Sampling profiler

runtime/platform/thread_android.cc

Index: runtime/platform/thread_android.cc
diff --git a/runtime/platform/thread_android.cc b/runtime/platform/thread_android.cc
index 20e0e9ec5a4b564e626115aca041dd20cbd2a8ed..c8bca726058aeb33d0ebf8f415e0a82561704607 100644
--- a/runtime/platform/thread_android.cc
+++ b/runtime/platform/thread_android.cc
@@ -144,6 +144,22 @@ intptr_t Thread::GetMaxStackSize() {
 }
 
 
+ThreadId Thread::GetCurrentThreadId() {
+  return pthread_self();
+}
+
+
+void Thread::GetThreadCpuUsage(ThreadId thread_id, int64_t* cpu_usage) {
+  ASSERT(thread_id == GetCurrentThreadId());
+  ASSERT(cpu_usage != NULL);
+  struct timespec ts;
+  int r = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
+  ASSERT(r == 0);
+  *cpu_usage = (ts.tv_sec * kNanosecondsPerSecond + ts.tv_nsec) /
+               kNanosecondsPerMicrosecond;
+}
+
+
 Mutex::Mutex() {
   pthread_mutexattr_t attr;
   int result = pthread_mutexattr_init(&attr);