C++ profiles processor: wire up to VM.

src/platform-win32.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1785 matching lines @@
 
   Sampler* sampler_;
   HANDLE sampler_thread_;
   HANDLE profiled_thread_;
 
   // Sampler thread handler.
   void Runner() {
     // Context used for sampling the register state of the profiled thread.
     CONTEXT context;
     memset(&context, 0, sizeof(context));
-    // Loop until the sampler is disengaged.
-    while (sampler_->IsActive()) {
-      TickSample sample;
+    // Loop until the sampler is disengaged, keeping the specified samling freq.
+    for ( ; sampler_->IsActive(); Sleep(sampler_->interval_)) {
+#ifdef ENABLE_CPP_PROFILES_PROCESSOR
+      if (Logger::state() == GC) continue;
+
+      TickSample* sample = NULL;
+#else
+      TickSample sample_obj, *sample = &sample_obj;
 
       // We always sample the VM state.
-      sample.state = Logger::state();
+      sample->state = Logger::state();
+#endif  // ENABLE_CPP_PROFILES_PROCESSOR
 
       // If profiling, we record the pc and sp of the profiled thread.
       if (sampler_->IsProfiling()
           && SuspendThread(profiled_thread_) != (DWORD)-1) {
         context.ContextFlags = CONTEXT_FULL;
         if (GetThreadContext(profiled_thread_, &context) != 0) {
+#ifdef ENABLE_CPP_PROFILES_PROCESSOR
+          sample = CpuProfiler::TickSampleEvent();
+#endif
+          if (sample != NULL) {
 #if V8_HOST_ARCH_X64
-          sample.pc = reinterpret_cast<Address>(context.Rip);
-          sample.sp = reinterpret_cast<Address>(context.Rsp);
-          sample.fp = reinterpret_cast<Address>(context.Rbp);
+            sample->pc = reinterpret_cast<Address>(context.Rip);
+            sample->sp = reinterpret_cast<Address>(context.Rsp);
+            sample->fp = reinterpret_cast<Address>(context.Rbp);
 #else
-          sample.pc = reinterpret_cast<Address>(context.Eip);
-          sample.sp = reinterpret_cast<Address>(context.Esp);
-          sample.fp = reinterpret_cast<Address>(context.Ebp);
+            sample->pc = reinterpret_cast<Address>(context.Eip);
+            sample->sp = reinterpret_cast<Address>(context.Esp);
+            sample->fp = reinterpret_cast<Address>(context.Ebp);
 #endif
-          sampler_->SampleStack(&sample);
+            sampler_->SampleStack(sample);
+          }
         }
         ResumeThread(profiled_thread_);
       }
 
+#ifndef ENABLE_CPP_PROFILES_PROCESSOR
       // Invoke tick handler with program counter and stack pointer.
-      sampler_->Tick(&sample);
-
-      // Wait until next sampling.
-      Sleep(sampler_->interval_);
+      sampler_->Tick(sample);
+#endif
     }
   }
 };
 
 
 // Entry point for sampler thread.
 static unsigned int __stdcall SamplerEntry(void* arg) {
   Sampler::PlatformData* data =
       reinterpret_cast<Sampler::PlatformData*>(arg);
   data->Runner();
@@ skipping 53 matching lines @@
 
   // Release the thread handles
   CloseHandle(data_->sampler_thread_);
   CloseHandle(data_->profiled_thread_);
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal