Mercurial > hg > graal-jvmci-8
view src/share/vm/runtime/atomic.cpp @ 1429:abc670a709dc
* -XX:TraceC1X=0...5 controls the native c1x tracing
* -Dc1x.debug=true turns on the logging proxies and lots of log output on the java side
* provide more information about types to the compiler (type hierarchy, etc)
* provide exception handler tables to the compiler
* add exception handlers to the nmethod
* correct implementation of ExceptionObject
* exception handling/unwinding entry points
* modified versions of handle/unwind exception stubs using standard calling conventions
* exception throwing
* implicit null pointer exception, implicit div by 0 exception
* arraystore/classcast/arrayindex exceptions
* checkcast implementation
* newarray, anewarray, multinewarray implementation
* correct new instance initialization
* access to java class mirrors (for ldc)
* unresolved methods
* class resolving - class patching (asssembly prototype copying)
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Tue, 31 Aug 2010 22:13:30 -0700 |
parents | d1605aabd0a1 |
children | c18cbe5936b8 |
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/* * Copyright 2001-2008 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. * */ # include "incls/_precompiled.incl" # include "incls/_atomic.cpp.incl" jbyte Atomic::cmpxchg(jbyte exchange_value, volatile jbyte* dest, jbyte compare_value) { assert(sizeof(jbyte) == 1, "assumption."); uintptr_t dest_addr = (uintptr_t)dest; uintptr_t offset = dest_addr % sizeof(jint); volatile jint* dest_int = (volatile jint*)(dest_addr - offset); jint cur = *dest_int; jbyte* cur_as_bytes = (jbyte*)(&cur); jint new_val = cur; jbyte* new_val_as_bytes = (jbyte*)(&new_val); new_val_as_bytes[offset] = exchange_value; while (cur_as_bytes[offset] == compare_value) { jint res = cmpxchg(new_val, dest_int, cur); if (res == cur) break; cur = res; new_val = cur; new_val_as_bytes[offset] = exchange_value; } return cur_as_bytes[offset]; } unsigned Atomic::xchg(unsigned int exchange_value, volatile unsigned int* dest) { assert(sizeof(unsigned int) == sizeof(jint), "more work to do"); return (unsigned int)Atomic::xchg((jint)exchange_value, (volatile jint*)dest); } unsigned Atomic::cmpxchg(unsigned int exchange_value, volatile unsigned int* dest, unsigned int compare_value) { assert(sizeof(unsigned int) == sizeof(jint), "more work to do"); return (unsigned int)Atomic::cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); }