Mercurial > hg > graal-compiler
diff src/share/vm/code/icBuffer.hpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/code/icBuffer.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,128 @@ +/* + * Copyright 1997-2003 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// +// For CompiledIC's: +// +// In cases where we do not have MT-safe state transformation, +// we go to a transition state, using ICStubs. At a safepoint, +// the inline caches are transferred from the transitional code: +// +// instruction_address --> 01 set xxx_oop, Ginline_cache_klass +// 23 jump_to Gtemp, yyyy +// 4 nop + +class ICStub: public Stub { + private: + int _size; // total size of the stub incl. code + address _ic_site; // points at call instruction of owning ic-buffer + /* stub code follows here */ + protected: + friend class ICStubInterface; + // This will be called only by ICStubInterface + void initialize(int size) { _size = size; _ic_site = NULL; } + void finalize(); // called when a method is removed + + // General info + int size() const { return _size; } + static int code_size_to_size(int code_size) { return round_to(sizeof(ICStub), CodeEntryAlignment) + code_size; } + + public: + // Creation + void set_stub(CompiledIC *ic, oop cached_value, address dest_addr); + + // Code info + address code_begin() const { return (address)this + round_to(sizeof(ICStub), CodeEntryAlignment); } + address code_end() const { return (address)this + size(); } + + // Call site info + address ic_site() const { return _ic_site; } + void clear(); + bool is_empty() const { return _ic_site == NULL; } + + // stub info + address destination() const; // destination of jump instruction + oop cached_oop() const; // cached_oop for stub + + // Debugging + void verify() PRODUCT_RETURN; + void print() PRODUCT_RETURN; + + // Creation + friend ICStub* ICStub_from_destination_address(address destination_address); +}; + +// ICStub Creation +inline ICStub* ICStub_from_destination_address(address destination_address) { + ICStub* stub = (ICStub*) (destination_address - round_to(sizeof(ICStub), CodeEntryAlignment)); + #ifdef ASSERT + stub->verify(); + #endif + return stub; +} + +class InlineCacheBuffer: public AllStatic { + private: + // friends + friend class ICStub; + + static int ic_stub_code_size(); + + static StubQueue* _buffer; + static ICStub* _next_stub; + + static StubQueue* buffer() { return _buffer; } + static void set_next_stub(ICStub* next_stub) { _next_stub = next_stub; } + static ICStub* get_next_stub() { return _next_stub; } + + static void init_next_stub(); + + static ICStub* new_ic_stub(); + + + // Machine-dependent implementation of ICBuffer + static void assemble_ic_buffer_code(address code_begin, oop cached_oop, address entry_point); + static address ic_buffer_entry_point (address code_begin); + static oop ic_buffer_cached_oop (address code_begin); + + public: + + // Initialization; must be called before first usage + static void initialize(); + + // Access + static bool contains(address instruction_address); + + // removes the ICStubs after backpatching + static void update_inline_caches(); + + // for debugging + static bool is_empty(); + + + // New interface + static void create_transition_stub(CompiledIC *ic, oop cached_oop, address entry); + static address ic_destination_for(CompiledIC *ic); + static oop cached_oop_for(CompiledIC *ic); +};