--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/interpreter/interpreterRuntime.cpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,1430 @@
+/*
+ * 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