never@1445: /*
never@1445:  * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.
kvn@1691:  * Copyright 2007, 2008, 2009, 2010 Red Hat, Inc.
never@1445:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@1445:  *
never@1445:  * This code is free software; you can redistribute it and/or modify it
never@1445:  * under the terms of the GNU General Public License version 2 only, as
never@1445:  * published by the Free Software Foundation.
never@1445:  *
never@1445:  * This code is distributed in the hope that it will be useful, but WITHOUT
never@1445:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@1445:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
never@1445:  * version 2 for more details (a copy is included in the LICENSE file that
never@1445:  * accompanied this code).
never@1445:  *
never@1445:  * You should have received a copy of the GNU General Public License version
never@1445:  * 2 along with this work; if not, write to the Free Software Foundation,
never@1445:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@1445:  *
never@1445:  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
never@1445:  * CA 95054 USA or visit www.sun.com if you need additional information or
never@1445:  * have any questions.
never@1445:  *
never@1445:  */
never@1445: 
never@1445: #include "incls/_precompiled.incl"
never@1445: #include "incls/_cppInterpreter_zero.cpp.incl"
never@1445: 
never@1445: #ifdef CC_INTERP
never@1445: 
never@1445: #define fixup_after_potential_safepoint()       \
never@1445:   method = istate->method()
never@1445: 
never@1445: #define CALL_VM_NOCHECK(func)                   \
never@1445:   thread->set_last_Java_frame();                \
never@1445:   func;                                         \
never@1445:   thread->reset_last_Java_frame();              \
never@1445:   fixup_after_potential_safepoint()
never@1445: 
never@1445: void CppInterpreter::normal_entry(methodOop method, intptr_t UNUSED, TRAPS) {
never@1445:   JavaThread *thread = (JavaThread *) THREAD;
never@1445:   ZeroStack *stack = thread->zero_stack();
never@1445: 
never@1445:   // Adjust the caller's stack frame to accomodate any additional
never@1445:   // local variables we have contiguously with our parameters.
never@1445:   int extra_locals = method->max_locals() - method->size_of_parameters();
never@1445:   if (extra_locals > 0) {
never@1445:     if (extra_locals > stack->available_words()) {
never@1445:       Unimplemented();
never@1445:     }
never@1445:     for (int i = 0; i < extra_locals; i++)
never@1445:       stack->push(0);
never@1445:   }
never@1445: 
never@1445:   // Allocate and initialize our frame.
never@1445:   InterpreterFrame *frame = InterpreterFrame::build(stack, method, thread);
never@1445:   thread->push_zero_frame(frame);
never@1445: 
never@1445:   // Execute those bytecodes!
never@1445:   main_loop(0, THREAD);
never@1445: }
never@1445: 
never@1445: void CppInterpreter::main_loop(int recurse, TRAPS) {
never@1445:   JavaThread *thread = (JavaThread *) THREAD;
never@1445:   ZeroStack *stack = thread->zero_stack();
never@1445: 
never@1445:   // If we are entering from a deopt we may need to call
never@1445:   // ourself a few times in order to get to our frame.
never@1445:   if (recurse)
never@1445:     main_loop(recurse - 1, THREAD);
never@1445: 
never@1445:   InterpreterFrame *frame = thread->top_zero_frame()->as_interpreter_frame();
never@1445:   interpreterState istate = frame->interpreter_state();
never@1445:   methodOop method = istate->method();
never@1445: 
never@1445:   intptr_t *result = NULL;
never@1445:   int result_slots = 0;
never@1445: 
never@1445:   // Check we're not about to run out of stack
never@1445:   if (stack_overflow_imminent(thread)) {
never@1445:     CALL_VM_NOCHECK(InterpreterRuntime::throw_StackOverflowError(thread));
never@1445:     goto unwind_and_return;
never@1445:   }
never@1445: 
never@1445:   while (true) {
never@1445:     // We can set up the frame anchor with everything we want at
never@1445:     // this point as we are thread_in_Java and no safepoints can
never@1445:     // occur until we go to vm mode.  We do have to clear flags
never@1445:     // on return from vm but that is it.
never@1445:     thread->set_last_Java_frame();
never@1445: 
never@1445:     // Call the interpreter
never@1445:     if (JvmtiExport::can_post_interpreter_events())
never@1445:       BytecodeInterpreter::runWithChecks(istate);
never@1445:     else
never@1445:       BytecodeInterpreter::run(istate);
never@1445:     fixup_after_potential_safepoint();
never@1445: 
never@1445:     // Clear the frame anchor
never@1445:     thread->reset_last_Java_frame();
never@1445: 
never@1445:     // Examine the message from the interpreter to decide what to do
never@1445:     if (istate->msg() == BytecodeInterpreter::call_method) {
never@1445:       methodOop callee = istate->callee();
never@1445: 
never@1445:       // Trim back the stack to put the parameters at the top
never@1445:       stack->set_sp(istate->stack() + 1);
never@1445: 
never@1445:       // Make the call
never@1445:       Interpreter::invoke_method(callee, istate->callee_entry_point(), THREAD);
never@1445:       fixup_after_potential_safepoint();
never@1445: 
never@1445:       // Convert the result
never@1445:       istate->set_stack(stack->sp() - 1);
never@1445: 
never@1445:       // Restore the stack
never@1445:       stack->set_sp(istate->stack_limit() + 1);
never@1445: 
never@1445:       // Resume the interpreter
never@1445:       istate->set_msg(BytecodeInterpreter::method_resume);
never@1445:     }
never@1445:     else if (istate->msg() == BytecodeInterpreter::more_monitors) {
never@1445:       int monitor_words = frame::interpreter_frame_monitor_size();
never@1445: 
never@1445:       // Allocate the space
never@1445:       if (monitor_words > stack->available_words()) {
never@1445:         Unimplemented();
never@1445:       }
never@1445:       stack->alloc(monitor_words * wordSize);
never@1445: 
never@1445:       // Move the expression stack contents
never@1445:       for (intptr_t *p = istate->stack() + 1; p < istate->stack_base(); p++)
never@1445:         *(p - monitor_words) = *p;
never@1445: 
never@1445:       // Move the expression stack pointers
never@1445:       istate->set_stack_limit(istate->stack_limit() - monitor_words);
never@1445:       istate->set_stack(istate->stack() - monitor_words);
never@1445:       istate->set_stack_base(istate->stack_base() - monitor_words);
never@1445: 
never@1445:       // Zero the new monitor so the interpreter can find it.
never@1445:       ((BasicObjectLock *) istate->stack_base())->set_obj(NULL);
never@1445: 
never@1445:       // Resume the interpreter
never@1445:       istate->set_msg(BytecodeInterpreter::got_monitors);
never@1445:     }
never@1445:     else if (istate->msg() == BytecodeInterpreter::return_from_method) {
never@1445:       // Copy the result into the caller's frame
kvn@1691:       result_slots = type2size[result_type_of(method)];
never@1445:       assert(result_slots >= 0 && result_slots <= 2, "what?");
never@1445:       result = istate->stack() + result_slots;
never@1445:       break;
never@1445:     }
never@1445:     else if (istate->msg() == BytecodeInterpreter::throwing_exception) {
never@1445:       assert(HAS_PENDING_EXCEPTION, "should do");
never@1445:       break;
never@1445:     }
never@1445:     else if (istate->msg() == BytecodeInterpreter::do_osr) {
never@1445:       // Unwind the current frame
never@1445:       thread->pop_zero_frame();
never@1445: 
never@1445:       // Remove any extension of the previous frame
never@1445:       int extra_locals = method->max_locals() - method->size_of_parameters();
never@1445:       stack->set_sp(stack->sp() + extra_locals);
never@1445: 
never@1445:       // Jump into the OSR method
never@1445:       Interpreter::invoke_osr(
never@1445:         method, istate->osr_entry(), istate->osr_buf(), THREAD);
never@1445:       return;
never@1445:     }
never@1445:     else {
never@1445:       ShouldNotReachHere();
never@1445:     }
never@1445:   }
never@1445: 
never@1445:  unwind_and_return:
never@1445: 
never@1445:   // Unwind the current frame
never@1445:   thread->pop_zero_frame();
never@1445: 
never@1445:   // Pop our local variables
never@1445:   stack->set_sp(stack->sp() + method->max_locals());
never@1445: 
never@1445:   // Push our result
never@1445:   for (int i = 0; i < result_slots; i++)
never@1445:     stack->push(result[-i]);
never@1445: }
never@1445: 
never@1445: void CppInterpreter::native_entry(methodOop method, intptr_t UNUSED, TRAPS) {
never@1445:   // Make sure method is native and not abstract
never@1445:   assert(method->is_native() && !method->is_abstract(), "should be");
never@1445: 
never@1445:   JavaThread *thread = (JavaThread *) THREAD;
never@1445:   ZeroStack *stack = thread->zero_stack();
never@1445: 
never@1445:   // Allocate and initialize our frame
never@1445:   InterpreterFrame *frame = InterpreterFrame::build(stack, method, thread);
never@1445:   thread->push_zero_frame(frame);
never@1445:   interpreterState istate = frame->interpreter_state();
never@1445:   intptr_t *locals = istate->locals();
never@1445: 
never@1445:   // Check we're not about to run out of stack
never@1445:   if (stack_overflow_imminent(thread)) {
never@1445:     CALL_VM_NOCHECK(InterpreterRuntime::throw_StackOverflowError(thread));
never@1445:     goto unwind_and_return;
never@1445:   }
never@1445: 
twisti@1513:   // Update the invocation counter
twisti@1513:   if ((UseCompiler || CountCompiledCalls) && !method->is_synchronized()) {
twisti@1513:     InvocationCounter *counter = method->invocation_counter();
twisti@1513:     counter->increment();
twisti@1513:     if (counter->reached_InvocationLimit()) {
twisti@1513:       CALL_VM_NOCHECK(
twisti@1513:         InterpreterRuntime::frequency_counter_overflow(thread, NULL));
twisti@1513:       if (HAS_PENDING_EXCEPTION)
twisti@1513:         goto unwind_and_return;
twisti@1513:     }
twisti@1513:   }
twisti@1513: 
never@1445:   // Lock if necessary
never@1445:   BasicObjectLock *monitor;
never@1445:   monitor = NULL;
never@1445:   if (method->is_synchronized()) {
never@1445:     monitor = (BasicObjectLock*) istate->stack_base();
never@1445:     oop lockee = monitor->obj();
never@1445:     markOop disp = lockee->mark()->set_unlocked();
never@1445: 
never@1445:     monitor->lock()->set_displaced_header(disp);
never@1445:     if (Atomic::cmpxchg_ptr(monitor, lockee->mark_addr(), disp) != disp) {
never@1445:       if (thread->is_lock_owned((address) disp->clear_lock_bits())) {
never@1445:         monitor->lock()->set_displaced_header(NULL);
never@1445:       }
never@1445:       else {
never@1445:         CALL_VM_NOCHECK(InterpreterRuntime::monitorenter(thread, monitor));
never@1445:         if (HAS_PENDING_EXCEPTION)
never@1445:           goto unwind_and_return;
never@1445:       }
never@1445:     }
never@1445:   }
never@1445: 
never@1445:   // Get the signature handler
never@1445:   InterpreterRuntime::SignatureHandler *handler; {
never@1445:     address handlerAddr = method->signature_handler();
never@1445:     if (handlerAddr == NULL) {
never@1445:       CALL_VM_NOCHECK(InterpreterRuntime::prepare_native_call(thread, method));
never@1445:       if (HAS_PENDING_EXCEPTION)
never@1574:         goto unlock_unwind_and_return;
never@1445: 
never@1445:       handlerAddr = method->signature_handler();
never@1445:       assert(handlerAddr != NULL, "eh?");
never@1445:     }
never@1445:     if (handlerAddr == (address) InterpreterRuntime::slow_signature_handler) {
never@1445:       CALL_VM_NOCHECK(handlerAddr =
never@1445:         InterpreterRuntime::slow_signature_handler(thread, method, NULL,NULL));
never@1445:       if (HAS_PENDING_EXCEPTION)
never@1574:         goto unlock_unwind_and_return;
never@1445:     }
never@1445:     handler = \
never@1445:       InterpreterRuntime::SignatureHandler::from_handlerAddr(handlerAddr);
never@1445:   }
never@1445: 
never@1445:   // Get the native function entry point
never@1445:   address function;
never@1445:   function = method->native_function();
never@1445:   assert(function != NULL, "should be set if signature handler is");
never@1445: 
never@1445:   // Build the argument list
never@1445:   if (handler->argument_count() * 2 > stack->available_words()) {
never@1445:     Unimplemented();
never@1445:   }
never@1445:   void **arguments;
never@1445:   void *mirror; {
never@1445:     arguments =
never@1445:       (void **) stack->alloc(handler->argument_count() * sizeof(void **));
never@1445:     void **dst = arguments;
never@1445: 
never@1445:     void *env = thread->jni_environment();
never@1445:     *(dst++) = &env;
never@1445: 
never@1445:     if (method->is_static()) {
never@1445:       istate->set_oop_temp(
never@1445:         method->constants()->pool_holder()->klass_part()->java_mirror());
never@1445:       mirror = istate->oop_temp_addr();
never@1445:       *(dst++) = &mirror;
never@1445:     }
never@1445: 
never@1445:     intptr_t *src = locals;
never@1445:     for (int i = dst - arguments; i < handler->argument_count(); i++) {
never@1445:       ffi_type *type = handler->argument_type(i);
never@1445:       if (type == &ffi_type_pointer) {
never@1445:         if (*src) {
never@1445:           stack->push((intptr_t) src);
never@1445:           *(dst++) = stack->sp();
never@1445:         }
never@1445:         else {
never@1445:           *(dst++) = src;
never@1445:         }
never@1445:         src--;
never@1445:       }
never@1445:       else if (type->size == 4) {
never@1445:         *(dst++) = src--;
never@1445:       }
never@1445:       else if (type->size == 8) {
never@1445:         src--;
never@1445:         *(dst++) = src--;
never@1445:       }
never@1445:       else {
never@1445:         ShouldNotReachHere();
never@1445:       }
never@1445:     }
never@1445:   }
never@1445: 
never@1445:   // Set up the Java frame anchor
never@1445:   thread->set_last_Java_frame();
never@1445: 
never@1445:   // Change the thread state to _thread_in_native
never@1445:   ThreadStateTransition::transition_from_java(thread, _thread_in_native);
never@1445: 
never@1445:   // Make the call
never@1445:   intptr_t result[4 - LogBytesPerWord];
never@1445:   ffi_call(handler->cif(), (void (*)()) function, result, arguments);
never@1445: 
never@1445:   // Change the thread state back to _thread_in_Java.
never@1445:   // ThreadStateTransition::transition_from_native() cannot be used
never@1445:   // here because it does not check for asynchronous exceptions.
never@1445:   // We have to manage the transition ourself.
never@1445:   thread->set_thread_state(_thread_in_native_trans);
never@1445: 
never@1445:   // Make sure new state is visible in the GC thread
never@1445:   if (os::is_MP()) {
never@1445:     if (UseMembar) {
never@1445:       OrderAccess::fence();
never@1445:     }
never@1445:     else {
never@1445:       InterfaceSupport::serialize_memory(thread);
never@1445:     }
never@1445:   }
never@1445: 
never@1445:   // Handle safepoint operations, pending suspend requests,
never@1445:   // and pending asynchronous exceptions.
never@1445:   if (SafepointSynchronize::do_call_back() ||
never@1445:       thread->has_special_condition_for_native_trans()) {
never@1445:     JavaThread::check_special_condition_for_native_trans(thread);
never@1445:     CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops());
never@1445:   }
never@1445: 
never@1445:   // Finally we can change the thread state to _thread_in_Java.
never@1445:   thread->set_thread_state(_thread_in_Java);
never@1445:   fixup_after_potential_safepoint();
never@1445: 
never@1445:   // Clear the frame anchor
never@1445:   thread->reset_last_Java_frame();
never@1445: 
never@1445:   // If the result was an oop then unbox it and store it in
never@1445:   // oop_temp where the garbage collector can see it before
never@1445:   // we release the handle it might be protected by.
never@1445:   if (handler->result_type() == &ffi_type_pointer) {
never@1445:     if (result[0])
never@1445:       istate->set_oop_temp(*(oop *) result[0]);
never@1445:     else
never@1445:       istate->set_oop_temp(NULL);
never@1445:   }
never@1445: 
never@1445:   // Reset handle block
never@1445:   thread->active_handles()->clear();
never@1445: 
never@1574:  unlock_unwind_and_return:
never@1574: 
never@1574:   // Unlock if necessary
never@1574:   if (monitor) {
never@1445:     BasicLock *lock = monitor->lock();
never@1445:     markOop header = lock->displaced_header();
never@1445:     oop rcvr = monitor->obj();
never@1445:     monitor->set_obj(NULL);
never@1445: 
never@1445:     if (header != NULL) {
never@1445:       if (Atomic::cmpxchg_ptr(header, rcvr->mark_addr(), lock) != lock) {
never@1445:         monitor->set_obj(rcvr); {
never@1445:           HandleMark hm(thread);
never@1445:           CALL_VM_NOCHECK(InterpreterRuntime::monitorexit(thread, monitor));
never@1445:         }
never@1445:       }
never@1445:     }
never@1445:   }
never@1445: 
never@1445:  unwind_and_return:
never@1445: 
never@1445:   // Unwind the current activation
never@1445:   thread->pop_zero_frame();
never@1445: 
never@1445:   // Pop our parameters
never@1445:   stack->set_sp(stack->sp() + method->size_of_parameters());
never@1445: 
never@1445:   // Push our result
never@1445:   if (!HAS_PENDING_EXCEPTION) {
kvn@1691:     BasicType type = result_type_of(method);
kvn@1691:     stack->set_sp(stack->sp() - type2size[type]);
never@1445: 
kvn@1691:     switch (type) {
never@1445:     case T_VOID:
never@1445:       break;
never@1445: 
never@1445:     case T_BOOLEAN:
never@1445: #ifndef VM_LITTLE_ENDIAN
never@1445:       result[0] <<= (BitsPerWord - BitsPerByte);
never@1445: #endif
never@1445:       SET_LOCALS_INT(*(jboolean *) result != 0, 0);
never@1445:       break;
never@1445: 
never@1445:     case T_CHAR:
never@1445: #ifndef VM_LITTLE_ENDIAN
never@1445:       result[0] <<= (BitsPerWord - BitsPerShort);
never@1445: #endif
never@1445:       SET_LOCALS_INT(*(jchar *) result, 0);
never@1445:       break;
never@1445: 
never@1445:     case T_BYTE:
never@1445: #ifndef VM_LITTLE_ENDIAN
never@1445:       result[0] <<= (BitsPerWord - BitsPerByte);
never@1445: #endif
never@1445:       SET_LOCALS_INT(*(jbyte *) result, 0);
never@1445:       break;
never@1445: 
never@1445:     case T_SHORT:
never@1445: #ifndef VM_LITTLE_ENDIAN
never@1445:       result[0] <<= (BitsPerWord - BitsPerShort);
never@1445: #endif
never@1445:       SET_LOCALS_INT(*(jshort *) result, 0);
never@1445:       break;
never@1445: 
never@1445:     case T_INT:
never@1445: #ifndef VM_LITTLE_ENDIAN
never@1445:       result[0] <<= (BitsPerWord - BitsPerInt);
never@1445: #endif
never@1445:       SET_LOCALS_INT(*(jint *) result, 0);
never@1445:       break;
never@1445: 
never@1445:     case T_LONG:
never@1445:       SET_LOCALS_LONG(*(jlong *) result, 0);
never@1445:       break;
never@1445: 
never@1445:     case T_FLOAT:
never@1445:       SET_LOCALS_FLOAT(*(jfloat *) result, 0);
never@1445:       break;
never@1445: 
never@1445:     case T_DOUBLE:
never@1445:       SET_LOCALS_DOUBLE(*(jdouble *) result, 0);
never@1445:       break;
never@1445: 
never@1445:     case T_OBJECT:
never@1445:     case T_ARRAY:
never@1445:       SET_LOCALS_OBJECT(istate->oop_temp(), 0);
never@1445:       break;
never@1445: 
never@1445:     default:
never@1445:       ShouldNotReachHere();
never@1445:     }
never@1445:   }
never@1445: }
never@1445: 
never@1445: void CppInterpreter::accessor_entry(methodOop method, intptr_t UNUSED, TRAPS) {
never@1445:   JavaThread *thread = (JavaThread *) THREAD;
never@1445:   ZeroStack *stack = thread->zero_stack();
never@1445:   intptr_t *locals = stack->sp();
never@1445: 
never@1445:   // Drop into the slow path if we need a safepoint check
never@1445:   if (SafepointSynchronize::do_call_back()) {
never@1445:     normal_entry(method, 0, THREAD);
never@1445:     return;
never@1445:   }
never@1445: 
never@1445:   // Load the object pointer and drop into the slow path
never@1445:   // if we have a NullPointerException
never@1445:   oop object = LOCALS_OBJECT(0);
never@1445:   if (object == NULL) {
never@1445:     normal_entry(method, 0, THREAD);
never@1445:     return;
never@1445:   }
never@1445: 
never@1445:   // Read the field index from the bytecode, which looks like this:
never@1445:   //  0:  aload_0
never@1445:   //  1:  getfield
never@1445:   //  2:    index
never@1445:   //  3:    index
never@1445:   //  4:  ireturn/areturn
never@1445:   // NB this is not raw bytecode: index is in machine order
never@1445:   u1 *code = method->code_base();
never@1445:   assert(code[0] == Bytecodes::_aload_0 &&
never@1445:          code[1] == Bytecodes::_getfield &&
never@1445:          (code[4] == Bytecodes::_ireturn ||
never@1445:           code[4] == Bytecodes::_areturn), "should do");
never@1445:   u2 index = Bytes::get_native_u2(&code[2]);
never@1445: 
never@1445:   // Get the entry from the constant pool cache, and drop into
never@1445:   // the slow path if it has not been resolved
never@1445:   constantPoolCacheOop cache = method->constants()->cache();
never@1445:   ConstantPoolCacheEntry* entry = cache->entry_at(index);
never@1445:   if (!entry->is_resolved(Bytecodes::_getfield)) {
never@1445:     normal_entry(method, 0, THREAD);
never@1445:     return;
never@1445:   }
never@1445: 
never@1445:   // Get the result and push it onto the stack
never@1445:   switch (entry->flag_state()) {
never@1445:   case ltos:
never@1445:   case dtos:
never@1445:     if (stack->available_words() < 1) {
never@1445:       Unimplemented();
never@1445:     }
never@1445:     stack->alloc(wordSize);
never@1445:     break;
never@1445:   }
never@1445:   if (entry->is_volatile()) {
never@1445:     switch (entry->flag_state()) {
never@1445:     case ctos:
never@1445:       SET_LOCALS_INT(object->char_field_acquire(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case btos:
never@1445:       SET_LOCALS_INT(object->byte_field_acquire(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case stos:
never@1445:       SET_LOCALS_INT(object->short_field_acquire(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case itos:
never@1445:       SET_LOCALS_INT(object->int_field_acquire(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case ltos:
never@1445:       SET_LOCALS_LONG(object->long_field_acquire(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case ftos:
never@1445:       SET_LOCALS_FLOAT(object->float_field_acquire(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case dtos:
never@1445:       SET_LOCALS_DOUBLE(object->double_field_acquire(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case atos:
never@1445:       SET_LOCALS_OBJECT(object->obj_field_acquire(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     default:
never@1445:       ShouldNotReachHere();
never@1445:     }
never@1445:   }
never@1445:   else {
never@1445:     switch (entry->flag_state()) {
never@1445:     case ctos:
never@1445:       SET_LOCALS_INT(object->char_field(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case btos:
never@1445:       SET_LOCALS_INT(object->byte_field(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case stos:
never@1445:       SET_LOCALS_INT(object->short_field(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case itos:
never@1445:       SET_LOCALS_INT(object->int_field(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case ltos:
never@1445:       SET_LOCALS_LONG(object->long_field(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case ftos:
never@1445:       SET_LOCALS_FLOAT(object->float_field(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case dtos:
never@1445:       SET_LOCALS_DOUBLE(object->double_field(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     case atos:
never@1445:       SET_LOCALS_OBJECT(object->obj_field(entry->f2()), 0);
never@1445:       break;
never@1445: 
never@1445:     default:
never@1445:       ShouldNotReachHere();
never@1445:     }
never@1445:   }
never@1445: }
never@1445: 
never@1445: void CppInterpreter::empty_entry(methodOop method, intptr_t UNUSED, TRAPS) {
never@1445:   JavaThread *thread = (JavaThread *) THREAD;
never@1445:   ZeroStack *stack = thread->zero_stack();
never@1445: 
never@1445:   // Drop into the slow path if we need a safepoint check
never@1445:   if (SafepointSynchronize::do_call_back()) {
never@1445:     normal_entry(method, 0, THREAD);
never@1445:     return;
never@1445:   }
never@1445: 
never@1445:   // Pop our parameters
never@1445:   stack->set_sp(stack->sp() + method->size_of_parameters());
never@1445: }
never@1445: 
never@1445: bool CppInterpreter::stack_overflow_imminent(JavaThread *thread) {
never@1445:   // How is the ABI stack?
never@1445:   address stack_top = thread->stack_base() - thread->stack_size();
never@1445:   int free_stack = os::current_stack_pointer() - stack_top;
never@1445:   if (free_stack < StackShadowPages * os::vm_page_size()) {
never@1445:     return true;
never@1445:   }
never@1445: 
never@1445:   // How is the Zero stack?
never@1445:   // Throwing a StackOverflowError involves a VM call, which means
never@1445:   // we need a frame on the stack.  We should be checking here to
never@1445:   // ensure that methods we call have enough room to install the
never@1445:   // largest possible frame, but that's more than twice the size
never@1445:   // of the entire Zero stack we get by default, so we just check
never@1445:   // we have *some* space instead...
never@1445:   free_stack = thread->zero_stack()->available_words() * wordSize;
never@1445:   if (free_stack < StackShadowPages * os::vm_page_size()) {
never@1445:     return true;
never@1445:   }
never@1445: 
never@1445:   return false;
never@1445: }
never@1445: 
never@1445: InterpreterFrame *InterpreterFrame::build(ZeroStack*       stack,
never@1445:                                           const methodOop  method,
never@1445:                                           JavaThread*      thread) {
never@1445:   int monitor_words =
never@1445:     method->is_synchronized() ? frame::interpreter_frame_monitor_size() : 0;
never@1445:   int stack_words = method->is_native() ? 0 : method->max_stack();
never@1445: 
never@1445:   if (header_words + monitor_words + stack_words > stack->available_words()) {
never@1445:     Unimplemented();
never@1445:   }
never@1445: 
never@1445:   intptr_t *locals;
never@1445:   if (method->is_native())
never@1445:     locals = stack->sp() + (method->size_of_parameters() - 1);
never@1445:   else
never@1445:     locals = stack->sp() + (method->max_locals() - 1);
never@1445: 
never@1445:   stack->push(0); // next_frame, filled in later
never@1445:   intptr_t *fp = stack->sp();
never@1445:   assert(fp - stack->sp() == next_frame_off, "should be");
never@1445: 
never@1445:   stack->push(INTERPRETER_FRAME);
never@1445:   assert(fp - stack->sp() == frame_type_off, "should be");
never@1445: 
never@1445:   interpreterState istate =
never@1445:     (interpreterState) stack->alloc(sizeof(BytecodeInterpreter));
never@1445:   assert(fp - stack->sp() == istate_off, "should be");
never@1445: 
never@1445:   istate->set_locals(locals);
never@1445:   istate->set_method(method);
never@1445:   istate->set_self_link(istate);
never@1445:   istate->set_prev_link(NULL);
never@1445:   istate->set_thread(thread);
never@1445:   istate->set_bcp(method->is_native() ? NULL : method->code_base());
never@1445:   istate->set_constants(method->constants()->cache());
never@1445:   istate->set_msg(BytecodeInterpreter::method_entry);
never@1445:   istate->set_oop_temp(NULL);
never@1445:   istate->set_mdx(NULL);
never@1445:   istate->set_callee(NULL);
never@1445: 
never@1445:   istate->set_monitor_base((BasicObjectLock *) stack->sp());
never@1445:   if (method->is_synchronized()) {
never@1445:     BasicObjectLock *monitor =
never@1445:       (BasicObjectLock *) stack->alloc(monitor_words * wordSize);
never@1445:     oop object;
never@1445:     if (method->is_static())
never@1445:       object = method->constants()->pool_holder()->klass_part()->java_mirror();
never@1445:     else
never@1445:       object = (oop) locals[0];
never@1445:     monitor->set_obj(object);
never@1445:   }
never@1445: 
never@1445:   istate->set_stack_base(stack->sp());
never@1445:   istate->set_stack(stack->sp() - 1);
never@1445:   if (stack_words)
never@1445:     stack->alloc(stack_words * wordSize);
never@1445:   istate->set_stack_limit(stack->sp() - 1);
never@1445: 
never@1445:   return (InterpreterFrame *) fp;
never@1445: }
never@1445: 
never@1445: int AbstractInterpreter::BasicType_as_index(BasicType type) {
never@1445:   int i = 0;
never@1445:   switch (type) {
never@1445:     case T_BOOLEAN: i = 0; break;
never@1445:     case T_CHAR   : i = 1; break;
never@1445:     case T_BYTE   : i = 2; break;
never@1445:     case T_SHORT  : i = 3; break;
never@1445:     case T_INT    : i = 4; break;
never@1445:     case T_LONG   : i = 5; break;
never@1445:     case T_VOID   : i = 6; break;
never@1445:     case T_FLOAT  : i = 7; break;
never@1445:     case T_DOUBLE : i = 8; break;
never@1445:     case T_OBJECT : i = 9; break;
never@1445:     case T_ARRAY  : i = 9; break;
never@1445:     default       : ShouldNotReachHere();
never@1445:   }
never@1445:   assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers,
never@1445:          "index out of bounds");
never@1445:   return i;
never@1445: }
never@1445: 
kvn@1691: BasicType CppInterpreter::result_type_of(methodOop method) {
kvn@1691:   BasicType t;
kvn@1691:   switch (method->result_index()) {
kvn@1691:     case 0 : t = T_BOOLEAN; break;
kvn@1691:     case 1 : t = T_CHAR;    break;
kvn@1691:     case 2 : t = T_BYTE;    break;
kvn@1691:     case 3 : t = T_SHORT;   break;
kvn@1691:     case 4 : t = T_INT;     break;
kvn@1691:     case 5 : t = T_LONG;    break;
kvn@1691:     case 6 : t = T_VOID;    break;
kvn@1691:     case 7 : t = T_FLOAT;   break;
kvn@1691:     case 8 : t = T_DOUBLE;  break;
kvn@1691:     case 9 : t = T_OBJECT;  break;
kvn@1691:     default: ShouldNotReachHere();
kvn@1691:   }
kvn@1691:   assert(AbstractInterpreter::BasicType_as_index(t) == method->result_index(),
kvn@1691:          "out of step with AbstractInterpreter::BasicType_as_index");
kvn@1691:   return t;
kvn@1691: }
kvn@1691: 
never@1445: address InterpreterGenerator::generate_empty_entry() {
never@1445:   if (!UseFastEmptyMethods)
never@1445:     return NULL;
never@1445: 
never@1445:   return generate_entry((address) CppInterpreter::empty_entry);
never@1445: }
never@1445: 
never@1445: address InterpreterGenerator::generate_accessor_entry() {
never@1445:   if (!UseFastAccessorMethods)
never@1445:     return NULL;
never@1445: 
never@1445:   return generate_entry((address) CppInterpreter::accessor_entry);
never@1445: }
never@1445: 
never@1445: address InterpreterGenerator::generate_native_entry(bool synchronized) {
never@1445:   assert(synchronized == false, "should be");
never@1445: 
never@1445:   return generate_entry((address) CppInterpreter::native_entry);
never@1445: }
never@1445: 
never@1445: address InterpreterGenerator::generate_normal_entry(bool synchronized) {
never@1445:   assert(synchronized == false, "should be");
never@1445: 
never@1445:   return generate_entry((address) CppInterpreter::normal_entry);
never@1445: }
never@1445: 
never@1445: address AbstractInterpreterGenerator::generate_method_entry(
never@1445:     AbstractInterpreter::MethodKind kind) {
never@1445:   address entry_point = NULL;
never@1445: 
never@1445:   switch (kind) {
never@1445:   case Interpreter::zerolocals:
never@1445:   case Interpreter::zerolocals_synchronized:
never@1445:     break;
never@1445: 
never@1445:   case Interpreter::native:
never@1445:     entry_point = ((InterpreterGenerator*) this)->generate_native_entry(false);
never@1445:     break;
never@1445: 
never@1445:   case Interpreter::native_synchronized:
never@1445:     entry_point = ((InterpreterGenerator*) this)->generate_native_entry(false);
never@1445:     break;
never@1445: 
never@1445:   case Interpreter::empty:
never@1445:     entry_point = ((InterpreterGenerator*) this)->generate_empty_entry();
never@1445:     break;
never@1445: 
never@1445:   case Interpreter::accessor:
never@1445:     entry_point = ((InterpreterGenerator*) this)->generate_accessor_entry();
never@1445:     break;
never@1445: 
never@1445:   case Interpreter::abstract:
never@1445:     entry_point = ((InterpreterGenerator*) this)->generate_abstract_entry();
never@1445:     break;
never@1445: 
never@1445:   case Interpreter::method_handle:
never@1445:     entry_point = ((InterpreterGenerator*) this)->generate_method_handle_entry();
never@1445:     break;
never@1445: 
never@1445:   case Interpreter::java_lang_math_sin:
never@1445:   case Interpreter::java_lang_math_cos:
never@1445:   case Interpreter::java_lang_math_tan:
never@1445:   case Interpreter::java_lang_math_abs:
never@1445:   case Interpreter::java_lang_math_log:
never@1445:   case Interpreter::java_lang_math_log10:
never@1445:   case Interpreter::java_lang_math_sqrt:
never@1445:     entry_point = ((InterpreterGenerator*) this)->generate_math_entry(kind);
never@1445:     break;
never@1445: 
never@1445:   default:
never@1445:     ShouldNotReachHere();
never@1445:   }
never@1445: 
never@1445:   if (entry_point == NULL)
never@1445:     entry_point = ((InterpreterGenerator*) this)->generate_normal_entry(false);
never@1445: 
never@1445:   return entry_point;
never@1445: }
never@1445: 
never@1445: InterpreterGenerator::InterpreterGenerator(StubQueue* code)
never@1445:  : CppInterpreterGenerator(code) {
never@1445:    generate_all();
never@1445: }
never@1445: 
never@1445: // Deoptimization helpers
never@1445: 
never@1445: InterpreterFrame *InterpreterFrame::build(ZeroStack* stack, int size) {
never@1445:   int size_in_words = size >> LogBytesPerWord;
never@1445:   assert(size_in_words * wordSize == size, "unaligned");
never@1445:   assert(size_in_words >= header_words, "too small");
never@1445: 
never@1445:   if (size_in_words > stack->available_words()) {
never@1445:     Unimplemented();
never@1445:   }
never@1445: 
never@1445:   stack->push(0); // next_frame, filled in later
never@1445:   intptr_t *fp = stack->sp();
never@1445:   assert(fp - stack->sp() == next_frame_off, "should be");
never@1445: 
never@1445:   stack->push(INTERPRETER_FRAME);
never@1445:   assert(fp - stack->sp() == frame_type_off, "should be");
never@1445: 
never@1445:   interpreterState istate =
never@1445:     (interpreterState) stack->alloc(sizeof(BytecodeInterpreter));
never@1445:   assert(fp - stack->sp() == istate_off, "should be");
never@1445:   istate->set_self_link(NULL); // mark invalid
never@1445: 
never@1445:   stack->alloc((size_in_words - header_words) * wordSize);
never@1445: 
never@1445:   return (InterpreterFrame *) fp;
never@1445: }
never@1445: 
never@1445: int AbstractInterpreter::layout_activation(methodOop method,
never@1445:                                            int       tempcount,
never@1445:                                            int       popframe_extra_args,
never@1445:                                            int       moncount,
never@1445:                                            int       callee_param_count,
never@1445:                                            int       callee_locals,
never@1445:                                            frame*    caller,
never@1445:                                            frame*    interpreter_frame,
never@1445:                                            bool      is_top_frame) {
never@1445:   assert(popframe_extra_args == 0, "what to do?");
never@1445:   assert(!is_top_frame || (!callee_locals && !callee_param_count),
never@1445:          "top frame should have no caller")
never@1445: 
never@1445:   // This code must exactly match what InterpreterFrame::build
never@1445:   // does (the full InterpreterFrame::build, that is, not the
never@1445:   // one that creates empty frames for the deoptimizer).
never@1445:   //
never@1445:   // If interpreter_frame is not NULL then it will be filled in.
never@1445:   // It's size is determined by a previous call to this method,
never@1445:   // so it should be correct.
never@1445:   //
never@1445:   // Note that tempcount is the current size of the expression
never@1445:   // stack.  For top most frames we will allocate a full sized
never@1445:   // expression stack and not the trimmed version that non-top
never@1445:   // frames have.
never@1445: 
never@1445:   int header_words        = InterpreterFrame::header_words;
never@1445:   int monitor_words       = moncount * frame::interpreter_frame_monitor_size();
never@1445:   int stack_words         = is_top_frame ? method->max_stack() : tempcount;
never@1445:   int callee_extra_locals = callee_locals - callee_param_count;
never@1445: 
never@1445:   if (interpreter_frame) {
never@1445:     intptr_t *locals        = interpreter_frame->sp() + method->max_locals();
never@1445:     interpreterState istate = interpreter_frame->get_interpreterState();
never@1445:     intptr_t *monitor_base  = (intptr_t*) istate;
never@1445:     intptr_t *stack_base    = monitor_base - monitor_words;
never@1445:     intptr_t *stack         = stack_base - tempcount - 1;
never@1445: 
never@1445:     BytecodeInterpreter::layout_interpreterState(istate,
never@1445:                                                  caller,
never@1445:                                                  NULL,
never@1445:                                                  method,
never@1445:                                                  locals,
never@1445:                                                  stack,
never@1445:                                                  stack_base,
never@1445:                                                  monitor_base,
never@1445:                                                  NULL,
never@1445:                                                  is_top_frame);
never@1445:   }
never@1445:   return header_words + monitor_words + stack_words + callee_extra_locals;
never@1445: }
never@1445: 
never@1445: void BytecodeInterpreter::layout_interpreterState(interpreterState istate,
never@1445:                                                   frame*    caller,
never@1445:                                                   frame*    current,
never@1445:                                                   methodOop method,
never@1445:                                                   intptr_t* locals,
never@1445:                                                   intptr_t* stack,
never@1445:                                                   intptr_t* stack_base,
never@1445:                                                   intptr_t* monitor_base,
never@1445:                                                   intptr_t* frame_bottom,
never@1445:                                                   bool      is_top_frame) {
never@1445:   istate->set_locals(locals);
never@1445:   istate->set_method(method);
never@1445:   istate->set_self_link(istate);
never@1445:   istate->set_prev_link(NULL);
never@1445:   // thread will be set by a hacky repurposing of frame::patch_pc()
never@1445:   // bcp will be set by vframeArrayElement::unpack_on_stack()
never@1445:   istate->set_constants(method->constants()->cache());
never@1445:   istate->set_msg(BytecodeInterpreter::method_resume);
never@1445:   istate->set_bcp_advance(0);
never@1445:   istate->set_oop_temp(NULL);
never@1445:   istate->set_mdx(NULL);
never@1445:   if (caller->is_interpreted_frame()) {
never@1445:     interpreterState prev = caller->get_interpreterState();
never@1445:     prev->set_callee(method);
never@1445:     if (*prev->bcp() == Bytecodes::_invokeinterface)
never@1445:       prev->set_bcp_advance(5);
never@1445:     else
never@1445:       prev->set_bcp_advance(3);
never@1445:   }
never@1445:   istate->set_callee(NULL);
never@1445:   istate->set_monitor_base((BasicObjectLock *) monitor_base);
never@1445:   istate->set_stack_base(stack_base);
never@1445:   istate->set_stack(stack);
never@1445:   istate->set_stack_limit(stack_base - method->max_stack() - 1);
never@1445: }
never@1445: 
never@1445: address CppInterpreter::return_entry(TosState state, int length) {
never@1445:   ShouldNotCallThis();
never@1445: }
never@1445: 
never@1445: address CppInterpreter::deopt_entry(TosState state, int length) {
never@1445:   return NULL;
never@1445: }
never@1445: 
never@1445: // Helper for (runtime) stack overflow checks
never@1445: 
never@1445: int AbstractInterpreter::size_top_interpreter_activation(methodOop method) {
never@1445:   return 0;
never@1445: }
never@1445: 
never@1445: // Helper for figuring out if frames are interpreter frames
never@1445: 
never@1445: bool CppInterpreter::contains(address pc) {
never@1445: #ifdef PRODUCT
never@1445:   ShouldNotCallThis();
never@1445: #else
never@1445:   return false; // make frame::print_value_on work
never@1445: #endif // !PRODUCT
never@1445: }
never@1445: 
never@1445: // Result handlers and convertors
never@1445: 
never@1445: address CppInterpreterGenerator::generate_result_handler_for(
never@1445:     BasicType type) {
never@1445:   assembler()->advance(1);
never@1445:   return ShouldNotCallThisStub();
never@1445: }
never@1445: 
never@1445: address CppInterpreterGenerator::generate_tosca_to_stack_converter(
never@1445:     BasicType type) {
never@1445:   assembler()->advance(1);
never@1445:   return ShouldNotCallThisStub();
never@1445: }
never@1445: 
never@1445: address CppInterpreterGenerator::generate_stack_to_stack_converter(
never@1445:     BasicType type) {
never@1445:   assembler()->advance(1);
never@1445:   return ShouldNotCallThisStub();
never@1445: }
never@1445: 
never@1445: address CppInterpreterGenerator::generate_stack_to_native_abi_converter(
never@1445:     BasicType type) {
never@1445:   assembler()->advance(1);
never@1445:   return ShouldNotCallThisStub();
never@1445: }
never@1445: 
never@1445: #endif // CC_INTERP