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authorFrederic Weisbecker <fweisbec@gmail.com>2009-08-14 12:21:53 +0200
committerIngo Molnar <mingo@elte.hu>2009-08-15 16:10:19 +0200
commit6baa0a5ae0954fb2486c480a20556a9f1aee0965 (patch)
treeb85e485562b34b222153d41414dec655724e26b8 /tools/perf/util/thread.c
parentbe750231ce1599b86fbba213e3da8344ece262e2 (diff)
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perf tools: Factorize the thread code in a dedicated file
Factorize the thread management code used by perf-annotate and perf-report in dedicated source and header files. v2: pass last_match by address so that it can actually be modified. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <1250245313-6995-1-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'tools/perf/util/thread.c')
-rw-r--r--tools/perf/util/thread.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
new file mode 100644
index 0000000..00c14b9
--- /dev/null
+++ b/tools/perf/util/thread.c
@@ -0,0 +1,143 @@
+#include "../perf.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "thread.h"
+#include "util.h"
+
+static struct thread *thread__new(pid_t pid)
+{
+ struct thread *self = malloc(sizeof(*self));
+
+ if (self != NULL) {
+ self->pid = pid;
+ self->comm = malloc(32);
+ if (self->comm)
+ snprintf(self->comm, 32, ":%d", self->pid);
+ INIT_LIST_HEAD(&self->maps);
+ }
+
+ return self;
+}
+
+int thread__set_comm(struct thread *self, const char *comm)
+{
+ if (self->comm)
+ free(self->comm);
+ self->comm = strdup(comm);
+ return self->comm ? 0 : -ENOMEM;
+}
+
+static size_t thread__fprintf(struct thread *self, FILE *fp)
+{
+ struct map *pos;
+ size_t ret = fprintf(fp, "Thread %d %s\n", self->pid, self->comm);
+
+ list_for_each_entry(pos, &self->maps, node)
+ ret += map__fprintf(pos, fp);
+
+ return ret;
+}
+
+struct thread *
+threads__findnew(pid_t pid, struct rb_root *threads, struct thread **last_match)
+{
+ struct rb_node **p = &threads->rb_node;
+ struct rb_node *parent = NULL;
+ struct thread *th;
+
+ /*
+ * Font-end cache - PID lookups come in blocks,
+ * so most of the time we dont have to look up
+ * the full rbtree:
+ */
+ if (*last_match && (*last_match)->pid == pid)
+ return *last_match;
+
+ while (*p != NULL) {
+ parent = *p;
+ th = rb_entry(parent, struct thread, rb_node);
+
+ if (th->pid == pid) {
+ *last_match = th;
+ return th;
+ }
+
+ if (pid < th->pid)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ th = thread__new(pid);
+ if (th != NULL) {
+ rb_link_node(&th->rb_node, parent, p);
+ rb_insert_color(&th->rb_node, threads);
+ *last_match = th;
+ }
+
+ return th;
+}
+
+void thread__insert_map(struct thread *self, struct map *map)
+{
+ struct map *pos, *tmp;
+
+ list_for_each_entry_safe(pos, tmp, &self->maps, node) {
+ if (map__overlap(pos, map)) {
+ list_del_init(&pos->node);
+ /* XXX leaks dsos */
+ free(pos);
+ }
+ }
+
+ list_add_tail(&map->node, &self->maps);
+}
+
+int thread__fork(struct thread *self, struct thread *parent)
+{
+ struct map *map;
+
+ if (self->comm)
+ free(self->comm);
+ self->comm = strdup(parent->comm);
+ if (!self->comm)
+ return -ENOMEM;
+
+ list_for_each_entry(map, &parent->maps, node) {
+ struct map *new = map__clone(map);
+ if (!new)
+ return -ENOMEM;
+ thread__insert_map(self, new);
+ }
+
+ return 0;
+}
+
+struct map *thread__find_map(struct thread *self, u64 ip)
+{
+ struct map *pos;
+
+ if (self == NULL)
+ return NULL;
+
+ list_for_each_entry(pos, &self->maps, node)
+ if (ip >= pos->start && ip <= pos->end)
+ return pos;
+
+ return NULL;
+}
+
+size_t threads__fprintf(FILE *fp, struct rb_root *threads)
+{
+ size_t ret = 0;
+ struct rb_node *nd;
+
+ for (nd = rb_first(threads); nd; nd = rb_next(nd)) {
+ struct thread *pos = rb_entry(nd, struct thread, rb_node);
+
+ ret += thread__fprintf(pos, fp);
+ }
+
+ return ret;
+}