378   // if the last instruction is a call (typically to do a throw which
 379   // is coming at the end after block reordering) the return address
 380   // must still point into the code area in order to avoid assertion
 381   // failures when searching for the corresponding bci => add a nop
 382   // (was bug 5/14/1999 - gri)
 383   __ nop();
 384 
 385   // generate code for exception handler
 386   ciMethod* method = compilation()->method();
 387 
 388   address handler_base = __ start_a_stub(exception_handler_size);
 389 
 390   if (handler_base == NULL) {
 391     // not enough space left for the handler
 392     bailout("exception handler overflow");
 393     return -1;
 394   }
 395 
 396   int offset = code_offset();
 397 
 398   __ call(Runtime1::entry_for(Runtime1::handle_exception_id), relocInfo::runtime_call_type);
 399   __ delayed()->nop();
 400   debug_only(__ stop("should have gone to the caller");)
 401   assert(code_offset() - offset <= exception_handler_size, "overflow");
 402   __ end_a_stub();
 403 
 404   return offset;
 405 }
 406 
 407 
 408 // Emit the code to remove the frame from the stack in the exception
 409 // unwind path.
 410 int LIR_Assembler::emit_unwind_handler() {
 411 #ifndef PRODUCT
 412   if (CommentedAssembly) {
 413     _masm->block_comment("Unwind handler");
 414   }
 415 #endif
 416 
 417   int offset = code_offset();
 418 
 419   // Fetch the exception from TLS and clear out exception related thread state
 420   __ ld_ptr(G2_thread, in_bytes(JavaThread::exception_oop_offset()), O0);

 378   // if the last instruction is a call (typically to do a throw which
 379   // is coming at the end after block reordering) the return address
 380   // must still point into the code area in order to avoid assertion
 381   // failures when searching for the corresponding bci => add a nop
 382   // (was bug 5/14/1999 - gri)
 383   __ nop();
 384 
 385   // generate code for exception handler
 386   ciMethod* method = compilation()->method();
 387 
 388   address handler_base = __ start_a_stub(exception_handler_size);
 389 
 390   if (handler_base == NULL) {
 391     // not enough space left for the handler
 392     bailout("exception handler overflow");
 393     return -1;
 394   }
 395 
 396   int offset = code_offset();
 397 
 398   __ call(Runtime1::entry_for(Runtime1::handle_exception_from_callee_id), relocInfo::runtime_call_type);
 399   __ delayed()->nop();
 400   __ should_not_reach_here();
 401   assert(code_offset() - offset <= exception_handler_size, "overflow");
 402   __ end_a_stub();
 403 
 404   return offset;
 405 }
 406 
 407 
 408 // Emit the code to remove the frame from the stack in the exception
 409 // unwind path.
 410 int LIR_Assembler::emit_unwind_handler() {
 411 #ifndef PRODUCT
 412   if (CommentedAssembly) {
 413     _masm->block_comment("Unwind handler");
 414   }
 415 #endif
 416 
 417   int offset = code_offset();
 418 
 419   // Fetch the exception from TLS and clear out exception related thread state
 420   __ ld_ptr(G2_thread, in_bytes(JavaThread::exception_oop_offset()), O0);