Mercurial > hg > graal-compiler
annotate src/os_cpu/linux_x86/vm/os_linux_x86.hpp @ 20147:46bb6e576335
fix unguarded reads resulting from lowering UnsafeLoadNode
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 02 Apr 2015 19:30:19 +0200 |
parents | 89152779163c |
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rev | line source |
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0 | 1 /* |
17524 | 2 * Copyright (c) 1999, 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 #ifndef OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP |
26 #define OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP | |
27 | |
0 | 28 static void setup_fpu(); |
29 static bool supports_sse(); | |
30 | |
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31 static jlong rdtsc(); |
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32 |
0 | 33 static bool is_allocatable(size_t bytes); |
34 | |
35 // Used to register dynamic code cache area with the OS | |
36 // Note: Currently only used in 64 bit Windows implementations | |
37 static bool register_code_area(char *low, char *high) { return true; } | |
1972 | 38 |
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39 /* |
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40 * Work-around for broken NX emulation using CS limit, Red Hat patch "Exec-Shield" |
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41 * (IA32 only). |
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42 * |
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43 * Map and execute at a high VA to prevent CS lazy updates race with SMP MM |
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44 * invalidation.Further code generation by the JVM will no longer cause CS limit |
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45 * updates. |
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46 * |
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47 * Affects IA32: RHEL 5 & 6, Ubuntu 10.04 (LTS), 10.10, 11.04, 11.10, 12.04. |
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48 * @see JDK-8023956 |
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49 */ |
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50 static void workaround_expand_exec_shield_cs_limit(); |
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51 |
1972 | 52 #endif // OS_CPU_LINUX_X86_VM_OS_LINUX_X86_HPP |