Add a write buffer, aligned so that a single bit tells us whether it has...

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 29 matching lines @@
 #include "ic-inl.h"
 #include "factory.h"
 #include "runtime.h"
 #include "runtime-profiler.h"
 #include "serialize.h"
 #include "stub-cache.h"
 #include "regexp-stack.h"
 #include "ast.h"
 #include "regexp-macro-assembler.h"
 #include "platform.h"
+#include "write-buffer.h"
 // Include native regexp-macro-assembler.
 #ifndef V8_INTERPRETED_REGEXP
 #if V8_TARGET_ARCH_IA32
 #include "ia32/regexp-macro-assembler-ia32.h"
 #elif V8_TARGET_ARCH_X64
 #include "x64/regexp-macro-assembler-x64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "arm/regexp-macro-assembler-arm.h"
 #else  // Unknown architecture.
 #error "Unknown architecture."
@@ skipping 604 matching lines @@
 ExternalReference ExternalReference::address_of_regexp_stack_limit() {
   return ExternalReference(RegExpStack::limit_address());
 }
 
 
 ExternalReference ExternalReference::new_space_start() {
   return ExternalReference(Heap::NewSpaceStart());
 }
 
 
+ExternalReference ExternalReference::write_buffer_top() {
+  return ExternalReference(WriteBuffer::Top());
+}
+
+
 ExternalReference ExternalReference::new_space_mask() {
   return ExternalReference(reinterpret_cast<Address>(Heap::NewSpaceMask()));
 }
 
 
 ExternalReference ExternalReference::new_space_allocation_top_address() {
   return ExternalReference(Heap::NewSpaceAllocationTopAddress());
 }
 
 
@@ skipping 251 matching lines @@
     assembler_->RecordRelocInfo(RelocInfo::POSITION, state_.current_position);
     state_.written_position = state_.current_position;
     written = true;
   }
 
   // Return whether something was written.
   return written;
 }
 
 } }  // namespace v8::internal