Mercurial > hg > CbC > CbC_gcc
annotate gcc/emutls.c @ 58:3aaf117db171
error at dwarf2out.c
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 15 Feb 2010 14:58:24 +0900 |
| parents | 58ad6c70ea60 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* TLS emulation. |
| 2 Copyright (C) 2006, 2008, 2009 Free Software Foundation, Inc. | |
| 3 Contributed by Jakub Jelinek <jakub@redhat.com>. | |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify it under | |
| 8 the terms of the GNU General Public License as published by the Free | |
| 9 Software Foundation; either version 3, or (at your option) any later | |
| 10 version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 Under Section 7 of GPL version 3, you are granted additional | |
| 18 permissions described in the GCC Runtime Library Exception, version | |
| 19 3.1, as published by the Free Software Foundation. | |
| 20 | |
| 21 You should have received a copy of the GNU General Public License and | |
| 22 a copy of the GCC Runtime Library Exception along with this program; | |
| 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 24 <http://www.gnu.org/licenses/>. */ | |
| 25 | |
| 26 #include "tconfig.h" | |
| 27 #include "tsystem.h" | |
| 28 #include "coretypes.h" | |
| 29 #include "tm.h" | |
| 30 #include "gthr.h" | |
| 31 | |
| 32 typedef unsigned int word __attribute__((mode(word))); | |
| 33 typedef unsigned int pointer __attribute__((mode(pointer))); | |
| 34 | |
| 35 struct __emutls_object | |
| 36 { | |
| 37 word size; | |
| 38 word align; | |
| 39 union { | |
| 40 pointer offset; | |
| 41 void *ptr; | |
| 42 } loc; | |
| 43 void *templ; | |
| 44 }; | |
| 45 | |
| 46 struct __emutls_array | |
| 47 { | |
| 48 pointer size; | |
| 49 void **data[]; | |
| 50 }; | |
| 51 | |
| 52 void *__emutls_get_address (struct __emutls_object *); | |
| 53 void __emutls_register_common (struct __emutls_object *, word, word, void *); | |
| 54 | |
| 55 #ifdef __GTHREADS | |
| 56 #ifdef __GTHREAD_MUTEX_INIT | |
| 57 static __gthread_mutex_t emutls_mutex = __GTHREAD_MUTEX_INIT; | |
| 58 #else | |
| 59 static __gthread_mutex_t emutls_mutex; | |
| 60 #endif | |
| 61 static __gthread_key_t emutls_key; | |
| 62 static pointer emutls_size; | |
| 63 | |
| 64 static void | |
| 65 emutls_destroy (void *ptr) | |
| 66 { | |
| 67 struct __emutls_array *arr = ptr; | |
| 68 pointer size = arr->size; | |
| 69 pointer i; | |
| 70 | |
| 71 for (i = 0; i < size; ++i) | |
| 72 { | |
| 73 if (arr->data[i]) | |
| 74 free (arr->data[i][-1]); | |
| 75 } | |
| 76 | |
| 77 free (ptr); | |
| 78 } | |
| 79 | |
| 80 static void | |
| 81 emutls_init (void) | |
| 82 { | |
| 83 #ifndef __GTHREAD_MUTEX_INIT | |
| 84 __GTHREAD_MUTEX_INIT_FUNCTION (&emutls_mutex); | |
| 85 #endif | |
| 86 if (__gthread_key_create (&emutls_key, emutls_destroy) != 0) | |
| 87 abort (); | |
| 88 } | |
| 89 #endif | |
| 90 | |
| 91 static void * | |
| 92 emutls_alloc (struct __emutls_object *obj) | |
| 93 { | |
| 94 void *ptr; | |
| 95 void *ret; | |
| 96 | |
| 97 /* We could use here posix_memalign if available and adjust | |
| 98 emutls_destroy accordingly. */ | |
| 99 if (obj->align <= sizeof (void *)) | |
| 100 { | |
| 101 ptr = malloc (obj->size + sizeof (void *)); | |
| 102 if (ptr == NULL) | |
| 103 abort (); | |
| 104 ((void **) ptr)[0] = ptr; | |
| 105 ret = ptr + sizeof (void *); | |
| 106 } | |
| 107 else | |
| 108 { | |
| 109 ptr = malloc (obj->size + sizeof (void *) + obj->align - 1); | |
| 110 if (ptr == NULL) | |
| 111 abort (); | |
| 112 ret = (void *) (((pointer) (ptr + sizeof (void *) + obj->align - 1)) | |
| 113 & ~(pointer)(obj->align - 1)); | |
| 114 ((void **) ret)[-1] = ptr; | |
| 115 } | |
| 116 | |
| 117 if (obj->templ) | |
| 118 memcpy (ret, obj->templ, obj->size); | |
| 119 else | |
| 120 memset (ret, 0, obj->size); | |
| 121 | |
| 122 return ret; | |
| 123 } | |
| 124 | |
| 125 void * | |
| 126 __emutls_get_address (struct __emutls_object *obj) | |
| 127 { | |
| 128 if (! __gthread_active_p ()) | |
| 129 { | |
| 130 if (__builtin_expect (obj->loc.ptr == NULL, 0)) | |
| 131 obj->loc.ptr = emutls_alloc (obj); | |
| 132 return obj->loc.ptr; | |
| 133 } | |
| 134 | |
| 135 #ifndef __GTHREADS | |
| 136 abort (); | |
| 137 #else | |
| 138 pointer offset = obj->loc.offset; | |
| 139 | |
| 140 if (__builtin_expect (offset == 0, 0)) | |
| 141 { | |
| 142 static __gthread_once_t once = __GTHREAD_ONCE_INIT; | |
| 143 __gthread_once (&once, emutls_init); | |
| 144 __gthread_mutex_lock (&emutls_mutex); | |
| 145 offset = obj->loc.offset; | |
| 146 if (offset == 0) | |
| 147 { | |
| 148 offset = ++emutls_size; | |
| 149 obj->loc.offset = offset; | |
| 150 } | |
| 151 __gthread_mutex_unlock (&emutls_mutex); | |
| 152 } | |
| 153 | |
| 154 struct __emutls_array *arr = __gthread_getspecific (emutls_key); | |
| 155 if (__builtin_expect (arr == NULL, 0)) | |
| 156 { | |
| 157 pointer size = offset + 32; | |
|
19
58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
kent@firefly.cr.ie.u-ryukyu.ac.jp
parents:
0
diff
changeset
|
158 arr = calloc (size + 1, sizeof (void *)); |
| 0 | 159 if (arr == NULL) |
| 160 abort (); | |
| 161 arr->size = size; | |
| 162 __gthread_setspecific (emutls_key, (void *) arr); | |
| 163 } | |
|
19
58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
kent@firefly.cr.ie.u-ryukyu.ac.jp
parents:
0
diff
changeset
|
164 else if (__builtin_expect (offset > arr->size, 0)) |
| 0 | 165 { |
| 166 pointer orig_size = arr->size; | |
| 167 pointer size = orig_size * 2; | |
|
19
58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
kent@firefly.cr.ie.u-ryukyu.ac.jp
parents:
0
diff
changeset
|
168 if (offset > size) |
| 0 | 169 size = offset + 32; |
|
19
58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
kent@firefly.cr.ie.u-ryukyu.ac.jp
parents:
0
diff
changeset
|
170 arr = realloc (arr, (size + 1) * sizeof (void *)); |
| 0 | 171 if (arr == NULL) |
| 172 abort (); | |
| 173 arr->size = size; | |
|
19
58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
kent@firefly.cr.ie.u-ryukyu.ac.jp
parents:
0
diff
changeset
|
174 memset (arr->data + orig_size, 0, |
| 0 | 175 (size - orig_size) * sizeof (void *)); |
| 176 __gthread_setspecific (emutls_key, (void *) arr); | |
| 177 } | |
| 178 | |
| 179 void *ret = arr->data[offset - 1]; | |
| 180 if (__builtin_expect (ret == NULL, 0)) | |
| 181 { | |
| 182 ret = emutls_alloc (obj); | |
| 183 arr->data[offset - 1] = ret; | |
| 184 } | |
| 185 return ret; | |
| 186 #endif | |
| 187 } | |
| 188 | |
| 189 void | |
| 190 __emutls_register_common (struct __emutls_object *obj, | |
| 191 word size, word align, void *templ) | |
| 192 { | |
| 193 if (obj->size < size) | |
| 194 { | |
| 195 obj->size = size; | |
| 196 obj->templ = NULL; | |
| 197 } | |
| 198 if (obj->align < align) | |
| 199 obj->align = align; | |
| 200 if (templ && size == obj->size) | |
| 201 obj->templ = templ; | |
| 202 } |