Make assertion scopes thread safe.

src/disassembler.cc

 // 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 97 matching lines @@
 
 
 static const int kOutBufferSize = 2048 + String::kMaxShortPrintLength;
 static const int kRelocInfoPosition = 57;
 
 static int DecodeIt(Isolate* isolate,
                     FILE* f,
                     const V8NameConverter& converter,
                     byte* begin,
                     byte* end) {
-  NoHandleAllocation ha(isolate);
-  AssertNoAllocation no_alloc;
+  SealHandleScope shs(isolate);
+  DisallowHeapAllocation no_alloc;
   ExternalReferenceEncoder ref_encoder;
   Heap* heap = HEAP;
 
   v8::internal::EmbeddedVector<char, 128> decode_buffer;
   v8::internal::EmbeddedVector<char, kOutBufferSize> out_buffer;
   StringBuilder out(out_buffer.start(), out_buffer.length());
   byte* pc = begin;
   disasm::Disassembler d(converter);
   RelocIterator* it = NULL;
   if (converter.code() != NULL) {
@@ skipping 228 matching lines @@
 
 void Disassembler::Dump(FILE* f, byte* begin, byte* end) {}
 int Disassembler::Decode(Isolate* isolate, FILE* f, byte* begin, byte* end) {
   return 0;
 }
 void Disassembler::Decode(FILE* f, Code* code) {}
 
 #endif  // ENABLE_DISASSEMBLER
 
 } }  // namespace v8::internal