Use list of isolates in profiler

runtime/vm/thread_interrupter_linux.cc

 // Copyright (c) 2013, 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_LINUX)
 
 #include "vm/signal_handler.h"
 #include "vm/thread_interrupter.h"
 
 namespace dart {
 
 DECLARE_FLAG(bool, thread_interrupter);
 DECLARE_FLAG(bool, trace_thread_interrupter);
 
 class ThreadInterrupterLinux : public AllStatic {
  public:
   static void ThreadInterruptSignalHandler(int signal, siginfo_t* info,
                                            void* context_) {
     if (signal != SIGPROF) {
       return;
     }
-    ThreadInterrupter::ThreadState* state =
-        ThreadInterrupter::CurrentThreadState();
+    InterruptableThreadState* state = ThreadInterrupter::CurrentThreadState();
     if ((state == NULL) || (state->callback == NULL)) {
       // No interrupter state or callback.
       return;
     }
     ASSERT(Thread::Compare(state->id, Thread::GetCurrentThreadId()));
     // Extract thread state.
     ucontext_t* context = reinterpret_cast<ucontext_t*>(context_);
     mcontext_t mcontext = context->uc_mcontext;
     InterruptedThreadState its;
     its.tid = state->id;
     its.pc = SignalHandler::GetProgramCounter(mcontext);
     its.fp = SignalHandler::GetFramePointer(mcontext);
     its.sp = SignalHandler::GetStackPointer(mcontext);
     state->callback(its, state->data);
   }
 };
 
 
 void ThreadInterrupter::InterruptThreads(int64_t current_time) {
-  for (intptr_t i = 0; i < threads_size_; i++) {
-    ThreadState* state = threads_[i];
+  for (intptr_t i = 0; i < Isolate::isolates_size_; i++) {
+    Isolate* isolate = Isolate::isolates_[i];
+    ASSERT(isolate != NULL);
+    InterruptableThreadState* state = isolate->thread_state();
+    if (state == NULL) {
+      continue;
+    }
     ASSERT(state->id != Thread::kInvalidThreadId);
     if (FLAG_trace_thread_interrupter) {
       OS::Print("ThreadInterrupter interrupting %p\n",
                 reinterpret_cast<void*>(state->id));
     }
     pthread_kill(state->id, SIGPROF);
   }
 }
 
 
 void ThreadInterrupter::InstallSignalHandler() {
   SignalHandler::Install(ThreadInterrupterLinux::ThreadInterruptSignalHandler);
 }
 
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)