mirror of https://gitee.com/openkylin/linux.git
383 lines
8.1 KiB
C
383 lines
8.1 KiB
C
#include "../perf.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "session.h"
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#include "thread.h"
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#include "util.h"
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#include "debug.h"
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int find_all_tid(int pid, pid_t ** all_tid)
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{
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char name[256];
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int items;
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struct dirent **namelist = NULL;
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int ret = 0;
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int i;
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sprintf(name, "/proc/%d/task", pid);
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items = scandir(name, &namelist, NULL, NULL);
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if (items <= 0)
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return -ENOENT;
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*all_tid = malloc(sizeof(pid_t) * items);
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if (!*all_tid) {
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ret = -ENOMEM;
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goto failure;
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}
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for (i = 0; i < items; i++)
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(*all_tid)[i] = atoi(namelist[i]->d_name);
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ret = items;
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failure:
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for (i=0; i<items; i++)
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free(namelist[i]);
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free(namelist);
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return ret;
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}
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void map_groups__init(struct map_groups *self)
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{
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int i;
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for (i = 0; i < MAP__NR_TYPES; ++i) {
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self->maps[i] = RB_ROOT;
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INIT_LIST_HEAD(&self->removed_maps[i]);
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}
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}
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static struct thread *thread__new(pid_t pid)
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{
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struct thread *self = zalloc(sizeof(*self));
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if (self != NULL) {
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map_groups__init(&self->mg);
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self->pid = pid;
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self->comm = malloc(32);
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if (self->comm)
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snprintf(self->comm, 32, ":%d", self->pid);
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}
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return self;
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}
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static void map_groups__flush(struct map_groups *self)
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{
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int type;
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for (type = 0; type < MAP__NR_TYPES; type++) {
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struct rb_root *root = &self->maps[type];
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struct rb_node *next = rb_first(root);
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while (next) {
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struct map *pos = rb_entry(next, struct map, rb_node);
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next = rb_next(&pos->rb_node);
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rb_erase(&pos->rb_node, root);
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/*
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* We may have references to this map, for
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* instance in some hist_entry instances, so
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* just move them to a separate list.
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*/
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list_add_tail(&pos->node, &self->removed_maps[pos->type]);
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}
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}
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}
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int thread__set_comm(struct thread *self, const char *comm)
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{
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int err;
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if (self->comm)
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free(self->comm);
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self->comm = strdup(comm);
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err = self->comm == NULL ? -ENOMEM : 0;
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if (!err) {
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self->comm_set = true;
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map_groups__flush(&self->mg);
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}
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return err;
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}
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int thread__comm_len(struct thread *self)
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{
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if (!self->comm_len) {
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if (!self->comm)
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return 0;
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self->comm_len = strlen(self->comm);
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}
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return self->comm_len;
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}
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size_t __map_groups__fprintf_maps(struct map_groups *self,
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enum map_type type, FILE *fp)
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{
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size_t printed = fprintf(fp, "%s:\n", map_type__name[type]);
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struct rb_node *nd;
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for (nd = rb_first(&self->maps[type]); nd; nd = rb_next(nd)) {
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struct map *pos = rb_entry(nd, struct map, rb_node);
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printed += fprintf(fp, "Map:");
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printed += map__fprintf(pos, fp);
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if (verbose > 2) {
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printed += dso__fprintf(pos->dso, type, fp);
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printed += fprintf(fp, "--\n");
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}
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}
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return printed;
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}
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size_t map_groups__fprintf_maps(struct map_groups *self, FILE *fp)
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{
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size_t printed = 0, i;
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for (i = 0; i < MAP__NR_TYPES; ++i)
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printed += __map_groups__fprintf_maps(self, i, fp);
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return printed;
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}
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static size_t __map_groups__fprintf_removed_maps(struct map_groups *self,
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enum map_type type, FILE *fp)
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{
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struct map *pos;
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size_t printed = 0;
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list_for_each_entry(pos, &self->removed_maps[type], node) {
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printed += fprintf(fp, "Map:");
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printed += map__fprintf(pos, fp);
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if (verbose > 1) {
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printed += dso__fprintf(pos->dso, type, fp);
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printed += fprintf(fp, "--\n");
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}
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}
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return printed;
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}
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static size_t map_groups__fprintf_removed_maps(struct map_groups *self, FILE *fp)
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{
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size_t printed = 0, i;
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for (i = 0; i < MAP__NR_TYPES; ++i)
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printed += __map_groups__fprintf_removed_maps(self, i, fp);
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return printed;
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}
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static size_t map_groups__fprintf(struct map_groups *self, FILE *fp)
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{
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size_t printed = map_groups__fprintf_maps(self, fp);
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printed += fprintf(fp, "Removed maps:\n");
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return printed + map_groups__fprintf_removed_maps(self, fp);
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}
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static size_t thread__fprintf(struct thread *self, FILE *fp)
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{
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return fprintf(fp, "Thread %d %s\n", self->pid, self->comm) +
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map_groups__fprintf(&self->mg, fp);
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}
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struct thread *perf_session__findnew(struct perf_session *self, pid_t pid)
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{
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struct rb_node **p = &self->threads.rb_node;
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struct rb_node *parent = NULL;
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struct thread *th;
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/*
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* Font-end cache - PID lookups come in blocks,
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* so most of the time we dont have to look up
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* the full rbtree:
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*/
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if (self->last_match && self->last_match->pid == pid)
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return self->last_match;
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while (*p != NULL) {
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parent = *p;
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th = rb_entry(parent, struct thread, rb_node);
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if (th->pid == pid) {
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self->last_match = th;
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return th;
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}
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if (pid < th->pid)
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p = &(*p)->rb_left;
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else
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p = &(*p)->rb_right;
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}
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th = thread__new(pid);
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if (th != NULL) {
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rb_link_node(&th->rb_node, parent, p);
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rb_insert_color(&th->rb_node, &self->threads);
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self->last_match = th;
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}
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return th;
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}
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static int map_groups__fixup_overlappings(struct map_groups *self,
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struct map *map)
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{
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struct rb_root *root = &self->maps[map->type];
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struct rb_node *next = rb_first(root);
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while (next) {
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struct map *pos = rb_entry(next, struct map, rb_node);
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next = rb_next(&pos->rb_node);
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if (!map__overlap(pos, map))
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continue;
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if (verbose >= 2) {
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fputs("overlapping maps:\n", stderr);
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map__fprintf(map, stderr);
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map__fprintf(pos, stderr);
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}
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rb_erase(&pos->rb_node, root);
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/*
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* We may have references to this map, for instance in some
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* hist_entry instances, so just move them to a separate
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* list.
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*/
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list_add_tail(&pos->node, &self->removed_maps[map->type]);
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/*
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* Now check if we need to create new maps for areas not
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* overlapped by the new map:
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*/
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if (map->start > pos->start) {
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struct map *before = map__clone(pos);
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if (before == NULL)
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return -ENOMEM;
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before->end = map->start - 1;
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map_groups__insert(self, before);
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if (verbose >= 2)
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map__fprintf(before, stderr);
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}
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if (map->end < pos->end) {
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struct map *after = map__clone(pos);
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if (after == NULL)
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return -ENOMEM;
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after->start = map->end + 1;
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map_groups__insert(self, after);
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if (verbose >= 2)
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map__fprintf(after, stderr);
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}
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}
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return 0;
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}
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void maps__insert(struct rb_root *maps, struct map *map)
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{
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struct rb_node **p = &maps->rb_node;
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struct rb_node *parent = NULL;
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const u64 ip = map->start;
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struct map *m;
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while (*p != NULL) {
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parent = *p;
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m = rb_entry(parent, struct map, rb_node);
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if (ip < m->start)
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p = &(*p)->rb_left;
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else
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p = &(*p)->rb_right;
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}
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rb_link_node(&map->rb_node, parent, p);
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rb_insert_color(&map->rb_node, maps);
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}
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struct map *maps__find(struct rb_root *maps, u64 ip)
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{
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struct rb_node **p = &maps->rb_node;
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struct rb_node *parent = NULL;
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struct map *m;
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while (*p != NULL) {
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parent = *p;
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m = rb_entry(parent, struct map, rb_node);
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if (ip < m->start)
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p = &(*p)->rb_left;
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else if (ip > m->end)
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p = &(*p)->rb_right;
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else
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return m;
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}
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return NULL;
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}
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void thread__insert_map(struct thread *self, struct map *map)
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{
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map_groups__fixup_overlappings(&self->mg, map);
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map_groups__insert(&self->mg, map);
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}
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/*
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* XXX This should not really _copy_ te maps, but refcount them.
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*/
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static int map_groups__clone(struct map_groups *self,
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struct map_groups *parent, enum map_type type)
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{
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struct rb_node *nd;
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for (nd = rb_first(&parent->maps[type]); nd; nd = rb_next(nd)) {
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struct map *map = rb_entry(nd, struct map, rb_node);
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struct map *new = map__clone(map);
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if (new == NULL)
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return -ENOMEM;
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map_groups__insert(self, new);
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}
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return 0;
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}
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int thread__fork(struct thread *self, struct thread *parent)
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{
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int i;
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if (parent->comm_set) {
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if (self->comm)
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free(self->comm);
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self->comm = strdup(parent->comm);
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if (!self->comm)
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return -ENOMEM;
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self->comm_set = true;
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}
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for (i = 0; i < MAP__NR_TYPES; ++i)
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if (map_groups__clone(&self->mg, &parent->mg, i) < 0)
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return -ENOMEM;
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return 0;
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}
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size_t perf_session__fprintf(struct perf_session *self, FILE *fp)
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{
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size_t ret = 0;
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struct rb_node *nd;
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for (nd = rb_first(&self->threads); nd; nd = rb_next(nd)) {
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struct thread *pos = rb_entry(nd, struct thread, rb_node);
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ret += thread__fprintf(pos, fp);
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}
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return ret;
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}
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struct symbol *map_groups__find_symbol(struct map_groups *self,
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enum map_type type, u64 addr,
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symbol_filter_t filter)
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{
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struct map *map = map_groups__find(self, type, addr);
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if (map != NULL)
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return map__find_symbol(map, map->map_ip(map, addr), filter);
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return NULL;
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}
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