duke@435: /* duke@435: * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. duke@435: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. duke@435: * duke@435: * This code is free software; you can redistribute it and/or modify it duke@435: * under the terms of the GNU General Public License version 2 only, as duke@435: * published by the Free Software Foundation. duke@435: * duke@435: * This code is distributed in the hope that it will be useful, but WITHOUT duke@435: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or duke@435: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License duke@435: * version 2 for more details (a copy is included in the LICENSE file that duke@435: * accompanied this code). duke@435: * duke@435: * You should have received a copy of the GNU General Public License version duke@435: * 2 along with this work; if not, write to the Free Software Foundation, duke@435: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. duke@435: * duke@435: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, duke@435: * CA 95054 USA or visit www.sun.com if you need additional information or duke@435: * have any questions. duke@435: * duke@435: */ duke@435: twisti@1040: // This file contains the platform-independent parts duke@435: // of the abstract interpreter and the abstract interpreter generator. duke@435: duke@435: // Organization of the interpreter(s). There exists two different interpreters in hotpot duke@435: // an assembly language version (aka template interpreter) and a high level language version duke@435: // (aka c++ interpreter). Th division of labor is as follows: duke@435: duke@435: // Template Interpreter C++ Interpreter Functionality duke@435: // duke@435: // templateTable* bytecodeInterpreter* actual interpretation of bytecodes duke@435: // duke@435: // templateInterpreter* cppInterpreter* generation of assembly code that creates duke@435: // and manages interpreter runtime frames. duke@435: // Also code for populating interpreter duke@435: // frames created during deoptimization. duke@435: // duke@435: // For both template and c++ interpreter. There are common files for aspects of the interpreter duke@435: // that are generic to both interpreters. This is the layout: duke@435: // duke@435: // abstractInterpreter.hpp: generic description of the interpreter. duke@435: // interpreter*: generic frame creation and handling. duke@435: // duke@435: duke@435: //------------------------------------------------------------------------------------------------------------------------ duke@435: // The C++ interface to the bytecode interpreter(s). duke@435: duke@435: class AbstractInterpreter: AllStatic { duke@435: friend class VMStructs; duke@435: friend class Interpreter; duke@435: friend class CppInterpreterGenerator; duke@435: public: duke@435: enum MethodKind { duke@435: zerolocals, // method needs locals initialization duke@435: zerolocals_synchronized, // method needs locals initialization & is synchronized duke@435: native, // native method duke@435: native_synchronized, // native method & is synchronized duke@435: empty, // empty method (code: _return) duke@435: accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return) duke@435: abstract, // abstract method (throws an AbstractMethodException) duke@435: java_lang_math_sin, // implementation of java.lang.Math.sin (x) duke@435: java_lang_math_cos, // implementation of java.lang.Math.cos (x) duke@435: java_lang_math_tan, // implementation of java.lang.Math.tan (x) duke@435: java_lang_math_abs, // implementation of java.lang.Math.abs (x) duke@435: java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x) duke@435: java_lang_math_log, // implementation of java.lang.Math.log (x) duke@435: java_lang_math_log10, // implementation of java.lang.Math.log10 (x) duke@435: number_of_method_entries, duke@435: invalid = -1 duke@435: }; duke@435: duke@435: enum SomeConstants { duke@435: number_of_result_handlers = 10 // number of result handlers for native calls duke@435: }; duke@435: duke@435: protected: duke@435: static StubQueue* _code; // the interpreter code (codelets) duke@435: duke@435: static bool _notice_safepoints; // true if safepoints are activated duke@435: duke@435: static address _native_entry_begin; // Region for native entry code duke@435: static address _native_entry_end; duke@435: duke@435: // method entry points duke@435: static address _entry_table[number_of_method_entries]; // entry points for a given method duke@435: static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers duke@435: static address _slow_signature_handler; // the native method generic (slow) signature handler duke@435: duke@435: static address _rethrow_exception_entry; // rethrows an activation in previous frame duke@435: duke@435: duke@435: duke@435: friend class AbstractInterpreterGenerator; duke@435: friend class InterpreterGenerator; duke@435: friend class InterpreterMacroAssembler; duke@435: duke@435: public: duke@435: // Initialization/debugging duke@435: static void initialize(); duke@435: static StubQueue* code() { return _code; } duke@435: duke@435: duke@435: // Method activation duke@435: static MethodKind method_kind(methodHandle m); duke@435: static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; } duke@435: static address entry_for_method(methodHandle m) { return _entry_table[method_kind(m)]; } duke@435: duke@435: static void print_method_kind(MethodKind kind) PRODUCT_RETURN; duke@435: duke@435: // Runtime support duke@435: duke@435: // length = invoke bytecode length (to advance to next bytecode) duke@435: static address deopt_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; } duke@435: static address return_entry (TosState state, int length) { ShouldNotReachHere(); return NULL; } duke@435: duke@435: static address rethrow_exception_entry() { return _rethrow_exception_entry; } duke@435: duke@435: // Activation size in words for a method that is just being called. duke@435: // Parameters haven't been pushed so count them too. duke@435: static int size_top_interpreter_activation(methodOop method); duke@435: duke@435: // Deoptimization support duke@435: static address continuation_for(methodOop method, duke@435: address bcp, duke@435: int callee_parameters, duke@435: bool is_top_frame, duke@435: bool& use_next_mdp); duke@435: duke@435: // share implementation of size_activation and layout_activation: duke@435: static int size_activation(methodOop method, duke@435: int temps, duke@435: int popframe_args, duke@435: int monitors, duke@435: int callee_params, duke@435: int callee_locals, duke@435: bool is_top_frame); duke@435: duke@435: static int layout_activation(methodOop method, duke@435: int temps, duke@435: int popframe_args, duke@435: int monitors, duke@435: int callee_params, duke@435: int callee_locals, duke@435: frame* caller, duke@435: frame* interpreter_frame, duke@435: bool is_top_frame); duke@435: duke@435: // Runtime support duke@435: static bool is_not_reached( methodHandle method, int bci); duke@435: // Safepoint support duke@435: static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint duke@435: static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints duke@435: duke@435: // Support for native calls duke@435: static address slow_signature_handler() { return _slow_signature_handler; } duke@435: static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; } duke@435: static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table duke@435: static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; } duke@435: // Debugging/printing duke@435: static void print(); // prints the interpreter code duke@435: duke@435: // Support for Tagged Stacks duke@435: // duke@435: // Tags are stored on the Java Expression stack above the value: duke@435: // duke@435: // tag duke@435: // value duke@435: // duke@435: // For double values: duke@435: // duke@435: // tag2 duke@435: // high word duke@435: // tag1 duke@435: // low word duke@435: duke@435: public: duke@435: static int stackElementWords() { return TaggedStackInterpreter ? 2 : 1; } duke@435: static int stackElementSize() { return stackElementWords()*wordSize; } duke@435: static int logStackElementSize() { return duke@435: TaggedStackInterpreter? LogBytesPerWord+1 : LogBytesPerWord; } duke@435: duke@435: // Tag is at pointer, value is one below for a stack growing down duke@435: // (or above for stack growing up) duke@435: static int value_offset_in_bytes() { duke@435: return TaggedStackInterpreter ? duke@435: frame::interpreter_frame_expression_stack_direction() * wordSize : 0; duke@435: } duke@435: static int tag_offset_in_bytes() { duke@435: assert(TaggedStackInterpreter, "should not call this"); duke@435: return 0; duke@435: } duke@435: duke@435: // Tagged Locals duke@435: // Locals are stored relative to Llocals: duke@435: // duke@435: // tag <- Llocals[n] duke@435: // value duke@435: // duke@435: // Category 2 types are indexed as: duke@435: // duke@435: // tag <- Llocals[-n] duke@435: // high word duke@435: // tag <- Llocals[-n+1] duke@435: // low word duke@435: // duke@435: duke@435: // Local values relative to locals[n] duke@435: static int local_offset_in_bytes(int n) { duke@435: return ((frame::interpreter_frame_expression_stack_direction() * n) * duke@435: stackElementSize()) + value_offset_in_bytes(); duke@435: } duke@435: static int local_tag_offset_in_bytes(int n) { duke@435: assert(TaggedStackInterpreter, "should not call this"); duke@435: return ((frame::interpreter_frame_expression_stack_direction() * n) * duke@435: stackElementSize()) + tag_offset_in_bytes(); duke@435: } duke@435: duke@435: }; duke@435: duke@435: //------------------------------------------------------------------------------------------------------------------------ duke@435: // The interpreter generator. duke@435: duke@435: class Template; duke@435: class AbstractInterpreterGenerator: public StackObj { duke@435: protected: duke@435: InterpreterMacroAssembler* _masm; duke@435: duke@435: // shared code sequences duke@435: // Converter for native abi result to tosca result duke@435: address generate_result_handler_for(BasicType type); duke@435: address generate_slow_signature_handler(); duke@435: duke@435: // entry point generator duke@435: address generate_method_entry(AbstractInterpreter::MethodKind kind); duke@435: duke@435: void bang_stack_shadow_pages(bool native_call); duke@435: duke@435: void generate_all(); duke@435: duke@435: public: duke@435: AbstractInterpreterGenerator(StubQueue* _code); duke@435: };