Merge bleeding edge up to 8774 into the GC branch.

src/platform.h

 // Copyright 2011 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 159 matching lines @@
 
   // Returns the daylight savings offset for the given time.
   static double DaylightSavingsOffset(double time);
 
   // Returns last OS error.
   static int GetLastError();
 
   static FILE* FOpen(const char* path, const char* mode);
   static bool Remove(const char* path);
 
+  // Opens a temporary file, the file is auto removed on close.
+  static FILE* OpenTemporaryFile();
+
   // Log file open mode is platform-dependent due to line ends issues.
   static const char* const LogFileOpenMode;
 
   // Print output to console. This is mostly used for debugging output.
   // On platforms that has standard terminal output, the output
   // should go to stdout.
   static void Print(const char* format, ...);
   static void VPrint(const char* format, va_list args);
 
   // Print output to a file. This is mostly used for debugging output.
   static void FPrint(FILE* out, const char* format, ...);
   static void VFPrint(FILE* out, const char* format, va_list args);
 
   // Print error output to console. This is mostly used for error message
   // output. On platforms that has standard terminal output, the output
   // should go to stderr.
   static void PrintError(const char* format, ...);
   static void VPrintError(const char* format, va_list args);
 
   // Allocate/Free memory used by JS heap. Pages are readable/writable, but
   // they are not guaranteed to be executable unless 'executable' is true.
   // Returns the address of allocated memory, or NULL if failed.
   static void* Allocate(const size_t requested,
                         size_t* allocated,
                         bool is_executable);
   static void Free(void* address, const size_t size);
+
+  // Assign memory as a guard page so that access will cause an exception.
+  static void Guard(void* address, const size_t size);
+
   // Get the Alignment guaranteed by Allocate().
   static size_t AllocateAlignment();
 
-#ifdef ENABLE_HEAP_PROTECTION
-  // Protect/unprotect a block of memory by marking it read-only/writable.
-  static void Protect(void* address, size_t size);
-  static void Unprotect(void* address, size_t size, bool is_executable);
-#endif
-
   // Returns an indication of whether a pointer is in a space that
   // has been allocated by Allocate().  This method may conservatively
   // always return false, but giving more accurate information may
   // improve the robustness of the stack dump code in the presence of
   // heap corruption.
   static bool IsOutsideAllocatedSpace(void* pointer);
 
   // Sleep for a number of milliseconds.
   static void Sleep(const int milliseconds);
 
@@ skipping 380 matching lines @@
   union {
     Address tos;   // Top stack value (*sp).
     Address external_callback;
   };
   static const int kMaxFramesCount = 64;
   Address stack[kMaxFramesCount];  // Call stack.
   int frames_count : 8;  // Number of captured frames.
   bool has_external_callback : 1;
 };
 
-#ifdef ENABLE_LOGGING_AND_PROFILING
 class Sampler {
  public:
   // Initialize sampler.
   Sampler(Isolate* isolate, int interval);
   virtual ~Sampler();
 
   int interval() const { return interval_; }
 
   // Performs stack sampling.
   void SampleStack(TickSample* sample) {
@@ skipping 38 matching lines @@
   Isolate* isolate_;
   const int interval_;
   Atomic32 profiling_;
   Atomic32 active_;
   PlatformData* data_;  // Platform specific data.
   int samples_taken_;  // Counts stack samples taken.
   DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler);
 };
 
 
-#endif  // ENABLE_LOGGING_AND_PROFILING
-
 } }  // namespace v8::internal
 
 #endif  // V8_PLATFORM_H_