Mercurial > hg > truffle
annotate src/os_cpu/windows_x86/vm/assembler_windows_x86.cpp @ 17985:4077c61b03a0
8046516: Segmentation fault in JVM (easily reproducible)
Summary: Place new nodes on the previous loop exit in reorg_offsets().
Reviewed-by: roland
author | kvn |
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date | Thu, 12 Jun 2014 10:15:43 -0700 |
parents | d02120b7a34f |
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rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1999, 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" |
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8003240: x86: move MacroAssembler into separate file
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26 #include "asm/macroAssembler.hpp" |
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27 #include "asm/macroAssembler.inline.hpp" |
1972 | 28 #include "runtime/os.hpp" |
29 #include "runtime/threadLocalStorage.hpp" | |
0 | 30 |
31 | |
32 void MacroAssembler::int3() { | |
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33 emit_int8((unsigned char)0xCC); |
0 | 34 } |
35 | |
304 | 36 #ifndef _LP64 |
0 | 37 // The current scheme to accelerate access to the thread |
38 // pointer is to store the current thread in the os_exception_wrapper | |
39 // and reference the current thread from stubs and compiled code | |
40 // via the FS register. FS[0] contains a pointer to the structured | |
41 // exception block which is actually a stack address. The first time | |
42 // we call the os exception wrapper, we calculate and store the | |
43 // offset from this exception block and use that offset here. | |
44 // | |
45 // The last mechanism we used was problematic in that the | |
46 // the offset we had hard coded in the VM kept changing as Microsoft | |
47 // evolved the OS. | |
48 // | |
49 // Warning: This mechanism assumes that we only attempt to get the | |
50 // thread when we are nested below a call wrapper. | |
51 // | |
52 // movl reg, fs:[0] Get exeception pointer | |
53 // movl reg, [reg + thread_ptr_offset] Load thread | |
54 // | |
55 void MacroAssembler::get_thread(Register thread) { | |
56 // can't use ExternalAddress because it can't take NULL | |
57 AddressLiteral null(0, relocInfo::none); | |
58 | |
59 prefix(FS_segment); | |
60 movptr(thread, null); | |
61 assert(ThreadLocalStorage::get_thread_ptr_offset() != 0, | |
62 "Thread Pointer Offset has not been initialized"); | |
63 movl(thread, Address(thread, ThreadLocalStorage::get_thread_ptr_offset())); | |
64 } | |
304 | 65 #else |
66 // call (Thread*)TlsGetValue(thread_index()); | |
67 void MacroAssembler::get_thread(Register thread) { | |
68 if (thread != rax) { | |
69 push(rax); | |
70 } | |
71 push(rdi); | |
72 push(rsi); | |
73 push(rdx); | |
74 push(rcx); | |
75 push(r8); | |
76 push(r9); | |
77 push(r10); | |
78 // XXX | |
79 mov(r10, rsp); | |
80 andq(rsp, -16); | |
81 push(r10); | |
82 push(r11); | |
83 | |
84 movl(c_rarg0, ThreadLocalStorage::thread_index()); | |
85 call(RuntimeAddress((address)TlsGetValue)); | |
86 | |
87 pop(r11); | |
88 pop(rsp); | |
89 pop(r10); | |
90 pop(r9); | |
91 pop(r8); | |
92 pop(rcx); | |
93 pop(rdx); | |
94 pop(rsi); | |
95 pop(rdi); | |
96 if (thread != rax) { | |
97 mov(thread, rax); | |
98 pop(rax); | |
99 } | |
100 } | |
101 #endif |