291   return &dcon->value;
 292 }
 293 void AbstractAssembler::update_delayed_values() {
 294   DelayedConstant::update_all();
 295 }
 296 
 297 void AbstractAssembler::block_comment(const char* comment) {
 298   if (sect() == CodeBuffer::SECT_INSTS) {
 299     code_section()->outer()->block_comment(offset(), comment);
 300   }
 301 }
 302 
 303 const char* AbstractAssembler::code_string(const char* str) {
 304   if (sect() == CodeBuffer::SECT_INSTS || sect() == CodeBuffer::SECT_STUBS) {
 305     return code_section()->outer()->code_string(str);
 306   }
 307   return NULL;
 308 }
 309 
 310 bool MacroAssembler::needs_explicit_null_check(intptr_t offset) {
 311   // Exception handler checks the nmethod's implicit null checks table
 312   // only when this method returns false.
 313 #ifdef _LP64
 314   if (UseCompressedOops && Universe::narrow_oop_base() != NULL) {
 315     assert (Universe::heap() != NULL, "java heap should be initialized");
 316     // The first page after heap_base is unmapped and
 317     // the 'offset' is equal to [heap_base + offset] for
 318     // narrow oop implicit null checks.
 319     uintptr_t base = (uintptr_t)Universe::narrow_oop_base();
 320     if ((uintptr_t)offset >= base) {
 321       // Normalize offset for the next check.
 322       offset = (intptr_t)(pointer_delta((void*)offset, (void*)base, 1));
 323     }
 324   }
 325 #endif
 326   return offset < 0 || os::vm_page_size() <= offset;
 327 }

 291   return &dcon->value;
 292 }
 293 void AbstractAssembler::update_delayed_values() {
 294   DelayedConstant::update_all();
 295 }
 296 
 297 void AbstractAssembler::block_comment(const char* comment) {
 298   if (sect() == CodeBuffer::SECT_INSTS) {
 299     code_section()->outer()->block_comment(offset(), comment);
 300   }
 301 }
 302 
 303 const char* AbstractAssembler::code_string(const char* str) {
 304   if (sect() == CodeBuffer::SECT_INSTS || sect() == CodeBuffer::SECT_STUBS) {
 305     return code_section()->outer()->code_string(str);
 306   }
 307   return NULL;
 308 }
 309 
 310 bool MacroAssembler::needs_explicit_null_check(intptr_t offset) {
 311   return BarrierSet::barrier_set()->barrier_set_assembler()->needs_explicit_null_check(offset);















 312 }