1430 // MergeCPCleaner clears out merge_cp_oop
1431 constantPoolHandle merge_cp(THREAD, merge_cp_oop);
1432
1433 // Get constants() from the old class because it could have been rewritten
1434 // while we were at a safepoint allocating a new constant pool.
1435 constantPoolHandle old_cp(THREAD, the_class->constants());
1436 constantPoolHandle scratch_cp(THREAD, scratch_class->constants());
1437
1438 // If the length changed, the class was redefined out from under us. Return
1439 // an error.
1440 if (merge_cp_length != the_class->constants()->length()
1441 + scratch_class->constants()->length()) {
1442 return JVMTI_ERROR_INTERNAL;
1443 }
1444
1445 // Update the version number of the constant pool
1446 merge_cp->increment_and_save_version(old_cp->version());
1447
1448 ResourceMark rm(THREAD);
1449 _index_map_count = 0;
1450 _index_map_p = new intArray(scratch_cp->length(), -1);
1451
1452 _operands_cur_length = ConstantPool::operand_array_length(old_cp->operands());
1453 _operands_index_map_count = 0;
1454 _operands_index_map_p = new intArray(
1455 ConstantPool::operand_array_length(scratch_cp->operands()), -1);
1456
1457 // reference to the cp holder is needed for copy_operands()
1458 merge_cp->set_pool_holder(scratch_class());
1459 bool result = merge_constant_pools(old_cp, scratch_cp, &merge_cp,
1460 &merge_cp_length, THREAD);
1461 merge_cp->set_pool_holder(NULL);
1462
1463 if (!result) {
1464 // The merge can fail due to memory allocation failure or due
1465 // to robustness checks.
1466 return JVMTI_ERROR_INTERNAL;
1467 }
1468
1469 RC_TRACE_WITH_THREAD(0x00010000, THREAD,
1470 ("merge_cp_len=%d, index_map_len=%d", merge_cp_length, _index_map_count));
1471
1472 if (_index_map_count == 0) {
1473 // there is nothing to map between the new and merged constant pools
1474
1475 if (old_cp->length() == scratch_cp->length()) {
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1430 // MergeCPCleaner clears out merge_cp_oop
1431 constantPoolHandle merge_cp(THREAD, merge_cp_oop);
1432
1433 // Get constants() from the old class because it could have been rewritten
1434 // while we were at a safepoint allocating a new constant pool.
1435 constantPoolHandle old_cp(THREAD, the_class->constants());
1436 constantPoolHandle scratch_cp(THREAD, scratch_class->constants());
1437
1438 // If the length changed, the class was redefined out from under us. Return
1439 // an error.
1440 if (merge_cp_length != the_class->constants()->length()
1441 + scratch_class->constants()->length()) {
1442 return JVMTI_ERROR_INTERNAL;
1443 }
1444
1445 // Update the version number of the constant pool
1446 merge_cp->increment_and_save_version(old_cp->version());
1447
1448 ResourceMark rm(THREAD);
1449 _index_map_count = 0;
1450 _index_map_p = new intArray(scratch_cp->length(), scratch_cp->length(), -1);
1451
1452 _operands_cur_length = ConstantPool::operand_array_length(old_cp->operands());
1453 _operands_index_map_count = 0;
1454 int operands_index_map_len = ConstantPool::operand_array_length(scratch_cp->operands());
1455 _operands_index_map_p = new intArray(operands_index_map_len, operands_index_map_len, -1);
1456
1457 // reference to the cp holder is needed for copy_operands()
1458 merge_cp->set_pool_holder(scratch_class());
1459 bool result = merge_constant_pools(old_cp, scratch_cp, &merge_cp,
1460 &merge_cp_length, THREAD);
1461 merge_cp->set_pool_holder(NULL);
1462
1463 if (!result) {
1464 // The merge can fail due to memory allocation failure or due
1465 // to robustness checks.
1466 return JVMTI_ERROR_INTERNAL;
1467 }
1468
1469 RC_TRACE_WITH_THREAD(0x00010000, THREAD,
1470 ("merge_cp_len=%d, index_map_len=%d", merge_cp_length, _index_map_count));
1471
1472 if (_index_map_count == 0) {
1473 // there is nothing to map between the new and merged constant pools
1474
1475 if (old_cp->length() == scratch_cp->length()) {
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