Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/atomic.cpp @ 10292:acac2b03a07f
8014765: VM exits if MaxTenuringThreshold is set below the default InitialTenuringThreshold, and InitialTenuringThreshold is not set
Summary: The VM exits when the condition in the subject line applies. The fix sets InitialTenuringThreshold to MaxTenuringThreshold if it is larger than MaxTenuringThreshold and InitialTenuringThreshold has not been set (is default).
Reviewed-by: jwilhelm, jmasa, brutisso, johnc
author | tschatzl |
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date | Thu, 16 May 2013 23:51:51 +0200 |
parents | cd3d6a6b95d9 |
children | d9eed26d638a |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 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 | |
3960 | 36 #ifdef TARGET_OS_FAMILY_bsd |
37 # include "os_bsd.inline.hpp" | |
38 #endif | |
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39 |
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40 #include "runtime/atomic.inline.hpp" |
0 | 41 |
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 } | |
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61 |
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62 unsigned Atomic::xchg(unsigned int exchange_value, volatile unsigned int* dest) { |
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63 assert(sizeof(unsigned int) == sizeof(jint), "more work to do"); |
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64 return (unsigned int)Atomic::xchg((jint)exchange_value, (volatile jint*)dest); |
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65 } |
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66 |
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67 unsigned Atomic::cmpxchg(unsigned int exchange_value, |
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68 volatile unsigned int* dest, unsigned int compare_value) { |
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69 assert(sizeof(unsigned int) == sizeof(jint), "more work to do"); |
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70 return (unsigned int)Atomic::cmpxchg((jint)exchange_value, (volatile jint*)dest, |
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71 (jint)compare_value); |
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72 } |
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73 |
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74 jlong Atomic::add(jlong add_value, volatile jlong* dest) { |
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75 jlong old = load(dest); |
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76 jlong new_value = old + add_value; |
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77 while (old != cmpxchg(new_value, dest, old)) { |
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78 old = load(dest); |
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79 new_value = old + add_value; |
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80 } |
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81 return old; |
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82 } |