Mercurial > hg > truffle
annotate src/os_cpu/linux_x86/vm/assembler_linux_x86_64.cpp @ 355:0edda524b58c
6722565: G1: assert !r->is_on_unclean_list() fires
Summary: Under certain circumstances, two cleanup threads can claim and process the same region.
Reviewed-by: apetrusenko, ysr
author | tonyp |
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date | Wed, 06 Aug 2008 11:57:31 -0400 |
parents | 7793bd37a336 |
children | d1605aabd0a1 |
rev | line source |
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0 | 1 /* |
2 * Copyright 2003 Sun Microsystems, Inc. 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. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_assembler_linux_x86_64.cpp.incl" | |
27 | |
28 void MacroAssembler::int3() { | |
29 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint))); | |
30 } | |
31 | |
32 void MacroAssembler::get_thread(Register thread) { | |
33 // call pthread_getspecific | |
34 // void * pthread_getspecific(pthread_key_t key); | |
35 if (thread != rax) { | |
36 pushq(rax); | |
37 } | |
38 pushq(rdi); | |
39 pushq(rsi); | |
40 pushq(rdx); | |
41 pushq(rcx); | |
42 pushq(r8); | |
43 pushq(r9); | |
44 pushq(r10); | |
45 // XXX | |
46 movq(r10, rsp); | |
47 andq(rsp, -16); | |
48 pushq(r10); | |
49 pushq(r11); | |
50 | |
51 movl(rdi, ThreadLocalStorage::thread_index()); | |
52 call(RuntimeAddress(CAST_FROM_FN_PTR(address, pthread_getspecific))); | |
53 | |
54 popq(r11); | |
55 popq(rsp); | |
56 popq(r10); | |
57 popq(r9); | |
58 popq(r8); | |
59 popq(rcx); | |
60 popq(rdx); | |
61 popq(rsi); | |
62 popq(rdi); | |
63 if (thread != rax) { | |
64 movq(thread, rax); | |
65 popq(rax); | |
66 } | |
67 } | |
68 | |
168
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69 bool MacroAssembler::needs_explicit_null_check(intptr_t offset) { |
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70 // Exception handler checks the nmethod's implicit null checks table |
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71 // only when this method returns false. |
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72 if (UseCompressedOops) { |
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73 // The first page after heap_base is unmapped and |
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74 // the 'offset' is equal to [heap_base + offset] for |
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75 // narrow oop implicit null checks. |
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76 uintptr_t heap_base = (uintptr_t)Universe::heap_base(); |
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77 if ((uintptr_t)offset >= heap_base) { |
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78 // Normalize offset for the next check. |
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79 offset = (intptr_t)(pointer_delta((void*)offset, (void*)heap_base, 1)); |
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80 } |
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81 } |
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82 // Linux kernel guarantees that the first page is always unmapped. Don't |
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83 // assume anything more than that. |
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84 bool offset_in_first_page = 0 <= offset && offset < os::vm_page_size(); |
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85 return !offset_in_first_page; |
0 | 86 } |