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 | |
| 11 | Copyright (C) 2000-2002 Julian Seward |
| 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 | #ifdef GLIBC_2_1 |
| 66 | #include <sys/time.h> |
| 67 | #endif |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 68 | |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 69 | #include <stdio.h> |
| 70 | |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 71 | |
| 72 | /* --------------------------------------------------------------------- |
| 73 | Forwardses. |
| 74 | ------------------------------------------------------------------ */ |
| 75 | |
| 76 | static void wait_for_fd_to_be_readable_or_erring ( int fd ); |
| 77 | |
sewardj | 9a2224b | 2002-06-19 10:17:40 +0000 | [diff] [blame] | 78 | static |
| 79 | int my_do_syscall2 ( int syscallno, |
| 80 | int arg1, int arg2 ); |
| 81 | |
sewardj | 6e1543f | 2002-10-01 00:25:04 +0000 | [diff] [blame] | 82 | __attribute__((weak)) |
| 83 | ssize_t write(int fd, const void *buf, size_t count); |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 84 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 85 | /* --------------------------------------------------------------------- |
| 86 | Helpers. We have to be pretty self-sufficient. |
| 87 | ------------------------------------------------------------------ */ |
| 88 | |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 89 | /* Number of times any given error message is printed. */ |
| 90 | #define N_MOANS 3 |
| 91 | |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 92 | /* Extract from Valgrind the value of VG_(clo_trace_pthread_level). |
| 93 | Returns 0 (none) if not running on Valgrind. */ |
| 94 | static |
| 95 | int get_pt_trace_level ( void ) |
| 96 | { |
| 97 | int res; |
| 98 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 99 | VG_USERREQ__GET_PTHREAD_TRACE_LEVEL, |
| 100 | 0, 0, 0, 0); |
| 101 | return res; |
| 102 | } |
| 103 | |
| 104 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 105 | static |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 106 | void my_exit ( int arg ) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 107 | { |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 108 | int __res; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 109 | __asm__ volatile ("movl %%ecx, %%ebx ; int $0x80" |
| 110 | : "=a" (__res) |
| 111 | : "0" (__NR_exit), |
| 112 | "c" (arg) ); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 113 | /* We don't bother to mention the fact that this asm trashes %ebx, |
| 114 | since it won't return. If you ever do let it return ... fix |
| 115 | this! */ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 119 | /* We need this guy -- it's in valgrind.so. */ |
| 120 | extern void VG_(startup) ( void ); |
| 121 | |
| 122 | |
| 123 | /* Just start up Valgrind if it's not already going. VG_(startup)() |
| 124 | detects and ignores second and subsequent calls. */ |
sewardj | 604ec3c | 2002-04-18 22:38:41 +0000 | [diff] [blame] | 125 | static __inline__ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 126 | void ensure_valgrind ( char* caller ) |
| 127 | { |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 128 | VG_(startup)(); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 129 | } |
| 130 | |
sewardj | bea1caa | 2002-05-10 23:20:58 +0000 | [diff] [blame] | 131 | /* While we're at it ... hook our own startup function into this |
| 132 | game. */ |
| 133 | __asm__ ( |
| 134 | ".section .init\n" |
| 135 | "\tcall vgPlain_startup" |
| 136 | ); |
| 137 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 138 | |
| 139 | static |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 140 | __attribute__((noreturn)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 141 | void barf ( char* str ) |
| 142 | { |
| 143 | char buf[100]; |
| 144 | buf[0] = 0; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 145 | strcat(buf, "\nvalgrind's libpthread.so: "); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 146 | strcat(buf, str); |
| 147 | strcat(buf, "\n\n"); |
| 148 | write(2, buf, strlen(buf)); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 149 | my_exit(1); |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 150 | /* We have to persuade gcc into believing this doesn't return. */ |
| 151 | while (1) { }; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | |
sewardj | 2a3d28c | 2002-04-14 13:27:00 +0000 | [diff] [blame] | 155 | static void ignored ( char* msg ) |
| 156 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 157 | if (get_pt_trace_level() >= 0) { |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 158 | char* ig = "valgrind's libpthread.so: IGNORED call to: "; |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 159 | write(2, ig, strlen(ig)); |
| 160 | write(2, msg, strlen(msg)); |
| 161 | ig = "\n"; |
| 162 | write(2, ig, strlen(ig)); |
| 163 | } |
sewardj | 2a3d28c | 2002-04-14 13:27:00 +0000 | [diff] [blame] | 164 | } |
| 165 | |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 166 | static void kludged ( char* msg ) |
| 167 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 168 | if (get_pt_trace_level() >= 0) { |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 169 | char* ig = "valgrind's libpthread.so: KLUDGED call to: "; |
| 170 | write(2, ig, strlen(ig)); |
| 171 | write(2, msg, strlen(msg)); |
| 172 | ig = "\n"; |
| 173 | write(2, ig, strlen(ig)); |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | static void not_inside ( char* msg ) |
| 178 | { |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 179 | VG_(startup)(); |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 180 | } |
| 181 | |
sewardj | ccef2e6 | 2002-05-29 19:26:32 +0000 | [diff] [blame] | 182 | __attribute__((noreturn)) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 183 | void vgPlain_unimp ( char* what ) |
| 184 | { |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 185 | char* ig = "valgrind's libpthread.so: UNIMPLEMENTED FUNCTION: "; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 186 | write(2, ig, strlen(ig)); |
| 187 | write(2, what, strlen(what)); |
| 188 | ig = "\n"; |
| 189 | write(2, ig, strlen(ig)); |
| 190 | barf("Please report this bug to me at: jseward@acm.org"); |
| 191 | } |
| 192 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 193 | |
sewardj | 457cc47 | 2002-06-03 23:13:47 +0000 | [diff] [blame] | 194 | static |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 195 | void my_assert_fail ( Char* expr, Char* file, Int line, Char* fn ) |
| 196 | { |
| 197 | static Bool entered = False; |
| 198 | if (entered) |
| 199 | my_exit(2); |
| 200 | entered = True; |
| 201 | fprintf(stderr, "\n%s: %s:%d (%s): Assertion `%s' failed.\n", |
| 202 | "valgrind", file, line, fn, expr ); |
| 203 | fprintf(stderr, "Please report this bug to me at: %s\n\n", |
| 204 | VG_EMAIL_ADDR); |
| 205 | my_exit(1); |
| 206 | } |
| 207 | |
| 208 | #define MY__STRING(__str) #__str |
| 209 | |
| 210 | #define my_assert(expr) \ |
| 211 | ((void) ((expr) ? 0 : \ |
| 212 | (my_assert_fail (MY__STRING(expr), \ |
| 213 | __FILE__, __LINE__, \ |
| 214 | __PRETTY_FUNCTION__), 0))) |
| 215 | |
| 216 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 217 | /* --------------------------------------------------------------------- |
| 218 | Pass pthread_ calls to Valgrind's request mechanism. |
| 219 | ------------------------------------------------------------------ */ |
| 220 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 221 | #include <errno.h> |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 222 | #include <sys/time.h> /* gettimeofday */ |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 223 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 224 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 225 | /* --------------------------------------------------- |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 226 | Ummm .. |
| 227 | ------------------------------------------------ */ |
| 228 | |
| 229 | static |
| 230 | void pthread_error ( const char* msg ) |
| 231 | { |
| 232 | int res; |
| 233 | VALGRIND_MAGIC_SEQUENCE(res, 0, |
| 234 | VG_USERREQ__PTHREAD_ERROR, |
| 235 | msg, 0, 0, 0); |
| 236 | } |
| 237 | |
| 238 | |
| 239 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 240 | THREAD ATTRIBUTES |
| 241 | ------------------------------------------------ */ |
| 242 | |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 243 | int pthread_attr_init(pthread_attr_t *attr) |
| 244 | { |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 245 | /* Just initialise the fields which we might look at. */ |
| 246 | attr->__detachstate = PTHREAD_CREATE_JOINABLE; |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 247 | return 0; |
| 248 | } |
| 249 | |
| 250 | int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate) |
| 251 | { |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 252 | if (detachstate != PTHREAD_CREATE_JOINABLE |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 253 | && detachstate != PTHREAD_CREATE_DETACHED) { |
| 254 | pthread_error("pthread_attr_setdetachstate: " |
| 255 | "detachstate is invalid"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 256 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 257 | } |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 258 | attr->__detachstate = detachstate; |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 259 | return 0; |
| 260 | } |
| 261 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 262 | int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate) |
| 263 | { |
| 264 | *detachstate = attr->__detachstate; |
| 265 | return 0; |
| 266 | } |
| 267 | |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 268 | int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit) |
| 269 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 270 | static int moans = N_MOANS; |
| 271 | if (moans-- > 0) |
| 272 | ignored("pthread_attr_setinheritsched"); |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 273 | return 0; |
| 274 | } |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 275 | |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 276 | __attribute__((weak)) |
| 277 | int pthread_attr_setstacksize (pthread_attr_t *__attr, |
| 278 | size_t __stacksize) |
| 279 | { |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 280 | size_t limit; |
sewardj | 3d7c8d6 | 2002-06-04 20:59:16 +0000 | [diff] [blame] | 281 | char buf[1024]; |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 282 | ensure_valgrind("pthread_attr_setstacksize"); |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 283 | limit = VG_PTHREAD_STACK_SIZE - VG_AR_CLIENT_STACKBASE_REDZONE_SZB |
| 284 | - 1000; /* paranoia */ |
| 285 | if (__stacksize < limit) |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 286 | return 0; |
sewardj | 3d7c8d6 | 2002-06-04 20:59:16 +0000 | [diff] [blame] | 287 | snprintf(buf, sizeof(buf), "pthread_attr_setstacksize: " |
| 288 | "requested size %d >= VG_PTHREAD_STACK_SIZE\n " |
| 289 | "edit vg_include.h and rebuild.", __stacksize); |
| 290 | buf[sizeof(buf)-1] = '\0'; /* Make sure it is zero terminated */ |
| 291 | barf(buf); |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 292 | } |
| 293 | |
| 294 | |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 295 | /* This is completely bogus. */ |
| 296 | int pthread_attr_getschedparam(const pthread_attr_t *attr, |
| 297 | struct sched_param *param) |
| 298 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 299 | static int moans = N_MOANS; |
| 300 | if (moans-- > 0) |
| 301 | kludged("pthread_attr_getschedparam"); |
sewardj | 3e909ce | 2002-06-03 13:27:15 +0000 | [diff] [blame] | 302 | # ifdef HAVE_SCHED_PRIORITY |
sewardj | 72d5848 | 2002-04-24 02:20:20 +0000 | [diff] [blame] | 303 | if (param) param->sched_priority = 0; /* who knows */ |
| 304 | # else |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 305 | if (param) param->__sched_priority = 0; /* who knows */ |
sewardj | 72d5848 | 2002-04-24 02:20:20 +0000 | [diff] [blame] | 306 | # endif |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 307 | return 0; |
| 308 | } |
| 309 | |
| 310 | int pthread_attr_setschedparam(pthread_attr_t *attr, |
| 311 | const struct sched_param *param) |
| 312 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 313 | static int moans = N_MOANS; |
| 314 | if (moans-- > 0) |
| 315 | ignored("pthread_attr_setschedparam"); |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | int pthread_attr_destroy(pthread_attr_t *attr) |
| 320 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 321 | static int moans = N_MOANS; |
| 322 | if (moans-- > 0) |
| 323 | ignored("pthread_attr_destroy"); |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 324 | return 0; |
| 325 | } |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 326 | |
sewardj | 0d84423 | 2002-06-02 09:29:31 +0000 | [diff] [blame] | 327 | /* These are no-ops, as with LinuxThreads. */ |
| 328 | int pthread_attr_setscope ( pthread_attr_t *attr, int scope ) |
| 329 | { |
| 330 | ensure_valgrind("pthread_attr_setscope"); |
| 331 | if (scope == PTHREAD_SCOPE_SYSTEM) |
| 332 | return 0; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 333 | pthread_error("pthread_attr_setscope: " |
| 334 | "invalid or unsupported scope"); |
sewardj | 0d84423 | 2002-06-02 09:29:31 +0000 | [diff] [blame] | 335 | if (scope == PTHREAD_SCOPE_PROCESS) |
| 336 | return ENOTSUP; |
| 337 | return EINVAL; |
| 338 | } |
| 339 | |
| 340 | int pthread_attr_getscope ( const pthread_attr_t *attr, int *scope ) |
| 341 | { |
| 342 | ensure_valgrind("pthread_attr_setscope"); |
| 343 | if (scope) |
| 344 | *scope = PTHREAD_SCOPE_SYSTEM; |
| 345 | return 0; |
| 346 | } |
| 347 | |
sewardj | 64039bb | 2002-06-03 00:58:18 +0000 | [diff] [blame] | 348 | |
| 349 | /* Pretty bogus. Avoid if possible. */ |
| 350 | int pthread_getattr_np (pthread_t thread, pthread_attr_t *attr) |
| 351 | { |
| 352 | int detached; |
| 353 | size_t limit; |
| 354 | ensure_valgrind("pthread_getattr_np"); |
| 355 | kludged("pthread_getattr_np"); |
| 356 | limit = VG_PTHREAD_STACK_SIZE - VG_AR_CLIENT_STACKBASE_REDZONE_SZB |
| 357 | - 1000; /* paranoia */ |
| 358 | attr->__detachstate = PTHREAD_CREATE_JOINABLE; |
| 359 | attr->__schedpolicy = SCHED_OTHER; |
| 360 | attr->__schedparam.sched_priority = 0; |
| 361 | attr->__inheritsched = PTHREAD_EXPLICIT_SCHED; |
| 362 | attr->__scope = PTHREAD_SCOPE_SYSTEM; |
| 363 | attr->__guardsize = VKI_BYTES_PER_PAGE; |
| 364 | attr->__stackaddr = NULL; |
| 365 | attr->__stackaddr_set = 0; |
| 366 | attr->__stacksize = limit; |
| 367 | VALGRIND_MAGIC_SEQUENCE(detached, (-1) /* default */, |
| 368 | VG_USERREQ__SET_OR_GET_DETACH, |
| 369 | 2 /* get */, thread, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 370 | my_assert(detached == 0 || detached == 1); |
sewardj | 64039bb | 2002-06-03 00:58:18 +0000 | [diff] [blame] | 371 | if (detached) |
| 372 | attr->__detachstate = PTHREAD_CREATE_DETACHED; |
| 373 | return 0; |
| 374 | } |
| 375 | |
| 376 | |
| 377 | /* Bogus ... */ |
| 378 | int pthread_attr_getstackaddr ( const pthread_attr_t * attr, |
| 379 | void ** stackaddr ) |
| 380 | { |
| 381 | ensure_valgrind("pthread_attr_getstackaddr"); |
| 382 | kludged("pthread_attr_getstackaddr"); |
| 383 | if (stackaddr) |
| 384 | *stackaddr = NULL; |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | /* Not bogus (!) */ |
| 389 | int pthread_attr_getstacksize ( const pthread_attr_t * _attr, |
| 390 | size_t * __stacksize ) |
| 391 | { |
| 392 | size_t limit; |
| 393 | ensure_valgrind("pthread_attr_getstacksize"); |
| 394 | limit = VG_PTHREAD_STACK_SIZE - VG_AR_CLIENT_STACKBASE_REDZONE_SZB |
| 395 | - 1000; /* paranoia */ |
| 396 | if (__stacksize) |
| 397 | *__stacksize = limit; |
| 398 | return 0; |
| 399 | } |
| 400 | |
sewardj | a3be12f | 2002-06-17 12:19:44 +0000 | [diff] [blame] | 401 | int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy) |
| 402 | { |
| 403 | if (policy != SCHED_OTHER && policy != SCHED_FIFO && policy != SCHED_RR) |
| 404 | return EINVAL; |
| 405 | attr->__schedpolicy = policy; |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy) |
| 410 | { |
| 411 | *policy = attr->__schedpolicy; |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 416 | /* --------------------------------------------------- |
| 417 | Helper functions for running a thread |
| 418 | and for clearing up afterwards. |
| 419 | ------------------------------------------------ */ |
| 420 | |
| 421 | /* All exiting threads eventually pass through here, bearing the |
| 422 | return value, or PTHREAD_CANCELED, in ret_val. */ |
| 423 | static |
| 424 | __attribute__((noreturn)) |
| 425 | void thread_exit_wrapper ( void* ret_val ) |
| 426 | { |
sewardj | 870497a | 2002-05-29 01:06:47 +0000 | [diff] [blame] | 427 | int detached, res; |
| 428 | CleanupEntry cu; |
| 429 | pthread_key_t key; |
| 430 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 431 | /* Run this thread's cleanup handlers. */ |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 432 | while (1) { |
| 433 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 434 | VG_USERREQ__CLEANUP_POP, |
| 435 | &cu, 0, 0, 0); |
| 436 | if (res == -1) break; /* stack empty */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 437 | my_assert(res == 0); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 438 | if (0) printf("running exit cleanup handler"); |
| 439 | cu.fn ( cu.arg ); |
| 440 | } |
| 441 | |
sewardj | 870497a | 2002-05-29 01:06:47 +0000 | [diff] [blame] | 442 | /* Run this thread's key finalizers. Really this should be run |
| 443 | PTHREAD_DESTRUCTOR_ITERATIONS times. */ |
| 444 | for (key = 0; key < VG_N_THREAD_KEYS; key++) { |
| 445 | VALGRIND_MAGIC_SEQUENCE(res, (-2) /* default */, |
| 446 | VG_USERREQ__GET_KEY_D_AND_S, |
| 447 | key, &cu, 0, 0 ); |
| 448 | if (res == 0) { |
| 449 | /* valid key */ |
| 450 | if (cu.fn && cu.arg) |
| 451 | cu.fn /* destructor for key */ |
| 452 | ( cu.arg /* specific for key for this thread */ ); |
| 453 | continue; |
| 454 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 455 | my_assert(res == -1); |
sewardj | 870497a | 2002-05-29 01:06:47 +0000 | [diff] [blame] | 456 | } |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 457 | |
| 458 | /* Decide on my final disposition. */ |
| 459 | VALGRIND_MAGIC_SEQUENCE(detached, (-1) /* default */, |
| 460 | VG_USERREQ__SET_OR_GET_DETACH, |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 461 | 2 /* get */, pthread_self(), 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 462 | my_assert(detached == 0 || detached == 1); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 463 | |
| 464 | if (detached) { |
| 465 | /* Detached; I just quit right now. */ |
| 466 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 467 | VG_USERREQ__QUIT, 0, 0, 0, 0); |
| 468 | } else { |
| 469 | /* Not detached; so I wait for a joiner. */ |
| 470 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 471 | VG_USERREQ__WAIT_JOINER, ret_val, 0, 0, 0); |
| 472 | } |
| 473 | /* NOTREACHED */ |
| 474 | barf("thread_exit_wrapper: still alive?!"); |
| 475 | } |
| 476 | |
| 477 | |
| 478 | /* This function is a wrapper function for running a thread. It runs |
| 479 | the root function specified in pthread_create, and then, should the |
| 480 | root function return a value, it arranges to run the thread's |
| 481 | cleanup handlers and exit correctly. */ |
| 482 | |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 483 | /* Struct used to convey info from pthread_create to thread_wrapper. |
| 484 | Must be careful not to pass to the child thread any pointers to |
| 485 | objects which might be on the parent's stack. */ |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 486 | typedef |
| 487 | struct { |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 488 | int attr__detachstate; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 489 | void* (*root_fn) ( void* ); |
| 490 | void* arg; |
| 491 | } |
| 492 | NewThreadInfo; |
| 493 | |
| 494 | |
| 495 | /* This is passed to the VG_USERREQ__APPLY_IN_NEW_THREAD and so must |
| 496 | not return. Note that this runs in the new thread, not the |
| 497 | parent. */ |
| 498 | static |
| 499 | __attribute__((noreturn)) |
| 500 | void thread_wrapper ( NewThreadInfo* info ) |
| 501 | { |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 502 | int res; |
| 503 | int attr__detachstate; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 504 | void* (*root_fn) ( void* ); |
| 505 | void* arg; |
| 506 | void* ret_val; |
| 507 | |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 508 | attr__detachstate = info->attr__detachstate; |
| 509 | root_fn = info->root_fn; |
| 510 | arg = info->arg; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 511 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 512 | /* Free up the arg block that pthread_create malloced. */ |
| 513 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 514 | VG_USERREQ__FREE, info, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 515 | my_assert(res == 0); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 516 | |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 517 | /* Minimally observe the attributes supplied. */ |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 518 | if (attr__detachstate != PTHREAD_CREATE_DETACHED |
| 519 | && attr__detachstate != PTHREAD_CREATE_JOINABLE) |
| 520 | pthread_error("thread_wrapper: invalid attr->__detachstate"); |
| 521 | if (attr__detachstate == PTHREAD_CREATE_DETACHED) |
| 522 | pthread_detach(pthread_self()); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 523 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 524 | /* The root function might not return. But if it does we simply |
| 525 | move along to thread_exit_wrapper. All other ways out for the |
| 526 | thread (cancellation, or calling pthread_exit) lead there |
| 527 | too. */ |
| 528 | ret_val = root_fn(arg); |
| 529 | thread_exit_wrapper(ret_val); |
| 530 | /* NOTREACHED */ |
| 531 | } |
| 532 | |
| 533 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 534 | /* --------------------------------------------------- |
| 535 | THREADs |
| 536 | ------------------------------------------------ */ |
| 537 | |
sewardj | ff42d1d | 2002-05-22 13:17:31 +0000 | [diff] [blame] | 538 | __attribute__((weak)) |
| 539 | int pthread_yield ( void ) |
| 540 | { |
| 541 | int res; |
| 542 | ensure_valgrind("pthread_yield"); |
| 543 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 544 | VG_USERREQ__PTHREAD_YIELD, 0, 0, 0, 0); |
| 545 | return 0; |
| 546 | } |
| 547 | |
| 548 | |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 549 | int pthread_equal(pthread_t thread1, pthread_t thread2) |
| 550 | { |
| 551 | return thread1 == thread2 ? 1 : 0; |
| 552 | } |
| 553 | |
| 554 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 555 | /* Bundle up the args into a malloc'd block and create a new thread |
| 556 | consisting of thread_wrapper() applied to said malloc'd block. */ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 557 | int |
sewardj | 1462c8b | 2002-07-24 09:41:52 +0000 | [diff] [blame] | 558 | pthread_create (pthread_t *__restrict __thredd, |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 559 | __const pthread_attr_t *__restrict __attr, |
| 560 | void *(*__start_routine) (void *), |
| 561 | void *__restrict __arg) |
| 562 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 563 | int tid_child; |
| 564 | NewThreadInfo* info; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 565 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 566 | ensure_valgrind("pthread_create"); |
| 567 | |
| 568 | /* Allocate space for the arg block. thread_wrapper will free |
| 569 | it. */ |
| 570 | VALGRIND_MAGIC_SEQUENCE(info, NULL /* default */, |
| 571 | VG_USERREQ__MALLOC, |
| 572 | sizeof(NewThreadInfo), 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 573 | my_assert(info != NULL); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 574 | |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 575 | if (__attr) |
| 576 | info->attr__detachstate = __attr->__detachstate; |
| 577 | else |
| 578 | info->attr__detachstate = PTHREAD_CREATE_JOINABLE; |
| 579 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 580 | info->root_fn = __start_routine; |
| 581 | info->arg = __arg; |
| 582 | VALGRIND_MAGIC_SEQUENCE(tid_child, VG_INVALID_THREADID /* default */, |
| 583 | VG_USERREQ__APPLY_IN_NEW_THREAD, |
| 584 | &thread_wrapper, info, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 585 | my_assert(tid_child != VG_INVALID_THREADID); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 586 | |
sewardj | 1462c8b | 2002-07-24 09:41:52 +0000 | [diff] [blame] | 587 | if (__thredd) |
| 588 | *__thredd = tid_child; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 589 | return 0; /* success */ |
| 590 | } |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 591 | |
| 592 | |
| 593 | int |
| 594 | pthread_join (pthread_t __th, void **__thread_return) |
| 595 | { |
| 596 | int res; |
| 597 | ensure_valgrind("pthread_join"); |
| 598 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 599 | VG_USERREQ__PTHREAD_JOIN, |
| 600 | __th, __thread_return, 0, 0); |
| 601 | return res; |
| 602 | } |
| 603 | |
| 604 | |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 605 | void pthread_exit(void *retval) |
| 606 | { |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 607 | ensure_valgrind("pthread_exit"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 608 | /* Simple! */ |
| 609 | thread_exit_wrapper(retval); |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 610 | } |
| 611 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 612 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 613 | pthread_t pthread_self(void) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 614 | { |
| 615 | int tid; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 616 | ensure_valgrind("pthread_self"); |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 617 | VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 618 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 619 | 0, 0, 0, 0); |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 620 | if (tid < 1 || tid >= VG_N_THREADS) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 621 | barf("pthread_self: invalid ThreadId"); |
| 622 | return tid; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 623 | } |
| 624 | |
| 625 | |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 626 | int pthread_detach(pthread_t th) |
| 627 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 628 | int res; |
| 629 | ensure_valgrind("pthread_detach"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 630 | /* First we enquire as to the current detach state. */ |
| 631 | VALGRIND_MAGIC_SEQUENCE(res, (-2) /* default */, |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 632 | VG_USERREQ__SET_OR_GET_DETACH, |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 633 | 2 /* get */, th, 0, 0); |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 634 | if (res == -1) { |
| 635 | /* not found */ |
| 636 | pthread_error("pthread_detach: " |
| 637 | "invalid target thread"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 638 | return ESRCH; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 639 | } |
| 640 | if (res == 1) { |
| 641 | /* already detached */ |
| 642 | pthread_error("pthread_detach: " |
| 643 | "target thread is already detached"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 644 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 645 | } |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 646 | if (res == 0) { |
| 647 | VALGRIND_MAGIC_SEQUENCE(res, (-2) /* default */, |
| 648 | VG_USERREQ__SET_OR_GET_DETACH, |
| 649 | 1 /* set */, th, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 650 | my_assert(res == 0); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 651 | return 0; |
| 652 | } |
| 653 | barf("pthread_detach"); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 654 | } |
| 655 | |
| 656 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 657 | /* --------------------------------------------------- |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 658 | CLEANUP STACKS |
| 659 | ------------------------------------------------ */ |
| 660 | |
| 661 | void _pthread_cleanup_push (struct _pthread_cleanup_buffer *__buffer, |
| 662 | void (*__routine) (void *), |
| 663 | void *__arg) |
| 664 | { |
| 665 | int res; |
| 666 | CleanupEntry cu; |
| 667 | ensure_valgrind("_pthread_cleanup_push"); |
| 668 | cu.fn = __routine; |
| 669 | cu.arg = __arg; |
| 670 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 671 | VG_USERREQ__CLEANUP_PUSH, |
| 672 | &cu, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 673 | my_assert(res == 0); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 674 | } |
| 675 | |
| 676 | |
| 677 | void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *__buffer, |
| 678 | void (*__routine) (void *), |
| 679 | void *__arg) |
| 680 | { |
| 681 | /* As _pthread_cleanup_push, but first save the thread's original |
| 682 | cancellation type in __buffer and set it to Deferred. */ |
| 683 | int orig_ctype; |
| 684 | ensure_valgrind("_pthread_cleanup_push_defer"); |
| 685 | /* Set to Deferred, and put the old cancellation type in res. */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 686 | my_assert(-1 != PTHREAD_CANCEL_DEFERRED); |
| 687 | my_assert(-1 != PTHREAD_CANCEL_ASYNCHRONOUS); |
| 688 | my_assert(sizeof(struct _pthread_cleanup_buffer) >= sizeof(int)); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 689 | VALGRIND_MAGIC_SEQUENCE(orig_ctype, (-1) /* default */, |
| 690 | VG_USERREQ__SET_CANCELTYPE, |
| 691 | PTHREAD_CANCEL_DEFERRED, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 692 | my_assert(orig_ctype != -1); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 693 | *((int*)(__buffer)) = orig_ctype; |
| 694 | /* Now push the cleanup. */ |
| 695 | _pthread_cleanup_push(NULL, __routine, __arg); |
| 696 | } |
| 697 | |
| 698 | |
| 699 | void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *__buffer, |
| 700 | int __execute) |
| 701 | { |
| 702 | int res; |
| 703 | CleanupEntry cu; |
| 704 | ensure_valgrind("_pthread_cleanup_push"); |
| 705 | cu.fn = cu.arg = NULL; /* paranoia */ |
| 706 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 707 | VG_USERREQ__CLEANUP_POP, |
| 708 | &cu, 0, 0, 0); |
| 709 | if (res == 0) { |
| 710 | /* pop succeeded */ |
| 711 | if (__execute) { |
| 712 | cu.fn ( cu.arg ); |
| 713 | } |
| 714 | return; |
| 715 | } |
| 716 | if (res == -1) { |
| 717 | /* stack underflow */ |
| 718 | return; |
| 719 | } |
| 720 | barf("_pthread_cleanup_pop"); |
| 721 | } |
| 722 | |
| 723 | |
| 724 | void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *__buffer, |
| 725 | int __execute) |
| 726 | { |
| 727 | int orig_ctype, fake_ctype; |
| 728 | /* As _pthread_cleanup_pop, but after popping/running the handler, |
| 729 | restore the thread's original cancellation type from the first |
| 730 | word of __buffer. */ |
| 731 | _pthread_cleanup_pop(NULL, __execute); |
| 732 | orig_ctype = *((int*)(__buffer)); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 733 | my_assert(orig_ctype == PTHREAD_CANCEL_DEFERRED |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 734 | || orig_ctype == PTHREAD_CANCEL_ASYNCHRONOUS); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 735 | my_assert(-1 != PTHREAD_CANCEL_DEFERRED); |
| 736 | my_assert(-1 != PTHREAD_CANCEL_ASYNCHRONOUS); |
| 737 | my_assert(sizeof(struct _pthread_cleanup_buffer) >= sizeof(int)); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 738 | VALGRIND_MAGIC_SEQUENCE(fake_ctype, (-1) /* default */, |
| 739 | VG_USERREQ__SET_CANCELTYPE, |
| 740 | orig_ctype, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 741 | my_assert(fake_ctype == PTHREAD_CANCEL_DEFERRED); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 742 | } |
| 743 | |
| 744 | |
| 745 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 746 | MUTEX ATTRIBUTES |
| 747 | ------------------------------------------------ */ |
| 748 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 749 | int __pthread_mutexattr_init(pthread_mutexattr_t *attr) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 750 | { |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 751 | attr->__mutexkind = PTHREAD_MUTEX_ERRORCHECK_NP; |
sewardj | 8937c81 | 2002-04-12 20:12:20 +0000 | [diff] [blame] | 752 | return 0; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 753 | } |
| 754 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 755 | int __pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type) |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 756 | { |
| 757 | switch (type) { |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 758 | # ifndef GLIBC_2_1 |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 759 | case PTHREAD_MUTEX_TIMED_NP: |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 760 | case PTHREAD_MUTEX_ADAPTIVE_NP: |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 761 | # endif |
sewardj | a1679dd | 2002-05-10 22:31:40 +0000 | [diff] [blame] | 762 | # ifdef GLIBC_2_1 |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 763 | case PTHREAD_MUTEX_FAST_NP: |
sewardj | a1679dd | 2002-05-10 22:31:40 +0000 | [diff] [blame] | 764 | # endif |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 765 | case PTHREAD_MUTEX_RECURSIVE_NP: |
| 766 | case PTHREAD_MUTEX_ERRORCHECK_NP: |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 767 | attr->__mutexkind = type; |
| 768 | return 0; |
| 769 | default: |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 770 | pthread_error("pthread_mutexattr_settype: " |
| 771 | "invalid type"); |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 772 | return EINVAL; |
| 773 | } |
| 774 | } |
| 775 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 776 | int __pthread_mutexattr_destroy(pthread_mutexattr_t *attr) |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 777 | { |
| 778 | return 0; |
| 779 | } |
| 780 | |
| 781 | |
| 782 | /* --------------------------------------------------- |
| 783 | MUTEXes |
| 784 | ------------------------------------------------ */ |
| 785 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 786 | int __pthread_mutex_init(pthread_mutex_t *mutex, |
| 787 | const pthread_mutexattr_t *mutexattr) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 788 | { |
sewardj | 604ec3c | 2002-04-18 22:38:41 +0000 | [diff] [blame] | 789 | mutex->__m_count = 0; |
| 790 | mutex->__m_owner = (_pthread_descr)VG_INVALID_THREADID; |
| 791 | mutex->__m_kind = PTHREAD_MUTEX_ERRORCHECK_NP; |
| 792 | if (mutexattr) |
| 793 | mutex->__m_kind = mutexattr->__mutexkind; |
| 794 | return 0; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 795 | } |
| 796 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 797 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 798 | int __pthread_mutex_lock(pthread_mutex_t *mutex) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 799 | { |
| 800 | int res; |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 801 | static int moans = N_MOANS; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 802 | if (RUNNING_ON_VALGRIND) { |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 803 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 804 | VG_USERREQ__PTHREAD_MUTEX_LOCK, |
| 805 | mutex, 0, 0, 0); |
| 806 | return res; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 807 | } else { |
| 808 | if (moans-- > 0) |
| 809 | not_inside("pthread_mutex_lock"); |
| 810 | return 0; /* success */ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 811 | } |
| 812 | } |
| 813 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 814 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 815 | int __pthread_mutex_trylock(pthread_mutex_t *mutex) |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 816 | { |
| 817 | int res; |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 818 | static int moans = N_MOANS; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 819 | if (RUNNING_ON_VALGRIND) { |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 820 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 821 | VG_USERREQ__PTHREAD_MUTEX_TRYLOCK, |
| 822 | mutex, 0, 0, 0); |
| 823 | return res; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 824 | } else { |
| 825 | if (moans-- > 0) |
| 826 | not_inside("pthread_mutex_trylock"); |
| 827 | return 0; |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 828 | } |
| 829 | } |
| 830 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 831 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 832 | int __pthread_mutex_unlock(pthread_mutex_t *mutex) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 833 | { |
| 834 | int res; |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 835 | static int moans = N_MOANS; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 836 | if (RUNNING_ON_VALGRIND) { |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 837 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 838 | VG_USERREQ__PTHREAD_MUTEX_UNLOCK, |
| 839 | mutex, 0, 0, 0); |
| 840 | return res; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 841 | } else { |
| 842 | if (moans-- > 0) |
| 843 | not_inside("pthread_mutex_unlock"); |
| 844 | return 0; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 845 | } |
| 846 | } |
| 847 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 848 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 849 | int __pthread_mutex_destroy(pthread_mutex_t *mutex) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 850 | { |
sewardj | 604ec3c | 2002-04-18 22:38:41 +0000 | [diff] [blame] | 851 | /* Valgrind doesn't hold any resources on behalf of the mutex, so no |
| 852 | need to involve it. */ |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 853 | if (mutex->__m_count > 0) { |
| 854 | pthread_error("pthread_mutex_destroy: " |
| 855 | "mutex is still in use"); |
sewardj | 604ec3c | 2002-04-18 22:38:41 +0000 | [diff] [blame] | 856 | return EBUSY; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 857 | } |
| 858 | mutex->__m_count = 0; |
| 859 | mutex->__m_owner = (_pthread_descr)VG_INVALID_THREADID; |
| 860 | mutex->__m_kind = PTHREAD_MUTEX_ERRORCHECK_NP; |
| 861 | return 0; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 862 | } |
| 863 | |
| 864 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 865 | /* --------------------------------------------------- |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 866 | CONDITION VARIABLES |
| 867 | ------------------------------------------------ */ |
| 868 | |
| 869 | /* LinuxThreads supports no attributes for conditions. Hence ... */ |
| 870 | |
| 871 | int pthread_condattr_init(pthread_condattr_t *attr) |
| 872 | { |
| 873 | return 0; |
| 874 | } |
| 875 | |
sewardj | 0738a59 | 2002-04-20 13:59:33 +0000 | [diff] [blame] | 876 | int pthread_condattr_destroy(pthread_condattr_t *attr) |
| 877 | { |
| 878 | return 0; |
| 879 | } |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 880 | |
| 881 | int pthread_cond_init( pthread_cond_t *cond, |
| 882 | const pthread_condattr_t *cond_attr) |
| 883 | { |
| 884 | cond->__c_waiting = (_pthread_descr)VG_INVALID_THREADID; |
| 885 | return 0; |
| 886 | } |
| 887 | |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 888 | int pthread_cond_destroy(pthread_cond_t *cond) |
| 889 | { |
| 890 | /* should check that no threads are waiting on this CV */ |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 891 | static int moans = N_MOANS; |
| 892 | if (moans-- > 0) |
| 893 | kludged("pthread_cond_destroy"); |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 894 | return 0; |
| 895 | } |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 896 | |
| 897 | /* --------------------------------------------------- |
| 898 | SCHEDULING |
| 899 | ------------------------------------------------ */ |
| 900 | |
| 901 | /* This is completely bogus. */ |
| 902 | int pthread_getschedparam(pthread_t target_thread, |
| 903 | int *policy, |
| 904 | struct sched_param *param) |
| 905 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 906 | static int moans = N_MOANS; |
| 907 | if (moans-- > 0) |
| 908 | kludged("pthread_getschedparam"); |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 909 | if (policy) *policy = SCHED_OTHER; |
sewardj | 3e909ce | 2002-06-03 13:27:15 +0000 | [diff] [blame] | 910 | # ifdef HAVE_SCHED_PRIORITY |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 911 | if (param) param->sched_priority = 0; /* who knows */ |
| 912 | # else |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 913 | if (param) param->__sched_priority = 0; /* who knows */ |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 914 | # endif |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 915 | return 0; |
| 916 | } |
| 917 | |
| 918 | int pthread_setschedparam(pthread_t target_thread, |
| 919 | int policy, |
| 920 | const struct sched_param *param) |
| 921 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 922 | static int moans = N_MOANS; |
| 923 | if (moans-- > 0) |
| 924 | ignored("pthread_setschedparam"); |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 925 | return 0; |
| 926 | } |
| 927 | |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 928 | int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex) |
| 929 | { |
| 930 | int res; |
| 931 | ensure_valgrind("pthread_cond_wait"); |
| 932 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 933 | VG_USERREQ__PTHREAD_COND_WAIT, |
| 934 | cond, mutex, 0, 0); |
| 935 | return res; |
| 936 | } |
| 937 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 938 | int pthread_cond_timedwait ( pthread_cond_t *cond, |
| 939 | pthread_mutex_t *mutex, |
| 940 | const struct timespec *abstime ) |
| 941 | { |
| 942 | int res; |
| 943 | unsigned int ms_now, ms_end; |
| 944 | struct timeval timeval_now; |
| 945 | unsigned long long int ull_ms_now_after_1970; |
| 946 | unsigned long long int ull_ms_end_after_1970; |
| 947 | |
| 948 | ensure_valgrind("pthread_cond_timedwait"); |
| 949 | VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| 950 | VG_USERREQ__READ_MILLISECOND_TIMER, |
| 951 | 0, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 952 | my_assert(ms_now != 0xFFFFFFFF); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 953 | res = gettimeofday(&timeval_now, NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 954 | my_assert(res == 0); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 955 | |
| 956 | ull_ms_now_after_1970 |
| 957 | = 1000ULL * ((unsigned long long int)(timeval_now.tv_sec)) |
| 958 | + ((unsigned long long int)(timeval_now.tv_usec / 1000000)); |
| 959 | ull_ms_end_after_1970 |
| 960 | = 1000ULL * ((unsigned long long int)(abstime->tv_sec)) |
| 961 | + ((unsigned long long int)(abstime->tv_nsec / 1000000)); |
sewardj | d8e919e | 2002-05-29 20:13:53 +0000 | [diff] [blame] | 962 | if (ull_ms_end_after_1970 < ull_ms_now_after_1970) |
| 963 | ull_ms_end_after_1970 = ull_ms_now_after_1970; |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 964 | ms_end |
| 965 | = ms_now + (unsigned int)(ull_ms_end_after_1970 - ull_ms_now_after_1970); |
| 966 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 967 | VG_USERREQ__PTHREAD_COND_TIMEDWAIT, |
| 968 | cond, mutex, ms_end, 0); |
| 969 | return res; |
| 970 | } |
| 971 | |
| 972 | |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 973 | int pthread_cond_signal(pthread_cond_t *cond) |
| 974 | { |
| 975 | int res; |
| 976 | ensure_valgrind("pthread_cond_signal"); |
| 977 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 978 | VG_USERREQ__PTHREAD_COND_SIGNAL, |
| 979 | cond, 0, 0, 0); |
| 980 | return res; |
| 981 | } |
| 982 | |
| 983 | int pthread_cond_broadcast(pthread_cond_t *cond) |
| 984 | { |
| 985 | int res; |
| 986 | ensure_valgrind("pthread_cond_broadcast"); |
| 987 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 988 | VG_USERREQ__PTHREAD_COND_BROADCAST, |
| 989 | cond, 0, 0, 0); |
| 990 | return res; |
| 991 | } |
| 992 | |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 993 | |
| 994 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 995 | CANCELLATION |
| 996 | ------------------------------------------------ */ |
| 997 | |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 998 | int pthread_setcancelstate(int state, int *oldstate) |
| 999 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1000 | int res; |
| 1001 | ensure_valgrind("pthread_setcancelstate"); |
| 1002 | if (state != PTHREAD_CANCEL_ENABLE |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1003 | && state != PTHREAD_CANCEL_DISABLE) { |
| 1004 | pthread_error("pthread_setcancelstate: " |
| 1005 | "invalid state"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1006 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1007 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1008 | my_assert(-1 != PTHREAD_CANCEL_ENABLE); |
| 1009 | my_assert(-1 != PTHREAD_CANCEL_DISABLE); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1010 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1011 | VG_USERREQ__SET_CANCELSTATE, |
| 1012 | state, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1013 | my_assert(res != -1); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1014 | if (oldstate) |
| 1015 | *oldstate = res; |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1016 | return 0; |
| 1017 | } |
| 1018 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1019 | int pthread_setcanceltype(int type, int *oldtype) |
| 1020 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1021 | int res; |
| 1022 | ensure_valgrind("pthread_setcanceltype"); |
| 1023 | if (type != PTHREAD_CANCEL_DEFERRED |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1024 | && type != PTHREAD_CANCEL_ASYNCHRONOUS) { |
| 1025 | pthread_error("pthread_setcanceltype: " |
| 1026 | "invalid type"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1027 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1028 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1029 | my_assert(-1 != PTHREAD_CANCEL_DEFERRED); |
| 1030 | my_assert(-1 != PTHREAD_CANCEL_ASYNCHRONOUS); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1031 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1032 | VG_USERREQ__SET_CANCELTYPE, |
| 1033 | type, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1034 | my_assert(res != -1); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1035 | if (oldtype) |
| 1036 | *oldtype = res; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1037 | return 0; |
| 1038 | } |
| 1039 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1040 | int pthread_cancel(pthread_t thread) |
| 1041 | { |
| 1042 | int res; |
| 1043 | ensure_valgrind("pthread_cancel"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1044 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1045 | VG_USERREQ__SET_CANCELPEND, |
| 1046 | thread, &thread_exit_wrapper, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1047 | my_assert(res != -1); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1048 | return res; |
| 1049 | } |
| 1050 | |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1051 | static __inline__ |
| 1052 | void __my_pthread_testcancel(void) |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1053 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1054 | int res; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1055 | ensure_valgrind("__my_pthread_testcancel"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1056 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1057 | VG_USERREQ__TESTCANCEL, |
| 1058 | 0, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1059 | my_assert(res == 0); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1060 | } |
| 1061 | |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1062 | void pthread_testcancel ( void ) |
| 1063 | { |
| 1064 | __my_pthread_testcancel(); |
| 1065 | } |
| 1066 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1067 | |
sewardj | ef037c7 | 2002-05-30 00:40:03 +0000 | [diff] [blame] | 1068 | /* Not really sure what this is for. I suspect for doing the POSIX |
| 1069 | requirements for fork() and exec(). We do this internally anyway |
| 1070 | whenever those syscalls are observed, so this could be superfluous, |
| 1071 | but hey ... |
| 1072 | */ |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1073 | void __pthread_kill_other_threads_np ( void ) |
| 1074 | { |
sewardj | ef037c7 | 2002-05-30 00:40:03 +0000 | [diff] [blame] | 1075 | int res; |
| 1076 | ensure_valgrind("__pthread_kill_other_threads_np"); |
| 1077 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1078 | VG_USERREQ__NUKE_OTHER_THREADS, |
| 1079 | 0, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1080 | my_assert(res == 0); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1081 | } |
| 1082 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1083 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1084 | /* --------------------------------------------------- |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1085 | SIGNALS |
| 1086 | ------------------------------------------------ */ |
| 1087 | |
| 1088 | #include <signal.h> |
| 1089 | |
| 1090 | int pthread_sigmask(int how, const sigset_t *newmask, |
| 1091 | sigset_t *oldmask) |
| 1092 | { |
| 1093 | int res; |
| 1094 | |
| 1095 | /* A bit subtle, because the scheduler expects newmask and oldmask |
| 1096 | to be vki_sigset_t* rather than sigset_t*, and the two are |
| 1097 | different. Fortunately the first 64 bits of a sigset_t are |
| 1098 | exactly a vki_sigset_t, so we just pass the pointers through |
| 1099 | unmodified. Haaaack! |
| 1100 | |
| 1101 | Also mash the how value so that the SIG_ constants from glibc |
sewardj | 018f762 | 2002-05-15 21:13:39 +0000 | [diff] [blame] | 1102 | constants to VKI_ constants, so that the former do not have to |
| 1103 | be included into vg_scheduler.c. */ |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1104 | |
| 1105 | ensure_valgrind("pthread_sigmask"); |
| 1106 | |
| 1107 | switch (how) { |
sewardj | 018f762 | 2002-05-15 21:13:39 +0000 | [diff] [blame] | 1108 | case SIG_SETMASK: how = VKI_SIG_SETMASK; break; |
| 1109 | case SIG_BLOCK: how = VKI_SIG_BLOCK; break; |
| 1110 | case SIG_UNBLOCK: how = VKI_SIG_UNBLOCK; break; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1111 | default: pthread_error("pthread_sigmask: invalid how"); |
| 1112 | return EINVAL; |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1113 | } |
| 1114 | |
| 1115 | /* Crude check */ |
| 1116 | if (newmask == NULL) |
| 1117 | return EFAULT; |
| 1118 | |
| 1119 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1120 | VG_USERREQ__PTHREAD_SIGMASK, |
| 1121 | how, newmask, oldmask, 0); |
| 1122 | |
| 1123 | /* The scheduler tells us of any memory violations. */ |
| 1124 | return res == 0 ? 0 : EFAULT; |
| 1125 | } |
| 1126 | |
| 1127 | |
| 1128 | int sigwait ( const sigset_t* set, int* sig ) |
| 1129 | { |
| 1130 | int res; |
| 1131 | ensure_valgrind("sigwait"); |
| 1132 | /* As with pthread_sigmask we deliberately confuse sigset_t with |
| 1133 | vki_ksigset_t. */ |
| 1134 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1135 | VG_USERREQ__SIGWAIT, |
| 1136 | set, sig, 0, 0); |
| 1137 | return res; |
| 1138 | } |
| 1139 | |
| 1140 | |
sewardj | 018f762 | 2002-05-15 21:13:39 +0000 | [diff] [blame] | 1141 | int pthread_kill(pthread_t thread, int signo) |
| 1142 | { |
| 1143 | int res; |
| 1144 | ensure_valgrind("pthread_kill"); |
| 1145 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1146 | VG_USERREQ__PTHREAD_KILL, |
| 1147 | thread, signo, 0, 0); |
| 1148 | return res; |
| 1149 | } |
| 1150 | |
| 1151 | |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1152 | /* Copied verbatim from Linuxthreads */ |
| 1153 | /* Redefine raise() to send signal to calling thread only, |
| 1154 | as per POSIX 1003.1c */ |
| 1155 | int raise (int sig) |
| 1156 | { |
| 1157 | int retcode = pthread_kill(pthread_self(), sig); |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1158 | if (retcode == 0) { |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1159 | return 0; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1160 | } else { |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1161 | errno = retcode; |
| 1162 | return -1; |
| 1163 | } |
| 1164 | } |
| 1165 | |
| 1166 | |
sewardj | 9a2224b | 2002-06-19 10:17:40 +0000 | [diff] [blame] | 1167 | int pause ( void ) |
| 1168 | { |
| 1169 | unsigned int n_orig, n_now; |
| 1170 | struct vki_timespec nanosleep_interval; |
| 1171 | ensure_valgrind("pause"); |
| 1172 | |
| 1173 | /* This is surely a cancellation point. */ |
| 1174 | __my_pthread_testcancel(); |
| 1175 | |
| 1176 | VALGRIND_MAGIC_SEQUENCE(n_orig, 0xFFFFFFFF /* default */, |
| 1177 | VG_USERREQ__GET_N_SIGS_RETURNED, |
| 1178 | 0, 0, 0, 0); |
| 1179 | my_assert(n_orig != 0xFFFFFFFF); |
| 1180 | |
| 1181 | while (1) { |
| 1182 | VALGRIND_MAGIC_SEQUENCE(n_now, 0xFFFFFFFF /* default */, |
| 1183 | VG_USERREQ__GET_N_SIGS_RETURNED, |
| 1184 | 0, 0, 0, 0); |
| 1185 | my_assert(n_now != 0xFFFFFFFF); |
| 1186 | my_assert(n_now >= n_orig); |
| 1187 | if (n_now != n_orig) break; |
| 1188 | |
| 1189 | nanosleep_interval.tv_sec = 0; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1190 | nanosleep_interval.tv_nsec = 12 * 1000 * 1000; /* 12 milliseconds */ |
sewardj | 9a2224b | 2002-06-19 10:17:40 +0000 | [diff] [blame] | 1191 | /* It's critical here that valgrind's nanosleep implementation |
| 1192 | is nonblocking. */ |
| 1193 | (void)my_do_syscall2(__NR_nanosleep, |
| 1194 | (int)(&nanosleep_interval), (int)NULL); |
| 1195 | } |
| 1196 | |
| 1197 | * (__errno_location()) = EINTR; |
| 1198 | return -1; |
| 1199 | } |
| 1200 | |
| 1201 | |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1202 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1203 | THREAD-SPECIFICs |
| 1204 | ------------------------------------------------ */ |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1205 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1206 | int __pthread_key_create(pthread_key_t *key, |
| 1207 | void (*destr_function) (void *)) |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1208 | { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1209 | int res; |
| 1210 | ensure_valgrind("pthread_key_create"); |
| 1211 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1212 | VG_USERREQ__PTHREAD_KEY_CREATE, |
| 1213 | key, destr_function, 0, 0); |
| 1214 | return res; |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1215 | } |
| 1216 | |
| 1217 | int pthread_key_delete(pthread_key_t key) |
| 1218 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 1219 | static int moans = N_MOANS; |
| 1220 | if (moans-- > 0) |
| 1221 | ignored("pthread_key_delete"); |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1222 | return 0; |
| 1223 | } |
| 1224 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1225 | int __pthread_setspecific(pthread_key_t key, const void *pointer) |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1226 | { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1227 | int res; |
| 1228 | ensure_valgrind("pthread_setspecific"); |
| 1229 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1230 | VG_USERREQ__PTHREAD_SETSPECIFIC, |
| 1231 | key, pointer, 0, 0); |
| 1232 | return res; |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1233 | } |
| 1234 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1235 | void * __pthread_getspecific(pthread_key_t key) |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1236 | { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1237 | int res; |
| 1238 | ensure_valgrind("pthread_getspecific"); |
| 1239 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1240 | VG_USERREQ__PTHREAD_GETSPECIFIC, |
| 1241 | key, 0 , 0, 0); |
| 1242 | return (void*)res; |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1243 | } |
| 1244 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1245 | |
| 1246 | /* --------------------------------------------------- |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1247 | ONCEry |
| 1248 | ------------------------------------------------ */ |
| 1249 | |
| 1250 | static pthread_mutex_t once_masterlock = PTHREAD_MUTEX_INITIALIZER; |
| 1251 | |
| 1252 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1253 | int __pthread_once ( pthread_once_t *once_control, |
| 1254 | void (*init_routine) (void) ) |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1255 | { |
| 1256 | int res; |
| 1257 | ensure_valgrind("pthread_once"); |
| 1258 | |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 1259 | res = __pthread_mutex_lock(&once_masterlock); |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1260 | |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 1261 | if (res != 0) { |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1262 | barf("pthread_once: Looks like your program's " |
| 1263 | "init routine calls back to pthread_once() ?!"); |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 1264 | } |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1265 | |
| 1266 | if (*once_control == 0) { |
| 1267 | *once_control = 1; |
| 1268 | init_routine(); |
| 1269 | } |
| 1270 | |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 1271 | __pthread_mutex_unlock(&once_masterlock); |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1272 | |
| 1273 | return 0; |
| 1274 | } |
| 1275 | |
| 1276 | |
| 1277 | /* --------------------------------------------------- |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1278 | MISC |
| 1279 | ------------------------------------------------ */ |
| 1280 | |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 1281 | static pthread_mutex_t pthread_atfork_lock |
| 1282 | = PTHREAD_MUTEX_INITIALIZER; |
| 1283 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1284 | int __pthread_atfork ( void (*prepare)(void), |
| 1285 | void (*parent)(void), |
| 1286 | void (*child)(void) ) |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1287 | { |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 1288 | int n, res; |
| 1289 | ForkHandlerEntry entry; |
| 1290 | |
| 1291 | ensure_valgrind("pthread_atfork"); |
| 1292 | __pthread_mutex_lock(&pthread_atfork_lock); |
| 1293 | |
| 1294 | /* Fetch old counter */ |
| 1295 | VALGRIND_MAGIC_SEQUENCE(n, -2 /* default */, |
| 1296 | VG_USERREQ__GET_FHSTACK_USED, |
| 1297 | 0, 0, 0, 0); |
| 1298 | my_assert(n >= 0 && n < VG_N_FORKHANDLERSTACK); |
| 1299 | if (n == VG_N_FORKHANDLERSTACK-1) |
| 1300 | barf("pthread_atfork: VG_N_FORKHANDLERSTACK is too low; " |
| 1301 | "increase and recompile"); |
| 1302 | |
| 1303 | /* Add entry */ |
| 1304 | entry.prepare = *prepare; |
| 1305 | entry.parent = *parent; |
| 1306 | entry.child = *child; |
| 1307 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 1308 | VG_USERREQ__SET_FHSTACK_ENTRY, |
| 1309 | n, &entry, 0, 0); |
| 1310 | my_assert(res == 0); |
| 1311 | |
| 1312 | /* Bump counter */ |
| 1313 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 1314 | VG_USERREQ__SET_FHSTACK_USED, |
| 1315 | n+1, 0, 0, 0); |
| 1316 | my_assert(res == 0); |
| 1317 | |
| 1318 | __pthread_mutex_unlock(&pthread_atfork_lock); |
| 1319 | return 0; |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1320 | } |
| 1321 | |
| 1322 | |
sewardj | bb99078 | 2002-05-08 02:01:14 +0000 | [diff] [blame] | 1323 | __attribute__((weak)) |
| 1324 | void __pthread_initialize ( void ) |
| 1325 | { |
sewardj | bea1caa | 2002-05-10 23:20:58 +0000 | [diff] [blame] | 1326 | ensure_valgrind("__pthread_initialize"); |
sewardj | bb99078 | 2002-05-08 02:01:14 +0000 | [diff] [blame] | 1327 | } |
| 1328 | |
| 1329 | |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1330 | /* --------------------------------------------------- |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1331 | LIBRARY-PRIVATE THREAD SPECIFIC STATE |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1332 | ------------------------------------------------ */ |
| 1333 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1334 | #include <resolv.h> |
| 1335 | static int thread_specific_errno[VG_N_THREADS]; |
| 1336 | static int thread_specific_h_errno[VG_N_THREADS]; |
| 1337 | static struct __res_state |
| 1338 | thread_specific_res_state[VG_N_THREADS]; |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1339 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1340 | int* __errno_location ( void ) |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1341 | { |
| 1342 | int tid; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1343 | /* ensure_valgrind("__errno_location"); */ |
| 1344 | VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1345 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 1346 | 0, 0, 0, 0); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1347 | /* 'cos I'm paranoid ... */ |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 1348 | if (tid < 1 || tid >= VG_N_THREADS) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1349 | barf("__errno_location: invalid ThreadId"); |
| 1350 | return & thread_specific_errno[tid]; |
| 1351 | } |
| 1352 | |
| 1353 | int* __h_errno_location ( void ) |
| 1354 | { |
| 1355 | int tid; |
| 1356 | /* ensure_valgrind("__h_errno_location"); */ |
| 1357 | VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
| 1358 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 1359 | 0, 0, 0, 0); |
| 1360 | /* 'cos I'm paranoid ... */ |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 1361 | if (tid < 1 || tid >= VG_N_THREADS) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1362 | barf("__h_errno_location: invalid ThreadId"); |
| 1363 | return & thread_specific_h_errno[tid]; |
| 1364 | } |
| 1365 | |
sewardj | b0ff103 | 2002-08-06 09:02:53 +0000 | [diff] [blame] | 1366 | |
| 1367 | #undef _res |
| 1368 | extern struct __res_state _res; |
| 1369 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1370 | struct __res_state* __res_state ( void ) |
| 1371 | { |
| 1372 | int tid; |
| 1373 | /* ensure_valgrind("__res_state"); */ |
| 1374 | VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
| 1375 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 1376 | 0, 0, 0, 0); |
| 1377 | /* 'cos I'm paranoid ... */ |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 1378 | if (tid < 1 || tid >= VG_N_THREADS) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1379 | barf("__res_state: invalid ThreadId"); |
sewardj | b0ff103 | 2002-08-06 09:02:53 +0000 | [diff] [blame] | 1380 | if (tid == 1) |
| 1381 | return & _res; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1382 | return & thread_specific_res_state[tid]; |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1383 | } |
| 1384 | |
| 1385 | |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1386 | /* --------------------------------------------------- |
| 1387 | LIBC-PRIVATE SPECIFIC DATA |
| 1388 | ------------------------------------------------ */ |
| 1389 | |
| 1390 | /* Relies on assumption that initial private data is NULL. This |
| 1391 | should be fixed somehow. */ |
| 1392 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1393 | /* The allowable keys (indices) (all 3 of them). |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1394 | From sysdeps/pthread/bits/libc-tsd.h |
| 1395 | */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1396 | /* as per glibc anoncvs HEAD of 20021001. */ |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1397 | enum __libc_tsd_key_t { _LIBC_TSD_KEY_MALLOC = 0, |
| 1398 | _LIBC_TSD_KEY_DL_ERROR, |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1399 | _LIBC_TSD_KEY_RPC_VARS, |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1400 | _LIBC_TSD_KEY_LOCALE, |
| 1401 | _LIBC_TSD_KEY_CTYPE_B, |
| 1402 | _LIBC_TSD_KEY_CTYPE_TOLOWER, |
| 1403 | _LIBC_TSD_KEY_CTYPE_TOUPPER, |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1404 | _LIBC_TSD_KEY_N }; |
| 1405 | |
| 1406 | /* Auto-initialising subsystem. libc_specifics_inited is set |
| 1407 | after initialisation. libc_specifics_inited_mx guards it. */ |
| 1408 | static int libc_specifics_inited = 0; |
| 1409 | static pthread_mutex_t libc_specifics_inited_mx = PTHREAD_MUTEX_INITIALIZER; |
| 1410 | |
| 1411 | /* These are the keys we must initialise the first time. */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1412 | static pthread_key_t libc_specifics_keys[_LIBC_TSD_KEY_N]; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1413 | |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1414 | /* Initialise the keys, if they are not already initialised. */ |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1415 | static |
| 1416 | void init_libc_tsd_keys ( void ) |
| 1417 | { |
| 1418 | int res, i; |
| 1419 | pthread_key_t k; |
| 1420 | |
| 1421 | res = pthread_mutex_lock(&libc_specifics_inited_mx); |
| 1422 | if (res != 0) barf("init_libc_tsd_keys: lock"); |
| 1423 | |
| 1424 | if (libc_specifics_inited == 0) { |
| 1425 | /* printf("INIT libc specifics\n"); */ |
| 1426 | libc_specifics_inited = 1; |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1427 | for (i = 0; i < _LIBC_TSD_KEY_N; i++) { |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1428 | res = pthread_key_create(&k, NULL); |
| 1429 | if (res != 0) barf("init_libc_tsd_keys: create"); |
| 1430 | libc_specifics_keys[i] = k; |
| 1431 | } |
| 1432 | } |
| 1433 | |
| 1434 | res = pthread_mutex_unlock(&libc_specifics_inited_mx); |
| 1435 | if (res != 0) barf("init_libc_tsd_keys: unlock"); |
| 1436 | } |
| 1437 | |
| 1438 | |
| 1439 | static int |
| 1440 | libc_internal_tsd_set ( enum __libc_tsd_key_t key, |
| 1441 | const void * pointer ) |
| 1442 | { |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1443 | int res; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1444 | /* printf("SET SET SET key %d ptr %p\n", key, pointer); */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1445 | if (key < _LIBC_TSD_KEY_MALLOC || key >= _LIBC_TSD_KEY_N) |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1446 | barf("libc_internal_tsd_set: invalid key"); |
| 1447 | init_libc_tsd_keys(); |
| 1448 | res = pthread_setspecific(libc_specifics_keys[key], pointer); |
| 1449 | if (res != 0) barf("libc_internal_tsd_set: setspecific failed"); |
| 1450 | return 0; |
| 1451 | } |
| 1452 | |
| 1453 | static void * |
| 1454 | libc_internal_tsd_get ( enum __libc_tsd_key_t key ) |
| 1455 | { |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1456 | void* v; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1457 | /* printf("GET GET GET key %d\n", key); */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1458 | if (key < _LIBC_TSD_KEY_MALLOC || key >= _LIBC_TSD_KEY_N) |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1459 | barf("libc_internal_tsd_get: invalid key"); |
| 1460 | init_libc_tsd_keys(); |
| 1461 | v = pthread_getspecific(libc_specifics_keys[key]); |
| 1462 | /* if (v == NULL) barf("libc_internal_tsd_set: getspecific failed"); */ |
| 1463 | return v; |
| 1464 | } |
| 1465 | |
| 1466 | |
| 1467 | |
sewardj | 70adeb2 | 2002-04-27 01:35:38 +0000 | [diff] [blame] | 1468 | int (*__libc_internal_tsd_set) |
| 1469 | (enum __libc_tsd_key_t key, const void * pointer) |
| 1470 | = libc_internal_tsd_set; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1471 | |
sewardj | 70adeb2 | 2002-04-27 01:35:38 +0000 | [diff] [blame] | 1472 | void* (*__libc_internal_tsd_get) |
| 1473 | (enum __libc_tsd_key_t key) |
| 1474 | = libc_internal_tsd_get; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1475 | |
| 1476 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1477 | /* --------------------------------------------------------------------- |
| 1478 | These are here (I think) because they are deemed cancellation |
| 1479 | points by POSIX. For the moment we'll simply pass the call along |
| 1480 | to the corresponding thread-unaware (?) libc routine. |
| 1481 | ------------------------------------------------------------------ */ |
| 1482 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1483 | #include <stdlib.h> |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1484 | #include <sys/types.h> |
| 1485 | #include <sys/socket.h> |
| 1486 | |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 1487 | #ifdef GLIBC_2_1 |
| 1488 | extern |
| 1489 | int __sigaction |
| 1490 | (int signum, |
| 1491 | const struct sigaction *act, |
| 1492 | struct sigaction *oldact); |
| 1493 | #else |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1494 | extern |
| 1495 | int __libc_sigaction |
| 1496 | (int signum, |
| 1497 | const struct sigaction *act, |
| 1498 | struct sigaction *oldact); |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 1499 | #endif |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1500 | int sigaction(int signum, |
| 1501 | const struct sigaction *act, |
| 1502 | struct sigaction *oldact) |
| 1503 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1504 | __my_pthread_testcancel(); |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 1505 | # ifdef GLIBC_2_1 |
| 1506 | return __sigaction(signum, act, oldact); |
| 1507 | # else |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1508 | return __libc_sigaction(signum, act, oldact); |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 1509 | # endif |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1510 | } |
| 1511 | |
| 1512 | |
| 1513 | extern |
| 1514 | int __libc_connect(int sockfd, |
| 1515 | const struct sockaddr *serv_addr, |
| 1516 | socklen_t addrlen); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1517 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1518 | int connect(int sockfd, |
| 1519 | const struct sockaddr *serv_addr, |
| 1520 | socklen_t addrlen) |
| 1521 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1522 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1523 | return __libc_connect(sockfd, serv_addr, addrlen); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1524 | } |
| 1525 | |
| 1526 | |
| 1527 | extern |
| 1528 | int __libc_fcntl(int fd, int cmd, long arg); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1529 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1530 | int fcntl(int fd, int cmd, long arg) |
| 1531 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1532 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1533 | return __libc_fcntl(fd, cmd, arg); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1534 | } |
| 1535 | |
| 1536 | |
| 1537 | extern |
| 1538 | ssize_t __libc_write(int fd, const void *buf, size_t count); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1539 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1540 | ssize_t write(int fd, const void *buf, size_t count) |
| 1541 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1542 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1543 | return __libc_write(fd, buf, count); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1544 | } |
| 1545 | |
| 1546 | |
| 1547 | extern |
| 1548 | ssize_t __libc_read(int fd, void *buf, size_t count); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1549 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1550 | ssize_t read(int fd, void *buf, size_t count) |
| 1551 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1552 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1553 | return __libc_read(fd, buf, count); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1554 | } |
| 1555 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1556 | |
| 1557 | extern |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1558 | int __libc_open64(const char *pathname, int flags, mode_t mode); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1559 | __attribute__((weak)) |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1560 | int open64(const char *pathname, int flags, mode_t mode) |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1561 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1562 | __my_pthread_testcancel(); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1563 | return __libc_open64(pathname, flags, mode); |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1564 | } |
| 1565 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1566 | |
| 1567 | extern |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1568 | int __libc_open(const char *pathname, int flags, mode_t mode); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1569 | __attribute__((weak)) |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1570 | int open(const char *pathname, int flags, mode_t mode) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1571 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1572 | __my_pthread_testcancel(); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1573 | return __libc_open(pathname, flags, mode); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1574 | } |
| 1575 | |
| 1576 | |
| 1577 | extern |
| 1578 | int __libc_close(int fd); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1579 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1580 | int close(int fd) |
| 1581 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1582 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1583 | return __libc_close(fd); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1584 | } |
| 1585 | |
| 1586 | |
| 1587 | extern |
| 1588 | int __libc_accept(int s, struct sockaddr *addr, socklen_t *addrlen); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1589 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1590 | int accept(int s, struct sockaddr *addr, socklen_t *addrlen) |
| 1591 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1592 | __my_pthread_testcancel(); |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 1593 | wait_for_fd_to_be_readable_or_erring(s); |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1594 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1595 | return __libc_accept(s, addr, addrlen); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1596 | } |
| 1597 | |
| 1598 | |
| 1599 | extern |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1600 | pid_t __libc_waitpid(pid_t pid, int *status, int options); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1601 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1602 | pid_t waitpid(pid_t pid, int *status, int options) |
| 1603 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1604 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1605 | return __libc_waitpid(pid, status, options); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1606 | } |
| 1607 | |
| 1608 | |
| 1609 | extern |
| 1610 | int __libc_nanosleep(const struct timespec *req, struct timespec *rem); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1611 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1612 | int nanosleep(const struct timespec *req, struct timespec *rem) |
| 1613 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1614 | __my_pthread_testcancel(); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1615 | return __libc_nanosleep(req, rem); |
| 1616 | } |
| 1617 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1618 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1619 | extern |
| 1620 | int __libc_fsync(int fd); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1621 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1622 | int fsync(int fd) |
| 1623 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1624 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1625 | return __libc_fsync(fd); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1626 | } |
| 1627 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1628 | |
sewardj | 70c7536 | 2002-04-13 04:18:32 +0000 | [diff] [blame] | 1629 | extern |
| 1630 | off_t __libc_lseek(int fildes, off_t offset, int whence); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1631 | __attribute__((weak)) |
sewardj | 70c7536 | 2002-04-13 04:18:32 +0000 | [diff] [blame] | 1632 | off_t lseek(int fildes, off_t offset, int whence) |
| 1633 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1634 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1635 | return __libc_lseek(fildes, offset, whence); |
sewardj | 70c7536 | 2002-04-13 04:18:32 +0000 | [diff] [blame] | 1636 | } |
| 1637 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1638 | |
| 1639 | extern |
| 1640 | __off64_t __libc_lseek64(int fildes, __off64_t offset, int whence); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1641 | __attribute__((weak)) |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1642 | __off64_t lseek64(int fildes, __off64_t offset, int whence) |
| 1643 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1644 | __my_pthread_testcancel(); |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1645 | return __libc_lseek64(fildes, offset, whence); |
| 1646 | } |
| 1647 | |
| 1648 | |
sewardj | 726c412 | 2002-05-16 23:39:10 +0000 | [diff] [blame] | 1649 | extern |
| 1650 | ssize_t __libc_pread64 (int __fd, void *__buf, size_t __nbytes, |
| 1651 | __off64_t __offset); |
| 1652 | ssize_t __pread64 (int __fd, void *__buf, size_t __nbytes, |
| 1653 | __off64_t __offset) |
| 1654 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1655 | __my_pthread_testcancel(); |
sewardj | 726c412 | 2002-05-16 23:39:10 +0000 | [diff] [blame] | 1656 | return __libc_pread64(__fd, __buf, __nbytes, __offset); |
| 1657 | } |
| 1658 | |
| 1659 | |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 1660 | extern |
| 1661 | ssize_t __libc_pwrite64 (int __fd, const void *__buf, size_t __nbytes, |
| 1662 | __off64_t __offset); |
| 1663 | ssize_t __pwrite64 (int __fd, const void *__buf, size_t __nbytes, |
| 1664 | __off64_t __offset) |
| 1665 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1666 | __my_pthread_testcancel(); |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 1667 | return __libc_pwrite64(__fd, __buf, __nbytes, __offset); |
| 1668 | } |
| 1669 | |
sewardj | 726c412 | 2002-05-16 23:39:10 +0000 | [diff] [blame] | 1670 | |
sewardj | 39b93b1 | 2002-05-18 10:56:27 +0000 | [diff] [blame] | 1671 | extern |
| 1672 | ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset); |
| 1673 | __attribute__((weak)) |
| 1674 | ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset) |
| 1675 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1676 | __my_pthread_testcancel(); |
sewardj | 39b93b1 | 2002-05-18 10:56:27 +0000 | [diff] [blame] | 1677 | return __libc_pwrite(fd, buf, count, offset); |
| 1678 | } |
| 1679 | |
| 1680 | |
| 1681 | extern |
| 1682 | ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset); |
| 1683 | __attribute__((weak)) |
| 1684 | ssize_t pread(int fd, void *buf, size_t count, off_t offset) |
| 1685 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1686 | __my_pthread_testcancel(); |
sewardj | 39b93b1 | 2002-05-18 10:56:27 +0000 | [diff] [blame] | 1687 | return __libc_pread(fd, buf, count, offset); |
| 1688 | } |
| 1689 | |
| 1690 | |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 1691 | extern |
| 1692 | void __libc_longjmp(jmp_buf env, int val) __attribute((noreturn)); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1693 | /* not weak: __attribute__((weak)) */ |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 1694 | void longjmp(jmp_buf env, int val) |
| 1695 | { |
| 1696 | __libc_longjmp(env, val); |
| 1697 | } |
| 1698 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1699 | |
sewardj | 436c2db | 2002-06-18 09:07:54 +0000 | [diff] [blame] | 1700 | extern void __libc_siglongjmp (sigjmp_buf env, int val) |
| 1701 | __attribute__ ((noreturn)); |
| 1702 | void siglongjmp(sigjmp_buf env, int val) |
| 1703 | { |
| 1704 | kludged("siglongjmp (cleanup handlers are ignored)"); |
| 1705 | __libc_siglongjmp(env, val); |
| 1706 | } |
| 1707 | |
| 1708 | |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 1709 | extern |
| 1710 | int __libc_send(int s, const void *msg, size_t len, int flags); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1711 | __attribute__((weak)) |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 1712 | int send(int s, const void *msg, size_t len, int flags) |
| 1713 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1714 | __my_pthread_testcancel(); |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 1715 | return __libc_send(s, msg, len, flags); |
| 1716 | } |
| 1717 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1718 | |
sewardj | 1e8cdc9 | 2002-04-18 11:37:52 +0000 | [diff] [blame] | 1719 | extern |
| 1720 | int __libc_recv(int s, void *buf, size_t len, int flags); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1721 | __attribute__((weak)) |
sewardj | 1e8cdc9 | 2002-04-18 11:37:52 +0000 | [diff] [blame] | 1722 | int recv(int s, void *buf, size_t len, int flags) |
| 1723 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1724 | __my_pthread_testcancel(); |
sewardj | 1d6b3a2 | 2002-06-20 07:58:33 +0000 | [diff] [blame] | 1725 | wait_for_fd_to_be_readable_or_erring(s); |
| 1726 | __my_pthread_testcancel(); |
sewardj | 1e8cdc9 | 2002-04-18 11:37:52 +0000 | [diff] [blame] | 1727 | return __libc_recv(s, buf, len, flags); |
| 1728 | } |
| 1729 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1730 | |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1731 | extern |
| 1732 | int __libc_sendmsg(int s, const struct msghdr *msg, int flags); |
| 1733 | __attribute__((weak)) |
| 1734 | int sendmsg(int s, const struct msghdr *msg, int flags) |
| 1735 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1736 | __my_pthread_testcancel(); |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1737 | return __libc_sendmsg(s, msg, flags); |
| 1738 | } |
| 1739 | |
| 1740 | |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 1741 | extern |
sewardj | 59da27a | 2002-06-06 08:33:54 +0000 | [diff] [blame] | 1742 | int __libc_recvmsg(int s, struct msghdr *msg, int flags); |
| 1743 | __attribute__((weak)) |
| 1744 | int recvmsg(int s, struct msghdr *msg, int flags) |
| 1745 | { |
| 1746 | __my_pthread_testcancel(); |
| 1747 | return __libc_recvmsg(s, msg, flags); |
| 1748 | } |
| 1749 | |
| 1750 | |
| 1751 | extern |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 1752 | int __libc_recvfrom(int s, void *buf, size_t len, int flags, |
| 1753 | struct sockaddr *from, socklen_t *fromlen); |
| 1754 | __attribute__((weak)) |
| 1755 | int recvfrom(int s, void *buf, size_t len, int flags, |
| 1756 | struct sockaddr *from, socklen_t *fromlen) |
| 1757 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1758 | __my_pthread_testcancel(); |
sewardj | 2e20763 | 2002-06-13 17:29:53 +0000 | [diff] [blame] | 1759 | wait_for_fd_to_be_readable_or_erring(s); |
| 1760 | __my_pthread_testcancel(); |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 1761 | return __libc_recvfrom(s, buf, len, flags, from, fromlen); |
| 1762 | } |
| 1763 | |
| 1764 | |
| 1765 | extern |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 1766 | int __libc_sendto(int s, const void *msg, size_t len, int flags, |
| 1767 | const struct sockaddr *to, socklen_t tolen); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1768 | __attribute__((weak)) |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 1769 | int sendto(int s, const void *msg, size_t len, int flags, |
| 1770 | const struct sockaddr *to, socklen_t tolen) |
| 1771 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1772 | __my_pthread_testcancel(); |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 1773 | return __libc_sendto(s, msg, len, flags, to, tolen); |
| 1774 | } |
| 1775 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1776 | |
sewardj | 369b170 | 2002-04-24 13:28:15 +0000 | [diff] [blame] | 1777 | extern |
| 1778 | int __libc_system(const char* str); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1779 | __attribute__((weak)) |
sewardj | 369b170 | 2002-04-24 13:28:15 +0000 | [diff] [blame] | 1780 | int system(const char* str) |
| 1781 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1782 | __my_pthread_testcancel(); |
sewardj | 369b170 | 2002-04-24 13:28:15 +0000 | [diff] [blame] | 1783 | return __libc_system(str); |
| 1784 | } |
| 1785 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1786 | |
sewardj | ab0b1c3 | 2002-04-24 19:26:47 +0000 | [diff] [blame] | 1787 | extern |
| 1788 | pid_t __libc_wait(int *status); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1789 | __attribute__((weak)) |
sewardj | ab0b1c3 | 2002-04-24 19:26:47 +0000 | [diff] [blame] | 1790 | pid_t wait(int *status) |
| 1791 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1792 | __my_pthread_testcancel(); |
sewardj | ab0b1c3 | 2002-04-24 19:26:47 +0000 | [diff] [blame] | 1793 | return __libc_wait(status); |
| 1794 | } |
| 1795 | |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1796 | |
sewardj | 67f1d58 | 2002-05-24 02:11:32 +0000 | [diff] [blame] | 1797 | extern |
| 1798 | int __libc_msync(const void *start, size_t length, int flags); |
| 1799 | __attribute__((weak)) |
| 1800 | int msync(const void *start, size_t length, int flags) |
| 1801 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1802 | __my_pthread_testcancel(); |
sewardj | 67f1d58 | 2002-05-24 02:11:32 +0000 | [diff] [blame] | 1803 | return __libc_msync(start, length, flags); |
| 1804 | } |
| 1805 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1806 | |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 1807 | /*--- fork and its helper ---*/ |
| 1808 | |
| 1809 | static |
| 1810 | void run_fork_handlers ( int what ) |
| 1811 | { |
| 1812 | ForkHandlerEntry entry; |
| 1813 | int n_h, n_handlers, i, res; |
| 1814 | |
| 1815 | my_assert(what == 0 || what == 1 || what == 2); |
| 1816 | |
| 1817 | /* Fetch old counter */ |
| 1818 | VALGRIND_MAGIC_SEQUENCE(n_handlers, -2 /* default */, |
| 1819 | VG_USERREQ__GET_FHSTACK_USED, |
| 1820 | 0, 0, 0, 0); |
| 1821 | my_assert(n_handlers >= 0 && n_handlers < VG_N_FORKHANDLERSTACK); |
| 1822 | |
| 1823 | /* Prepare handlers (what == 0) are called in opposite order of |
| 1824 | calls to pthread_atfork. Parent and child handlers are called |
| 1825 | in the same order as calls to pthread_atfork. */ |
| 1826 | if (what == 0) |
| 1827 | n_h = n_handlers - 1; |
| 1828 | else |
| 1829 | n_h = 0; |
| 1830 | |
| 1831 | for (i = 0; i < n_handlers; i++) { |
| 1832 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 1833 | VG_USERREQ__GET_FHSTACK_ENTRY, |
| 1834 | n_h, &entry, 0, 0); |
| 1835 | my_assert(res == 0); |
| 1836 | switch (what) { |
| 1837 | case 0: if (entry.prepare) entry.prepare(); |
| 1838 | n_h--; break; |
| 1839 | case 1: if (entry.parent) entry.parent(); |
| 1840 | n_h++; break; |
| 1841 | case 2: if (entry.child) entry.child(); |
| 1842 | n_h++; break; |
| 1843 | default: barf("run_fork_handlers: invalid what"); |
| 1844 | } |
| 1845 | } |
| 1846 | |
| 1847 | if (what != 0 /* prepare */) { |
| 1848 | /* Empty out the stack. */ |
| 1849 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 1850 | VG_USERREQ__SET_FHSTACK_USED, |
| 1851 | 0, 0, 0, 0); |
| 1852 | my_assert(res == 0); |
| 1853 | } |
| 1854 | } |
| 1855 | |
| 1856 | extern |
| 1857 | pid_t __libc_fork(void); |
| 1858 | pid_t __fork(void) |
| 1859 | { |
| 1860 | pid_t pid; |
| 1861 | __my_pthread_testcancel(); |
| 1862 | __pthread_mutex_lock(&pthread_atfork_lock); |
| 1863 | |
| 1864 | run_fork_handlers(0 /* prepare */); |
| 1865 | pid = __libc_fork(); |
| 1866 | if (pid == 0) { |
| 1867 | /* I am the child */ |
| 1868 | run_fork_handlers(2 /* child */); |
| 1869 | __pthread_mutex_init(&pthread_atfork_lock, NULL); |
| 1870 | } else { |
| 1871 | /* I am the parent */ |
| 1872 | run_fork_handlers(1 /* parent */); |
| 1873 | __pthread_mutex_unlock(&pthread_atfork_lock); |
| 1874 | } |
| 1875 | return pid; |
| 1876 | } |
| 1877 | |
| 1878 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1879 | pid_t __vfork(void) |
| 1880 | { |
| 1881 | return __fork(); |
| 1882 | } |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 1883 | |
| 1884 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1885 | /* --------------------------------------------------------------------- |
| 1886 | Nonblocking implementations of select() and poll(). This stuff will |
| 1887 | surely rot your mind. |
| 1888 | ------------------------------------------------------------------ */ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1889 | |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1890 | /*--------------------------------------------------*/ |
| 1891 | |
| 1892 | #include "vg_kerneliface.h" |
| 1893 | |
| 1894 | static |
| 1895 | __inline__ |
| 1896 | int is_kerror ( int res ) |
| 1897 | { |
| 1898 | if (res >= -4095 && res <= -1) |
| 1899 | return 1; |
| 1900 | else |
| 1901 | return 0; |
| 1902 | } |
| 1903 | |
| 1904 | |
| 1905 | static |
| 1906 | int my_do_syscall1 ( int syscallno, int arg1 ) |
| 1907 | { |
| 1908 | int __res; |
| 1909 | __asm__ volatile ("pushl %%ebx; movl %%edx,%%ebx ; int $0x80 ; popl %%ebx" |
| 1910 | : "=a" (__res) |
| 1911 | : "0" (syscallno), |
| 1912 | "d" (arg1) ); |
| 1913 | return __res; |
| 1914 | } |
| 1915 | |
| 1916 | static |
| 1917 | int my_do_syscall2 ( int syscallno, |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 1918 | int arg1, int arg2 ) |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1919 | { |
| 1920 | int __res; |
| 1921 | __asm__ volatile ("pushl %%ebx; movl %%edx,%%ebx ; int $0x80 ; popl %%ebx" |
| 1922 | : "=a" (__res) |
| 1923 | : "0" (syscallno), |
| 1924 | "d" (arg1), |
| 1925 | "c" (arg2) ); |
| 1926 | return __res; |
| 1927 | } |
| 1928 | |
| 1929 | static |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 1930 | int my_do_syscall3 ( int syscallno, |
| 1931 | int arg1, int arg2, int arg3 ) |
| 1932 | { |
| 1933 | int __res; |
| 1934 | __asm__ volatile ("pushl %%ebx; movl %%esi,%%ebx ; int $0x80 ; popl %%ebx" |
| 1935 | : "=a" (__res) |
| 1936 | : "0" (syscallno), |
| 1937 | "S" (arg1), |
| 1938 | "c" (arg2), |
| 1939 | "d" (arg3) ); |
| 1940 | return __res; |
| 1941 | } |
| 1942 | |
| 1943 | static |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1944 | int do_syscall_select( int n, |
| 1945 | vki_fd_set* readfds, |
| 1946 | vki_fd_set* writefds, |
| 1947 | vki_fd_set* exceptfds, |
| 1948 | struct vki_timeval * timeout ) |
| 1949 | { |
| 1950 | int res; |
| 1951 | int args[5]; |
| 1952 | args[0] = n; |
| 1953 | args[1] = (int)readfds; |
| 1954 | args[2] = (int)writefds; |
| 1955 | args[3] = (int)exceptfds; |
| 1956 | args[4] = (int)timeout; |
| 1957 | res = my_do_syscall1(__NR_select, (int)(&(args[0])) ); |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 1958 | return res; |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1959 | } |
| 1960 | |
| 1961 | |
| 1962 | /* This is a wrapper round select(), which makes it thread-safe, |
| 1963 | meaning that only this thread will block, rather than the entire |
| 1964 | process. This wrapper in turn depends on nanosleep() not to block |
| 1965 | the entire process, but I think (hope? suspect?) that POSIX |
| 1966 | pthreads guarantees that to be the case. |
| 1967 | |
| 1968 | Basic idea is: modify the timeout parameter to select so that it |
| 1969 | returns immediately. Poll like this until select returns non-zero, |
| 1970 | indicating something interesting happened, or until our time is up. |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1971 | Space out the polls with nanosleeps of say 11 milliseconds, which |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1972 | is required to be nonblocking; this allows other threads to run. |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 1973 | |
| 1974 | Assumes: |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1975 | * (checked via my_assert) types fd_set and vki_fd_set are identical. |
| 1976 | * (checked via my_assert) types timeval and vki_timeval are identical. |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 1977 | * (unchecked) libc error numbers (EINTR etc) are the negation of the |
| 1978 | kernel's error numbers (VKI_EINTR etc). |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1979 | */ |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1980 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1981 | /* __attribute__((weak)) */ |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1982 | int select ( int n, |
| 1983 | fd_set *rfds, |
| 1984 | fd_set *wfds, |
| 1985 | fd_set *xfds, |
| 1986 | struct timeval *timeout ) |
| 1987 | { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1988 | unsigned int ms_now, ms_end; |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1989 | int res; |
| 1990 | fd_set rfds_copy; |
| 1991 | fd_set wfds_copy; |
| 1992 | fd_set xfds_copy; |
| 1993 | struct vki_timeval t_now; |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1994 | struct vki_timeval zero_timeout; |
| 1995 | struct vki_timespec nanosleep_interval; |
| 1996 | |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1997 | __my_pthread_testcancel(); |
| 1998 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1999 | /* gcc's complains about ms_end being used uninitialised -- classic |
| 2000 | case it can't understand, where ms_end is both defined and used |
| 2001 | only if timeout != NULL. Hence ... */ |
| 2002 | ms_end = 0; |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2003 | |
| 2004 | /* We assume that the kernel and libc data layouts are identical |
| 2005 | for the following types. These asserts provide a crude |
| 2006 | check. */ |
| 2007 | if (sizeof(fd_set) != sizeof(vki_fd_set) |
| 2008 | || sizeof(struct timeval) != sizeof(struct vki_timeval)) |
| 2009 | barf("valgrind's hacky non-blocking select(): data sizes error"); |
| 2010 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2011 | /* Detect the current time and simultaneously find out if we are |
| 2012 | running on Valgrind. */ |
| 2013 | VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| 2014 | VG_USERREQ__READ_MILLISECOND_TIMER, |
| 2015 | 0, 0, 0, 0); |
| 2016 | |
| 2017 | /* If a zero timeout specified, this call is harmless. Also go |
| 2018 | this route if we're not running on Valgrind, for whatever |
| 2019 | reason. */ |
| 2020 | if ( (timeout && timeout->tv_sec == 0 && timeout->tv_usec == 0) |
| 2021 | || (ms_now == 0xFFFFFFFF) ) { |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2022 | res = do_syscall_select( n, (vki_fd_set*)rfds, |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2023 | (vki_fd_set*)wfds, |
| 2024 | (vki_fd_set*)xfds, |
| 2025 | (struct vki_timeval*)timeout); |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2026 | if (is_kerror(res)) { |
| 2027 | * (__errno_location()) = -res; |
| 2028 | return -1; |
| 2029 | } else { |
| 2030 | return res; |
| 2031 | } |
| 2032 | } |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2033 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2034 | /* If a timeout was specified, set ms_end to be the end millisecond |
| 2035 | counter [wallclock] time. */ |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2036 | if (timeout) { |
| 2037 | res = my_do_syscall2(__NR_gettimeofday, (int)&t_now, (int)NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2038 | my_assert(res == 0); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2039 | ms_end = ms_now; |
| 2040 | ms_end += (timeout->tv_usec / 1000); |
| 2041 | ms_end += (timeout->tv_sec * 1000); |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2042 | /* Stay sane ... */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2043 | my_assert (ms_end >= ms_now); |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2044 | } |
| 2045 | |
| 2046 | /* fprintf(stderr, "MY_SELECT: before loop\n"); */ |
| 2047 | |
| 2048 | /* Either timeout == NULL, meaning wait indefinitely, or timeout != |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2049 | NULL, in which case ms_end holds the end time. */ |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2050 | |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2051 | while (1) { |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2052 | |
| 2053 | /* First, do a return-immediately select(). */ |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2054 | |
| 2055 | /* These could be trashed each time round the loop, so restore |
| 2056 | them each time. */ |
| 2057 | if (rfds) rfds_copy = *rfds; |
| 2058 | if (wfds) wfds_copy = *wfds; |
| 2059 | if (xfds) xfds_copy = *xfds; |
| 2060 | |
| 2061 | zero_timeout.tv_sec = zero_timeout.tv_usec = 0; |
| 2062 | |
| 2063 | res = do_syscall_select( n, |
| 2064 | rfds ? (vki_fd_set*)(&rfds_copy) : NULL, |
| 2065 | wfds ? (vki_fd_set*)(&wfds_copy) : NULL, |
| 2066 | xfds ? (vki_fd_set*)(&xfds_copy) : NULL, |
| 2067 | & zero_timeout ); |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2068 | if (is_kerror(res)) { |
| 2069 | /* Some kind of error (including EINTR). Set errno and |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2070 | return. The sets are unspecified in this case. */ |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2071 | * (__errno_location()) = -res; |
| 2072 | return -1; |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2073 | } |
| 2074 | if (res > 0) { |
| 2075 | /* one or more fds is ready. Copy out resulting sets and |
| 2076 | return. */ |
| 2077 | if (rfds) *rfds = rfds_copy; |
| 2078 | if (wfds) *wfds = wfds_copy; |
| 2079 | if (xfds) *xfds = xfds_copy; |
| 2080 | return res; |
| 2081 | } |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2082 | |
| 2083 | /* Nothing interesting happened, so we go to sleep for a |
| 2084 | while. */ |
| 2085 | |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2086 | /* fprintf(stderr, "MY_SELECT: nanosleep\n"); */ |
| 2087 | /* nanosleep and go round again */ |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2088 | nanosleep_interval.tv_sec = 0; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2089 | nanosleep_interval.tv_nsec = 11 * 1000 * 1000; /* 11 milliseconds */ |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2090 | /* It's critical here that valgrind's nanosleep implementation |
| 2091 | is nonblocking. */ |
sewardj | 645030e | 2002-06-06 01:27:39 +0000 | [diff] [blame] | 2092 | res = my_do_syscall2(__NR_nanosleep, |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2093 | (int)(&nanosleep_interval), (int)NULL); |
sewardj | 645030e | 2002-06-06 01:27:39 +0000 | [diff] [blame] | 2094 | if (res == -VKI_EINTR) { |
| 2095 | /* The nanosleep was interrupted by a signal. So we do the |
| 2096 | same. */ |
| 2097 | * (__errno_location()) = EINTR; |
| 2098 | return -1; |
| 2099 | } |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2100 | |
| 2101 | /* Sleeping finished. If a finite timeout, check to see if it |
| 2102 | has expired yet. */ |
| 2103 | if (timeout) { |
| 2104 | VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| 2105 | VG_USERREQ__READ_MILLISECOND_TIMER, |
| 2106 | 0, 0, 0, 0); |
| 2107 | my_assert(ms_now != 0xFFFFFFFF); |
| 2108 | if (ms_now >= ms_end) { |
| 2109 | /* timeout; nothing interesting happened. */ |
| 2110 | if (rfds) FD_ZERO(rfds); |
| 2111 | if (wfds) FD_ZERO(wfds); |
| 2112 | if (xfds) FD_ZERO(xfds); |
| 2113 | return 0; |
| 2114 | } |
| 2115 | } |
| 2116 | |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2117 | } |
| 2118 | } |
| 2119 | |
| 2120 | |
| 2121 | |
| 2122 | |
| 2123 | #include <sys/poll.h> |
| 2124 | |
sewardj | 3e909ce | 2002-06-03 13:27:15 +0000 | [diff] [blame] | 2125 | #ifndef HAVE_NFDS_T |
sewardj | 72d5848 | 2002-04-24 02:20:20 +0000 | [diff] [blame] | 2126 | typedef unsigned long int nfds_t; |
| 2127 | #endif |
| 2128 | |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 2129 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2130 | /* __attribute__((weak)) */ |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2131 | int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout) |
| 2132 | { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2133 | unsigned int ms_now, ms_end; |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2134 | int res, i; |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2135 | struct vki_timespec nanosleep_interval; |
| 2136 | |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2137 | __my_pthread_testcancel(); |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2138 | ensure_valgrind("poll"); |
| 2139 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2140 | /* Detect the current time and simultaneously find out if we are |
| 2141 | running on Valgrind. */ |
| 2142 | VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| 2143 | VG_USERREQ__READ_MILLISECOND_TIMER, |
| 2144 | 0, 0, 0, 0); |
| 2145 | |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2146 | if (/* CHECK SIZES FOR struct pollfd */ |
| 2147 | sizeof(struct timeval) != sizeof(struct vki_timeval)) |
| 2148 | barf("valgrind's hacky non-blocking poll(): data sizes error"); |
| 2149 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2150 | /* dummy initialisation to keep gcc -Wall happy */ |
| 2151 | ms_end = 0; |
| 2152 | |
| 2153 | /* If a zero timeout specified, this call is harmless. Also do |
| 2154 | this if not running on Valgrind. */ |
| 2155 | if (__timeout == 0 || ms_now == 0xFFFFFFFF) { |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2156 | res = my_do_syscall3(__NR_poll, (int)__fds, __nfds, __timeout); |
| 2157 | if (is_kerror(res)) { |
| 2158 | * (__errno_location()) = -res; |
| 2159 | return -1; |
| 2160 | } else { |
| 2161 | return res; |
| 2162 | } |
| 2163 | } |
| 2164 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2165 | /* If a timeout was specified, set ms_end to be the end wallclock |
| 2166 | time. Easy considering that __timeout is in milliseconds. */ |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2167 | if (__timeout > 0) { |
sewardj | 650ac00 | 2002-04-29 12:20:34 +0000 | [diff] [blame] | 2168 | ms_end = ms_now + (unsigned int)__timeout; |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2169 | } |
| 2170 | |
| 2171 | /* fprintf(stderr, "MY_POLL: before loop\n"); */ |
| 2172 | |
| 2173 | /* Either timeout < 0, meaning wait indefinitely, or timeout > 0, |
| 2174 | in which case t_end holds the end time. */ |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2175 | |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2176 | my_assert(__timeout != 0); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2177 | |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2178 | while (1) { |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2179 | |
| 2180 | /* Do a return-immediately poll. */ |
| 2181 | |
| 2182 | res = my_do_syscall3(__NR_poll, (int)__fds, __nfds, 0 ); |
| 2183 | if (is_kerror(res)) { |
| 2184 | /* Some kind of error. Set errno and return. */ |
| 2185 | * (__errno_location()) = -res; |
| 2186 | return -1; |
| 2187 | } |
| 2188 | if (res > 0) { |
| 2189 | /* One or more fds is ready. Return now. */ |
| 2190 | return res; |
| 2191 | } |
| 2192 | |
| 2193 | /* Nothing interesting happened, so we go to sleep for a |
| 2194 | while. */ |
| 2195 | |
| 2196 | /* fprintf(stderr, "MY_POLL: nanosleep\n"); */ |
| 2197 | /* nanosleep and go round again */ |
| 2198 | nanosleep_interval.tv_sec = 0; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2199 | nanosleep_interval.tv_nsec = 13 * 1000 * 1000; /* 13 milliseconds */ |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2200 | /* It's critical here that valgrind's nanosleep implementation |
| 2201 | is nonblocking. */ |
| 2202 | (void)my_do_syscall2(__NR_nanosleep, |
| 2203 | (int)(&nanosleep_interval), (int)NULL); |
| 2204 | |
| 2205 | /* Sleeping finished. If a finite timeout, check to see if it |
| 2206 | has expired yet. */ |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2207 | if (__timeout > 0) { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2208 | VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| 2209 | VG_USERREQ__READ_MILLISECOND_TIMER, |
| 2210 | 0, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2211 | my_assert(ms_now != 0xFFFFFFFF); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2212 | if (ms_now >= ms_end) { |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2213 | /* timeout; nothing interesting happened. */ |
| 2214 | for (i = 0; i < __nfds; i++) |
| 2215 | __fds[i].revents = 0; |
| 2216 | return 0; |
| 2217 | } |
| 2218 | } |
| 2219 | |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2220 | } |
| 2221 | } |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2222 | |
| 2223 | |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 2224 | /* Helper function used to make accept() non-blocking. Idea is to use |
| 2225 | the above nonblocking poll() to make this thread ONLY wait for the |
| 2226 | specified fd to become ready, and then return. */ |
sewardj | d1c1cf2 | 2002-06-26 00:13:36 +0000 | [diff] [blame] | 2227 | |
| 2228 | /* Sigh -- a hack. We're not supposed to include this file directly; |
| 2229 | should do it via /usr/include/fcntl.h, but that introduces a |
| 2230 | varargs prototype for fcntl itself, which we can't mimic. */ |
| 2231 | #define _FCNTL_H |
| 2232 | #include <bits/fcntl.h> |
| 2233 | |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 2234 | static void wait_for_fd_to_be_readable_or_erring ( int fd ) |
| 2235 | { |
| 2236 | struct pollfd pfd; |
sewardj | d1c1cf2 | 2002-06-26 00:13:36 +0000 | [diff] [blame] | 2237 | int res; |
| 2238 | |
sewardj | 6e6cbaa | 2002-05-24 02:12:52 +0000 | [diff] [blame] | 2239 | /* fprintf(stderr, "wait_for_fd_to_be_readable_or_erring %d\n", fd); */ |
sewardj | d1c1cf2 | 2002-06-26 00:13:36 +0000 | [diff] [blame] | 2240 | |
| 2241 | /* First check to see if the fd is nonblocking, and/or invalid. In |
| 2242 | either case return immediately. */ |
| 2243 | res = __libc_fcntl(fd, F_GETFL, 0); |
| 2244 | if (res == -1) return; /* fd is invalid somehow */ |
| 2245 | if (res & O_NONBLOCK) return; /* fd is nonblocking */ |
| 2246 | |
| 2247 | /* Ok, we'd better wait with poll. */ |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 2248 | pfd.fd = fd; |
| 2249 | pfd.events = POLLIN | POLLPRI | POLLERR | POLLHUP | POLLNVAL; |
| 2250 | /* ... but not POLLOUT, you may notice. */ |
| 2251 | pfd.revents = 0; |
| 2252 | (void)poll(&pfd, 1, -1 /* forever */); |
| 2253 | } |
| 2254 | |
| 2255 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2256 | /* --------------------------------------------------------------------- |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2257 | Hacky implementation of semaphores. |
| 2258 | ------------------------------------------------------------------ */ |
| 2259 | |
| 2260 | #include <semaphore.h> |
| 2261 | |
| 2262 | /* This is a terrible way to do the remapping. Plan is to import an |
| 2263 | AVL tree at some point. */ |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2264 | |
| 2265 | typedef |
| 2266 | struct { |
| 2267 | pthread_mutex_t se_mx; |
| 2268 | pthread_cond_t se_cv; |
| 2269 | int count; |
| 2270 | } |
| 2271 | vg_sem_t; |
| 2272 | |
| 2273 | static pthread_mutex_t se_remap_mx = PTHREAD_MUTEX_INITIALIZER; |
| 2274 | |
| 2275 | static int se_remap_used = 0; |
| 2276 | static sem_t* se_remap_orig[VG_N_SEMAPHORES]; |
| 2277 | static vg_sem_t se_remap_new[VG_N_SEMAPHORES]; |
| 2278 | |
| 2279 | static vg_sem_t* se_remap ( sem_t* orig ) |
| 2280 | { |
| 2281 | int res, i; |
| 2282 | res = __pthread_mutex_lock(&se_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2283 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2284 | |
| 2285 | for (i = 0; i < se_remap_used; i++) { |
| 2286 | if (se_remap_orig[i] == orig) |
| 2287 | break; |
| 2288 | } |
| 2289 | if (i == se_remap_used) { |
| 2290 | if (se_remap_used == VG_N_SEMAPHORES) { |
| 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 | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2293 | barf("VG_N_SEMAPHORES is too low. Increase and recompile."); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2294 | } |
| 2295 | se_remap_used++; |
| 2296 | se_remap_orig[i] = orig; |
| 2297 | /* printf("allocated semaphore %d\n", i); */ |
| 2298 | } |
| 2299 | res = __pthread_mutex_unlock(&se_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2300 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2301 | return &se_remap_new[i]; |
| 2302 | } |
| 2303 | |
| 2304 | |
| 2305 | int sem_init(sem_t *sem, int pshared, unsigned int value) |
| 2306 | { |
| 2307 | int res; |
| 2308 | vg_sem_t* vg_sem; |
| 2309 | ensure_valgrind("sem_init"); |
| 2310 | if (pshared != 0) { |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 2311 | pthread_error("sem_init: unsupported pshared value"); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2312 | errno = ENOSYS; |
| 2313 | return -1; |
| 2314 | } |
| 2315 | vg_sem = se_remap(sem); |
| 2316 | res = pthread_mutex_init(&vg_sem->se_mx, NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2317 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2318 | res = pthread_cond_init(&vg_sem->se_cv, NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2319 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2320 | vg_sem->count = value; |
| 2321 | return 0; |
| 2322 | } |
| 2323 | |
| 2324 | |
| 2325 | int sem_wait ( sem_t* sem ) |
| 2326 | { |
| 2327 | int res; |
| 2328 | vg_sem_t* vg_sem; |
| 2329 | ensure_valgrind("sem_wait"); |
| 2330 | vg_sem = se_remap(sem); |
| 2331 | res = __pthread_mutex_lock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2332 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2333 | while (vg_sem->count == 0) { |
| 2334 | res = pthread_cond_wait(&vg_sem->se_cv, &vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2335 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2336 | } |
| 2337 | vg_sem->count--; |
| 2338 | res = __pthread_mutex_unlock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2339 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2340 | return 0; |
| 2341 | } |
| 2342 | |
| 2343 | int sem_post ( sem_t* sem ) |
| 2344 | { |
| 2345 | int res; |
| 2346 | vg_sem_t* vg_sem; |
| 2347 | ensure_valgrind("sem_post"); |
| 2348 | vg_sem = se_remap(sem); |
| 2349 | res = __pthread_mutex_lock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2350 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2351 | if (vg_sem->count == 0) { |
| 2352 | vg_sem->count++; |
| 2353 | res = pthread_cond_broadcast(&vg_sem->se_cv); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2354 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2355 | } else { |
| 2356 | vg_sem->count++; |
| 2357 | } |
| 2358 | res = __pthread_mutex_unlock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2359 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2360 | return 0; |
| 2361 | } |
| 2362 | |
| 2363 | |
| 2364 | int sem_trywait ( sem_t* sem ) |
| 2365 | { |
| 2366 | int ret, res; |
| 2367 | vg_sem_t* vg_sem; |
| 2368 | ensure_valgrind("sem_trywait"); |
| 2369 | vg_sem = se_remap(sem); |
| 2370 | res = __pthread_mutex_lock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2371 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2372 | if (vg_sem->count > 0) { |
| 2373 | vg_sem->count--; |
| 2374 | ret = 0; |
| 2375 | } else { |
| 2376 | ret = -1; |
| 2377 | errno = EAGAIN; |
| 2378 | } |
| 2379 | res = __pthread_mutex_unlock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2380 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2381 | return ret; |
| 2382 | } |
| 2383 | |
| 2384 | |
| 2385 | int sem_getvalue(sem_t* sem, int * sval) |
| 2386 | { |
| 2387 | vg_sem_t* vg_sem; |
| 2388 | ensure_valgrind("sem_trywait"); |
| 2389 | vg_sem = se_remap(sem); |
| 2390 | *sval = vg_sem->count; |
| 2391 | return 0; |
| 2392 | } |
| 2393 | |
| 2394 | |
| 2395 | int sem_destroy(sem_t * sem) |
| 2396 | { |
| 2397 | kludged("sem_destroy"); |
| 2398 | /* if someone waiting on this semaphore, errno = EBUSY, return -1 */ |
| 2399 | return 0; |
| 2400 | } |
| 2401 | |
| 2402 | |
| 2403 | /* --------------------------------------------------------------------- |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2404 | Reader-writer locks. |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2405 | ------------------------------------------------------------------ */ |
| 2406 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2407 | typedef |
| 2408 | struct { |
| 2409 | int initted; /* != 0 --> in use; sanity check only */ |
| 2410 | int prefer_w; /* != 0 --> prefer writer */ |
| 2411 | int nwait_r; /* # of waiting readers */ |
| 2412 | int nwait_w; /* # of waiting writers */ |
| 2413 | pthread_cond_t cv_r; /* for signalling readers */ |
| 2414 | pthread_cond_t cv_w; /* for signalling writers */ |
| 2415 | pthread_mutex_t mx; |
| 2416 | int status; |
| 2417 | /* allowed range for status: >= -1. -1 means 1 writer currently |
| 2418 | active, >= 0 means N readers currently active. */ |
| 2419 | } |
| 2420 | vg_rwlock_t; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2421 | |
| 2422 | |
| 2423 | static pthread_mutex_t rw_remap_mx = PTHREAD_MUTEX_INITIALIZER; |
| 2424 | |
| 2425 | static int rw_remap_used = 0; |
| 2426 | static pthread_rwlock_t* rw_remap_orig[VG_N_RWLOCKS]; |
| 2427 | static vg_rwlock_t rw_remap_new[VG_N_RWLOCKS]; |
| 2428 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2429 | |
| 2430 | static |
| 2431 | void init_vg_rwlock ( vg_rwlock_t* vg_rwl ) |
| 2432 | { |
| 2433 | int res = 0; |
| 2434 | vg_rwl->initted = 1; |
| 2435 | vg_rwl->prefer_w = 1; |
| 2436 | vg_rwl->nwait_r = 0; |
| 2437 | vg_rwl->nwait_w = 0; |
| 2438 | vg_rwl->status = 0; |
| 2439 | res = pthread_mutex_init(&vg_rwl->mx, NULL); |
| 2440 | res |= pthread_cond_init(&vg_rwl->cv_r, NULL); |
| 2441 | res |= pthread_cond_init(&vg_rwl->cv_w, NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2442 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2443 | } |
| 2444 | |
| 2445 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2446 | /* Take the address of a LinuxThreads rwlock_t and return the shadow |
| 2447 | address of our version. Further, if the LinuxThreads version |
| 2448 | appears to have been statically initialised, do the same to the one |
| 2449 | we allocate here. The pthread_rwlock_t.__rw_readers field is set |
| 2450 | to zero by PTHREAD_RWLOCK_INITIALIZER, so we take zero as meaning |
| 2451 | uninitialised and non-zero meaning initialised. |
| 2452 | */ |
| 2453 | static vg_rwlock_t* rw_remap ( pthread_rwlock_t* orig ) |
| 2454 | { |
| 2455 | int res, i; |
| 2456 | vg_rwlock_t* vg_rwl; |
| 2457 | res = __pthread_mutex_lock(&rw_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2458 | my_assert(res == 0); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2459 | |
| 2460 | for (i = 0; i < rw_remap_used; i++) { |
| 2461 | if (rw_remap_orig[i] == orig) |
| 2462 | break; |
| 2463 | } |
| 2464 | if (i == rw_remap_used) { |
| 2465 | if (rw_remap_used == VG_N_RWLOCKS) { |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2466 | res = __pthread_mutex_unlock(&rw_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2467 | my_assert(res == 0); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2468 | barf("VG_N_RWLOCKS is too low. Increase and recompile."); |
| 2469 | } |
| 2470 | rw_remap_used++; |
| 2471 | rw_remap_orig[i] = orig; |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2472 | rw_remap_new[i].initted = 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2473 | if (0) printf("allocated rwlock %d\n", i); |
| 2474 | } |
| 2475 | res = __pthread_mutex_unlock(&rw_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2476 | my_assert(res == 0); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2477 | vg_rwl = &rw_remap_new[i]; |
| 2478 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2479 | /* Initialise the shadow, if required. */ |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2480 | if (orig->__rw_readers == 0) { |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2481 | orig->__rw_readers = 1; |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2482 | init_vg_rwlock(vg_rwl); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2483 | if (orig->__rw_kind == PTHREAD_RWLOCK_PREFER_READER_NP) |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2484 | vg_rwl->prefer_w = 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2485 | } |
| 2486 | |
| 2487 | return vg_rwl; |
| 2488 | } |
| 2489 | |
| 2490 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2491 | int pthread_rwlock_init ( pthread_rwlock_t* orig, |
| 2492 | const pthread_rwlockattr_t* attr ) |
| 2493 | { |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2494 | vg_rwlock_t* rwl; |
| 2495 | if (0) printf ("pthread_rwlock_init\n"); |
| 2496 | /* Force the remapper to initialise the shadow. */ |
| 2497 | orig->__rw_readers = 0; |
| 2498 | /* Install the lock preference; the remapper needs to know it. */ |
| 2499 | orig->__rw_kind = PTHREAD_RWLOCK_DEFAULT_NP; |
| 2500 | if (attr) |
| 2501 | orig->__rw_kind = attr->__lockkind; |
| 2502 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2503 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2504 | } |
| 2505 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2506 | |
| 2507 | static |
| 2508 | void pthread_rwlock_rdlock_CANCEL_HDLR ( void* rwl_v ) |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2509 | { |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2510 | vg_rwlock_t* rwl = (vg_rwlock_t*)rwl_v; |
| 2511 | rwl->nwait_r--; |
| 2512 | pthread_mutex_unlock (&rwl->mx); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2513 | } |
| 2514 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2515 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2516 | int pthread_rwlock_rdlock ( pthread_rwlock_t* orig ) |
| 2517 | { |
| 2518 | int res; |
| 2519 | vg_rwlock_t* rwl; |
| 2520 | if (0) printf ("pthread_rwlock_rdlock\n"); |
| 2521 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2522 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2523 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2524 | if (!rwl->initted) { |
| 2525 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2526 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2527 | return EINVAL; |
| 2528 | } |
| 2529 | if (rwl->status < 0) { |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2530 | my_assert(rwl->status == -1); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2531 | rwl->nwait_r++; |
| 2532 | pthread_cleanup_push( pthread_rwlock_rdlock_CANCEL_HDLR, rwl ); |
| 2533 | while (1) { |
| 2534 | if (rwl->status == 0) break; |
| 2535 | res = pthread_cond_wait(&rwl->cv_r, &rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2536 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2537 | } |
| 2538 | pthread_cleanup_pop(0); |
| 2539 | rwl->nwait_r--; |
| 2540 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2541 | my_assert(rwl->status >= 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2542 | rwl->status++; |
| 2543 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2544 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2545 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2546 | } |
| 2547 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2548 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2549 | int pthread_rwlock_tryrdlock ( pthread_rwlock_t* orig ) |
| 2550 | { |
| 2551 | int res; |
| 2552 | vg_rwlock_t* rwl; |
| 2553 | if (0) printf ("pthread_rwlock_tryrdlock\n"); |
| 2554 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2555 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2556 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2557 | if (!rwl->initted) { |
| 2558 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2559 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2560 | return EINVAL; |
| 2561 | } |
| 2562 | if (rwl->status == -1) { |
| 2563 | /* Writer active; we have to give up. */ |
| 2564 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2565 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2566 | return EBUSY; |
| 2567 | } |
| 2568 | /* Success */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2569 | my_assert(rwl->status >= 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2570 | rwl->status++; |
| 2571 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2572 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2573 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2574 | } |
| 2575 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2576 | |
| 2577 | static |
| 2578 | void pthread_rwlock_wrlock_CANCEL_HDLR ( void* rwl_v ) |
| 2579 | { |
| 2580 | vg_rwlock_t* rwl = (vg_rwlock_t*)rwl_v; |
| 2581 | rwl->nwait_w--; |
| 2582 | pthread_mutex_unlock (&rwl->mx); |
| 2583 | } |
| 2584 | |
| 2585 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2586 | int pthread_rwlock_wrlock ( pthread_rwlock_t* orig ) |
| 2587 | { |
| 2588 | int res; |
| 2589 | vg_rwlock_t* rwl; |
| 2590 | if (0) printf ("pthread_rwlock_wrlock\n"); |
| 2591 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2592 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2593 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2594 | if (!rwl->initted) { |
| 2595 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2596 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2597 | return EINVAL; |
| 2598 | } |
| 2599 | if (rwl->status != 0) { |
| 2600 | rwl->nwait_w++; |
| 2601 | pthread_cleanup_push( pthread_rwlock_wrlock_CANCEL_HDLR, rwl ); |
| 2602 | while (1) { |
| 2603 | if (rwl->status == 0) break; |
| 2604 | res = pthread_cond_wait(&rwl->cv_w, &rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2605 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2606 | } |
| 2607 | pthread_cleanup_pop(0); |
| 2608 | rwl->nwait_w--; |
| 2609 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2610 | my_assert(rwl->status == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2611 | rwl->status = -1; |
| 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 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2615 | } |
| 2616 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2617 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2618 | int pthread_rwlock_trywrlock ( pthread_rwlock_t* orig ) |
| 2619 | { |
| 2620 | int res; |
| 2621 | vg_rwlock_t* rwl; |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2622 | if (0) printf ("pthread_wrlock_trywrlock\n"); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2623 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2624 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2625 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2626 | if (!rwl->initted) { |
| 2627 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2628 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2629 | return EINVAL; |
| 2630 | } |
| 2631 | if (rwl->status != 0) { |
| 2632 | /* Reader(s) or a writer active; we have to give up. */ |
| 2633 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2634 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2635 | return EBUSY; |
| 2636 | } |
| 2637 | /* Success */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2638 | my_assert(rwl->status == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2639 | rwl->status = -1; |
| 2640 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2641 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2642 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2643 | } |
| 2644 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2645 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2646 | int pthread_rwlock_unlock ( pthread_rwlock_t* orig ) |
| 2647 | { |
| 2648 | int res; |
| 2649 | vg_rwlock_t* rwl; |
| 2650 | if (0) printf ("pthread_rwlock_unlock\n"); |
| 2651 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2652 | rwl = rw_remap ( orig ); |
| 2653 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2654 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2655 | if (!rwl->initted) { |
| 2656 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2657 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2658 | return EINVAL; |
| 2659 | } |
| 2660 | if (rwl->status == 0) { |
| 2661 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2662 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2663 | return EPERM; |
| 2664 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2665 | my_assert(rwl->status != 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2666 | if (rwl->status == -1) { |
| 2667 | rwl->status = 0; |
| 2668 | } else { |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2669 | my_assert(rwl->status > 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2670 | rwl->status--; |
| 2671 | } |
| 2672 | |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2673 | my_assert(rwl->status >= 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2674 | |
| 2675 | if (rwl->prefer_w) { |
| 2676 | |
| 2677 | /* Favour waiting writers, if any. */ |
| 2678 | if (rwl->nwait_w > 0) { |
| 2679 | /* Writer(s) are waiting. */ |
| 2680 | if (rwl->status == 0) { |
| 2681 | /* We can let a writer in. */ |
| 2682 | res = pthread_cond_signal(&rwl->cv_w); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2683 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2684 | } else { |
| 2685 | /* There are still readers active. Do nothing; eventually |
| 2686 | they will disappear, at which point a writer will be |
| 2687 | admitted. */ |
| 2688 | } |
| 2689 | } |
| 2690 | else |
| 2691 | /* No waiting writers. */ |
| 2692 | if (rwl->nwait_r > 0) { |
| 2693 | /* Let in a waiting reader. */ |
| 2694 | res = pthread_cond_signal(&rwl->cv_r); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2695 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2696 | } |
| 2697 | |
| 2698 | } else { |
| 2699 | |
| 2700 | /* Favour waiting readers, if any. */ |
| 2701 | if (rwl->nwait_r > 0) { |
| 2702 | /* Reader(s) are waiting; let one in. */ |
| 2703 | res = pthread_cond_signal(&rwl->cv_r); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2704 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2705 | } |
| 2706 | else |
| 2707 | /* No waiting readers. */ |
| 2708 | if (rwl->nwait_w > 0 && rwl->status == 0) { |
| 2709 | /* We have waiting writers and no active readers; let a |
| 2710 | writer in. */ |
| 2711 | res = pthread_cond_signal(&rwl->cv_w); |
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 | |
| 2716 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2717 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2718 | return 0; |
| 2719 | } |
| 2720 | |
| 2721 | |
| 2722 | int pthread_rwlock_destroy ( pthread_rwlock_t *orig ) |
| 2723 | { |
| 2724 | int res; |
| 2725 | vg_rwlock_t* rwl; |
| 2726 | if (0) printf ("pthread_rwlock_destroy\n"); |
| 2727 | rwl = rw_remap ( orig ); |
| 2728 | res = __pthread_mutex_lock(&rwl->mx); |
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 | if (!rwl->initted) { |
| 2731 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2732 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2733 | return EINVAL; |
| 2734 | } |
| 2735 | if (rwl->status != 0 || rwl->nwait_r > 0 || rwl->nwait_w > 0) { |
| 2736 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2737 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2738 | return EBUSY; |
| 2739 | } |
| 2740 | rwl->initted = 0; |
| 2741 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2742 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2743 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2744 | } |
| 2745 | |
| 2746 | |
sewardj | 47e4e31 | 2002-06-18 09:24:34 +0000 | [diff] [blame] | 2747 | /* Copied directly from LinuxThreads. */ |
| 2748 | int |
| 2749 | pthread_rwlockattr_init (pthread_rwlockattr_t *attr) |
| 2750 | { |
| 2751 | attr->__lockkind = 0; |
| 2752 | attr->__pshared = PTHREAD_PROCESS_PRIVATE; |
| 2753 | |
| 2754 | return 0; |
| 2755 | } |
| 2756 | |
sewardj | fe18eb8 | 2002-07-13 12:58:44 +0000 | [diff] [blame] | 2757 | /* Copied directly from LinuxThreads. */ |
| 2758 | int |
| 2759 | pthread_rwlockattr_setpshared (pthread_rwlockattr_t *attr, int pshared) |
| 2760 | { |
| 2761 | if (pshared != PTHREAD_PROCESS_PRIVATE && pshared != PTHREAD_PROCESS_SHARED) |
| 2762 | return EINVAL; |
| 2763 | |
| 2764 | /* For now it is not possible to shared a conditional variable. */ |
| 2765 | if (pshared != PTHREAD_PROCESS_PRIVATE) |
| 2766 | return ENOSYS; |
| 2767 | |
| 2768 | attr->__pshared = pshared; |
| 2769 | |
| 2770 | return 0; |
| 2771 | } |
| 2772 | |
sewardj | 47e4e31 | 2002-06-18 09:24:34 +0000 | [diff] [blame] | 2773 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2774 | /* --------------------------------------------------------------------- |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2775 | B'stard. |
| 2776 | ------------------------------------------------------------------ */ |
| 2777 | |
| 2778 | # define strong_alias(name, aliasname) \ |
| 2779 | extern __typeof (name) aliasname __attribute__ ((alias (#name))); |
| 2780 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2781 | # define weak_alias(name, aliasname) \ |
| 2782 | extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2783 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2784 | strong_alias(__pthread_mutex_lock, pthread_mutex_lock) |
| 2785 | strong_alias(__pthread_mutex_trylock, pthread_mutex_trylock) |
| 2786 | strong_alias(__pthread_mutex_unlock, pthread_mutex_unlock) |
| 2787 | strong_alias(__pthread_mutexattr_init, pthread_mutexattr_init) |
| 2788 | weak_alias(__pthread_mutexattr_settype, pthread_mutexattr_settype) |
| 2789 | strong_alias(__pthread_mutex_init, pthread_mutex_init) |
| 2790 | strong_alias(__pthread_mutexattr_destroy, pthread_mutexattr_destroy) |
| 2791 | strong_alias(__pthread_mutex_destroy, pthread_mutex_destroy) |
| 2792 | strong_alias(__pthread_once, pthread_once) |
| 2793 | strong_alias(__pthread_atfork, pthread_atfork) |
| 2794 | strong_alias(__pthread_key_create, pthread_key_create) |
| 2795 | strong_alias(__pthread_getspecific, pthread_getspecific) |
| 2796 | strong_alias(__pthread_setspecific, pthread_setspecific) |
| 2797 | |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 2798 | #ifndef GLIBC_2_1 |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2799 | strong_alias(sigaction, __sigaction) |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 2800 | #endif |
| 2801 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2802 | strong_alias(close, __close) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2803 | strong_alias(fcntl, __fcntl) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2804 | strong_alias(lseek, __lseek) |
| 2805 | strong_alias(open, __open) |
| 2806 | strong_alias(open64, __open64) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2807 | strong_alias(read, __read) |
| 2808 | strong_alias(wait, __wait) |
| 2809 | strong_alias(write, __write) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2810 | strong_alias(connect, __connect) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2811 | strong_alias(send, __send) |
| 2812 | |
sewardj | 726c412 | 2002-05-16 23:39:10 +0000 | [diff] [blame] | 2813 | weak_alias (__pread64, pread64) |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 2814 | weak_alias (__pwrite64, pwrite64) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2815 | weak_alias(__fork, fork) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2816 | weak_alias(__vfork, vfork) |
sewardj | 7f6456d | 2002-05-21 00:51:21 +0000 | [diff] [blame] | 2817 | |
sewardj | f0b0645 | 2002-06-04 08:38:04 +0000 | [diff] [blame] | 2818 | weak_alias (__pthread_kill_other_threads_np, pthread_kill_other_threads_np) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2819 | |
| 2820 | /*--------------------------------------------------*/ |
| 2821 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2822 | weak_alias(pthread_rwlock_rdlock, __pthread_rwlock_rdlock) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2823 | weak_alias(pthread_rwlock_unlock, __pthread_rwlock_unlock) |
sewardj | 262b029 | 2002-05-01 00:03:16 +0000 | [diff] [blame] | 2824 | weak_alias(pthread_rwlock_wrlock, __pthread_rwlock_wrlock) |
sewardj | 060b04f | 2002-04-26 21:01:13 +0000 | [diff] [blame] | 2825 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2826 | weak_alias(pthread_rwlock_destroy, __pthread_rwlock_destroy) |
| 2827 | weak_alias(pthread_rwlock_init, __pthread_rwlock_init) |
| 2828 | weak_alias(pthread_rwlock_tryrdlock, __pthread_rwlock_tryrdlock) |
| 2829 | weak_alias(pthread_rwlock_trywrlock, __pthread_rwlock_trywrlock) |
| 2830 | |
sewardj | 060b04f | 2002-04-26 21:01:13 +0000 | [diff] [blame] | 2831 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2832 | /* I've no idea what these are, but they get called quite a lot. |
| 2833 | Anybody know? */ |
| 2834 | |
| 2835 | #undef _IO_flockfile |
| 2836 | void _IO_flockfile ( _IO_FILE * file ) |
| 2837 | { |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 2838 | pthread_mutex_lock(file->_lock); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2839 | } |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2840 | weak_alias(_IO_flockfile, flockfile); |
| 2841 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2842 | |
| 2843 | #undef _IO_funlockfile |
| 2844 | void _IO_funlockfile ( _IO_FILE * file ) |
| 2845 | { |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 2846 | pthread_mutex_unlock(file->_lock); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2847 | } |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2848 | weak_alias(_IO_funlockfile, funlockfile); |
| 2849 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2850 | |
sewardj | d4f2c71 | 2002-04-30 10:20:10 +0000 | [diff] [blame] | 2851 | /* This doesn't seem to be needed to simulate libpthread.so's external |
| 2852 | interface, but many people complain about its absence. */ |
| 2853 | |
| 2854 | strong_alias(__pthread_mutexattr_settype, __pthread_mutexattr_setkind_np) |
| 2855 | weak_alias(__pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np) |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 2856 | |
| 2857 | |
| 2858 | /*--------------------------------------------------------------------*/ |
| 2859 | /*--- end vg_libpthread.c ---*/ |
| 2860 | /*--------------------------------------------------------------------*/ |