forked from luck/tmp_suning_uos_patched
70597f21f1
If we receive two PERF_RECORD_EXIT for the same thread, we can end up reusing session->last_match and trying to remove the thread twice from the rb_tree, causing a segfault, so invalidade last_match in perf_session__remove_thread. Receiving two PERF_RECORD_EXIT for the same thread is a bug, but its a harmless one if we make the tool more robust, like this patch does. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
932 lines
23 KiB
C
932 lines
23 KiB
C
#define _FILE_OFFSET_BITS 64
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#include <linux/kernel.h>
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#include <byteswap.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include "session.h"
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#include "sort.h"
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#include "util.h"
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static int perf_session__open(struct perf_session *self, bool force)
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{
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struct stat input_stat;
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if (!strcmp(self->filename, "-")) {
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self->fd_pipe = true;
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self->fd = STDIN_FILENO;
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if (perf_header__read(self, self->fd) < 0)
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pr_err("incompatible file format");
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return 0;
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}
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self->fd = open(self->filename, O_RDONLY);
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if (self->fd < 0) {
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int err = errno;
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pr_err("failed to open %s: %s", self->filename, strerror(err));
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if (err == ENOENT && !strcmp(self->filename, "perf.data"))
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pr_err(" (try 'perf record' first)");
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pr_err("\n");
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return -errno;
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}
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if (fstat(self->fd, &input_stat) < 0)
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goto out_close;
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if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
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pr_err("file %s not owned by current user or root\n",
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self->filename);
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goto out_close;
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}
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if (!input_stat.st_size) {
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pr_info("zero-sized file (%s), nothing to do!\n",
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self->filename);
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goto out_close;
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}
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if (perf_header__read(self, self->fd) < 0) {
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pr_err("incompatible file format");
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goto out_close;
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}
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self->size = input_stat.st_size;
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return 0;
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out_close:
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close(self->fd);
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self->fd = -1;
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return -1;
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}
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void perf_session__update_sample_type(struct perf_session *self)
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{
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self->sample_type = perf_header__sample_type(&self->header);
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}
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int perf_session__create_kernel_maps(struct perf_session *self)
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{
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int ret = machine__create_kernel_maps(&self->host_machine);
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if (ret >= 0)
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ret = machines__create_guest_kernel_maps(&self->machines);
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return ret;
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}
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static void perf_session__destroy_kernel_maps(struct perf_session *self)
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{
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machine__destroy_kernel_maps(&self->host_machine);
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machines__destroy_guest_kernel_maps(&self->machines);
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}
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struct perf_session *perf_session__new(const char *filename, int mode, bool force, bool repipe)
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{
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size_t len = filename ? strlen(filename) + 1 : 0;
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struct perf_session *self = zalloc(sizeof(*self) + len);
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if (self == NULL)
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goto out;
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if (perf_header__init(&self->header) < 0)
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goto out_free;
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memcpy(self->filename, filename, len);
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self->threads = RB_ROOT;
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INIT_LIST_HEAD(&self->dead_threads);
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self->hists_tree = RB_ROOT;
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self->last_match = NULL;
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self->mmap_window = 32;
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self->machines = RB_ROOT;
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self->repipe = repipe;
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INIT_LIST_HEAD(&self->ordered_samples.samples_head);
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machine__init(&self->host_machine, "", HOST_KERNEL_ID);
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if (mode == O_RDONLY) {
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if (perf_session__open(self, force) < 0)
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goto out_delete;
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} else if (mode == O_WRONLY) {
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/*
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* In O_RDONLY mode this will be performed when reading the
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* kernel MMAP event, in event__process_mmap().
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*/
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if (perf_session__create_kernel_maps(self) < 0)
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goto out_delete;
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}
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perf_session__update_sample_type(self);
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out:
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return self;
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out_free:
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free(self);
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return NULL;
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out_delete:
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perf_session__delete(self);
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return NULL;
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}
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static void perf_session__delete_dead_threads(struct perf_session *self)
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{
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struct thread *n, *t;
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list_for_each_entry_safe(t, n, &self->dead_threads, node) {
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list_del(&t->node);
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thread__delete(t);
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}
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}
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static void perf_session__delete_threads(struct perf_session *self)
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{
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struct rb_node *nd = rb_first(&self->threads);
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while (nd) {
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struct thread *t = rb_entry(nd, struct thread, rb_node);
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rb_erase(&t->rb_node, &self->threads);
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nd = rb_next(nd);
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thread__delete(t);
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}
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}
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void perf_session__delete(struct perf_session *self)
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{
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perf_header__exit(&self->header);
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perf_session__destroy_kernel_maps(self);
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perf_session__delete_dead_threads(self);
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perf_session__delete_threads(self);
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machine__exit(&self->host_machine);
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close(self->fd);
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free(self);
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}
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void perf_session__remove_thread(struct perf_session *self, struct thread *th)
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{
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self->last_match = NULL;
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rb_erase(&th->rb_node, &self->threads);
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/*
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* We may have references to this thread, for instance in some hist_entry
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* instances, so just move them to a separate list.
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*/
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list_add_tail(&th->node, &self->dead_threads);
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}
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static bool symbol__match_parent_regex(struct symbol *sym)
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{
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if (sym->name && !regexec(&parent_regex, sym->name, 0, NULL, 0))
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return 1;
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return 0;
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}
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struct map_symbol *perf_session__resolve_callchain(struct perf_session *self,
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struct thread *thread,
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struct ip_callchain *chain,
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struct symbol **parent)
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{
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u8 cpumode = PERF_RECORD_MISC_USER;
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unsigned int i;
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struct map_symbol *syms = calloc(chain->nr, sizeof(*syms));
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if (!syms)
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return NULL;
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for (i = 0; i < chain->nr; i++) {
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u64 ip = chain->ips[i];
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struct addr_location al;
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if (ip >= PERF_CONTEXT_MAX) {
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switch (ip) {
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case PERF_CONTEXT_HV:
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cpumode = PERF_RECORD_MISC_HYPERVISOR; break;
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case PERF_CONTEXT_KERNEL:
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cpumode = PERF_RECORD_MISC_KERNEL; break;
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case PERF_CONTEXT_USER:
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cpumode = PERF_RECORD_MISC_USER; break;
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default:
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break;
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}
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continue;
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}
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al.filtered = false;
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thread__find_addr_location(thread, self, cpumode,
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MAP__FUNCTION, thread->pid, ip, &al, NULL);
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if (al.sym != NULL) {
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if (sort__has_parent && !*parent &&
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symbol__match_parent_regex(al.sym))
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*parent = al.sym;
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if (!symbol_conf.use_callchain)
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break;
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syms[i].map = al.map;
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syms[i].sym = al.sym;
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}
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}
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return syms;
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}
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static int process_event_stub(event_t *event __used,
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struct perf_session *session __used)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_finished_round_stub(event_t *event __used,
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struct perf_session *session __used,
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struct perf_event_ops *ops __used)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_finished_round(event_t *event,
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struct perf_session *session,
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struct perf_event_ops *ops);
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static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
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{
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if (handler->sample == NULL)
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handler->sample = process_event_stub;
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if (handler->mmap == NULL)
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handler->mmap = process_event_stub;
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if (handler->comm == NULL)
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handler->comm = process_event_stub;
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if (handler->fork == NULL)
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handler->fork = process_event_stub;
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if (handler->exit == NULL)
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handler->exit = process_event_stub;
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if (handler->lost == NULL)
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handler->lost = process_event_stub;
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if (handler->read == NULL)
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handler->read = process_event_stub;
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if (handler->throttle == NULL)
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handler->throttle = process_event_stub;
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if (handler->unthrottle == NULL)
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handler->unthrottle = process_event_stub;
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if (handler->attr == NULL)
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handler->attr = process_event_stub;
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if (handler->event_type == NULL)
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handler->event_type = process_event_stub;
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if (handler->tracing_data == NULL)
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handler->tracing_data = process_event_stub;
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if (handler->build_id == NULL)
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handler->build_id = process_event_stub;
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if (handler->finished_round == NULL) {
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if (handler->ordered_samples)
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handler->finished_round = process_finished_round;
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else
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handler->finished_round = process_finished_round_stub;
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}
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}
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void mem_bswap_64(void *src, int byte_size)
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{
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u64 *m = src;
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while (byte_size > 0) {
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*m = bswap_64(*m);
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byte_size -= sizeof(u64);
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++m;
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}
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}
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static void event__all64_swap(event_t *self)
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{
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struct perf_event_header *hdr = &self->header;
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mem_bswap_64(hdr + 1, self->header.size - sizeof(*hdr));
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}
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static void event__comm_swap(event_t *self)
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{
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self->comm.pid = bswap_32(self->comm.pid);
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self->comm.tid = bswap_32(self->comm.tid);
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}
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static void event__mmap_swap(event_t *self)
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{
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self->mmap.pid = bswap_32(self->mmap.pid);
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self->mmap.tid = bswap_32(self->mmap.tid);
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self->mmap.start = bswap_64(self->mmap.start);
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self->mmap.len = bswap_64(self->mmap.len);
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self->mmap.pgoff = bswap_64(self->mmap.pgoff);
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}
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static void event__task_swap(event_t *self)
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{
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self->fork.pid = bswap_32(self->fork.pid);
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self->fork.tid = bswap_32(self->fork.tid);
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self->fork.ppid = bswap_32(self->fork.ppid);
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self->fork.ptid = bswap_32(self->fork.ptid);
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self->fork.time = bswap_64(self->fork.time);
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}
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static void event__read_swap(event_t *self)
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{
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self->read.pid = bswap_32(self->read.pid);
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self->read.tid = bswap_32(self->read.tid);
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self->read.value = bswap_64(self->read.value);
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self->read.time_enabled = bswap_64(self->read.time_enabled);
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self->read.time_running = bswap_64(self->read.time_running);
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self->read.id = bswap_64(self->read.id);
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}
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static void event__attr_swap(event_t *self)
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{
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size_t size;
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self->attr.attr.type = bswap_32(self->attr.attr.type);
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self->attr.attr.size = bswap_32(self->attr.attr.size);
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self->attr.attr.config = bswap_64(self->attr.attr.config);
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self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period);
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self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type);
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self->attr.attr.read_format = bswap_64(self->attr.attr.read_format);
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self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events);
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self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type);
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self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr);
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self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len);
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size = self->header.size;
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size -= (void *)&self->attr.id - (void *)self;
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mem_bswap_64(self->attr.id, size);
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}
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static void event__event_type_swap(event_t *self)
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{
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self->event_type.event_type.event_id =
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bswap_64(self->event_type.event_type.event_id);
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}
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static void event__tracing_data_swap(event_t *self)
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{
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self->tracing_data.size = bswap_32(self->tracing_data.size);
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}
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typedef void (*event__swap_op)(event_t *self);
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static event__swap_op event__swap_ops[] = {
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[PERF_RECORD_MMAP] = event__mmap_swap,
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[PERF_RECORD_COMM] = event__comm_swap,
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[PERF_RECORD_FORK] = event__task_swap,
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[PERF_RECORD_EXIT] = event__task_swap,
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[PERF_RECORD_LOST] = event__all64_swap,
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[PERF_RECORD_READ] = event__read_swap,
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[PERF_RECORD_SAMPLE] = event__all64_swap,
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[PERF_RECORD_HEADER_ATTR] = event__attr_swap,
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[PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap,
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[PERF_RECORD_HEADER_TRACING_DATA] = event__tracing_data_swap,
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[PERF_RECORD_HEADER_BUILD_ID] = NULL,
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[PERF_RECORD_HEADER_MAX] = NULL,
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};
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struct sample_queue {
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u64 timestamp;
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struct sample_event *event;
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struct list_head list;
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};
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static void flush_sample_queue(struct perf_session *s,
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struct perf_event_ops *ops)
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{
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struct list_head *head = &s->ordered_samples.samples_head;
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u64 limit = s->ordered_samples.next_flush;
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struct sample_queue *tmp, *iter;
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if (!ops->ordered_samples || !limit)
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return;
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list_for_each_entry_safe(iter, tmp, head, list) {
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if (iter->timestamp > limit)
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return;
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if (iter == s->ordered_samples.last_inserted)
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s->ordered_samples.last_inserted = NULL;
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ops->sample((event_t *)iter->event, s);
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s->ordered_samples.last_flush = iter->timestamp;
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list_del(&iter->list);
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free(iter->event);
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free(iter);
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}
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}
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|
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/*
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* When perf record finishes a pass on every buffers, it records this pseudo
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* event.
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* We record the max timestamp t found in the pass n.
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* Assuming these timestamps are monotonic across cpus, we know that if
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* a buffer still has events with timestamps below t, they will be all
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* available and then read in the pass n + 1.
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* Hence when we start to read the pass n + 2, we can safely flush every
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* events with timestamps below t.
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*
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* ============ PASS n =================
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* CPU 0 | CPU 1
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* |
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* cnt1 timestamps | cnt2 timestamps
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* 1 | 2
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* 2 | 3
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* - | 4 <--- max recorded
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*
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* ============ PASS n + 1 ==============
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* CPU 0 | CPU 1
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* |
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* cnt1 timestamps | cnt2 timestamps
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* 3 | 5
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* 4 | 6
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* 5 | 7 <---- max recorded
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*
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* Flush every events below timestamp 4
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*
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* ============ PASS n + 2 ==============
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* CPU 0 | CPU 1
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* |
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* cnt1 timestamps | cnt2 timestamps
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* 6 | 8
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* 7 | 9
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* - | 10
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*
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* Flush every events below timestamp 7
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* etc...
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*/
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static int process_finished_round(event_t *event __used,
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struct perf_session *session,
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struct perf_event_ops *ops)
|
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{
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flush_sample_queue(session, ops);
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session->ordered_samples.next_flush = session->ordered_samples.max_timestamp;
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return 0;
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}
|
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|
|
static void __queue_sample_end(struct sample_queue *new, struct list_head *head)
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|
{
|
|
struct sample_queue *iter;
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|
|
list_for_each_entry_reverse(iter, head, list) {
|
|
if (iter->timestamp < new->timestamp) {
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list_add(&new->list, &iter->list);
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return;
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}
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}
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|
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list_add(&new->list, head);
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}
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|
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static void __queue_sample_before(struct sample_queue *new,
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struct sample_queue *iter,
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struct list_head *head)
|
|
{
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list_for_each_entry_continue_reverse(iter, head, list) {
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if (iter->timestamp < new->timestamp) {
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list_add(&new->list, &iter->list);
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return;
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}
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}
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|
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list_add(&new->list, head);
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}
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|
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static void __queue_sample_after(struct sample_queue *new,
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struct sample_queue *iter,
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struct list_head *head)
|
|
{
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list_for_each_entry_continue(iter, head, list) {
|
|
if (iter->timestamp > new->timestamp) {
|
|
list_add_tail(&new->list, &iter->list);
|
|
return;
|
|
}
|
|
}
|
|
list_add_tail(&new->list, head);
|
|
}
|
|
|
|
/* The queue is ordered by time */
|
|
static void __queue_sample_event(struct sample_queue *new,
|
|
struct perf_session *s)
|
|
{
|
|
struct sample_queue *last_inserted = s->ordered_samples.last_inserted;
|
|
struct list_head *head = &s->ordered_samples.samples_head;
|
|
|
|
|
|
if (!last_inserted) {
|
|
__queue_sample_end(new, head);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Most of the time the current event has a timestamp
|
|
* very close to the last event inserted, unless we just switched
|
|
* to another event buffer. Having a sorting based on a list and
|
|
* on the last inserted event that is close to the current one is
|
|
* probably more efficient than an rbtree based sorting.
|
|
*/
|
|
if (last_inserted->timestamp >= new->timestamp)
|
|
__queue_sample_before(new, last_inserted, head);
|
|
else
|
|
__queue_sample_after(new, last_inserted, head);
|
|
}
|
|
|
|
static int queue_sample_event(event_t *event, struct sample_data *data,
|
|
struct perf_session *s)
|
|
{
|
|
u64 timestamp = data->time;
|
|
struct sample_queue *new;
|
|
|
|
|
|
if (timestamp < s->ordered_samples.last_flush) {
|
|
printf("Warning: Timestamp below last timeslice flush\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
new = malloc(sizeof(*new));
|
|
if (!new)
|
|
return -ENOMEM;
|
|
|
|
new->timestamp = timestamp;
|
|
|
|
new->event = malloc(event->header.size);
|
|
if (!new->event) {
|
|
free(new);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memcpy(new->event, event, event->header.size);
|
|
|
|
__queue_sample_event(new, s);
|
|
s->ordered_samples.last_inserted = new;
|
|
|
|
if (new->timestamp > s->ordered_samples.max_timestamp)
|
|
s->ordered_samples.max_timestamp = new->timestamp;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int perf_session__process_sample(event_t *event, struct perf_session *s,
|
|
struct perf_event_ops *ops)
|
|
{
|
|
struct sample_data data;
|
|
|
|
if (!ops->ordered_samples)
|
|
return ops->sample(event, s);
|
|
|
|
bzero(&data, sizeof(struct sample_data));
|
|
event__parse_sample(event, s->sample_type, &data);
|
|
|
|
queue_sample_event(event, &data, s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int perf_session__process_event(struct perf_session *self,
|
|
event_t *event,
|
|
struct perf_event_ops *ops,
|
|
u64 offset, u64 head)
|
|
{
|
|
trace_event(event);
|
|
|
|
if (event->header.type < PERF_RECORD_HEADER_MAX) {
|
|
dump_printf("%#Lx [%#x]: PERF_RECORD_%s",
|
|
offset + head, event->header.size,
|
|
event__name[event->header.type]);
|
|
hists__inc_nr_events(&self->hists, event->header.type);
|
|
}
|
|
|
|
if (self->header.needs_swap && event__swap_ops[event->header.type])
|
|
event__swap_ops[event->header.type](event);
|
|
|
|
switch (event->header.type) {
|
|
case PERF_RECORD_SAMPLE:
|
|
return perf_session__process_sample(event, self, ops);
|
|
case PERF_RECORD_MMAP:
|
|
return ops->mmap(event, self);
|
|
case PERF_RECORD_COMM:
|
|
return ops->comm(event, self);
|
|
case PERF_RECORD_FORK:
|
|
return ops->fork(event, self);
|
|
case PERF_RECORD_EXIT:
|
|
return ops->exit(event, self);
|
|
case PERF_RECORD_LOST:
|
|
return ops->lost(event, self);
|
|
case PERF_RECORD_READ:
|
|
return ops->read(event, self);
|
|
case PERF_RECORD_THROTTLE:
|
|
return ops->throttle(event, self);
|
|
case PERF_RECORD_UNTHROTTLE:
|
|
return ops->unthrottle(event, self);
|
|
case PERF_RECORD_HEADER_ATTR:
|
|
return ops->attr(event, self);
|
|
case PERF_RECORD_HEADER_EVENT_TYPE:
|
|
return ops->event_type(event, self);
|
|
case PERF_RECORD_HEADER_TRACING_DATA:
|
|
/* setup for reading amidst mmap */
|
|
lseek(self->fd, offset + head, SEEK_SET);
|
|
return ops->tracing_data(event, self);
|
|
case PERF_RECORD_HEADER_BUILD_ID:
|
|
return ops->build_id(event, self);
|
|
case PERF_RECORD_FINISHED_ROUND:
|
|
return ops->finished_round(event, self, ops);
|
|
default:
|
|
++self->hists.stats.nr_unknown_events;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
void perf_event_header__bswap(struct perf_event_header *self)
|
|
{
|
|
self->type = bswap_32(self->type);
|
|
self->misc = bswap_16(self->misc);
|
|
self->size = bswap_16(self->size);
|
|
}
|
|
|
|
static struct thread *perf_session__register_idle_thread(struct perf_session *self)
|
|
{
|
|
struct thread *thread = perf_session__findnew(self, 0);
|
|
|
|
if (thread == NULL || thread__set_comm(thread, "swapper")) {
|
|
pr_err("problem inserting idle task.\n");
|
|
thread = NULL;
|
|
}
|
|
|
|
return thread;
|
|
}
|
|
|
|
int do_read(int fd, void *buf, size_t size)
|
|
{
|
|
void *buf_start = buf;
|
|
|
|
while (size) {
|
|
int ret = read(fd, buf, size);
|
|
|
|
if (ret <= 0)
|
|
return ret;
|
|
|
|
size -= ret;
|
|
buf += ret;
|
|
}
|
|
|
|
return buf - buf_start;
|
|
}
|
|
|
|
#define session_done() (*(volatile int *)(&session_done))
|
|
volatile int session_done;
|
|
|
|
static int __perf_session__process_pipe_events(struct perf_session *self,
|
|
struct perf_event_ops *ops)
|
|
{
|
|
event_t event;
|
|
uint32_t size;
|
|
int skip = 0;
|
|
u64 head;
|
|
int err;
|
|
void *p;
|
|
|
|
perf_event_ops__fill_defaults(ops);
|
|
|
|
head = 0;
|
|
more:
|
|
err = do_read(self->fd, &event, sizeof(struct perf_event_header));
|
|
if (err <= 0) {
|
|
if (err == 0)
|
|
goto done;
|
|
|
|
pr_err("failed to read event header\n");
|
|
goto out_err;
|
|
}
|
|
|
|
if (self->header.needs_swap)
|
|
perf_event_header__bswap(&event.header);
|
|
|
|
size = event.header.size;
|
|
if (size == 0)
|
|
size = 8;
|
|
|
|
p = &event;
|
|
p += sizeof(struct perf_event_header);
|
|
|
|
if (size - sizeof(struct perf_event_header)) {
|
|
err = do_read(self->fd, p,
|
|
size - sizeof(struct perf_event_header));
|
|
if (err <= 0) {
|
|
if (err == 0) {
|
|
pr_err("unexpected end of event stream\n");
|
|
goto done;
|
|
}
|
|
|
|
pr_err("failed to read event data\n");
|
|
goto out_err;
|
|
}
|
|
}
|
|
|
|
if (size == 0 ||
|
|
(skip = perf_session__process_event(self, &event, ops,
|
|
0, head)) < 0) {
|
|
dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
|
|
head, event.header.size, event.header.type);
|
|
/*
|
|
* assume we lost track of the stream, check alignment, and
|
|
* increment a single u64 in the hope to catch on again 'soon'.
|
|
*/
|
|
if (unlikely(head & 7))
|
|
head &= ~7ULL;
|
|
|
|
size = 8;
|
|
}
|
|
|
|
head += size;
|
|
|
|
dump_printf("\n%#Lx [%#x]: event: %d\n",
|
|
head, event.header.size, event.header.type);
|
|
|
|
if (skip > 0)
|
|
head += skip;
|
|
|
|
if (!session_done())
|
|
goto more;
|
|
done:
|
|
err = 0;
|
|
out_err:
|
|
return err;
|
|
}
|
|
|
|
int __perf_session__process_events(struct perf_session *self,
|
|
u64 data_offset, u64 data_size,
|
|
u64 file_size, struct perf_event_ops *ops)
|
|
{
|
|
int err, mmap_prot, mmap_flags;
|
|
u64 head, shift;
|
|
u64 offset = 0;
|
|
size_t page_size;
|
|
event_t *event;
|
|
uint32_t size;
|
|
char *buf;
|
|
struct ui_progress *progress = ui_progress__new("Processing events...",
|
|
self->size);
|
|
if (progress == NULL)
|
|
return -1;
|
|
|
|
perf_event_ops__fill_defaults(ops);
|
|
|
|
page_size = sysconf(_SC_PAGESIZE);
|
|
|
|
head = data_offset;
|
|
shift = page_size * (head / page_size);
|
|
offset += shift;
|
|
head -= shift;
|
|
|
|
mmap_prot = PROT_READ;
|
|
mmap_flags = MAP_SHARED;
|
|
|
|
if (self->header.needs_swap) {
|
|
mmap_prot |= PROT_WRITE;
|
|
mmap_flags = MAP_PRIVATE;
|
|
}
|
|
remap:
|
|
buf = mmap(NULL, page_size * self->mmap_window, mmap_prot,
|
|
mmap_flags, self->fd, offset);
|
|
if (buf == MAP_FAILED) {
|
|
pr_err("failed to mmap file\n");
|
|
err = -errno;
|
|
goto out_err;
|
|
}
|
|
|
|
more:
|
|
event = (event_t *)(buf + head);
|
|
ui_progress__update(progress, offset);
|
|
|
|
if (self->header.needs_swap)
|
|
perf_event_header__bswap(&event->header);
|
|
size = event->header.size;
|
|
if (size == 0)
|
|
size = 8;
|
|
|
|
if (head + event->header.size >= page_size * self->mmap_window) {
|
|
int munmap_ret;
|
|
|
|
shift = page_size * (head / page_size);
|
|
|
|
munmap_ret = munmap(buf, page_size * self->mmap_window);
|
|
assert(munmap_ret == 0);
|
|
|
|
offset += shift;
|
|
head -= shift;
|
|
goto remap;
|
|
}
|
|
|
|
size = event->header.size;
|
|
|
|
dump_printf("\n%#Lx [%#x]: event: %d\n",
|
|
offset + head, event->header.size, event->header.type);
|
|
|
|
if (size == 0 ||
|
|
perf_session__process_event(self, event, ops, offset, head) < 0) {
|
|
dump_printf("%#Lx [%#x]: skipping unknown header type: %d\n",
|
|
offset + head, event->header.size,
|
|
event->header.type);
|
|
/*
|
|
* assume we lost track of the stream, check alignment, and
|
|
* increment a single u64 in the hope to catch on again 'soon'.
|
|
*/
|
|
if (unlikely(head & 7))
|
|
head &= ~7ULL;
|
|
|
|
size = 8;
|
|
}
|
|
|
|
head += size;
|
|
|
|
if (offset + head >= data_offset + data_size)
|
|
goto done;
|
|
|
|
if (offset + head < file_size)
|
|
goto more;
|
|
done:
|
|
err = 0;
|
|
/* do the final flush for ordered samples */
|
|
self->ordered_samples.next_flush = ULLONG_MAX;
|
|
flush_sample_queue(self, ops);
|
|
out_err:
|
|
ui_progress__delete(progress);
|
|
return err;
|
|
}
|
|
|
|
int perf_session__process_events(struct perf_session *self,
|
|
struct perf_event_ops *ops)
|
|
{
|
|
int err;
|
|
|
|
if (perf_session__register_idle_thread(self) == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (!self->fd_pipe)
|
|
err = __perf_session__process_events(self,
|
|
self->header.data_offset,
|
|
self->header.data_size,
|
|
self->size, ops);
|
|
else
|
|
err = __perf_session__process_pipe_events(self, ops);
|
|
|
|
return err;
|
|
}
|
|
|
|
bool perf_session__has_traces(struct perf_session *self, const char *msg)
|
|
{
|
|
if (!(self->sample_type & PERF_SAMPLE_RAW)) {
|
|
pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int perf_session__set_kallsyms_ref_reloc_sym(struct map **maps,
|
|
const char *symbol_name,
|
|
u64 addr)
|
|
{
|
|
char *bracket;
|
|
enum map_type i;
|
|
struct ref_reloc_sym *ref;
|
|
|
|
ref = zalloc(sizeof(struct ref_reloc_sym));
|
|
if (ref == NULL)
|
|
return -ENOMEM;
|
|
|
|
ref->name = strdup(symbol_name);
|
|
if (ref->name == NULL) {
|
|
free(ref);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bracket = strchr(ref->name, ']');
|
|
if (bracket)
|
|
*bracket = '\0';
|
|
|
|
ref->addr = addr;
|
|
|
|
for (i = 0; i < MAP__NR_TYPES; ++i) {
|
|
struct kmap *kmap = map__kmap(maps[i]);
|
|
kmap->ref_reloc_sym = ref;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp)
|
|
{
|
|
return __dsos__fprintf(&self->host_machine.kernel_dsos, fp) +
|
|
__dsos__fprintf(&self->host_machine.user_dsos, fp) +
|
|
machines__fprintf_dsos(&self->machines, fp);
|
|
}
|
|
|
|
size_t perf_session__fprintf_dsos_buildid(struct perf_session *self, FILE *fp,
|
|
bool with_hits)
|
|
{
|
|
size_t ret = machine__fprintf_dsos_buildid(&self->host_machine, fp, with_hits);
|
|
return ret + machines__fprintf_dsos_buildid(&self->machines, fp, with_hits);
|
|
}
|