Mercurial > hg > graal-compiler
view src/share/vm/runtime/icache.hpp @ 7235:a6bd253a770f
expanded LOG_PRINTF stub to handle up to 3 arguments in addition to the format string
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 17 Dec 2012 11:12:01 +0100 |
parents | 1d1603768966 |
children |
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/* * Copyright (c) 1997, 2011, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_RUNTIME_ICACHE_HPP #define SHARE_VM_RUNTIME_ICACHE_HPP #include "memory/allocation.hpp" #include "runtime/stubCodeGenerator.hpp" // Interface for updating the instruction cache. Whenever the VM modifies // code, part of the processor instruction cache potentially has to be flushed. // Default implementation is in icache.cpp, and can be hidden per-platform. // Most platforms must provide only ICacheStubGenerator::generate_icache_flush(). // Platforms that don't require icache flushing can just nullify the public // members of AbstractICache in their ICache class. AbstractICache should never // be referenced other than by deriving the ICache class from it. // // The code for the ICache class and for generate_icache_flush() must be in // architecture-specific files, i.e., icache_<arch>.hpp/.cpp class AbstractICache : AllStatic { public: // The flush stub signature typedef int (*flush_icache_stub_t)(address addr, int lines, int magic); protected: // The flush stub function address static flush_icache_stub_t _flush_icache_stub; // Call the flush stub static void call_flush_stub(address start, int lines); public: enum { stub_size = 0, // Size of the icache flush stub in bytes line_size = 0, // Icache line size in bytes log2_line_size = 0 // log2(line_size) }; static void initialize(); static void invalidate_word(address addr); static void invalidate_range(address start, int nbytes); }; // Must be included before the definition of ICacheStubGenerator // because ICacheStubGenerator uses ICache definitions. #ifdef TARGET_ARCH_x86 # include "icache_x86.hpp" #endif #ifdef TARGET_ARCH_sparc # include "icache_sparc.hpp" #endif #ifdef TARGET_ARCH_zero # include "icache_zero.hpp" #endif #ifdef TARGET_ARCH_arm # include "icache_arm.hpp" #endif #ifdef TARGET_ARCH_ppc # include "icache_ppc.hpp" #endif class ICacheStubGenerator : public StubCodeGenerator { public: ICacheStubGenerator(CodeBuffer *c) : StubCodeGenerator(c) {} // Generate the icache flush stub. // // Since we cannot flush the cache when this stub is generated, // it must be generated first, and just to be sure, we do extra // work to allow a check that these instructions got executed. // // The flush stub has three parameters (see flush_icache_stub_t). // // addr - Start address, must be aligned at log2_line_size // lines - Number of line_size icache lines to flush // magic - Magic number copied to result register to make sure // the stub executed properly // // A template for generate_icache_flush is // // #define __ _masm-> // // void ICacheStubGenerator::generate_icache_flush( // ICache::flush_icache_stub_t* flush_icache_stub // ) { // StubCodeMark mark(this, "ICache", "flush_icache_stub"); // // address start = __ pc(); // // // emit flush stub asm code // // // Must be set here so StubCodeMark destructor can call the flush stub. // *flush_icache_stub = (ICache::flush_icache_stub_t)start; // }; // // #undef __ // // The first use of flush_icache_stub must apply it to itself. The // StubCodeMark destructor in generate_icache_flush will call Assembler::flush, // which in turn will call invalidate_range (see asm/assembler.cpp), which // in turn will call the flush stub *before* generate_icache_flush returns. // The usual method of having generate_icache_flush return the address of the // stub to its caller, which would then, e.g., store that address in // flush_icache_stub, won't work. generate_icache_flush must itself set // flush_icache_stub to the address of the stub it generates before // the StubCodeMark destructor is invoked. void generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub); }; #endif // SHARE_VM_RUNTIME_ICACHE_HPP