Fri, 14 Jun 2013 08:02:32 +0200
8012265: VM often crashes on solaris with a lot of memory
Summary: Increase HeapBaseMinAddress for G1 from 256m to 1g on Solaris x86
Reviewed-by: mgerdin, coleenp, kvn
1 /*
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
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23 */
25 #include "precompiled.hpp"
26 #include "runtime/atomic.hpp"
27 #ifdef TARGET_OS_FAMILY_linux
28 # include "os_linux.inline.hpp"
29 #endif
30 #ifdef TARGET_OS_FAMILY_solaris
31 # include "os_solaris.inline.hpp"
32 #endif
33 #ifdef TARGET_OS_FAMILY_windows
34 # include "os_windows.inline.hpp"
35 #endif
36 #ifdef TARGET_OS_FAMILY_bsd
37 # include "os_bsd.inline.hpp"
38 #endif
40 #include "runtime/atomic.inline.hpp"
42 jbyte Atomic::cmpxchg(jbyte exchange_value, volatile jbyte* dest, jbyte compare_value) {
43 assert(sizeof(jbyte) == 1, "assumption.");
44 uintptr_t dest_addr = (uintptr_t)dest;
45 uintptr_t offset = dest_addr % sizeof(jint);
46 volatile jint* dest_int = (volatile jint*)(dest_addr - offset);
47 jint cur = *dest_int;
48 jbyte* cur_as_bytes = (jbyte*)(&cur);
49 jint new_val = cur;
50 jbyte* new_val_as_bytes = (jbyte*)(&new_val);
51 new_val_as_bytes[offset] = exchange_value;
52 while (cur_as_bytes[offset] == compare_value) {
53 jint res = cmpxchg(new_val, dest_int, cur);
54 if (res == cur) break;
55 cur = res;
56 new_val = cur;
57 new_val_as_bytes[offset] = exchange_value;
58 }
59 return cur_as_bytes[offset];
60 }
62 unsigned Atomic::xchg(unsigned int exchange_value, volatile unsigned int* dest) {
63 assert(sizeof(unsigned int) == sizeof(jint), "more work to do");
64 return (unsigned int)Atomic::xchg((jint)exchange_value, (volatile jint*)dest);
65 }
67 unsigned Atomic::cmpxchg(unsigned int exchange_value,
68 volatile unsigned int* dest, unsigned int compare_value) {
69 assert(sizeof(unsigned int) == sizeof(jint), "more work to do");
70 return (unsigned int)Atomic::cmpxchg((jint)exchange_value, (volatile jint*)dest,
71 (jint)compare_value);
72 }
74 jlong Atomic::add(jlong add_value, volatile jlong* dest) {
75 jlong old = load(dest);
76 jlong new_value = old + add_value;
77 while (old != cmpxchg(new_value, dest, old)) {
78 old = load(dest);
79 new_value = old + add_value;
80 }
81 return old;
82 }