Mercurial > hg > truffle
annotate src/os_cpu/linux_x86/vm/assembler_linux_x86_32.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 |
---|---|
date | Wed, 06 Aug 2008 11:57:31 -0400 |
parents | 7793bd37a336 |
children | d1605aabd0a1 |
rev | line source |
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0 | 1 /* |
2 * Copyright 1999-2003 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_32.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 movl(thread, rsp); | |
34 shrl(thread, PAGE_SHIFT); | |
35 | |
36 ExternalAddress tls_base((address)ThreadLocalStorage::sp_map_addr()); | |
37 Address index(noreg, thread, Address::times_4); | |
38 ArrayAddress tls(tls_base, index); | |
39 | |
40 movptr(thread, tls); | |
41 } | |
42 | |
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
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43 bool MacroAssembler::needs_explicit_null_check(intptr_t offset) { |
0 | 44 // Linux kernel guarantees that the first page is always unmapped. Don't |
45 // assume anything more than that. | |
46 bool offset_in_first_page = 0 <= offset && offset < os::vm_page_size(); | |
47 return !offset_in_first_page; | |
48 } |