author | bdelsart |
Wed, 14 Sep 2011 16:28:39 +0200 | |
changeset 10551 | 095307d09cb3 |
parent 10514 | e229a19078cf |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2011, 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_lang_invoke_MethodHandle::type(method_handle_oop()); } |
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oop MethodHandle_vmtarget_oop() { return java_lang_invoke_MethodHandle::vmtarget(method_handle_oop()); } |
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int MethodHandle_vmslots() { return java_lang_invoke_MethodHandle::vmslots(method_handle_oop()); } |
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int DirectMethodHandle_vmindex() { return java_lang_invoke_DirectMethodHandle::vmindex(method_handle_oop()); } |
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oop BoundMethodHandle_argument_oop() { return java_lang_invoke_BoundMethodHandle::argument(method_handle_oop()); } |
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int BoundMethodHandle_vmargslot() { return java_lang_invoke_BoundMethodHandle::vmargslot(method_handle_oop()); } |
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int AdapterMethodHandle_conversion() { return java_lang_invoke_AdapterMethodHandle::conversion(method_handle_oop()); } |
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#ifdef ASSERT |
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void print_impl(TRAPS); |
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#endif |
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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 root() { return _root; } |
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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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methodHandle last_method() { assert(is_last(), ""); return _last_method; } |
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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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#ifdef ASSERT |
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// Print a symbolic description of a method handle chain, including |
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// the signature for each method. The signatures are printed in |
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// slot order to make it easier to understand. |
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void print(); |
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static void print(oopDesc* mh); |
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#endif |
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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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public: |
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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_symbolic, |
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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), _bt(tt == tt_void ? T_VOID : T_ILLEGAL) { |
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assert(tt == tt_illegal || tt == tt_void, "invalid token type"); |
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} |
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ArgToken(TokenType tt, BasicType bt, int index) : _tt(tt), _bt(bt) { |
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assert(_tt == tt_parameter || _tt == tt_temporary, "must have index"); |
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_value.i = index; |
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} |
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ArgToken(BasicType bt, jvalue value) : _tt(tt_constant), _bt(bt), _value(value) { assert(_bt != T_OBJECT, "wrong constructor"); } |
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ArgToken(Handle handle) : _tt(tt_constant), _bt(T_OBJECT), _handle(handle) {} |
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|
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ArgToken(const char* str, BasicType type) : _tt(tt_symbolic), _bt(type) { |
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_value.j = (intptr_t)str; |
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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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bool has_index() const { return _tt == tt_parameter || _tt == tt_temporary; } |
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int index() const { assert(has_index(), "must have index");; return _value.i; } |
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Handle object() const { assert(_bt == T_OBJECT, "wrong accessor"); assert(_tt == tt_constant, "value type"); return _handle; } |
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const char* str() const { assert(_tt == tt_symbolic, "string type"); return (const char*)(intptr_t)_value.j; } |
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166 |
|
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jint get_jint() const { assert(_bt == T_INT || is_subword_type(_bt), "wrong accessor"); assert(_tt == tt_constant, "value types"); return _value.i; } |
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jlong get_jlong() const { assert(_bt == T_LONG, "wrong accessor"); assert(_tt == tt_constant, "value types"); return _value.j; } |
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jfloat get_jfloat() const { assert(_bt == T_FLOAT, "wrong accessor"); assert(_tt == tt_constant, "value types"); return _value.f; } |
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jdouble get_jdouble() const { assert(_bt == T_DOUBLE, "wrong accessor"); assert(_tt == tt_constant, "value types"); return _value.d; } |
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}; |
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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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// This array is kept in an unusual order, indexed by low-level "slot number". |
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// TOS is always _outgoing.at(0), so simple pushes and pops shift the whole _outgoing array. |
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// If there is a receiver in the current argument list, it is at _outgoing.at(_outgoing.length()-1). |
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// If a value at _outgoing.at(n) is T_LONG or T_DOUBLE, the value at _outgoing.at(n+1) is T_VOID. |
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GrowableArray<ArgToken> _outgoing; // current outgoing parameter slots |
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int _outgoing_argc; // # non-empty outgoing slots |
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184 |
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vmIntrinsics::ID _return_conv; // Return conversion required by raw retypes. |
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186 |
|
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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, const ArgToken& new_arg); |
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void change_argument(BasicType old_type, int slot, BasicType type, const ArgToken& new_arg) { |
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assert(type == new_arg.basic_type(), "must agree"); |
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change_argument(old_type, slot, new_arg); |
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} |
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// Raw retype conversions for OP_RAW_RETYPE. |
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void retype_raw_conversion(BasicType src, BasicType dst, bool for_return, int slot, TRAPS); |
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void retype_raw_argument_type(BasicType src, BasicType dst, int slot, TRAPS) { retype_raw_conversion(src, dst, false, slot, CHECK); } |
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void retype_raw_return_type( BasicType src, BasicType dst, TRAPS) { retype_raw_conversion(src, dst, true, -1, CHECK); } |
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201 |
|
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BasicType arg_type(int slot) { |
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return _outgoing.at(slot).basic_type(); |
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} |
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bool has_argument(int slot) { |
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return arg_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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212 |
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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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void verify_args_and_signature(TRAPS) NOT_DEBUG_RETURN; |
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|
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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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_return_conv(vmIntrinsics::_none) |
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{ |
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_local_index = for_invokedynamic ? 0 : 1; |
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} |
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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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vmIntrinsics::ID return_conv() const { return _return_conv; } |
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void set_return_conv(vmIntrinsics::ID c) { _return_conv = c; } |
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static vmIntrinsics::ID zero_return_conv() { return vmIntrinsics::_min; } |
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238 |
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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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int max_locals() const { return _local_index; } |
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|
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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(methodHandle m, vmIntrinsics::ID iid, Bytecodes::Code op, bool tailcall, int argc, ArgToken* argv, TRAPS) = 0; |
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// For make_invoke, the methodHandle can be NULL if the intrinsic ID |
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// is something other than vmIntrinsics::_none. |
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|
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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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ArgToken walk(TRAPS); |
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}; |
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268 |
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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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int _invoke_count; // count the original call site has been executed |
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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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279 |
|
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int _selectAlternative_bci; // These are used for capturing profiles from GWTs |
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int _taken_count; |
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int _not_taken_count; |
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283 |
|
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// Values used by the compiler. |
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static jvalue zero_jvalue; |
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static jvalue one_jvalue; |
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287 |
|
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// Fake constant pool entry. |
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class ConstantValue : public ResourceObj { |
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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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methodHandle _method; // pre-linkage |
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296 |
|
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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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308 |
|
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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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330 |
|
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331 |
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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338 |
|
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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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void set_linkage(methodHandle method) { |
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assert(_method.is_null(), ""); |
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_method = method; |
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} |
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bool has_linkage() const { return _method.not_null(); } |
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methodHandle linkage() const { return _method; } |
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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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355 |
|
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// Non-BCP classes that appear in associated MethodTypes (require special handling). |
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GrowableArray<KlassHandle> _non_bcp_klasses; |
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358 |
|
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// Accumulated compiler state: |
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GrowableArray<unsigned char> _bytecode; |
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361 |
|
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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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367 |
|
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368 |
void stack_push(BasicType bt) { |
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|
369 |
_cur_stack += type2size[bt]; |
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|
370 |
if (_cur_stack > _max_stack) _max_stack = _cur_stack; |
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|
371 |
} |
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|
372 |
void stack_pop(BasicType bt) { |
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|
373 |
_cur_stack -= type2size[bt]; |
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|
374 |
assert(_cur_stack >= 0, "sanity"); |
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|
375 |
} |
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|
376 |
|
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|
377 |
unsigned char* bytecode() const { return _bytecode.adr_at(0); } |
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|
378 |
int bytecode_length() const { return _bytecode.length(); } |
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int cur_bci() const { return _bytecode.length(); } |
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|
380 |
|
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381 |
// Fake constant pool. |
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382 |
int cpool_oop_put(int tag, Handle con) { |
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|
383 |
if (con.is_null()) return 0; |
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|
384 |
ConstantValue* cv = new ConstantValue(tag, con); |
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|
385 |
return _constants.append(cv); |
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|
386 |
} |
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|
387 |
|
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388 |
int cpool_symbol_put(int tag, Symbol* con) { |
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389 |
if (con == NULL) return 0; |
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|
390 |
ConstantValue* cv = new ConstantValue(tag, con); |
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|
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con->increment_refcount(); |
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|
392 |
return _constants.append(cv); |
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|
393 |
} |
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|
394 |
|
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|
395 |
int cpool_oop_reference_put(int tag, int first_index, int second_index, methodHandle method) { |
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|
396 |
if (first_index == 0 && second_index == 0) return 0; |
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|
397 |
assert(first_index != 0 && second_index != 0, "no zero indexes"); |
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|
398 |
ConstantValue* cv = new ConstantValue(tag, first_index, second_index); |
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|
399 |
if (method.not_null()) cv->set_linkage(method); |
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|
400 |
return _constants.append(cv); |
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|
401 |
} |
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|
402 |
|
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|
403 |
int cpool_primitive_put(BasicType type, jvalue* con); |
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|
404 |
|
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|
405 |
bool check_non_bcp_klasses(Handle method_type, TRAPS); |
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|
406 |
bool check_non_bcp_klass(klassOop klass, TRAPS); |
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|
407 |
void record_non_bcp_klasses(); |
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|
408 |
|
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|
409 |
int cpool_int_put(jint value) { |
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|
410 |
jvalue con; con.i = value; |
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|
411 |
return cpool_primitive_put(T_INT, &con); |
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|
412 |
} |
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|
413 |
int cpool_long_put(jlong value) { |
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|
414 |
jvalue con; con.j = value; |
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|
415 |
return cpool_primitive_put(T_LONG, &con); |
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|
416 |
} |
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|
417 |
int cpool_float_put(jfloat value) { |
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|
418 |
jvalue con; con.f = value; |
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|
419 |
return cpool_primitive_put(T_FLOAT, &con); |
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|
420 |
} |
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|
421 |
int cpool_double_put(jdouble value) { |
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|
422 |
jvalue con; con.d = value; |
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|
423 |
return cpool_primitive_put(T_DOUBLE, &con); |
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|
424 |
} |
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|
425 |
|
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|
426 |
int cpool_object_put(Handle obj) { |
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|
427 |
return cpool_oop_put(JVM_CONSTANT_Object, obj); |
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|
428 |
} |
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|
429 |
int cpool_symbol_put(Symbol* sym) { |
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|
430 |
return cpool_symbol_put(JVM_CONSTANT_Utf8, sym); |
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|
431 |
} |
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|
432 |
int cpool_klass_put(klassOop klass) { |
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|
433 |
return cpool_oop_put(JVM_CONSTANT_Class, klass); |
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|
434 |
} |
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|
435 |
int cpool_methodref_put(Bytecodes::Code op, int class_index, int name_and_type_index, methodHandle method) { |
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|
436 |
int tag = (op == Bytecodes::_invokeinterface ? JVM_CONSTANT_InterfaceMethodref : JVM_CONSTANT_Methodref); |
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|
437 |
return cpool_oop_reference_put(tag, class_index, name_and_type_index, method); |
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|
438 |
} |
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|
439 |
int cpool_name_and_type_put(int name_index, int signature_index) { |
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|
440 |
return cpool_oop_reference_put(JVM_CONSTANT_NameAndType, name_index, signature_index, methodHandle()); |
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|
441 |
} |
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|
442 |
|
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|
443 |
void emit_bc(Bytecodes::Code op, int index = 0, int args_size = -1); |
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|
444 |
void update_branch_dest(int src, int dst); |
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|
445 |
void emit_load(ArgToken arg); |
4567
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|
446 |
void emit_load(BasicType bt, int index); |
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|
447 |
void emit_store(BasicType bt, int index); |
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|
448 |
void emit_load_constant(ArgToken arg); |
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|
449 |
|
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|
450 |
virtual ArgToken make_parameter(BasicType type, klassOop tk, int argnum, TRAPS) { |
4567
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|
451 |
return ArgToken(tt_parameter, type, argnum); |
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|
452 |
} |
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|
453 |
virtual ArgToken make_oop_constant(oop con, TRAPS) { |
4567
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|
454 |
Handle h(THREAD, con); |
9963
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|
455 |
return ArgToken(h); |
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|
456 |
} |
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|
457 |
virtual ArgToken make_prim_constant(BasicType type, jvalue* con, TRAPS) { |
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|
458 |
return ArgToken(type, *con); |
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|
459 |
} |
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|
460 |
|
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|
461 |
virtual ArgToken make_conversion(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& src, TRAPS); |
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|
462 |
virtual ArgToken make_fetch(BasicType type, klassOop tk, Bytecodes::Code op, const ArgToken& base, const ArgToken& offset, TRAPS); |
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|
463 |
virtual ArgToken make_invoke(methodHandle m, vmIntrinsics::ID iid, Bytecodes::Code op, bool tailcall, int argc, ArgToken* argv, TRAPS); |
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|
464 |
|
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|
465 |
// Check for profiling information on a GWT and return true if it's found |
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|
466 |
bool fetch_counts(ArgToken a1, ArgToken a2); |
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|
467 |
|
4567
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|
468 |
// Get a real constant pool. |
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|
469 |
constantPoolHandle get_constant_pool(TRAPS) const; |
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|
470 |
|
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|
471 |
// Get a real methodOop. |
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|
472 |
methodHandle get_method_oop(TRAPS); |
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|
473 |
|
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|
474 |
public: |
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|
475 |
MethodHandleCompiler(Handle root, Symbol* name, Symbol* signature, int invoke_count, bool for_invokedynamic, TRAPS); |
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|
476 |
|
5d93cb2d2090
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|
477 |
// Compile the given MH chain into bytecode. |
4567
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|
478 |
methodHandle compile(TRAPS); |
4581
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|
479 |
|
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changeset
|
480 |
// Tests if the given class is a MH adapter holder. |
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|
481 |
static bool klass_is_method_handle_adapter_holder(klassOop klass) { |
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|
482 |
return (klass == SystemDictionary::MethodHandle_klass()); |
4581
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|
483 |
} |
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|
484 |
}; |
7397 | 485 |
|
486 |
#endif // SHARE_VM_PRIMS_METHODHANDLEWALK_HPP |