Initial GetSample implementation.

src/log.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdarg.h>
 
 #include "src/v8.h"
 
 #include "src/base/platform/platform.h"
 #include "src/bootstrapper.h"
@@ skipping 2042 matching lines @@
   if (Log::InitLogAtStart()) {
     is_logging_ = true;
   }
 
   if (FLAG_prof) {
     profiler_ = new Profiler(isolate);
     is_logging_ = true;
     profiler_->Engage();
   }
 
+  // TODO(gholap): This one's for the new sampler API. (include/v8-sampler.h)
+  //               Call to IncreaseProfilingDepth causes the
+  //               SIGPROF signal handler to be installed on the VM thread.
+  //               Figure out whether there's a way to only optionally
+  //               do this based on a runtime flag.
+  ticker_->IncreaseProfilingDepth();
+
   if (FLAG_log_internal_timer_events || FLAG_prof) timer_.Start();
 
   return true;
 }
 
 
 void Logger::SetCodeEventHandler(uint32_t options,
                                  JitCodeEventHandler event_handler) {
   if (jit_logger_) {
       removeCodeEventListener(jit_logger_);
@@ skipping 53 matching lines @@
   if (jit_logger_) {
     removeCodeEventListener(jit_logger_);
     delete jit_logger_;
     jit_logger_ = NULL;
   }
 
   return log_->Close();
 }
 
 } }  // namespace v8::internal