aoqi@0: /*
dlong@7598:  * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@1: /*
aoqi@1:  * This file has been modified by Loongson Technology in 2015. These
aoqi@1:  * modifications are Copyright (c) 2015 Loongson Technology, and are made
aoqi@1:  * available on the same license terms set forth above.
aoqi@1:  */
aoqi@1: 
aoqi@0: #include "precompiled.hpp"
aoqi@0: #include "asm/codeBuffer.hpp"
aoqi@0: #include "c1/c1_CodeStubs.hpp"
aoqi@0: #include "c1/c1_Defs.hpp"
aoqi@0: #include "c1/c1_FrameMap.hpp"
aoqi@0: #include "c1/c1_LIRAssembler.hpp"
aoqi@0: #include "c1/c1_MacroAssembler.hpp"
aoqi@0: #include "c1/c1_Runtime1.hpp"
aoqi@0: #include "classfile/systemDictionary.hpp"
aoqi@0: #include "classfile/vmSymbols.hpp"
aoqi@0: #include "code/codeBlob.hpp"
aoqi@0: #include "code/compiledIC.hpp"
aoqi@0: #include "code/pcDesc.hpp"
aoqi@0: #include "code/scopeDesc.hpp"
aoqi@0: #include "code/vtableStubs.hpp"
aoqi@0: #include "compiler/disassembler.hpp"
aoqi@0: #include "gc_interface/collectedHeap.hpp"
aoqi@0: #include "interpreter/bytecode.hpp"
aoqi@0: #include "interpreter/interpreter.hpp"
aoqi@0: #include "memory/allocation.inline.hpp"
aoqi@0: #include "memory/barrierSet.hpp"
aoqi@0: #include "memory/oopFactory.hpp"
aoqi@0: #include "memory/resourceArea.hpp"
aoqi@0: #include "oops/objArrayKlass.hpp"
aoqi@0: #include "oops/oop.inline.hpp"
aoqi@0: #include "runtime/biasedLocking.hpp"
aoqi@0: #include "runtime/compilationPolicy.hpp"
aoqi@0: #include "runtime/interfaceSupport.hpp"
aoqi@0: #include "runtime/javaCalls.hpp"
aoqi@0: #include "runtime/sharedRuntime.hpp"
aoqi@0: #include "runtime/threadCritical.hpp"
aoqi@0: #include "runtime/vframe.hpp"
aoqi@0: #include "runtime/vframeArray.hpp"
aoqi@0: #include "utilities/copy.hpp"
aoqi@0: #include "utilities/events.hpp"
aoqi@0: 
aoqi@0: 
aoqi@0: // Implementation of StubAssembler
aoqi@0: 
aoqi@0: StubAssembler::StubAssembler(CodeBuffer* code, const char * name, int stub_id) : C1_MacroAssembler(code) {
aoqi@0:   _name = name;
aoqi@0:   _must_gc_arguments = false;
aoqi@0:   _frame_size = no_frame_size;
aoqi@0:   _num_rt_args = 0;
aoqi@0:   _stub_id = stub_id;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void StubAssembler::set_info(const char* name, bool must_gc_arguments) {
aoqi@0:   _name = name;
aoqi@0:   _must_gc_arguments = must_gc_arguments;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void StubAssembler::set_frame_size(int size) {
aoqi@0:   if (_frame_size == no_frame_size) {
aoqi@0:     _frame_size = size;
aoqi@0:   }
aoqi@0:   assert(_frame_size == size, "can't change the frame size");
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void StubAssembler::set_num_rt_args(int args) {
aoqi@0:   if (_num_rt_args == 0) {
aoqi@0:     _num_rt_args = args;
aoqi@0:   }
aoqi@0:   assert(_num_rt_args == args, "can't change the number of args");
aoqi@0: }
aoqi@0: 
aoqi@0: // Implementation of Runtime1
aoqi@0: 
aoqi@0: CodeBlob* Runtime1::_blobs[Runtime1::number_of_ids];
aoqi@0: const char *Runtime1::_blob_names[] = {
aoqi@0:   RUNTIME1_STUBS(STUB_NAME, LAST_STUB_NAME)
aoqi@0: };
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0: // statistics
aoqi@0: int Runtime1::_generic_arraycopy_cnt = 0;
aoqi@0: int Runtime1::_primitive_arraycopy_cnt = 0;
aoqi@0: int Runtime1::_oop_arraycopy_cnt = 0;
aoqi@0: int Runtime1::_generic_arraycopystub_cnt = 0;
aoqi@0: int Runtime1::_arraycopy_slowcase_cnt = 0;
aoqi@0: int Runtime1::_arraycopy_checkcast_cnt = 0;
aoqi@0: int Runtime1::_arraycopy_checkcast_attempt_cnt = 0;
aoqi@0: int Runtime1::_new_type_array_slowcase_cnt = 0;
aoqi@0: int Runtime1::_new_object_array_slowcase_cnt = 0;
aoqi@0: int Runtime1::_new_instance_slowcase_cnt = 0;
aoqi@0: int Runtime1::_new_multi_array_slowcase_cnt = 0;
aoqi@0: int Runtime1::_monitorenter_slowcase_cnt = 0;
aoqi@0: int Runtime1::_monitorexit_slowcase_cnt = 0;
aoqi@0: int Runtime1::_patch_code_slowcase_cnt = 0;
aoqi@0: int Runtime1::_throw_range_check_exception_count = 0;
aoqi@0: int Runtime1::_throw_index_exception_count = 0;
aoqi@0: int Runtime1::_throw_div0_exception_count = 0;
aoqi@0: int Runtime1::_throw_null_pointer_exception_count = 0;
aoqi@0: int Runtime1::_throw_class_cast_exception_count = 0;
aoqi@0: int Runtime1::_throw_incompatible_class_change_error_count = 0;
aoqi@0: int Runtime1::_throw_array_store_exception_count = 0;
aoqi@0: int Runtime1::_throw_count = 0;
aoqi@0: 
aoqi@0: static int _byte_arraycopy_cnt = 0;
aoqi@0: static int _short_arraycopy_cnt = 0;
aoqi@0: static int _int_arraycopy_cnt = 0;
aoqi@0: static int _long_arraycopy_cnt = 0;
aoqi@0: static int _oop_arraycopy_cnt = 0;
aoqi@0: 
aoqi@0: address Runtime1::arraycopy_count_address(BasicType type) {
aoqi@0:   switch (type) {
aoqi@0:   case T_BOOLEAN:
aoqi@0:   case T_BYTE:   return (address)&_byte_arraycopy_cnt;
aoqi@0:   case T_CHAR:
aoqi@0:   case T_SHORT:  return (address)&_short_arraycopy_cnt;
aoqi@0:   case T_FLOAT:
aoqi@0:   case T_INT:    return (address)&_int_arraycopy_cnt;
aoqi@0:   case T_DOUBLE:
aoqi@0:   case T_LONG:   return (address)&_long_arraycopy_cnt;
aoqi@0:   case T_ARRAY:
aoqi@0:   case T_OBJECT: return (address)&_oop_arraycopy_cnt;
aoqi@0:   default:
aoqi@0:     ShouldNotReachHere();
aoqi@0:     return NULL;
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: #endif
aoqi@0: 
aoqi@0: // Simple helper to see if the caller of a runtime stub which
aoqi@0: // entered the VM has been deoptimized
aoqi@0: 
aoqi@0: static bool caller_is_deopted() {
aoqi@0:   JavaThread* thread = JavaThread::current();
aoqi@0:   RegisterMap reg_map(thread, false);
aoqi@0:   frame runtime_frame = thread->last_frame();
aoqi@0:   frame caller_frame = runtime_frame.sender(&reg_map);
aoqi@0:   assert(caller_frame.is_compiled_frame(), "must be compiled");
aoqi@0:   return caller_frame.is_deoptimized_frame();
aoqi@0: }
aoqi@0: 
aoqi@0: // Stress deoptimization
aoqi@0: static void deopt_caller() {
aoqi@0:   if ( !caller_is_deopted()) {
aoqi@0:     JavaThread* thread = JavaThread::current();
aoqi@0:     RegisterMap reg_map(thread, false);
aoqi@0:     frame runtime_frame = thread->last_frame();
aoqi@0:     frame caller_frame = runtime_frame.sender(&reg_map);
aoqi@0:     Deoptimization::deoptimize_frame(thread, caller_frame.id());
aoqi@0:     assert(caller_is_deopted(), "Must be deoptimized");
aoqi@0:   }
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void Runtime1::generate_blob_for(BufferBlob* buffer_blob, StubID id) {
aoqi@0:   assert(0 <= id && id < number_of_ids, "illegal stub id");
aoqi@0:   ResourceMark rm;
aoqi@0:   // create code buffer for code storage
aoqi@0:   CodeBuffer code(buffer_blob);
aoqi@0: 
aoqi@0:   Compilation::setup_code_buffer(&code, 0);
aoqi@0: 
aoqi@0:   // create assembler for code generation
aoqi@0:   StubAssembler* sasm = new StubAssembler(&code, name_for(id), id);
aoqi@0:   // generate code for runtime stub
aoqi@0:   OopMapSet* oop_maps;
aoqi@0:   oop_maps = generate_code_for(id, sasm);
aoqi@0:   assert(oop_maps == NULL || sasm->frame_size() != no_frame_size,
aoqi@0:          "if stub has an oop map it must have a valid frame size");
aoqi@0: 
aoqi@0: #ifdef ASSERT
aoqi@0:   // Make sure that stubs that need oopmaps have them
aoqi@0:   switch (id) {
aoqi@0:     // These stubs don't need to have an oopmap
aoqi@0:     case dtrace_object_alloc_id:
aoqi@0:     case g1_pre_barrier_slow_id:
aoqi@0:     case g1_post_barrier_slow_id:
aoqi@0:     case slow_subtype_check_id:
aoqi@0:     case fpu2long_stub_id:
aoqi@0:     case unwind_exception_id:
aoqi@0:     case counter_overflow_id:
aoqi@0: #if defined(SPARC) || defined(PPC)
aoqi@0:     case handle_exception_nofpu_id:  // Unused on sparc
aoqi@0: #endif
aoqi@0:       break;
aoqi@0: 
aoqi@0:     // All other stubs should have oopmaps
aoqi@0:     default:
aoqi@0:       assert(oop_maps != NULL, "must have an oopmap");
aoqi@0:   }
aoqi@0: #endif
aoqi@0: 
aoqi@0:   // align so printing shows nop's instead of random code at the end (SimpleStubs are aligned)
aoqi@0:   sasm->align(BytesPerWord);
aoqi@0:   // make sure all code is in code buffer
aoqi@0:   sasm->flush();
aoqi@0:   // create blob - distinguish a few special cases
aoqi@0:   CodeBlob* blob = RuntimeStub::new_runtime_stub(name_for(id),
aoqi@0:                                                  &code,
aoqi@0:                                                  CodeOffsets::frame_never_safe,
aoqi@0:                                                  sasm->frame_size(),
aoqi@0:                                                  oop_maps,
aoqi@0:                                                  sasm->must_gc_arguments());
aoqi@0:   // install blob
aoqi@0:   assert(blob != NULL, "blob must exist");
aoqi@0:   _blobs[id] = blob;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: void Runtime1::initialize(BufferBlob* blob) {
aoqi@0:   // platform-dependent initialization
aoqi@0:   initialize_pd();
aoqi@0:   // generate stubs
aoqi@0:   for (int id = 0; id < number_of_ids; id++) generate_blob_for(blob, (StubID)id);
aoqi@0:   // printing
aoqi@0: #ifndef PRODUCT
aoqi@0:   if (PrintSimpleStubs) {
aoqi@0:     ResourceMark rm;
aoqi@0:     for (int id = 0; id < number_of_ids; id++) {
aoqi@0:       _blobs[id]->print();
aoqi@0:       if (_blobs[id]->oop_maps() != NULL) {
aoqi@0:         _blobs[id]->oop_maps()->print();
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0: #endif
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: CodeBlob* Runtime1::blob_for(StubID id) {
aoqi@0:   assert(0 <= id && id < number_of_ids, "illegal stub id");
aoqi@0:   return _blobs[id];
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: const char* Runtime1::name_for(StubID id) {
aoqi@0:   assert(0 <= id && id < number_of_ids, "illegal stub id");
aoqi@0:   return _blob_names[id];
aoqi@0: }
aoqi@0: 
aoqi@0: const char* Runtime1::name_for_address(address entry) {
aoqi@0:   for (int id = 0; id < number_of_ids; id++) {
aoqi@0:     if (entry == entry_for((StubID)id)) return name_for((StubID)id);
aoqi@0:   }
aoqi@0: 
aoqi@0: #define FUNCTION_CASE(a, f) \
aoqi@0:   if ((intptr_t)a == CAST_FROM_FN_PTR(intptr_t, f))  return #f
aoqi@0: 
aoqi@0:   FUNCTION_CASE(entry, os::javaTimeMillis);
aoqi@0:   FUNCTION_CASE(entry, os::javaTimeNanos);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::OSR_migration_end);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::d2f);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::d2i);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::d2l);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::dcos);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::dexp);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::dlog);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::dlog10);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::dpow);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::drem);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::dsin);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::dtan);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::f2i);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::f2l);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::frem);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::l2d);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::l2f);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::ldiv);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::lmul);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::lrem);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::lrem);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::dtrace_method_entry);
aoqi@0:   FUNCTION_CASE(entry, SharedRuntime::dtrace_method_exit);
aoqi@0:   FUNCTION_CASE(entry, is_instance_of);
aoqi@0:   FUNCTION_CASE(entry, trace_block_entry);
aoqi@0: #ifdef TRACE_HAVE_INTRINSICS
aoqi@0:   FUNCTION_CASE(entry, TRACE_TIME_METHOD);
aoqi@0: #endif
aoqi@0:   FUNCTION_CASE(entry, StubRoutines::updateBytesCRC32());
aoqi@0: 
aoqi@0: #undef FUNCTION_CASE
aoqi@0: 
aoqi@0:   // Soft float adds more runtime names.
aoqi@0:   return pd_name_for_address(entry);
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::new_instance(JavaThread* thread, Klass* klass))
aoqi@0:   NOT_PRODUCT(_new_instance_slowcase_cnt++;)
aoqi@0: 
aoqi@0:   assert(klass->is_klass(), "not a class");
aoqi@0:   instanceKlassHandle h(thread, klass);
aoqi@0:   h->check_valid_for_instantiation(true, CHECK);
aoqi@0:   // make sure klass is initialized
aoqi@0:   h->initialize(CHECK);
aoqi@0:   // allocate instance and return via TLS
aoqi@0:   oop obj = h->allocate_instance(CHECK);
aoqi@0:   thread->set_vm_result(obj);
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::new_type_array(JavaThread* thread, Klass* klass, jint length))
aoqi@0:   NOT_PRODUCT(_new_type_array_slowcase_cnt++;)
aoqi@0:   // Note: no handle for klass needed since they are not used
aoqi@0:   //       anymore after new_typeArray() and no GC can happen before.
aoqi@0:   //       (This may have to change if this code changes!)
aoqi@0:   assert(klass->is_klass(), "not a class");
aoqi@0:   BasicType elt_type = TypeArrayKlass::cast(klass)->element_type();
aoqi@0:   oop obj = oopFactory::new_typeArray(elt_type, length, CHECK);
aoqi@0:   thread->set_vm_result(obj);
aoqi@0:   // This is pretty rare but this runtime patch is stressful to deoptimization
aoqi@0:   // if we deoptimize here so force a deopt to stress the path.
aoqi@0:   if (DeoptimizeALot) {
aoqi@0:     deopt_caller();
aoqi@0:   }
aoqi@0: 
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::new_object_array(JavaThread* thread, Klass* array_klass, jint length))
aoqi@0:   NOT_PRODUCT(_new_object_array_slowcase_cnt++;)
aoqi@0: 
aoqi@0:   // Note: no handle for klass needed since they are not used
aoqi@0:   //       anymore after new_objArray() and no GC can happen before.
aoqi@0:   //       (This may have to change if this code changes!)
aoqi@0:   assert(array_klass->is_klass(), "not a class");
aoqi@0:   Klass* elem_klass = ObjArrayKlass::cast(array_klass)->element_klass();
aoqi@0:   objArrayOop obj = oopFactory::new_objArray(elem_klass, length, CHECK);
aoqi@0:   thread->set_vm_result(obj);
aoqi@0:   // This is pretty rare but this runtime patch is stressful to deoptimization
aoqi@0:   // if we deoptimize here so force a deopt to stress the path.
aoqi@0:   if (DeoptimizeALot) {
aoqi@0:     deopt_caller();
aoqi@0:   }
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims))
aoqi@0:   NOT_PRODUCT(_new_multi_array_slowcase_cnt++;)
aoqi@0: 
aoqi@0:   assert(klass->is_klass(), "not a class");
aoqi@0:   assert(rank >= 1, "rank must be nonzero");
aoqi@0:   oop obj = ArrayKlass::cast(klass)->multi_allocate(rank, dims, CHECK);
aoqi@0:   thread->set_vm_result(obj);
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::unimplemented_entry(JavaThread* thread, StubID id))
aoqi@0:   tty->print_cr("Runtime1::entry_for(%d) returned unimplemented entry point", id);
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::throw_array_store_exception(JavaThread* thread, oopDesc* obj))
aoqi@0:   ResourceMark rm(thread);
aoqi@0:   const char* klass_name = obj->klass()->external_name();
aoqi@0:   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayStoreException(), klass_name);
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: // counter_overflow() is called from within C1-compiled methods. The enclosing method is the method
aoqi@0: // associated with the top activation record. The inlinee (that is possibly included in the enclosing
aoqi@0: // method) method oop is passed as an argument. In order to do that it is embedded in the code as
aoqi@0: // a constant.
aoqi@0: static nmethod* counter_overflow_helper(JavaThread* THREAD, int branch_bci, Method* m) {
aoqi@0:   nmethod* osr_nm = NULL;
aoqi@0:   methodHandle method(THREAD, m);
aoqi@0: 
aoqi@0:   RegisterMap map(THREAD, false);
aoqi@0:   frame fr =  THREAD->last_frame().sender(&map);
aoqi@0:   nmethod* nm = (nmethod*) fr.cb();
aoqi@0:   assert(nm!= NULL && nm->is_nmethod(), "Sanity check");
aoqi@0:   methodHandle enclosing_method(THREAD, nm->method());
aoqi@0: 
aoqi@0:   CompLevel level = (CompLevel)nm->comp_level();
aoqi@0:   int bci = InvocationEntryBci;
aoqi@0:   if (branch_bci != InvocationEntryBci) {
aoqi@0:     // Compute desination bci
aoqi@0:     address pc = method()->code_base() + branch_bci;
aoqi@0:     Bytecodes::Code branch = Bytecodes::code_at(method(), pc);
aoqi@0:     int offset = 0;
aoqi@0:     switch (branch) {
aoqi@0:       case Bytecodes::_if_icmplt: case Bytecodes::_iflt:
aoqi@0:       case Bytecodes::_if_icmpgt: case Bytecodes::_ifgt:
aoqi@0:       case Bytecodes::_if_icmple: case Bytecodes::_ifle:
aoqi@0:       case Bytecodes::_if_icmpge: case Bytecodes::_ifge:
aoqi@0:       case Bytecodes::_if_icmpeq: case Bytecodes::_if_acmpeq: case Bytecodes::_ifeq:
aoqi@0:       case Bytecodes::_if_icmpne: case Bytecodes::_if_acmpne: case Bytecodes::_ifne:
aoqi@0:       case Bytecodes::_ifnull: case Bytecodes::_ifnonnull: case Bytecodes::_goto:
aoqi@0:         offset = (int16_t)Bytes::get_Java_u2(pc + 1);
aoqi@0:         break;
aoqi@0:       case Bytecodes::_goto_w:
aoqi@0:         offset = Bytes::get_Java_u4(pc + 1);
aoqi@0:         break;
aoqi@0:       default: ;
aoqi@0:     }
aoqi@0:     bci = branch_bci + offset;
aoqi@0:   }
aoqi@0:   assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
aoqi@0:   osr_nm = CompilationPolicy::policy()->event(enclosing_method, method, branch_bci, bci, level, nm, THREAD);
aoqi@0:   assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
aoqi@0:   return osr_nm;
aoqi@0: }
aoqi@0: 
aoqi@0: JRT_BLOCK_ENTRY(address, Runtime1::counter_overflow(JavaThread* thread, int bci, Method* method))
aoqi@0:   nmethod* osr_nm;
aoqi@0:   JRT_BLOCK
aoqi@0:     osr_nm = counter_overflow_helper(thread, bci, method);
aoqi@0:     if (osr_nm != NULL) {
aoqi@0:       RegisterMap map(thread, false);
aoqi@0:       frame fr =  thread->last_frame().sender(&map);
aoqi@0:       Deoptimization::deoptimize_frame(thread, fr.id());
aoqi@0:     }
aoqi@0:   JRT_BLOCK_END
aoqi@0:   return NULL;
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: extern void vm_exit(int code);
aoqi@0: 
aoqi@0: // Enter this method from compiled code handler below. This is where we transition
aoqi@0: // to VM mode. This is done as a helper routine so that the method called directly
aoqi@0: // from compiled code does not have to transition to VM. This allows the entry
aoqi@0: // method to see if the nmethod that we have just looked up a handler for has
aoqi@0: // been deoptimized while we were in the vm. This simplifies the assembly code
aoqi@0: // cpu directories.
aoqi@0: //
aoqi@0: // We are entering here from exception stub (via the entry method below)
aoqi@0: // If there is a compiled exception handler in this method, we will continue there;
aoqi@0: // otherwise we will unwind the stack and continue at the caller of top frame method
aoqi@0: // Note: we enter in Java using a special JRT wrapper. This wrapper allows us to
aoqi@0: // control the area where we can allow a safepoint. After we exit the safepoint area we can
aoqi@0: // check to see if the handler we are going to return is now in a nmethod that has
aoqi@0: // been deoptimized. If that is the case we return the deopt blob
aoqi@0: // unpack_with_exception entry instead. This makes life for the exception blob easier
aoqi@0: // because making that same check and diverting is painful from assembly language.
aoqi@0: JRT_ENTRY_NO_ASYNC(static address, exception_handler_for_pc_helper(JavaThread* thread, oopDesc* ex, address pc, nmethod*& nm))
aoqi@0:   // Reset method handle flag.
aoqi@0:   thread->set_is_method_handle_return(false);
aoqi@0: 
aoqi@0:   Handle exception(thread, ex);
aoqi@0:   nm = CodeCache::find_nmethod(pc);
aoqi@0:   assert(nm != NULL, "this is not an nmethod");
aoqi@0:   // Adjust the pc as needed/
aoqi@0:   if (nm->is_deopt_pc(pc)) {
aoqi@0:     RegisterMap map(thread, false);
aoqi@0:     frame exception_frame = thread->last_frame().sender(&map);
aoqi@0:     // if the frame isn't deopted then pc must not correspond to the caller of last_frame
aoqi@0:     assert(exception_frame.is_deoptimized_frame(), "must be deopted");
aoqi@0:     pc = exception_frame.pc();
aoqi@0:   }
aoqi@0: #ifdef ASSERT
aoqi@0:   assert(exception.not_null(), "NULL exceptions should be handled by throw_exception");
aoqi@0:   assert(exception->is_oop(), "just checking");
aoqi@0:   // Check that exception is a subclass of Throwable, otherwise we have a VerifyError
aoqi@0:   if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
aoqi@0:     if (ExitVMOnVerifyError) vm_exit(-1);
aoqi@0:     ShouldNotReachHere();
aoqi@0:   }
aoqi@0: #endif
aoqi@0: 
aoqi@0:   // Check the stack guard pages and reenable them if necessary and there is
aoqi@0:   // enough space on the stack to do so.  Use fast exceptions only if the guard
aoqi@0:   // pages are enabled.
aoqi@0:   bool guard_pages_enabled = thread->stack_yellow_zone_enabled();
aoqi@0:   if (!guard_pages_enabled) guard_pages_enabled = thread->reguard_stack();
aoqi@0: 
aoqi@0:   if (JvmtiExport::can_post_on_exceptions()) {
aoqi@0:     // To ensure correct notification of exception catches and throws
aoqi@0:     // we have to deoptimize here.  If we attempted to notify the
aoqi@0:     // catches and throws during this exception lookup it's possible
aoqi@0:     // we could deoptimize on the way out of the VM and end back in
aoqi@0:     // the interpreter at the throw site.  This would result in double
aoqi@0:     // notifications since the interpreter would also notify about
aoqi@0:     // these same catches and throws as it unwound the frame.
aoqi@0: 
aoqi@0:     RegisterMap reg_map(thread);
aoqi@0:     frame stub_frame = thread->last_frame();
aoqi@0:     frame caller_frame = stub_frame.sender(&reg_map);
aoqi@0: 
aoqi@0:     // We don't really want to deoptimize the nmethod itself since we
aoqi@0:     // can actually continue in the exception handler ourselves but I
aoqi@0:     // don't see an easy way to have the desired effect.
aoqi@0:     Deoptimization::deoptimize_frame(thread, caller_frame.id());
aoqi@0:     assert(caller_is_deopted(), "Must be deoptimized");
aoqi@0: 
aoqi@0:     return SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
aoqi@0:   }
aoqi@0: 
aoqi@0:   // ExceptionCache is used only for exceptions at call sites and not for implicit exceptions
aoqi@0:   if (guard_pages_enabled) {
aoqi@0:     address fast_continuation = nm->handler_for_exception_and_pc(exception, pc);
aoqi@0:     if (fast_continuation != NULL) {
aoqi@0:       // Set flag if return address is a method handle call site.
aoqi@0:       thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
aoqi@0:       return fast_continuation;
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   // If the stack guard pages are enabled, check whether there is a handler in
aoqi@0:   // the current method.  Otherwise (guard pages disabled), force an unwind and
aoqi@0:   // skip the exception cache update (i.e., just leave continuation==NULL).
aoqi@0:   address continuation = NULL;
aoqi@0:   if (guard_pages_enabled) {
aoqi@0: 
aoqi@0:     // New exception handling mechanism can support inlined methods
aoqi@0:     // with exception handlers since the mappings are from PC to PC
aoqi@0: 
aoqi@0:     // debugging support
aoqi@0:     // tracing
aoqi@0:     if (TraceExceptions) {
aoqi@0:       ttyLocker ttyl;
aoqi@0:       ResourceMark rm;
aoqi@0:       tty->print_cr("Exception <%s> (" INTPTR_FORMAT ") thrown in compiled method <%s> at PC " INTPTR_FORMAT " for thread " INTPTR_FORMAT "",
aoqi@0:                     exception->print_value_string(), p2i((address)exception()), nm->method()->print_value_string(), p2i(pc), p2i(thread));
aoqi@0:     }
aoqi@0:     // for AbortVMOnException flag
aoqi@0:     NOT_PRODUCT(Exceptions::debug_check_abort(exception));
aoqi@0: 
aoqi@0:     // Clear out the exception oop and pc since looking up an
aoqi@0:     // exception handler can cause class loading, which might throw an
aoqi@0:     // exception and those fields are expected to be clear during
aoqi@0:     // normal bytecode execution.
aoqi@0:     thread->clear_exception_oop_and_pc();
aoqi@0: 
roland@7167:     Handle original_exception(thread, exception());
roland@7167: 
aoqi@0:     continuation = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, false, false);
aoqi@0:     // If an exception was thrown during exception dispatch, the exception oop may have changed
aoqi@0:     thread->set_exception_oop(exception());
aoqi@0:     thread->set_exception_pc(pc);
aoqi@0: 
aoqi@0:     // the exception cache is used only by non-implicit exceptions
roland@7167:     // Update the exception cache only when there didn't happen
roland@7167:     // another exception during the computation of the compiled
roland@7167:     // exception handler.
roland@7167:     if (continuation != NULL && original_exception() == exception()) {
aoqi@0:       nm->add_handler_for_exception_and_pc(exception, pc, continuation);
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   thread->set_vm_result(exception());
aoqi@0:   // Set flag if return address is a method handle call site.
aoqi@0:   thread->set_is_method_handle_return(nm->is_method_handle_return(pc));
aoqi@0: 
aoqi@0:   if (TraceExceptions) {
aoqi@0:     ttyLocker ttyl;
aoqi@0:     ResourceMark rm;
aoqi@0:     tty->print_cr("Thread " PTR_FORMAT " continuing at PC " PTR_FORMAT " for exception thrown at PC " PTR_FORMAT,
aoqi@0:                   p2i(thread), p2i(continuation), p2i(pc));
aoqi@0:   }
aoqi@0: 
aoqi@0:   return continuation;
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: // Enter this method from compiled code only if there is a Java exception handler
aoqi@0: // in the method handling the exception.
aoqi@0: // We are entering here from exception stub. We don't do a normal VM transition here.
aoqi@0: // We do it in a helper. This is so we can check to see if the nmethod we have just
aoqi@0: // searched for an exception handler has been deoptimized in the meantime.
aoqi@0: address Runtime1::exception_handler_for_pc(JavaThread* thread) {
aoqi@0:   oop exception = thread->exception_oop();
aoqi@0:   address pc = thread->exception_pc();
aoqi@0:   // Still in Java mode
aoqi@0:   DEBUG_ONLY(ResetNoHandleMark rnhm);
aoqi@0:   nmethod* nm = NULL;
aoqi@0:   address continuation = NULL;
aoqi@0:   {
aoqi@0:     // Enter VM mode by calling the helper
aoqi@0:     ResetNoHandleMark rnhm;
aoqi@0:     continuation = exception_handler_for_pc_helper(thread, exception, pc, nm);
aoqi@0:   }
aoqi@0:   // Back in JAVA, use no oops DON'T safepoint
aoqi@0: 
aoqi@0:   // Now check to see if the nmethod we were called from is now deoptimized.
aoqi@0:   // If so we must return to the deopt blob and deoptimize the nmethod
aoqi@0:   if (nm != NULL && caller_is_deopted()) {
aoqi@0:     continuation = SharedRuntime::deopt_blob()->unpack_with_exception_in_tls();
aoqi@0:   }
aoqi@0: 
aoqi@0:   assert(continuation != NULL, "no handler found");
aoqi@0:   return continuation;
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::throw_range_check_exception(JavaThread* thread, int index))
aoqi@0:   NOT_PRODUCT(_throw_range_check_exception_count++;)
aoqi@0:   char message[jintAsStringSize];
aoqi@0:   sprintf(message, "%d", index);
aoqi@0:   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArrayIndexOutOfBoundsException(), message);
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::throw_index_exception(JavaThread* thread, int index))
aoqi@0:   NOT_PRODUCT(_throw_index_exception_count++;)
aoqi@0:   char message[16];
aoqi@0:   sprintf(message, "%d", index);
aoqi@0:   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IndexOutOfBoundsException(), message);
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::throw_div0_exception(JavaThread* thread))
aoqi@0:   NOT_PRODUCT(_throw_div0_exception_count++;)
aoqi@0:   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero");
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::throw_null_pointer_exception(JavaThread* thread))
aoqi@0:   NOT_PRODUCT(_throw_null_pointer_exception_count++;)
aoqi@0:   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException());
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::throw_class_cast_exception(JavaThread* thread, oopDesc* object))
aoqi@0:   NOT_PRODUCT(_throw_class_cast_exception_count++;)
aoqi@0:   ResourceMark rm(thread);
aoqi@0:   char* message = SharedRuntime::generate_class_cast_message(
aoqi@0:     thread, object->klass()->external_name());
aoqi@0:   SharedRuntime::throw_and_post_jvmti_exception(
aoqi@0:     thread, vmSymbols::java_lang_ClassCastException(), message);
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::throw_incompatible_class_change_error(JavaThread* thread))
aoqi@0:   NOT_PRODUCT(_throw_incompatible_class_change_error_count++;)
aoqi@0:   ResourceMark rm(thread);
aoqi@0:   SharedRuntime::throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError());
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_ENTRY_NO_ASYNC(void, Runtime1::monitorenter(JavaThread* thread, oopDesc* obj, BasicObjectLock* lock))
aoqi@0:   NOT_PRODUCT(_monitorenter_slowcase_cnt++;)
aoqi@0:   if (PrintBiasedLockingStatistics) {
aoqi@0:     Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
aoqi@0:   }
aoqi@0:   Handle h_obj(thread, obj);
aoqi@0:   assert(h_obj()->is_oop(), "must be NULL or an object");
aoqi@0:   if (UseBiasedLocking) {
aoqi@0:     // Retry fast entry if bias is revoked to avoid unnecessary inflation
aoqi@0:     ObjectSynchronizer::fast_enter(h_obj, lock->lock(), true, CHECK);
aoqi@0:   } else {
aoqi@0:     if (UseFastLocking) {
aoqi@0:       // When using fast locking, the compiled code has already tried the fast case
aoqi@0:       assert(obj == lock->obj(), "must match");
aoqi@0:       ObjectSynchronizer::slow_enter(h_obj, lock->lock(), THREAD);
aoqi@0:     } else {
aoqi@0:       lock->set_obj(obj);
aoqi@0:       ObjectSynchronizer::fast_enter(h_obj, lock->lock(), false, THREAD);
aoqi@0:     }
aoqi@0:   }
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_LEAF(void, Runtime1::monitorexit(JavaThread* thread, BasicObjectLock* lock))
aoqi@0:   NOT_PRODUCT(_monitorexit_slowcase_cnt++;)
aoqi@0:   assert(thread == JavaThread::current(), "threads must correspond");
aoqi@0:   assert(thread->last_Java_sp(), "last_Java_sp must be set");
aoqi@0:   // monitorexit is non-blocking (leaf routine) => no exceptions can be thrown
aoqi@0:   EXCEPTION_MARK;
aoqi@0: 
aoqi@0:   oop obj = lock->obj();
aoqi@0:   assert(obj->is_oop(), "must be NULL or an object");
aoqi@0:   if (UseFastLocking) {
aoqi@0:     // When using fast locking, the compiled code has already tried the fast case
aoqi@0:     ObjectSynchronizer::slow_exit(obj, lock->lock(), THREAD);
aoqi@0:   } else {
aoqi@0:     ObjectSynchronizer::fast_exit(obj, lock->lock(), THREAD);
aoqi@0:   }
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: // Cf. OptoRuntime::deoptimize_caller_frame
aoqi@0: JRT_ENTRY(void, Runtime1::deoptimize(JavaThread* thread))
aoqi@0:   // Called from within the owner thread, so no need for safepoint
aoqi@0:   RegisterMap reg_map(thread, false);
aoqi@0:   frame stub_frame = thread->last_frame();
aoqi@0:   assert(stub_frame.is_runtime_frame(), "sanity check");
aoqi@0:   frame caller_frame = stub_frame.sender(&reg_map);
aoqi@0: 
aoqi@0:   // We are coming from a compiled method; check this is true.
aoqi@0:   assert(CodeCache::find_nmethod(caller_frame.pc()) != NULL, "sanity");
aoqi@0: 
aoqi@0:   // Deoptimize the caller frame.
aoqi@0:   Deoptimization::deoptimize_frame(thread, caller_frame.id());
aoqi@0: 
aoqi@0:   // Return to the now deoptimized frame.
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: static Klass* resolve_field_return_klass(methodHandle caller, int bci, TRAPS) {
aoqi@0:   Bytecode_field field_access(caller, bci);
aoqi@0:   // This can be static or non-static field access
aoqi@0:   Bytecodes::Code code       = field_access.code();
aoqi@0: 
aoqi@0:   // We must load class, initialize class and resolvethe field
aoqi@0:   fieldDescriptor result; // initialize class if needed
aoqi@0:   constantPoolHandle constants(THREAD, caller->constants());
aoqi@0:   LinkResolver::resolve_field_access(result, constants, field_access.index(), Bytecodes::java_code(code), CHECK_NULL);
aoqi@0:   return result.field_holder();
aoqi@0: }
aoqi@0: 
aoqi@0: 
aoqi@0: //
aoqi@0: // This routine patches sites where a class wasn't loaded or
aoqi@0: // initialized at the time the code was generated.  It handles
aoqi@0: // references to classes, fields and forcing of initialization.  Most
aoqi@0: // of the cases are straightforward and involving simply forcing
aoqi@0: // resolution of a class, rewriting the instruction stream with the
aoqi@0: // needed constant and replacing the call in this function with the
aoqi@0: // patched code.  The case for static field is more complicated since
aoqi@0: // the thread which is in the process of initializing a class can
aoqi@0: // access it's static fields but other threads can't so the code
aoqi@0: // either has to deoptimize when this case is detected or execute a
aoqi@0: // check that the current thread is the initializing thread.  The
aoqi@0: // current
aoqi@0: //
aoqi@0: // Patches basically look like this:
aoqi@0: //
aoqi@0: //
aoqi@0: // patch_site: jmp patch stub     ;; will be patched
aoqi@0: // continue:   ...
aoqi@0: //             ...
aoqi@0: //             ...
aoqi@0: //             ...
aoqi@0: //
aoqi@0: // They have a stub which looks like this:
aoqi@0: //
aoqi@0: //             ;; patch body
aoqi@0: //             movl <const>, reg           (for class constants)
aoqi@0: //        <or> movl [reg1 + <const>], reg  (for field offsets)
aoqi@0: //        <or> movl reg, [reg1 + <const>]  (for field offsets)
aoqi@0: //             <being_init offset> <bytes to copy> <bytes to skip>
aoqi@0: // patch_stub: call Runtime1::patch_code (through a runtime stub)
aoqi@0: //             jmp patch_site
aoqi@0: //
aoqi@0: //
aoqi@0: // A normal patch is done by rewriting the patch body, usually a move,
aoqi@0: // and then copying it into place over top of the jmp instruction
aoqi@0: // being careful to flush caches and doing it in an MP-safe way.  The
aoqi@0: // constants following the patch body are used to find various pieces
aoqi@0: // of the patch relative to the call site for Runtime1::patch_code.
aoqi@0: // The case for getstatic and putstatic is more complicated because
aoqi@0: // getstatic and putstatic have special semantics when executing while
aoqi@0: // the class is being initialized.  getstatic/putstatic on a class
aoqi@0: // which is being_initialized may be executed by the initializing
aoqi@0: // thread but other threads have to block when they execute it.  This
aoqi@0: // is accomplished in compiled code by executing a test of the current
aoqi@0: // thread against the initializing thread of the class.  It's emitted
aoqi@0: // as boilerplate in their stub which allows the patched code to be
aoqi@0: // executed before it's copied back into the main body of the nmethod.
aoqi@0: //
aoqi@0: // being_init: get_thread(<tmp reg>
aoqi@0: //             cmpl [reg1 + <init_thread_offset>], <tmp reg>
aoqi@0: //             jne patch_stub
aoqi@0: //             movl [reg1 + <const>], reg  (for field offsets)  <or>
aoqi@0: //             movl reg, [reg1 + <const>]  (for field offsets)
aoqi@0: //             jmp continue
aoqi@0: //             <being_init offset> <bytes to copy> <bytes to skip>
aoqi@0: // patch_stub: jmp Runtim1::patch_code (through a runtime stub)
aoqi@0: //             jmp patch_site
aoqi@0: //
aoqi@0: // If the class is being initialized the patch body is rewritten and
aoqi@0: // the patch site is rewritten to jump to being_init, instead of
aoqi@0: // patch_stub.  Whenever this code is executed it checks the current
aoqi@0: // thread against the intializing thread so other threads will enter
aoqi@0: // the runtime and end up blocked waiting the class to finish
aoqi@0: // initializing inside the calls to resolve_field below.  The
aoqi@0: // initializing class will continue on it's way.  Once the class is
aoqi@0: // fully_initialized, the intializing_thread of the class becomes
aoqi@0: // NULL, so the next thread to execute this code will fail the test,
aoqi@0: // call into patch_code and complete the patching process by copying
aoqi@0: // the patch body back into the main part of the nmethod and resume
aoqi@0: // executing.
aoqi@0: //
aoqi@0: //
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::patch_code(JavaThread* thread, Runtime1::StubID stub_id ))
aoqi@0:   NOT_PRODUCT(_patch_code_slowcase_cnt++;)
aoqi@0: 
aoqi@0:   ResourceMark rm(thread);
aoqi@0:   RegisterMap reg_map(thread, false);
aoqi@0:   frame runtime_frame = thread->last_frame();
aoqi@0:   frame caller_frame = runtime_frame.sender(&reg_map);
aoqi@0: 
aoqi@0:   // last java frame on stack
aoqi@0:   vframeStream vfst(thread, true);
aoqi@0:   assert(!vfst.at_end(), "Java frame must exist");
aoqi@0: 
aoqi@0:   methodHandle caller_method(THREAD, vfst.method());
aoqi@0:   // Note that caller_method->code() may not be same as caller_code because of OSR's
aoqi@0:   // Note also that in the presence of inlining it is not guaranteed
aoqi@0:   // that caller_method() == caller_code->method()
aoqi@0: 
aoqi@0:   int bci = vfst.bci();
aoqi@0:   Bytecodes::Code code = caller_method()->java_code_at(bci);
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0:   // this is used by assertions in the access_field_patching_id
aoqi@0:   BasicType patch_field_type = T_ILLEGAL;
aoqi@0: #endif // PRODUCT
aoqi@0:   bool deoptimize_for_volatile = false;
aoqi@0:   int patch_field_offset = -1;
aoqi@0:   KlassHandle init_klass(THREAD, NULL); // klass needed by load_klass_patching code
aoqi@0:   KlassHandle load_klass(THREAD, NULL); // klass needed by load_klass_patching code
aoqi@0:   Handle mirror(THREAD, NULL);                    // oop needed by load_mirror_patching code
aoqi@0:   Handle appendix(THREAD, NULL);                  // oop needed by appendix_patching code
aoqi@0:   bool load_klass_or_mirror_patch_id =
aoqi@0:     (stub_id == Runtime1::load_klass_patching_id || stub_id == Runtime1::load_mirror_patching_id);
aoqi@0: 
aoqi@0:   if (stub_id == Runtime1::access_field_patching_id) {
aoqi@0: 
aoqi@0:     Bytecode_field field_access(caller_method, bci);
aoqi@0:     fieldDescriptor result; // initialize class if needed
aoqi@0:     Bytecodes::Code code = field_access.code();
aoqi@0:     constantPoolHandle constants(THREAD, caller_method->constants());
aoqi@0:     LinkResolver::resolve_field_access(result, constants, field_access.index(), Bytecodes::java_code(code), CHECK);
aoqi@0:     patch_field_offset = result.offset();
aoqi@0: 
aoqi@0:     // If we're patching a field which is volatile then at compile it
aoqi@0:     // must not have been know to be volatile, so the generated code
aoqi@0:     // isn't correct for a volatile reference.  The nmethod has to be
aoqi@0:     // deoptimized so that the code can be regenerated correctly.
aoqi@0:     // This check is only needed for access_field_patching since this
aoqi@0:     // is the path for patching field offsets.  load_klass is only
aoqi@0:     // used for patching references to oops which don't need special
aoqi@0:     // handling in the volatile case.
aoqi@0:     deoptimize_for_volatile = result.access_flags().is_volatile();
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0:     patch_field_type = result.field_type();
aoqi@0: #endif
aoqi@0:   } else if (load_klass_or_mirror_patch_id) {
aoqi@0:     Klass* k = NULL;
aoqi@0:     switch (code) {
aoqi@0:       case Bytecodes::_putstatic:
aoqi@0:       case Bytecodes::_getstatic:
aoqi@0:         { Klass* klass = resolve_field_return_klass(caller_method, bci, CHECK);
aoqi@0:           init_klass = KlassHandle(THREAD, klass);
aoqi@0:           mirror = Handle(THREAD, klass->java_mirror());
aoqi@0:         }
aoqi@0:         break;
aoqi@0:       case Bytecodes::_new:
aoqi@0:         { Bytecode_new bnew(caller_method(), caller_method->bcp_from(bci));
aoqi@0:           k = caller_method->constants()->klass_at(bnew.index(), CHECK);
aoqi@0:         }
aoqi@0:         break;
aoqi@0:       case Bytecodes::_multianewarray:
aoqi@0:         { Bytecode_multianewarray mna(caller_method(), caller_method->bcp_from(bci));
aoqi@0:           k = caller_method->constants()->klass_at(mna.index(), CHECK);
aoqi@0:         }
aoqi@0:         break;
aoqi@0:       case Bytecodes::_instanceof:
aoqi@0:         { Bytecode_instanceof io(caller_method(), caller_method->bcp_from(bci));
aoqi@0:           k = caller_method->constants()->klass_at(io.index(), CHECK);
aoqi@0:         }
aoqi@0:         break;
aoqi@0:       case Bytecodes::_checkcast:
aoqi@0:         { Bytecode_checkcast cc(caller_method(), caller_method->bcp_from(bci));
aoqi@0:           k = caller_method->constants()->klass_at(cc.index(), CHECK);
aoqi@0:         }
aoqi@0:         break;
aoqi@0:       case Bytecodes::_anewarray:
aoqi@0:         { Bytecode_anewarray anew(caller_method(), caller_method->bcp_from(bci));
aoqi@0:           Klass* ek = caller_method->constants()->klass_at(anew.index(), CHECK);
aoqi@0:           k = ek->array_klass(CHECK);
aoqi@0:         }
aoqi@0:         break;
aoqi@0:       case Bytecodes::_ldc:
aoqi@0:       case Bytecodes::_ldc_w:
aoqi@0:         {
aoqi@0:           Bytecode_loadconstant cc(caller_method, bci);
aoqi@0:           oop m = cc.resolve_constant(CHECK);
aoqi@0:           mirror = Handle(THREAD, m);
aoqi@0:         }
aoqi@0:         break;
aoqi@0:       default: fatal("unexpected bytecode for load_klass_or_mirror_patch_id");
aoqi@0:     }
aoqi@0:     // convert to handle
aoqi@0:     load_klass = KlassHandle(THREAD, k);
aoqi@0:   } else if (stub_id == load_appendix_patching_id) {
aoqi@0:     Bytecode_invoke bytecode(caller_method, bci);
aoqi@0:     Bytecodes::Code bc = bytecode.invoke_code();
aoqi@0: 
aoqi@0:     CallInfo info;
aoqi@0:     constantPoolHandle pool(thread, caller_method->constants());
aoqi@0:     int index = bytecode.index();
aoqi@0:     LinkResolver::resolve_invoke(info, Handle(), pool, index, bc, CHECK);
aoqi@0:     appendix = info.resolved_appendix();
aoqi@0:     switch (bc) {
aoqi@0:       case Bytecodes::_invokehandle: {
aoqi@0:         int cache_index = ConstantPool::decode_cpcache_index(index, true);
aoqi@0:         assert(cache_index >= 0 && cache_index < pool->cache()->length(), "unexpected cache index");
aoqi@0:         pool->cache()->entry_at(cache_index)->set_method_handle(pool, info);
aoqi@0:         break;
aoqi@0:       }
aoqi@0:       case Bytecodes::_invokedynamic: {
aoqi@0:         pool->invokedynamic_cp_cache_entry_at(index)->set_dynamic_call(pool, info);
aoqi@0:         break;
aoqi@0:       }
aoqi@0:       default: fatal("unexpected bytecode for load_appendix_patching_id");
aoqi@0:     }
aoqi@0:   } else {
aoqi@0:     ShouldNotReachHere();
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (deoptimize_for_volatile) {
aoqi@0:     // At compile time we assumed the field wasn't volatile but after
aoqi@0:     // loading it turns out it was volatile so we have to throw the
aoqi@0:     // compiled code out and let it be regenerated.
aoqi@0:     if (TracePatching) {
aoqi@0:       tty->print_cr("Deoptimizing for patching volatile field reference");
aoqi@0:     }
aoqi@0:     // It's possible the nmethod was invalidated in the last
aoqi@0:     // safepoint, but if it's still alive then make it not_entrant.
aoqi@0:     nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
aoqi@0:     if (nm != NULL) {
aoqi@0:       nm->make_not_entrant();
aoqi@0:     }
aoqi@0: 
aoqi@0:     Deoptimization::deoptimize_frame(thread, caller_frame.id());
aoqi@0: 
aoqi@0:     // Return to the now deoptimized frame.
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Now copy code back
aoqi@0: 
aoqi@0:   {
aoqi@0:     MutexLockerEx ml_patch (Patching_lock, Mutex::_no_safepoint_check_flag);
aoqi@0:     //
aoqi@0:     // Deoptimization may have happened while we waited for the lock.
aoqi@0:     // In that case we don't bother to do any patching we just return
aoqi@0:     // and let the deopt happen
aoqi@0:     if (!caller_is_deopted()) {
aoqi@0:       NativeGeneralJump* jump = nativeGeneralJump_at(caller_frame.pc());
aoqi@0:       address instr_pc = jump->jump_destination();
aoqi@0:       NativeInstruction* ni = nativeInstruction_at(instr_pc);
aoqi@0:       if (ni->is_jump() ) {
aoqi@0:         // the jump has not been patched yet
aoqi@0:         // The jump destination is slow case and therefore not part of the stubs
aoqi@0:         // (stubs are only for StaticCalls)
aoqi@0: 
aoqi@0:         // format of buffer
aoqi@0:         //    ....
aoqi@0:         //    instr byte 0     <-- copy_buff
aoqi@0:         //    instr byte 1
aoqi@0:         //    ..
aoqi@0:         //    instr byte n-1
aoqi@0:         //      n
aoqi@0:         //    ....             <-- call destination
aoqi@0: 
aoqi@0:         address stub_location = caller_frame.pc() + PatchingStub::patch_info_offset();
aoqi@1: 
aoqi@1: #if defined(MIPS32) && defined(_LP64)
aoqi@1: /* Jin: In MIPS64, byte_skip is much larger than that in X86. It can not be contained in a byte:
aoqi@1:  *	int bc = 0x20;
aoqi@1:  *	int bs = 0x190;
aoqi@1:  *	int bi = 0x1b0;
aoqi@1:  * 
aoqi@1:  *   To minimize the modification of share codes, the values are decreased 4 times when generated.
aoqi@1:  *   See [mips/c1_CodeStubs_mips.cpp 307] PatchingStub::emit_code().
aoqi@1:  */
aoqi@1:         int bc = *(unsigned char*) (stub_location - 1) * 4;
aoqi@1:         int bs = *(unsigned char*) (stub_location - 2) * 4;
aoqi@1:         int bi = *(unsigned char*) (stub_location - 3) * 4;
aoqi@1: 
aoqi@1: 	int *byte_count = &bc;
aoqi@1: 	int *byte_skip = &bs;
aoqi@1: 	int *being_initialized_entry_offset = &bi;
aoqi@1: #else
aoqi@0:         unsigned char* byte_count = (unsigned char*) (stub_location - 1);
aoqi@0:         unsigned char* byte_skip = (unsigned char*) (stub_location - 2);
aoqi@0:         unsigned char* being_initialized_entry_offset = (unsigned char*) (stub_location - 3);
aoqi@1: #endif
aoqi@0:         address copy_buff = stub_location - *byte_skip - *byte_count;
aoqi@0:         address being_initialized_entry = stub_location - *being_initialized_entry_offset;
aoqi@1: 
aoqi@0:         if (TracePatching) {
aoqi@0:           tty->print_cr(" Patching %s at bci %d at address " INTPTR_FORMAT "  (%s)", Bytecodes::name(code), bci,
aoqi@0:                         p2i(instr_pc), (stub_id == Runtime1::access_field_patching_id) ? "field" : "klass");
aoqi@0:           nmethod* caller_code = CodeCache::find_nmethod(caller_frame.pc());
aoqi@0:           assert(caller_code != NULL, "nmethod not found");
aoqi@0: 
aoqi@0:           // NOTE we use pc() not original_pc() because we already know they are
aoqi@0:           // identical otherwise we'd have never entered this block of code
aoqi@0: 
aoqi@0:           OopMap* map = caller_code->oop_map_for_return_address(caller_frame.pc());
aoqi@0:           assert(map != NULL, "null check");
aoqi@0:           map->print();
aoqi@0:           tty->cr();
aoqi@0: 
aoqi@0:           Disassembler::decode(copy_buff, copy_buff + *byte_count, tty);
aoqi@0:         }
aoqi@0:         // depending on the code below, do_patch says whether to copy the patch body back into the nmethod
aoqi@0:         bool do_patch = true;
aoqi@0:         if (stub_id == Runtime1::access_field_patching_id) {
aoqi@0:           // The offset may not be correct if the class was not loaded at code generation time.
aoqi@0:           // Set it now.
aoqi@0:           NativeMovRegMem* n_move = nativeMovRegMem_at(copy_buff);
aoqi@0:           assert(n_move->offset() == 0 || (n_move->offset() == 4 && (patch_field_type == T_DOUBLE || patch_field_type == T_LONG)), "illegal offset for type");
aoqi@0:           assert(patch_field_offset >= 0, "illegal offset");
aoqi@0:           n_move->add_offset_in_bytes(patch_field_offset);
aoqi@0:         } else if (load_klass_or_mirror_patch_id) {
aoqi@0:           // If a getstatic or putstatic is referencing a klass which
aoqi@0:           // isn't fully initialized, the patch body isn't copied into
aoqi@0:           // place until initialization is complete.  In this case the
aoqi@0:           // patch site is setup so that any threads besides the
aoqi@0:           // initializing thread are forced to come into the VM and
aoqi@0:           // block.
aoqi@0:           do_patch = (code != Bytecodes::_getstatic && code != Bytecodes::_putstatic) ||
aoqi@0:                      InstanceKlass::cast(init_klass())->is_initialized();
aoqi@0:           NativeGeneralJump* jump = nativeGeneralJump_at(instr_pc);
aoqi@0:           if (jump->jump_destination() == being_initialized_entry) {
aoqi@0:             assert(do_patch == true, "initialization must be complete at this point");
aoqi@0:           } else {
aoqi@0:             // patch the instruction <move reg, klass>
aoqi@0:             NativeMovConstReg* n_copy = nativeMovConstReg_at(copy_buff);
aoqi@0: 
aoqi@0:             assert(n_copy->data() == 0 ||
aoqi@0:                    n_copy->data() == (intptr_t)Universe::non_oop_word(),
aoqi@0:                    "illegal init value");
aoqi@0:             if (stub_id == Runtime1::load_klass_patching_id) {
aoqi@0:               assert(load_klass() != NULL, "klass not set");
aoqi@0:               n_copy->set_data((intx) (load_klass()));
aoqi@0:             } else {
aoqi@0:               assert(mirror() != NULL, "klass not set");
stefank@6992:               // Don't need a G1 pre-barrier here since we assert above that data isn't an oop.
aoqi@0:               n_copy->set_data(cast_from_oop<intx>(mirror()));
aoqi@0:             }
aoqi@0: 
aoqi@0:             if (TracePatching) {
aoqi@0:               Disassembler::decode(copy_buff, copy_buff + *byte_count, tty);
aoqi@0:             }
aoqi@0:           }
aoqi@0:         } else if (stub_id == Runtime1::load_appendix_patching_id) {
aoqi@0:           NativeMovConstReg* n_copy = nativeMovConstReg_at(copy_buff);
aoqi@0:           assert(n_copy->data() == 0 ||
aoqi@0:                  n_copy->data() == (intptr_t)Universe::non_oop_word(),
aoqi@0:                  "illegal init value");
aoqi@0:           n_copy->set_data(cast_from_oop<intx>(appendix()));
aoqi@0: 
aoqi@0:           if (TracePatching) {
aoqi@0:             Disassembler::decode(copy_buff, copy_buff + *byte_count, tty);
aoqi@0:           }
aoqi@0:         } else {
aoqi@0:           ShouldNotReachHere();
aoqi@0:         }
aoqi@0: 
aoqi@0: #if defined(SPARC) || defined(PPC)
aoqi@0:         if (load_klass_or_mirror_patch_id ||
aoqi@0:             stub_id == Runtime1::load_appendix_patching_id) {
aoqi@0:           // Update the location in the nmethod with the proper
aoqi@0:           // metadata.  When the code was generated, a NULL was stuffed
aoqi@0:           // in the metadata table and that table needs to be update to
aoqi@0:           // have the right value.  On intel the value is kept
aoqi@0:           // directly in the instruction instead of in the metadata
aoqi@0:           // table, so set_data above effectively updated the value.
aoqi@0:           nmethod* nm = CodeCache::find_nmethod(instr_pc);
aoqi@0:           assert(nm != NULL, "invalid nmethod_pc");
aoqi@0:           RelocIterator mds(nm, copy_buff, copy_buff + 1);
aoqi@0:           bool found = false;
aoqi@0:           while (mds.next() && !found) {
aoqi@0:             if (mds.type() == relocInfo::oop_type) {
aoqi@0:               assert(stub_id == Runtime1::load_mirror_patching_id ||
aoqi@0:                      stub_id == Runtime1::load_appendix_patching_id, "wrong stub id");
aoqi@0:               oop_Relocation* r = mds.oop_reloc();
aoqi@0:               oop* oop_adr = r->oop_addr();
aoqi@0:               *oop_adr = stub_id == Runtime1::load_mirror_patching_id ? mirror() : appendix();
aoqi@0:               r->fix_oop_relocation();
aoqi@0:               found = true;
aoqi@0:             } else if (mds.type() == relocInfo::metadata_type) {
aoqi@0:               assert(stub_id == Runtime1::load_klass_patching_id, "wrong stub id");
aoqi@0:               metadata_Relocation* r = mds.metadata_reloc();
aoqi@0:               Metadata** metadata_adr = r->metadata_addr();
aoqi@0:               *metadata_adr = load_klass();
aoqi@0:               r->fix_metadata_relocation();
aoqi@0:               found = true;
aoqi@0:             }
aoqi@0:           }
aoqi@0:           assert(found, "the metadata must exist!");
aoqi@0:         }
aoqi@0: #endif
aoqi@0:         if (do_patch) {
aoqi@0:           // replace instructions
aoqi@0:           // first replace the tail, then the call
aoqi@0: #ifdef ARM
aoqi@0:           if((load_klass_or_mirror_patch_id ||
aoqi@0:               stub_id == Runtime1::load_appendix_patching_id) &&
dlong@7598:               nativeMovConstReg_at(copy_buff)->is_pc_relative()) {
aoqi@0:             nmethod* nm = CodeCache::find_nmethod(instr_pc);
aoqi@0:             address addr = NULL;
aoqi@0:             assert(nm != NULL, "invalid nmethod_pc");
aoqi@0:             RelocIterator mds(nm, copy_buff, copy_buff + 1);
aoqi@0:             while (mds.next()) {
aoqi@0:               if (mds.type() == relocInfo::oop_type) {
aoqi@0:                 assert(stub_id == Runtime1::load_mirror_patching_id ||
aoqi@0:                        stub_id == Runtime1::load_appendix_patching_id, "wrong stub id");
aoqi@0:                 oop_Relocation* r = mds.oop_reloc();
aoqi@0:                 addr = (address)r->oop_addr();
aoqi@0:                 break;
aoqi@0:               } else if (mds.type() == relocInfo::metadata_type) {
aoqi@0:                 assert(stub_id == Runtime1::load_klass_patching_id, "wrong stub id");
aoqi@0:                 metadata_Relocation* r = mds.metadata_reloc();
aoqi@0:                 addr = (address)r->metadata_addr();
aoqi@0:                 break;
aoqi@0:               }
aoqi@0:             }
aoqi@0:             assert(addr != NULL, "metadata relocation must exist");
aoqi@0:             copy_buff -= *byte_count;
aoqi@0:             NativeMovConstReg* n_copy2 = nativeMovConstReg_at(copy_buff);
aoqi@0:             n_copy2->set_pc_relative_offset(addr, instr_pc);
aoqi@0:           }
aoqi@0: #endif
aoqi@0: 
aoqi@0:           for (int i = NativeCall::instruction_size; i < *byte_count; i++) {
aoqi@0:             address ptr = copy_buff + i;
aoqi@0:             int a_byte = (*ptr) & 0xFF;
aoqi@0:             address dst = instr_pc + i;
aoqi@0:             *(unsigned char*)dst = (unsigned char) a_byte;
aoqi@0:           }
aoqi@0:           ICache::invalidate_range(instr_pc, *byte_count);
aoqi@0:           NativeGeneralJump::replace_mt_safe(instr_pc, copy_buff);
aoqi@0: 
aoqi@0:           if (load_klass_or_mirror_patch_id ||
aoqi@0:               stub_id == Runtime1::load_appendix_patching_id) {
aoqi@0:             relocInfo::relocType rtype =
aoqi@0:               (stub_id == Runtime1::load_klass_patching_id) ?
aoqi@0:                                    relocInfo::metadata_type :
aoqi@0:                                    relocInfo::oop_type;
aoqi@0:             // update relocInfo to metadata
aoqi@0:             nmethod* nm = CodeCache::find_nmethod(instr_pc);
aoqi@0:             assert(nm != NULL, "invalid nmethod_pc");
aoqi@0: 
aoqi@0:             // The old patch site is now a move instruction so update
aoqi@0:             // the reloc info so that it will get updated during
aoqi@0:             // future GCs.
aoqi@0:             RelocIterator iter(nm, (address)instr_pc, (address)(instr_pc + 1));
aoqi@0:             relocInfo::change_reloc_info_for_address(&iter, (address) instr_pc,
aoqi@0:                                                      relocInfo::none, rtype);
aoqi@0: #ifdef SPARC
aoqi@0:             // Sparc takes two relocations for an metadata so update the second one.
aoqi@0:             address instr_pc2 = instr_pc + NativeMovConstReg::add_offset;
aoqi@0:             RelocIterator iter2(nm, instr_pc2, instr_pc2 + 1);
aoqi@0:             relocInfo::change_reloc_info_for_address(&iter2, (address) instr_pc2,
aoqi@0:                                                      relocInfo::none, rtype);
aoqi@0: #endif
aoqi@0: #ifdef PPC
aoqi@0:           { address instr_pc2 = instr_pc + NativeMovConstReg::lo_offset;
aoqi@0:             RelocIterator iter2(nm, instr_pc2, instr_pc2 + 1);
aoqi@0:             relocInfo::change_reloc_info_for_address(&iter2, (address) instr_pc2,
aoqi@0:                                                      relocInfo::none, rtype);
aoqi@0:           }
aoqi@0: #endif
aoqi@0:           }
aoqi@0: 
aoqi@0:         } else {
aoqi@0:           ICache::invalidate_range(copy_buff, *byte_count);
aoqi@0:           NativeGeneralJump::insert_unconditional(instr_pc, being_initialized_entry);
aoqi@0:         }
aoqi@0:       }
aoqi@0:     }
aoqi@0:   }
aoqi@0: 
aoqi@0:   // If we are patching in a non-perm oop, make sure the nmethod
aoqi@0:   // is on the right list.
aoqi@0:   if (ScavengeRootsInCode && ((mirror.not_null() && mirror()->is_scavengable()) ||
aoqi@0:                               (appendix.not_null() && appendix->is_scavengable()))) {
aoqi@0:     MutexLockerEx ml_code (CodeCache_lock, Mutex::_no_safepoint_check_flag);
aoqi@0:     nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
aoqi@0:     guarantee(nm != NULL, "only nmethods can contain non-perm oops");
aoqi@0:     if (!nm->on_scavenge_root_list()) {
aoqi@0:       CodeCache::add_scavenge_root_nmethod(nm);
aoqi@0:     }
aoqi@0: 
aoqi@0:     // Since we've patched some oops in the nmethod,
aoqi@0:     // (re)register it with the heap.
aoqi@0:     Universe::heap()->register_nmethod(nm);
aoqi@0:   }
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: //
aoqi@0: // Entry point for compiled code. We want to patch a nmethod.
aoqi@0: // We don't do a normal VM transition here because we want to
aoqi@0: // know after the patching is complete and any safepoint(s) are taken
aoqi@0: // if the calling nmethod was deoptimized. We do this by calling a
aoqi@0: // helper method which does the normal VM transition and when it
aoqi@0: // completes we can check for deoptimization. This simplifies the
aoqi@0: // assembly code in the cpu directories.
aoqi@0: //
aoqi@0: int Runtime1::move_klass_patching(JavaThread* thread) {
aoqi@0: //
aoqi@0: // NOTE: we are still in Java
aoqi@0: //
aoqi@0:   Thread* THREAD = thread;
aoqi@0:   debug_only(NoHandleMark nhm;)
aoqi@0:   {
aoqi@0:     // Enter VM mode
aoqi@0: 
aoqi@0:     ResetNoHandleMark rnhm;
aoqi@0:     patch_code(thread, load_klass_patching_id);
aoqi@0:   }
aoqi@0:   // Back in JAVA, use no oops DON'T safepoint
aoqi@0: 
aoqi@0:   // Return true if calling code is deoptimized
aoqi@0: 
aoqi@0:   return caller_is_deopted();
aoqi@0: }
aoqi@0: 
aoqi@0: int Runtime1::move_mirror_patching(JavaThread* thread) {
aoqi@0: //
aoqi@0: // NOTE: we are still in Java
aoqi@0: //
aoqi@0:   Thread* THREAD = thread;
aoqi@0:   debug_only(NoHandleMark nhm;)
aoqi@0:   {
aoqi@0:     // Enter VM mode
aoqi@0: 
aoqi@0:     ResetNoHandleMark rnhm;
aoqi@0:     patch_code(thread, load_mirror_patching_id);
aoqi@0:   }
aoqi@0:   // Back in JAVA, use no oops DON'T safepoint
aoqi@0: 
aoqi@0:   // Return true if calling code is deoptimized
aoqi@0: 
aoqi@0:   return caller_is_deopted();
aoqi@0: }
aoqi@0: 
aoqi@0: int Runtime1::move_appendix_patching(JavaThread* thread) {
aoqi@0: //
aoqi@0: // NOTE: we are still in Java
aoqi@0: //
aoqi@0:   Thread* THREAD = thread;
aoqi@0:   debug_only(NoHandleMark nhm;)
aoqi@0:   {
aoqi@0:     // Enter VM mode
aoqi@0: 
aoqi@0:     ResetNoHandleMark rnhm;
aoqi@0:     patch_code(thread, load_appendix_patching_id);
aoqi@0:   }
aoqi@0:   // Back in JAVA, use no oops DON'T safepoint
aoqi@0: 
aoqi@0:   // Return true if calling code is deoptimized
aoqi@0: 
aoqi@0:   return caller_is_deopted();
aoqi@0: }
aoqi@0: //
aoqi@0: // Entry point for compiled code. We want to patch a nmethod.
aoqi@0: // We don't do a normal VM transition here because we want to
aoqi@0: // know after the patching is complete and any safepoint(s) are taken
aoqi@0: // if the calling nmethod was deoptimized. We do this by calling a
aoqi@0: // helper method which does the normal VM transition and when it
aoqi@0: // completes we can check for deoptimization. This simplifies the
aoqi@0: // assembly code in the cpu directories.
aoqi@0: //
aoqi@0: 
aoqi@0: int Runtime1::access_field_patching(JavaThread* thread) {
aoqi@0: //
aoqi@0: // NOTE: we are still in Java
aoqi@0: //
aoqi@0:   Thread* THREAD = thread;
aoqi@0:   debug_only(NoHandleMark nhm;)
aoqi@0:   {
aoqi@0:     // Enter VM mode
aoqi@0: 
aoqi@0:     ResetNoHandleMark rnhm;
aoqi@0:     patch_code(thread, access_field_patching_id);
aoqi@0:   }
aoqi@0:   // Back in JAVA, use no oops DON'T safepoint
aoqi@0: 
aoqi@0:   // Return true if calling code is deoptimized
aoqi@0: 
aoqi@0:   return caller_is_deopted();
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_LEAF(void, Runtime1::trace_block_entry(jint block_id))
aoqi@0:   // for now we just print out the block id
aoqi@0:   tty->print("%d ", block_id);
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: // Array copy return codes.
aoqi@0: enum {
aoqi@0:   ac_failed = -1, // arraycopy failed
aoqi@0:   ac_ok = 0       // arraycopy succeeded
aoqi@0: };
aoqi@0: 
aoqi@0: 
aoqi@0: // Below length is the # elements copied.
aoqi@0: template <class T> int obj_arraycopy_work(oopDesc* src, T* src_addr,
aoqi@0:                                           oopDesc* dst, T* dst_addr,
aoqi@0:                                           int length) {
aoqi@0: 
aoqi@0:   // For performance reasons, we assume we are using a card marking write
aoqi@0:   // barrier. The assert will fail if this is not the case.
aoqi@0:   // Note that we use the non-virtual inlineable variant of write_ref_array.
aoqi@0:   BarrierSet* bs = Universe::heap()->barrier_set();
aoqi@0:   assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
aoqi@0:   assert(bs->has_write_ref_array_pre_opt(), "For pre-barrier as well.");
aoqi@0:   if (src == dst) {
aoqi@0:     // same object, no check
aoqi@0:     bs->write_ref_array_pre(dst_addr, length);
aoqi@0:     Copy::conjoint_oops_atomic(src_addr, dst_addr, length);
aoqi@0:     bs->write_ref_array((HeapWord*)dst_addr, length);
aoqi@0:     return ac_ok;
aoqi@0:   } else {
aoqi@0:     Klass* bound = ObjArrayKlass::cast(dst->klass())->element_klass();
aoqi@0:     Klass* stype = ObjArrayKlass::cast(src->klass())->element_klass();
aoqi@0:     if (stype == bound || stype->is_subtype_of(bound)) {
aoqi@0:       // Elements are guaranteed to be subtypes, so no check necessary
aoqi@0:       bs->write_ref_array_pre(dst_addr, length);
aoqi@0:       Copy::conjoint_oops_atomic(src_addr, dst_addr, length);
aoqi@0:       bs->write_ref_array((HeapWord*)dst_addr, length);
aoqi@0:       return ac_ok;
aoqi@0:     }
aoqi@0:   }
aoqi@0:   return ac_failed;
aoqi@0: }
aoqi@0: 
aoqi@0: // fast and direct copy of arrays; returning -1, means that an exception may be thrown
aoqi@0: // and we did not copy anything
aoqi@0: JRT_LEAF(int, Runtime1::arraycopy(oopDesc* src, int src_pos, oopDesc* dst, int dst_pos, int length))
aoqi@0: #ifndef PRODUCT
aoqi@0:   _generic_arraycopy_cnt++;        // Slow-path oop array copy
aoqi@0: #endif
aoqi@0: 
aoqi@0:   if (src == NULL || dst == NULL || src_pos < 0 || dst_pos < 0 || length < 0) return ac_failed;
aoqi@0:   if (!dst->is_array() || !src->is_array()) return ac_failed;
aoqi@0:   if ((unsigned int) arrayOop(src)->length() < (unsigned int)src_pos + (unsigned int)length) return ac_failed;
aoqi@0:   if ((unsigned int) arrayOop(dst)->length() < (unsigned int)dst_pos + (unsigned int)length) return ac_failed;
aoqi@0: 
aoqi@0:   if (length == 0) return ac_ok;
aoqi@0:   if (src->is_typeArray()) {
aoqi@0:     Klass* klass_oop = src->klass();
aoqi@0:     if (klass_oop != dst->klass()) return ac_failed;
aoqi@0:     TypeArrayKlass* klass = TypeArrayKlass::cast(klass_oop);
aoqi@0:     const int l2es = klass->log2_element_size();
aoqi@0:     const int ihs = klass->array_header_in_bytes() / wordSize;
aoqi@0:     char* src_addr = (char*) ((oopDesc**)src + ihs) + (src_pos << l2es);
aoqi@0:     char* dst_addr = (char*) ((oopDesc**)dst + ihs) + (dst_pos << l2es);
aoqi@0:     // Potential problem: memmove is not guaranteed to be word atomic
aoqi@0:     // Revisit in Merlin
aoqi@0:     memmove(dst_addr, src_addr, length << l2es);
aoqi@0:     return ac_ok;
aoqi@0:   } else if (src->is_objArray() && dst->is_objArray()) {
aoqi@0:     if (UseCompressedOops) {
aoqi@0:       narrowOop *src_addr  = objArrayOop(src)->obj_at_addr<narrowOop>(src_pos);
aoqi@0:       narrowOop *dst_addr  = objArrayOop(dst)->obj_at_addr<narrowOop>(dst_pos);
aoqi@0:       return obj_arraycopy_work(src, src_addr, dst, dst_addr, length);
aoqi@0:     } else {
aoqi@0:       oop *src_addr  = objArrayOop(src)->obj_at_addr<oop>(src_pos);
aoqi@0:       oop *dst_addr  = objArrayOop(dst)->obj_at_addr<oop>(dst_pos);
aoqi@0:       return obj_arraycopy_work(src, src_addr, dst, dst_addr, length);
aoqi@0:     }
aoqi@0:   }
aoqi@0:   return ac_failed;
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_LEAF(void, Runtime1::primitive_arraycopy(HeapWord* src, HeapWord* dst, int length))
aoqi@0: #ifndef PRODUCT
aoqi@0:   _primitive_arraycopy_cnt++;
aoqi@0: #endif
aoqi@0: 
aoqi@0:   if (length == 0) return;
aoqi@0:   // Not guaranteed to be word atomic, but that doesn't matter
aoqi@0:   // for anything but an oop array, which is covered by oop_arraycopy.
aoqi@0:   Copy::conjoint_jbytes(src, dst, length);
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: JRT_LEAF(void, Runtime1::oop_arraycopy(HeapWord* src, HeapWord* dst, int num))
aoqi@0: #ifndef PRODUCT
aoqi@0:   _oop_arraycopy_cnt++;
aoqi@0: #endif
aoqi@0: 
aoqi@0:   if (num == 0) return;
aoqi@0:   BarrierSet* bs = Universe::heap()->barrier_set();
aoqi@0:   assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
aoqi@0:   assert(bs->has_write_ref_array_pre_opt(), "For pre-barrier as well.");
aoqi@0:   if (UseCompressedOops) {
aoqi@0:     bs->write_ref_array_pre((narrowOop*)dst, num);
aoqi@0:     Copy::conjoint_oops_atomic((narrowOop*) src, (narrowOop*) dst, num);
aoqi@0:   } else {
aoqi@0:     bs->write_ref_array_pre((oop*)dst, num);
aoqi@0:     Copy::conjoint_oops_atomic((oop*) src, (oop*) dst, num);
aoqi@0:   }
aoqi@0:   bs->write_ref_array(dst, num);
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: 
aoqi@0: JRT_LEAF(int, Runtime1::is_instance_of(oopDesc* mirror, oopDesc* obj))
aoqi@0:   // had to return int instead of bool, otherwise there may be a mismatch
aoqi@0:   // between the C calling convention and the Java one.
aoqi@0:   // e.g., on x86, GCC may clear only %al when returning a bool false, but
aoqi@0:   // JVM takes the whole %eax as the return value, which may misinterpret
aoqi@0:   // the return value as a boolean true.
aoqi@0: 
aoqi@0:   assert(mirror != NULL, "should null-check on mirror before calling");
aoqi@0:   Klass* k = java_lang_Class::as_Klass(mirror);
aoqi@0:   return (k != NULL && obj != NULL && obj->is_a(k)) ? 1 : 0;
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: JRT_ENTRY(void, Runtime1::predicate_failed_trap(JavaThread* thread))
aoqi@0:   ResourceMark rm;
aoqi@0: 
aoqi@0:   assert(!TieredCompilation, "incompatible with tiered compilation");
aoqi@0: 
aoqi@0:   RegisterMap reg_map(thread, false);
aoqi@0:   frame runtime_frame = thread->last_frame();
aoqi@0:   frame caller_frame = runtime_frame.sender(&reg_map);
aoqi@0: 
aoqi@0:   nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
aoqi@0:   assert (nm != NULL, "no more nmethod?");
aoqi@0:   nm->make_not_entrant();
aoqi@0: 
aoqi@0:   methodHandle m(nm->method());
aoqi@0:   MethodData* mdo = m->method_data();
aoqi@0: 
aoqi@0:   if (mdo == NULL && !HAS_PENDING_EXCEPTION) {
aoqi@0:     // Build an MDO.  Ignore errors like OutOfMemory;
aoqi@0:     // that simply means we won't have an MDO to update.
aoqi@0:     Method::build_interpreter_method_data(m, THREAD);
aoqi@0:     if (HAS_PENDING_EXCEPTION) {
aoqi@0:       assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here");
aoqi@0:       CLEAR_PENDING_EXCEPTION;
aoqi@0:     }
aoqi@0:     mdo = m->method_data();
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (mdo != NULL) {
aoqi@0:     mdo->inc_trap_count(Deoptimization::Reason_none);
aoqi@0:   }
aoqi@0: 
aoqi@0:   if (TracePredicateFailedTraps) {
aoqi@0:     stringStream ss1, ss2;
aoqi@0:     vframeStream vfst(thread);
aoqi@0:     methodHandle inlinee = methodHandle(vfst.method());
aoqi@0:     inlinee->print_short_name(&ss1);
aoqi@0:     m->print_short_name(&ss2);
aoqi@0:     tty->print_cr("Predicate failed trap in method %s at bci %d inlined in %s at pc " INTPTR_FORMAT, ss1.as_string(), vfst.bci(), ss2.as_string(), p2i(caller_frame.pc()));
aoqi@0:   }
aoqi@0: 
aoqi@0: 
aoqi@0:   Deoptimization::deoptimize_frame(thread, caller_frame.id());
aoqi@0: 
aoqi@0: JRT_END
aoqi@0: 
aoqi@0: #ifndef PRODUCT
aoqi@0: void Runtime1::print_statistics() {
aoqi@0:   tty->print_cr("C1 Runtime statistics:");
aoqi@0:   tty->print_cr(" _resolve_invoke_virtual_cnt:     %d", SharedRuntime::_resolve_virtual_ctr);
aoqi@0:   tty->print_cr(" _resolve_invoke_opt_virtual_cnt: %d", SharedRuntime::_resolve_opt_virtual_ctr);
aoqi@0:   tty->print_cr(" _resolve_invoke_static_cnt:      %d", SharedRuntime::_resolve_static_ctr);
aoqi@0:   tty->print_cr(" _handle_wrong_method_cnt:        %d", SharedRuntime::_wrong_method_ctr);
aoqi@0:   tty->print_cr(" _ic_miss_cnt:                    %d", SharedRuntime::_ic_miss_ctr);
aoqi@0:   tty->print_cr(" _generic_arraycopy_cnt:          %d", _generic_arraycopy_cnt);
aoqi@0:   tty->print_cr(" _generic_arraycopystub_cnt:      %d", _generic_arraycopystub_cnt);
aoqi@0:   tty->print_cr(" _byte_arraycopy_cnt:             %d", _byte_arraycopy_cnt);
aoqi@0:   tty->print_cr(" _short_arraycopy_cnt:            %d", _short_arraycopy_cnt);
aoqi@0:   tty->print_cr(" _int_arraycopy_cnt:              %d", _int_arraycopy_cnt);
aoqi@0:   tty->print_cr(" _long_arraycopy_cnt:             %d", _long_arraycopy_cnt);
aoqi@0:   tty->print_cr(" _primitive_arraycopy_cnt:        %d", _primitive_arraycopy_cnt);
aoqi@0:   tty->print_cr(" _oop_arraycopy_cnt (C):          %d", Runtime1::_oop_arraycopy_cnt);
aoqi@0:   tty->print_cr(" _oop_arraycopy_cnt (stub):       %d", _oop_arraycopy_cnt);
aoqi@0:   tty->print_cr(" _arraycopy_slowcase_cnt:         %d", _arraycopy_slowcase_cnt);
aoqi@0:   tty->print_cr(" _arraycopy_checkcast_cnt:        %d", _arraycopy_checkcast_cnt);
aoqi@0:   tty->print_cr(" _arraycopy_checkcast_attempt_cnt:%d", _arraycopy_checkcast_attempt_cnt);
aoqi@0: 
aoqi@0:   tty->print_cr(" _new_type_array_slowcase_cnt:    %d", _new_type_array_slowcase_cnt);
aoqi@0:   tty->print_cr(" _new_object_array_slowcase_cnt:  %d", _new_object_array_slowcase_cnt);
aoqi@0:   tty->print_cr(" _new_instance_slowcase_cnt:      %d", _new_instance_slowcase_cnt);
aoqi@0:   tty->print_cr(" _new_multi_array_slowcase_cnt:   %d", _new_multi_array_slowcase_cnt);
aoqi@0:   tty->print_cr(" _monitorenter_slowcase_cnt:      %d", _monitorenter_slowcase_cnt);
aoqi@0:   tty->print_cr(" _monitorexit_slowcase_cnt:       %d", _monitorexit_slowcase_cnt);
aoqi@0:   tty->print_cr(" _patch_code_slowcase_cnt:        %d", _patch_code_slowcase_cnt);
aoqi@0: 
aoqi@0:   tty->print_cr(" _throw_range_check_exception_count:            %d:", _throw_range_check_exception_count);
aoqi@0:   tty->print_cr(" _throw_index_exception_count:                  %d:", _throw_index_exception_count);
aoqi@0:   tty->print_cr(" _throw_div0_exception_count:                   %d:", _throw_div0_exception_count);
aoqi@0:   tty->print_cr(" _throw_null_pointer_exception_count:           %d:", _throw_null_pointer_exception_count);
aoqi@0:   tty->print_cr(" _throw_class_cast_exception_count:             %d:", _throw_class_cast_exception_count);
aoqi@0:   tty->print_cr(" _throw_incompatible_class_change_error_count:  %d:", _throw_incompatible_class_change_error_count);
aoqi@0:   tty->print_cr(" _throw_array_store_exception_count:            %d:", _throw_array_store_exception_count);
aoqi@0:   tty->print_cr(" _throw_count:                                  %d:", _throw_count);
aoqi@0: 
aoqi@0:   SharedRuntime::print_ic_miss_histogram();
aoqi@0:   tty->cr();
aoqi@0: }
aoqi@0: #endif // PRODUCT