Sampling profiler

runtime/platform/thread_macos.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_MACOS)
 
 #include "platform/thread.h"
 
 #include <sys/errno.h>  // NOLINT
+#include <sys/types.h>  // NOLINT
+#include <sys/sysctl.h>  // NOLINT
+#include <mach/mach_init.h>  // NOLINT
+#include <mach/mach_host.h>  // NOLINT
+#include <mach/mach_port.h>  // NOLINT
+#include <mach/mach_traps.h>  // NOLINT
+#include <mach/task_info.h>  // NOLINT
+#include <mach/thread_info.h>  // NOLINT
+#include <mach/thread_act.h>  // NOLINT
 
 #include "platform/assert.h"
 
 namespace dart {
 
 #define VALIDATE_PTHREAD_RESULT(result)         \
   if (result != 0) { \
     const int kBufferSize = 1024; \
     char error_message[kBufferSize]; \
     strerror_r(result, error_message, kBufferSize); \
@@ skipping 100 matching lines @@
   VALIDATE_PTHREAD_RESULT(result);
 }
 
 
 intptr_t Thread::GetMaxStackSize() {
   const int kStackSize = (128 * kWordSize * KB);
   return kStackSize;
 }
 
 
+ThreadId Thread::GetCurrentThreadId() {
+  return pthread_self();
+}
+
+
+void Thread::GetThreadCPUUsage(int64_t* cpu_usage) {
+  ASSERT(cpu_usage != NULL);
+  mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
+  thread_basic_info_data_t info_data;
+  thread_basic_info_t info = &info_data;
+  mach_port_t thread_port = mach_thread_self();
+  kern_return_t r = thread_info(thread_port, THREAD_BASIC_INFO,
+                                (thread_info_t)info, &count);
+  mach_port_deallocate(mach_task_self(), thread_port);
+  if (r == KERN_SUCCESS) {
+    *cpu_usage = (info->user_time.seconds * kMicrosecondsPerSecond) +
+                 info->user_time.microseconds;
+    return;
+  }
+  *cpu_usage = 0;
+}
+
+
 Mutex::Mutex() {
   pthread_mutexattr_t attr;
   int result = pthread_mutexattr_init(&attr);
   VALIDATE_PTHREAD_RESULT(result);
 
 #if defined(DEBUG)
   result = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
   VALIDATE_PTHREAD_RESULT(result);
 #endif  // defined(DEBUG)
 
@@ skipping 106 matching lines @@
                                                     &ts);
     ASSERT((result == 0) || (result == ETIMEDOUT));
     if (result == ETIMEDOUT) {
       retval = kTimedOut;
     }
   }
   return retval;
 }
 
 
+Monitor::WaitResult Monitor::WaitMicros(int64_t micros) {
+  // TODO(iposva): Do we need to track lock owners?
+  Monitor::WaitResult retval = kNotified;
+  if (micros == 0) {

[siva, 2013/10/28 05:19:21]

ditto comment about using the named constant.

[Cutch, 2013/11/04 20:36:05]

Done.

+    // Wait forever.
+    int result = pthread_cond_wait(data_.cond(), data_.mutex());
+    VALIDATE_PTHREAD_RESULT(result);
+  } else {
+    struct timespec ts;
+    int64_t secs = micros / kMicrosecondsPerSecond;
+    int64_t nanos =
+        (micros - (secs * kMicrosecondsPerSecond)) * kNanosecondsPerMicrosecond;
+    ts.tv_sec = secs;
+    ts.tv_nsec = nanos;
+    int result = pthread_cond_timedwait_relative_np(data_.cond(),
+                                                    data_.mutex(),
+                                                    &ts);
+    ASSERT((result == 0) || (result == ETIMEDOUT));
+    if (result == ETIMEDOUT) {
+      retval = kTimedOut;
+    }

[siva, 2013/10/28 05:19:21]

else {
  VALIDATE_PTHREAD_RESULT(result);
}

[Cutch, 2013/11/04 20:36:05]

Above assert handles this.

+  }
+  return retval;
+}
+
+
 void Monitor::Notify() {
   // TODO(iposva): Do we need to track lock owners?
   int result = pthread_cond_signal(data_.cond());
   VALIDATE_PTHREAD_RESULT(result);
 }
 
 
 void Monitor::NotifyAll() {
   // TODO(iposva): Do we need to track lock owners?
   int result = pthread_cond_broadcast(data_.cond());
   VALIDATE_PTHREAD_RESULT(result);
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_MACOS)