Sampling profiler

runtime/vm/isolate.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 "vm/isolate.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/json.h"
 #include "lib/mirrors.h"
 #include "vm/code_observers.h"
 #include "vm/compiler_stats.h"
 #include "vm/coverage.h"
 #include "vm/dart_api_state.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
 #include "vm/deopt_instructions.h"
 #include "vm/heap.h"
 #include "vm/heap_histogram.h"
 #include "vm/message_handler.h"
 #include "vm/object_id_ring.h"
 #include "vm/object_store.h"
 #include "vm/parser.h"
 #include "vm/port.h"
+#include "vm/profiler.h"
 #include "vm/reusable_handles.h"
 #include "vm/service.h"
+#include "vm/signal_handler.h"
 #include "vm/simulator.h"
 #include "vm/stack_frame.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 #include "vm/thread.h"
 #include "vm/timer.h"
 #include "vm/visitor.h"
 
 
 namespace dart {
@@ skipping 263 matching lines @@
       spawn_data_(0),
       is_runnable_(false),
       gc_prologue_callbacks_(),
       gc_epilogue_callbacks_(),
       defer_finalization_count_(0),
       deopt_context_(NULL),
       stacktrace_(NULL),
       stack_frame_index_(-1),
       object_histogram_(NULL),
       object_id_ring_(NULL),
+      profiler_data_(NULL),
+      profiler_data_mutex_(new Mutex()),
       REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_INITIALIZERS)
       reusable_handles_() {
   if (FLAG_print_object_histogram && (Dart::vm_isolate() != NULL)) {
     object_histogram_ = new ObjectHistogram(this);
   }
 }
 #undef REUSABLE_HANDLE_INITIALIZERS
 
 
 Isolate::~Isolate() {
   delete [] name_;
   delete heap_;
   delete object_store_;
   delete api_state_;
   delete stub_code_;
   delete debugger_;
 #if defined(USING_SIMULATOR)
   delete simulator_;
 #endif
   delete mutex_;
   mutex_ = NULL;  // Fail fast if interrupts are scheduled on a dead isolate.
+  delete profiler_data_mutex_;
+  profiler_data_mutex_ = NULL;
   delete message_handler_;
   message_handler_ = NULL;  // Fail fast if we send messages to a dead isolate.
   ASSERT(deopt_context_ == NULL);  // No deopt in progress when isolate deleted.
   delete object_histogram_;
 }
 
 void Isolate::SetCurrent(Isolate* current) {
+  ScopedSignalBlocker ssb;
+  Isolate* old_isolate = Current();
+  if (old_isolate != NULL) {
+    ProfilerManager::DescheduleIsolate(old_isolate);
+  }
   Thread::SetThreadLocal(isolate_key, reinterpret_cast<uword>(current));
+  if (current != NULL) {
+    ProfilerManager::ScheduleIsolate(current);
+  }
 }
 
 
 // The single thread local key which stores all the thread local data
 // for a thread. Since an Isolate is the central repository for
 // storing all isolate specific information a single thread local key
 // is sufficient.
 ThreadLocalKey Isolate::isolate_key = Thread::kUnsetThreadLocalKey;
 
 
 void Isolate::InitOnce() {
   ASSERT(isolate_key == Thread::kUnsetThreadLocalKey);
   isolate_key = Thread::CreateThreadLocal();
   ASSERT(isolate_key != Thread::kUnsetThreadLocalKey);
   create_callback_ = NULL;
 }
 
 
 Isolate* Isolate::Init(const char* name_prefix) {
   Isolate* result = new Isolate();
   ASSERT(result != NULL);
 
+  // Setup for profiling.
+  ProfilerManager::SetupIsolateForProfiling(result);
+
   // TODO(5411455): For now just set the recently created isolate as
   // the current isolate.
   SetCurrent(result);
 
   // Setup the isolate specific resuable handles.
 #define REUSABLE_HANDLE_ALLOCATION(object)                                     \
   result->object##_handle_ = result->AllocateReusableHandle<object>();         \
 
   REUSABLE_HANDLE_LIST(REUSABLE_HANDLE_ALLOCATION)
 #undef REUSABLE_HANDLE_ALLOCATION
@@ skipping 272 matching lines @@
 void Isolate::Shutdown() {
   ASSERT(this == Isolate::Current());
   ASSERT(top_resource() == NULL);
   ASSERT((heap_ == NULL) || heap_->Verify());
 
   // Create an area where we do have a zone and a handle scope so that we can
   // call VM functions while tearing this isolate down.
   {
     StackZone stack_zone(this);
     HandleScope handle_scope(this);
+    #if 0
+    ScopedSignalBlocker ssb;
+
+    ProfilerManager::DescheduleIsolate(this);
+
+    ProfilerManager::WriteTracing(this, this->name(), this->main_port());
+    #endif

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

Why is this #ifdefed out.

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

Debug only dumping of data in about:tracing format.

+
 
     if (FLAG_print_object_histogram) {
       heap()->CollectAllGarbage();
       object_histogram()->Print();
     }
 
     // Clean up debugger resources.
     debugger()->Shutdown();
 
     // Close all the ports owned by this isolate.
@@ skipping 22 matching lines @@
       megamorphic_cache_table()->PrintSizes();
       Symbols::DumpStats();
       OS::Print("[-] Stopping isolate:\n"
                 "\tisolate:    %s\n", name());
     }
   }
 
   // TODO(5411455): For now just make sure there are no current isolates
   // as we are shutting down the isolate.
   SetCurrent(NULL);
+  ProfilerManager::ShutdownIsolate(this);
 }
 
 
 Dart_IsolateCreateCallback Isolate::create_callback_ = NULL;
 Dart_IsolateInterruptCallback Isolate::interrupt_callback_ = NULL;
 Dart_IsolateUnhandledExceptionCallback
     Isolate::unhandled_exception_callback_ = NULL;
 Dart_IsolateShutdownCallback Isolate::shutdown_callback_ = NULL;
 Dart_FileOpenCallback Isolate::file_open_callback_ = NULL;
 Dart_FileReadCallback Isolate::file_read_callback_ = NULL;
@@ skipping 346 matching lines @@
   return func.raw();
 }
 
 
 void IsolateSpawnState::Cleanup() {
   SwitchIsolateScope switch_scope(isolate());
   Dart::ShutdownIsolate();
 }
 
 }  // namespace dart