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annotate src/os_cpu/linux_x86/vm/threadLS_linux_x86.hpp @ 13610:6537a75007e3
consider register priority in rematerialization decision
author | Erik Eckstein <erik.eckstein@oracle.com> |
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date | Mon, 13 Jan 2014 11:28:25 +0100 |
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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 #ifndef OS_CPU_LINUX_X86_VM_THREADLS_LINUX_X86_HPP |
26 #define OS_CPU_LINUX_X86_VM_THREADLS_LINUX_X86_HPP | |
27 | |
0 | 28 // Processor dependent parts of ThreadLocalStorage |
29 | |
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30 #if !defined(AMD64) && !defined(MINIMIZE_RAM_USAGE) |
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31 |
0 | 32 // map stack pointer to thread pointer - see notes in threadLS_linux_x86.cpp |
33 #define SP_BITLENGTH 32 | |
34 #define PAGE_SHIFT 12 | |
35 #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
36 static Thread* _sp_map[1UL << (SP_BITLENGTH - PAGE_SHIFT)]; | |
37 | |
38 public: | |
39 | |
40 static Thread** sp_map_addr() { return _sp_map; } | |
41 | |
42 static Thread* thread() { | |
43 uintptr_t sp; | |
44 __asm__ volatile ("movl %%esp, %0" : "=r" (sp)); | |
45 return _sp_map[sp >> PAGE_SHIFT]; | |
46 } | |
1972 | 47 |
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48 #else |
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49 |
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50 public: |
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51 |
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52 static Thread* thread() { |
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53 return (Thread*) os::thread_local_storage_at(thread_index()); |
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54 } |
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55 |
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56 #endif // AMD64 || MINIMIZE_RAM_USAGE |
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57 |
1972 | 58 #endif // OS_CPU_LINUX_X86_VM_THREADLS_LINUX_X86_HPP |