[Fuchsia] Implements the thread interrupter for CPU profiling.

runtime/vm/os_thread_fuchsia.cc

 // Copyright (c) 2016, 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"  // NOLINT
 #if defined(HOST_OS_FUCHSIA)
 
 #include "vm/os_thread.h"
 #include "vm/os_thread_fuchsia.h"
 
 #include <errno.h>  // NOLINT
 #include <magenta/syscalls.h>
+#include <magenta/syscalls/object.h>
+#include <magenta/threads.h>
 #include <magenta/types.h>
 
 #include "platform/assert.h"
 
 namespace dart {
 
 #define VALIDATE_PTHREAD_RESULT(result)                                        \
   if (result != 0) {                                                           \
     FATAL1("pthread error: %d", result);                                       \
   }
@@ skipping 91 matching lines @@
   result = pthread_create(&tid, &attr, ThreadStart, data);
   RETURN_ON_PTHREAD_FAILURE(result);
 
   result = pthread_attr_destroy(&attr);
   RETURN_ON_PTHREAD_FAILURE(result);
 
   return 0;
 }
 
 
-const ThreadId OSThread::kInvalidThreadId = static_cast<ThreadId>(0);
+const ThreadId OSThread::kInvalidThreadId = MX_KOID_INVALID;
 const ThreadJoinId OSThread::kInvalidThreadJoinId =
     static_cast<ThreadJoinId>(0);
 
 
 ThreadLocalKey OSThread::CreateThreadLocal(ThreadDestructor destructor) {
   pthread_key_t key = kUnsetThreadLocalKey;
   int result = pthread_key_create(&key, destructor);
   VALIDATE_PTHREAD_RESULT(result);
   ASSERT(key != kUnsetThreadLocalKey);
   return key;
@@ skipping 14 matching lines @@
 }
 
 
 intptr_t OSThread::GetMaxStackSize() {
   const int kStackSize = (128 * kWordSize * KB);
   return kStackSize;
 }
 
 
 ThreadId OSThread::GetCurrentThreadId() {
-  return pthread_self();
+  mx_info_handle_basic_t info;
+  mx_handle_t thread_handle = thrd_get_mx_handle(thrd_current());
+  mx_status_t status =
+      mx_object_get_info(thread_handle, MX_INFO_HANDLE_BASIC, &info,
+                         sizeof(info), nullptr, nullptr);
+  return status == NO_ERROR ? info.koid : MX_KOID_INVALID;
 }
 
 
 #ifndef PRODUCT
 ThreadId OSThread::GetCurrentThreadTraceId() {
   return pthread_self();
 }
 #endif  // PRODUCT
 
 
@@ skipping 254 matching lines @@
 void Monitor::NotifyAll() {
   // When running with assertions enabled we track the owner.
   ASSERT(IsOwnedByCurrentThread());
   int result = pthread_cond_broadcast(data_.cond());
   VALIDATE_PTHREAD_RESULT(result);
 }
 
 }  // namespace dart
 
 #endif  // defined(HOST_OS_FUCHSIA)