/* * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "classfile/javaClasses.inline.hpp" #include "classfile/systemDictionary.hpp" #include "classfile/vmSymbols.hpp" #include "code/codeCache.hpp" #include "code/codeCacheExtensions.hpp" #include "compiler/compileBroker.hpp" #include "compiler/disassembler.hpp" #include "gc/shared/collectedHeap.hpp" #include "interpreter/interpreter.hpp" #include "interpreter/interpreterRuntime.hpp" #include "interpreter/linkResolver.hpp" #include "interpreter/templateTable.hpp" #include "logging/log.hpp" #include "memory/oopFactory.hpp" #include "memory/universe.inline.hpp" #include "oops/constantPool.hpp" #include "oops/instanceKlass.hpp" #include "oops/methodData.hpp" #include "oops/objArrayKlass.hpp" #include "oops/objArrayOop.inline.hpp" #include "oops/oop.inline.hpp" #include "oops/symbol.hpp" #include "oops/valueKlass.hpp" #include "oops/valueArrayKlass.hpp" #include "oops/valueArrayOop.hpp" #include "prims/jvmtiExport.hpp" #include "prims/nativeLookup.hpp" #include "runtime/atomic.inline.hpp" #include "runtime/biasedLocking.hpp" #include "runtime/compilationPolicy.hpp" #include "runtime/deoptimization.hpp" #include "runtime/fieldDescriptor.hpp" #include "runtime/handles.inline.hpp" #include "runtime/icache.hpp" #include "runtime/interfaceSupport.hpp" #include "runtime/java.hpp" #include "runtime/jfieldIDWorkaround.hpp" #include "runtime/osThread.hpp" #include "runtime/sharedRuntime.hpp" #include "runtime/stubRoutines.hpp" #include "runtime/synchronizer.hpp" #include "runtime/threadCritical.hpp" #include "utilities/events.hpp" #include "utilities/globalDefinitions.hpp" #ifdef COMPILER2 #include "opto/runtime.hpp" #endif class UnlockFlagSaver { private: JavaThread* _thread; bool _do_not_unlock; public: UnlockFlagSaver(JavaThread* t) { _thread = t; _do_not_unlock = t->do_not_unlock_if_synchronized(); t->set_do_not_unlock_if_synchronized(false); } ~UnlockFlagSaver() { _thread->set_do_not_unlock_if_synchronized(_do_not_unlock); } }; //------------------------------------------------------------------------------------------------------------------------ // State accessors void InterpreterRuntime::set_bcp_and_mdp(address bcp, JavaThread *thread) { last_frame(thread).interpreter_frame_set_bcp(bcp); if (ProfileInterpreter) { // ProfileTraps uses MDOs independently of ProfileInterpreter. // That is why we must check both ProfileInterpreter and mdo != NULL. MethodData* mdo = last_frame(thread).interpreter_frame_method()->method_data(); if (mdo != NULL) { NEEDS_CLEANUP; last_frame(thread).interpreter_frame_set_mdp(mdo->bci_to_dp(last_frame(thread).interpreter_frame_bci())); } } } //------------------------------------------------------------------------------------------------------------------------ // Constants IRT_ENTRY(void, InterpreterRuntime::ldc(JavaThread* thread, bool wide)) // access constant pool ConstantPool* pool = method(thread)->constants(); int index = wide ? get_index_u2(thread, Bytecodes::_ldc_w) : get_index_u1(thread, Bytecodes::_ldc); constantTag tag = pool->tag_at(index); assert (tag.is_unresolved_klass() || tag.is_klass(), "wrong ldc call"); Klass* klass = pool->klass_at(index, CHECK); oop java_class = klass->java_mirror(); thread->set_vm_result(java_class); IRT_END IRT_ENTRY(void, InterpreterRuntime::resolve_ldc(JavaThread* thread, Bytecodes::Code bytecode)) { assert(bytecode == Bytecodes::_fast_aldc || bytecode == Bytecodes::_fast_aldc_w, "wrong bc"); ResourceMark rm(thread); methodHandle m (thread, method(thread)); Bytecode_loadconstant ldc(m, bci(thread)); oop result = ldc.resolve_constant(CHECK); #ifdef ASSERT { // The bytecode wrappers aren't GC-safe so construct a new one Bytecode_loadconstant ldc2(m, bci(thread)); oop coop = m->constants()->resolved_references()->obj_at(ldc2.cache_index()); assert(result == coop, "expected result for assembly code"); } #endif thread->set_vm_result(result); } IRT_END //------------------------------------------------------------------------------------------------------------------------ // Allocation IRT_ENTRY(void, InterpreterRuntime::_new(JavaThread* thread, ConstantPool* pool, int index)) Klass* k_oop = pool->klass_at(index, CHECK); instanceKlassHandle klass (THREAD, k_oop); // Make sure we are not instantiating an abstract klass klass->check_valid_for_instantiation(true, CHECK); // Make sure klass is initialized klass->initialize(CHECK); // At this point the class may not be fully initialized // because of recursive initialization. If it is fully // initialized & has_finalized is not set, we rewrite // it into its fast version (Note: no locking is needed // here since this is an atomic byte write and can be // done more than once). // // Note: In case of classes with has_finalized we don't // rewrite since that saves us an extra check in // the fast version which then would call the // slow version anyway (and do a call back into // Java). // If we have a breakpoint, then we don't rewrite // because the _breakpoint bytecode would be lost. oop obj = klass->allocate_instance(CHECK); thread->set_vm_result(obj); IRT_END void copy_primitive_argument(HeapWord* addr, Handle instance, int offset, BasicType type) { switch (type) { case T_BOOLEAN: instance()->bool_field_put(offset, (jboolean)*((int*)addr)); break; case T_CHAR: instance()->char_field_put(offset, (jchar) *((int*)addr)); break; case T_FLOAT: instance()->float_field_put(offset, (jfloat)*((float*)addr)); break; case T_DOUBLE: instance()->double_field_put(offset, (jdouble)*((double*)addr)); break; case T_BYTE: instance()->byte_field_put(offset, (jbyte)*((int*)addr)); break; case T_SHORT: instance()->short_field_put(offset, (jshort)*((int*)addr)); break; case T_INT: instance()->int_field_put(offset, (jint)*((int*)addr)); break; case T_LONG: instance()->long_field_put(offset, (jlong)*((long*)addr)); // Is it correct on 32 and 64 bits? break; case T_OBJECT: case T_ARRAY: fatal("Not supported yet"); break; case T_VALUETYPE: fatal("Should not be handled with this method"); break; default: fatal("Unsupported BasicType"); } } IRT_ENTRY(int, InterpreterRuntime::_vnew(JavaThread* thread, ConstantPool* pool, int index, address sp)) valueKlassHandle vklass_h(ValueKlass::cast(pool->pool_holder())); vklass_h->initialize(THREAD); methodHandle factory_h(vklass_h->factory_method()); #ifdef DEBUG assert(pool->tag_at(index).value() == JVM_CONSTANT_Methodref, "Invalid CP reference for factory"); int class_index = pool->uncached_klass_ref_index_at(index); Symbol* classname = pool->klass_name_at(class_index); assert(classname == vklass_h->name(), "klass mismatch in value factory description"); int method_index = pool->uncached_name_and_type_ref_index_at(index); int method_name_index = pool->name_ref_index_at(method_index); Symbol* method_name = pool->name_ref_at(method_name_index); assert(method_name == factory_h->name(), "factory name mismatch"); #endif if (factory_h() == NULL) { THROW_0(vmSymbols::java_lang_InstantiationException()); } int nargs = factory_h->constMethod()->valuefactory_parameter_mapping_length(); HeapWord* arg_ptr = (HeapWord*)sp; int cursor = 0; // allocate instance instanceOop value = vklass_h->allocate_instance(CHECK_0); Handle value_h = Handle(THREAD, value); assert(value->is_value(), "Sanity check"); // Initializing fields for (int i = nargs - 1 ; i >= 0 ; i--) { int index = factory_h->constMethod()->valuefactory_parameter_mapping_start()[i].data.field_index; int offset = vklass_h->field_offset(index); Symbol* signature = vklass_h->field_signature(index); BasicType type = vmSymbols::signature_type(signature); if (type == T_OBJECT || type == T_ARRAY) { #if 0 // Horrible hack to test oop map iterator... value_h()->obj_field_put(offset, *(oop*)&arg_ptr[cursor]); #else fatal("Objects and arrays not supported in value types yet"); #endif } else if (type == T_VALUETYPE) { Symbol* field_klassname = SignatureStream(signature, false).as_symbol(CHECK_0); // It would be better to have another way to retrieve the field klass // than doing a lookup in the SystemDictionary Klass* field_k = SystemDictionary::resolve_or_null(field_klassname, Handle(vklass_h->class_loader()), Handle(vklass_h->protection_domain()), CHECK_0); if (field_k == NULL) { ResourceMark rm(THREAD); THROW_MSG_0(vmSymbols::java_lang_NoSuchFieldError(), vklass_h->field_name(index)->as_C_string()); } ValueKlass* field_vk = ValueKlass::cast(field_k); int size = field_vk->layout_helper_size_in_bytes(field_vk->layout_helper()); memcpy(((char*)(oopDesc*)value_h()) + offset, (char*)(oopDesc*)*(oop*)&arg_ptr[cursor] + field_vk->first_field_offset(), size - field_vk->first_field_offset()); } else { copy_primitive_argument(&arg_ptr[cursor], value_h, offset, type); } if (type == T_LONG || type == T_DOUBLE) { cursor += 2; } else { cursor += 1; } } thread->set_vm_result(value); // Note: don't forget to pop arguments out of the stack before pushing // the result of the value creation return cursor * Interpreter::stackElementSize; IRT_END IRT_ENTRY(void, InterpreterRuntime::qgetfield(JavaThread* thread, oopDesc* value, ConstantPoolCacheEntry* cp_entry)) Handle value_h(value); assert(cp_entry->is_valuetype(), "Safety check"); instanceKlassHandle klass_h(cp_entry->f1_as_klass()); int offset = cp_entry->f2_as_index(); fieldDescriptor fd; klass_h->find_field_from_offset(offset, false, &fd); Symbol* field_signature = fd.signature(); Symbol* field_klassname = SignatureStream(field_signature, false).as_symbol(CHECK); // It would be better to have another way to retrieve the field klass // than doing a lookup in the SystemDictionary Klass* field_k = SystemDictionary::resolve_or_null(field_klassname, Handle(klass_h->class_loader()), Handle(klass_h->protection_domain()), CHECK); if (field_k == NULL) { ResourceMark rm(THREAD); THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), fd.name()->as_C_string()); } valueKlassHandle field_vklass_h(field_k); // allocate instance instanceOop res = field_vklass_h->allocate_instance(CHECK); // copy value int size = field_vklass_h->layout_helper_size_in_bytes(field_vklass_h->layout_helper()); field_vklass_h->value_store(((char*)(oopDesc*)value_h()) + offset, ((char*)(oopDesc*)res) + field_vklass_h->first_field_offset(),true, false); thread->set_vm_result(res); IRT_END IRT_ENTRY(void, InterpreterRuntime::qputfield(JavaThread* thread, oopDesc* obj, oopDesc* value, ConstantPoolCacheEntry* cp_entry)) Handle value_h(value); Handle obj_h(obj); assert(cp_entry->is_valuetype(), "Safety check"); instanceKlassHandle klass_h(cp_entry->f1_as_klass()); int offset = cp_entry->f2_as_index(); fieldDescriptor fd; klass_h->find_field_from_offset(offset, false, &fd); Symbol* field_signature = fd.signature(); Symbol* field_klassname = SignatureStream(field_signature, false).as_symbol(CHECK); // It would be better to have another way to retrieve the field klass // than doing a lookup in the SystemDictionary Klass* field_k = SystemDictionary::resolve_or_null(field_klassname, Handle(klass_h->class_loader()), Handle(klass_h->protection_domain()), CHECK); if (field_k == NULL) { ResourceMark rm(THREAD); THROW_MSG(vmSymbols::java_lang_NoSuchFieldError(), fd.name()->as_C_string()); } valueKlassHandle field_vklass_h(field_k); // copy value int size = field_vklass_h->layout_helper_size_in_bytes(field_vklass_h->layout_helper()); field_vklass_h->value_store(((char*)(oopDesc*)value_h()) + offset, ((char*)(oopDesc*)obj_h()) + cp_entry->f2_as_offset(), true, false); IRT_END IRT_ENTRY(void, InterpreterRuntime::newarray(JavaThread* thread, BasicType type, jint size)) oop obj = oopFactory::new_typeArray(type, size, CHECK); thread->set_vm_result(obj); IRT_END IRT_ENTRY(void, InterpreterRuntime::anewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) // Note: no oopHandle for pool & klass needed since they are not used // anymore after new_objArray() and no GC can happen before. // (This may have to change if this code changes!) Klass* klass = pool->klass_at(index, CHECK); objArrayOop obj = oopFactory::new_objArray(klass, size, CHECK); thread->set_vm_result(obj); IRT_END IRT_ENTRY(void, InterpreterRuntime::vnewarray(JavaThread* thread, ConstantPool* pool, int index, jint size)) Klass* klass = pool->klass_at(index, CHECK); arrayOop obj = oopFactory::new_valueArray(klass, size, CHECK); thread->set_vm_result(obj); IRT_END IRT_ENTRY(void, InterpreterRuntime::value_array_load(JavaThread* thread, arrayOopDesc* array, int index)) Klass* klass = array->klass(); assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop"); if (klass->is_objArray_klass()) { thread->set_vm_result(((objArrayOop) array)->obj_at(index)); } else { // Early prototype: we don't have valorind support...just allocate aref and copy ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass); valueKlassHandle vklass_h(vaklass->element_klass());; arrayHandle ah(array); instanceOop value_holder = vklass_h->allocate_instance(CHECK); void* src = ((valueArrayOop)ah())->value_at_addr(index, vaklass->layout_helper()); vklass_h->value_store_to_oop(src, value_holder, true); thread->set_vm_result(value_holder); } IRT_END IRT_ENTRY(void, InterpreterRuntime::value_array_store(JavaThread* thread, arrayOopDesc* array, int index, void* val)) Klass* klass = array->klass(); assert(klass->is_valueArray_klass() || klass->is_objArray_klass(), "expected value or object array oop"); if (klass->is_objArray_klass()) { ((objArrayOop) array)->obj_at_put(index, (oop)val); } else { valueArrayOop varray = (valueArrayOop)array; ValueArrayKlass* vaklass = ValueArrayKlass::cast(klass); ValueKlass* vklass = vaklass->element_klass(); const int lh = vaklass->layout_helper(); vklass->value_store_from_oop((oop) val, varray->value_at_addr(index, lh), true, false); } IRT_END IRT_ENTRY(void, InterpreterRuntime::multianewarray(JavaThread* thread, jint* first_size_address)) // We may want to pass in more arguments - could make this slightly faster ConstantPool* constants = method(thread)->constants(); int i = get_index_u2(thread, Bytecodes::_multianewarray); Klass* klass = constants->klass_at(i, CHECK); int nof_dims = number_of_dimensions(thread); assert(klass->is_klass(), "not a class"); assert(nof_dims >= 1, "multianewarray rank must be nonzero"); // We must create an array of jints to pass to multi_allocate. ResourceMark rm(thread); const int small_dims = 10; jint dim_array[small_dims]; jint *dims = &dim_array[0]; if (nof_dims > small_dims) { dims = (jint*) NEW_RESOURCE_ARRAY(jint, nof_dims); } for (int index = 0; index < nof_dims; index++) { // offset from first_size_address is addressed as local[index] int n = Interpreter::local_offset_in_bytes(index)/jintSize; dims[index] = first_size_address[n]; } oop obj = ArrayKlass::cast(klass)->multi_allocate(nof_dims, dims, CHECK); thread->set_vm_result(obj); IRT_END IRT_ENTRY(void, InterpreterRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) assert(obj->is_oop(), "must be a valid oop"); assert(obj->klass()->has_finalizer(), "shouldn't be here otherwise"); InstanceKlass::register_finalizer(instanceOop(obj), CHECK); IRT_END // Quicken instance-of and check-cast bytecodes IRT_ENTRY(void, InterpreterRuntime::quicken_io_cc(JavaThread* thread)) // Force resolving; quicken the bytecode int which = get_index_u2(thread, Bytecodes::_checkcast); ConstantPool* cpool = method(thread)->constants(); // We'd expect to assert that we're only here to quicken bytecodes, but in a multithreaded // program we might have seen an unquick'd bytecode in the interpreter but have another // thread quicken the bytecode before we get here. // assert( cpool->tag_at(which).is_unresolved_klass(), "should only come here to quicken bytecodes" ); Klass* klass = cpool->klass_at(which, CHECK); thread->set_vm_result_2(klass); IRT_END //------------------------------------------------------------------------------------------------------------------------ // Exceptions void InterpreterRuntime::note_trap_inner(JavaThread* thread, int reason, methodHandle trap_method, int trap_bci, TRAPS) { if (trap_method.not_null()) { MethodData* trap_mdo = trap_method->method_data(); if (trap_mdo == NULL) { Method::build_interpreter_method_data(trap_method, THREAD); if (HAS_PENDING_EXCEPTION) { assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); CLEAR_PENDING_EXCEPTION; } trap_mdo = trap_method->method_data(); // and fall through... } if (trap_mdo != NULL) { // Update per-method count of trap events. The interpreter // is updating the MDO to simulate the effect of compiler traps. Deoptimization::update_method_data_from_interpreter(trap_mdo, trap_bci, reason); } } } // Assume the compiler is (or will be) interested in this event. // If necessary, create an MDO to hold the information, and record it. void InterpreterRuntime::note_trap(JavaThread* thread, int reason, TRAPS) { assert(ProfileTraps, "call me only if profiling"); methodHandle trap_method(thread, method(thread)); int trap_bci = trap_method->bci_from(bcp(thread)); note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); } #ifdef CC_INTERP // As legacy note_trap, but we have more arguments. IRT_ENTRY(void, InterpreterRuntime::note_trap(JavaThread* thread, int reason, Method *method, int trap_bci)) methodHandle trap_method(method); note_trap_inner(thread, reason, trap_method, trap_bci, THREAD); IRT_END // Class Deoptimization is not visible in BytecodeInterpreter, so we need a wrapper // for each exception. void InterpreterRuntime::note_nullCheck_trap(JavaThread* thread, Method *method, int trap_bci) { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_null_check, method, trap_bci); } void InterpreterRuntime::note_div0Check_trap(JavaThread* thread, Method *method, int trap_bci) { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_div0_check, method, trap_bci); } void InterpreterRuntime::note_rangeCheck_trap(JavaThread* thread, Method *method, int trap_bci) { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_range_check, method, trap_bci); } void InterpreterRuntime::note_classCheck_trap(JavaThread* thread, Method *method, int trap_bci) { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_class_check, method, trap_bci); } void InterpreterRuntime::note_arrayCheck_trap(JavaThread* thread, Method *method, int trap_bci) { if (ProfileTraps) note_trap(thread, Deoptimization::Reason_array_check, method, trap_bci); } #endif // CC_INTERP static Handle get_preinitialized_exception(Klass* k, TRAPS) { // get klass InstanceKlass* klass = InstanceKlass::cast(k); assert(klass->is_initialized(), "this klass should have been initialized during VM initialization"); // create instance - do not call constructor since we may have no // (java) stack space left (should assert constructor is empty) Handle exception; oop exception_oop = klass->allocate_instance(CHECK_(exception)); exception = Handle(THREAD, exception_oop); if (StackTraceInThrowable) { java_lang_Throwable::fill_in_stack_trace(exception); } return exception; } // Special handling for stack overflow: since we don't have any (java) stack // space left we use the pre-allocated & pre-initialized StackOverflowError // klass to create an stack overflow error instance. We do not call its // constructor for the same reason (it is empty, anyway). IRT_ENTRY(void, InterpreterRuntime::throw_StackOverflowError(JavaThread* thread)) Handle exception = get_preinitialized_exception( SystemDictionary::StackOverflowError_klass(), CHECK); // Increment counter for hs_err file reporting Atomic::inc(&Exceptions::_stack_overflow_errors); THROW_HANDLE(exception); IRT_END IRT_ENTRY(address, InterpreterRuntime::check_ReservedStackAccess_annotated_methods(JavaThread* thread)) frame fr = thread->last_frame(); assert(fr.is_java_frame(), "Must be a Java frame"); frame activation = SharedRuntime::look_for_reserved_stack_annotated_method(thread, fr); if (activation.sp() != NULL) { thread->disable_stack_reserved_zone(); thread->set_reserved_stack_activation((address)activation.unextended_sp()); } return (address)activation.sp(); IRT_END IRT_ENTRY(void, InterpreterRuntime::throw_delayed_StackOverflowError(JavaThread* thread)) Handle exception = get_preinitialized_exception( SystemDictionary::StackOverflowError_klass(), CHECK); java_lang_Throwable::set_message(exception(), Universe::delayed_stack_overflow_error_message()); // Increment counter for hs_err file reporting Atomic::inc(&Exceptions::_stack_overflow_errors); THROW_HANDLE(exception); IRT_END IRT_ENTRY(void, InterpreterRuntime::create_exception(JavaThread* thread, char* name, char* message)) // lookup exception klass TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); if (ProfileTraps) { if (s == vmSymbols::java_lang_ArithmeticException()) { note_trap(thread, Deoptimization::Reason_div0_check, CHECK); } else if (s == vmSymbols::java_lang_NullPointerException()) { note_trap(thread, Deoptimization::Reason_null_check, CHECK); } } // create exception Handle exception = Exceptions::new_exception(thread, s, message); thread->set_vm_result(exception()); IRT_END IRT_ENTRY(void, InterpreterRuntime::create_klass_exception(JavaThread* thread, char* name, oopDesc* obj)) ResourceMark rm(thread); const char* klass_name = obj->klass()->external_name(); // lookup exception klass TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); if (ProfileTraps) { note_trap(thread, Deoptimization::Reason_class_check, CHECK); } // create exception, with klass name as detail message Handle exception = Exceptions::new_exception(thread, s, klass_name); thread->set_vm_result(exception()); IRT_END IRT_ENTRY(void, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException(JavaThread* thread, char* name, jint index)) char message[jintAsStringSize]; // lookup exception klass TempNewSymbol s = SymbolTable::new_symbol(name, CHECK); if (ProfileTraps) { note_trap(thread, Deoptimization::Reason_range_check, CHECK); } // create exception sprintf(message, "%d", index); THROW_MSG(s, message); IRT_END IRT_ENTRY(void, InterpreterRuntime::throw_ClassCastException( JavaThread* thread, oopDesc* obj)) ResourceMark rm(thread); char* message = SharedRuntime::generate_class_cast_message( thread, obj->klass()->external_name()); if (ProfileTraps) { note_trap(thread, Deoptimization::Reason_class_check, CHECK); } // create exception THROW_MSG(vmSymbols::java_lang_ClassCastException(), message); IRT_END // exception_handler_for_exception(...) returns the continuation address, // the exception oop (via TLS) and sets the bci/bcp for the continuation. // The exception oop is returned to make sure it is preserved over GC (it // is only on the stack if the exception was thrown explicitly via athrow). // During this operation, the expression stack contains the values for the // bci where the exception happened. If the exception was propagated back // from a call, the expression stack contains the values for the bci at the // invoke w/o arguments (i.e., as if one were inside the call). IRT_ENTRY(address, InterpreterRuntime::exception_handler_for_exception(JavaThread* thread, oopDesc* exception)) Handle h_exception(thread, exception); methodHandle h_method (thread, method(thread)); constantPoolHandle h_constants(thread, h_method->constants()); bool should_repeat; int handler_bci; int current_bci = bci(thread); if (thread->frames_to_pop_failed_realloc() > 0) { // Allocation of scalar replaced object used in this frame // failed. Unconditionally pop the frame. thread->dec_frames_to_pop_failed_realloc(); thread->set_vm_result(h_exception()); // If the method is synchronized we already unlocked the monitor // during deoptimization so the interpreter needs to skip it when // the frame is popped. thread->set_do_not_unlock_if_synchronized(true); #ifdef CC_INTERP return (address) -1; #else return Interpreter::remove_activation_entry(); #endif } // Need to do this check first since when _do_not_unlock_if_synchronized // is set, we don't want to trigger any classloading which may make calls // into java, or surprisingly find a matching exception handler for bci 0 // since at this moment the method hasn't been "officially" entered yet. if (thread->do_not_unlock_if_synchronized()) { ResourceMark rm; assert(current_bci == 0, "bci isn't zero for do_not_unlock_if_synchronized"); thread->set_vm_result(exception); #ifdef CC_INTERP return (address) -1; #else return Interpreter::remove_activation_entry(); #endif } do { should_repeat = false; // assertions #ifdef ASSERT assert(h_exception.not_null(), "NULL exceptions should be handled by athrow"); assert(h_exception->is_oop(), "just checking"); // Check that exception is a subclass of Throwable, otherwise we have a VerifyError if (!(h_exception->is_a(SystemDictionary::Throwable_klass()))) { if (ExitVMOnVerifyError) vm_exit(-1); ShouldNotReachHere(); } #endif // tracing if (log_is_enabled(Info, exceptions)) { ResourceMark rm(thread); stringStream tempst; tempst.print("interpreter method <%s>\n" " at bci %d for thread " INTPTR_FORMAT, h_method->print_value_string(), current_bci, p2i(thread)); Exceptions::log_exception(h_exception, tempst); } // Don't go paging in something which won't be used. // else if (extable->length() == 0) { // // disabled for now - interpreter is not using shortcut yet // // (shortcut is not to call runtime if we have no exception handlers) // // warning("performance bug: should not call runtime if method has no exception handlers"); // } // for AbortVMOnException flag Exceptions::debug_check_abort(h_exception); // exception handler lookup KlassHandle h_klass(THREAD, h_exception->klass()); handler_bci = Method::fast_exception_handler_bci_for(h_method, h_klass, current_bci, THREAD); if (HAS_PENDING_EXCEPTION) { // We threw an exception while trying to find the exception handler. // Transfer the new exception to the exception handle which will // be set into thread local storage, and do another lookup for an // exception handler for this exception, this time starting at the // BCI of the exception handler which caused the exception to be // thrown (bug 4307310). h_exception = Handle(THREAD, PENDING_EXCEPTION); CLEAR_PENDING_EXCEPTION; if (handler_bci >= 0) { current_bci = handler_bci; should_repeat = true; } } } while (should_repeat == true); #if INCLUDE_JVMCI if (EnableJVMCI && h_method->method_data() != NULL) { ResourceMark rm(thread); ProfileData* pdata = h_method->method_data()->allocate_bci_to_data(current_bci, NULL); if (pdata != NULL && pdata->is_BitData()) { BitData* bit_data = (BitData*) pdata; bit_data->set_exception_seen(); } } #endif // notify JVMTI of an exception throw; JVMTI will detect if this is a first // time throw or a stack unwinding throw and accordingly notify the debugger if (JvmtiExport::can_post_on_exceptions()) { JvmtiExport::post_exception_throw(thread, h_method(), bcp(thread), h_exception()); } #ifdef CC_INTERP address continuation = (address)(intptr_t) handler_bci; #else address continuation = NULL; #endif address handler_pc = NULL; if (handler_bci < 0 || !thread->reguard_stack((address) &continuation)) { // Forward exception to callee (leaving bci/bcp untouched) because (a) no // handler in this method, or (b) after a stack overflow there is not yet // enough stack space available to reprotect the stack. #ifndef CC_INTERP continuation = Interpreter::remove_activation_entry(); #endif // Count this for compilation purposes h_method->interpreter_throwout_increment(THREAD); } else { // handler in this method => change bci/bcp to handler bci/bcp and continue there handler_pc = h_method->code_base() + handler_bci; #ifndef CC_INTERP set_bcp_and_mdp(handler_pc, thread); continuation = Interpreter::dispatch_table(vtos)[*handler_pc]; #endif } // notify debugger of an exception catch // (this is good for exceptions caught in native methods as well) if (JvmtiExport::can_post_on_exceptions()) { JvmtiExport::notice_unwind_due_to_exception(thread, h_method(), handler_pc, h_exception(), (handler_pc != NULL)); } thread->set_vm_result(h_exception()); return continuation; IRT_END IRT_ENTRY(void, InterpreterRuntime::throw_pending_exception(JavaThread* thread)) assert(thread->has_pending_exception(), "must only ne called if there's an exception pending"); // nothing to do - eventually we should remove this code entirely (see comments @ call sites) IRT_END IRT_ENTRY(void, InterpreterRuntime::throw_AbstractMethodError(JavaThread* thread)) THROW(vmSymbols::java_lang_AbstractMethodError()); IRT_END IRT_ENTRY(void, InterpreterRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) THROW(vmSymbols::java_lang_IncompatibleClassChangeError()); IRT_END //------------------------------------------------------------------------------------------------------------------------ // Fields // void InterpreterRuntime::resolve_get_put(JavaThread* thread, Bytecodes::Code bytecode) { Thread* THREAD = thread; // resolve field fieldDescriptor info; constantPoolHandle pool(thread, method(thread)->constants()); bool is_put = (bytecode == Bytecodes::_putfield || bytecode == Bytecodes::_nofast_putfield || bytecode == Bytecodes::_putstatic); bool is_static = (bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic); { JvmtiHideSingleStepping jhss(thread); LinkResolver::resolve_field_access(info, pool, get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); } // end JvmtiHideSingleStepping // check if link resolution caused cpCache to be updated ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); if (cp_cache_entry->is_resolved(bytecode)) return; // compute auxiliary field attributes TosState state = as_TosState(info.field_type()); // We need to delay resolving put instructions on final fields // until we actually invoke one. This is required so we throw // exceptions at the correct place. If we do not resolve completely // in the current pass, leaving the put_code set to zero will // cause the next put instruction to reresolve. Bytecodes::Code put_code = (Bytecodes::Code)0; // We also need to delay resolving getstatic instructions until the // class is intitialized. This is required so that access to the static // field will call the initialization function every time until the class // is completely initialized ala. in 2.17.5 in JVM Specification. InstanceKlass* klass = InstanceKlass::cast(info.field_holder()); bool uninitialized_static = ((bytecode == Bytecodes::_getstatic || bytecode == Bytecodes::_putstatic) && !klass->is_initialized()); Bytecodes::Code get_code = (Bytecodes::Code)0; if (!uninitialized_static) { get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); if (is_put || !info.access_flags().is_final()) { put_code = ((is_static) ? Bytecodes::_putstatic : Bytecodes::_putfield); } } cp_cache_entry->set_field( get_code, put_code, info.field_holder(), info.index(), info.offset(), state, info.access_flags().is_final(), info.access_flags().is_volatile(), pool->pool_holder() ); } //------------------------------------------------------------------------------------------------------------------------ // Synchronization // // The interpreter's synchronization code is factored out so that it can // be shared by method invocation and synchronized blocks. //%note synchronization_3 //%note monitor_1 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorenter(JavaThread* thread, BasicObjectLock* elem)) #ifdef ASSERT thread->last_frame().interpreter_frame_verify_monitor(elem); #endif if (PrintBiasedLockingStatistics) { Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); } Handle h_obj(thread, elem->obj()); assert(Universe::heap()->is_in_reserved_or_null(h_obj()), "must be NULL or an object"); if (UseBiasedLocking) { // Retry fast entry if bias is revoked to avoid unnecessary inflation ObjectSynchronizer::fast_enter(h_obj, elem->lock(), true, CHECK); } else { ObjectSynchronizer::slow_enter(h_obj, elem->lock(), CHECK); } assert(Universe::heap()->is_in_reserved_or_null(elem->obj()), "must be NULL or an object"); #ifdef ASSERT thread->last_frame().interpreter_frame_verify_monitor(elem); #endif IRT_END //%note monitor_1 IRT_ENTRY_NO_ASYNC(void, InterpreterRuntime::monitorexit(JavaThread* thread, BasicObjectLock* elem)) #ifdef ASSERT thread->last_frame().interpreter_frame_verify_monitor(elem); #endif Handle h_obj(thread, elem->obj()); assert(Universe::heap()->is_in_reserved_or_null(h_obj()), "must be NULL or an object"); if (elem == NULL || h_obj()->is_unlocked()) { THROW(vmSymbols::java_lang_IllegalMonitorStateException()); } ObjectSynchronizer::slow_exit(h_obj(), elem->lock(), thread); // Free entry. This must be done here, since a pending exception might be installed on // exit. If it is not cleared, the exception handling code will try to unlock the monitor again. elem->set_obj(NULL); #ifdef ASSERT thread->last_frame().interpreter_frame_verify_monitor(elem); #endif IRT_END IRT_ENTRY(void, InterpreterRuntime::throw_illegal_monitor_state_exception(JavaThread* thread)) THROW(vmSymbols::java_lang_IllegalMonitorStateException()); IRT_END IRT_ENTRY(void, InterpreterRuntime::new_illegal_monitor_state_exception(JavaThread* thread)) // Returns an illegal exception to install into the current thread. The // pending_exception flag is cleared so normal exception handling does not // trigger. Any current installed exception will be overwritten. This // method will be called during an exception unwind. assert(!HAS_PENDING_EXCEPTION, "no pending exception"); Handle exception(thread, thread->vm_result()); assert(exception() != NULL, "vm result should be set"); thread->set_vm_result(NULL); // clear vm result before continuing (may cause memory leaks and assert failures) if (!exception->is_a(SystemDictionary::ThreadDeath_klass())) { exception = get_preinitialized_exception( SystemDictionary::IllegalMonitorStateException_klass(), CATCH); } thread->set_vm_result(exception()); IRT_END //------------------------------------------------------------------------------------------------------------------------ // Invokes IRT_ENTRY(Bytecodes::Code, InterpreterRuntime::get_original_bytecode_at(JavaThread* thread, Method* method, address bcp)) return method->orig_bytecode_at(method->bci_from(bcp)); IRT_END IRT_ENTRY(void, InterpreterRuntime::set_original_bytecode_at(JavaThread* thread, Method* method, address bcp, Bytecodes::Code new_code)) method->set_orig_bytecode_at(method->bci_from(bcp), new_code); IRT_END IRT_ENTRY(void, InterpreterRuntime::_breakpoint(JavaThread* thread, Method* method, address bcp)) JvmtiExport::post_raw_breakpoint(thread, method, bcp); IRT_END void InterpreterRuntime::resolve_invoke(JavaThread* thread, Bytecodes::Code bytecode) { Thread* THREAD = thread; // extract receiver from the outgoing argument list if necessary Handle receiver(thread, NULL); if (bytecode == Bytecodes::_invokevirtual || bytecode == Bytecodes::_invokeinterface || bytecode == Bytecodes::_invokedirect) { ResourceMark rm(thread); methodHandle m (thread, method(thread)); Bytecode_invoke call(m, bci(thread)); Symbol* signature = call.signature(); receiver = Handle(thread, thread->last_frame().interpreter_callee_receiver(signature)); assert(Universe::heap()->is_in_reserved_or_null(receiver()), "sanity check"); assert(receiver.is_null() || !Universe::heap()->is_in_reserved(receiver->klass()), "sanity check"); } // resolve method CallInfo info; constantPoolHandle pool(thread, method(thread)->constants()); { JvmtiHideSingleStepping jhss(thread); LinkResolver::resolve_invoke(info, receiver, pool, get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); if (JvmtiExport::can_hotswap_or_post_breakpoint()) { int retry_count = 0; while (info.resolved_method()->is_old()) { // It is very unlikely that method is redefined more than 100 times // in the middle of resolve. If it is looping here more than 100 times // means then there could be a bug here. guarantee((retry_count++ < 100), "Could not resolve to latest version of redefined method"); // method is redefined in the middle of resolve so re-try. LinkResolver::resolve_invoke(info, receiver, pool, get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); } } } // end JvmtiHideSingleStepping assert(!(bytecode == Bytecodes::_invokedirect && info.call_kind() != CallInfo::direct_call), "the target of a invokedirect bytecode must be a direct call"); // check if link resolution caused cpCache to be updated ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); if (cp_cache_entry->is_resolved(bytecode)) return; #ifdef ASSERT if (bytecode == Bytecodes::_invokeinterface) { if (info.resolved_method()->method_holder() == SystemDictionary::Object_klass()) { // NOTE: THIS IS A FIX FOR A CORNER CASE in the JVM spec // (see also CallInfo::set_interface for details) assert(info.call_kind() == CallInfo::vtable_call || info.call_kind() == CallInfo::direct_call, ""); methodHandle rm = info.resolved_method(); assert(rm->is_final() || info.has_vtable_index(), "should have been set already"); } else if (!info.resolved_method()->has_itable_index()) { // Resolved something like CharSequence.toString. Use vtable not itable. assert(info.call_kind() != CallInfo::itable_call, ""); } else { // Setup itable entry assert(info.call_kind() == CallInfo::itable_call, ""); int index = info.resolved_method()->itable_index(); assert(info.itable_index() == index, ""); } } else { assert(info.call_kind() == CallInfo::direct_call || info.call_kind() == CallInfo::vtable_call, ""); } #endif switch (info.call_kind()) { case CallInfo::direct_call: cp_cache_entry->set_direct_call( bytecode, info.resolved_method()); break; case CallInfo::vtable_call: cp_cache_entry->set_vtable_call( bytecode, info.resolved_method(), info.vtable_index()); break; case CallInfo::itable_call: cp_cache_entry->set_itable_call( bytecode, info.resolved_method(), info.itable_index()); break; default: ShouldNotReachHere(); } } // First time execution: Resolve symbols, create a permanent MethodType object. void InterpreterRuntime::resolve_invokehandle(JavaThread* thread) { Thread* THREAD = thread; const Bytecodes::Code bytecode = Bytecodes::_invokehandle; // resolve method CallInfo info; constantPoolHandle pool(thread, method(thread)->constants()); { JvmtiHideSingleStepping jhss(thread); LinkResolver::resolve_invoke(info, Handle(), pool, get_index_u2_cpcache(thread, bytecode), bytecode, CHECK); } // end JvmtiHideSingleStepping ConstantPoolCacheEntry* cp_cache_entry = cache_entry(thread); cp_cache_entry->set_method_handle(pool, info); } // First time execution: Resolve symbols, create a permanent CallSite object. void InterpreterRuntime::resolve_invokedynamic(JavaThread* thread) { Thread* THREAD = thread; const Bytecodes::Code bytecode = Bytecodes::_invokedynamic; //TO DO: consider passing BCI to Java. // int caller_bci = method(thread)->bci_from(bcp(thread)); // resolve method CallInfo info; constantPoolHandle pool(thread, method(thread)->constants()); int index = get_index_u4(thread, bytecode); { JvmtiHideSingleStepping jhss(thread); LinkResolver::resolve_invoke(info, Handle(), pool, index, bytecode, CHECK); } // end JvmtiHideSingleStepping ConstantPoolCacheEntry* cp_cache_entry = pool->invokedynamic_cp_cache_entry_at(index); cp_cache_entry->set_dynamic_call(pool, info); } // This function is the interface to the assembly code. It returns the resolved // cpCache entry. This doesn't safepoint, but the helper routines safepoint. // This function will check for redefinition! IRT_ENTRY(void, InterpreterRuntime::resolve_from_cache(JavaThread* thread, Bytecodes::Code bytecode)) { switch (bytecode) { case Bytecodes::_getstatic: case Bytecodes::_putstatic: case Bytecodes::_getfield: case Bytecodes::_putfield: case Bytecodes::_vgetfield: resolve_get_put(thread, bytecode); break; case Bytecodes::_invokevirtual: case Bytecodes::_invokedirect: case Bytecodes::_invokespecial: case Bytecodes::_invokestatic: case Bytecodes::_invokeinterface: resolve_invoke(thread, bytecode); break; case Bytecodes::_invokehandle: resolve_invokehandle(thread); break; case Bytecodes::_invokedynamic: resolve_invokedynamic(thread); break; default: fatal("unexpected bytecode: %s", Bytecodes::name(bytecode)); break; } } IRT_END //------------------------------------------------------------------------------------------------------------------------ // Miscellaneous nmethod* InterpreterRuntime::frequency_counter_overflow(JavaThread* thread, address branch_bcp) { nmethod* nm = frequency_counter_overflow_inner(thread, branch_bcp); assert(branch_bcp != NULL || nm == NULL, "always returns null for non OSR requests"); if (branch_bcp != NULL && nm != NULL) { // This was a successful request for an OSR nmethod. Because // frequency_counter_overflow_inner ends with a safepoint check, // nm could have been unloaded so look it up again. It's unsafe // to examine nm directly since it might have been freed and used // for something else. frame fr = thread->last_frame(); Method* method = fr.interpreter_frame_method(); int bci = method->bci_from(fr.interpreter_frame_bcp()); nm = method->lookup_osr_nmethod_for(bci, CompLevel_none, false); } #ifndef PRODUCT if (TraceOnStackReplacement) { if (nm != NULL) { tty->print("OSR entry @ pc: " INTPTR_FORMAT ": ", p2i(nm->osr_entry())); nm->print(); } } #endif return nm; } IRT_ENTRY(nmethod*, InterpreterRuntime::frequency_counter_overflow_inner(JavaThread* thread, address branch_bcp)) // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized // flag, in case this method triggers classloading which will call into Java. UnlockFlagSaver fs(thread); frame fr = thread->last_frame(); assert(fr.is_interpreted_frame(), "must come from interpreter"); methodHandle method(thread, fr.interpreter_frame_method()); const int branch_bci = branch_bcp != NULL ? method->bci_from(branch_bcp) : InvocationEntryBci; const int bci = branch_bcp != NULL ? method->bci_from(fr.interpreter_frame_bcp()) : InvocationEntryBci; assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending"); nmethod* osr_nm = CompilationPolicy::policy()->event(method, method, branch_bci, bci, CompLevel_none, NULL, thread); assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions"); if (osr_nm != NULL) { // We may need to do on-stack replacement which requires that no // monitors in the activation are biased because their // BasicObjectLocks will need to migrate during OSR. Force // unbiasing of all monitors in the activation now (even though // the OSR nmethod might be invalidated) because we don't have a // safepoint opportunity later once the migration begins. if (UseBiasedLocking) { ResourceMark rm; GrowableArray* objects_to_revoke = new GrowableArray(); for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); kptr < fr.interpreter_frame_monitor_begin(); kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { if( kptr->obj() != NULL ) { objects_to_revoke->append(Handle(THREAD, kptr->obj())); } } BiasedLocking::revoke(objects_to_revoke); } } return osr_nm; IRT_END IRT_LEAF(jint, InterpreterRuntime::bcp_to_di(Method* method, address cur_bcp)) assert(ProfileInterpreter, "must be profiling interpreter"); int bci = method->bci_from(cur_bcp); MethodData* mdo = method->method_data(); if (mdo == NULL) return 0; return mdo->bci_to_di(bci); IRT_END IRT_ENTRY(void, InterpreterRuntime::profile_method(JavaThread* thread)) // use UnlockFlagSaver to clear and restore the _do_not_unlock_if_synchronized // flag, in case this method triggers classloading which will call into Java. UnlockFlagSaver fs(thread); assert(ProfileInterpreter, "must be profiling interpreter"); frame fr = thread->last_frame(); assert(fr.is_interpreted_frame(), "must come from interpreter"); methodHandle method(thread, fr.interpreter_frame_method()); Method::build_interpreter_method_data(method, THREAD); if (HAS_PENDING_EXCEPTION) { assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); CLEAR_PENDING_EXCEPTION; // and fall through... } IRT_END #ifdef ASSERT IRT_LEAF(void, InterpreterRuntime::verify_mdp(Method* method, address bcp, address mdp)) assert(ProfileInterpreter, "must be profiling interpreter"); MethodData* mdo = method->method_data(); assert(mdo != NULL, "must not be null"); int bci = method->bci_from(bcp); address mdp2 = mdo->bci_to_dp(bci); if (mdp != mdp2) { ResourceMark rm; ResetNoHandleMark rnm; // In a LEAF entry. HandleMark hm; tty->print_cr("FAILED verify : actual mdp %p expected mdp %p @ bci %d", mdp, mdp2, bci); int current_di = mdo->dp_to_di(mdp); int expected_di = mdo->dp_to_di(mdp2); tty->print_cr(" actual di %d expected di %d", current_di, expected_di); int expected_approx_bci = mdo->data_at(expected_di)->bci(); int approx_bci = -1; if (current_di >= 0) { approx_bci = mdo->data_at(current_di)->bci(); } tty->print_cr(" actual bci is %d expected bci %d", approx_bci, expected_approx_bci); mdo->print_on(tty); method->print_codes(); } assert(mdp == mdp2, "wrong mdp"); IRT_END #endif // ASSERT IRT_ENTRY(void, InterpreterRuntime::update_mdp_for_ret(JavaThread* thread, int return_bci)) assert(ProfileInterpreter, "must be profiling interpreter"); ResourceMark rm(thread); HandleMark hm(thread); frame fr = thread->last_frame(); assert(fr.is_interpreted_frame(), "must come from interpreter"); MethodData* h_mdo = fr.interpreter_frame_method()->method_data(); // Grab a lock to ensure atomic access to setting the return bci and // the displacement. This can block and GC, invalidating all naked oops. MutexLocker ml(RetData_lock); // ProfileData is essentially a wrapper around a derived oop, so we // need to take the lock before making any ProfileData structures. ProfileData* data = h_mdo->data_at(h_mdo->dp_to_di(fr.interpreter_frame_mdp())); RetData* rdata = data->as_RetData(); address new_mdp = rdata->fixup_ret(return_bci, h_mdo); fr.interpreter_frame_set_mdp(new_mdp); IRT_END IRT_ENTRY(MethodCounters*, InterpreterRuntime::build_method_counters(JavaThread* thread, Method* m)) MethodCounters* mcs = Method::build_method_counters(m, thread); if (HAS_PENDING_EXCEPTION) { assert((PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())), "we expect only an OOM error here"); CLEAR_PENDING_EXCEPTION; } return mcs; IRT_END IRT_ENTRY(void, InterpreterRuntime::at_safepoint(JavaThread* thread)) // We used to need an explict preserve_arguments here for invoke bytecodes. However, // stack traversal automatically takes care of preserving arguments for invoke, so // this is no longer needed. // IRT_END does an implicit safepoint check, hence we are guaranteed to block // if this is called during a safepoint if (JvmtiExport::should_post_single_step()) { // We are called during regular safepoints and when the VM is // single stepping. If any thread is marked for single stepping, // then we may have JVMTI work to do. JvmtiExport::at_single_stepping_point(thread, method(thread), bcp(thread)); } IRT_END IRT_ENTRY(void, InterpreterRuntime::post_field_access(JavaThread *thread, oopDesc* obj, ConstantPoolCacheEntry *cp_entry)) // check the access_flags for the field in the klass InstanceKlass* ik = InstanceKlass::cast(cp_entry->f1_as_klass()); int index = cp_entry->field_index(); if ((ik->field_access_flags(index) & JVM_ACC_FIELD_ACCESS_WATCHED) == 0) return; bool is_static = (obj == NULL); HandleMark hm(thread); Handle h_obj; if (!is_static) { // non-static field accessors have an object, but we need a handle h_obj = Handle(thread, obj); } instanceKlassHandle h_cp_entry_f1(thread, (Klass*)cp_entry->f1_as_klass()); jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_cp_entry_f1, cp_entry->f2_as_index(), is_static); JvmtiExport::post_field_access(thread, method(thread), bcp(thread), h_cp_entry_f1, h_obj, fid); IRT_END IRT_ENTRY(void, InterpreterRuntime::post_field_modification(JavaThread *thread, oopDesc* obj, ConstantPoolCacheEntry *cp_entry, jvalue *value)) Klass* k = (Klass*)cp_entry->f1_as_klass(); // check the access_flags for the field in the klass InstanceKlass* ik = InstanceKlass::cast(k); int index = cp_entry->field_index(); // bail out if field modifications are not watched if ((ik->field_access_flags(index) & JVM_ACC_FIELD_MODIFICATION_WATCHED) == 0) return; char sig_type = '\0'; switch(cp_entry->flag_state()) { case btos: sig_type = 'Z'; break; case ctos: sig_type = 'C'; break; case stos: sig_type = 'S'; break; case itos: sig_type = 'I'; break; case ftos: sig_type = 'F'; break; case atos: sig_type = 'L'; break; case ltos: sig_type = 'J'; break; case dtos: sig_type = 'D'; break; default: ShouldNotReachHere(); return; } bool is_static = (obj == NULL); HandleMark hm(thread); instanceKlassHandle h_klass(thread, k); jfieldID fid = jfieldIDWorkaround::to_jfieldID(h_klass, cp_entry->f2_as_index(), is_static); jvalue fvalue; #ifdef _LP64 fvalue = *value; #else // Long/double values are stored unaligned and also noncontiguously with // tagged stacks. We can't just do a simple assignment even in the non- // J/D cases because a C++ compiler is allowed to assume that a jvalue is // 8-byte aligned, and interpreter stack slots are only 4-byte aligned. // We assume that the two halves of longs/doubles are stored in interpreter // stack slots in platform-endian order. jlong_accessor u; jint* newval = (jint*)value; u.words[0] = newval[0]; u.words[1] = newval[Interpreter::stackElementWords]; // skip if tag fvalue.j = u.long_value; #endif // _LP64 Handle h_obj; if (!is_static) { // non-static field accessors have an object, but we need a handle h_obj = Handle(thread, obj); } JvmtiExport::post_raw_field_modification(thread, method(thread), bcp(thread), h_klass, h_obj, fid, sig_type, &fvalue); IRT_END IRT_ENTRY(void, InterpreterRuntime::post_method_entry(JavaThread *thread)) JvmtiExport::post_method_entry(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); IRT_END IRT_ENTRY(void, InterpreterRuntime::post_method_exit(JavaThread *thread)) JvmtiExport::post_method_exit(thread, InterpreterRuntime::method(thread), InterpreterRuntime::last_frame(thread)); IRT_END IRT_LEAF(int, InterpreterRuntime::interpreter_contains(address pc)) { return (Interpreter::contains(pc) ? 1 : 0); } IRT_END // Implementation of SignatureHandlerLibrary #ifndef SHARING_FAST_NATIVE_FINGERPRINTS // Dummy definition (else normalization method is defined in CPU // dependant code) uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) { return fingerprint; } #endif address SignatureHandlerLibrary::set_handler_blob() { BufferBlob* handler_blob = BufferBlob::create("native signature handlers", blob_size); if (handler_blob == NULL) { return NULL; } address handler = handler_blob->code_begin(); _handler_blob = handler_blob; _handler = handler; return handler; } void SignatureHandlerLibrary::initialize() { if (_fingerprints != NULL) { return; } if (set_handler_blob() == NULL) { vm_exit_out_of_memory(blob_size, OOM_MALLOC_ERROR, "native signature handlers"); } BufferBlob* bb = BufferBlob::create("Signature Handler Temp Buffer", SignatureHandlerLibrary::buffer_size); _buffer = bb->code_begin(); _fingerprints = new(ResourceObj::C_HEAP, mtCode)GrowableArray(32, true); _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray
(32, true); } address SignatureHandlerLibrary::set_handler(CodeBuffer* buffer) { address handler = _handler; int insts_size = buffer->pure_insts_size(); if (handler + insts_size > _handler_blob->code_end()) { // get a new handler blob handler = set_handler_blob(); } if (handler != NULL) { memcpy(handler, buffer->insts_begin(), insts_size); pd_set_handler(handler); ICache::invalidate_range(handler, insts_size); _handler = handler + insts_size; } CodeCacheExtensions::handle_generated_handler(handler, buffer->name(), _handler); return handler; } void SignatureHandlerLibrary::add(const methodHandle& method) { if (method->signature_handler() == NULL) { // use slow signature handler if we can't do better int handler_index = -1; // check if we can use customized (fast) signature handler if (UseFastSignatureHandlers && CodeCacheExtensions::support_fast_signature_handlers() && method->size_of_parameters() <= Fingerprinter::max_size_of_parameters) { // use customized signature handler MutexLocker mu(SignatureHandlerLibrary_lock); // make sure data structure is initialized initialize(); // lookup method signature's fingerprint uint64_t fingerprint = Fingerprinter(method).fingerprint(); // allow CPU dependant code to optimize the fingerprints for the fast handler fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); handler_index = _fingerprints->find(fingerprint); // create handler if necessary if (handler_index < 0) { ResourceMark rm; ptrdiff_t align_offset = (address) round_to((intptr_t)_buffer, CodeEntryAlignment) - (address)_buffer; CodeBuffer buffer((address)(_buffer + align_offset), SignatureHandlerLibrary::buffer_size - align_offset); if (!CodeCacheExtensions::support_dynamic_code()) { // we need a name for the signature (for lookups or saving) const int SYMBOL_SIZE = 50; char *symbolName = NEW_RESOURCE_ARRAY(char, SYMBOL_SIZE); // support for named signatures jio_snprintf(symbolName, SYMBOL_SIZE, "native_" UINT64_FORMAT, fingerprint); buffer.set_name(symbolName); } InterpreterRuntime::SignatureHandlerGenerator(method, &buffer).generate(fingerprint); // copy into code heap address handler = set_handler(&buffer); if (handler == NULL) { // use slow signature handler (without memorizing it in the fingerprints) } else { // debugging suppport if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { ttyLocker ttyl; tty->cr(); tty->print_cr("argument handler #%d for: %s %s (fingerprint = " UINT64_FORMAT ", %d bytes generated)", _handlers->length(), (method->is_static() ? "static" : "receiver"), method->name_and_sig_as_C_string(), fingerprint, buffer.insts_size()); if (buffer.insts_size() > 0) { // buffer may be empty for pregenerated handlers Disassembler::decode(handler, handler + buffer.insts_size()); } #ifndef PRODUCT address rh_begin = Interpreter::result_handler(method()->result_type()); if (CodeCache::contains(rh_begin)) { // else it might be special platform dependent values tty->print_cr(" --- associated result handler ---"); address rh_end = rh_begin; while (*(int*)rh_end != 0) { rh_end += sizeof(int); } Disassembler::decode(rh_begin, rh_end); } else { tty->print_cr(" associated result handler: " PTR_FORMAT, p2i(rh_begin)); } #endif } // add handler to library _fingerprints->append(fingerprint); _handlers->append(handler); // set handler index assert(_fingerprints->length() == _handlers->length(), "sanity check"); handler_index = _fingerprints->length() - 1; } } // Set handler under SignatureHandlerLibrary_lock if (handler_index < 0) { // use generic signature handler method->set_signature_handler(Interpreter::slow_signature_handler()); } else { // set handler method->set_signature_handler(_handlers->at(handler_index)); } } else { CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); // use generic signature handler method->set_signature_handler(Interpreter::slow_signature_handler()); } } #ifdef ASSERT int handler_index = -1; int fingerprint_index = -2; { // '_handlers' and '_fingerprints' are 'GrowableArray's and are NOT synchronized // in any way if accessed from multiple threads. To avoid races with another // thread which may change the arrays in the above, mutex protected block, we // have to protect this read access here with the same mutex as well! MutexLocker mu(SignatureHandlerLibrary_lock); if (_handlers != NULL) { handler_index = _handlers->find(method->signature_handler()); uint64_t fingerprint = Fingerprinter(method).fingerprint(); fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); fingerprint_index = _fingerprints->find(fingerprint); } } assert(method->signature_handler() == Interpreter::slow_signature_handler() || handler_index == fingerprint_index, "sanity check"); #endif // ASSERT } void SignatureHandlerLibrary::add(uint64_t fingerprint, address handler) { int handler_index = -1; // use customized signature handler MutexLocker mu(SignatureHandlerLibrary_lock); // make sure data structure is initialized initialize(); fingerprint = InterpreterRuntime::normalize_fast_native_fingerprint(fingerprint); handler_index = _fingerprints->find(fingerprint); // create handler if necessary if (handler_index < 0) { if (PrintSignatureHandlers && (handler != Interpreter::slow_signature_handler())) { tty->cr(); tty->print_cr("argument handler #%d at " PTR_FORMAT " for fingerprint " UINT64_FORMAT, _handlers->length(), p2i(handler), fingerprint); } _fingerprints->append(fingerprint); _handlers->append(handler); } else { if (PrintSignatureHandlers) { tty->cr(); tty->print_cr("duplicate argument handler #%d for fingerprint " UINT64_FORMAT "(old: " PTR_FORMAT ", new : " PTR_FORMAT ")", _handlers->length(), fingerprint, p2i(_handlers->at(handler_index)), p2i(handler)); } } } BufferBlob* SignatureHandlerLibrary::_handler_blob = NULL; address SignatureHandlerLibrary::_handler = NULL; GrowableArray* SignatureHandlerLibrary::_fingerprints = NULL; GrowableArray
* SignatureHandlerLibrary::_handlers = NULL; address SignatureHandlerLibrary::_buffer = NULL; IRT_ENTRY(void, InterpreterRuntime::prepare_native_call(JavaThread* thread, Method* method)) methodHandle m(thread, method); assert(m->is_native(), "sanity check"); // lookup native function entry point if it doesn't exist bool in_base_library; if (!m->has_native_function()) { NativeLookup::lookup(m, in_base_library, CHECK); } // make sure signature handler is installed SignatureHandlerLibrary::add(m); // The interpreter entry point checks the signature handler first, // before trying to fetch the native entry point and klass mirror. // We must set the signature handler last, so that multiple processors // preparing the same method will be sure to see non-null entry & mirror. IRT_END #if defined(IA32) || defined(AMD64) || defined(ARM) IRT_LEAF(void, InterpreterRuntime::popframe_move_outgoing_args(JavaThread* thread, void* src_address, void* dest_address)) if (src_address == dest_address) { return; } ResetNoHandleMark rnm; // In a LEAF entry. HandleMark hm; ResourceMark rm; frame fr = thread->last_frame(); assert(fr.is_interpreted_frame(), ""); jint bci = fr.interpreter_frame_bci(); methodHandle mh(thread, fr.interpreter_frame_method()); Bytecode_invoke invoke(mh, bci); ArgumentSizeComputer asc(invoke.signature()); int size_of_arguments = (asc.size() + (invoke.has_receiver() ? 1 : 0)); // receiver Copy::conjoint_jbytes(src_address, dest_address, size_of_arguments * Interpreter::stackElementSize); IRT_END #endif #if INCLUDE_JVMTI // This is a support of the JVMTI PopFrame interface. // Make sure it is an invokestatic of a polymorphic intrinsic that has a member_name argument // and return it as a vm_result so that it can be reloaded in the list of invokestatic parameters. // The member_name argument is a saved reference (in local#0) to the member_name. // For backward compatibility with some JDK versions (7, 8) it can also be a direct method handle. // FIXME: remove DMH case after j.l.i.InvokerBytecodeGenerator code shape is updated. IRT_ENTRY(void, InterpreterRuntime::member_name_arg_or_null(JavaThread* thread, address member_name, Method* method, address bcp)) Bytecodes::Code code = Bytecodes::code_at(method, bcp); if (code != Bytecodes::_invokestatic) { return; } ConstantPool* cpool = method->constants(); int cp_index = Bytes::get_native_u2(bcp + 1) + ConstantPool::CPCACHE_INDEX_TAG; Symbol* cname = cpool->klass_name_at(cpool->klass_ref_index_at(cp_index)); Symbol* mname = cpool->name_ref_at(cp_index); if (MethodHandles::has_member_arg(cname, mname)) { oop member_name_oop = (oop) member_name; if (java_lang_invoke_DirectMethodHandle::is_instance(member_name_oop)) { // FIXME: remove after j.l.i.InvokerBytecodeGenerator code shape is updated. member_name_oop = java_lang_invoke_DirectMethodHandle::member(member_name_oop); } thread->set_vm_result(member_name_oop); } else { thread->set_vm_result(NULL); } IRT_END #endif // INCLUDE_JVMTI