1 /* 2 * Copyright (c) 1998, 2007, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * 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();