author | coleenp |
Tue, 01 Feb 2011 11:23:19 -0500 | |
changeset 8106 | 19106a0203fb |
parent 8076 | 96d498ec7ae1 |
child 8676 | 9098d4e927e1 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_PRIMS_METHODHANDLEWALK_HPP |
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#define SHARE_VM_PRIMS_METHODHANDLEWALK_HPP |
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#include "prims/methodHandles.hpp" |
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// Low-level parser for method handle chains. |
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class MethodHandleChain : StackObj { |
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public: |
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typedef MethodHandles::EntryKind EntryKind; |
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private: |
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Handle _root; // original target |
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Handle _method_handle; // current target |
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bool _is_last; // final guy in chain |
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bool _is_bound; // has a bound argument |
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BasicType _arg_type; // if is_bound, the bound argument type |
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int _arg_slot; // if is_bound or is_adapter, affected argument slot |
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jint _conversion; // conversion field of AMH or -1 |
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methodHandle _last_method; // if is_last, which method we target |
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Bytecodes::Code _last_invoke; // if is_last, type of invoke |
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const char* _lose_message; // saved argument to lose() |
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void set_method_handle(Handle target, TRAPS); |
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void set_last_method(oop target, TRAPS); |
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static BasicType compute_bound_arg_type(oop target, methodOop m, int arg_slot, TRAPS); |
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oop MethodHandle_type_oop() { return java_dyn_MethodHandle::type(method_handle_oop()); } |
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oop MethodHandle_vmtarget_oop() { return java_dyn_MethodHandle::vmtarget(method_handle_oop()); } |
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int MethodHandle_vmslots() { return java_dyn_MethodHandle::vmslots(method_handle_oop()); } |
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int DirectMethodHandle_vmindex() { return sun_dyn_DirectMethodHandle::vmindex(method_handle_oop()); } |
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oop BoundMethodHandle_argument_oop() { return sun_dyn_BoundMethodHandle::argument(method_handle_oop()); } |
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int BoundMethodHandle_vmargslot() { return sun_dyn_BoundMethodHandle::vmargslot(method_handle_oop()); } |
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int AdapterMethodHandle_conversion() { return sun_dyn_AdapterMethodHandle::conversion(method_handle_oop()); } |
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public: |
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MethodHandleChain(Handle root, TRAPS) |
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: _root(root) |
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{ set_method_handle(root, THREAD); } |
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bool is_adapter() { return _conversion != -1; } |
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bool is_bound() { return _is_bound; } |
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bool is_last() { return _is_last; } |
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void next(TRAPS) { |
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assert(!is_last(), ""); |
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set_method_handle(MethodHandle_vmtarget_oop(), THREAD); |
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} |
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Handle method_handle() { return _method_handle; } |
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oop method_handle_oop() { return _method_handle(); } |
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oop method_type_oop() { return MethodHandle_type_oop(); } |
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oop vmtarget_oop() { return MethodHandle_vmtarget_oop(); } |
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jint adapter_conversion() { assert(is_adapter(), ""); return _conversion; } |
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int adapter_conversion_op() { return MethodHandles::adapter_conversion_op(adapter_conversion()); } |
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BasicType adapter_conversion_src_type() |
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{ return MethodHandles::adapter_conversion_src_type(adapter_conversion()); } |
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BasicType adapter_conversion_dest_type() |
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{ return MethodHandles::adapter_conversion_dest_type(adapter_conversion()); } |
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int adapter_conversion_stack_move() |
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{ return MethodHandles::adapter_conversion_stack_move(adapter_conversion()); } |
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int adapter_conversion_stack_pushes() |
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{ return adapter_conversion_stack_move() / MethodHandles::stack_move_unit(); } |
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int adapter_conversion_vminfo() |
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{ return MethodHandles::adapter_conversion_vminfo(adapter_conversion()); } |
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int adapter_arg_slot() { assert(is_adapter(), ""); return _arg_slot; } |
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oop adapter_arg_oop() { assert(is_adapter(), ""); return BoundMethodHandle_argument_oop(); } |
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BasicType bound_arg_type() { assert(is_bound(), ""); return _arg_type; } |
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int bound_arg_slot() { assert(is_bound(), ""); return _arg_slot; } |
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oop bound_arg_oop() { assert(is_bound(), ""); return BoundMethodHandle_argument_oop(); } |
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methodOop last_method_oop() { assert(is_last(), ""); return _last_method(); } |
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Bytecodes::Code last_invoke_code() { assert(is_last(), ""); return _last_invoke; } |
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void lose(const char* msg, TRAPS); |
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const char* lose_message() { return _lose_message; } |
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}; |
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// Structure walker for method handles. |
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// Does abstract interpretation on top of low-level parsing. |
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// You supply the tokens shuffled by the abstract interpretation. |
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class MethodHandleWalker : StackObj { |
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// Stack values: |
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enum TokenType { |
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tt_void, |
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tt_parameter, |
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tt_temporary, |
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tt_constant, |
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tt_illegal |
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}; |
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// Argument token: |
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class ArgToken { |
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private: |
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TokenType _tt; |
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BasicType _bt; |
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jvalue _value; |
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Handle _handle; |
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public: |
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ArgToken(TokenType tt = tt_illegal) : _tt(tt) {} |
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ArgToken(TokenType tt, BasicType bt, jvalue value) : _tt(tt), _bt(bt), _value(value) {} |
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ArgToken(TokenType tt, BasicType bt, int index) : _tt(tt), _bt(bt) { |
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_value.i = index; |
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} |
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|
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ArgToken(TokenType tt, BasicType bt, Handle value) : _tt(tt), _bt(bt) { |
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_handle = value; |
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} |
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TokenType token_type() const { return _tt; } |
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BasicType basic_type() const { return _bt; } |
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int index() const { return _value.i; } |
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Handle object() const { return _handle; } |
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|
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jint get_jint() const { return _value.i; } |
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jlong get_jlong() const { return _value.j; } |
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jfloat get_jfloat() const { return _value.f; } |
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jdouble get_jdouble() const { return _value.d; } |
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}; |
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// Abstract interpretation state: |
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struct SlotState { |
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BasicType _type; |
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ArgToken _arg; |
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SlotState() : _type(), _arg() {} |
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}; |
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static SlotState make_state(BasicType type, ArgToken arg) { |
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SlotState ss; |
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ss._type = type; ss._arg = arg; |
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return ss; |
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} |
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private: |
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MethodHandleChain _chain; |
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bool _for_invokedynamic; |
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int _local_index; |
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GrowableArray<SlotState> _outgoing; // current outgoing parameter slots |
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int _outgoing_argc; // # non-empty outgoing slots |
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// Replace a value of type old_type at slot (and maybe slot+1) with the new value. |
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// If old_type != T_VOID, remove the old argument at that point. |
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// If new_type != T_VOID, insert the new argument at that point. |
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// Insert or delete a second empty slot as needed. |
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void change_argument(BasicType old_type, int slot, BasicType new_type, const ArgToken& new_arg); |
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SlotState* slot_state(int slot) { |
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if (slot < 0 || slot >= _outgoing.length()) |
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return NULL; |
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return _outgoing.adr_at(slot); |
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} |
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BasicType slot_type(int slot) { |
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SlotState* ss = slot_state(slot); |
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if (ss == NULL) |
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return T_ILLEGAL; |
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return ss->_type; |
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} |
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bool slot_has_argument(int slot) { |
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return slot_type(slot) < T_VOID; |
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} |
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#ifdef ASSERT |
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int argument_count_slow(); |
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#endif |
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// Return a bytecode for converting src to dest, if one exists. |
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Bytecodes::Code conversion_code(BasicType src, BasicType dest); |
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|
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void walk_incoming_state(TRAPS); |
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public: |
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MethodHandleWalker(Handle root, bool for_invokedynamic, TRAPS) |
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: _chain(root, THREAD), |
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_for_invokedynamic(for_invokedynamic), |
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_outgoing(THREAD, 10), |
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_outgoing_argc(0) |
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{ |
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_local_index = for_invokedynamic ? 0 : 1; |
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} |
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MethodHandleChain& chain() { return _chain; } |
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bool for_invokedynamic() const { return _for_invokedynamic; } |
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|
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int new_local_index(BasicType bt) { |
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//int index = _for_invokedynamic ? _local_index : _local_index - 1; |
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int index = _local_index; |
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_local_index += type2size[bt]; |
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return index; |
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} |
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|
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int max_locals() const { return _local_index; } |
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222 |
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// plug-in abstract interpretation steps: |
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virtual ArgToken make_parameter( BasicType type, klassOop tk, int argnum, TRAPS ) = 0; |
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virtual ArgToken make_prim_constant( BasicType type, jvalue* con, TRAPS ) = 0; |
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virtual ArgToken make_oop_constant( oop con, TRAPS ) = 0; |
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virtual ArgToken make_conversion( BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS ) = 0; |
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virtual ArgToken make_fetch( BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS ) = 0; |
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virtual ArgToken make_invoke( methodOop m, vmIntrinsics::ID iid, Bytecodes::Code op, bool tailcall, int argc, ArgToken* argv, TRAPS ) = 0; |
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|
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// For make_invoke, the methodOop can be NULL if the intrinsic ID |
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// is something other than vmIntrinsics::_none. |
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// and in case anyone cares to related the previous actions to the chain: |
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virtual void set_method_handle(oop mh) { } |
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|
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void lose(const char* msg, TRAPS) { chain().lose(msg, THREAD); } |
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const char* lose_message() { return chain().lose_message(); } |
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|
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ArgToken walk(TRAPS); |
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}; |
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|
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243 |
|
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// An abstract interpreter for method handle chains. |
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// Produces an account of the semantics of a chain, in terms of a static IR. |
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// The IR happens to be JVM bytecodes. |
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class MethodHandleCompiler : public MethodHandleWalker { |
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private: |
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methodHandle _callee; |
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KlassHandle _rklass; // Return type for casting. |
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BasicType _rtype; |
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KlassHandle _target_klass; |
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Thread* _thread; |
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254 |
|
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// Fake constant pool entry. |
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class ConstantValue { |
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private: |
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int _tag; // Constant pool tag type. |
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JavaValue _value; |
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Handle _handle; |
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Symbol* _sym; |
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|
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263 |
public: |
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// Constructor for oop types. |
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ConstantValue(int tag, Handle con) : _tag(tag), _handle(con) { |
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assert(tag == JVM_CONSTANT_Class || |
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tag == JVM_CONSTANT_String || |
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tag == JVM_CONSTANT_Object, "must be oop type"); |
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} |
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|
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ConstantValue(int tag, Symbol* con) : _tag(tag), _sym(con) { |
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assert(tag == JVM_CONSTANT_Utf8, "must be symbol type"); |
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} |
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|
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// Constructor for oop reference types. |
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ConstantValue(int tag, int index) : _tag(tag) { |
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assert(JVM_CONSTANT_Fieldref <= tag && tag <= JVM_CONSTANT_NameAndType, "must be ref type"); |
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_value.set_jint(index); |
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} |
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ConstantValue(int tag, int first_index, int second_index) : _tag(tag) { |
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assert(JVM_CONSTANT_Fieldref <= tag && tag <= JVM_CONSTANT_NameAndType, "must be ref type"); |
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_value.set_jint(first_index << 16 | second_index); |
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} |
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|
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// Constructor for primitive types. |
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ConstantValue(BasicType bt, jvalue con) { |
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_value.set_type(bt); |
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switch (bt) { |
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case T_INT: _tag = JVM_CONSTANT_Integer; _value.set_jint( con.i); break; |
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case T_LONG: _tag = JVM_CONSTANT_Long; _value.set_jlong( con.j); break; |
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case T_FLOAT: _tag = JVM_CONSTANT_Float; _value.set_jfloat( con.f); break; |
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case T_DOUBLE: _tag = JVM_CONSTANT_Double; _value.set_jdouble(con.d); break; |
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default: ShouldNotReachHere(); |
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} |
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} |
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|
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int tag() const { return _tag; } |
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Symbol* symbol() const { return _sym; } |
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klassOop klass_oop() const { return (klassOop) _handle(); } |
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oop object_oop() const { return _handle(); } |
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int index() const { return _value.get_jint(); } |
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int first_index() const { return _value.get_jint() >> 16; } |
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int second_index() const { return _value.get_jint() & 0x0000FFFF; } |
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|
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bool is_primitive() const { return is_java_primitive(_value.get_type()); } |
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jint get_jint() const { return _value.get_jint(); } |
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jlong get_jlong() const { return _value.get_jlong(); } |
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jfloat get_jfloat() const { return _value.get_jfloat(); } |
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jdouble get_jdouble() const { return _value.get_jdouble(); } |
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}; |
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|
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// Fake constant pool. |
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GrowableArray<ConstantValue*> _constants; |
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|
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// Accumulated compiler state: |
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GrowableArray<unsigned char> _bytecode; |
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|
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int _cur_stack; |
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int _max_stack; |
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int _num_params; |
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int _name_index; |
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int _signature_index; |
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|
323 |
|
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void stack_push(BasicType bt) { |
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_cur_stack += type2size[bt]; |
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if (_cur_stack > _max_stack) _max_stack = _cur_stack; |
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} |
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void stack_pop(BasicType bt) { |
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_cur_stack -= type2size[bt]; |
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assert(_cur_stack >= 0, "sanity"); |
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} |
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|
332 |
|
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unsigned char* bytecode() const { return _bytecode.adr_at(0); } |
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int bytecode_length() const { return _bytecode.length(); } |
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335 |
|
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// Fake constant pool. |
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int cpool_oop_put(int tag, Handle con) { |
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if (con.is_null()) return 0; |
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ConstantValue* cv = new ConstantValue(tag, con); |
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return _constants.append(cv); |
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341 |
} |
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|
342 |
|
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int cpool_symbol_put(int tag, Symbol* con) { |
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if (con == NULL) return 0; |
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ConstantValue* cv = new ConstantValue(tag, con); |
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return _constants.append(cv); |
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} |
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348 |
|
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int cpool_oop_reference_put(int tag, int first_index, int second_index) { |
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if (first_index == 0 && second_index == 0) return 0; |
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assert(first_index != 0 && second_index != 0, "no zero indexes"); |
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ConstantValue* cv = new ConstantValue(tag, first_index, second_index); |
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|
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return _constants.append(cv); |
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} |
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355 |
|
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int cpool_primitive_put(BasicType type, jvalue* con); |
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357 |
|
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int cpool_int_put(jint value) { |
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jvalue con; con.i = value; |
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return cpool_primitive_put(T_INT, &con); |
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} |
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int cpool_long_put(jlong value) { |
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jvalue con; con.j = value; |
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return cpool_primitive_put(T_LONG, &con); |
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365 |
} |
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int cpool_float_put(jfloat value) { |
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jvalue con; con.f = value; |
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return cpool_primitive_put(T_FLOAT, &con); |
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} |
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int cpool_double_put(jdouble value) { |
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jvalue con; con.d = value; |
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return cpool_primitive_put(T_DOUBLE, &con); |
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} |
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374 |
|
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int cpool_object_put(Handle obj) { |
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return cpool_oop_put(JVM_CONSTANT_Object, obj); |
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} |
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int cpool_symbol_put(Symbol* sym) { |
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return cpool_symbol_put(JVM_CONSTANT_Utf8, sym); |
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} |
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int cpool_klass_put(klassOop klass) { |
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return cpool_oop_put(JVM_CONSTANT_Class, klass); |
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383 |
} |
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int cpool_methodref_put(int class_index, int name_and_type_index) { |
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return cpool_oop_reference_put(JVM_CONSTANT_Methodref, class_index, name_and_type_index); |
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386 |
} |
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int cpool_name_and_type_put(int name_index, int signature_index) { |
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return cpool_oop_reference_put(JVM_CONSTANT_NameAndType, name_index, signature_index); |
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} |
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|
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void emit_bc(Bytecodes::Code op, int index = 0); |
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void emit_load(BasicType bt, int index); |
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void emit_store(BasicType bt, int index); |
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void emit_load_constant(ArgToken arg); |
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|
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virtual ArgToken make_parameter(BasicType type, klassOop tk, int argnum, TRAPS) { |
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return ArgToken(tt_parameter, type, argnum); |
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} |
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virtual ArgToken make_oop_constant(oop con, TRAPS) { |
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Handle h(THREAD, con); |
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return ArgToken(tt_constant, T_OBJECT, h); |
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} |
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virtual ArgToken make_prim_constant(BasicType type, jvalue* con, TRAPS) { |
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return ArgToken(tt_constant, type, *con); |
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} |
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|
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virtual ArgToken make_conversion(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS); |
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virtual ArgToken make_fetch(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS); |
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virtual ArgToken make_invoke(methodOop m, vmIntrinsics::ID iid, Bytecodes::Code op, bool tailcall, int argc, ArgToken* argv, TRAPS); |
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|
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// Get a real constant pool. |
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constantPoolHandle get_constant_pool(TRAPS) const; |
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|
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// Get a real methodOop. |
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methodHandle get_method_oop(TRAPS) const; |
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|
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public: |
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MethodHandleCompiler(Handle root, methodHandle call_method, bool for_invokedynamic, TRAPS); |
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|
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// Compile the given MH chain into bytecode. |
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methodHandle compile(TRAPS); |
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|
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// Tests if the given class is a MH adapter holder. |
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static bool klass_is_method_handle_adapter_holder(klassOop klass) { |
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return (klass == SystemDictionary::MethodHandle_klass()); |
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} |
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}; |
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#endif // SHARE_VM_PRIMS_METHODHANDLEWALK_HPP |