RECORD_MISC_GUEST_USER;
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}
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err = __dsos__write_buildid_table(&machine->kernel_dsos, machine->pid,
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kmisc, fd);
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if (err == 0)
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err = __dsos__write_buildid_table(&machine->user_dsos,
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machine->pid, umisc, fd);
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return err;
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}
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static int dsos__write_buildid_table(struct perf_header *header, int fd)
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{
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struct perf_session *session = container_of(header,
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struct perf_session, header);
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struct rb_node *nd;
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int err = machine__write_buildid_table(&session->host_machine, fd);
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if (err)
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return err;
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for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
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struct machine *pos = rb_entry(nd, struct machine, rb_node);
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err = machine__write_buildid_table(pos, fd);
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if (err)
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break;
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}
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return err;
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}
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int build_id_cache__add_s(const char *sbuild_id, const char *debugdir,
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const char *name, bool is_kallsyms)
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{
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const size_t size = PATH_MAX;
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char *realname, *filename = malloc(size),
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*linkname = malloc(size), *targetname;
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int len, err = -1;
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if (is_kallsyms)
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realname = (char *)name;
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else
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realname = realpath(name, NULL);
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if (realname == NULL || filename == NULL || linkname == NULL)
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goto out_free;
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len = snprintf(filename, size, "%s%s%s",
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debugdir, is_kallsyms ? "/" : "", realname);
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if (mkdir_p(filename, 0755))
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goto out_free;
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snprintf(filename + len, sizeof(filename) - len, "/%s", sbuild_id);
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if (access(filename, F_OK)) {
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if (is_kallsyms) {
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if (copyfile("/proc/kallsyms", filename))
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goto out_free;
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} else if (link(realname, filename) && copyfile(name, filename))
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goto out_free;
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}
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len = snprintf(linkname, size, "%s/.build-id/%.2s",
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debugdir, sbuild_id);
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if (access(linkname, X_OK) && mkdir_p(linkname, 0755))
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goto out_free;
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snprintf(linkname + len, size - len, "/%s", sbuild_id + 2);
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targetname = filename + strlen(debugdir) - 5;
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memcpy(targetname, "../..", 5);
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if (symlink(targetname, linkname) == 0)
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err = 0;
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out_free:
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if (!is_kallsyms)
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free(realname);
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free(filename);
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free(linkname);
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return err;
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}
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static int build_id_cache__add_b(const u8 *build_id, size_t build_id_size,
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const char *name, const char *debugdir,
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bool is_kallsyms)
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{
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char sbuild_id[BUILD_ID_SIZE * 2 + 1];
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build_id__sprintf(build_id, build_id_size, sbuild_id);
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return build_id_cache__add_s(sbuild_id, debugdir, name, is_kallsyms);
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}
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int build_id_cache__remove_s(const char *sbuild_id, const char *debugdir)
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{
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const size_t size = PATH_MAX;
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char *filename = malloc(size),
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*linkname = malloc(size);
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int err = -1;
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if (filename == NULL || linkname == NULL)
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goto out_free;
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snprintf(linkname, size, "%s/.build-id/%.2s/%s",
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debugdir, sbuild_id, sbuild_id + 2);
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if (access(linkname, F_OK))
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goto out_free;
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if (readlink(linkname, filename, size) < 0)
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goto out_free;
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if (unlink(linkname))
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goto out_free;
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/*
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* Since the link is relative, we must make it absolute:
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*/
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snprintf(linkname, size, "%s/.build-id/%.2s/%s",
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debugdir, sbuild_id, filename);
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if (unlink(linkname))
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goto out_free;
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err = 0;
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out_free:
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free(filename);
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free(linkname);
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return err;
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}
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static int dso__cache_build_id(struct dso *dso, const char *debugdir)
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{
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bool is_kallsyms = dso->kernel && dso->long_name[0] != '/';
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return build_id_cache__add_b(dso->build_id, sizeof(dso->build_id),
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dso->long_name, debugdir, is_kallsyms);
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}
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static int __dsos__cache_build_ids(struct list_head *head, const char *debugdir)
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{
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struct dso *pos;
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int err = 0;
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dsos__for_each_with_build_id(pos, head)
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if (dso__cache_build_id(pos, debugdir))
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err = -1;
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return err;
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}
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static int machine__cache_build_ids(struct machine *machine, const char *debugdir)
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{
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int ret = __dsos__cache_build_ids(&machine->kernel_dsos, debugdir);
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ret |= __dsos__cache_build_ids(&machine->user_dsos, debugdir);
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return ret;
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}
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static int perf_session__cache_build_ids(struct perf_session *session)
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{
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struct rb_node *nd;
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int ret;
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char debugdir[PATH_MAX];
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snprintf(debugdir, sizeof(debugdir), "%s", buildid_dir);
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if (mkdir(debugdir, 0755) != 0 && errno != EEXIST)
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return -1;
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ret = machine__cache_build_ids(&session->host_machine, debugdir);
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for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
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struct machine *pos = rb_entry(nd, struct machine, rb_node);
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ret |= machine__cache_build_ids(pos, debugdir);
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}
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return ret ? -1 : 0;
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}
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static bool machine__read_build_ids(struct machine *machine, bool with_hits)
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{
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bool ret = __dsos__read_build_ids(&machine->kernel_dsos, with_hits);
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ret |= __dsos__read_build_ids(&machine->user_dsos, with_hits);
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return ret;
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}
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static bool perf_session__read_build_ids(struct perf_session *session, bool with_hits)
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{
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struct rb_node *nd;
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bool ret = machine__read_build_ids(&session->host_machine, with_hits);
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for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
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struct machine *pos = rb_entry(nd, struct machine, rb_node);
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ret |= machine__read_build_ids(pos, with_hits);
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}
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return ret;
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}
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static int perf_header__adds_write(struct perf_header *header,
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struct perf_evlist *evlist, int fd)
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{
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int nr_sections;
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struct perf_session *session;
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struct perf_file_section *feat_sec;
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int sec_size;
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u64 sec_start;
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int idx = 0, err;
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session = container_of(header, struct perf_session, header);
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if (perf_header__has_feat(header, HEADER_BUILD_ID &&
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!perf_session__read_build_ids(session, true)))
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perf_header__clear_feat(header, HEADER_BUILD_ID);
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nr_sections = bitmap_weight(header->adds_features, HEADER_FEAT_BITS);
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if (!nr_sections)
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return 0;
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feat_sec = calloc(sizeof(*feat_sec), nr_sections);
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if (feat_sec == NULL)
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return -ENOMEM;
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sec_size = sizeof(*feat_sec) * nr_sections;
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sec_start = header->data_offset + header->data_size;
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lseek(fd, sec_start + sec_size, SEEK_SET);
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if (perf_header__has_feat(header, HEADER_TRACE_INFO)) {
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struct perf_file_section *trace_sec;
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trace_sec = &feat_sec[idx++];
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/* Write trace info */
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trace_sec->offset = lseek(fd, 0, SEEK_CUR);
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read_tracing_data(fd, &evlist->entries);
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trace_sec->size = lseek(fd, 0, SEEK_CUR) - trace_sec->offset;
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}
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if (perf_header__has_feat(header, HEADER_BUILD_ID)) {
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struct perf_file_section *buildid_sec;
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buildid_sec = &feat_sec[idx++];
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/* Write build-ids */
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buildid_sec->offset = lseek(fd, 0, SEEK_CUR);
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err = dsos__write_buildid_table(header, fd);
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if (err < 0) {
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pr_debug("failed to write buildid table\n");
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goto out_free;
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}
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buildid_sec->size = lseek(fd, 0, SEEK_CUR) -
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buildid_sec->offset;
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if (!no_buildid_cache)
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perf_session__cache_build_ids(session);
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}
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lseek(fd, sec_start, SEEK_SET);
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err = do_write(fd, feat_sec, sec_size);
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if (err < 0)
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pr_debug("failed to write feature section\n");
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out_free:
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free(feat_sec);
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return err;
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}
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|
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int perf_header__write_pipe(int fd)
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{
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struct perf_pipe_file_header f_header;
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int err;
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f_header = (struct perf_pipe_file_header){
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.magic = PERF_MAGIC,
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.size = sizeof(f_header),
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};
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err = do_write(fd, &f_header, sizeof(f_header));
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if (err < 0) {
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pr_debug("failed to write perf pipe header\n");
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return err;
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}
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|
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return 0;
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}
|
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|
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int perf_session__write_header(struct perf_session *session,
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struct perf_evlist *evlist,
|
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int fd, bool at_exit)
|
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{
|
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struct perf_file_header f_header;
|
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struct perf_file_attr f_attr;
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struct perf_header *header = &session->header;
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struct perf_evsel *attr, *pair = NULL;
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int err;
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|
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lseek(fd, sizeof(f_header), SEEK_SET);
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|
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if (session->evlist != evlist)
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pair = list_entry(session->evlist->entries.next, struct perf_evsel, node);
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|
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list_for_each_entry(attr, &evlist->entries, node) {
|
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attr->id_offset = lseek(fd, 0, SEEK_CUR);
|
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err = do_write(fd, attr->id, attr->ids * sizeof(u64));
|
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if (err < 0) {
|
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out_err_write:
|
|
pr_debug("failed to write perf header\n");
|
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return err;
|
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}
|
|
if (session->evlist != evlist) {
|
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err = do_write(fd, pair->id, pair->ids * sizeof(u64));
|
|
if (err < 0)
|
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goto out_err_write;
|
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attr->ids += pair->ids;
|
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pair = list_entry(pair->node.next, struct perf_evsel, node);
|
|
}
|
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}
|
|
|
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header->attr_offset = lseek(fd, 0, SEEK_CUR);
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|
|
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list_for_each_entry(attr, &evlist->entries, node) {
|
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f_attr = (struct perf_file_attr){
|
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.attr = attr->attr,
|
|
.ids = {
|
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.offset = attr->id_offset,
|
|
.size = attr->ids * sizeof(u64),
|
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}
|
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};
|
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err = do_write(fd, &f_attr, sizeof(f_attr));
|
|
if (err < 0) {
|
|
pr_debug("failed to write perf header attribute\n");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
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) {
|
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pr_debug("failed to write perf header events\n");
|
|
return err;
|
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}
|
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}
|
|
|
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header->data_offset = lseek(fd, 0, SEEK_CUR);
|
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|
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if (at_exit) {
|
|
err = perf_header__adds_write(header, evlist, fd);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
f_header = (struct perf_file_header){
|
|
.magic = PERF_MAGIC,
|
|
.size = sizeof(f_header),
|
|
.attr_size = sizeof(f_attr),
|
|
.attrs = {
|
|
.offset = header->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,
|
|
},
|
|
};
|
|
|
|
memcpy(&f_header.adds_features, &header->adds_features, sizeof(header->adds_features));
|
|
|
|
lseek(fd, 0, SEEK_SET);
|
|
err = do_write(fd, &f_header, sizeof(f_header));
|
|
if (err < 0) {
|
|
pr_debug("failed to write perf header\n");
|
|
return err;
|
|
}
|
|
lseek(fd, header->data_offset + header->data_size, SEEK_SET);
|
|
|
|
header->frozen = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int perf_header__getbuffer64(struct perf_header *header,
|
|
int fd, void *buf, size_t size)
|
|
{
|
|
if (readn(fd, buf, size) <= 0)
|
|
return -1;
|
|
|
|
if (header->needs_swap)
|
|
mem_bswap_64(buf, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_header__process_sections(struct perf_header *header, int fd,
|
|
int (*process)(struct perf_file_section *section,
|
|
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(header->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, header->data_offset + header->data_size, SEEK_SET);
|
|
|
|
if (perf_header__getbuffer64(header, fd, feat_sec, sec_size))
|
|
goto out_free;
|
|
|
|
err = 0;
|
|
while (idx < nr_sections && feat < HEADER_LAST_FEATURE) {
|
|
if (perf_header__has_feat(header, feat)) {
|
|
struct perf_file_section *sec = &feat_sec[idx++];
|
|
|
|
err = process(sec, header, feat, fd);
|
|
if (err < 0)
|
|
break;
|
|
}
|
|
++feat;
|
|
}
|
|
out_free:
|
|
free(feat_sec);
|
|
return err;
|
|
}
|
|
|
|
int perf_file_header__read(struct perf_file_header *header,
|
|
struct perf_header *ph, int fd)
|
|
{
|
|
lseek(fd, 0, SEEK_SET);
|
|
|
|
if (readn(fd, header, sizeof(*header)) <= 0 ||
|
|
memcmp(&header->magic, __perf_magic, sizeof(header->magic)))
|
|
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;
|
|
|
|
mem_bswap_64(header, offsetof(struct perf_file_header,
|
|
adds_features));
|
|
ph->needs_swap = true;
|
|
}
|
|
|
|
if (header->size != sizeof(*header)) {
|
|
/* Support the previous format */
|
|
if (header->size == offsetof(typeof(*header), adds_features))
|
|
bitmap_zero(header->adds_features, HEADER_FEAT_BITS);
|
|
else
|
|
return -1;
|
|
}
|
|
|
|
memcpy(&ph->adds_features, &header->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 = header->event_types.offset;
|
|
ph->event_size = header->event_types.size;
|
|
ph->data_offset = header->data.offset;
|
|
ph->data_size = header->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_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[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 (read(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 (read(input, filename, len) != len)
|
|
return -1;
|
|
|
|
bev.header = old_bev.header;
|
|
bev.pid = 0;
|
|
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 (read(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 (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);
|
|
}
|
|
|
|
__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 *section,
|
|
struct perf_header *ph,
|
|
int feat, int fd)
|
|
{
|
|
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;
|
|
}
|
|
|
|
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:
|
|
pr_debug("unknown feature %d, continuing...\n", feat);
|
|
}
|
|
|
|
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)))
|
|
return -1;
|
|
|
|
if (repipe && do_write(STDOUT_FILENO, header, sizeof(*header)) < 0)
|
|
return -1;
|
|
|
|
if (header->size != sizeof(*header)) {
|
|
u64 size = bswap_64(header->size);
|
|
|
|
if (size != sizeof(*header))
|
|
return -1;
|
|
|
|
ph->needs_swap = true;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int perf_header__read_pipe(struct perf_session *session, int fd)
|
|
{
|
|
struct perf_header *header = &session->header;
|
|
struct perf_pipe_file_header f_header;
|
|
|
|
if (perf_file_header__read_pipe(&f_header, header, fd,
|
|
session->repipe) < 0) {
|
|
pr_debug("incompatible file format\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
session->fd = fd;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_session__read_header(struct perf_session *session, int fd)
|
|
{
|
|
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;
|
|
|
|
session->evlist = perf_evlist__new(NULL, NULL);
|
|
if (session->evlist == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (session->fd_pipe)
|
|
return perf_header__read_pipe(session, fd);
|
|
|
|
if (perf_file_header__read(&f_header, header, 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_evsel *evsel;
|
|
off_t tmp;
|
|
|
|
if (perf_header__getbuffer64(header, fd, &f_attr, sizeof(f_attr)))
|
|
goto out_errno;
|
|
|
|
tmp = lseek(fd, 0, SEEK_CUR);
|
|
evsel = perf_evsel__new(&f_attr.attr, i);
|
|
|
|
if (evsel == NULL)
|
|
goto out_delete_evlist;
|
|
/*
|
|
* Do it before so that if perf_evsel__alloc_id fails, this
|
|
* entry gets purged too at perf_evlist__delete().
|
|
*/
|
|
perf_evlist__add(session->evlist, evsel);
|
|
|
|
nr_ids = f_attr.ids.size / sizeof(u64);
|
|
/*
|
|
* We don't have the cpu and thread maps on the header, so
|
|
* for allocating the perf_sample_id table we fake 1 cpu and
|
|
* hattr->ids threads.
|
|
*/
|
|
if (perf_evsel__alloc_id(evsel, 1, nr_ids))
|
|
goto out_delete_evlist;
|
|
|
|
lseek(fd, f_attr.ids.offset, SEEK_SET);
|
|
|
|
for (j = 0; j < nr_ids; j++) {
|
|
if (perf_header__getbuffer64(header, fd, &f_id, sizeof(f_id)))
|
|
goto out_errno;
|
|
|
|
perf_evlist__id_add(session->evlist, evsel, 0, j, f_id);
|
|
}
|
|
|
|
lseek(fd, tmp, SEEK_SET);
|
|
}
|
|
|
|
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, perf_file_section__process);
|
|
|
|
lseek(fd, header->data_offset, SEEK_SET);
|
|
|
|
header->frozen = 1;
|
|
return 0;
|
|
out_errno:
|
|
return -errno;
|
|
|
|
out_delete_evlist:
|
|
perf_evlist__delete(session->evlist);
|
|
session->evlist = NULL;
|
|
return -ENOMEM;
|
|
}
|
|
|
|
int perf_event__synthesize_attr(struct perf_event_attr *attr, u16 ids, u64 *id,
|
|
perf_event__handler_t process,
|
|
struct perf_session *session)
|
|
{
|
|
union perf_event *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 perf_session__synthesize_attrs(struct perf_session *session,
|
|
perf_event__handler_t process)
|
|
{
|
|
struct perf_evsel *attr;
|
|
int err = 0;
|
|
|
|
list_for_each_entry(attr, &session->evlist->entries, node) {
|
|
err = perf_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 perf_event__process_attr(union perf_event *event,
|
|
struct perf_session *session)
|
|
{
|
|
unsigned int i, ids, n_ids;
|
|
struct perf_evsel *evsel;
|
|
|
|
if (session->evlist == NULL) {
|
|
session->evlist = perf_evlist__new(NULL, NULL);
|
|
if (session->evlist == NULL)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
evsel = perf_evsel__new(&event->attr.attr,
|
|
session->evlist->nr_entries);
|
|
if (evsel == NULL)
|
|
return -ENOMEM;
|
|
|
|
perf_evlist__add(session->evlist, evsel);
|
|
|
|
ids = event->header.size;
|
|
ids -= (void *)&event->attr.id - (void *)event;
|
|
n_ids = ids / sizeof(u64);
|
|
/*
|
|
* We don't have the cpu and thread maps on the header, so
|
|
* for allocating the perf_sample_id table we fake 1 cpu and
|
|
* hattr->ids threads.
|
|
*/
|
|
if (perf_evsel__alloc_id(evsel, 1, n_ids))
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < n_ids; i++) {
|
|
perf_evlist__id_add(session->evlist, evsel, 0, i,
|
|
event->attr.id[i]);
|
|
}
|
|
|
|
perf_session__update_sample_type(session);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_event__synthesize_event_type(u64 event_id, char *name,
|
|
perf_event__handler_t process,
|
|
struct perf_session *session)
|
|
{
|
|
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(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 perf_event__synthesize_event_types(perf_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 = perf_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 perf_event__process_event_type(union perf_event *event,
|
|
struct perf_session *session __unused)
|
|
{
|
|
if (perf_header__push_event(event->event_type.event_type.event_id,
|
|
event->event_type.event_type.name) < 0)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int perf_event__synthesize_tracing_data(int fd, struct perf_evlist *evlist,
|
|
perf_event__handler_t process,
|
|
struct perf_session *session __unused)
|
|
{
|
|
union perf_event ev;
|
|
ssize_t size = 0, aligned_size = 0, padding;
|
|
int err __used = 0;
|
|
|
|
memset(&ev, 0, sizeof(ev));
|
|
|
|
ev.tracing_data.header.type = PERF_RECORD_HEADER_TRACING_DATA;
|
|
size = read_tracing_data_size(fd, &evlist->entries);
|
|
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, &evlist->entries);
|
|
write_padded(fd, NULL, 0, padding);
|
|
|
|
return aligned_size;
|
|
}
|
|
|
|
int perf_event__process_tracing_data(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);
|
|
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 perf_event__synthesize_build_id(struct dso *pos, u16 misc,
|
|
perf_event__handler_t process,
|
|
struct machine *machine,
|
|
struct perf_session *session)
|
|
{
|
|
union perf_event ev;
|
|
size_t len;
|
|
int err = 0;
|
|
|
|
if (!pos->hit)
|
|
return err;
|
|
|
|
memset(&ev, 0, sizeof(ev));
|
|
|
|
len = pos->long_name_len + 1;
|
|
len = 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 perf_event__process_build_id(union perf_event *event,
|
|
struct perf_session *session)
|
|
{
|
|
__event_process_build_id(&event->build_id,
|
|
event->build_id.filename,
|
|
session);
|
|
return 0;
|
|
}
|
|
|
|
void disable_buildid_cache(void)
|
|
{
|
|
no_buildid_cache = true;
|
|
}
|