| /* |
| * Copyright (c) 1997, 2017, 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 "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/resourceArea.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 "prims/jvmtiExport.hpp" |
| #include "prims/nativeLookup.hpp" |
| #include "runtime/atomic.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/align.hpp" |
| #include "utilities/events.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 = pool->klass_at(index, CHECK); |
| InstanceKlass* klass = InstanceKlass::cast(k); |
| |
| // 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 |
| |
| |
| 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)) |
| 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::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(oopDesc::is_oop(obj), "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, |
| const 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(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()); |
| |
| 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"); |
| // 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 |
| Klass* klass = h_exception->klass(); |
| handler_bci = Method::fast_exception_handler_bci_for(h_method, 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 |
| #if COMPILER2_OR_JVMCI |
| // Count this for compilation purposes |
| h_method->interpreter_throwout_increment(THREAD); |
| #endif |
| } 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()); |
| methodHandle m(thread, method(thread)); |
| 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), |
| m, 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()); |
| |
| // Resolution of put instructions on final fields is delayed. That is required so that |
| // exceptions are thrown at the correct place (when the instruction is actually invoked). |
| // If we do not resolve an instruction in the current pass, leaving the put_code |
| // set to zero will cause the next put instruction to the same field to reresolve. |
| |
| // Resolution of put instructions to final instance fields with invalid updates (i.e., |
| // to final instance fields with updates originating from a method different than <init>) |
| // is inhibited. A putfield instruction targeting an instance final field must throw |
| // an IllegalAccessError if the instruction is not in an instance |
| // initializer method <init>. If resolution were not inhibited, a putfield |
| // in an initializer method could be resolved in the initializer. Subsequent |
| // putfield instructions to the same field would then use cached information. |
| // As a result, those instructions would not pass through the VM. That is, |
| // checks in resolve_field_access() would not be executed for those instructions |
| // and the required IllegalAccessError would not be thrown. |
| // |
| // Also, we need to delay resolving getstatic and putstatic instructions until the |
| // class is initialized. 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 = is_static && !klass->is_initialized(); |
| bool has_initialized_final_update = info.field_holder()->major_version() >= 53 && |
| info.has_initialized_final_update(); |
| assert(!(has_initialized_final_update && !info.access_flags().is_final()), "Fields with initialized final updates must be final"); |
| |
| Bytecodes::Code get_code = (Bytecodes::Code)0; |
| Bytecodes::Code put_code = (Bytecodes::Code)0; |
| if (!uninitialized_static) { |
| get_code = ((is_static) ? Bytecodes::_getstatic : Bytecodes::_getfield); |
| if ((is_put && !has_initialized_final_update) || !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::_invokespecial) { |
| 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 |
| |
| // 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 if (bytecode == Bytecodes::_invokespecial) { |
| assert(info.call_kind() == CallInfo::direct_call, "must be direct call"); |
| } else { |
| assert(info.call_kind() == CallInfo::direct_call || |
| info.call_kind() == CallInfo::vtable_call, ""); |
| } |
| #endif |
| // Get sender or sender's host_klass, and only set cpCache entry to resolved if |
| // it is not an interface. The receiver for invokespecial calls within interface |
| // methods must be checked for every call. |
| InstanceKlass* sender = pool->pool_holder(); |
| sender = sender->is_anonymous() ? sender->host_klass() : sender; |
| |
| switch (info.call_kind()) { |
| case CallInfo::direct_call: |
| cp_cache_entry->set_direct_call( |
| bytecode, |
| info.resolved_method(), |
| sender->is_interface()); |
| 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: |
| resolve_get_put(thread, bytecode); |
| break; |
| case Bytecodes::_invokevirtual: |
| 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<Handle>* objects_to_revoke = new GrowableArray<Handle>(); |
| 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())); |
| guarantee(data != NULL, "profile data must be valid"); |
| 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); |
| } |
| InstanceKlass* cp_entry_f1 = InstanceKlass::cast(cp_entry->f1_as_klass()); |
| jfieldID fid = jfieldIDWorkaround::to_jfieldID(cp_entry_f1, cp_entry->f2_as_index(), is_static); |
| JvmtiExport::post_field_access(thread, method(thread), bcp(thread), 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 = 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 = 'B'; break; |
| case ztos: 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); |
| jfieldID fid = jfieldIDWorkaround::to_jfieldID(ik, 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), ik, 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<uint64_t>(32, true); |
| _handlers = new(ResourceObj::C_HEAP, mtCode)GrowableArray<address>(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; |
| } |
| 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 && 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 = align_up(_buffer, CodeEntryAlignment) - (address)_buffer; |
| CodeBuffer buffer((address)(_buffer + align_offset), |
| SignatureHandlerLibrary::buffer_size - align_offset); |
| 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) { |
| 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<uint64_t>* SignatureHandlerLibrary::_fingerprints = NULL; |
| GrowableArray<address>* 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 |
| |
| #ifndef PRODUCT |
| // This must be a IRT_LEAF function because the interpreter must save registers on x86 to |
| // call this, which changes rsp and makes the interpreter's expression stack not walkable. |
| // The generated code still uses call_VM because that will set up the frame pointer for |
| // bcp and method. |
| IRT_LEAF(intptr_t, InterpreterRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) |
| const frame f = thread->last_frame(); |
| assert(f.is_interpreted_frame(), "must be an interpreted frame"); |
| methodHandle mh(thread, f.interpreter_frame_method()); |
| BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); |
| return preserve_this_value; |
| IRT_END |
| #endif // !PRODUCT |