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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/tools/perf/util/thread.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/tools/perf/util/thread.c')
-rw-r--r--kernel/tools/perf/util/thread.c232
1 files changed, 232 insertions, 0 deletions
diff --git a/kernel/tools/perf/util/thread.c b/kernel/tools/perf/util/thread.c
new file mode 100644
index 000000000..1c8fbc958
--- /dev/null
+++ b/kernel/tools/perf/util/thread.c
@@ -0,0 +1,232 @@
+#include "../perf.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "session.h"
+#include "thread.h"
+#include "thread-stack.h"
+#include "util.h"
+#include "debug.h"
+#include "comm.h"
+#include "unwind.h"
+
+int thread__init_map_groups(struct thread *thread, struct machine *machine)
+{
+ struct thread *leader;
+ pid_t pid = thread->pid_;
+
+ if (pid == thread->tid || pid == -1) {
+ thread->mg = map_groups__new(machine);
+ } else {
+ leader = machine__findnew_thread(machine, pid, pid);
+ if (leader)
+ thread->mg = map_groups__get(leader->mg);
+ }
+
+ return thread->mg ? 0 : -1;
+}
+
+struct thread *thread__new(pid_t pid, pid_t tid)
+{
+ char *comm_str;
+ struct comm *comm;
+ struct thread *thread = zalloc(sizeof(*thread));
+
+ if (thread != NULL) {
+ thread->pid_ = pid;
+ thread->tid = tid;
+ thread->ppid = -1;
+ thread->cpu = -1;
+ INIT_LIST_HEAD(&thread->comm_list);
+
+ if (unwind__prepare_access(thread) < 0)
+ goto err_thread;
+
+ comm_str = malloc(32);
+ if (!comm_str)
+ goto err_thread;
+
+ snprintf(comm_str, 32, ":%d", tid);
+ comm = comm__new(comm_str, 0, false);
+ free(comm_str);
+ if (!comm)
+ goto err_thread;
+
+ list_add(&comm->list, &thread->comm_list);
+
+ }
+
+ return thread;
+
+err_thread:
+ free(thread);
+ return NULL;
+}
+
+void thread__delete(struct thread *thread)
+{
+ struct comm *comm, *tmp;
+
+ thread_stack__free(thread);
+
+ if (thread->mg) {
+ map_groups__put(thread->mg);
+ thread->mg = NULL;
+ }
+ list_for_each_entry_safe(comm, tmp, &thread->comm_list, list) {
+ list_del(&comm->list);
+ comm__free(comm);
+ }
+ unwind__finish_access(thread);
+
+ free(thread);
+}
+
+struct thread *thread__get(struct thread *thread)
+{
+ ++thread->refcnt;
+ return thread;
+}
+
+void thread__put(struct thread *thread)
+{
+ if (thread && --thread->refcnt == 0) {
+ list_del_init(&thread->node);
+ thread__delete(thread);
+ }
+}
+
+struct comm *thread__comm(const struct thread *thread)
+{
+ if (list_empty(&thread->comm_list))
+ return NULL;
+
+ return list_first_entry(&thread->comm_list, struct comm, list);
+}
+
+struct comm *thread__exec_comm(const struct thread *thread)
+{
+ struct comm *comm, *last = NULL;
+
+ list_for_each_entry(comm, &thread->comm_list, list) {
+ if (comm->exec)
+ return comm;
+ last = comm;
+ }
+
+ return last;
+}
+
+int __thread__set_comm(struct thread *thread, const char *str, u64 timestamp,
+ bool exec)
+{
+ struct comm *new, *curr = thread__comm(thread);
+ int err;
+
+ /* Override the default :tid entry */
+ if (!thread->comm_set) {
+ err = comm__override(curr, str, timestamp, exec);
+ if (err)
+ return err;
+ } else {
+ new = comm__new(str, timestamp, exec);
+ if (!new)
+ return -ENOMEM;
+ list_add(&new->list, &thread->comm_list);
+
+ if (exec)
+ unwind__flush_access(thread);
+ }
+
+ thread->comm_set = true;
+
+ return 0;
+}
+
+const char *thread__comm_str(const struct thread *thread)
+{
+ const struct comm *comm = thread__comm(thread);
+
+ if (!comm)
+ return NULL;
+
+ return comm__str(comm);
+}
+
+/* CHECKME: it should probably better return the max comm len from its comm list */
+int thread__comm_len(struct thread *thread)
+{
+ if (!thread->comm_len) {
+ const char *comm = thread__comm_str(thread);
+ if (!comm)
+ return 0;
+ thread->comm_len = strlen(comm);
+ }
+
+ return thread->comm_len;
+}
+
+size_t thread__fprintf(struct thread *thread, FILE *fp)
+{
+ return fprintf(fp, "Thread %d %s\n", thread->tid, thread__comm_str(thread)) +
+ map_groups__fprintf(thread->mg, fp);
+}
+
+void thread__insert_map(struct thread *thread, struct map *map)
+{
+ map_groups__fixup_overlappings(thread->mg, map, stderr);
+ map_groups__insert(thread->mg, map);
+}
+
+static int thread__clone_map_groups(struct thread *thread,
+ struct thread *parent)
+{
+ int i;
+
+ /* This is new thread, we share map groups for process. */
+ if (thread->pid_ == parent->pid_)
+ return 0;
+
+ /* But this one is new process, copy maps. */
+ for (i = 0; i < MAP__NR_TYPES; ++i)
+ if (map_groups__clone(thread->mg, parent->mg, i) < 0)
+ return -ENOMEM;
+
+ return 0;
+}
+
+int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
+{
+ int err;
+
+ if (parent->comm_set) {
+ const char *comm = thread__comm_str(parent);
+ if (!comm)
+ return -ENOMEM;
+ err = thread__set_comm(thread, comm, timestamp);
+ if (err)
+ return err;
+ }
+
+ thread->ppid = parent->tid;
+ return thread__clone_map_groups(thread, parent);
+}
+
+void thread__find_cpumode_addr_location(struct thread *thread,
+ enum map_type type, u64 addr,
+ struct addr_location *al)
+{
+ size_t i;
+ const u8 const cpumodes[] = {
+ PERF_RECORD_MISC_USER,
+ PERF_RECORD_MISC_KERNEL,
+ PERF_RECORD_MISC_GUEST_USER,
+ PERF_RECORD_MISC_GUEST_KERNEL
+ };
+
+ for (i = 0; i < ARRAY_SIZE(cpumodes); i++) {
+ thread__find_addr_location(thread, cpumodes[i], type, addr, al);
+ if (al->map)
+ break;
+ }
+}