Dump more stack frames to perf log when executing a C++ function.

src/platform.h

 // 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 463 matching lines @@
     pc = rhs.pc;
     sp = rhs.sp;
     fp = rhs.fp;
     state = rhs.state;
     DeleteArray(stack.Detach());
     stack = rhs.stack;
     return *this;
   }
 
   inline void InitStack(int depth) {
-    stack = SmartPointer<Address>(NewArray<Address>(depth + 1));
-    // null-terminate
-    stack[depth] = 0;
+    if (depth) {
+      stack = SmartPointer<Address>(NewArray<Address>(depth + 1));
+      // null-terminate
+      stack[depth] = 0;
+    }
   }
 };
 
 class Sampler {
  public:
   // Initialize sampler.
   explicit Sampler(int interval, bool profiling);
   virtual ~Sampler();
 
   // This method is called for each sampling period with the current
@@ skipping 17 matching lines @@
   bool active_;
   PlatformData* data_;  // Platform specific data.
   DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler);
 };
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal
 
 #endif  // V8_PLATFORM_H_