Mercurial > hg > truffle
annotate src/share/vm/runtime/atomic.cpp @ 17511:2185d483f5f8
8032566: Crash in JIT when running Scala compiler (and compiling Scala std lib)
Summary: Switch off EliminateAutoBox flag by default in jdk8 release.
Reviewed-by: iveresov
author | kvn |
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date | Mon, 27 Jan 2014 10:20:51 -0800 |
parents | 55fb97c4c58d |
children | abec000618bf |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2001, 2013, 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 } |
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83 |
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84 void Atomic::inc(volatile short* dest) { |
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85 // Most platforms do not support atomic increment on a 2-byte value. However, |
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86 // if the value occupies the most significant 16 bits of an aligned 32-bit |
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87 // word, then we can do this with an atomic add of 0x10000 to the 32-bit word. |
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88 // |
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89 // The least significant parts of this 32-bit word will never be affected, even |
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90 // in case of overflow/underflow. |
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91 // |
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92 // Use the ATOMIC_SHORT_PAIR macro to get the desired alignment. |
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93 #ifdef VM_LITTLE_ENDIAN |
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94 assert((intx(dest) & 0x03) == 0x02, "wrong alignment"); |
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95 (void)Atomic::add(0x10000, (volatile int*)(dest-1)); |
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96 #else |
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97 assert((intx(dest) & 0x03) == 0x00, "wrong alignment"); |
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98 (void)Atomic::add(0x10000, (volatile int*)(dest)); |
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99 #endif |
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100 } |
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101 |
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102 void Atomic::dec(volatile short* dest) { |
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103 #ifdef VM_LITTLE_ENDIAN |
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104 assert((intx(dest) & 0x03) == 0x02, "wrong alignment"); |
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105 (void)Atomic::add(-0x10000, (volatile int*)(dest-1)); |
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106 #else |
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107 assert((intx(dest) & 0x03) == 0x00, "wrong alignment"); |
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108 (void)Atomic::add(-0x10000, (volatile int*)(dest)); |
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109 #endif |
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110 } |
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111 |