Initial GetSample implementation.

src/log.cc

Index: src/log.cc
diff --git a/src/log.cc b/src/log.cc
index 6d88a535dc78f4ce10ce7a578d56d1b7b32b4e7c..6262748203fd2ffddea02a220e76afe8290be19a 100644
--- a/src/log.cc
+++ b/src/log.cc
@@ -16,6 +16,7 @@
 #include "src/log-utils.h"
 #include "src/macro-assembler.h"
 #include "src/runtime-profiler.h"
+#include "src/sampler.h"
 #include "src/serialize.h"
 #include "src/string-stream.h"
 #include "src/vm-state-inl.h"
@@ -23,7 +24,6 @@
 namespace v8 {
 namespace internal {
 
-
 #define DECLARE_EVENT(ignore1, name) name,
 static const char* const kLogEventsNames[Logger::NUMBER_OF_LOG_EVENTS] = {
   LOG_EVENTS_AND_TAGS_LIST(DECLARE_EVENT)
@@ -1720,7 +1720,7 @@ void Logger::TickEvent(TickSample* sample, bool overflow) {
   }
   for (unsigned i = 0; i < sample->frames_count; ++i) {
     msg.Append(',');
-    msg.AppendAddress(sample->stack[i]);
+    msg.AppendAddress(static_cast<Address>(sample->stack[i]));
   }
   msg.Append('\n');
   msg.WriteToLogFile();
@@ -2060,6 +2060,11 @@ bool Logger::SetUp(Isolate* isolate) {
     profiler_->Engage();
   }
 
+  // This one's for the new sampler API. (include/v8.h)
+  if (FLAG_new_sampler_api) {
+    Sampler::SetUpForNewSamplingAPI();
+  }
+
   if (FLAG_log_internal_timer_events || FLAG_prof) timer_.Start();
 
   return true;