123 Bytecodes::Code opcode = bcs.raw_next();
124 switch (opcode) {
125 case Bytecodes::_return: *bcs.bcp() = Bytecodes::_return_register_finalizer; break;
126
127 case Bytecodes::_istore:
128 case Bytecodes::_lstore:
129 case Bytecodes::_fstore:
130 case Bytecodes::_dstore:
131 case Bytecodes::_astore:
132 if (bcs.get_index() != 0) continue;
133
134 // fall through
135 case Bytecodes::_istore_0:
136 case Bytecodes::_lstore_0:
137 case Bytecodes::_fstore_0:
138 case Bytecodes::_dstore_0:
139 case Bytecodes::_astore_0:
140 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
141 "can't overwrite local 0 in Object.<init>");
142 break;
143 }
144 }
145 }
146
147
148 // Rewrite a classfile-order CP index into a native-order CPC index.
149 void Rewriter::rewrite_member_reference(address bcp, int offset, bool reverse) {
150 address p = bcp + offset;
151 if (!reverse) {
152 int cp_index = Bytes::get_Java_u2(p);
153 int cache_index = cp_entry_to_cp_cache(cp_index);
154 Bytes::put_native_u2(p, cache_index);
155 if (!_method_handle_invokers.is_empty())
156 maybe_rewrite_invokehandle(p - 1, cp_index, cache_index, reverse);
157 } else {
158 int cache_index = Bytes::get_native_u2(p);
159 int pool_index = cp_cache_entry_pool_index(cache_index);
160 Bytes::put_Java_u2(p, pool_index);
161 if (!_method_handle_invokers.is_empty())
162 maybe_rewrite_invokehandle(p - 1, pool_index, cache_index, reverse);
450 case Bytecodes::_invokestatic :
451 case Bytecodes::_invokeinterface:
452 case Bytecodes::_invokehandle : // if reverse=true
453 rewrite_member_reference(bcp, prefix_length+1, reverse);
454 break;
455 case Bytecodes::_invokedynamic:
456 rewrite_invokedynamic(bcp, prefix_length+1, reverse);
457 break;
458 case Bytecodes::_ldc:
459 case Bytecodes::_fast_aldc: // if reverse=true
460 maybe_rewrite_ldc(bcp, prefix_length+1, false, reverse);
461 break;
462 case Bytecodes::_ldc_w:
463 case Bytecodes::_fast_aldc_w: // if reverse=true
464 maybe_rewrite_ldc(bcp, prefix_length+1, true, reverse);
465 break;
466 case Bytecodes::_jsr : // fall through
467 case Bytecodes::_jsr_w : nof_jsrs++; break;
468 case Bytecodes::_monitorenter : // fall through
469 case Bytecodes::_monitorexit : has_monitor_bytecodes = true; break;
470 }
471 }
472 }
473
474 // Update access flags
475 if (has_monitor_bytecodes) {
476 method->set_has_monitor_bytecodes();
477 }
478
479 // The present of a jsr bytecode implies that the method might potentially
480 // have to be rewritten, so we run the oopMapGenerator on the method
481 if (nof_jsrs > 0) {
482 method->set_has_jsrs();
483 // Second pass will revisit this method.
484 assert(method->has_jsrs(), "didn't we just set this?");
485 }
486 }
487
488 // After constant pool is created, revisit methods containing jsrs.
489 methodHandle Rewriter::rewrite_jsrs(methodHandle method, TRAPS) {
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123 Bytecodes::Code opcode = bcs.raw_next();
124 switch (opcode) {
125 case Bytecodes::_return: *bcs.bcp() = Bytecodes::_return_register_finalizer; break;
126
127 case Bytecodes::_istore:
128 case Bytecodes::_lstore:
129 case Bytecodes::_fstore:
130 case Bytecodes::_dstore:
131 case Bytecodes::_astore:
132 if (bcs.get_index() != 0) continue;
133
134 // fall through
135 case Bytecodes::_istore_0:
136 case Bytecodes::_lstore_0:
137 case Bytecodes::_fstore_0:
138 case Bytecodes::_dstore_0:
139 case Bytecodes::_astore_0:
140 THROW_MSG(vmSymbols::java_lang_IncompatibleClassChangeError(),
141 "can't overwrite local 0 in Object.<init>");
142 break;
143
144 default:
145 break;
146 }
147 }
148 }
149
150
151 // Rewrite a classfile-order CP index into a native-order CPC index.
152 void Rewriter::rewrite_member_reference(address bcp, int offset, bool reverse) {
153 address p = bcp + offset;
154 if (!reverse) {
155 int cp_index = Bytes::get_Java_u2(p);
156 int cache_index = cp_entry_to_cp_cache(cp_index);
157 Bytes::put_native_u2(p, cache_index);
158 if (!_method_handle_invokers.is_empty())
159 maybe_rewrite_invokehandle(p - 1, cp_index, cache_index, reverse);
160 } else {
161 int cache_index = Bytes::get_native_u2(p);
162 int pool_index = cp_cache_entry_pool_index(cache_index);
163 Bytes::put_Java_u2(p, pool_index);
164 if (!_method_handle_invokers.is_empty())
165 maybe_rewrite_invokehandle(p - 1, pool_index, cache_index, reverse);
453 case Bytecodes::_invokestatic :
454 case Bytecodes::_invokeinterface:
455 case Bytecodes::_invokehandle : // if reverse=true
456 rewrite_member_reference(bcp, prefix_length+1, reverse);
457 break;
458 case Bytecodes::_invokedynamic:
459 rewrite_invokedynamic(bcp, prefix_length+1, reverse);
460 break;
461 case Bytecodes::_ldc:
462 case Bytecodes::_fast_aldc: // if reverse=true
463 maybe_rewrite_ldc(bcp, prefix_length+1, false, reverse);
464 break;
465 case Bytecodes::_ldc_w:
466 case Bytecodes::_fast_aldc_w: // if reverse=true
467 maybe_rewrite_ldc(bcp, prefix_length+1, true, reverse);
468 break;
469 case Bytecodes::_jsr : // fall through
470 case Bytecodes::_jsr_w : nof_jsrs++; break;
471 case Bytecodes::_monitorenter : // fall through
472 case Bytecodes::_monitorexit : has_monitor_bytecodes = true; break;
473
474 default: break;
475 }
476 }
477 }
478
479 // Update access flags
480 if (has_monitor_bytecodes) {
481 method->set_has_monitor_bytecodes();
482 }
483
484 // The present of a jsr bytecode implies that the method might potentially
485 // have to be rewritten, so we run the oopMapGenerator on the method
486 if (nof_jsrs > 0) {
487 method->set_has_jsrs();
488 // Second pass will revisit this method.
489 assert(method->has_jsrs(), "didn't we just set this?");
490 }
491 }
492
493 // After constant pool is created, revisit methods containing jsrs.
494 methodHandle Rewriter::rewrite_jsrs(methodHandle method, TRAPS) {
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