#include <linux/string.h>
#include <linux/zalloc.h>
-struct thread_rb_node {
- struct rb_node rb_node;
- struct thread *thread;
-};
-
-static struct threads_table_entry *threads__table(struct threads *threads, pid_t tid)
-{
- /* Cast it to handle tid == -1 */
- return &threads->table[(unsigned int)tid % THREADS__TABLE_SIZE];
-}
-
static struct dso *machine__kernel_dso(struct machine *machine)
{
return map__dso(machine->vmlinux_map);
init_rwsem(&dsos->lock);
}
-void threads__init(struct threads *threads)
-{
- for (int i = 0; i < THREADS__TABLE_SIZE; i++) {
- struct threads_table_entry *table = &threads->table[i];
-
- table->entries = RB_ROOT_CACHED;
- init_rwsem(&table->lock);
- table->nr = 0;
- table->last_match = NULL;
- }
-}
-
static int machine__set_mmap_name(struct machine *machine)
{
if (machine__is_host(machine))
exit_rwsem(&dsos->lock);
}
-static void __threads_table_entry__set_last_match(struct threads_table_entry *table,
- struct thread *th);
-
-void threads__remove_all_threads(struct threads *threads)
-{
- for (int i = 0; i < THREADS__TABLE_SIZE; i++) {
- struct threads_table_entry *table = &threads->table[i];
- struct rb_node *nd;
-
- down_write(&table->lock);
- __threads_table_entry__set_last_match(table, NULL);
- nd = rb_first_cached(&table->entries);
- while (nd) {
- struct thread_rb_node *trb = rb_entry(nd, struct thread_rb_node, rb_node);
-
- nd = rb_next(nd);
- thread__put(trb->thread);
- rb_erase_cached(&trb->rb_node, &table->entries);
- RB_CLEAR_NODE(&trb->rb_node);
- --table->nr;
-
- free(trb);
- }
- assert(table->nr == 0);
- up_write(&table->lock);
- }
-}
-
void machine__delete_threads(struct machine *machine)
{
threads__remove_all_threads(&machine->threads);
}
-void threads__exit(struct threads *threads)
-{
- threads__remove_all_threads(threads);
- for (int i = 0; i < THREADS__TABLE_SIZE; i++) {
- struct threads_table_entry *table = &threads->table[i];
-
- exit_rwsem(&table->lock);
- }
-}
-
void machine__exit(struct machine *machine)
{
if (machine == NULL)
goto out_put;
}
-/*
- * Front-end cache - TID lookups come in blocks,
- * so most of the time we dont have to look up
- * the full rbtree:
- */
-static struct thread *__threads_table_entry__get_last_match(struct threads_table_entry *table,
- pid_t tid)
-{
- struct thread *th, *res = NULL;
-
- th = table->last_match;
- if (th != NULL) {
- if (thread__tid(th) == tid)
- res = thread__get(th);
- }
- return res;
-}
-
-static void __threads_table_entry__set_last_match(struct threads_table_entry *table,
- struct thread *th)
-{
- thread__put(table->last_match);
- table->last_match = thread__get(th);
-}
-
-static void threads_table_entry__set_last_match(struct threads_table_entry *table,
- struct thread *th)
-{
- down_write(&table->lock);
- __threads_table_entry__set_last_match(table, th);
- up_write(&table->lock);
-}
-
-struct thread *threads__find(struct threads *threads, pid_t tid)
-{
- struct threads_table_entry *table = threads__table(threads, tid);
- struct rb_node **p;
- struct thread *res = NULL;
-
- down_read(&table->lock);
- res = __threads_table_entry__get_last_match(table, tid);
- if (res)
- return res;
-
- p = &table->entries.rb_root.rb_node;
- while (*p != NULL) {
- struct rb_node *parent = *p;
- struct thread *th = rb_entry(parent, struct thread_rb_node, rb_node)->thread;
-
- if (thread__tid(th) == tid) {
- res = thread__get(th);
- break;
- }
-
- if (tid < thread__tid(th))
- p = &(*p)->rb_left;
- else
- p = &(*p)->rb_right;
- }
- up_read(&table->lock);
- if (res)
- threads_table_entry__set_last_match(table, res);
- return res;
-}
-
-struct thread *threads__findnew(struct threads *threads, pid_t pid, pid_t tid, bool *created)
-{
- struct threads_table_entry *table = threads__table(threads, tid);
- struct rb_node **p;
- struct rb_node *parent = NULL;
- struct thread *res = NULL;
- struct thread_rb_node *nd;
- bool leftmost = true;
-
- *created = false;
- down_write(&table->lock);
- p = &table->entries.rb_root.rb_node;
- while (*p != NULL) {
- struct thread *th;
-
- parent = *p;
- th = rb_entry(parent, struct thread_rb_node, rb_node)->thread;
-
- if (thread__tid(th) == tid) {
- __threads_table_entry__set_last_match(table, th);
- res = thread__get(th);
- goto out_unlock;
- }
-
- if (tid < thread__tid(th))
- p = &(*p)->rb_left;
- else {
- p = &(*p)->rb_right;
- leftmost = false;
- }
- }
- nd = malloc(sizeof(*nd));
- if (nd == NULL)
- goto out_unlock;
- res = thread__new(pid, tid);
- if (!res)
- free(nd);
- else {
- *created = true;
- nd->thread = thread__get(res);
- rb_link_node(&nd->rb_node, parent, p);
- rb_insert_color_cached(&nd->rb_node, &table->entries, leftmost);
- ++table->nr;
- __threads_table_entry__set_last_match(table, res);
- }
-out_unlock:
- up_write(&table->lock);
- return res;
-}
-
/*
* Caller must eventually drop thread->refcnt returned with a successful
* lookup/new thread inserted.
machine__update_thread_pid(machine, th, pid);
return th;
}
-
if (!create)
return NULL;
return 0;
}
-size_t threads__nr(struct threads *threads)
-{
- size_t nr = 0;
-
- for (int i = 0; i < THREADS__TABLE_SIZE; i++) {
- struct threads_table_entry *table = &threads->table[i];
-
- down_read(&table->lock);
- nr += table->nr;
- up_read(&table->lock);
- }
- return nr;
-}
-
size_t machine__fprintf(struct machine *machine, FILE *fp)
{
struct machine_fprintf_cb_args args = {
return 0;
}
-void threads__remove(struct threads *threads, struct thread *thread)
-{
- struct rb_node **p;
- struct threads_table_entry *table = threads__table(threads, thread__tid(thread));
- pid_t tid = thread__tid(thread);
-
- down_write(&table->lock);
- if (table->last_match && RC_CHK_EQUAL(table->last_match, thread))
- __threads_table_entry__set_last_match(table, NULL);
-
- p = &table->entries.rb_root.rb_node;
- while (*p != NULL) {
- struct rb_node *parent = *p;
- struct thread_rb_node *nd = rb_entry(parent, struct thread_rb_node, rb_node);
- struct thread *th = nd->thread;
-
- if (RC_CHK_EQUAL(th, thread)) {
- thread__put(nd->thread);
- rb_erase_cached(&nd->rb_node, &table->entries);
- RB_CLEAR_NODE(&nd->rb_node);
- --table->nr;
- free(nd);
- break;
- }
-
- if (tid < thread__tid(th))
- p = &(*p)->rb_left;
- else
- p = &(*p)->rb_right;
- }
- up_write(&table->lock);
-}
-
void machine__remove_thread(struct machine *machine, struct thread *th)
{
return threads__remove(&machine->threads, th);
return ret;
}
-int threads__for_each_thread(struct threads *threads,
- int (*fn)(struct thread *thread, void *data),
- void *data)
-{
- for (int i = 0; i < THREADS__TABLE_SIZE; i++) {
- struct threads_table_entry *table = &threads->table[i];
- struct rb_node *nd;
-
- down_read(&table->lock);
- for (nd = rb_first_cached(&table->entries); nd; nd = rb_next(nd)) {
- struct thread_rb_node *trb = rb_entry(nd, struct thread_rb_node, rb_node);
- int rc = fn(trb->thread, data);
-
- if (rc != 0) {
- up_read(&table->lock);
- return rc;
- }
- }
- up_read(&table->lock);
- }
- return 0;
-
-}
-
int machine__for_each_thread(struct machine *machine,
int (*fn)(struct thread *thread, void *p),
void *priv)
projects / linux-2.6-microblaze.git / blobdiff