sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- A replacement for the standard libpthread.so. ---*/ |
| 4 | /*--- vg_libpthread.c ---*/ |
| 5 | /*--------------------------------------------------------------------*/ |
| 6 | |
| 7 | /* |
njn | c953984 | 2002-10-02 13:26:35 +0000 | [diff] [blame] | 8 | This file is part of Valgrind, an extensible x86 protected-mode |
| 9 | emulator for monitoring program execution on x86-Unixes. |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 10 | |
njn | 0e1b514 | 2003-04-15 14:58:06 +0000 | [diff] [blame] | 11 | Copyright (C) 2000-2003 Julian Seward |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 12 | jseward@acm.org |
| 13 | |
| 14 | This program is free software; you can redistribute it and/or |
| 15 | modify it under the terms of the GNU General Public License as |
| 16 | published by the Free Software Foundation; either version 2 of the |
| 17 | License, or (at your option) any later version. |
| 18 | |
| 19 | This program is distributed in the hope that it will be useful, but |
| 20 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 | General Public License for more details. |
| 23 | |
| 24 | You should have received a copy of the GNU General Public License |
| 25 | along with this program; if not, write to the Free Software |
| 26 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 27 | 02111-1307, USA. |
| 28 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 29 | The GNU General Public License is contained in the file COPYING. |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 30 | */ |
| 31 | |
| 32 | /* ALL THIS CODE RUNS ON THE SIMULATED CPU. |
| 33 | |
| 34 | This is a replacement for the standard libpthread.so. It is loaded |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 35 | as part of the client's image (if required) and directs pthread |
| 36 | calls through to Valgrind's request mechanism. |
| 37 | |
| 38 | A couple of caveats. |
| 39 | |
| 40 | 1. Since it's a binary-compatible replacement for an existing library, |
| 41 | we must take care to used exactly the same data layouts, etc, as |
| 42 | the standard pthread.so does. |
| 43 | |
| 44 | 2. Since this runs as part of the client, there are no specific |
| 45 | restrictions on what headers etc we can include, so long as |
| 46 | this libpthread.so does not end up having dependencies on .so's |
| 47 | which the real one doesn't. |
| 48 | |
| 49 | Later ... it appears we cannot call file-related stuff in libc here, |
| 50 | perhaps fair enough. Be careful what you call from here. Even exit() |
| 51 | doesn't work (gives infinite recursion and then stack overflow); hence |
| 52 | myexit(). Also fprintf doesn't seem safe. |
| 53 | */ |
| 54 | |
| 55 | #include "valgrind.h" /* For the request-passing mechanism */ |
| 56 | #include "vg_include.h" /* For the VG_USERREQ__* constants */ |
| 57 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 58 | #define __USE_UNIX98 |
| 59 | #include <sys/types.h> |
| 60 | #include <pthread.h> |
| 61 | #undef __USE_UNIX98 |
| 62 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 63 | #include <unistd.h> |
| 64 | #include <string.h> |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 65 | #include <sys/time.h> |
sewardj | f912dfc | 2002-11-13 21:51:10 +0000 | [diff] [blame] | 66 | #include <sys/stat.h> |
| 67 | #include <sys/poll.h> |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 68 | #include <stdio.h> |
daywalker | 005e7c1 | 2003-10-16 16:14:13 +0000 | [diff] [blame] | 69 | #include <errno.h> |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 70 | |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 71 | |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 72 | # define strong_alias(name, aliasname) \ |
| 73 | extern __typeof (name) aliasname __attribute__ ((alias (#name))); |
| 74 | |
| 75 | # define weak_alias(name, aliasname) \ |
| 76 | extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))); |
| 77 | |
| 78 | |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 79 | /* --------------------------------------------------------------------- |
| 80 | Forwardses. |
| 81 | ------------------------------------------------------------------ */ |
| 82 | |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 83 | #define WEAK __attribute__((weak)) |
| 84 | |
sewardj | fd7747b | 2002-12-01 10:25:53 +0000 | [diff] [blame] | 85 | static |
| 86 | __inline__ |
| 87 | int is_kerror ( int res ) |
| 88 | { |
| 89 | if (res >= -4095 && res <= -1) |
| 90 | return 1; |
| 91 | else |
| 92 | return 0; |
| 93 | } |
| 94 | |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame] | 95 | |
| 96 | #ifdef GLIBC_2_3 |
| 97 | /* kludge by JRS (not from glibc) ... */ |
| 98 | typedef void* __locale_t; |
| 99 | |
| 100 | /* Copied from locale/locale.h in glibc-2.2.93 sources */ |
| 101 | /* This value can be passed to `uselocale' and may be returned by |
| 102 | it. Passing this value to any other function has undefined |
| 103 | behavior. */ |
| 104 | # define LC_GLOBAL_LOCALE ((__locale_t) -1L) |
| 105 | extern __locale_t __uselocale ( __locale_t ); |
| 106 | #endif |
| 107 | |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 108 | static |
| 109 | void init_libc_tsd_keys ( void ); |
| 110 | |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 111 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 112 | /* --------------------------------------------------------------------- |
| 113 | Helpers. We have to be pretty self-sufficient. |
| 114 | ------------------------------------------------------------------ */ |
| 115 | |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 116 | /* Number of times any given error message is printed. */ |
| 117 | #define N_MOANS 3 |
| 118 | |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 119 | /* Extract from Valgrind the value of VG_(clo_trace_pthread_level). |
| 120 | Returns 0 (none) if not running on Valgrind. */ |
| 121 | static |
| 122 | int get_pt_trace_level ( void ) |
| 123 | { |
| 124 | int res; |
| 125 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 126 | VG_USERREQ__GET_PTHREAD_TRACE_LEVEL, |
| 127 | 0, 0, 0, 0); |
| 128 | return res; |
| 129 | } |
| 130 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 131 | static |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 132 | void my_exit ( int arg ) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 133 | { |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 134 | VG_(do_syscall)(__NR_exit, arg); |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame] | 135 | /*NOTREACHED*/ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 136 | } |
| 137 | |
sewardj | e0cfe2a | 2002-11-30 14:04:45 +0000 | [diff] [blame] | 138 | /* Apparently unused. |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame] | 139 | static |
| 140 | void my_write ( int fd, const void *buf, int count ) |
| 141 | { |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 142 | VG_(do_syscall)(__NR_write, fd, (int)buf, count ); |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame] | 143 | } |
sewardj | e0cfe2a | 2002-11-30 14:04:45 +0000 | [diff] [blame] | 144 | */ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 145 | |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 146 | /* We need this guy -- it's in valgrind.so. */ |
| 147 | extern void VG_(startup) ( void ); |
| 148 | |
| 149 | |
| 150 | /* Just start up Valgrind if it's not already going. VG_(startup)() |
| 151 | detects and ignores second and subsequent calls. */ |
sewardj | 604ec3c | 2002-04-18 22:38:41 +0000 | [diff] [blame] | 152 | static __inline__ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 153 | void ensure_valgrind ( char* caller ) |
| 154 | { |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 155 | VG_(startup)(); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 156 | } |
| 157 | |
sewardj | bea1caa | 2002-05-10 23:20:58 +0000 | [diff] [blame] | 158 | /* While we're at it ... hook our own startup function into this |
| 159 | game. */ |
| 160 | __asm__ ( |
| 161 | ".section .init\n" |
| 162 | "\tcall vgPlain_startup" |
| 163 | ); |
| 164 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 165 | |
| 166 | static |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 167 | __attribute__((noreturn)) |
daywalker | 3222e0a | 2003-09-18 01:39:50 +0000 | [diff] [blame] | 168 | void barf ( const char* str ) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 169 | { |
sewardj | 69a72a5 | 2002-11-03 13:41:41 +0000 | [diff] [blame] | 170 | char buf[1000]; |
daywalker | 3222e0a | 2003-09-18 01:39:50 +0000 | [diff] [blame] | 171 | strcpy(buf, "\nvalgrind's libpthread.so: "); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 172 | strcat(buf, str); |
| 173 | strcat(buf, "\n\n"); |
njn | 4c79121 | 2003-05-02 17:53:54 +0000 | [diff] [blame] | 174 | VALGRIND_NON_SIMD_CALL2(VG_(message), Vg_UserMsg, buf); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 175 | my_exit(1); |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 176 | /* We have to persuade gcc into believing this doesn't return. */ |
| 177 | while (1) { }; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 181 | static void cat_n_send ( char* s1, char* s2, char* s3 ) |
sewardj | 2a3d28c | 2002-04-14 13:27:00 +0000 | [diff] [blame] | 182 | { |
sewardj | 69a72a5 | 2002-11-03 13:41:41 +0000 | [diff] [blame] | 183 | char buf[1000]; |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 184 | if (get_pt_trace_level() >= 0) { |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 185 | snprintf(buf, sizeof(buf), "%s%s%s", s1, s2, s3); |
sewardj | 69a72a5 | 2002-11-03 13:41:41 +0000 | [diff] [blame] | 186 | buf[sizeof(buf)-1] = '\0'; |
njn | 4c79121 | 2003-05-02 17:53:54 +0000 | [diff] [blame] | 187 | VALGRIND_NON_SIMD_CALL2(VG_(message), Vg_UserMsg, buf); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 188 | } |
sewardj | 2a3d28c | 2002-04-14 13:27:00 +0000 | [diff] [blame] | 189 | } |
| 190 | |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 191 | static void oh_dear ( char* fn, char* aux, char* s ) |
sewardj | 69a72a5 | 2002-11-03 13:41:41 +0000 | [diff] [blame] | 192 | { |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 193 | cat_n_send ( "warning: Valgrind's ", fn, s ); |
| 194 | if (NULL != aux) |
| 195 | cat_n_send ( " ", aux, "" ); |
| 196 | cat_n_send ( " your program may misbehave as a result", "", "" ); |
sewardj | 69a72a5 | 2002-11-03 13:41:41 +0000 | [diff] [blame] | 197 | } |
| 198 | |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 199 | static void ignored ( char* fn, char* aux ) |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 200 | { |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 201 | oh_dear ( fn, aux, " does nothing" ); |
| 202 | } |
| 203 | |
| 204 | static void kludged ( char* fn, char* aux ) |
| 205 | { |
| 206 | oh_dear ( fn, aux, " is incomplete" ); |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 207 | } |
| 208 | |
sewardj | 69a72a5 | 2002-11-03 13:41:41 +0000 | [diff] [blame] | 209 | |
sewardj | ccef2e6 | 2002-05-29 19:26:32 +0000 | [diff] [blame] | 210 | __attribute__((noreturn)) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 211 | void vgPlain_unimp ( char* fn ) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 212 | { |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 213 | cat_n_send ( "valgrind's libpthread.so: UNIMPLEMENTED FUNCTION: ", fn, "" ); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 214 | barf("Please report this bug to me at: jseward@acm.org"); |
| 215 | } |
| 216 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 217 | |
sewardj | 457cc47 | 2002-06-03 23:13:47 +0000 | [diff] [blame] | 218 | static |
daywalker | 3222e0a | 2003-09-18 01:39:50 +0000 | [diff] [blame] | 219 | void my_assert_fail ( const Char* expr, const Char* file, Int line, const Char* fn ) |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 220 | { |
sewardj | 69a72a5 | 2002-11-03 13:41:41 +0000 | [diff] [blame] | 221 | char buf[1000]; |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 222 | static Bool entered = False; |
| 223 | if (entered) |
| 224 | my_exit(2); |
| 225 | entered = True; |
sewardj | 69a72a5 | 2002-11-03 13:41:41 +0000 | [diff] [blame] | 226 | sprintf(buf, "\n%s: %s:%d (%s): Assertion `%s' failed.\n", |
| 227 | "valgrind", file, line, fn, expr ); |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 228 | cat_n_send ( "", buf, "" ); |
| 229 | sprintf(buf, "Please report this bug to me at: %s\n\n", VG_EMAIL_ADDR); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 230 | my_exit(1); |
| 231 | } |
| 232 | |
| 233 | #define MY__STRING(__str) #__str |
| 234 | |
| 235 | #define my_assert(expr) \ |
| 236 | ((void) ((expr) ? 0 : \ |
| 237 | (my_assert_fail (MY__STRING(expr), \ |
| 238 | __FILE__, __LINE__, \ |
| 239 | __PRETTY_FUNCTION__), 0))) |
| 240 | |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 241 | static |
| 242 | void my_free ( void* ptr ) |
| 243 | { |
| 244 | int res; |
| 245 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 246 | VG_USERREQ__FREE, ptr, 0, 0, 0); |
| 247 | my_assert(res == 0); |
| 248 | } |
| 249 | |
| 250 | |
| 251 | static |
| 252 | void* my_malloc ( int nbytes ) |
| 253 | { |
| 254 | void* res; |
| 255 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 256 | VG_USERREQ__MALLOC, nbytes, 0, 0, 0); |
| 257 | my_assert(res != (void*)0); |
| 258 | return res; |
| 259 | } |
| 260 | |
| 261 | |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 262 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 263 | /* --------------------------------------------------------------------- |
| 264 | Pass pthread_ calls to Valgrind's request mechanism. |
| 265 | ------------------------------------------------------------------ */ |
| 266 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 267 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 268 | /* --------------------------------------------------- |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 269 | Ummm .. |
| 270 | ------------------------------------------------ */ |
| 271 | |
| 272 | static |
| 273 | void pthread_error ( const char* msg ) |
| 274 | { |
| 275 | int res; |
| 276 | VALGRIND_MAGIC_SEQUENCE(res, 0, |
| 277 | VG_USERREQ__PTHREAD_ERROR, |
| 278 | msg, 0, 0, 0); |
| 279 | } |
| 280 | |
| 281 | |
| 282 | /* --------------------------------------------------- |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 283 | Here so it can be inlined without complaint. |
| 284 | ------------------------------------------------ */ |
| 285 | |
| 286 | __inline__ |
| 287 | pthread_t pthread_self(void) |
| 288 | { |
| 289 | int tid; |
| 290 | ensure_valgrind("pthread_self"); |
| 291 | VALGRIND_MAGIC_SEQUENCE(tid, 0 /* default */, |
| 292 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 293 | 0, 0, 0, 0); |
| 294 | if (tid < 1 || tid >= VG_N_THREADS) |
| 295 | barf("pthread_self: invalid ThreadId"); |
| 296 | return tid; |
| 297 | } |
| 298 | |
| 299 | |
| 300 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 301 | THREAD ATTRIBUTES |
| 302 | ------------------------------------------------ */ |
| 303 | |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 304 | int pthread_attr_init(pthread_attr_t *attr) |
| 305 | { |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 306 | /* Just initialise the fields which we might look at. */ |
| 307 | attr->__detachstate = PTHREAD_CREATE_JOINABLE; |
sewardj | 111b14c | 2002-10-20 16:22:57 +0000 | [diff] [blame] | 308 | /* Linuxthreads sets this field to the value __getpagesize(), so I |
| 309 | guess the following is OK. */ |
| 310 | attr->__guardsize = VKI_BYTES_PER_PAGE; return 0; |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate) |
| 314 | { |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 315 | if (detachstate != PTHREAD_CREATE_JOINABLE |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 316 | && detachstate != PTHREAD_CREATE_DETACHED) { |
| 317 | pthread_error("pthread_attr_setdetachstate: " |
| 318 | "detachstate is invalid"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 319 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 320 | } |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 321 | attr->__detachstate = detachstate; |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 322 | return 0; |
| 323 | } |
| 324 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 325 | int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate) |
| 326 | { |
| 327 | *detachstate = attr->__detachstate; |
| 328 | return 0; |
| 329 | } |
| 330 | |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 331 | int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit) |
| 332 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 333 | static int moans = N_MOANS; |
| 334 | if (moans-- > 0) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 335 | ignored("pthread_attr_setinheritsched", NULL); |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 336 | return 0; |
| 337 | } |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 338 | |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 339 | WEAK |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 340 | int pthread_attr_setstacksize (pthread_attr_t *__attr, |
| 341 | size_t __stacksize) |
| 342 | { |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 343 | size_t limit; |
sewardj | 3d7c8d6 | 2002-06-04 20:59:16 +0000 | [diff] [blame] | 344 | char buf[1024]; |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 345 | ensure_valgrind("pthread_attr_setstacksize"); |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 346 | limit = VG_PTHREAD_STACK_SIZE - VG_AR_CLIENT_STACKBASE_REDZONE_SZB |
| 347 | - 1000; /* paranoia */ |
| 348 | if (__stacksize < limit) |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 349 | return 0; |
sewardj | 3d7c8d6 | 2002-06-04 20:59:16 +0000 | [diff] [blame] | 350 | snprintf(buf, sizeof(buf), "pthread_attr_setstacksize: " |
| 351 | "requested size %d >= VG_PTHREAD_STACK_SIZE\n " |
| 352 | "edit vg_include.h and rebuild.", __stacksize); |
| 353 | buf[sizeof(buf)-1] = '\0'; /* Make sure it is zero terminated */ |
| 354 | barf(buf); |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 355 | } |
| 356 | |
| 357 | |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 358 | /* This is completely bogus. */ |
| 359 | int pthread_attr_getschedparam(const pthread_attr_t *attr, |
| 360 | struct sched_param *param) |
| 361 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 362 | static int moans = N_MOANS; |
| 363 | if (moans-- > 0) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 364 | kludged("pthread_attr_getschedparam", NULL); |
sewardj | 3e909ce | 2002-06-03 13:27:15 +0000 | [diff] [blame] | 365 | # ifdef HAVE_SCHED_PRIORITY |
sewardj | 72d5848 | 2002-04-24 02:20:20 +0000 | [diff] [blame] | 366 | if (param) param->sched_priority = 0; /* who knows */ |
| 367 | # else |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 368 | if (param) param->__sched_priority = 0; /* who knows */ |
sewardj | 72d5848 | 2002-04-24 02:20:20 +0000 | [diff] [blame] | 369 | # endif |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 370 | return 0; |
| 371 | } |
| 372 | |
| 373 | int pthread_attr_setschedparam(pthread_attr_t *attr, |
| 374 | const struct sched_param *param) |
| 375 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 376 | static int moans = N_MOANS; |
| 377 | if (moans-- > 0) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 378 | ignored("pthread_attr_setschedparam", "(scheduling not changeable)"); |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | int pthread_attr_destroy(pthread_attr_t *attr) |
| 383 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 384 | static int moans = N_MOANS; |
| 385 | if (moans-- > 0) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 386 | ignored("pthread_attr_destroy", NULL); |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 387 | return 0; |
| 388 | } |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 389 | |
sewardj | 0d84423 | 2002-06-02 09:29:31 +0000 | [diff] [blame] | 390 | /* These are no-ops, as with LinuxThreads. */ |
| 391 | int pthread_attr_setscope ( pthread_attr_t *attr, int scope ) |
| 392 | { |
| 393 | ensure_valgrind("pthread_attr_setscope"); |
| 394 | if (scope == PTHREAD_SCOPE_SYSTEM) |
| 395 | return 0; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 396 | pthread_error("pthread_attr_setscope: " |
| 397 | "invalid or unsupported scope"); |
sewardj | 0d84423 | 2002-06-02 09:29:31 +0000 | [diff] [blame] | 398 | if (scope == PTHREAD_SCOPE_PROCESS) |
| 399 | return ENOTSUP; |
| 400 | return EINVAL; |
| 401 | } |
| 402 | |
| 403 | int pthread_attr_getscope ( const pthread_attr_t *attr, int *scope ) |
| 404 | { |
| 405 | ensure_valgrind("pthread_attr_setscope"); |
| 406 | if (scope) |
| 407 | *scope = PTHREAD_SCOPE_SYSTEM; |
| 408 | return 0; |
| 409 | } |
| 410 | |
sewardj | 64039bb | 2002-06-03 00:58:18 +0000 | [diff] [blame] | 411 | |
| 412 | /* Pretty bogus. Avoid if possible. */ |
| 413 | int pthread_getattr_np (pthread_t thread, pthread_attr_t *attr) |
| 414 | { |
| 415 | int detached; |
| 416 | size_t limit; |
| 417 | ensure_valgrind("pthread_getattr_np"); |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 418 | kludged("pthread_getattr_np", NULL); |
sewardj | 64039bb | 2002-06-03 00:58:18 +0000 | [diff] [blame] | 419 | limit = VG_PTHREAD_STACK_SIZE - VG_AR_CLIENT_STACKBASE_REDZONE_SZB |
| 420 | - 1000; /* paranoia */ |
| 421 | attr->__detachstate = PTHREAD_CREATE_JOINABLE; |
| 422 | attr->__schedpolicy = SCHED_OTHER; |
| 423 | attr->__schedparam.sched_priority = 0; |
| 424 | attr->__inheritsched = PTHREAD_EXPLICIT_SCHED; |
| 425 | attr->__scope = PTHREAD_SCOPE_SYSTEM; |
| 426 | attr->__guardsize = VKI_BYTES_PER_PAGE; |
| 427 | attr->__stackaddr = NULL; |
| 428 | attr->__stackaddr_set = 0; |
| 429 | attr->__stacksize = limit; |
| 430 | VALGRIND_MAGIC_SEQUENCE(detached, (-1) /* default */, |
| 431 | VG_USERREQ__SET_OR_GET_DETACH, |
| 432 | 2 /* get */, thread, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 433 | my_assert(detached == 0 || detached == 1); |
sewardj | 64039bb | 2002-06-03 00:58:18 +0000 | [diff] [blame] | 434 | if (detached) |
| 435 | attr->__detachstate = PTHREAD_CREATE_DETACHED; |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | |
| 440 | /* Bogus ... */ |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 441 | WEAK |
sewardj | 64039bb | 2002-06-03 00:58:18 +0000 | [diff] [blame] | 442 | int pthread_attr_getstackaddr ( const pthread_attr_t * attr, |
| 443 | void ** stackaddr ) |
| 444 | { |
| 445 | ensure_valgrind("pthread_attr_getstackaddr"); |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 446 | kludged("pthread_attr_getstackaddr", "(it always sets stackaddr to zero)"); |
sewardj | 64039bb | 2002-06-03 00:58:18 +0000 | [diff] [blame] | 447 | if (stackaddr) |
| 448 | *stackaddr = NULL; |
| 449 | return 0; |
| 450 | } |
| 451 | |
| 452 | /* Not bogus (!) */ |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 453 | WEAK |
sewardj | 64039bb | 2002-06-03 00:58:18 +0000 | [diff] [blame] | 454 | int pthread_attr_getstacksize ( const pthread_attr_t * _attr, |
| 455 | size_t * __stacksize ) |
| 456 | { |
| 457 | size_t limit; |
| 458 | ensure_valgrind("pthread_attr_getstacksize"); |
| 459 | limit = VG_PTHREAD_STACK_SIZE - VG_AR_CLIENT_STACKBASE_REDZONE_SZB |
| 460 | - 1000; /* paranoia */ |
| 461 | if (__stacksize) |
| 462 | *__stacksize = limit; |
| 463 | return 0; |
| 464 | } |
| 465 | |
sewardj | a3be12f | 2002-06-17 12:19:44 +0000 | [diff] [blame] | 466 | int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy) |
| 467 | { |
| 468 | if (policy != SCHED_OTHER && policy != SCHED_FIFO && policy != SCHED_RR) |
| 469 | return EINVAL; |
| 470 | attr->__schedpolicy = policy; |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy) |
| 475 | { |
| 476 | *policy = attr->__schedpolicy; |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | |
sewardj | 111b14c | 2002-10-20 16:22:57 +0000 | [diff] [blame] | 481 | /* This is completely bogus. We reject all attempts to change it from |
| 482 | VKI_BYTES_PER_PAGE. I don't have a clue what it's for so it seems |
| 483 | safest to be paranoid. */ |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 484 | WEAK |
sewardj | 111b14c | 2002-10-20 16:22:57 +0000 | [diff] [blame] | 485 | int pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize) |
| 486 | { |
| 487 | static int moans = N_MOANS; |
| 488 | |
| 489 | if (guardsize == VKI_BYTES_PER_PAGE) |
| 490 | return 0; |
| 491 | |
| 492 | if (moans-- > 0) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 493 | ignored("pthread_attr_setguardsize", |
| 494 | "(it ignores any guardsize != 4096)"); |
sewardj | 111b14c | 2002-10-20 16:22:57 +0000 | [diff] [blame] | 495 | |
| 496 | return 0; |
| 497 | } |
| 498 | |
| 499 | /* A straight copy of the LinuxThreads code. */ |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 500 | WEAK |
sewardj | 111b14c | 2002-10-20 16:22:57 +0000 | [diff] [blame] | 501 | int pthread_attr_getguardsize(const pthread_attr_t *attr, size_t *guardsize) |
| 502 | { |
| 503 | *guardsize = attr->__guardsize; |
| 504 | return 0; |
| 505 | } |
| 506 | |
sewardj | ab2e123 | 2002-12-26 12:16:11 +0000 | [diff] [blame] | 507 | /* Again, like LinuxThreads. */ |
| 508 | |
| 509 | static int concurrency_current_level = 0; |
| 510 | |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 511 | WEAK |
sewardj | b34e4db | 2002-12-08 23:51:32 +0000 | [diff] [blame] | 512 | int pthread_setconcurrency(int new_level) |
| 513 | { |
| 514 | if (new_level < 0) |
| 515 | return EINVAL; |
sewardj | ab2e123 | 2002-12-26 12:16:11 +0000 | [diff] [blame] | 516 | else { |
| 517 | concurrency_current_level = new_level; |
sewardj | b34e4db | 2002-12-08 23:51:32 +0000 | [diff] [blame] | 518 | return 0; |
sewardj | ab2e123 | 2002-12-26 12:16:11 +0000 | [diff] [blame] | 519 | } |
sewardj | b34e4db | 2002-12-08 23:51:32 +0000 | [diff] [blame] | 520 | } |
| 521 | |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 522 | WEAK |
sewardj | ab2e123 | 2002-12-26 12:16:11 +0000 | [diff] [blame] | 523 | int pthread_getconcurrency(void) |
| 524 | { |
| 525 | return concurrency_current_level; |
| 526 | } |
| 527 | |
| 528 | |
sewardj | 111b14c | 2002-10-20 16:22:57 +0000 | [diff] [blame] | 529 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 530 | /* --------------------------------------------------- |
| 531 | Helper functions for running a thread |
| 532 | and for clearing up afterwards. |
| 533 | ------------------------------------------------ */ |
| 534 | |
| 535 | /* All exiting threads eventually pass through here, bearing the |
| 536 | return value, or PTHREAD_CANCELED, in ret_val. */ |
| 537 | static |
| 538 | __attribute__((noreturn)) |
| 539 | void thread_exit_wrapper ( void* ret_val ) |
| 540 | { |
sewardj | 870497a | 2002-05-29 01:06:47 +0000 | [diff] [blame] | 541 | int detached, res; |
| 542 | CleanupEntry cu; |
| 543 | pthread_key_t key; |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 544 | void** specifics_ptr; |
sewardj | 870497a | 2002-05-29 01:06:47 +0000 | [diff] [blame] | 545 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 546 | /* Run this thread's cleanup handlers. */ |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 547 | while (1) { |
| 548 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 549 | VG_USERREQ__CLEANUP_POP, |
| 550 | &cu, 0, 0, 0); |
| 551 | if (res == -1) break; /* stack empty */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 552 | my_assert(res == 0); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 553 | if (0) printf("running exit cleanup handler"); |
| 554 | cu.fn ( cu.arg ); |
| 555 | } |
| 556 | |
sewardj | 870497a | 2002-05-29 01:06:47 +0000 | [diff] [blame] | 557 | /* Run this thread's key finalizers. Really this should be run |
| 558 | PTHREAD_DESTRUCTOR_ITERATIONS times. */ |
| 559 | for (key = 0; key < VG_N_THREAD_KEYS; key++) { |
| 560 | VALGRIND_MAGIC_SEQUENCE(res, (-2) /* default */, |
| 561 | VG_USERREQ__GET_KEY_D_AND_S, |
| 562 | key, &cu, 0, 0 ); |
| 563 | if (res == 0) { |
| 564 | /* valid key */ |
| 565 | if (cu.fn && cu.arg) |
| 566 | cu.fn /* destructor for key */ |
| 567 | ( cu.arg /* specific for key for this thread */ ); |
| 568 | continue; |
| 569 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 570 | my_assert(res == -1); |
sewardj | 870497a | 2002-05-29 01:06:47 +0000 | [diff] [blame] | 571 | } |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 572 | |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 573 | /* Free up my specifics space, if any. */ |
| 574 | VALGRIND_MAGIC_SEQUENCE(specifics_ptr, 3 /* default */, |
| 575 | VG_USERREQ__PTHREAD_GETSPECIFIC_PTR, |
| 576 | pthread_self(), 0, 0, 0); |
| 577 | my_assert(specifics_ptr != (void**)3); |
| 578 | my_assert(specifics_ptr != (void**)1); /* 1 means invalid thread */ |
| 579 | if (specifics_ptr != NULL) |
| 580 | my_free(specifics_ptr); |
| 581 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 582 | /* Decide on my final disposition. */ |
| 583 | VALGRIND_MAGIC_SEQUENCE(detached, (-1) /* default */, |
| 584 | VG_USERREQ__SET_OR_GET_DETACH, |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 585 | 2 /* get */, pthread_self(), 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 586 | my_assert(detached == 0 || detached == 1); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 587 | |
| 588 | if (detached) { |
| 589 | /* Detached; I just quit right now. */ |
| 590 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 591 | VG_USERREQ__QUIT, 0, 0, 0, 0); |
| 592 | } else { |
| 593 | /* Not detached; so I wait for a joiner. */ |
| 594 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 595 | VG_USERREQ__WAIT_JOINER, ret_val, 0, 0, 0); |
| 596 | } |
| 597 | /* NOTREACHED */ |
| 598 | barf("thread_exit_wrapper: still alive?!"); |
| 599 | } |
| 600 | |
| 601 | |
| 602 | /* This function is a wrapper function for running a thread. It runs |
| 603 | the root function specified in pthread_create, and then, should the |
| 604 | root function return a value, it arranges to run the thread's |
| 605 | cleanup handlers and exit correctly. */ |
| 606 | |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 607 | /* Struct used to convey info from pthread_create to thread_wrapper. |
| 608 | Must be careful not to pass to the child thread any pointers to |
| 609 | objects which might be on the parent's stack. */ |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 610 | typedef |
| 611 | struct { |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 612 | int attr__detachstate; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 613 | void* (*root_fn) ( void* ); |
| 614 | void* arg; |
| 615 | } |
| 616 | NewThreadInfo; |
| 617 | |
| 618 | |
| 619 | /* This is passed to the VG_USERREQ__APPLY_IN_NEW_THREAD and so must |
| 620 | not return. Note that this runs in the new thread, not the |
| 621 | parent. */ |
| 622 | static |
| 623 | __attribute__((noreturn)) |
| 624 | void thread_wrapper ( NewThreadInfo* info ) |
| 625 | { |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 626 | int attr__detachstate; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 627 | void* (*root_fn) ( void* ); |
| 628 | void* arg; |
| 629 | void* ret_val; |
| 630 | |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 631 | attr__detachstate = info->attr__detachstate; |
| 632 | root_fn = info->root_fn; |
| 633 | arg = info->arg; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 634 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 635 | /* Free up the arg block that pthread_create malloced. */ |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 636 | my_free(info); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 637 | |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 638 | /* Minimally observe the attributes supplied. */ |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 639 | if (attr__detachstate != PTHREAD_CREATE_DETACHED |
| 640 | && attr__detachstate != PTHREAD_CREATE_JOINABLE) |
| 641 | pthread_error("thread_wrapper: invalid attr->__detachstate"); |
| 642 | if (attr__detachstate == PTHREAD_CREATE_DETACHED) |
| 643 | pthread_detach(pthread_self()); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 644 | |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 645 | # ifdef GLIBC_2_3 |
| 646 | /* Set this thread's locale to the global (default) locale. A hack |
| 647 | in support of glibc-2.3. This does the biz for the all new |
| 648 | threads; the root thread is done with a horrible hack in |
| 649 | init_libc_tsd_keys() below. |
| 650 | */ |
| 651 | __uselocale(LC_GLOBAL_LOCALE); |
| 652 | # endif |
| 653 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 654 | /* The root function might not return. But if it does we simply |
| 655 | move along to thread_exit_wrapper. All other ways out for the |
| 656 | thread (cancellation, or calling pthread_exit) lead there |
| 657 | too. */ |
| 658 | ret_val = root_fn(arg); |
| 659 | thread_exit_wrapper(ret_val); |
| 660 | /* NOTREACHED */ |
| 661 | } |
| 662 | |
| 663 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 664 | /* --------------------------------------------------- |
| 665 | THREADs |
| 666 | ------------------------------------------------ */ |
| 667 | |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 668 | static void __valgrind_pthread_yield ( void ) |
sewardj | ff42d1d | 2002-05-22 13:17:31 +0000 | [diff] [blame] | 669 | { |
| 670 | int res; |
| 671 | ensure_valgrind("pthread_yield"); |
| 672 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 673 | VG_USERREQ__PTHREAD_YIELD, 0, 0, 0, 0); |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | WEAK |
| 677 | int pthread_yield ( void ) |
| 678 | { |
| 679 | __valgrind_pthread_yield(); |
sewardj | ff42d1d | 2002-05-22 13:17:31 +0000 | [diff] [blame] | 680 | return 0; |
| 681 | } |
| 682 | |
| 683 | |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 684 | int pthread_equal(pthread_t thread1, pthread_t thread2) |
| 685 | { |
| 686 | return thread1 == thread2 ? 1 : 0; |
| 687 | } |
| 688 | |
| 689 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 690 | /* Bundle up the args into a malloc'd block and create a new thread |
| 691 | consisting of thread_wrapper() applied to said malloc'd block. */ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 692 | int |
sewardj | 1462c8b | 2002-07-24 09:41:52 +0000 | [diff] [blame] | 693 | pthread_create (pthread_t *__restrict __thredd, |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 694 | __const pthread_attr_t *__restrict __attr, |
| 695 | void *(*__start_routine) (void *), |
| 696 | void *__restrict __arg) |
| 697 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 698 | int tid_child; |
| 699 | NewThreadInfo* info; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 700 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 701 | ensure_valgrind("pthread_create"); |
| 702 | |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 703 | /* make sure the tsd keys, and hence locale info, are initialised |
| 704 | before we get into complications making new threads. */ |
| 705 | init_libc_tsd_keys(); |
| 706 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 707 | /* Allocate space for the arg block. thread_wrapper will free |
| 708 | it. */ |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 709 | info = my_malloc(sizeof(NewThreadInfo)); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 710 | my_assert(info != NULL); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 711 | |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 712 | if (__attr) |
| 713 | info->attr__detachstate = __attr->__detachstate; |
| 714 | else |
| 715 | info->attr__detachstate = PTHREAD_CREATE_JOINABLE; |
| 716 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 717 | info->root_fn = __start_routine; |
| 718 | info->arg = __arg; |
| 719 | VALGRIND_MAGIC_SEQUENCE(tid_child, VG_INVALID_THREADID /* default */, |
| 720 | VG_USERREQ__APPLY_IN_NEW_THREAD, |
| 721 | &thread_wrapper, info, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 722 | my_assert(tid_child != VG_INVALID_THREADID); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 723 | |
sewardj | 1462c8b | 2002-07-24 09:41:52 +0000 | [diff] [blame] | 724 | if (__thredd) |
| 725 | *__thredd = tid_child; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 726 | return 0; /* success */ |
| 727 | } |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 728 | |
| 729 | |
| 730 | int |
| 731 | pthread_join (pthread_t __th, void **__thread_return) |
| 732 | { |
| 733 | int res; |
| 734 | ensure_valgrind("pthread_join"); |
| 735 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 736 | VG_USERREQ__PTHREAD_JOIN, |
| 737 | __th, __thread_return, 0, 0); |
| 738 | return res; |
| 739 | } |
| 740 | |
| 741 | |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 742 | void pthread_exit(void *retval) |
| 743 | { |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 744 | ensure_valgrind("pthread_exit"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 745 | /* Simple! */ |
| 746 | thread_exit_wrapper(retval); |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 747 | } |
| 748 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 749 | |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 750 | int pthread_detach(pthread_t th) |
| 751 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 752 | int res; |
| 753 | ensure_valgrind("pthread_detach"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 754 | /* First we enquire as to the current detach state. */ |
| 755 | VALGRIND_MAGIC_SEQUENCE(res, (-2) /* default */, |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 756 | VG_USERREQ__SET_OR_GET_DETACH, |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 757 | 2 /* get */, th, 0, 0); |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 758 | if (res == -1) { |
| 759 | /* not found */ |
| 760 | pthread_error("pthread_detach: " |
| 761 | "invalid target thread"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 762 | return ESRCH; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 763 | } |
| 764 | if (res == 1) { |
| 765 | /* already detached */ |
| 766 | pthread_error("pthread_detach: " |
| 767 | "target thread is already detached"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 768 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 769 | } |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 770 | if (res == 0) { |
| 771 | VALGRIND_MAGIC_SEQUENCE(res, (-2) /* default */, |
| 772 | VG_USERREQ__SET_OR_GET_DETACH, |
| 773 | 1 /* set */, th, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 774 | my_assert(res == 0); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 775 | return 0; |
| 776 | } |
| 777 | barf("pthread_detach"); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 778 | } |
| 779 | |
| 780 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 781 | /* --------------------------------------------------- |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 782 | CLEANUP STACKS |
| 783 | ------------------------------------------------ */ |
| 784 | |
| 785 | void _pthread_cleanup_push (struct _pthread_cleanup_buffer *__buffer, |
| 786 | void (*__routine) (void *), |
| 787 | void *__arg) |
| 788 | { |
| 789 | int res; |
| 790 | CleanupEntry cu; |
| 791 | ensure_valgrind("_pthread_cleanup_push"); |
| 792 | cu.fn = __routine; |
| 793 | cu.arg = __arg; |
| 794 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 795 | VG_USERREQ__CLEANUP_PUSH, |
| 796 | &cu, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 797 | my_assert(res == 0); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 798 | } |
| 799 | |
| 800 | |
| 801 | void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *__buffer, |
| 802 | void (*__routine) (void *), |
| 803 | void *__arg) |
| 804 | { |
| 805 | /* As _pthread_cleanup_push, but first save the thread's original |
| 806 | cancellation type in __buffer and set it to Deferred. */ |
| 807 | int orig_ctype; |
| 808 | ensure_valgrind("_pthread_cleanup_push_defer"); |
| 809 | /* Set to Deferred, and put the old cancellation type in res. */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 810 | my_assert(-1 != PTHREAD_CANCEL_DEFERRED); |
| 811 | my_assert(-1 != PTHREAD_CANCEL_ASYNCHRONOUS); |
| 812 | my_assert(sizeof(struct _pthread_cleanup_buffer) >= sizeof(int)); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 813 | VALGRIND_MAGIC_SEQUENCE(orig_ctype, (-1) /* default */, |
| 814 | VG_USERREQ__SET_CANCELTYPE, |
| 815 | PTHREAD_CANCEL_DEFERRED, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 816 | my_assert(orig_ctype != -1); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 817 | *((int*)(__buffer)) = orig_ctype; |
| 818 | /* Now push the cleanup. */ |
| 819 | _pthread_cleanup_push(NULL, __routine, __arg); |
| 820 | } |
| 821 | |
| 822 | |
| 823 | void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *__buffer, |
| 824 | int __execute) |
| 825 | { |
| 826 | int res; |
| 827 | CleanupEntry cu; |
| 828 | ensure_valgrind("_pthread_cleanup_push"); |
| 829 | cu.fn = cu.arg = NULL; /* paranoia */ |
| 830 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 831 | VG_USERREQ__CLEANUP_POP, |
| 832 | &cu, 0, 0, 0); |
| 833 | if (res == 0) { |
| 834 | /* pop succeeded */ |
| 835 | if (__execute) { |
| 836 | cu.fn ( cu.arg ); |
| 837 | } |
| 838 | return; |
| 839 | } |
| 840 | if (res == -1) { |
| 841 | /* stack underflow */ |
| 842 | return; |
| 843 | } |
| 844 | barf("_pthread_cleanup_pop"); |
| 845 | } |
| 846 | |
| 847 | |
| 848 | void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *__buffer, |
| 849 | int __execute) |
| 850 | { |
| 851 | int orig_ctype, fake_ctype; |
| 852 | /* As _pthread_cleanup_pop, but after popping/running the handler, |
| 853 | restore the thread's original cancellation type from the first |
| 854 | word of __buffer. */ |
| 855 | _pthread_cleanup_pop(NULL, __execute); |
| 856 | orig_ctype = *((int*)(__buffer)); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 857 | my_assert(orig_ctype == PTHREAD_CANCEL_DEFERRED |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 858 | || orig_ctype == PTHREAD_CANCEL_ASYNCHRONOUS); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 859 | my_assert(-1 != PTHREAD_CANCEL_DEFERRED); |
| 860 | my_assert(-1 != PTHREAD_CANCEL_ASYNCHRONOUS); |
| 861 | my_assert(sizeof(struct _pthread_cleanup_buffer) >= sizeof(int)); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 862 | VALGRIND_MAGIC_SEQUENCE(fake_ctype, (-1) /* default */, |
| 863 | VG_USERREQ__SET_CANCELTYPE, |
| 864 | orig_ctype, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 865 | my_assert(fake_ctype == PTHREAD_CANCEL_DEFERRED); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 866 | } |
| 867 | |
| 868 | |
| 869 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 870 | MUTEX ATTRIBUTES |
| 871 | ------------------------------------------------ */ |
| 872 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 873 | int __pthread_mutexattr_init(pthread_mutexattr_t *attr) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 874 | { |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 875 | attr->__mutexkind = PTHREAD_MUTEX_ERRORCHECK_NP; |
sewardj | 8937c81 | 2002-04-12 20:12:20 +0000 | [diff] [blame] | 876 | return 0; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 877 | } |
| 878 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 879 | int __pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type) |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 880 | { |
| 881 | switch (type) { |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 882 | # ifndef GLIBC_2_1 |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 883 | case PTHREAD_MUTEX_TIMED_NP: |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 884 | case PTHREAD_MUTEX_ADAPTIVE_NP: |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 885 | # endif |
sewardj | a1679dd | 2002-05-10 22:31:40 +0000 | [diff] [blame] | 886 | # ifdef GLIBC_2_1 |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 887 | case PTHREAD_MUTEX_FAST_NP: |
sewardj | a1679dd | 2002-05-10 22:31:40 +0000 | [diff] [blame] | 888 | # endif |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 889 | case PTHREAD_MUTEX_RECURSIVE_NP: |
| 890 | case PTHREAD_MUTEX_ERRORCHECK_NP: |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 891 | attr->__mutexkind = type; |
| 892 | return 0; |
| 893 | default: |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 894 | pthread_error("pthread_mutexattr_settype: " |
| 895 | "invalid type"); |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 896 | return EINVAL; |
| 897 | } |
| 898 | } |
| 899 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 900 | int __pthread_mutexattr_destroy(pthread_mutexattr_t *attr) |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 901 | { |
| 902 | return 0; |
| 903 | } |
| 904 | |
sewardj | f099551 | 2003-07-06 01:29:49 +0000 | [diff] [blame] | 905 | int __pthread_mutexattr_setpshared ( pthread_mutexattr_t* attr, int pshared) |
sewardj | 7685cae | 2003-07-06 01:23:11 +0000 | [diff] [blame] | 906 | { |
| 907 | if (pshared != PTHREAD_PROCESS_PRIVATE && pshared != PTHREAD_PROCESS_SHARED) |
| 908 | return EINVAL; |
| 909 | |
| 910 | /* For now it is not possible to shared a conditional variable. */ |
| 911 | if (pshared != PTHREAD_PROCESS_PRIVATE) |
| 912 | return ENOSYS; |
| 913 | |
| 914 | return 0; |
| 915 | } |
| 916 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 917 | |
| 918 | /* --------------------------------------------------- |
| 919 | MUTEXes |
| 920 | ------------------------------------------------ */ |
| 921 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 922 | int __pthread_mutex_init(pthread_mutex_t *mutex, |
| 923 | const pthread_mutexattr_t *mutexattr) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 924 | { |
sewardj | 604ec3c | 2002-04-18 22:38:41 +0000 | [diff] [blame] | 925 | mutex->__m_count = 0; |
| 926 | mutex->__m_owner = (_pthread_descr)VG_INVALID_THREADID; |
| 927 | mutex->__m_kind = PTHREAD_MUTEX_ERRORCHECK_NP; |
| 928 | if (mutexattr) |
| 929 | mutex->__m_kind = mutexattr->__mutexkind; |
| 930 | return 0; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 931 | } |
| 932 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 933 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 934 | int __pthread_mutex_lock(pthread_mutex_t *mutex) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 935 | { |
| 936 | int res; |
sewardj | d8acdf2 | 2002-11-13 21:57:52 +0000 | [diff] [blame] | 937 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 938 | if (RUNNING_ON_VALGRIND) { |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 939 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 940 | VG_USERREQ__PTHREAD_MUTEX_LOCK, |
| 941 | mutex, 0, 0, 0); |
| 942 | return res; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 943 | } else { |
sewardj | d8acdf2 | 2002-11-13 21:57:52 +0000 | [diff] [blame] | 944 | /* Play at locking */ |
| 945 | if (0) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 946 | kludged("prehistoric lock", NULL); |
sewardj | d8acdf2 | 2002-11-13 21:57:52 +0000 | [diff] [blame] | 947 | mutex->__m_owner = (_pthread_descr)1; |
| 948 | mutex->__m_count = 1; |
| 949 | mutex->__m_kind |= VG_PTHREAD_PREHISTORY; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 950 | return 0; /* success */ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 951 | } |
| 952 | } |
| 953 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 954 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 955 | int __pthread_mutex_trylock(pthread_mutex_t *mutex) |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 956 | { |
| 957 | int res; |
sewardj | d8acdf2 | 2002-11-13 21:57:52 +0000 | [diff] [blame] | 958 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 959 | if (RUNNING_ON_VALGRIND) { |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 960 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 961 | VG_USERREQ__PTHREAD_MUTEX_TRYLOCK, |
| 962 | mutex, 0, 0, 0); |
| 963 | return res; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 964 | } else { |
sewardj | d8acdf2 | 2002-11-13 21:57:52 +0000 | [diff] [blame] | 965 | /* Play at locking */ |
| 966 | if (0) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 967 | kludged("prehistoric trylock", NULL); |
sewardj | d8acdf2 | 2002-11-13 21:57:52 +0000 | [diff] [blame] | 968 | mutex->__m_owner = (_pthread_descr)1; |
| 969 | mutex->__m_count = 1; |
| 970 | mutex->__m_kind |= VG_PTHREAD_PREHISTORY; |
| 971 | return 0; /* success */ |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 972 | } |
| 973 | } |
| 974 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 975 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 976 | int __pthread_mutex_unlock(pthread_mutex_t *mutex) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 977 | { |
| 978 | int res; |
sewardj | d8acdf2 | 2002-11-13 21:57:52 +0000 | [diff] [blame] | 979 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 980 | if (RUNNING_ON_VALGRIND) { |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 981 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 982 | VG_USERREQ__PTHREAD_MUTEX_UNLOCK, |
| 983 | mutex, 0, 0, 0); |
| 984 | return res; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 985 | } else { |
sewardj | d8acdf2 | 2002-11-13 21:57:52 +0000 | [diff] [blame] | 986 | /* Play at locking */ |
| 987 | if (0) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 988 | kludged("prehistoric unlock", NULL); |
sewardj | d8acdf2 | 2002-11-13 21:57:52 +0000 | [diff] [blame] | 989 | mutex->__m_owner = 0; |
| 990 | mutex->__m_count = 0; |
| 991 | mutex->__m_kind &= ~VG_PTHREAD_PREHISTORY; |
| 992 | return 0; /* success */ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 993 | } |
| 994 | } |
| 995 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 996 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 997 | int __pthread_mutex_destroy(pthread_mutex_t *mutex) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 998 | { |
sewardj | 604ec3c | 2002-04-18 22:38:41 +0000 | [diff] [blame] | 999 | /* Valgrind doesn't hold any resources on behalf of the mutex, so no |
| 1000 | need to involve it. */ |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1001 | if (mutex->__m_count > 0) { |
sewardj | d8acdf2 | 2002-11-13 21:57:52 +0000 | [diff] [blame] | 1002 | /* Oh, the horror. glibc's internal use of pthreads "knows" |
| 1003 | that destroying a lock does an implicit unlock. Make it |
| 1004 | explicit. */ |
| 1005 | __pthread_mutex_unlock(mutex); |
| 1006 | pthread_error("pthread_mutex_destroy: " |
| 1007 | "mutex is still in use"); |
| 1008 | return EBUSY; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1009 | } |
| 1010 | mutex->__m_count = 0; |
| 1011 | mutex->__m_owner = (_pthread_descr)VG_INVALID_THREADID; |
| 1012 | mutex->__m_kind = PTHREAD_MUTEX_ERRORCHECK_NP; |
| 1013 | return 0; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1014 | } |
| 1015 | |
| 1016 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1017 | /* --------------------------------------------------- |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 1018 | CONDITION VARIABLES |
| 1019 | ------------------------------------------------ */ |
| 1020 | |
| 1021 | /* LinuxThreads supports no attributes for conditions. Hence ... */ |
| 1022 | |
| 1023 | int pthread_condattr_init(pthread_condattr_t *attr) |
| 1024 | { |
| 1025 | return 0; |
| 1026 | } |
| 1027 | |
sewardj | 0738a59 | 2002-04-20 13:59:33 +0000 | [diff] [blame] | 1028 | int pthread_condattr_destroy(pthread_condattr_t *attr) |
| 1029 | { |
| 1030 | return 0; |
| 1031 | } |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 1032 | |
| 1033 | int pthread_cond_init( pthread_cond_t *cond, |
| 1034 | const pthread_condattr_t *cond_attr) |
| 1035 | { |
| 1036 | cond->__c_waiting = (_pthread_descr)VG_INVALID_THREADID; |
| 1037 | return 0; |
| 1038 | } |
| 1039 | |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 1040 | int pthread_cond_destroy(pthread_cond_t *cond) |
| 1041 | { |
| 1042 | /* should check that no threads are waiting on this CV */ |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 1043 | static int moans = N_MOANS; |
| 1044 | if (moans-- > 0) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 1045 | kludged("pthread_cond_destroy", |
| 1046 | "(it doesn't check if the cond is waited on)" ); |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 1047 | return 0; |
| 1048 | } |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 1049 | |
| 1050 | /* --------------------------------------------------- |
| 1051 | SCHEDULING |
| 1052 | ------------------------------------------------ */ |
| 1053 | |
| 1054 | /* This is completely bogus. */ |
| 1055 | int pthread_getschedparam(pthread_t target_thread, |
| 1056 | int *policy, |
| 1057 | struct sched_param *param) |
| 1058 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 1059 | static int moans = N_MOANS; |
| 1060 | if (moans-- > 0) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 1061 | kludged("pthread_getschedparam", NULL); |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 1062 | if (policy) *policy = SCHED_OTHER; |
sewardj | 3e909ce | 2002-06-03 13:27:15 +0000 | [diff] [blame] | 1063 | # ifdef HAVE_SCHED_PRIORITY |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 1064 | if (param) param->sched_priority = 0; /* who knows */ |
| 1065 | # else |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 1066 | if (param) param->__sched_priority = 0; /* who knows */ |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 1067 | # endif |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 1068 | return 0; |
| 1069 | } |
| 1070 | |
| 1071 | int pthread_setschedparam(pthread_t target_thread, |
| 1072 | int policy, |
| 1073 | const struct sched_param *param) |
| 1074 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 1075 | static int moans = N_MOANS; |
| 1076 | if (moans-- > 0) |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 1077 | ignored("pthread_setschedparam", "(scheduling not changeable)"); |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 1078 | return 0; |
| 1079 | } |
| 1080 | |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 1081 | int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex) |
| 1082 | { |
| 1083 | int res; |
| 1084 | ensure_valgrind("pthread_cond_wait"); |
| 1085 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1086 | VG_USERREQ__PTHREAD_COND_WAIT, |
| 1087 | cond, mutex, 0, 0); |
| 1088 | return res; |
| 1089 | } |
| 1090 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1091 | int pthread_cond_timedwait ( pthread_cond_t *cond, |
| 1092 | pthread_mutex_t *mutex, |
| 1093 | const struct timespec *abstime ) |
| 1094 | { |
| 1095 | int res; |
| 1096 | unsigned int ms_now, ms_end; |
| 1097 | struct timeval timeval_now; |
| 1098 | unsigned long long int ull_ms_now_after_1970; |
| 1099 | unsigned long long int ull_ms_end_after_1970; |
| 1100 | |
| 1101 | ensure_valgrind("pthread_cond_timedwait"); |
| 1102 | VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| 1103 | VG_USERREQ__READ_MILLISECOND_TIMER, |
| 1104 | 0, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1105 | my_assert(ms_now != 0xFFFFFFFF); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1106 | res = gettimeofday(&timeval_now, NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1107 | my_assert(res == 0); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1108 | |
| 1109 | ull_ms_now_after_1970 |
| 1110 | = 1000ULL * ((unsigned long long int)(timeval_now.tv_sec)) |
| 1111 | + ((unsigned long long int)(timeval_now.tv_usec / 1000000)); |
| 1112 | ull_ms_end_after_1970 |
| 1113 | = 1000ULL * ((unsigned long long int)(abstime->tv_sec)) |
| 1114 | + ((unsigned long long int)(abstime->tv_nsec / 1000000)); |
sewardj | d8e919e | 2002-05-29 20:13:53 +0000 | [diff] [blame] | 1115 | if (ull_ms_end_after_1970 < ull_ms_now_after_1970) |
| 1116 | ull_ms_end_after_1970 = ull_ms_now_after_1970; |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1117 | ms_end |
| 1118 | = ms_now + (unsigned int)(ull_ms_end_after_1970 - ull_ms_now_after_1970); |
| 1119 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1120 | VG_USERREQ__PTHREAD_COND_TIMEDWAIT, |
| 1121 | cond, mutex, ms_end, 0); |
| 1122 | return res; |
| 1123 | } |
| 1124 | |
| 1125 | |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 1126 | int pthread_cond_signal(pthread_cond_t *cond) |
| 1127 | { |
| 1128 | int res; |
| 1129 | ensure_valgrind("pthread_cond_signal"); |
| 1130 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1131 | VG_USERREQ__PTHREAD_COND_SIGNAL, |
| 1132 | cond, 0, 0, 0); |
| 1133 | return res; |
| 1134 | } |
| 1135 | |
| 1136 | int pthread_cond_broadcast(pthread_cond_t *cond) |
| 1137 | { |
| 1138 | int res; |
| 1139 | ensure_valgrind("pthread_cond_broadcast"); |
| 1140 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1141 | VG_USERREQ__PTHREAD_COND_BROADCAST, |
| 1142 | cond, 0, 0, 0); |
| 1143 | return res; |
| 1144 | } |
| 1145 | |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 1146 | |
| 1147 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1148 | CANCELLATION |
| 1149 | ------------------------------------------------ */ |
| 1150 | |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1151 | int pthread_setcancelstate(int state, int *oldstate) |
| 1152 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1153 | int res; |
| 1154 | ensure_valgrind("pthread_setcancelstate"); |
| 1155 | if (state != PTHREAD_CANCEL_ENABLE |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1156 | && state != PTHREAD_CANCEL_DISABLE) { |
| 1157 | pthread_error("pthread_setcancelstate: " |
| 1158 | "invalid state"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1159 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1160 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1161 | my_assert(-1 != PTHREAD_CANCEL_ENABLE); |
| 1162 | my_assert(-1 != PTHREAD_CANCEL_DISABLE); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1163 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1164 | VG_USERREQ__SET_CANCELSTATE, |
| 1165 | state, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1166 | my_assert(res != -1); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1167 | if (oldstate) |
| 1168 | *oldstate = res; |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1169 | return 0; |
| 1170 | } |
| 1171 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1172 | int pthread_setcanceltype(int type, int *oldtype) |
| 1173 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1174 | int res; |
| 1175 | ensure_valgrind("pthread_setcanceltype"); |
| 1176 | if (type != PTHREAD_CANCEL_DEFERRED |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1177 | && type != PTHREAD_CANCEL_ASYNCHRONOUS) { |
| 1178 | pthread_error("pthread_setcanceltype: " |
| 1179 | "invalid type"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1180 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1181 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1182 | my_assert(-1 != PTHREAD_CANCEL_DEFERRED); |
| 1183 | my_assert(-1 != PTHREAD_CANCEL_ASYNCHRONOUS); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1184 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1185 | VG_USERREQ__SET_CANCELTYPE, |
| 1186 | type, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1187 | my_assert(res != -1); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1188 | if (oldtype) |
| 1189 | *oldtype = res; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1190 | return 0; |
| 1191 | } |
| 1192 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1193 | int pthread_cancel(pthread_t thread) |
| 1194 | { |
| 1195 | int res; |
| 1196 | ensure_valgrind("pthread_cancel"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1197 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1198 | VG_USERREQ__SET_CANCELPEND, |
| 1199 | thread, &thread_exit_wrapper, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1200 | my_assert(res != -1); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1201 | return res; |
| 1202 | } |
| 1203 | |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1204 | static |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1205 | void __my_pthread_testcancel(void) |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1206 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1207 | int res; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1208 | ensure_valgrind("__my_pthread_testcancel"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1209 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1210 | VG_USERREQ__TESTCANCEL, |
| 1211 | 0, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1212 | my_assert(res == 0); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1213 | } |
| 1214 | |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1215 | void pthread_testcancel ( void ) |
| 1216 | { |
| 1217 | __my_pthread_testcancel(); |
| 1218 | } |
| 1219 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1220 | |
sewardj | ef037c7 | 2002-05-30 00:40:03 +0000 | [diff] [blame] | 1221 | /* Not really sure what this is for. I suspect for doing the POSIX |
| 1222 | requirements for fork() and exec(). We do this internally anyway |
| 1223 | whenever those syscalls are observed, so this could be superfluous, |
| 1224 | but hey ... |
| 1225 | */ |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1226 | void __pthread_kill_other_threads_np ( void ) |
| 1227 | { |
sewardj | ef037c7 | 2002-05-30 00:40:03 +0000 | [diff] [blame] | 1228 | int res; |
| 1229 | ensure_valgrind("__pthread_kill_other_threads_np"); |
| 1230 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1231 | VG_USERREQ__NUKE_OTHER_THREADS, |
| 1232 | 0, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1233 | my_assert(res == 0); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1234 | } |
| 1235 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1236 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1237 | /* --------------------------------------------------- |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1238 | SIGNALS |
| 1239 | ------------------------------------------------ */ |
| 1240 | |
| 1241 | #include <signal.h> |
| 1242 | |
| 1243 | int pthread_sigmask(int how, const sigset_t *newmask, |
| 1244 | sigset_t *oldmask) |
| 1245 | { |
| 1246 | int res; |
| 1247 | |
| 1248 | /* A bit subtle, because the scheduler expects newmask and oldmask |
| 1249 | to be vki_sigset_t* rather than sigset_t*, and the two are |
| 1250 | different. Fortunately the first 64 bits of a sigset_t are |
| 1251 | exactly a vki_sigset_t, so we just pass the pointers through |
| 1252 | unmodified. Haaaack! |
| 1253 | |
| 1254 | Also mash the how value so that the SIG_ constants from glibc |
sewardj | 018f762 | 2002-05-15 21:13:39 +0000 | [diff] [blame] | 1255 | constants to VKI_ constants, so that the former do not have to |
| 1256 | be included into vg_scheduler.c. */ |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1257 | |
| 1258 | ensure_valgrind("pthread_sigmask"); |
| 1259 | |
| 1260 | switch (how) { |
sewardj | 018f762 | 2002-05-15 21:13:39 +0000 | [diff] [blame] | 1261 | case SIG_SETMASK: how = VKI_SIG_SETMASK; break; |
| 1262 | case SIG_BLOCK: how = VKI_SIG_BLOCK; break; |
| 1263 | case SIG_UNBLOCK: how = VKI_SIG_UNBLOCK; break; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1264 | default: pthread_error("pthread_sigmask: invalid how"); |
| 1265 | return EINVAL; |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1266 | } |
| 1267 | |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1268 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1269 | VG_USERREQ__PTHREAD_SIGMASK, |
| 1270 | how, newmask, oldmask, 0); |
| 1271 | |
| 1272 | /* The scheduler tells us of any memory violations. */ |
| 1273 | return res == 0 ? 0 : EFAULT; |
| 1274 | } |
| 1275 | |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1276 | int sigwait ( const sigset_t* set, int* sig ) |
| 1277 | { |
| 1278 | int res; |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1279 | vki_ksiginfo_t si; |
| 1280 | |
| 1281 | __my_pthread_testcancel(); |
| 1282 | |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1283 | /* As with pthread_sigmask we deliberately confuse sigset_t with |
| 1284 | vki_ksigset_t. */ |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1285 | si.si_signo = 0; |
| 1286 | res = VG_(ksigtimedwait)((const vki_ksigset_t *)set, &si, NULL); |
| 1287 | *sig = si.si_signo; |
| 1288 | |
| 1289 | return 0; /* always returns 0 */ |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1290 | } |
| 1291 | |
| 1292 | |
sewardj | 018f762 | 2002-05-15 21:13:39 +0000 | [diff] [blame] | 1293 | int pthread_kill(pthread_t thread, int signo) |
| 1294 | { |
| 1295 | int res; |
| 1296 | ensure_valgrind("pthread_kill"); |
| 1297 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1298 | VG_USERREQ__PTHREAD_KILL, |
| 1299 | thread, signo, 0, 0); |
| 1300 | return res; |
| 1301 | } |
| 1302 | |
| 1303 | |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1304 | /* Copied verbatim from Linuxthreads */ |
| 1305 | /* Redefine raise() to send signal to calling thread only, |
| 1306 | as per POSIX 1003.1c */ |
| 1307 | int raise (int sig) |
| 1308 | { |
| 1309 | int retcode = pthread_kill(pthread_self(), sig); |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1310 | if (retcode == 0) { |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1311 | return 0; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1312 | } else { |
sewardj | 25418ae | 2003-05-09 23:40:34 +0000 | [diff] [blame] | 1313 | *(__errno_location()) = retcode; |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1314 | return -1; |
| 1315 | } |
| 1316 | } |
| 1317 | |
| 1318 | |
sewardj | 9a2224b | 2002-06-19 10:17:40 +0000 | [diff] [blame] | 1319 | |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1320 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1321 | THREAD-SPECIFICs |
| 1322 | ------------------------------------------------ */ |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1323 | |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1324 | static |
| 1325 | int key_is_valid (pthread_key_t key) |
| 1326 | { |
| 1327 | int res; |
| 1328 | VALGRIND_MAGIC_SEQUENCE(res, 2 /* default */, |
| 1329 | VG_USERREQ__PTHREAD_KEY_VALIDATE, |
| 1330 | key, 0, 0, 0); |
| 1331 | my_assert(res != 2); |
| 1332 | return res; |
| 1333 | } |
| 1334 | |
| 1335 | |
| 1336 | /* Returns NULL if thread is invalid. Otherwise, if the thread |
| 1337 | already has a specifics area, return that. Otherwise allocate it |
| 1338 | one. */ |
| 1339 | static |
| 1340 | void** get_or_allocate_specifics_ptr ( pthread_t thread ) |
| 1341 | { |
| 1342 | int res, i; |
| 1343 | void** specifics_ptr; |
| 1344 | ensure_valgrind("get_or_allocate_specifics_ptr"); |
| 1345 | |
| 1346 | /* Returns zero if the thread has no specific_ptr. One if thread |
| 1347 | is invalid. Otherwise, the specific_ptr value. This is |
| 1348 | allocated with my_malloc and so is aligned and cannot be |
| 1349 | confused with 1 or 3. */ |
| 1350 | VALGRIND_MAGIC_SEQUENCE(specifics_ptr, 3 /* default */, |
| 1351 | VG_USERREQ__PTHREAD_GETSPECIFIC_PTR, |
| 1352 | thread, 0, 0, 0); |
| 1353 | my_assert(specifics_ptr != (void**)3); |
| 1354 | |
| 1355 | if (specifics_ptr == (void**)1) |
| 1356 | return NULL; /* invalid thread */ |
| 1357 | |
| 1358 | if (specifics_ptr != NULL) |
| 1359 | return specifics_ptr; /* already has a specifics ptr. */ |
| 1360 | |
| 1361 | /* None yet ... allocate a new one. Should never fail. */ |
| 1362 | specifics_ptr = my_malloc( VG_N_THREAD_KEYS * sizeof(void*) ); |
| 1363 | my_assert(specifics_ptr != NULL); |
| 1364 | |
| 1365 | VALGRIND_MAGIC_SEQUENCE(res, -1 /* default */, |
| 1366 | VG_USERREQ__PTHREAD_SETSPECIFIC_PTR, |
| 1367 | specifics_ptr, 0, 0, 0); |
| 1368 | my_assert(res == 0); |
| 1369 | |
| 1370 | /* POSIX sez: "Upon thread creation, the value NULL shall be |
| 1371 | associated with all defined keys in the new thread." This |
| 1372 | allocation is in effect a delayed allocation of the specific |
| 1373 | data for a thread, at its first-use. Hence we initialise it |
| 1374 | here. */ |
| 1375 | for (i = 0; i < VG_N_THREAD_KEYS; i++) { |
| 1376 | specifics_ptr[i] = NULL; |
| 1377 | } |
| 1378 | |
| 1379 | return specifics_ptr; |
| 1380 | } |
| 1381 | |
| 1382 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1383 | int __pthread_key_create(pthread_key_t *key, |
| 1384 | void (*destr_function) (void *)) |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1385 | { |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1386 | void** specifics_ptr; |
| 1387 | int res, i; |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1388 | ensure_valgrind("pthread_key_create"); |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1389 | |
| 1390 | /* This writes *key if successful. It should never fail. */ |
| 1391 | VALGRIND_MAGIC_SEQUENCE(res, 1 /* default */, |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1392 | VG_USERREQ__PTHREAD_KEY_CREATE, |
| 1393 | key, destr_function, 0, 0); |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1394 | |
| 1395 | if (res == 0) { |
| 1396 | /* POSIX sez: "Upon key creation, the value NULL shall be |
| 1397 | associated with the new key in all active threads." */ |
| 1398 | for (i = 0; i < VG_N_THREADS; i++) { |
| 1399 | specifics_ptr = get_or_allocate_specifics_ptr(i); |
| 1400 | /* we get NULL if i is an invalid thread. */ |
| 1401 | if (specifics_ptr != NULL) |
| 1402 | specifics_ptr[*key] = NULL; |
| 1403 | } |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1404 | } |
| 1405 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1406 | return res; |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1407 | } |
| 1408 | |
| 1409 | int pthread_key_delete(pthread_key_t key) |
| 1410 | { |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1411 | int res; |
njn | dfc9b8c | 2003-09-29 12:58:37 +0000 | [diff] [blame] | 1412 | ensure_valgrind("pthread_key_delete"); |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1413 | if (!key_is_valid(key)) |
| 1414 | return EINVAL; |
| 1415 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1416 | VG_USERREQ__PTHREAD_KEY_DELETE, |
| 1417 | key, 0, 0, 0); |
| 1418 | my_assert(res == 0); |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1419 | return 0; |
| 1420 | } |
| 1421 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1422 | int __pthread_setspecific(pthread_key_t key, const void *pointer) |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1423 | { |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1424 | void** specifics_ptr; |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1425 | ensure_valgrind("pthread_setspecific"); |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1426 | |
| 1427 | if (!key_is_valid(key)) |
| 1428 | return EINVAL; |
| 1429 | |
| 1430 | specifics_ptr = get_or_allocate_specifics_ptr(pthread_self()); |
| 1431 | specifics_ptr[key] = (void*)pointer; |
| 1432 | return 0; |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1433 | } |
| 1434 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1435 | void * __pthread_getspecific(pthread_key_t key) |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1436 | { |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1437 | void** specifics_ptr; |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1438 | ensure_valgrind("pthread_getspecific"); |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1439 | |
| 1440 | if (!key_is_valid(key)) |
| 1441 | return NULL; |
| 1442 | |
| 1443 | specifics_ptr = get_or_allocate_specifics_ptr(pthread_self()); |
| 1444 | return specifics_ptr[key]; |
| 1445 | } |
| 1446 | |
| 1447 | |
sewardj | 9aa918d | 2002-10-20 16:25:55 +0000 | [diff] [blame] | 1448 | #ifdef GLIBC_2_3 |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1449 | static |
| 1450 | void ** __pthread_getspecific_addr(pthread_key_t key) |
| 1451 | { |
| 1452 | void** specifics_ptr; |
| 1453 | ensure_valgrind("pthread_getspecific_addr"); |
| 1454 | |
| 1455 | if (!key_is_valid(key)) |
| 1456 | return NULL; |
| 1457 | |
| 1458 | specifics_ptr = get_or_allocate_specifics_ptr(pthread_self()); |
| 1459 | return &(specifics_ptr[key]); |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1460 | } |
sewardj | 9aa918d | 2002-10-20 16:25:55 +0000 | [diff] [blame] | 1461 | #endif |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1462 | |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 1463 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1464 | /* --------------------------------------------------- |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1465 | ONCEry |
| 1466 | ------------------------------------------------ */ |
| 1467 | |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 1468 | /* This protects reads and writes of the once_control variable |
| 1469 | supplied. It is never held whilst any particular initialiser is |
| 1470 | running. */ |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1471 | static pthread_mutex_t once_masterlock = PTHREAD_MUTEX_INITIALIZER; |
| 1472 | |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 1473 | /* Initialiser needs to be run. */ |
| 1474 | #define P_ONCE_NOT_DONE ((PTHREAD_ONCE_INIT) + 0) |
| 1475 | |
| 1476 | /* Initialiser currently running. */ |
| 1477 | #define P_ONCE_RUNNING ((PTHREAD_ONCE_INIT) + 1) |
| 1478 | |
| 1479 | /* Initialiser has completed. */ |
| 1480 | #define P_ONCE_COMPLETED ((PTHREAD_ONCE_INIT) + 2) |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1481 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1482 | int __pthread_once ( pthread_once_t *once_control, |
| 1483 | void (*init_routine) (void) ) |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1484 | { |
| 1485 | int res; |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 1486 | int done; |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1487 | |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 1488 | # define TAKE_LOCK \ |
| 1489 | res = __pthread_mutex_lock(&once_masterlock); \ |
| 1490 | my_assert(res == 0); |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1491 | |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 1492 | # define RELEASE_LOCK \ |
| 1493 | res = __pthread_mutex_unlock(&once_masterlock); \ |
| 1494 | my_assert(res == 0); |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1495 | |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1496 | void cleanup(void *v) { |
| 1497 | TAKE_LOCK; |
| 1498 | *once_control = P_ONCE_NOT_DONE; |
| 1499 | RELEASE_LOCK; |
| 1500 | } |
| 1501 | |
| 1502 | ensure_valgrind("pthread_once"); |
| 1503 | |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 1504 | /* Grab the lock transiently, so we can safely see what state this |
| 1505 | once_control is in. */ |
| 1506 | |
| 1507 | TAKE_LOCK; |
| 1508 | |
| 1509 | switch (*once_control) { |
| 1510 | |
| 1511 | case P_ONCE_NOT_DONE: |
| 1512 | /* Not started. Change state to indicate running, drop the |
| 1513 | lock and run. */ |
| 1514 | *once_control = P_ONCE_RUNNING; |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1515 | _pthread_cleanup_push(NULL, cleanup, NULL); |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 1516 | RELEASE_LOCK; |
| 1517 | init_routine(); |
| 1518 | /* re-take the lock, and set state to indicate done. */ |
| 1519 | TAKE_LOCK; |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1520 | _pthread_cleanup_pop(NULL, False); |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 1521 | *once_control = P_ONCE_COMPLETED; |
| 1522 | RELEASE_LOCK; |
| 1523 | break; |
| 1524 | |
| 1525 | case P_ONCE_RUNNING: |
| 1526 | /* This is the tricky case. The initialiser is running in |
| 1527 | some other thread, but we have to delay this thread till |
| 1528 | the other one completes. So we sort-of busy wait. In |
| 1529 | fact it makes sense to yield now, because what we want to |
| 1530 | happen is for the thread running the initialiser to |
| 1531 | complete ASAP. */ |
| 1532 | RELEASE_LOCK; |
| 1533 | done = 0; |
| 1534 | while (1) { |
| 1535 | /* Let others run for a while. */ |
| 1536 | __valgrind_pthread_yield(); |
| 1537 | /* Grab the lock and see if we're done waiting. */ |
| 1538 | TAKE_LOCK; |
| 1539 | if (*once_control == P_ONCE_COMPLETED) |
| 1540 | done = 1; |
| 1541 | RELEASE_LOCK; |
| 1542 | if (done) |
| 1543 | break; |
| 1544 | } |
| 1545 | break; |
| 1546 | |
| 1547 | case P_ONCE_COMPLETED: |
| 1548 | default: |
| 1549 | /* Easy. It's already done. Just drop the lock. */ |
| 1550 | RELEASE_LOCK; |
| 1551 | break; |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1552 | } |
| 1553 | |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1554 | return 0; |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 1555 | |
| 1556 | # undef TAKE_LOCK |
| 1557 | # undef RELEASE_LOCK |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1558 | } |
| 1559 | |
sewardj | c91a4ff | 2003-07-11 00:12:58 +0000 | [diff] [blame] | 1560 | #undef P_ONCE_NOT_DONE |
| 1561 | #undef P_ONCE_RUNNING |
| 1562 | #undef P_ONCE_COMPLETED |
| 1563 | |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1564 | |
| 1565 | /* --------------------------------------------------- |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1566 | MISC |
| 1567 | ------------------------------------------------ */ |
| 1568 | |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 1569 | static pthread_mutex_t pthread_atfork_lock |
| 1570 | = PTHREAD_MUTEX_INITIALIZER; |
| 1571 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1572 | int __pthread_atfork ( void (*prepare)(void), |
| 1573 | void (*parent)(void), |
| 1574 | void (*child)(void) ) |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1575 | { |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 1576 | int n, res; |
| 1577 | ForkHandlerEntry entry; |
| 1578 | |
| 1579 | ensure_valgrind("pthread_atfork"); |
| 1580 | __pthread_mutex_lock(&pthread_atfork_lock); |
| 1581 | |
| 1582 | /* Fetch old counter */ |
| 1583 | VALGRIND_MAGIC_SEQUENCE(n, -2 /* default */, |
| 1584 | VG_USERREQ__GET_FHSTACK_USED, |
| 1585 | 0, 0, 0, 0); |
| 1586 | my_assert(n >= 0 && n < VG_N_FORKHANDLERSTACK); |
| 1587 | if (n == VG_N_FORKHANDLERSTACK-1) |
| 1588 | barf("pthread_atfork: VG_N_FORKHANDLERSTACK is too low; " |
| 1589 | "increase and recompile"); |
| 1590 | |
| 1591 | /* Add entry */ |
| 1592 | entry.prepare = *prepare; |
| 1593 | entry.parent = *parent; |
| 1594 | entry.child = *child; |
| 1595 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 1596 | VG_USERREQ__SET_FHSTACK_ENTRY, |
| 1597 | n, &entry, 0, 0); |
| 1598 | my_assert(res == 0); |
| 1599 | |
| 1600 | /* Bump counter */ |
| 1601 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 1602 | VG_USERREQ__SET_FHSTACK_USED, |
| 1603 | n+1, 0, 0, 0); |
| 1604 | my_assert(res == 0); |
| 1605 | |
| 1606 | __pthread_mutex_unlock(&pthread_atfork_lock); |
| 1607 | return 0; |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1608 | } |
| 1609 | |
| 1610 | |
sewardj | 9df7883 | 2003-05-04 12:35:54 +0000 | [diff] [blame] | 1611 | #ifdef GLIBC_2_3 |
| 1612 | /* This seems to be a hook which appeared in glibc-2.3.2. */ |
| 1613 | int __register_atfork ( void (*prepare)(void), |
| 1614 | void (*parent)(void), |
| 1615 | void (*child)(void) ) |
| 1616 | { |
| 1617 | return __pthread_atfork(prepare,parent,child); |
| 1618 | } |
| 1619 | #endif |
| 1620 | |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1621 | WEAK |
sewardj | bb99078 | 2002-05-08 02:01:14 +0000 | [diff] [blame] | 1622 | void __pthread_initialize ( void ) |
| 1623 | { |
sewardj | bea1caa | 2002-05-10 23:20:58 +0000 | [diff] [blame] | 1624 | ensure_valgrind("__pthread_initialize"); |
sewardj | bb99078 | 2002-05-08 02:01:14 +0000 | [diff] [blame] | 1625 | } |
| 1626 | |
| 1627 | |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1628 | /* --------------------------------------------------- |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1629 | LIBRARY-PRIVATE THREAD SPECIFIC STATE |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1630 | ------------------------------------------------ */ |
| 1631 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1632 | #include <resolv.h> |
| 1633 | static int thread_specific_errno[VG_N_THREADS]; |
| 1634 | static int thread_specific_h_errno[VG_N_THREADS]; |
| 1635 | static struct __res_state |
| 1636 | thread_specific_res_state[VG_N_THREADS]; |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1637 | |
sewardj | 25418ae | 2003-05-09 23:40:34 +0000 | [diff] [blame] | 1638 | #undef errno |
| 1639 | extern int errno; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1640 | int* __errno_location ( void ) |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1641 | { |
| 1642 | int tid; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1643 | /* ensure_valgrind("__errno_location"); */ |
| 1644 | VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1645 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 1646 | 0, 0, 0, 0); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1647 | /* 'cos I'm paranoid ... */ |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 1648 | if (tid < 1 || tid >= VG_N_THREADS) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1649 | barf("__errno_location: invalid ThreadId"); |
sewardj | 25418ae | 2003-05-09 23:40:34 +0000 | [diff] [blame] | 1650 | if (tid == 1) |
| 1651 | return &errno; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1652 | return & thread_specific_errno[tid]; |
| 1653 | } |
| 1654 | |
sewardj | 25418ae | 2003-05-09 23:40:34 +0000 | [diff] [blame] | 1655 | #undef h_errno |
| 1656 | extern int h_errno; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1657 | int* __h_errno_location ( void ) |
| 1658 | { |
| 1659 | int tid; |
| 1660 | /* ensure_valgrind("__h_errno_location"); */ |
| 1661 | VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
| 1662 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 1663 | 0, 0, 0, 0); |
| 1664 | /* 'cos I'm paranoid ... */ |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 1665 | if (tid < 1 || tid >= VG_N_THREADS) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1666 | barf("__h_errno_location: invalid ThreadId"); |
sewardj | 25418ae | 2003-05-09 23:40:34 +0000 | [diff] [blame] | 1667 | if (tid == 1) |
| 1668 | return &h_errno; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1669 | return & thread_specific_h_errno[tid]; |
| 1670 | } |
| 1671 | |
sewardj | b0ff103 | 2002-08-06 09:02:53 +0000 | [diff] [blame] | 1672 | |
| 1673 | #undef _res |
| 1674 | extern struct __res_state _res; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1675 | struct __res_state* __res_state ( void ) |
| 1676 | { |
| 1677 | int tid; |
| 1678 | /* ensure_valgrind("__res_state"); */ |
| 1679 | VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
| 1680 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 1681 | 0, 0, 0, 0); |
| 1682 | /* 'cos I'm paranoid ... */ |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 1683 | if (tid < 1 || tid >= VG_N_THREADS) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1684 | barf("__res_state: invalid ThreadId"); |
sewardj | b0ff103 | 2002-08-06 09:02:53 +0000 | [diff] [blame] | 1685 | if (tid == 1) |
| 1686 | return & _res; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1687 | return & thread_specific_res_state[tid]; |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1688 | } |
| 1689 | |
| 1690 | |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1691 | /* --------------------------------------------------- |
| 1692 | LIBC-PRIVATE SPECIFIC DATA |
| 1693 | ------------------------------------------------ */ |
| 1694 | |
| 1695 | /* Relies on assumption that initial private data is NULL. This |
| 1696 | should be fixed somehow. */ |
| 1697 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1698 | /* The allowable keys (indices) (all 3 of them). |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1699 | From sysdeps/pthread/bits/libc-tsd.h |
| 1700 | */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1701 | /* as per glibc anoncvs HEAD of 20021001. */ |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1702 | enum __libc_tsd_key_t { _LIBC_TSD_KEY_MALLOC = 0, |
| 1703 | _LIBC_TSD_KEY_DL_ERROR, |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1704 | _LIBC_TSD_KEY_RPC_VARS, |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1705 | _LIBC_TSD_KEY_LOCALE, |
| 1706 | _LIBC_TSD_KEY_CTYPE_B, |
| 1707 | _LIBC_TSD_KEY_CTYPE_TOLOWER, |
| 1708 | _LIBC_TSD_KEY_CTYPE_TOUPPER, |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1709 | _LIBC_TSD_KEY_N }; |
| 1710 | |
| 1711 | /* Auto-initialising subsystem. libc_specifics_inited is set |
| 1712 | after initialisation. libc_specifics_inited_mx guards it. */ |
| 1713 | static int libc_specifics_inited = 0; |
| 1714 | static pthread_mutex_t libc_specifics_inited_mx = PTHREAD_MUTEX_INITIALIZER; |
| 1715 | |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1716 | |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1717 | /* These are the keys we must initialise the first time. */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1718 | static pthread_key_t libc_specifics_keys[_LIBC_TSD_KEY_N]; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1719 | |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1720 | |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1721 | /* Initialise the keys, if they are not already initialised. */ |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1722 | static |
| 1723 | void init_libc_tsd_keys ( void ) |
| 1724 | { |
| 1725 | int res, i; |
| 1726 | pthread_key_t k; |
| 1727 | |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame] | 1728 | /* Don't fall into deadlock if we get called again whilst we still |
| 1729 | hold the lock, via the __uselocale() call herein. */ |
| 1730 | if (libc_specifics_inited != 0) |
| 1731 | return; |
| 1732 | |
| 1733 | /* Take the lock. */ |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1734 | res = __pthread_mutex_lock(&libc_specifics_inited_mx); |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1735 | if (res != 0) barf("init_libc_tsd_keys: lock"); |
| 1736 | |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame] | 1737 | /* Now test again, to be sure there is no mistake. */ |
| 1738 | if (libc_specifics_inited != 0) { |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1739 | res = __pthread_mutex_unlock(&libc_specifics_inited_mx); |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame] | 1740 | if (res != 0) barf("init_libc_tsd_keys: unlock(1)"); |
| 1741 | return; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1742 | } |
| 1743 | |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame] | 1744 | /* Actually do the initialisation. */ |
| 1745 | /* printf("INIT libc specifics\n"); */ |
| 1746 | for (i = 0; i < _LIBC_TSD_KEY_N; i++) { |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1747 | res = __pthread_key_create(&k, NULL); |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame] | 1748 | if (res != 0) barf("init_libc_tsd_keys: create"); |
| 1749 | libc_specifics_keys[i] = k; |
| 1750 | } |
| 1751 | |
| 1752 | /* Signify init done. */ |
| 1753 | libc_specifics_inited = 1; |
| 1754 | |
| 1755 | # ifdef GLIBC_2_3 |
| 1756 | /* Set the initialising thread's locale to the global (default) |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1757 | locale. A hack in support of glibc-2.3. This does the biz for |
| 1758 | the root thread. For all other threads we run this in |
| 1759 | thread_wrapper(), which does the real work of |
| 1760 | pthread_create(). */ |
| 1761 | /* assert that we are the root thread. I don't know if this is |
| 1762 | really a valid assertion to make; if it breaks I'll reconsider |
| 1763 | it. */ |
| 1764 | my_assert(pthread_self() == 1); |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame] | 1765 | __uselocale(LC_GLOBAL_LOCALE); |
| 1766 | # endif |
| 1767 | |
| 1768 | /* Unlock and return. */ |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1769 | res = __pthread_mutex_unlock(&libc_specifics_inited_mx); |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1770 | if (res != 0) barf("init_libc_tsd_keys: unlock"); |
| 1771 | } |
| 1772 | |
| 1773 | |
| 1774 | static int |
| 1775 | libc_internal_tsd_set ( enum __libc_tsd_key_t key, |
| 1776 | const void * pointer ) |
| 1777 | { |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1778 | int res; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1779 | /* printf("SET SET SET key %d ptr %p\n", key, pointer); */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1780 | if (key < _LIBC_TSD_KEY_MALLOC || key >= _LIBC_TSD_KEY_N) |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1781 | barf("libc_internal_tsd_set: invalid key"); |
| 1782 | init_libc_tsd_keys(); |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1783 | res = __pthread_setspecific(libc_specifics_keys[key], pointer); |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1784 | if (res != 0) barf("libc_internal_tsd_set: setspecific failed"); |
| 1785 | return 0; |
| 1786 | } |
| 1787 | |
| 1788 | static void * |
| 1789 | libc_internal_tsd_get ( enum __libc_tsd_key_t key ) |
| 1790 | { |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1791 | void* v; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1792 | /* printf("GET GET GET key %d\n", key); */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1793 | if (key < _LIBC_TSD_KEY_MALLOC || key >= _LIBC_TSD_KEY_N) |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1794 | barf("libc_internal_tsd_get: invalid key"); |
| 1795 | init_libc_tsd_keys(); |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1796 | v = __pthread_getspecific(libc_specifics_keys[key]); |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1797 | /* if (v == NULL) barf("libc_internal_tsd_set: getspecific failed"); */ |
| 1798 | return v; |
| 1799 | } |
| 1800 | |
| 1801 | |
sewardj | 70adeb2 | 2002-04-27 01:35:38 +0000 | [diff] [blame] | 1802 | int (*__libc_internal_tsd_set) |
| 1803 | (enum __libc_tsd_key_t key, const void * pointer) |
| 1804 | = libc_internal_tsd_set; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1805 | |
sewardj | 70adeb2 | 2002-04-27 01:35:38 +0000 | [diff] [blame] | 1806 | void* (*__libc_internal_tsd_get) |
| 1807 | (enum __libc_tsd_key_t key) |
| 1808 | = libc_internal_tsd_get; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1809 | |
| 1810 | |
sewardj | 00a66b1 | 2002-10-12 16:42:35 +0000 | [diff] [blame] | 1811 | #ifdef GLIBC_2_3 |
| 1812 | /* This one was first spotted be me in the glibc-2.2.93 sources. */ |
| 1813 | static void** |
| 1814 | libc_internal_tsd_address ( enum __libc_tsd_key_t key ) |
| 1815 | { |
| 1816 | void** v; |
| 1817 | /* printf("ADDR ADDR ADDR key %d\n", key); */ |
| 1818 | if (key < _LIBC_TSD_KEY_MALLOC || key >= _LIBC_TSD_KEY_N) |
| 1819 | barf("libc_internal_tsd_address: invalid key"); |
| 1820 | init_libc_tsd_keys(); |
| 1821 | v = __pthread_getspecific_addr(libc_specifics_keys[key]); |
| 1822 | return v; |
| 1823 | } |
| 1824 | |
| 1825 | void ** (*__libc_internal_tsd_address) |
| 1826 | (enum __libc_tsd_key_t key) |
| 1827 | = libc_internal_tsd_address; |
| 1828 | #endif |
| 1829 | |
| 1830 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1831 | /* --------------------------------------------------------------------- |
| 1832 | These are here (I think) because they are deemed cancellation |
| 1833 | points by POSIX. For the moment we'll simply pass the call along |
| 1834 | to the corresponding thread-unaware (?) libc routine. |
| 1835 | ------------------------------------------------------------------ */ |
| 1836 | |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 1837 | #ifdef GLIBC_2_1 |
| 1838 | extern |
| 1839 | int __sigaction |
| 1840 | (int signum, |
| 1841 | const struct sigaction *act, |
| 1842 | struct sigaction *oldact); |
| 1843 | #else |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1844 | extern |
| 1845 | int __libc_sigaction |
| 1846 | (int signum, |
| 1847 | const struct sigaction *act, |
| 1848 | struct sigaction *oldact); |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 1849 | #endif |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1850 | int sigaction(int signum, |
| 1851 | const struct sigaction *act, |
| 1852 | struct sigaction *oldact) |
| 1853 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1854 | __my_pthread_testcancel(); |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 1855 | # ifdef GLIBC_2_1 |
| 1856 | return __sigaction(signum, act, oldact); |
| 1857 | # else |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1858 | return __libc_sigaction(signum, act, oldact); |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 1859 | # endif |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1860 | } |
| 1861 | |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1862 | extern |
| 1863 | int __libc_accept(int fd, struct sockaddr *addr, socklen_t *len); |
| 1864 | |
| 1865 | WEAK int __accept(int fd, struct sockaddr *addr, socklen_t *len) |
| 1866 | { |
| 1867 | __my_pthread_testcancel(); |
| 1868 | return __libc_accept(fd, addr, len); |
| 1869 | } |
| 1870 | strong_alias(__accept, accept); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1871 | |
| 1872 | extern |
| 1873 | int __libc_connect(int sockfd, |
| 1874 | const struct sockaddr *serv_addr, |
| 1875 | socklen_t addrlen); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1876 | WEAK |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1877 | int connect(int sockfd, |
| 1878 | const struct sockaddr *serv_addr, |
| 1879 | socklen_t addrlen) |
| 1880 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1881 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1882 | return __libc_connect(sockfd, serv_addr, addrlen); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1883 | } |
| 1884 | |
| 1885 | |
| 1886 | extern |
| 1887 | int __libc_fcntl(int fd, int cmd, long arg); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1888 | WEAK |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1889 | int fcntl(int fd, int cmd, long arg) |
| 1890 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1891 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1892 | return __libc_fcntl(fd, cmd, arg); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1893 | } |
| 1894 | |
| 1895 | |
| 1896 | extern |
| 1897 | ssize_t __libc_write(int fd, const void *buf, size_t count); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1898 | WEAK |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1899 | ssize_t write(int fd, const void *buf, size_t count) |
| 1900 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1901 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1902 | return __libc_write(fd, buf, count); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1903 | } |
| 1904 | |
| 1905 | |
| 1906 | extern |
| 1907 | ssize_t __libc_read(int fd, void *buf, size_t count); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1908 | WEAK |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1909 | ssize_t read(int fd, void *buf, size_t count) |
| 1910 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1911 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1912 | return __libc_read(fd, buf, count); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1913 | } |
| 1914 | |
sewardj | f912dfc | 2002-11-13 21:51:10 +0000 | [diff] [blame] | 1915 | extern |
| 1916 | int __libc_open64(const char *pathname, int flags, mode_t mode); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1917 | /* WEAK */ |
sewardj | f912dfc | 2002-11-13 21:51:10 +0000 | [diff] [blame] | 1918 | int open64(const char *pathname, int flags, mode_t mode) |
| 1919 | { |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1920 | return __libc_open64(pathname, flags, mode); |
sewardj | f912dfc | 2002-11-13 21:51:10 +0000 | [diff] [blame] | 1921 | } |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1922 | |
| 1923 | extern |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1924 | int __libc_open(const char *pathname, int flags, mode_t mode); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1925 | /* WEAK */ |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1926 | int open(const char *pathname, int flags, mode_t mode) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1927 | { |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1928 | return __libc_open(pathname, flags, mode); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1929 | } |
| 1930 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1931 | extern |
| 1932 | int __libc_close(int fd); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1933 | WEAK |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1934 | int close(int fd) |
| 1935 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1936 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1937 | return __libc_close(fd); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1938 | } |
| 1939 | |
| 1940 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1941 | extern |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1942 | pid_t __libc_waitpid(pid_t pid, int *status, int options); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1943 | WEAK |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1944 | pid_t waitpid(pid_t pid, int *status, int options) |
| 1945 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1946 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1947 | return __libc_waitpid(pid, status, options); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1948 | } |
| 1949 | |
| 1950 | |
| 1951 | extern |
| 1952 | int __libc_nanosleep(const struct timespec *req, struct timespec *rem); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1953 | WEAK |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1954 | int __nanosleep(const struct timespec *req, struct timespec *rem) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1955 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1956 | __my_pthread_testcancel(); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1957 | return __libc_nanosleep(req, rem); |
| 1958 | } |
| 1959 | |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 1960 | extern |
| 1961 | int __libc_pause(void); |
| 1962 | WEAK |
| 1963 | int __pause(void) |
| 1964 | { |
| 1965 | __my_pthread_testcancel(); |
| 1966 | return __libc_pause(); |
| 1967 | } |
| 1968 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1969 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1970 | extern |
| 1971 | int __libc_fsync(int fd); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1972 | WEAK |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1973 | int fsync(int fd) |
| 1974 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1975 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1976 | return __libc_fsync(fd); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1977 | } |
| 1978 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1979 | |
sewardj | 70c7536 | 2002-04-13 04:18:32 +0000 | [diff] [blame] | 1980 | extern |
| 1981 | off_t __libc_lseek(int fildes, off_t offset, int whence); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1982 | WEAK |
sewardj | 70c7536 | 2002-04-13 04:18:32 +0000 | [diff] [blame] | 1983 | off_t lseek(int fildes, off_t offset, int whence) |
| 1984 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1985 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1986 | return __libc_lseek(fildes, offset, whence); |
sewardj | 70c7536 | 2002-04-13 04:18:32 +0000 | [diff] [blame] | 1987 | } |
| 1988 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1989 | |
| 1990 | extern |
| 1991 | __off64_t __libc_lseek64(int fildes, __off64_t offset, int whence); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 1992 | WEAK |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1993 | __off64_t lseek64(int fildes, __off64_t offset, int whence) |
| 1994 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1995 | __my_pthread_testcancel(); |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1996 | return __libc_lseek64(fildes, offset, whence); |
| 1997 | } |
| 1998 | |
| 1999 | |
sewardj | 726c412 | 2002-05-16 23:39:10 +0000 | [diff] [blame] | 2000 | extern |
| 2001 | ssize_t __libc_pread64 (int __fd, void *__buf, size_t __nbytes, |
| 2002 | __off64_t __offset); |
| 2003 | ssize_t __pread64 (int __fd, void *__buf, size_t __nbytes, |
| 2004 | __off64_t __offset) |
| 2005 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2006 | __my_pthread_testcancel(); |
sewardj | 726c412 | 2002-05-16 23:39:10 +0000 | [diff] [blame] | 2007 | return __libc_pread64(__fd, __buf, __nbytes, __offset); |
| 2008 | } |
| 2009 | |
| 2010 | |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 2011 | extern |
| 2012 | ssize_t __libc_pwrite64 (int __fd, const void *__buf, size_t __nbytes, |
| 2013 | __off64_t __offset); |
| 2014 | ssize_t __pwrite64 (int __fd, const void *__buf, size_t __nbytes, |
| 2015 | __off64_t __offset) |
| 2016 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2017 | __my_pthread_testcancel(); |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 2018 | return __libc_pwrite64(__fd, __buf, __nbytes, __offset); |
| 2019 | } |
| 2020 | |
sewardj | 726c412 | 2002-05-16 23:39:10 +0000 | [diff] [blame] | 2021 | |
sewardj | 39b93b1 | 2002-05-18 10:56:27 +0000 | [diff] [blame] | 2022 | extern |
| 2023 | ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 2024 | WEAK |
sewardj | 39b93b1 | 2002-05-18 10:56:27 +0000 | [diff] [blame] | 2025 | ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset) |
| 2026 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2027 | __my_pthread_testcancel(); |
sewardj | 39b93b1 | 2002-05-18 10:56:27 +0000 | [diff] [blame] | 2028 | return __libc_pwrite(fd, buf, count, offset); |
| 2029 | } |
| 2030 | |
| 2031 | |
| 2032 | extern |
| 2033 | ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 2034 | WEAK |
sewardj | 39b93b1 | 2002-05-18 10:56:27 +0000 | [diff] [blame] | 2035 | ssize_t pread(int fd, void *buf, size_t count, off_t offset) |
| 2036 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2037 | __my_pthread_testcancel(); |
sewardj | 39b93b1 | 2002-05-18 10:56:27 +0000 | [diff] [blame] | 2038 | return __libc_pread(fd, buf, count, offset); |
| 2039 | } |
| 2040 | |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 2041 | extern |
| 2042 | int __libc_recv(int s, void *msg, size_t len, int flags); |
| 2043 | WEAK |
| 2044 | int recv(int s, void *msg, size_t len, int flags) |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 2045 | { |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 2046 | __my_pthread_testcancel(); |
| 2047 | return __libc_recv(s, msg, len, flags); |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 2048 | } |
| 2049 | |
| 2050 | extern |
| 2051 | int __libc_send(int s, const void *msg, size_t len, int flags); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 2052 | WEAK |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 2053 | int send(int s, const void *msg, size_t len, int flags) |
| 2054 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2055 | __my_pthread_testcancel(); |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 2056 | return __libc_send(s, msg, len, flags); |
| 2057 | } |
| 2058 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 2059 | |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 2060 | extern |
| 2061 | int __libc_sendmsg(int s, const struct msghdr *msg, int flags); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 2062 | WEAK |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 2063 | int sendmsg(int s, const struct msghdr *msg, int flags) |
| 2064 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2065 | __my_pthread_testcancel(); |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 2066 | return __libc_sendmsg(s, msg, flags); |
| 2067 | } |
| 2068 | |
| 2069 | |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 2070 | extern |
sewardj | 59da27a | 2002-06-06 08:33:54 +0000 | [diff] [blame] | 2071 | int __libc_recvmsg(int s, struct msghdr *msg, int flags); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 2072 | WEAK |
sewardj | 59da27a | 2002-06-06 08:33:54 +0000 | [diff] [blame] | 2073 | int recvmsg(int s, struct msghdr *msg, int flags) |
| 2074 | { |
| 2075 | __my_pthread_testcancel(); |
| 2076 | return __libc_recvmsg(s, msg, flags); |
| 2077 | } |
| 2078 | |
| 2079 | |
| 2080 | extern |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 2081 | int __libc_recvfrom(int s, void *buf, size_t len, int flags, |
| 2082 | struct sockaddr *from, socklen_t *fromlen); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 2083 | WEAK |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 2084 | int recvfrom(int s, void *buf, size_t len, int flags, |
| 2085 | struct sockaddr *from, socklen_t *fromlen) |
| 2086 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2087 | __my_pthread_testcancel(); |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 2088 | return __libc_recvfrom(s, buf, len, flags, from, fromlen); |
| 2089 | } |
| 2090 | |
| 2091 | |
| 2092 | extern |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 2093 | int __libc_sendto(int s, const void *msg, size_t len, int flags, |
| 2094 | const struct sockaddr *to, socklen_t tolen); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 2095 | WEAK |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 2096 | int sendto(int s, const void *msg, size_t len, int flags, |
| 2097 | const struct sockaddr *to, socklen_t tolen) |
| 2098 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2099 | __my_pthread_testcancel(); |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 2100 | return __libc_sendto(s, msg, len, flags, to, tolen); |
| 2101 | } |
| 2102 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 2103 | |
sewardj | 369b170 | 2002-04-24 13:28:15 +0000 | [diff] [blame] | 2104 | extern |
| 2105 | int __libc_system(const char* str); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 2106 | WEAK |
sewardj | 369b170 | 2002-04-24 13:28:15 +0000 | [diff] [blame] | 2107 | int system(const char* str) |
| 2108 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2109 | __my_pthread_testcancel(); |
sewardj | 369b170 | 2002-04-24 13:28:15 +0000 | [diff] [blame] | 2110 | return __libc_system(str); |
| 2111 | } |
| 2112 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 2113 | |
sewardj | ab0b1c3 | 2002-04-24 19:26:47 +0000 | [diff] [blame] | 2114 | extern |
| 2115 | pid_t __libc_wait(int *status); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 2116 | WEAK |
sewardj | ab0b1c3 | 2002-04-24 19:26:47 +0000 | [diff] [blame] | 2117 | pid_t wait(int *status) |
| 2118 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2119 | __my_pthread_testcancel(); |
sewardj | ab0b1c3 | 2002-04-24 19:26:47 +0000 | [diff] [blame] | 2120 | return __libc_wait(status); |
| 2121 | } |
| 2122 | |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 2123 | |
sewardj | 67f1d58 | 2002-05-24 02:11:32 +0000 | [diff] [blame] | 2124 | extern |
| 2125 | int __libc_msync(const void *start, size_t length, int flags); |
sewardj | 11f0bb4 | 2003-04-26 20:11:15 +0000 | [diff] [blame] | 2126 | WEAK |
sewardj | 67f1d58 | 2002-05-24 02:11:32 +0000 | [diff] [blame] | 2127 | int msync(const void *start, size_t length, int flags) |
| 2128 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2129 | __my_pthread_testcancel(); |
sewardj | 67f1d58 | 2002-05-24 02:11:32 +0000 | [diff] [blame] | 2130 | return __libc_msync(start, length, flags); |
| 2131 | } |
| 2132 | |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 2133 | strong_alias(close, __close) |
| 2134 | strong_alias(fcntl, __fcntl) |
| 2135 | strong_alias(lseek, __lseek) |
| 2136 | strong_alias(open, __open) |
| 2137 | strong_alias(open64, __open64) |
| 2138 | strong_alias(read, __read) |
| 2139 | strong_alias(wait, __wait) |
| 2140 | strong_alias(write, __write) |
| 2141 | strong_alias(connect, __connect) |
| 2142 | strong_alias(send, __send) |
| 2143 | |
| 2144 | weak_alias (__pread64, pread64) |
| 2145 | weak_alias (__pwrite64, pwrite64) |
| 2146 | weak_alias(__nanosleep, nanosleep) |
| 2147 | weak_alias(__pause, pause) |
| 2148 | |
| 2149 | |
| 2150 | extern |
| 2151 | void __libc_longjmp(jmp_buf env, int val) __attribute((noreturn)); |
| 2152 | /* not weak: WEAK */ |
| 2153 | void longjmp(jmp_buf env, int val) |
| 2154 | { |
| 2155 | __libc_longjmp(env, val); |
| 2156 | } |
| 2157 | |
| 2158 | |
| 2159 | extern void __libc_siglongjmp (sigjmp_buf env, int val) |
| 2160 | __attribute__ ((noreturn)); |
| 2161 | void siglongjmp(sigjmp_buf env, int val) |
| 2162 | { |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 2163 | kludged("siglongjmp", "(it ignores cleanup handlers)"); |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 2164 | __libc_siglongjmp(env, val); |
| 2165 | } |
| 2166 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2167 | |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 2168 | /*--- fork and its helper ---*/ |
| 2169 | |
| 2170 | static |
| 2171 | void run_fork_handlers ( int what ) |
| 2172 | { |
| 2173 | ForkHandlerEntry entry; |
| 2174 | int n_h, n_handlers, i, res; |
| 2175 | |
| 2176 | my_assert(what == 0 || what == 1 || what == 2); |
| 2177 | |
| 2178 | /* Fetch old counter */ |
| 2179 | VALGRIND_MAGIC_SEQUENCE(n_handlers, -2 /* default */, |
| 2180 | VG_USERREQ__GET_FHSTACK_USED, |
| 2181 | 0, 0, 0, 0); |
| 2182 | my_assert(n_handlers >= 0 && n_handlers < VG_N_FORKHANDLERSTACK); |
| 2183 | |
| 2184 | /* Prepare handlers (what == 0) are called in opposite order of |
| 2185 | calls to pthread_atfork. Parent and child handlers are called |
| 2186 | in the same order as calls to pthread_atfork. */ |
| 2187 | if (what == 0) |
| 2188 | n_h = n_handlers - 1; |
| 2189 | else |
| 2190 | n_h = 0; |
| 2191 | |
| 2192 | for (i = 0; i < n_handlers; i++) { |
| 2193 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 2194 | VG_USERREQ__GET_FHSTACK_ENTRY, |
| 2195 | n_h, &entry, 0, 0); |
| 2196 | my_assert(res == 0); |
| 2197 | switch (what) { |
| 2198 | case 0: if (entry.prepare) entry.prepare(); |
| 2199 | n_h--; break; |
| 2200 | case 1: if (entry.parent) entry.parent(); |
| 2201 | n_h++; break; |
| 2202 | case 2: if (entry.child) entry.child(); |
| 2203 | n_h++; break; |
| 2204 | default: barf("run_fork_handlers: invalid what"); |
| 2205 | } |
| 2206 | } |
| 2207 | |
| 2208 | if (what != 0 /* prepare */) { |
| 2209 | /* Empty out the stack. */ |
| 2210 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 2211 | VG_USERREQ__SET_FHSTACK_USED, |
| 2212 | 0, 0, 0, 0); |
| 2213 | my_assert(res == 0); |
| 2214 | } |
| 2215 | } |
| 2216 | |
| 2217 | extern |
| 2218 | pid_t __libc_fork(void); |
| 2219 | pid_t __fork(void) |
| 2220 | { |
| 2221 | pid_t pid; |
| 2222 | __my_pthread_testcancel(); |
| 2223 | __pthread_mutex_lock(&pthread_atfork_lock); |
| 2224 | |
| 2225 | run_fork_handlers(0 /* prepare */); |
| 2226 | pid = __libc_fork(); |
| 2227 | if (pid == 0) { |
| 2228 | /* I am the child */ |
| 2229 | run_fork_handlers(2 /* child */); |
sewardj | d8acdf2 | 2002-11-13 21:57:52 +0000 | [diff] [blame] | 2230 | __pthread_mutex_unlock(&pthread_atfork_lock); |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 2231 | __pthread_mutex_init(&pthread_atfork_lock, NULL); |
| 2232 | } else { |
| 2233 | /* I am the parent */ |
| 2234 | run_fork_handlers(1 /* parent */); |
| 2235 | __pthread_mutex_unlock(&pthread_atfork_lock); |
| 2236 | } |
| 2237 | return pid; |
| 2238 | } |
| 2239 | |
| 2240 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2241 | pid_t __vfork(void) |
| 2242 | { |
| 2243 | return __fork(); |
| 2244 | } |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 2245 | |
| 2246 | |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2247 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2248 | /* --------------------------------------------------------------------- |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2249 | Hacky implementation of semaphores. |
| 2250 | ------------------------------------------------------------------ */ |
| 2251 | |
| 2252 | #include <semaphore.h> |
| 2253 | |
| 2254 | /* This is a terrible way to do the remapping. Plan is to import an |
| 2255 | AVL tree at some point. */ |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2256 | |
| 2257 | typedef |
| 2258 | struct { |
| 2259 | pthread_mutex_t se_mx; |
| 2260 | pthread_cond_t se_cv; |
| 2261 | int count; |
| 2262 | } |
| 2263 | vg_sem_t; |
| 2264 | |
| 2265 | static pthread_mutex_t se_remap_mx = PTHREAD_MUTEX_INITIALIZER; |
| 2266 | |
| 2267 | static int se_remap_used = 0; |
| 2268 | static sem_t* se_remap_orig[VG_N_SEMAPHORES]; |
| 2269 | static vg_sem_t se_remap_new[VG_N_SEMAPHORES]; |
| 2270 | |
| 2271 | static vg_sem_t* se_remap ( sem_t* orig ) |
| 2272 | { |
| 2273 | int res, i; |
| 2274 | res = __pthread_mutex_lock(&se_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2275 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2276 | |
| 2277 | for (i = 0; i < se_remap_used; i++) { |
| 2278 | if (se_remap_orig[i] == orig) |
| 2279 | break; |
| 2280 | } |
| 2281 | if (i == se_remap_used) { |
| 2282 | if (se_remap_used == VG_N_SEMAPHORES) { |
| 2283 | res = pthread_mutex_unlock(&se_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2284 | my_assert(res == 0); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2285 | barf("VG_N_SEMAPHORES is too low. Increase and recompile."); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2286 | } |
| 2287 | se_remap_used++; |
| 2288 | se_remap_orig[i] = orig; |
| 2289 | /* printf("allocated semaphore %d\n", i); */ |
| 2290 | } |
| 2291 | res = __pthread_mutex_unlock(&se_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2292 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2293 | return &se_remap_new[i]; |
| 2294 | } |
| 2295 | |
| 2296 | |
| 2297 | int sem_init(sem_t *sem, int pshared, unsigned int value) |
| 2298 | { |
| 2299 | int res; |
| 2300 | vg_sem_t* vg_sem; |
| 2301 | ensure_valgrind("sem_init"); |
| 2302 | if (pshared != 0) { |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 2303 | pthread_error("sem_init: unsupported pshared value"); |
sewardj | 25418ae | 2003-05-09 23:40:34 +0000 | [diff] [blame] | 2304 | *(__errno_location()) = ENOSYS; |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2305 | return -1; |
| 2306 | } |
| 2307 | vg_sem = se_remap(sem); |
| 2308 | res = pthread_mutex_init(&vg_sem->se_mx, NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2309 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2310 | res = pthread_cond_init(&vg_sem->se_cv, NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2311 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2312 | vg_sem->count = value; |
| 2313 | return 0; |
| 2314 | } |
| 2315 | |
| 2316 | |
| 2317 | int sem_wait ( sem_t* sem ) |
| 2318 | { |
| 2319 | int res; |
| 2320 | vg_sem_t* vg_sem; |
| 2321 | ensure_valgrind("sem_wait"); |
| 2322 | vg_sem = se_remap(sem); |
| 2323 | res = __pthread_mutex_lock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2324 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2325 | while (vg_sem->count == 0) { |
| 2326 | res = pthread_cond_wait(&vg_sem->se_cv, &vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2327 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2328 | } |
| 2329 | vg_sem->count--; |
| 2330 | res = __pthread_mutex_unlock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2331 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2332 | return 0; |
| 2333 | } |
| 2334 | |
| 2335 | int sem_post ( sem_t* sem ) |
| 2336 | { |
| 2337 | int res; |
| 2338 | vg_sem_t* vg_sem; |
| 2339 | ensure_valgrind("sem_post"); |
| 2340 | vg_sem = se_remap(sem); |
| 2341 | res = __pthread_mutex_lock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2342 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2343 | if (vg_sem->count == 0) { |
| 2344 | vg_sem->count++; |
| 2345 | res = pthread_cond_broadcast(&vg_sem->se_cv); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2346 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2347 | } else { |
| 2348 | vg_sem->count++; |
| 2349 | } |
| 2350 | res = __pthread_mutex_unlock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2351 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2352 | return 0; |
| 2353 | } |
| 2354 | |
| 2355 | |
| 2356 | int sem_trywait ( sem_t* sem ) |
| 2357 | { |
| 2358 | int ret, res; |
| 2359 | vg_sem_t* vg_sem; |
| 2360 | ensure_valgrind("sem_trywait"); |
| 2361 | vg_sem = se_remap(sem); |
| 2362 | res = __pthread_mutex_lock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2363 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2364 | if (vg_sem->count > 0) { |
| 2365 | vg_sem->count--; |
| 2366 | ret = 0; |
| 2367 | } else { |
| 2368 | ret = -1; |
sewardj | 25418ae | 2003-05-09 23:40:34 +0000 | [diff] [blame] | 2369 | *(__errno_location()) = EAGAIN; |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2370 | } |
| 2371 | res = __pthread_mutex_unlock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2372 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2373 | return ret; |
| 2374 | } |
| 2375 | |
| 2376 | |
| 2377 | int sem_getvalue(sem_t* sem, int * sval) |
| 2378 | { |
| 2379 | vg_sem_t* vg_sem; |
| 2380 | ensure_valgrind("sem_trywait"); |
| 2381 | vg_sem = se_remap(sem); |
| 2382 | *sval = vg_sem->count; |
| 2383 | return 0; |
| 2384 | } |
| 2385 | |
| 2386 | |
| 2387 | int sem_destroy(sem_t * sem) |
| 2388 | { |
nethercote | aad8c19 | 2003-11-20 14:23:09 +0000 | [diff] [blame^] | 2389 | kludged("sem_destroy", "(it always succeeds, even if semaphore waited on)"); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2390 | /* if someone waiting on this semaphore, errno = EBUSY, return -1 */ |
| 2391 | return 0; |
| 2392 | } |
| 2393 | |
sewardj | 9ad92d9 | 2002-10-16 19:45:06 +0000 | [diff] [blame] | 2394 | |
| 2395 | int sem_timedwait(sem_t* sem, const struct timespec *abstime) |
| 2396 | { |
| 2397 | int res; |
| 2398 | vg_sem_t* vg_sem; |
| 2399 | ensure_valgrind("sem_timedwait"); |
| 2400 | vg_sem = se_remap(sem); |
| 2401 | res = __pthread_mutex_lock(&vg_sem->se_mx); |
| 2402 | my_assert(res == 0); |
| 2403 | while ( vg_sem->count == 0 && res != ETIMEDOUT ) { |
| 2404 | res = pthread_cond_timedwait(&vg_sem->se_cv, &vg_sem->se_mx, abstime); |
| 2405 | } |
| 2406 | if ( vg_sem->count > 0 ) { |
| 2407 | vg_sem->count--; |
| 2408 | res = __pthread_mutex_unlock(&vg_sem->se_mx); |
| 2409 | my_assert(res == 0 ); |
| 2410 | return 0; |
| 2411 | } else { |
| 2412 | res = __pthread_mutex_unlock(&vg_sem->se_mx); |
| 2413 | my_assert(res == 0 ); |
| 2414 | *(__errno_location()) = ETIMEDOUT; |
| 2415 | return -1; |
| 2416 | } |
| 2417 | } |
| 2418 | |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2419 | |
| 2420 | /* --------------------------------------------------------------------- |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2421 | Reader-writer locks. |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2422 | ------------------------------------------------------------------ */ |
| 2423 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2424 | typedef |
| 2425 | struct { |
| 2426 | int initted; /* != 0 --> in use; sanity check only */ |
| 2427 | int prefer_w; /* != 0 --> prefer writer */ |
| 2428 | int nwait_r; /* # of waiting readers */ |
| 2429 | int nwait_w; /* # of waiting writers */ |
| 2430 | pthread_cond_t cv_r; /* for signalling readers */ |
| 2431 | pthread_cond_t cv_w; /* for signalling writers */ |
| 2432 | pthread_mutex_t mx; |
| 2433 | int status; |
| 2434 | /* allowed range for status: >= -1. -1 means 1 writer currently |
| 2435 | active, >= 0 means N readers currently active. */ |
| 2436 | } |
| 2437 | vg_rwlock_t; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2438 | |
| 2439 | |
| 2440 | static pthread_mutex_t rw_remap_mx = PTHREAD_MUTEX_INITIALIZER; |
| 2441 | |
| 2442 | static int rw_remap_used = 0; |
| 2443 | static pthread_rwlock_t* rw_remap_orig[VG_N_RWLOCKS]; |
| 2444 | static vg_rwlock_t rw_remap_new[VG_N_RWLOCKS]; |
| 2445 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2446 | |
| 2447 | static |
| 2448 | void init_vg_rwlock ( vg_rwlock_t* vg_rwl ) |
| 2449 | { |
| 2450 | int res = 0; |
| 2451 | vg_rwl->initted = 1; |
| 2452 | vg_rwl->prefer_w = 1; |
| 2453 | vg_rwl->nwait_r = 0; |
| 2454 | vg_rwl->nwait_w = 0; |
| 2455 | vg_rwl->status = 0; |
| 2456 | res = pthread_mutex_init(&vg_rwl->mx, NULL); |
| 2457 | res |= pthread_cond_init(&vg_rwl->cv_r, NULL); |
| 2458 | res |= pthread_cond_init(&vg_rwl->cv_w, NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2459 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2460 | } |
| 2461 | |
| 2462 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2463 | /* Take the address of a LinuxThreads rwlock_t and return the shadow |
| 2464 | address of our version. Further, if the LinuxThreads version |
| 2465 | appears to have been statically initialised, do the same to the one |
| 2466 | we allocate here. The pthread_rwlock_t.__rw_readers field is set |
| 2467 | to zero by PTHREAD_RWLOCK_INITIALIZER, so we take zero as meaning |
| 2468 | uninitialised and non-zero meaning initialised. |
| 2469 | */ |
| 2470 | static vg_rwlock_t* rw_remap ( pthread_rwlock_t* orig ) |
| 2471 | { |
| 2472 | int res, i; |
| 2473 | vg_rwlock_t* vg_rwl; |
| 2474 | res = __pthread_mutex_lock(&rw_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2475 | my_assert(res == 0); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2476 | |
| 2477 | for (i = 0; i < rw_remap_used; i++) { |
| 2478 | if (rw_remap_orig[i] == orig) |
| 2479 | break; |
| 2480 | } |
| 2481 | if (i == rw_remap_used) { |
| 2482 | if (rw_remap_used == VG_N_RWLOCKS) { |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2483 | res = __pthread_mutex_unlock(&rw_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2484 | my_assert(res == 0); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2485 | barf("VG_N_RWLOCKS is too low. Increase and recompile."); |
| 2486 | } |
| 2487 | rw_remap_used++; |
| 2488 | rw_remap_orig[i] = orig; |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2489 | rw_remap_new[i].initted = 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2490 | if (0) printf("allocated rwlock %d\n", i); |
| 2491 | } |
| 2492 | res = __pthread_mutex_unlock(&rw_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2493 | my_assert(res == 0); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2494 | vg_rwl = &rw_remap_new[i]; |
| 2495 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2496 | /* Initialise the shadow, if required. */ |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2497 | if (orig->__rw_readers == 0) { |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2498 | orig->__rw_readers = 1; |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2499 | init_vg_rwlock(vg_rwl); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2500 | if (orig->__rw_kind == PTHREAD_RWLOCK_PREFER_READER_NP) |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2501 | vg_rwl->prefer_w = 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2502 | } |
| 2503 | |
| 2504 | return vg_rwl; |
| 2505 | } |
| 2506 | |
| 2507 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2508 | int pthread_rwlock_init ( pthread_rwlock_t* orig, |
| 2509 | const pthread_rwlockattr_t* attr ) |
| 2510 | { |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2511 | vg_rwlock_t* rwl; |
| 2512 | if (0) printf ("pthread_rwlock_init\n"); |
| 2513 | /* Force the remapper to initialise the shadow. */ |
| 2514 | orig->__rw_readers = 0; |
| 2515 | /* Install the lock preference; the remapper needs to know it. */ |
| 2516 | orig->__rw_kind = PTHREAD_RWLOCK_DEFAULT_NP; |
| 2517 | if (attr) |
| 2518 | orig->__rw_kind = attr->__lockkind; |
| 2519 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2520 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2521 | } |
| 2522 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2523 | |
| 2524 | static |
| 2525 | void pthread_rwlock_rdlock_CANCEL_HDLR ( void* rwl_v ) |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2526 | { |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2527 | vg_rwlock_t* rwl = (vg_rwlock_t*)rwl_v; |
| 2528 | rwl->nwait_r--; |
| 2529 | pthread_mutex_unlock (&rwl->mx); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2530 | } |
| 2531 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2532 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2533 | int pthread_rwlock_rdlock ( pthread_rwlock_t* orig ) |
| 2534 | { |
| 2535 | int res; |
| 2536 | vg_rwlock_t* rwl; |
| 2537 | if (0) printf ("pthread_rwlock_rdlock\n"); |
| 2538 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2539 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2540 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2541 | if (!rwl->initted) { |
| 2542 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2543 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2544 | return EINVAL; |
| 2545 | } |
| 2546 | if (rwl->status < 0) { |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2547 | my_assert(rwl->status == -1); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2548 | rwl->nwait_r++; |
| 2549 | pthread_cleanup_push( pthread_rwlock_rdlock_CANCEL_HDLR, rwl ); |
| 2550 | while (1) { |
| 2551 | if (rwl->status == 0) break; |
| 2552 | res = pthread_cond_wait(&rwl->cv_r, &rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2553 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2554 | } |
| 2555 | pthread_cleanup_pop(0); |
| 2556 | rwl->nwait_r--; |
| 2557 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2558 | my_assert(rwl->status >= 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2559 | rwl->status++; |
| 2560 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2561 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2562 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2563 | } |
| 2564 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2565 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2566 | int pthread_rwlock_tryrdlock ( pthread_rwlock_t* orig ) |
| 2567 | { |
| 2568 | int res; |
| 2569 | vg_rwlock_t* rwl; |
| 2570 | if (0) printf ("pthread_rwlock_tryrdlock\n"); |
| 2571 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2572 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2573 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2574 | if (!rwl->initted) { |
| 2575 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2576 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2577 | return EINVAL; |
| 2578 | } |
| 2579 | if (rwl->status == -1) { |
| 2580 | /* Writer active; we have to give up. */ |
| 2581 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2582 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2583 | return EBUSY; |
| 2584 | } |
| 2585 | /* Success */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2586 | my_assert(rwl->status >= 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2587 | rwl->status++; |
| 2588 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2589 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2590 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2591 | } |
| 2592 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2593 | |
| 2594 | static |
| 2595 | void pthread_rwlock_wrlock_CANCEL_HDLR ( void* rwl_v ) |
| 2596 | { |
| 2597 | vg_rwlock_t* rwl = (vg_rwlock_t*)rwl_v; |
| 2598 | rwl->nwait_w--; |
| 2599 | pthread_mutex_unlock (&rwl->mx); |
| 2600 | } |
| 2601 | |
| 2602 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2603 | int pthread_rwlock_wrlock ( pthread_rwlock_t* orig ) |
| 2604 | { |
| 2605 | int res; |
| 2606 | vg_rwlock_t* rwl; |
| 2607 | if (0) printf ("pthread_rwlock_wrlock\n"); |
| 2608 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2609 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2610 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2611 | if (!rwl->initted) { |
| 2612 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2613 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2614 | return EINVAL; |
| 2615 | } |
| 2616 | if (rwl->status != 0) { |
| 2617 | rwl->nwait_w++; |
| 2618 | pthread_cleanup_push( pthread_rwlock_wrlock_CANCEL_HDLR, rwl ); |
| 2619 | while (1) { |
| 2620 | if (rwl->status == 0) break; |
| 2621 | res = pthread_cond_wait(&rwl->cv_w, &rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2622 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2623 | } |
| 2624 | pthread_cleanup_pop(0); |
| 2625 | rwl->nwait_w--; |
| 2626 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2627 | my_assert(rwl->status == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2628 | rwl->status = -1; |
| 2629 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2630 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2631 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2632 | } |
| 2633 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2634 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2635 | int pthread_rwlock_trywrlock ( pthread_rwlock_t* orig ) |
| 2636 | { |
| 2637 | int res; |
| 2638 | vg_rwlock_t* rwl; |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2639 | if (0) printf ("pthread_wrlock_trywrlock\n"); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2640 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2641 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2642 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2643 | if (!rwl->initted) { |
| 2644 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2645 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2646 | return EINVAL; |
| 2647 | } |
| 2648 | if (rwl->status != 0) { |
| 2649 | /* Reader(s) or a writer active; we have to give up. */ |
| 2650 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2651 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2652 | return EBUSY; |
| 2653 | } |
| 2654 | /* Success */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2655 | my_assert(rwl->status == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2656 | rwl->status = -1; |
| 2657 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2658 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2659 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2660 | } |
| 2661 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2662 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2663 | int pthread_rwlock_unlock ( pthread_rwlock_t* orig ) |
| 2664 | { |
| 2665 | int res; |
| 2666 | vg_rwlock_t* rwl; |
| 2667 | if (0) printf ("pthread_rwlock_unlock\n"); |
| 2668 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2669 | rwl = rw_remap ( orig ); |
| 2670 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2671 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2672 | if (!rwl->initted) { |
| 2673 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2674 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2675 | return EINVAL; |
| 2676 | } |
| 2677 | if (rwl->status == 0) { |
| 2678 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2679 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2680 | return EPERM; |
| 2681 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2682 | my_assert(rwl->status != 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2683 | if (rwl->status == -1) { |
| 2684 | rwl->status = 0; |
| 2685 | } else { |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2686 | my_assert(rwl->status > 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2687 | rwl->status--; |
| 2688 | } |
| 2689 | |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2690 | my_assert(rwl->status >= 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2691 | |
| 2692 | if (rwl->prefer_w) { |
| 2693 | |
| 2694 | /* Favour waiting writers, if any. */ |
| 2695 | if (rwl->nwait_w > 0) { |
| 2696 | /* Writer(s) are waiting. */ |
| 2697 | if (rwl->status == 0) { |
| 2698 | /* We can let a writer in. */ |
| 2699 | res = pthread_cond_signal(&rwl->cv_w); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2700 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2701 | } else { |
| 2702 | /* There are still readers active. Do nothing; eventually |
| 2703 | they will disappear, at which point a writer will be |
| 2704 | admitted. */ |
| 2705 | } |
| 2706 | } |
| 2707 | else |
| 2708 | /* No waiting writers. */ |
| 2709 | if (rwl->nwait_r > 0) { |
| 2710 | /* Let in a waiting reader. */ |
| 2711 | res = pthread_cond_signal(&rwl->cv_r); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2712 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2713 | } |
| 2714 | |
| 2715 | } else { |
| 2716 | |
| 2717 | /* Favour waiting readers, if any. */ |
| 2718 | if (rwl->nwait_r > 0) { |
| 2719 | /* Reader(s) are waiting; let one in. */ |
| 2720 | res = pthread_cond_signal(&rwl->cv_r); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2721 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2722 | } |
| 2723 | else |
| 2724 | /* No waiting readers. */ |
| 2725 | if (rwl->nwait_w > 0 && rwl->status == 0) { |
| 2726 | /* We have waiting writers and no active readers; let a |
| 2727 | writer in. */ |
| 2728 | res = pthread_cond_signal(&rwl->cv_w); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2729 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2730 | } |
| 2731 | } |
| 2732 | |
| 2733 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2734 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2735 | return 0; |
| 2736 | } |
| 2737 | |
| 2738 | |
| 2739 | int pthread_rwlock_destroy ( pthread_rwlock_t *orig ) |
| 2740 | { |
| 2741 | int res; |
| 2742 | vg_rwlock_t* rwl; |
| 2743 | if (0) printf ("pthread_rwlock_destroy\n"); |
| 2744 | rwl = rw_remap ( orig ); |
| 2745 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2746 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2747 | if (!rwl->initted) { |
| 2748 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2749 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2750 | return EINVAL; |
| 2751 | } |
| 2752 | if (rwl->status != 0 || rwl->nwait_r > 0 || rwl->nwait_w > 0) { |
| 2753 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2754 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2755 | return EBUSY; |
| 2756 | } |
| 2757 | rwl->initted = 0; |
| 2758 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2759 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2760 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2761 | } |
| 2762 | |
| 2763 | |
sewardj | 47e4e31 | 2002-06-18 09:24:34 +0000 | [diff] [blame] | 2764 | /* Copied directly from LinuxThreads. */ |
| 2765 | int |
| 2766 | pthread_rwlockattr_init (pthread_rwlockattr_t *attr) |
| 2767 | { |
| 2768 | attr->__lockkind = 0; |
| 2769 | attr->__pshared = PTHREAD_PROCESS_PRIVATE; |
| 2770 | |
| 2771 | return 0; |
| 2772 | } |
| 2773 | |
sewardj | fe18eb8 | 2002-07-13 12:58:44 +0000 | [diff] [blame] | 2774 | /* Copied directly from LinuxThreads. */ |
| 2775 | int |
sewardj | 5706bfa | 2002-12-08 23:42:17 +0000 | [diff] [blame] | 2776 | pthread_rwlockattr_destroy (pthread_rwlockattr_t *attr) |
| 2777 | { |
| 2778 | return 0; |
| 2779 | } |
| 2780 | |
| 2781 | /* Copied directly from LinuxThreads. */ |
| 2782 | int |
sewardj | fe18eb8 | 2002-07-13 12:58:44 +0000 | [diff] [blame] | 2783 | pthread_rwlockattr_setpshared (pthread_rwlockattr_t *attr, int pshared) |
| 2784 | { |
| 2785 | if (pshared != PTHREAD_PROCESS_PRIVATE && pshared != PTHREAD_PROCESS_SHARED) |
| 2786 | return EINVAL; |
| 2787 | |
| 2788 | /* For now it is not possible to shared a conditional variable. */ |
| 2789 | if (pshared != PTHREAD_PROCESS_PRIVATE) |
| 2790 | return ENOSYS; |
| 2791 | |
| 2792 | attr->__pshared = pshared; |
| 2793 | |
| 2794 | return 0; |
| 2795 | } |
| 2796 | |
sewardj | 47e4e31 | 2002-06-18 09:24:34 +0000 | [diff] [blame] | 2797 | |
sewardj | 262b5be | 2003-04-26 21:19:53 +0000 | [diff] [blame] | 2798 | |
| 2799 | /* --------------------------------------------------------------------- |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 2800 | Manage the allocation and use of RT signals. The Valgrind core |
| 2801 | uses one. glibc needs us to implement this to make RT signals |
| 2802 | work; things just seem to crash if we don't. |
sewardj | 262b5be | 2003-04-26 21:19:53 +0000 | [diff] [blame] | 2803 | ------------------------------------------------------------------ */ |
sewardj | 262b5be | 2003-04-26 21:19:53 +0000 | [diff] [blame] | 2804 | int __libc_current_sigrtmin (void) |
| 2805 | { |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 2806 | return VG_(sig_rtmin); |
sewardj | 262b5be | 2003-04-26 21:19:53 +0000 | [diff] [blame] | 2807 | } |
| 2808 | |
| 2809 | int __libc_current_sigrtmax (void) |
| 2810 | { |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 2811 | return VG_(sig_rtmax); |
sewardj | 262b5be | 2003-04-26 21:19:53 +0000 | [diff] [blame] | 2812 | } |
| 2813 | |
| 2814 | int __libc_allocate_rtsig (int high) |
| 2815 | { |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 2816 | return VG_(sig_alloc_rtsig)(high); |
sewardj | 262b5be | 2003-04-26 21:19:53 +0000 | [diff] [blame] | 2817 | } |
| 2818 | |
sewardj | d5bef57 | 2002-10-23 21:49:33 +0000 | [diff] [blame] | 2819 | /* --------------------------------------------------------------------- |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2820 | B'stard. |
| 2821 | ------------------------------------------------------------------ */ |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2822 | strong_alias(__pthread_mutex_lock, pthread_mutex_lock) |
| 2823 | strong_alias(__pthread_mutex_trylock, pthread_mutex_trylock) |
| 2824 | strong_alias(__pthread_mutex_unlock, pthread_mutex_unlock) |
| 2825 | strong_alias(__pthread_mutexattr_init, pthread_mutexattr_init) |
| 2826 | weak_alias(__pthread_mutexattr_settype, pthread_mutexattr_settype) |
sewardj | f099551 | 2003-07-06 01:29:49 +0000 | [diff] [blame] | 2827 | weak_alias(__pthread_mutexattr_setpshared, pthread_mutexattr_setpshared) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2828 | strong_alias(__pthread_mutex_init, pthread_mutex_init) |
| 2829 | strong_alias(__pthread_mutexattr_destroy, pthread_mutexattr_destroy) |
| 2830 | strong_alias(__pthread_mutex_destroy, pthread_mutex_destroy) |
| 2831 | strong_alias(__pthread_once, pthread_once) |
| 2832 | strong_alias(__pthread_atfork, pthread_atfork) |
| 2833 | strong_alias(__pthread_key_create, pthread_key_create) |
| 2834 | strong_alias(__pthread_getspecific, pthread_getspecific) |
| 2835 | strong_alias(__pthread_setspecific, pthread_setspecific) |
| 2836 | |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 2837 | #ifndef GLIBC_2_1 |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2838 | strong_alias(sigaction, __sigaction) |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 2839 | #endif |
| 2840 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2841 | weak_alias(__fork, fork) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2842 | weak_alias(__vfork, vfork) |
sewardj | f0b0645 | 2002-06-04 08:38:04 +0000 | [diff] [blame] | 2843 | weak_alias (__pthread_kill_other_threads_np, pthread_kill_other_threads_np) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2844 | |
| 2845 | /*--------------------------------------------------*/ |
| 2846 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2847 | weak_alias(pthread_rwlock_rdlock, __pthread_rwlock_rdlock) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2848 | weak_alias(pthread_rwlock_unlock, __pthread_rwlock_unlock) |
sewardj | 262b029 | 2002-05-01 00:03:16 +0000 | [diff] [blame] | 2849 | weak_alias(pthread_rwlock_wrlock, __pthread_rwlock_wrlock) |
sewardj | 060b04f | 2002-04-26 21:01:13 +0000 | [diff] [blame] | 2850 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2851 | weak_alias(pthread_rwlock_destroy, __pthread_rwlock_destroy) |
| 2852 | weak_alias(pthread_rwlock_init, __pthread_rwlock_init) |
| 2853 | weak_alias(pthread_rwlock_tryrdlock, __pthread_rwlock_tryrdlock) |
| 2854 | weak_alias(pthread_rwlock_trywrlock, __pthread_rwlock_trywrlock) |
| 2855 | |
sewardj | 060b04f | 2002-04-26 21:01:13 +0000 | [diff] [blame] | 2856 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2857 | /* I've no idea what these are, but they get called quite a lot. |
| 2858 | Anybody know? */ |
| 2859 | |
njn | ff28df9 | 2003-10-12 17:26:04 +0000 | [diff] [blame] | 2860 | #ifndef __UCLIBC__ |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2861 | #undef _IO_flockfile |
| 2862 | void _IO_flockfile ( _IO_FILE * file ) |
| 2863 | { |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 2864 | pthread_mutex_lock(file->_lock); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2865 | } |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2866 | weak_alias(_IO_flockfile, flockfile); |
| 2867 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2868 | #undef _IO_funlockfile |
| 2869 | void _IO_funlockfile ( _IO_FILE * file ) |
| 2870 | { |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 2871 | pthread_mutex_unlock(file->_lock); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2872 | } |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2873 | weak_alias(_IO_funlockfile, funlockfile); |
njn | ff28df9 | 2003-10-12 17:26:04 +0000 | [diff] [blame] | 2874 | #endif |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2875 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2876 | |
sewardj | d4f2c71 | 2002-04-30 10:20:10 +0000 | [diff] [blame] | 2877 | /* This doesn't seem to be needed to simulate libpthread.so's external |
| 2878 | interface, but many people complain about its absence. */ |
| 2879 | |
| 2880 | strong_alias(__pthread_mutexattr_settype, __pthread_mutexattr_setkind_np) |
| 2881 | weak_alias(__pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np) |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 2882 | |
sewardj | 5e657c3 | 2003-10-12 08:33:30 +0000 | [diff] [blame] | 2883 | /* POSIX spinlocks, taken from glibc linuxthreads/sysdeps/i386 */ |
| 2884 | |
| 2885 | typedef volatile int pthread_spinlock_t; /* Huh? Guarded by __USE_XOPEN2K */ |
| 2886 | |
| 2887 | int pthread_spin_init(pthread_spinlock_t *lock, int pshared) |
| 2888 | { |
| 2889 | /* We can ignore the `pshared' parameter. Since we are busy-waiting |
| 2890 | all processes which can access the memory location `lock' points |
| 2891 | to can use the spinlock. */ |
| 2892 | *lock = 1; |
| 2893 | return 0; |
| 2894 | } |
| 2895 | |
| 2896 | int pthread_spin_lock(pthread_spinlock_t *lock) |
| 2897 | { |
| 2898 | asm volatile |
| 2899 | ("\n" |
| 2900 | "1:\n\t" |
| 2901 | "lock; decl %0\n\t" |
| 2902 | "js 2f\n\t" |
| 2903 | ".section .text.spinlock,\"ax\"\n" |
| 2904 | "2:\n\t" |
| 2905 | "cmpl $0,%0\n\t" |
| 2906 | "rep; nop\n\t" |
| 2907 | "jle 2b\n\t" |
| 2908 | "jmp 1b\n\t" |
| 2909 | ".previous" |
| 2910 | : "=m" (*lock)); |
| 2911 | return 0; |
| 2912 | } |
| 2913 | |
| 2914 | int pthread_spin_unlock(pthread_spinlock_t *lock) |
| 2915 | { |
| 2916 | asm volatile |
| 2917 | ("movl $1,%0" |
| 2918 | : "=m" (*lock)); |
| 2919 | return 0; |
| 2920 | } |
| 2921 | |
| 2922 | int pthread_spin_destroy(pthread_spinlock_t *lock) |
| 2923 | { |
| 2924 | /* Nothing to do. */ |
| 2925 | return 0; |
| 2926 | } |
| 2927 | |
| 2928 | int pthread_spin_trylock(pthread_spinlock_t *lock) |
| 2929 | { |
| 2930 | int oldval; |
| 2931 | |
| 2932 | asm volatile |
| 2933 | ("xchgl %0,%1" |
| 2934 | : "=r" (oldval), "=m" (*lock) |
| 2935 | : "0" (0)); |
| 2936 | return oldval > 0 ? 0 : EBUSY; |
| 2937 | } |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 2938 | |
| 2939 | /*--------------------------------------------------------------------*/ |
| 2940 | /*--- end vg_libpthread.c ---*/ |
| 2941 | /*--------------------------------------------------------------------*/ |