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comparison src/os_cpu/solaris_x86/vm/threadLS_solaris_x86.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1998-2007 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 // Processor dependent parts of ThreadLocalStorage
26
27 private:
28 static Thread* _get_thread_cache[]; // index by [(raw_id>>9)^(raw_id>>20) % _pd_cache_size]
29 static Thread* get_thread_via_cache_slowly(uintptr_t raw_id, int index);
30
31 NOT_PRODUCT(static int _tcacheHit;)
32 NOT_PRODUCT(static int _tcacheMiss;)
33
34 public:
35 // Cache hit/miss statistics
36 static void print_statistics() PRODUCT_RETURN;
37
38 enum Constants {
39 #ifdef AMD64
40 _pd_cache_size = 256*2 // projected typical # of threads * 2
41 #else
42 _pd_cache_size = 128*2 // projected typical # of threads * 2
43 #endif // AMD64
44 };
45
46 enum pd_tlsAccessMode {
47 pd_tlsAccessUndefined = -1,
48 pd_tlsAccessSlow = 0,
49 pd_tlsAccessIndirect = 1,
50 pd_tlsAccessDirect = 2
51 } ;
52
53 static void set_thread_in_slot (Thread *) ;
54
55 static pd_tlsAccessMode pd_getTlsAccessMode () ;
56 static ptrdiff_t pd_getTlsOffset () ;
57
58 static uintptr_t pd_raw_thread_id() {
59 #ifdef _GNU_SOURCE
60 #ifdef AMD64
61 uintptr_t rv;
62 __asm__ __volatile__ ("movq %%fs:0, %0" : "=r"(rv));
63 return rv;
64 #else
65 return gs_thread();
66 #endif // AMD64
67 #else //_GNU_SOURCE
68 return _raw_thread_id();
69 #endif //_GNU_SOURCE
70 }
71
72 static int pd_cache_index(uintptr_t raw_id) {
73 // Copied from the sparc version. Dave said it should also work fine
74 // for solx86.
75 int ix = (int) (((raw_id >> 9) ^ (raw_id >> 20)) % _pd_cache_size);
76 return ix;
77 }
78
79 // Java Thread
80 static inline Thread* thread();