Mercurial > hg > graal-jvmci-8
view src/share/vm/runtime/atomic.cpp @ 25:c5cbd367e4d1
6621094: PrintOptoAssembly is broken for oops information in DebugInfo
Summary: OopMapValue and VMRegImpl classes miss the virtual method print_on(st).
Reviewed-by: rasbold, jrose, never
author | kvn |
---|---|
date | Wed, 20 Feb 2008 17:23:43 -0800 |
parents | a61af66fc99e |
children | ba764ed4b6f2 |
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/* * Copyright 2001-2003 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. * */ # 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]; }