Split yet more runtime functions into separate files.

src/runtime/runtime-test.cc

 // Copyright 2014 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 "src/v8.h"
 
 #include "src/arguments.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen.h"
 #include "src/runtime/runtime.h"
@@ skipping 285 matching lines @@
 RUNTIME_FUNCTION(Runtime_GetV8Version) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 0);
 
   const char* version_string = v8::V8::GetVersion();
 
   return *isolate->factory()->NewStringFromAsciiChecked(version_string);
 }
 
 
+static int StackSize(Isolate* isolate) {
+  int n = 0;
+  for (JavaScriptFrameIterator it(isolate); !it.done(); it.Advance()) n++;
+  return n;
+}
+
+
+static void PrintTransition(Isolate* isolate, Object* result) {
+  // indentation
+  {
+    const int nmax = 80;
+    int n = StackSize(isolate);
+    if (n <= nmax)
+      PrintF("%4d:%*s", n, n, "");
+    else
+      PrintF("%4d:%*s", n, nmax, "...");
+  }
+
+  if (result == NULL) {
+    JavaScriptFrame::PrintTop(isolate, stdout, true, false);
+    PrintF(" {\n");
+  } else {
+    // function result
+    PrintF("} -> ");
+    result->ShortPrint();
+    PrintF("\n");
+  }
+}
+
+
+RUNTIME_FUNCTION(Runtime_TraceEnter) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 0);
+  PrintTransition(isolate, NULL);
+  return isolate->heap()->undefined_value();
+}
+
+
+RUNTIME_FUNCTION(Runtime_TraceExit) {
+  SealHandleScope shs(isolate);
+  DCHECK(args.length() == 1);
+  CONVERT_ARG_CHECKED(Object, obj, 0);
+  PrintTransition(isolate, obj);
+  return obj;  // return TOS
+}
+
+
 #ifdef DEBUG
 // ListNatives is ONLY used by the fuzz-natives.js in debug mode
 // Exclude the code in release mode.
 RUNTIME_FUNCTION(Runtime_ListNatives) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 0);
 #define COUNT_ENTRY(Name, argc, ressize) +1
   int entry_count =
       0 RUNTIME_FUNCTION_LIST(COUNT_ENTRY) INLINE_FUNCTION_LIST(COUNT_ENTRY)
       INLINE_OPTIMIZED_FUNCTION_LIST(COUNT_ENTRY);
@@ skipping 75 matching lines @@
   RUNTIME_FUNCTION(Runtime_HasFixed##Type##Elements) {                        \
     CONVERT_ARG_CHECKED(JSObject, obj, 0);                                    \
     return isolate->heap()->ToBoolean(obj->HasFixed##Type##Elements());       \
   }
 
 TYPED_ARRAYS(FIXED_TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION)
 
 #undef FIXED_TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION
 }
 }  // namespace v8::internal