Integrate Chrome tracing with V8 (WIP)

src/tracing/event-tracer.cc

Index: src/tracing/event-tracer.cc
diff --git a/test/mjsunit/regress/regress-3218915.js b/src/tracing/event-tracer.cc
similarity index 55%
copy from test/mjsunit/regress/regress-3218915.js
copy to src/tracing/event-tracer.cc
index 4b08a6e82508309459ff5dc18d4994fad76effe3..6ed92ba5f08432f615fc6bfb4a2bf10547982dab 100644
--- a/test/mjsunit/regress/regress-3218915.js
+++ b/src/tracing/event-tracer.cc
@@ -1,4 +1,4 @@
-// Copyright 2010 the V8 project authors. All rights reserved.
+// Copyright 2015 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:
@@ -25,22 +25,47 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax
+#include <include/v8-tracing.h>
+#include <stdio.h>
+#ifndef NULL
+#define NULL (0)
+#endif
 
-// Checks that comma expression in conditional context is processed correctly.
+class DefaultEventTracer : public v8::EventTracer {
+  virtual v8::EventTracer::Handle addTraceEvent(
+      char phase, const uint8_t* categoryEnabledFlag, const char* name,
+      uint64_t id, int numArgs, const char** argNames, const uint8_t* argTypes,
+      const uint64_t* argValues, uint8_t flags) {
+    return 0;
+  }
+
+  virtual void updateTraceEventDuration(const uint8_t* categoryEnabledFlag,
+                                        const char* name,
+                                        EventTracer::Handle handle) {}
 
-function withCommaExpressionInConditional(x) {
-  if (x > 1000) { for (var i = 0; i < 10000; i++) { } }
-  var y;
-  if (y = x, y > 1) {
-    return 'big';
+  virtual const uint8_t* getCategoryGroupEnabled(const char* name) {
+    static uint8_t no = 0x7;
+    return &no;
+  }
+
+  virtual const char* getCategoryGroupName(const uint8_t* categoryEnabledFlag) {
+    static const char* dummy = "V8";
+    return dummy;
+  }
+};
+
+v8::EventTracer* v8::EventTracer::gInstance;
+
+static void intialize_default_tracer(v8::EventTracer* current_instance) {
+  if (NULL == current_instance) {
+    v8::EventTracer::SetInstance(new (DefaultEventTracer));
   }
-  return (y = x + 1, y > 1) ? 'medium' : 'small';
 }
 
-for (var i = 0; i < 5; i++) {
-  withCommaExpressionInConditional(i);
+
+v8::EventTracer* v8::EventTracer::GetInstance() {
+  if (NULL == v8::EventTracer::gInstance) {
+    intialize_default_tracer(NULL);
+  }
+  return v8::EventTracer::gInstance;
 }
-%OptimizeFunctionOnNextCall(withCommaExpressionInConditional);
-withCommaExpressionInConditional(i);
-withCommaExpressionInConditional("1")