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 |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 79 | int my_do_syscall1 ( int syscallno, int arg1 ); |
| 80 | |
| 81 | static |
sewardj | 9a2224b | 2002-06-19 10:17:40 +0000 | [diff] [blame] | 82 | int my_do_syscall2 ( int syscallno, |
| 83 | int arg1, int arg2 ); |
| 84 | |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 85 | static |
| 86 | int my_do_syscall3 ( int syscallno, |
| 87 | int arg1, int arg2, int arg3 ); |
| 88 | |
| 89 | |
| 90 | #ifdef GLIBC_2_3 |
| 91 | /* kludge by JRS (not from glibc) ... */ |
| 92 | typedef void* __locale_t; |
| 93 | |
| 94 | /* Copied from locale/locale.h in glibc-2.2.93 sources */ |
| 95 | /* This value can be passed to `uselocale' and may be returned by |
| 96 | it. Passing this value to any other function has undefined |
| 97 | behavior. */ |
| 98 | # define LC_GLOBAL_LOCALE ((__locale_t) -1L) |
| 99 | extern __locale_t __uselocale ( __locale_t ); |
| 100 | #endif |
| 101 | |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 102 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 103 | /* --------------------------------------------------------------------- |
| 104 | Helpers. We have to be pretty self-sufficient. |
| 105 | ------------------------------------------------------------------ */ |
| 106 | |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 107 | /* Number of times any given error message is printed. */ |
| 108 | #define N_MOANS 3 |
| 109 | |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 110 | /* Extract from Valgrind the value of VG_(clo_trace_pthread_level). |
| 111 | Returns 0 (none) if not running on Valgrind. */ |
| 112 | static |
| 113 | int get_pt_trace_level ( void ) |
| 114 | { |
| 115 | int res; |
| 116 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 117 | VG_USERREQ__GET_PTHREAD_TRACE_LEVEL, |
| 118 | 0, 0, 0, 0); |
| 119 | return res; |
| 120 | } |
| 121 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 122 | static |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 123 | void my_exit ( int arg ) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 124 | { |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 125 | my_do_syscall1(__NR_exit, arg); |
| 126 | /*NOTREACHED*/ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 127 | } |
| 128 | |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 129 | static |
| 130 | void my_write ( int fd, const void *buf, int count ) |
| 131 | { |
| 132 | my_do_syscall3(__NR_write, fd, (int)buf, count ); |
| 133 | } |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 134 | |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 135 | /* We need this guy -- it's in valgrind.so. */ |
| 136 | extern void VG_(startup) ( void ); |
| 137 | |
| 138 | |
| 139 | /* Just start up Valgrind if it's not already going. VG_(startup)() |
| 140 | detects and ignores second and subsequent calls. */ |
sewardj | 604ec3c | 2002-04-18 22:38:41 +0000 | [diff] [blame] | 141 | static __inline__ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 142 | void ensure_valgrind ( char* caller ) |
| 143 | { |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 144 | VG_(startup)(); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 145 | } |
| 146 | |
sewardj | bea1caa | 2002-05-10 23:20:58 +0000 | [diff] [blame] | 147 | /* While we're at it ... hook our own startup function into this |
| 148 | game. */ |
| 149 | __asm__ ( |
| 150 | ".section .init\n" |
| 151 | "\tcall vgPlain_startup" |
| 152 | ); |
| 153 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 154 | |
| 155 | static |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 156 | __attribute__((noreturn)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 157 | void barf ( char* str ) |
| 158 | { |
| 159 | char buf[100]; |
| 160 | buf[0] = 0; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 161 | strcat(buf, "\nvalgrind's libpthread.so: "); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 162 | strcat(buf, str); |
| 163 | strcat(buf, "\n\n"); |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 164 | my_write(2, buf, strlen(buf)); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 165 | my_exit(1); |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 166 | /* We have to persuade gcc into believing this doesn't return. */ |
| 167 | while (1) { }; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | |
sewardj | 2a3d28c | 2002-04-14 13:27:00 +0000 | [diff] [blame] | 171 | static void ignored ( char* msg ) |
| 172 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 173 | if (get_pt_trace_level() >= 0) { |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 174 | char* ig = "valgrind's libpthread.so: IGNORED call to: "; |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 175 | my_write(2, ig, strlen(ig)); |
| 176 | my_write(2, msg, strlen(msg)); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 177 | ig = "\n"; |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 178 | my_write(2, ig, strlen(ig)); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 179 | } |
sewardj | 2a3d28c | 2002-04-14 13:27:00 +0000 | [diff] [blame] | 180 | } |
| 181 | |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 182 | static void kludged ( char* msg ) |
| 183 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 184 | if (get_pt_trace_level() >= 0) { |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 185 | char* ig = "valgrind's libpthread.so: KLUDGED call to: "; |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 186 | my_write(2, ig, strlen(ig)); |
| 187 | my_write(2, msg, strlen(msg)); |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 188 | ig = "\n"; |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 189 | my_write(2, ig, strlen(ig)); |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 190 | } |
| 191 | } |
| 192 | |
| 193 | static void not_inside ( char* msg ) |
| 194 | { |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 195 | VG_(startup)(); |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 196 | } |
| 197 | |
sewardj | ccef2e6 | 2002-05-29 19:26:32 +0000 | [diff] [blame] | 198 | __attribute__((noreturn)) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 199 | void vgPlain_unimp ( char* what ) |
| 200 | { |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 201 | char* ig = "valgrind's libpthread.so: UNIMPLEMENTED FUNCTION: "; |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 202 | my_write(2, ig, strlen(ig)); |
| 203 | my_write(2, what, strlen(what)); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 204 | ig = "\n"; |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 205 | my_write(2, ig, strlen(ig)); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 206 | barf("Please report this bug to me at: jseward@acm.org"); |
| 207 | } |
| 208 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 209 | |
sewardj | 457cc47 | 2002-06-03 23:13:47 +0000 | [diff] [blame] | 210 | static |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 211 | void my_assert_fail ( Char* expr, Char* file, Int line, Char* fn ) |
| 212 | { |
| 213 | static Bool entered = False; |
| 214 | if (entered) |
| 215 | my_exit(2); |
| 216 | entered = True; |
| 217 | fprintf(stderr, "\n%s: %s:%d (%s): Assertion `%s' failed.\n", |
| 218 | "valgrind", file, line, fn, expr ); |
| 219 | fprintf(stderr, "Please report this bug to me at: %s\n\n", |
| 220 | VG_EMAIL_ADDR); |
| 221 | my_exit(1); |
| 222 | } |
| 223 | |
| 224 | #define MY__STRING(__str) #__str |
| 225 | |
| 226 | #define my_assert(expr) \ |
| 227 | ((void) ((expr) ? 0 : \ |
| 228 | (my_assert_fail (MY__STRING(expr), \ |
| 229 | __FILE__, __LINE__, \ |
| 230 | __PRETTY_FUNCTION__), 0))) |
| 231 | |
| 232 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 233 | /* --------------------------------------------------------------------- |
| 234 | Pass pthread_ calls to Valgrind's request mechanism. |
| 235 | ------------------------------------------------------------------ */ |
| 236 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 237 | #include <errno.h> |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 238 | #include <sys/time.h> /* gettimeofday */ |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 239 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 240 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 241 | /* --------------------------------------------------- |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 242 | Ummm .. |
| 243 | ------------------------------------------------ */ |
| 244 | |
| 245 | static |
| 246 | void pthread_error ( const char* msg ) |
| 247 | { |
| 248 | int res; |
| 249 | VALGRIND_MAGIC_SEQUENCE(res, 0, |
| 250 | VG_USERREQ__PTHREAD_ERROR, |
| 251 | msg, 0, 0, 0); |
| 252 | } |
| 253 | |
| 254 | |
| 255 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 256 | THREAD ATTRIBUTES |
| 257 | ------------------------------------------------ */ |
| 258 | |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 259 | int pthread_attr_init(pthread_attr_t *attr) |
| 260 | { |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 261 | /* Just initialise the fields which we might look at. */ |
| 262 | attr->__detachstate = PTHREAD_CREATE_JOINABLE; |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate) |
| 267 | { |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 268 | if (detachstate != PTHREAD_CREATE_JOINABLE |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 269 | && detachstate != PTHREAD_CREATE_DETACHED) { |
| 270 | pthread_error("pthread_attr_setdetachstate: " |
| 271 | "detachstate is invalid"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 272 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 273 | } |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 274 | attr->__detachstate = detachstate; |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 275 | return 0; |
| 276 | } |
| 277 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 278 | int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate) |
| 279 | { |
| 280 | *detachstate = attr->__detachstate; |
| 281 | return 0; |
| 282 | } |
| 283 | |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 284 | int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit) |
| 285 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 286 | static int moans = N_MOANS; |
| 287 | if (moans-- > 0) |
| 288 | ignored("pthread_attr_setinheritsched"); |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 289 | return 0; |
| 290 | } |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 291 | |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 292 | __attribute__((weak)) |
| 293 | int pthread_attr_setstacksize (pthread_attr_t *__attr, |
| 294 | size_t __stacksize) |
| 295 | { |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 296 | size_t limit; |
sewardj | 3d7c8d6 | 2002-06-04 20:59:16 +0000 | [diff] [blame] | 297 | char buf[1024]; |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 298 | ensure_valgrind("pthread_attr_setstacksize"); |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 299 | limit = VG_PTHREAD_STACK_SIZE - VG_AR_CLIENT_STACKBASE_REDZONE_SZB |
| 300 | - 1000; /* paranoia */ |
| 301 | if (__stacksize < limit) |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 302 | return 0; |
sewardj | 3d7c8d6 | 2002-06-04 20:59:16 +0000 | [diff] [blame] | 303 | snprintf(buf, sizeof(buf), "pthread_attr_setstacksize: " |
| 304 | "requested size %d >= VG_PTHREAD_STACK_SIZE\n " |
| 305 | "edit vg_include.h and rebuild.", __stacksize); |
| 306 | buf[sizeof(buf)-1] = '\0'; /* Make sure it is zero terminated */ |
| 307 | barf(buf); |
sewardj | 0286dd5 | 2002-05-16 20:51:15 +0000 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 311 | /* This is completely bogus. */ |
| 312 | int pthread_attr_getschedparam(const pthread_attr_t *attr, |
| 313 | struct sched_param *param) |
| 314 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 315 | static int moans = N_MOANS; |
| 316 | if (moans-- > 0) |
| 317 | kludged("pthread_attr_getschedparam"); |
sewardj | 3e909ce | 2002-06-03 13:27:15 +0000 | [diff] [blame] | 318 | # ifdef HAVE_SCHED_PRIORITY |
sewardj | 72d5848 | 2002-04-24 02:20:20 +0000 | [diff] [blame] | 319 | if (param) param->sched_priority = 0; /* who knows */ |
| 320 | # else |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 321 | if (param) param->__sched_priority = 0; /* who knows */ |
sewardj | 72d5848 | 2002-04-24 02:20:20 +0000 | [diff] [blame] | 322 | # endif |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 323 | return 0; |
| 324 | } |
| 325 | |
| 326 | int pthread_attr_setschedparam(pthread_attr_t *attr, |
| 327 | const struct sched_param *param) |
| 328 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 329 | static int moans = N_MOANS; |
| 330 | if (moans-- > 0) |
| 331 | ignored("pthread_attr_setschedparam"); |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 332 | return 0; |
| 333 | } |
| 334 | |
| 335 | int pthread_attr_destroy(pthread_attr_t *attr) |
| 336 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 337 | static int moans = N_MOANS; |
| 338 | if (moans-- > 0) |
| 339 | ignored("pthread_attr_destroy"); |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 340 | return 0; |
| 341 | } |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 342 | |
sewardj | 0d84423 | 2002-06-02 09:29:31 +0000 | [diff] [blame] | 343 | /* These are no-ops, as with LinuxThreads. */ |
| 344 | int pthread_attr_setscope ( pthread_attr_t *attr, int scope ) |
| 345 | { |
| 346 | ensure_valgrind("pthread_attr_setscope"); |
| 347 | if (scope == PTHREAD_SCOPE_SYSTEM) |
| 348 | return 0; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 349 | pthread_error("pthread_attr_setscope: " |
| 350 | "invalid or unsupported scope"); |
sewardj | 0d84423 | 2002-06-02 09:29:31 +0000 | [diff] [blame] | 351 | if (scope == PTHREAD_SCOPE_PROCESS) |
| 352 | return ENOTSUP; |
| 353 | return EINVAL; |
| 354 | } |
| 355 | |
| 356 | int pthread_attr_getscope ( const pthread_attr_t *attr, int *scope ) |
| 357 | { |
| 358 | ensure_valgrind("pthread_attr_setscope"); |
| 359 | if (scope) |
| 360 | *scope = PTHREAD_SCOPE_SYSTEM; |
| 361 | return 0; |
| 362 | } |
| 363 | |
sewardj | 64039bb | 2002-06-03 00:58:18 +0000 | [diff] [blame] | 364 | |
| 365 | /* Pretty bogus. Avoid if possible. */ |
| 366 | int pthread_getattr_np (pthread_t thread, pthread_attr_t *attr) |
| 367 | { |
| 368 | int detached; |
| 369 | size_t limit; |
| 370 | ensure_valgrind("pthread_getattr_np"); |
| 371 | kludged("pthread_getattr_np"); |
| 372 | limit = VG_PTHREAD_STACK_SIZE - VG_AR_CLIENT_STACKBASE_REDZONE_SZB |
| 373 | - 1000; /* paranoia */ |
| 374 | attr->__detachstate = PTHREAD_CREATE_JOINABLE; |
| 375 | attr->__schedpolicy = SCHED_OTHER; |
| 376 | attr->__schedparam.sched_priority = 0; |
| 377 | attr->__inheritsched = PTHREAD_EXPLICIT_SCHED; |
| 378 | attr->__scope = PTHREAD_SCOPE_SYSTEM; |
| 379 | attr->__guardsize = VKI_BYTES_PER_PAGE; |
| 380 | attr->__stackaddr = NULL; |
| 381 | attr->__stackaddr_set = 0; |
| 382 | attr->__stacksize = limit; |
| 383 | VALGRIND_MAGIC_SEQUENCE(detached, (-1) /* default */, |
| 384 | VG_USERREQ__SET_OR_GET_DETACH, |
| 385 | 2 /* get */, thread, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 386 | my_assert(detached == 0 || detached == 1); |
sewardj | 64039bb | 2002-06-03 00:58:18 +0000 | [diff] [blame] | 387 | if (detached) |
| 388 | attr->__detachstate = PTHREAD_CREATE_DETACHED; |
| 389 | return 0; |
| 390 | } |
| 391 | |
| 392 | |
| 393 | /* Bogus ... */ |
| 394 | int pthread_attr_getstackaddr ( const pthread_attr_t * attr, |
| 395 | void ** stackaddr ) |
| 396 | { |
| 397 | ensure_valgrind("pthread_attr_getstackaddr"); |
| 398 | kludged("pthread_attr_getstackaddr"); |
| 399 | if (stackaddr) |
| 400 | *stackaddr = NULL; |
| 401 | return 0; |
| 402 | } |
| 403 | |
| 404 | /* Not bogus (!) */ |
| 405 | int pthread_attr_getstacksize ( const pthread_attr_t * _attr, |
| 406 | size_t * __stacksize ) |
| 407 | { |
| 408 | size_t limit; |
| 409 | ensure_valgrind("pthread_attr_getstacksize"); |
| 410 | limit = VG_PTHREAD_STACK_SIZE - VG_AR_CLIENT_STACKBASE_REDZONE_SZB |
| 411 | - 1000; /* paranoia */ |
| 412 | if (__stacksize) |
| 413 | *__stacksize = limit; |
| 414 | return 0; |
| 415 | } |
| 416 | |
sewardj | a3be12f | 2002-06-17 12:19:44 +0000 | [diff] [blame] | 417 | int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy) |
| 418 | { |
| 419 | if (policy != SCHED_OTHER && policy != SCHED_FIFO && policy != SCHED_RR) |
| 420 | return EINVAL; |
| 421 | attr->__schedpolicy = policy; |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy) |
| 426 | { |
| 427 | *policy = attr->__schedpolicy; |
| 428 | return 0; |
| 429 | } |
| 430 | |
| 431 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 432 | /* --------------------------------------------------- |
| 433 | Helper functions for running a thread |
| 434 | and for clearing up afterwards. |
| 435 | ------------------------------------------------ */ |
| 436 | |
| 437 | /* All exiting threads eventually pass through here, bearing the |
| 438 | return value, or PTHREAD_CANCELED, in ret_val. */ |
| 439 | static |
| 440 | __attribute__((noreturn)) |
| 441 | void thread_exit_wrapper ( void* ret_val ) |
| 442 | { |
sewardj | 870497a | 2002-05-29 01:06:47 +0000 | [diff] [blame] | 443 | int detached, res; |
| 444 | CleanupEntry cu; |
| 445 | pthread_key_t key; |
| 446 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 447 | /* Run this thread's cleanup handlers. */ |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 448 | while (1) { |
| 449 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 450 | VG_USERREQ__CLEANUP_POP, |
| 451 | &cu, 0, 0, 0); |
| 452 | if (res == -1) break; /* stack empty */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 453 | my_assert(res == 0); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 454 | if (0) printf("running exit cleanup handler"); |
| 455 | cu.fn ( cu.arg ); |
| 456 | } |
| 457 | |
sewardj | 870497a | 2002-05-29 01:06:47 +0000 | [diff] [blame] | 458 | /* Run this thread's key finalizers. Really this should be run |
| 459 | PTHREAD_DESTRUCTOR_ITERATIONS times. */ |
| 460 | for (key = 0; key < VG_N_THREAD_KEYS; key++) { |
| 461 | VALGRIND_MAGIC_SEQUENCE(res, (-2) /* default */, |
| 462 | VG_USERREQ__GET_KEY_D_AND_S, |
| 463 | key, &cu, 0, 0 ); |
| 464 | if (res == 0) { |
| 465 | /* valid key */ |
| 466 | if (cu.fn && cu.arg) |
| 467 | cu.fn /* destructor for key */ |
| 468 | ( cu.arg /* specific for key for this thread */ ); |
| 469 | continue; |
| 470 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 471 | my_assert(res == -1); |
sewardj | 870497a | 2002-05-29 01:06:47 +0000 | [diff] [blame] | 472 | } |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 473 | |
| 474 | /* Decide on my final disposition. */ |
| 475 | VALGRIND_MAGIC_SEQUENCE(detached, (-1) /* default */, |
| 476 | VG_USERREQ__SET_OR_GET_DETACH, |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 477 | 2 /* get */, pthread_self(), 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 478 | my_assert(detached == 0 || detached == 1); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 479 | |
| 480 | if (detached) { |
| 481 | /* Detached; I just quit right now. */ |
| 482 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 483 | VG_USERREQ__QUIT, 0, 0, 0, 0); |
| 484 | } else { |
| 485 | /* Not detached; so I wait for a joiner. */ |
| 486 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 487 | VG_USERREQ__WAIT_JOINER, ret_val, 0, 0, 0); |
| 488 | } |
| 489 | /* NOTREACHED */ |
| 490 | barf("thread_exit_wrapper: still alive?!"); |
| 491 | } |
| 492 | |
| 493 | |
| 494 | /* This function is a wrapper function for running a thread. It runs |
| 495 | the root function specified in pthread_create, and then, should the |
| 496 | root function return a value, it arranges to run the thread's |
| 497 | cleanup handlers and exit correctly. */ |
| 498 | |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 499 | /* Struct used to convey info from pthread_create to thread_wrapper. |
| 500 | Must be careful not to pass to the child thread any pointers to |
| 501 | objects which might be on the parent's stack. */ |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 502 | typedef |
| 503 | struct { |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 504 | int attr__detachstate; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 505 | void* (*root_fn) ( void* ); |
| 506 | void* arg; |
| 507 | } |
| 508 | NewThreadInfo; |
| 509 | |
| 510 | |
| 511 | /* This is passed to the VG_USERREQ__APPLY_IN_NEW_THREAD and so must |
| 512 | not return. Note that this runs in the new thread, not the |
| 513 | parent. */ |
| 514 | static |
| 515 | __attribute__((noreturn)) |
| 516 | void thread_wrapper ( NewThreadInfo* info ) |
| 517 | { |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 518 | int res; |
| 519 | int attr__detachstate; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 520 | void* (*root_fn) ( void* ); |
| 521 | void* arg; |
| 522 | void* ret_val; |
| 523 | |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 524 | attr__detachstate = info->attr__detachstate; |
| 525 | root_fn = info->root_fn; |
| 526 | arg = info->arg; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 527 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 528 | /* Free up the arg block that pthread_create malloced. */ |
| 529 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 530 | VG_USERREQ__FREE, info, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 531 | my_assert(res == 0); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 532 | |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 533 | /* Minimally observe the attributes supplied. */ |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 534 | if (attr__detachstate != PTHREAD_CREATE_DETACHED |
| 535 | && attr__detachstate != PTHREAD_CREATE_JOINABLE) |
| 536 | pthread_error("thread_wrapper: invalid attr->__detachstate"); |
| 537 | if (attr__detachstate == PTHREAD_CREATE_DETACHED) |
| 538 | pthread_detach(pthread_self()); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 539 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 540 | /* The root function might not return. But if it does we simply |
| 541 | move along to thread_exit_wrapper. All other ways out for the |
| 542 | thread (cancellation, or calling pthread_exit) lead there |
| 543 | too. */ |
| 544 | ret_val = root_fn(arg); |
| 545 | thread_exit_wrapper(ret_val); |
| 546 | /* NOTREACHED */ |
| 547 | } |
| 548 | |
| 549 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 550 | /* --------------------------------------------------- |
| 551 | THREADs |
| 552 | ------------------------------------------------ */ |
| 553 | |
sewardj | ff42d1d | 2002-05-22 13:17:31 +0000 | [diff] [blame] | 554 | __attribute__((weak)) |
| 555 | int pthread_yield ( void ) |
| 556 | { |
| 557 | int res; |
| 558 | ensure_valgrind("pthread_yield"); |
| 559 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 560 | VG_USERREQ__PTHREAD_YIELD, 0, 0, 0, 0); |
| 561 | return 0; |
| 562 | } |
| 563 | |
| 564 | |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 565 | int pthread_equal(pthread_t thread1, pthread_t thread2) |
| 566 | { |
| 567 | return thread1 == thread2 ? 1 : 0; |
| 568 | } |
| 569 | |
| 570 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 571 | /* Bundle up the args into a malloc'd block and create a new thread |
| 572 | consisting of thread_wrapper() applied to said malloc'd block. */ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 573 | int |
sewardj | 1462c8b | 2002-07-24 09:41:52 +0000 | [diff] [blame] | 574 | pthread_create (pthread_t *__restrict __thredd, |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 575 | __const pthread_attr_t *__restrict __attr, |
| 576 | void *(*__start_routine) (void *), |
| 577 | void *__restrict __arg) |
| 578 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 579 | int tid_child; |
| 580 | NewThreadInfo* info; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 581 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 582 | ensure_valgrind("pthread_create"); |
| 583 | |
| 584 | /* Allocate space for the arg block. thread_wrapper will free |
| 585 | it. */ |
| 586 | VALGRIND_MAGIC_SEQUENCE(info, NULL /* default */, |
| 587 | VG_USERREQ__MALLOC, |
| 588 | sizeof(NewThreadInfo), 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 589 | my_assert(info != NULL); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 590 | |
sewardj | 728a527 | 2002-06-20 10:25:37 +0000 | [diff] [blame] | 591 | if (__attr) |
| 592 | info->attr__detachstate = __attr->__detachstate; |
| 593 | else |
| 594 | info->attr__detachstate = PTHREAD_CREATE_JOINABLE; |
| 595 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 596 | info->root_fn = __start_routine; |
| 597 | info->arg = __arg; |
| 598 | VALGRIND_MAGIC_SEQUENCE(tid_child, VG_INVALID_THREADID /* default */, |
| 599 | VG_USERREQ__APPLY_IN_NEW_THREAD, |
| 600 | &thread_wrapper, info, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 601 | my_assert(tid_child != VG_INVALID_THREADID); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 602 | |
sewardj | 1462c8b | 2002-07-24 09:41:52 +0000 | [diff] [blame] | 603 | if (__thredd) |
| 604 | *__thredd = tid_child; |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 605 | return 0; /* success */ |
| 606 | } |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 607 | |
| 608 | |
| 609 | int |
| 610 | pthread_join (pthread_t __th, void **__thread_return) |
| 611 | { |
| 612 | int res; |
| 613 | ensure_valgrind("pthread_join"); |
| 614 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 615 | VG_USERREQ__PTHREAD_JOIN, |
| 616 | __th, __thread_return, 0, 0); |
| 617 | return res; |
| 618 | } |
| 619 | |
| 620 | |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 621 | void pthread_exit(void *retval) |
| 622 | { |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 623 | ensure_valgrind("pthread_exit"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 624 | /* Simple! */ |
| 625 | thread_exit_wrapper(retval); |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 626 | } |
| 627 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 628 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 629 | pthread_t pthread_self(void) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 630 | { |
| 631 | int tid; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 632 | ensure_valgrind("pthread_self"); |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 633 | VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 634 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 635 | 0, 0, 0, 0); |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 636 | if (tid < 1 || tid >= VG_N_THREADS) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 637 | barf("pthread_self: invalid ThreadId"); |
| 638 | return tid; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 639 | } |
| 640 | |
| 641 | |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 642 | int pthread_detach(pthread_t th) |
| 643 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 644 | int res; |
| 645 | ensure_valgrind("pthread_detach"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 646 | /* First we enquire as to the current detach state. */ |
| 647 | VALGRIND_MAGIC_SEQUENCE(res, (-2) /* default */, |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 648 | VG_USERREQ__SET_OR_GET_DETACH, |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 649 | 2 /* get */, th, 0, 0); |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 650 | if (res == -1) { |
| 651 | /* not found */ |
| 652 | pthread_error("pthread_detach: " |
| 653 | "invalid target thread"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 654 | return ESRCH; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 655 | } |
| 656 | if (res == 1) { |
| 657 | /* already detached */ |
| 658 | pthread_error("pthread_detach: " |
| 659 | "target thread is already detached"); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 660 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 661 | } |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 662 | if (res == 0) { |
| 663 | VALGRIND_MAGIC_SEQUENCE(res, (-2) /* default */, |
| 664 | VG_USERREQ__SET_OR_GET_DETACH, |
| 665 | 1 /* set */, th, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 666 | my_assert(res == 0); |
sewardj | 7989d0c | 2002-05-28 11:00:01 +0000 | [diff] [blame] | 667 | return 0; |
| 668 | } |
| 669 | barf("pthread_detach"); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 670 | } |
| 671 | |
| 672 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 673 | /* --------------------------------------------------- |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 674 | CLEANUP STACKS |
| 675 | ------------------------------------------------ */ |
| 676 | |
| 677 | void _pthread_cleanup_push (struct _pthread_cleanup_buffer *__buffer, |
| 678 | void (*__routine) (void *), |
| 679 | void *__arg) |
| 680 | { |
| 681 | int res; |
| 682 | CleanupEntry cu; |
| 683 | ensure_valgrind("_pthread_cleanup_push"); |
| 684 | cu.fn = __routine; |
| 685 | cu.arg = __arg; |
| 686 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 687 | VG_USERREQ__CLEANUP_PUSH, |
| 688 | &cu, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 689 | my_assert(res == 0); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 690 | } |
| 691 | |
| 692 | |
| 693 | void _pthread_cleanup_push_defer (struct _pthread_cleanup_buffer *__buffer, |
| 694 | void (*__routine) (void *), |
| 695 | void *__arg) |
| 696 | { |
| 697 | /* As _pthread_cleanup_push, but first save the thread's original |
| 698 | cancellation type in __buffer and set it to Deferred. */ |
| 699 | int orig_ctype; |
| 700 | ensure_valgrind("_pthread_cleanup_push_defer"); |
| 701 | /* Set to Deferred, and put the old cancellation type in res. */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 702 | my_assert(-1 != PTHREAD_CANCEL_DEFERRED); |
| 703 | my_assert(-1 != PTHREAD_CANCEL_ASYNCHRONOUS); |
| 704 | my_assert(sizeof(struct _pthread_cleanup_buffer) >= sizeof(int)); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 705 | VALGRIND_MAGIC_SEQUENCE(orig_ctype, (-1) /* default */, |
| 706 | VG_USERREQ__SET_CANCELTYPE, |
| 707 | PTHREAD_CANCEL_DEFERRED, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 708 | my_assert(orig_ctype != -1); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 709 | *((int*)(__buffer)) = orig_ctype; |
| 710 | /* Now push the cleanup. */ |
| 711 | _pthread_cleanup_push(NULL, __routine, __arg); |
| 712 | } |
| 713 | |
| 714 | |
| 715 | void _pthread_cleanup_pop (struct _pthread_cleanup_buffer *__buffer, |
| 716 | int __execute) |
| 717 | { |
| 718 | int res; |
| 719 | CleanupEntry cu; |
| 720 | ensure_valgrind("_pthread_cleanup_push"); |
| 721 | cu.fn = cu.arg = NULL; /* paranoia */ |
| 722 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 723 | VG_USERREQ__CLEANUP_POP, |
| 724 | &cu, 0, 0, 0); |
| 725 | if (res == 0) { |
| 726 | /* pop succeeded */ |
| 727 | if (__execute) { |
| 728 | cu.fn ( cu.arg ); |
| 729 | } |
| 730 | return; |
| 731 | } |
| 732 | if (res == -1) { |
| 733 | /* stack underflow */ |
| 734 | return; |
| 735 | } |
| 736 | barf("_pthread_cleanup_pop"); |
| 737 | } |
| 738 | |
| 739 | |
| 740 | void _pthread_cleanup_pop_restore (struct _pthread_cleanup_buffer *__buffer, |
| 741 | int __execute) |
| 742 | { |
| 743 | int orig_ctype, fake_ctype; |
| 744 | /* As _pthread_cleanup_pop, but after popping/running the handler, |
| 745 | restore the thread's original cancellation type from the first |
| 746 | word of __buffer. */ |
| 747 | _pthread_cleanup_pop(NULL, __execute); |
| 748 | orig_ctype = *((int*)(__buffer)); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 749 | my_assert(orig_ctype == PTHREAD_CANCEL_DEFERRED |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 750 | || orig_ctype == PTHREAD_CANCEL_ASYNCHRONOUS); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 751 | my_assert(-1 != PTHREAD_CANCEL_DEFERRED); |
| 752 | my_assert(-1 != PTHREAD_CANCEL_ASYNCHRONOUS); |
| 753 | my_assert(sizeof(struct _pthread_cleanup_buffer) >= sizeof(int)); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 754 | VALGRIND_MAGIC_SEQUENCE(fake_ctype, (-1) /* default */, |
| 755 | VG_USERREQ__SET_CANCELTYPE, |
| 756 | orig_ctype, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 757 | my_assert(fake_ctype == PTHREAD_CANCEL_DEFERRED); |
sewardj | 8ad94e1 | 2002-05-29 00:10:20 +0000 | [diff] [blame] | 758 | } |
| 759 | |
| 760 | |
| 761 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 762 | MUTEX ATTRIBUTES |
| 763 | ------------------------------------------------ */ |
| 764 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 765 | int __pthread_mutexattr_init(pthread_mutexattr_t *attr) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 766 | { |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 767 | attr->__mutexkind = PTHREAD_MUTEX_ERRORCHECK_NP; |
sewardj | 8937c81 | 2002-04-12 20:12:20 +0000 | [diff] [blame] | 768 | return 0; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 769 | } |
| 770 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 771 | int __pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type) |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 772 | { |
| 773 | switch (type) { |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 774 | # ifndef GLIBC_2_1 |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 775 | case PTHREAD_MUTEX_TIMED_NP: |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 776 | case PTHREAD_MUTEX_ADAPTIVE_NP: |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 777 | # endif |
sewardj | a1679dd | 2002-05-10 22:31:40 +0000 | [diff] [blame] | 778 | # ifdef GLIBC_2_1 |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 779 | case PTHREAD_MUTEX_FAST_NP: |
sewardj | a1679dd | 2002-05-10 22:31:40 +0000 | [diff] [blame] | 780 | # endif |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 781 | case PTHREAD_MUTEX_RECURSIVE_NP: |
| 782 | case PTHREAD_MUTEX_ERRORCHECK_NP: |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 783 | attr->__mutexkind = type; |
| 784 | return 0; |
| 785 | default: |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 786 | pthread_error("pthread_mutexattr_settype: " |
| 787 | "invalid type"); |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 788 | return EINVAL; |
| 789 | } |
| 790 | } |
| 791 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 792 | int __pthread_mutexattr_destroy(pthread_mutexattr_t *attr) |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 793 | { |
| 794 | return 0; |
| 795 | } |
| 796 | |
| 797 | |
| 798 | /* --------------------------------------------------- |
| 799 | MUTEXes |
| 800 | ------------------------------------------------ */ |
| 801 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 802 | int __pthread_mutex_init(pthread_mutex_t *mutex, |
| 803 | const pthread_mutexattr_t *mutexattr) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 804 | { |
sewardj | 604ec3c | 2002-04-18 22:38:41 +0000 | [diff] [blame] | 805 | mutex->__m_count = 0; |
| 806 | mutex->__m_owner = (_pthread_descr)VG_INVALID_THREADID; |
| 807 | mutex->__m_kind = PTHREAD_MUTEX_ERRORCHECK_NP; |
| 808 | if (mutexattr) |
| 809 | mutex->__m_kind = mutexattr->__mutexkind; |
| 810 | return 0; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 811 | } |
| 812 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 813 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 814 | int __pthread_mutex_lock(pthread_mutex_t *mutex) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 815 | { |
| 816 | int res; |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 817 | static int moans = N_MOANS; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 818 | if (RUNNING_ON_VALGRIND) { |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 819 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 820 | VG_USERREQ__PTHREAD_MUTEX_LOCK, |
| 821 | mutex, 0, 0, 0); |
| 822 | return res; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 823 | } else { |
| 824 | if (moans-- > 0) |
| 825 | not_inside("pthread_mutex_lock"); |
| 826 | return 0; /* success */ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 827 | } |
| 828 | } |
| 829 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 830 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 831 | int __pthread_mutex_trylock(pthread_mutex_t *mutex) |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 832 | { |
| 833 | int res; |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 834 | static int moans = N_MOANS; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 835 | if (RUNNING_ON_VALGRIND) { |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 836 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 837 | VG_USERREQ__PTHREAD_MUTEX_TRYLOCK, |
| 838 | mutex, 0, 0, 0); |
| 839 | return res; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 840 | } else { |
| 841 | if (moans-- > 0) |
| 842 | not_inside("pthread_mutex_trylock"); |
| 843 | return 0; |
sewardj | 30671ff | 2002-04-21 00:13:57 +0000 | [diff] [blame] | 844 | } |
| 845 | } |
| 846 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 847 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 848 | int __pthread_mutex_unlock(pthread_mutex_t *mutex) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 849 | { |
| 850 | int res; |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 851 | static int moans = N_MOANS; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 852 | if (RUNNING_ON_VALGRIND) { |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 853 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 854 | VG_USERREQ__PTHREAD_MUTEX_UNLOCK, |
| 855 | mutex, 0, 0, 0); |
| 856 | return res; |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 857 | } else { |
| 858 | if (moans-- > 0) |
| 859 | not_inside("pthread_mutex_unlock"); |
| 860 | return 0; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 861 | } |
| 862 | } |
| 863 | |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 864 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 865 | int __pthread_mutex_destroy(pthread_mutex_t *mutex) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 866 | { |
sewardj | 604ec3c | 2002-04-18 22:38:41 +0000 | [diff] [blame] | 867 | /* Valgrind doesn't hold any resources on behalf of the mutex, so no |
| 868 | need to involve it. */ |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 869 | if (mutex->__m_count > 0) { |
| 870 | pthread_error("pthread_mutex_destroy: " |
| 871 | "mutex is still in use"); |
sewardj | 604ec3c | 2002-04-18 22:38:41 +0000 | [diff] [blame] | 872 | return EBUSY; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 873 | } |
| 874 | mutex->__m_count = 0; |
| 875 | mutex->__m_owner = (_pthread_descr)VG_INVALID_THREADID; |
| 876 | mutex->__m_kind = PTHREAD_MUTEX_ERRORCHECK_NP; |
| 877 | return 0; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 878 | } |
| 879 | |
| 880 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 881 | /* --------------------------------------------------- |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 882 | CONDITION VARIABLES |
| 883 | ------------------------------------------------ */ |
| 884 | |
| 885 | /* LinuxThreads supports no attributes for conditions. Hence ... */ |
| 886 | |
| 887 | int pthread_condattr_init(pthread_condattr_t *attr) |
| 888 | { |
| 889 | return 0; |
| 890 | } |
| 891 | |
sewardj | 0738a59 | 2002-04-20 13:59:33 +0000 | [diff] [blame] | 892 | int pthread_condattr_destroy(pthread_condattr_t *attr) |
| 893 | { |
| 894 | return 0; |
| 895 | } |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 896 | |
| 897 | int pthread_cond_init( pthread_cond_t *cond, |
| 898 | const pthread_condattr_t *cond_attr) |
| 899 | { |
| 900 | cond->__c_waiting = (_pthread_descr)VG_INVALID_THREADID; |
| 901 | return 0; |
| 902 | } |
| 903 | |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 904 | int pthread_cond_destroy(pthread_cond_t *cond) |
| 905 | { |
| 906 | /* should check that no threads are waiting on this CV */ |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 907 | static int moans = N_MOANS; |
| 908 | if (moans-- > 0) |
| 909 | kludged("pthread_cond_destroy"); |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 910 | return 0; |
| 911 | } |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 912 | |
| 913 | /* --------------------------------------------------- |
| 914 | SCHEDULING |
| 915 | ------------------------------------------------ */ |
| 916 | |
| 917 | /* This is completely bogus. */ |
| 918 | int pthread_getschedparam(pthread_t target_thread, |
| 919 | int *policy, |
| 920 | 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 | kludged("pthread_getschedparam"); |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 925 | if (policy) *policy = SCHED_OTHER; |
sewardj | 3e909ce | 2002-06-03 13:27:15 +0000 | [diff] [blame] | 926 | # ifdef HAVE_SCHED_PRIORITY |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 927 | if (param) param->sched_priority = 0; /* who knows */ |
| 928 | # else |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 929 | if (param) param->__sched_priority = 0; /* who knows */ |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 930 | # endif |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 931 | return 0; |
| 932 | } |
| 933 | |
| 934 | int pthread_setschedparam(pthread_t target_thread, |
| 935 | int policy, |
| 936 | const struct sched_param *param) |
| 937 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 938 | static int moans = N_MOANS; |
| 939 | if (moans-- > 0) |
| 940 | ignored("pthread_setschedparam"); |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 941 | return 0; |
| 942 | } |
| 943 | |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 944 | int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex) |
| 945 | { |
| 946 | int res; |
| 947 | ensure_valgrind("pthread_cond_wait"); |
| 948 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 949 | VG_USERREQ__PTHREAD_COND_WAIT, |
| 950 | cond, mutex, 0, 0); |
| 951 | return res; |
| 952 | } |
| 953 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 954 | int pthread_cond_timedwait ( pthread_cond_t *cond, |
| 955 | pthread_mutex_t *mutex, |
| 956 | const struct timespec *abstime ) |
| 957 | { |
| 958 | int res; |
| 959 | unsigned int ms_now, ms_end; |
| 960 | struct timeval timeval_now; |
| 961 | unsigned long long int ull_ms_now_after_1970; |
| 962 | unsigned long long int ull_ms_end_after_1970; |
| 963 | |
| 964 | ensure_valgrind("pthread_cond_timedwait"); |
| 965 | VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| 966 | VG_USERREQ__READ_MILLISECOND_TIMER, |
| 967 | 0, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 968 | my_assert(ms_now != 0xFFFFFFFF); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 969 | res = gettimeofday(&timeval_now, NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 970 | my_assert(res == 0); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 971 | |
| 972 | ull_ms_now_after_1970 |
| 973 | = 1000ULL * ((unsigned long long int)(timeval_now.tv_sec)) |
| 974 | + ((unsigned long long int)(timeval_now.tv_usec / 1000000)); |
| 975 | ull_ms_end_after_1970 |
| 976 | = 1000ULL * ((unsigned long long int)(abstime->tv_sec)) |
| 977 | + ((unsigned long long int)(abstime->tv_nsec / 1000000)); |
sewardj | d8e919e | 2002-05-29 20:13:53 +0000 | [diff] [blame] | 978 | if (ull_ms_end_after_1970 < ull_ms_now_after_1970) |
| 979 | ull_ms_end_after_1970 = ull_ms_now_after_1970; |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 980 | ms_end |
| 981 | = ms_now + (unsigned int)(ull_ms_end_after_1970 - ull_ms_now_after_1970); |
| 982 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 983 | VG_USERREQ__PTHREAD_COND_TIMEDWAIT, |
| 984 | cond, mutex, ms_end, 0); |
| 985 | return res; |
| 986 | } |
| 987 | |
| 988 | |
sewardj | 3b5d886 | 2002-04-20 13:53:23 +0000 | [diff] [blame] | 989 | int pthread_cond_signal(pthread_cond_t *cond) |
| 990 | { |
| 991 | int res; |
| 992 | ensure_valgrind("pthread_cond_signal"); |
| 993 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 994 | VG_USERREQ__PTHREAD_COND_SIGNAL, |
| 995 | cond, 0, 0, 0); |
| 996 | return res; |
| 997 | } |
| 998 | |
| 999 | int pthread_cond_broadcast(pthread_cond_t *cond) |
| 1000 | { |
| 1001 | int res; |
| 1002 | ensure_valgrind("pthread_cond_broadcast"); |
| 1003 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1004 | VG_USERREQ__PTHREAD_COND_BROADCAST, |
| 1005 | cond, 0, 0, 0); |
| 1006 | return res; |
| 1007 | } |
| 1008 | |
sewardj | 6072c36 | 2002-04-19 14:40:57 +0000 | [diff] [blame] | 1009 | |
| 1010 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1011 | CANCELLATION |
| 1012 | ------------------------------------------------ */ |
| 1013 | |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1014 | int pthread_setcancelstate(int state, int *oldstate) |
| 1015 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1016 | int res; |
| 1017 | ensure_valgrind("pthread_setcancelstate"); |
| 1018 | if (state != PTHREAD_CANCEL_ENABLE |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1019 | && state != PTHREAD_CANCEL_DISABLE) { |
| 1020 | pthread_error("pthread_setcancelstate: " |
| 1021 | "invalid state"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1022 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1023 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1024 | my_assert(-1 != PTHREAD_CANCEL_ENABLE); |
| 1025 | my_assert(-1 != PTHREAD_CANCEL_DISABLE); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1026 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1027 | VG_USERREQ__SET_CANCELSTATE, |
| 1028 | state, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1029 | my_assert(res != -1); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1030 | if (oldstate) |
| 1031 | *oldstate = res; |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1032 | return 0; |
| 1033 | } |
| 1034 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1035 | int pthread_setcanceltype(int type, int *oldtype) |
| 1036 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1037 | int res; |
| 1038 | ensure_valgrind("pthread_setcanceltype"); |
| 1039 | if (type != PTHREAD_CANCEL_DEFERRED |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1040 | && type != PTHREAD_CANCEL_ASYNCHRONOUS) { |
| 1041 | pthread_error("pthread_setcanceltype: " |
| 1042 | "invalid type"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1043 | return EINVAL; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1044 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1045 | my_assert(-1 != PTHREAD_CANCEL_DEFERRED); |
| 1046 | my_assert(-1 != PTHREAD_CANCEL_ASYNCHRONOUS); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1047 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1048 | VG_USERREQ__SET_CANCELTYPE, |
| 1049 | type, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1050 | my_assert(res != -1); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1051 | if (oldtype) |
| 1052 | *oldtype = res; |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1053 | return 0; |
| 1054 | } |
| 1055 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1056 | int pthread_cancel(pthread_t thread) |
| 1057 | { |
| 1058 | int res; |
| 1059 | ensure_valgrind("pthread_cancel"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1060 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1061 | VG_USERREQ__SET_CANCELPEND, |
| 1062 | thread, &thread_exit_wrapper, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1063 | my_assert(res != -1); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1064 | return res; |
| 1065 | } |
| 1066 | |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1067 | static __inline__ |
| 1068 | void __my_pthread_testcancel(void) |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1069 | { |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1070 | int res; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1071 | ensure_valgrind("__my_pthread_testcancel"); |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1072 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1073 | VG_USERREQ__TESTCANCEL, |
| 1074 | 0, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1075 | my_assert(res == 0); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1076 | } |
| 1077 | |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1078 | void pthread_testcancel ( void ) |
| 1079 | { |
| 1080 | __my_pthread_testcancel(); |
| 1081 | } |
| 1082 | |
sewardj | 20917d8 | 2002-05-28 01:36:45 +0000 | [diff] [blame] | 1083 | |
sewardj | ef037c7 | 2002-05-30 00:40:03 +0000 | [diff] [blame] | 1084 | /* Not really sure what this is for. I suspect for doing the POSIX |
| 1085 | requirements for fork() and exec(). We do this internally anyway |
| 1086 | whenever those syscalls are observed, so this could be superfluous, |
| 1087 | but hey ... |
| 1088 | */ |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1089 | void __pthread_kill_other_threads_np ( void ) |
| 1090 | { |
sewardj | ef037c7 | 2002-05-30 00:40:03 +0000 | [diff] [blame] | 1091 | int res; |
| 1092 | ensure_valgrind("__pthread_kill_other_threads_np"); |
| 1093 | VALGRIND_MAGIC_SEQUENCE(res, (-1) /* default */, |
| 1094 | VG_USERREQ__NUKE_OTHER_THREADS, |
| 1095 | 0, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 1096 | my_assert(res == 0); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1097 | } |
| 1098 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1099 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1100 | /* --------------------------------------------------- |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1101 | SIGNALS |
| 1102 | ------------------------------------------------ */ |
| 1103 | |
| 1104 | #include <signal.h> |
| 1105 | |
| 1106 | int pthread_sigmask(int how, const sigset_t *newmask, |
| 1107 | sigset_t *oldmask) |
| 1108 | { |
| 1109 | int res; |
| 1110 | |
| 1111 | /* A bit subtle, because the scheduler expects newmask and oldmask |
| 1112 | to be vki_sigset_t* rather than sigset_t*, and the two are |
| 1113 | different. Fortunately the first 64 bits of a sigset_t are |
| 1114 | exactly a vki_sigset_t, so we just pass the pointers through |
| 1115 | unmodified. Haaaack! |
| 1116 | |
| 1117 | Also mash the how value so that the SIG_ constants from glibc |
sewardj | 018f762 | 2002-05-15 21:13:39 +0000 | [diff] [blame] | 1118 | constants to VKI_ constants, so that the former do not have to |
| 1119 | be included into vg_scheduler.c. */ |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1120 | |
| 1121 | ensure_valgrind("pthread_sigmask"); |
| 1122 | |
| 1123 | switch (how) { |
sewardj | 018f762 | 2002-05-15 21:13:39 +0000 | [diff] [blame] | 1124 | case SIG_SETMASK: how = VKI_SIG_SETMASK; break; |
| 1125 | case SIG_BLOCK: how = VKI_SIG_BLOCK; break; |
| 1126 | case SIG_UNBLOCK: how = VKI_SIG_UNBLOCK; break; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1127 | default: pthread_error("pthread_sigmask: invalid how"); |
| 1128 | return EINVAL; |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1129 | } |
| 1130 | |
| 1131 | /* Crude check */ |
| 1132 | if (newmask == NULL) |
| 1133 | return EFAULT; |
| 1134 | |
| 1135 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1136 | VG_USERREQ__PTHREAD_SIGMASK, |
| 1137 | how, newmask, oldmask, 0); |
| 1138 | |
| 1139 | /* The scheduler tells us of any memory violations. */ |
| 1140 | return res == 0 ? 0 : EFAULT; |
| 1141 | } |
| 1142 | |
| 1143 | |
| 1144 | int sigwait ( const sigset_t* set, int* sig ) |
| 1145 | { |
| 1146 | int res; |
| 1147 | ensure_valgrind("sigwait"); |
| 1148 | /* As with pthread_sigmask we deliberately confuse sigset_t with |
| 1149 | vki_ksigset_t. */ |
| 1150 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1151 | VG_USERREQ__SIGWAIT, |
| 1152 | set, sig, 0, 0); |
| 1153 | return res; |
| 1154 | } |
| 1155 | |
| 1156 | |
sewardj | 018f762 | 2002-05-15 21:13:39 +0000 | [diff] [blame] | 1157 | int pthread_kill(pthread_t thread, int signo) |
| 1158 | { |
| 1159 | int res; |
| 1160 | ensure_valgrind("pthread_kill"); |
| 1161 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1162 | VG_USERREQ__PTHREAD_KILL, |
| 1163 | thread, signo, 0, 0); |
| 1164 | return res; |
| 1165 | } |
| 1166 | |
| 1167 | |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1168 | /* Copied verbatim from Linuxthreads */ |
| 1169 | /* Redefine raise() to send signal to calling thread only, |
| 1170 | as per POSIX 1003.1c */ |
| 1171 | int raise (int sig) |
| 1172 | { |
| 1173 | int retcode = pthread_kill(pthread_self(), sig); |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1174 | if (retcode == 0) { |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1175 | return 0; |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 1176 | } else { |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1177 | errno = retcode; |
| 1178 | return -1; |
| 1179 | } |
| 1180 | } |
| 1181 | |
| 1182 | |
sewardj | 9a2224b | 2002-06-19 10:17:40 +0000 | [diff] [blame] | 1183 | int pause ( void ) |
| 1184 | { |
| 1185 | unsigned int n_orig, n_now; |
| 1186 | struct vki_timespec nanosleep_interval; |
| 1187 | ensure_valgrind("pause"); |
| 1188 | |
| 1189 | /* This is surely a cancellation point. */ |
| 1190 | __my_pthread_testcancel(); |
| 1191 | |
| 1192 | VALGRIND_MAGIC_SEQUENCE(n_orig, 0xFFFFFFFF /* default */, |
| 1193 | VG_USERREQ__GET_N_SIGS_RETURNED, |
| 1194 | 0, 0, 0, 0); |
| 1195 | my_assert(n_orig != 0xFFFFFFFF); |
| 1196 | |
| 1197 | while (1) { |
| 1198 | VALGRIND_MAGIC_SEQUENCE(n_now, 0xFFFFFFFF /* default */, |
| 1199 | VG_USERREQ__GET_N_SIGS_RETURNED, |
| 1200 | 0, 0, 0, 0); |
| 1201 | my_assert(n_now != 0xFFFFFFFF); |
| 1202 | my_assert(n_now >= n_orig); |
| 1203 | if (n_now != n_orig) break; |
| 1204 | |
| 1205 | nanosleep_interval.tv_sec = 0; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1206 | nanosleep_interval.tv_nsec = 12 * 1000 * 1000; /* 12 milliseconds */ |
sewardj | 9a2224b | 2002-06-19 10:17:40 +0000 | [diff] [blame] | 1207 | /* It's critical here that valgrind's nanosleep implementation |
| 1208 | is nonblocking. */ |
| 1209 | (void)my_do_syscall2(__NR_nanosleep, |
| 1210 | (int)(&nanosleep_interval), (int)NULL); |
| 1211 | } |
| 1212 | |
| 1213 | * (__errno_location()) = EINTR; |
| 1214 | return -1; |
| 1215 | } |
| 1216 | |
| 1217 | |
sewardj | b48e500 | 2002-05-13 00:16:03 +0000 | [diff] [blame] | 1218 | /* --------------------------------------------------- |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1219 | THREAD-SPECIFICs |
| 1220 | ------------------------------------------------ */ |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1221 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1222 | int __pthread_key_create(pthread_key_t *key, |
| 1223 | void (*destr_function) (void *)) |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1224 | { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1225 | int res; |
| 1226 | ensure_valgrind("pthread_key_create"); |
| 1227 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1228 | VG_USERREQ__PTHREAD_KEY_CREATE, |
| 1229 | key, destr_function, 0, 0); |
| 1230 | return res; |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1231 | } |
| 1232 | |
| 1233 | int pthread_key_delete(pthread_key_t key) |
| 1234 | { |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 1235 | static int moans = N_MOANS; |
| 1236 | if (moans-- > 0) |
| 1237 | ignored("pthread_key_delete"); |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1238 | return 0; |
| 1239 | } |
| 1240 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1241 | int __pthread_setspecific(pthread_key_t key, const void *pointer) |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1242 | { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1243 | int res; |
| 1244 | ensure_valgrind("pthread_setspecific"); |
| 1245 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1246 | VG_USERREQ__PTHREAD_SETSPECIFIC, |
| 1247 | key, pointer, 0, 0); |
| 1248 | return res; |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1249 | } |
| 1250 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1251 | void * __pthread_getspecific(pthread_key_t key) |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1252 | { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 1253 | int res; |
| 1254 | ensure_valgrind("pthread_getspecific"); |
| 1255 | VALGRIND_MAGIC_SEQUENCE(res, 0 /* default */, |
| 1256 | VG_USERREQ__PTHREAD_GETSPECIFIC, |
| 1257 | key, 0 , 0, 0); |
| 1258 | return (void*)res; |
sewardj | 5e5fa51 | 2002-04-14 13:13:05 +0000 | [diff] [blame] | 1259 | } |
| 1260 | |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1261 | |
| 1262 | /* --------------------------------------------------- |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1263 | ONCEry |
| 1264 | ------------------------------------------------ */ |
| 1265 | |
| 1266 | static pthread_mutex_t once_masterlock = PTHREAD_MUTEX_INITIALIZER; |
| 1267 | |
| 1268 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1269 | int __pthread_once ( pthread_once_t *once_control, |
| 1270 | void (*init_routine) (void) ) |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1271 | { |
| 1272 | int res; |
| 1273 | ensure_valgrind("pthread_once"); |
| 1274 | |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 1275 | res = __pthread_mutex_lock(&once_masterlock); |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1276 | |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 1277 | if (res != 0) { |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1278 | barf("pthread_once: Looks like your program's " |
| 1279 | "init routine calls back to pthread_once() ?!"); |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 1280 | } |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1281 | |
| 1282 | if (*once_control == 0) { |
| 1283 | *once_control = 1; |
| 1284 | init_routine(); |
| 1285 | } |
| 1286 | |
sewardj | 68b2dd9 | 2002-05-10 21:03:56 +0000 | [diff] [blame] | 1287 | __pthread_mutex_unlock(&once_masterlock); |
sewardj | 89d3d85 | 2002-04-24 19:21:39 +0000 | [diff] [blame] | 1288 | |
| 1289 | return 0; |
| 1290 | } |
| 1291 | |
| 1292 | |
| 1293 | /* --------------------------------------------------- |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1294 | MISC |
| 1295 | ------------------------------------------------ */ |
| 1296 | |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 1297 | static pthread_mutex_t pthread_atfork_lock |
| 1298 | = PTHREAD_MUTEX_INITIALIZER; |
| 1299 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1300 | int __pthread_atfork ( void (*prepare)(void), |
| 1301 | void (*parent)(void), |
| 1302 | void (*child)(void) ) |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1303 | { |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 1304 | int n, res; |
| 1305 | ForkHandlerEntry entry; |
| 1306 | |
| 1307 | ensure_valgrind("pthread_atfork"); |
| 1308 | __pthread_mutex_lock(&pthread_atfork_lock); |
| 1309 | |
| 1310 | /* Fetch old counter */ |
| 1311 | VALGRIND_MAGIC_SEQUENCE(n, -2 /* default */, |
| 1312 | VG_USERREQ__GET_FHSTACK_USED, |
| 1313 | 0, 0, 0, 0); |
| 1314 | my_assert(n >= 0 && n < VG_N_FORKHANDLERSTACK); |
| 1315 | if (n == VG_N_FORKHANDLERSTACK-1) |
| 1316 | barf("pthread_atfork: VG_N_FORKHANDLERSTACK is too low; " |
| 1317 | "increase and recompile"); |
| 1318 | |
| 1319 | /* Add entry */ |
| 1320 | entry.prepare = *prepare; |
| 1321 | entry.parent = *parent; |
| 1322 | entry.child = *child; |
| 1323 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 1324 | VG_USERREQ__SET_FHSTACK_ENTRY, |
| 1325 | n, &entry, 0, 0); |
| 1326 | my_assert(res == 0); |
| 1327 | |
| 1328 | /* Bump counter */ |
| 1329 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 1330 | VG_USERREQ__SET_FHSTACK_USED, |
| 1331 | n+1, 0, 0, 0); |
| 1332 | my_assert(res == 0); |
| 1333 | |
| 1334 | __pthread_mutex_unlock(&pthread_atfork_lock); |
| 1335 | return 0; |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1336 | } |
| 1337 | |
| 1338 | |
sewardj | bb99078 | 2002-05-08 02:01:14 +0000 | [diff] [blame] | 1339 | __attribute__((weak)) |
| 1340 | void __pthread_initialize ( void ) |
| 1341 | { |
sewardj | bea1caa | 2002-05-10 23:20:58 +0000 | [diff] [blame] | 1342 | ensure_valgrind("__pthread_initialize"); |
sewardj | bb99078 | 2002-05-08 02:01:14 +0000 | [diff] [blame] | 1343 | } |
| 1344 | |
| 1345 | |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1346 | /* --------------------------------------------------- |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1347 | LIBRARY-PRIVATE THREAD SPECIFIC STATE |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1348 | ------------------------------------------------ */ |
| 1349 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1350 | #include <resolv.h> |
| 1351 | static int thread_specific_errno[VG_N_THREADS]; |
| 1352 | static int thread_specific_h_errno[VG_N_THREADS]; |
| 1353 | static struct __res_state |
| 1354 | thread_specific_res_state[VG_N_THREADS]; |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1355 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1356 | int* __errno_location ( void ) |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1357 | { |
| 1358 | int tid; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1359 | /* ensure_valgrind("__errno_location"); */ |
| 1360 | VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1361 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 1362 | 0, 0, 0, 0); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1363 | /* 'cos I'm paranoid ... */ |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 1364 | if (tid < 1 || tid >= VG_N_THREADS) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1365 | barf("__errno_location: invalid ThreadId"); |
| 1366 | return & thread_specific_errno[tid]; |
| 1367 | } |
| 1368 | |
| 1369 | int* __h_errno_location ( void ) |
| 1370 | { |
| 1371 | int tid; |
| 1372 | /* ensure_valgrind("__h_errno_location"); */ |
| 1373 | VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
| 1374 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 1375 | 0, 0, 0, 0); |
| 1376 | /* 'cos I'm paranoid ... */ |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 1377 | if (tid < 1 || tid >= VG_N_THREADS) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1378 | barf("__h_errno_location: invalid ThreadId"); |
| 1379 | return & thread_specific_h_errno[tid]; |
| 1380 | } |
| 1381 | |
sewardj | b0ff103 | 2002-08-06 09:02:53 +0000 | [diff] [blame] | 1382 | |
| 1383 | #undef _res |
| 1384 | extern struct __res_state _res; |
| 1385 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1386 | struct __res_state* __res_state ( void ) |
| 1387 | { |
| 1388 | int tid; |
| 1389 | /* ensure_valgrind("__res_state"); */ |
| 1390 | VALGRIND_MAGIC_SEQUENCE(tid, 1 /* default */, |
| 1391 | VG_USERREQ__PTHREAD_GET_THREADID, |
| 1392 | 0, 0, 0, 0); |
| 1393 | /* 'cos I'm paranoid ... */ |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 1394 | if (tid < 1 || tid >= VG_N_THREADS) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1395 | barf("__res_state: invalid ThreadId"); |
sewardj | b0ff103 | 2002-08-06 09:02:53 +0000 | [diff] [blame] | 1396 | if (tid == 1) |
| 1397 | return & _res; |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1398 | return & thread_specific_res_state[tid]; |
sewardj | f8f819e | 2002-04-17 23:21:37 +0000 | [diff] [blame] | 1399 | } |
| 1400 | |
| 1401 | |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1402 | /* --------------------------------------------------- |
| 1403 | LIBC-PRIVATE SPECIFIC DATA |
| 1404 | ------------------------------------------------ */ |
| 1405 | |
| 1406 | /* Relies on assumption that initial private data is NULL. This |
| 1407 | should be fixed somehow. */ |
| 1408 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1409 | /* The allowable keys (indices) (all 3 of them). |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1410 | From sysdeps/pthread/bits/libc-tsd.h |
| 1411 | */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1412 | /* as per glibc anoncvs HEAD of 20021001. */ |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1413 | enum __libc_tsd_key_t { _LIBC_TSD_KEY_MALLOC = 0, |
| 1414 | _LIBC_TSD_KEY_DL_ERROR, |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1415 | _LIBC_TSD_KEY_RPC_VARS, |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1416 | _LIBC_TSD_KEY_LOCALE, |
| 1417 | _LIBC_TSD_KEY_CTYPE_B, |
| 1418 | _LIBC_TSD_KEY_CTYPE_TOLOWER, |
| 1419 | _LIBC_TSD_KEY_CTYPE_TOUPPER, |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1420 | _LIBC_TSD_KEY_N }; |
| 1421 | |
| 1422 | /* Auto-initialising subsystem. libc_specifics_inited is set |
| 1423 | after initialisation. libc_specifics_inited_mx guards it. */ |
| 1424 | static int libc_specifics_inited = 0; |
| 1425 | static pthread_mutex_t libc_specifics_inited_mx = PTHREAD_MUTEX_INITIALIZER; |
| 1426 | |
| 1427 | /* These are the keys we must initialise the first time. */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1428 | static pthread_key_t libc_specifics_keys[_LIBC_TSD_KEY_N]; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1429 | |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1430 | /* Initialise the keys, if they are not already initialised. */ |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1431 | static |
| 1432 | void init_libc_tsd_keys ( void ) |
| 1433 | { |
| 1434 | int res, i; |
| 1435 | pthread_key_t k; |
| 1436 | |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 1437 | /* Don't fall into deadlock if we get called again whilst we still |
| 1438 | hold the lock, via the __uselocale() call herein. */ |
| 1439 | if (libc_specifics_inited != 0) |
| 1440 | return; |
| 1441 | |
| 1442 | /* Take the lock. */ |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1443 | res = pthread_mutex_lock(&libc_specifics_inited_mx); |
| 1444 | if (res != 0) barf("init_libc_tsd_keys: lock"); |
| 1445 | |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 1446 | /* Now test again, to be sure there is no mistake. */ |
| 1447 | if (libc_specifics_inited != 0) { |
| 1448 | res = pthread_mutex_unlock(&libc_specifics_inited_mx); |
| 1449 | if (res != 0) barf("init_libc_tsd_keys: unlock(1)"); |
| 1450 | return; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1451 | } |
| 1452 | |
sewardj | 08c7f01 | 2002-10-07 23:56:55 +0000 | [diff] [blame^] | 1453 | /* Actually do the initialisation. */ |
| 1454 | /* printf("INIT libc specifics\n"); */ |
| 1455 | for (i = 0; i < _LIBC_TSD_KEY_N; i++) { |
| 1456 | res = pthread_key_create(&k, NULL); |
| 1457 | if (res != 0) barf("init_libc_tsd_keys: create"); |
| 1458 | libc_specifics_keys[i] = k; |
| 1459 | } |
| 1460 | |
| 1461 | /* Signify init done. */ |
| 1462 | libc_specifics_inited = 1; |
| 1463 | |
| 1464 | # ifdef GLIBC_2_3 |
| 1465 | /* Set the initialising thread's locale to the global (default) |
| 1466 | locale. A hack in support of glibc-2.3. */ |
| 1467 | __uselocale(LC_GLOBAL_LOCALE); |
| 1468 | # endif |
| 1469 | |
| 1470 | /* Unlock and return. */ |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1471 | res = pthread_mutex_unlock(&libc_specifics_inited_mx); |
| 1472 | if (res != 0) barf("init_libc_tsd_keys: unlock"); |
| 1473 | } |
| 1474 | |
| 1475 | |
| 1476 | static int |
| 1477 | libc_internal_tsd_set ( enum __libc_tsd_key_t key, |
| 1478 | const void * pointer ) |
| 1479 | { |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1480 | int res; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1481 | /* printf("SET SET SET key %d ptr %p\n", key, pointer); */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1482 | if (key < _LIBC_TSD_KEY_MALLOC || key >= _LIBC_TSD_KEY_N) |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1483 | barf("libc_internal_tsd_set: invalid key"); |
| 1484 | init_libc_tsd_keys(); |
| 1485 | res = pthread_setspecific(libc_specifics_keys[key], pointer); |
| 1486 | if (res != 0) barf("libc_internal_tsd_set: setspecific failed"); |
| 1487 | return 0; |
| 1488 | } |
| 1489 | |
| 1490 | static void * |
| 1491 | libc_internal_tsd_get ( enum __libc_tsd_key_t key ) |
| 1492 | { |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1493 | void* v; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1494 | /* printf("GET GET GET key %d\n", key); */ |
sewardj | cb7f08a | 2002-10-02 09:41:49 +0000 | [diff] [blame] | 1495 | if (key < _LIBC_TSD_KEY_MALLOC || key >= _LIBC_TSD_KEY_N) |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1496 | barf("libc_internal_tsd_get: invalid key"); |
| 1497 | init_libc_tsd_keys(); |
| 1498 | v = pthread_getspecific(libc_specifics_keys[key]); |
| 1499 | /* if (v == NULL) barf("libc_internal_tsd_set: getspecific failed"); */ |
| 1500 | return v; |
| 1501 | } |
| 1502 | |
| 1503 | |
| 1504 | |
sewardj | 70adeb2 | 2002-04-27 01:35:38 +0000 | [diff] [blame] | 1505 | int (*__libc_internal_tsd_set) |
| 1506 | (enum __libc_tsd_key_t key, const void * pointer) |
| 1507 | = libc_internal_tsd_set; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1508 | |
sewardj | 70adeb2 | 2002-04-27 01:35:38 +0000 | [diff] [blame] | 1509 | void* (*__libc_internal_tsd_get) |
| 1510 | (enum __libc_tsd_key_t key) |
| 1511 | = libc_internal_tsd_get; |
sewardj | 5716dbb | 2002-04-26 03:28:18 +0000 | [diff] [blame] | 1512 | |
| 1513 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1514 | /* --------------------------------------------------------------------- |
| 1515 | These are here (I think) because they are deemed cancellation |
| 1516 | points by POSIX. For the moment we'll simply pass the call along |
| 1517 | to the corresponding thread-unaware (?) libc routine. |
| 1518 | ------------------------------------------------------------------ */ |
| 1519 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1520 | #include <stdlib.h> |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1521 | #include <sys/types.h> |
| 1522 | #include <sys/socket.h> |
| 1523 | |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 1524 | #ifdef GLIBC_2_1 |
| 1525 | extern |
| 1526 | int __sigaction |
| 1527 | (int signum, |
| 1528 | const struct sigaction *act, |
| 1529 | struct sigaction *oldact); |
| 1530 | #else |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1531 | extern |
| 1532 | int __libc_sigaction |
| 1533 | (int signum, |
| 1534 | const struct sigaction *act, |
| 1535 | struct sigaction *oldact); |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 1536 | #endif |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1537 | int sigaction(int signum, |
| 1538 | const struct sigaction *act, |
| 1539 | struct sigaction *oldact) |
| 1540 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1541 | __my_pthread_testcancel(); |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 1542 | # ifdef GLIBC_2_1 |
| 1543 | return __sigaction(signum, act, oldact); |
| 1544 | # else |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1545 | return __libc_sigaction(signum, act, oldact); |
sewardj | 2a1dcce | 2002-04-22 12:45:25 +0000 | [diff] [blame] | 1546 | # endif |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1547 | } |
| 1548 | |
| 1549 | |
| 1550 | extern |
| 1551 | int __libc_connect(int sockfd, |
| 1552 | const struct sockaddr *serv_addr, |
| 1553 | socklen_t addrlen); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1554 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1555 | int connect(int sockfd, |
| 1556 | const struct sockaddr *serv_addr, |
| 1557 | socklen_t addrlen) |
| 1558 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1559 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1560 | return __libc_connect(sockfd, serv_addr, addrlen); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1561 | } |
| 1562 | |
| 1563 | |
| 1564 | extern |
| 1565 | int __libc_fcntl(int fd, int cmd, long arg); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1566 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1567 | int fcntl(int fd, int cmd, long arg) |
| 1568 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1569 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1570 | return __libc_fcntl(fd, cmd, arg); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1571 | } |
| 1572 | |
| 1573 | |
| 1574 | extern |
| 1575 | ssize_t __libc_write(int fd, const void *buf, size_t count); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1576 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1577 | ssize_t write(int fd, const void *buf, size_t count) |
| 1578 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1579 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1580 | return __libc_write(fd, buf, count); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1581 | } |
| 1582 | |
| 1583 | |
| 1584 | extern |
| 1585 | ssize_t __libc_read(int fd, void *buf, size_t count); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1586 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1587 | ssize_t read(int fd, void *buf, size_t count) |
| 1588 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1589 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1590 | return __libc_read(fd, buf, count); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1591 | } |
| 1592 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1593 | |
| 1594 | extern |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1595 | int __libc_open64(const char *pathname, int flags, mode_t mode); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1596 | __attribute__((weak)) |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1597 | int open64(const char *pathname, int flags, mode_t mode) |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1598 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1599 | __my_pthread_testcancel(); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1600 | return __libc_open64(pathname, flags, mode); |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1601 | } |
| 1602 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1603 | |
| 1604 | extern |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1605 | int __libc_open(const char *pathname, int flags, mode_t mode); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1606 | __attribute__((weak)) |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1607 | int open(const char *pathname, int flags, mode_t mode) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1608 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1609 | __my_pthread_testcancel(); |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 1610 | return __libc_open(pathname, flags, mode); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1611 | } |
| 1612 | |
| 1613 | |
| 1614 | extern |
| 1615 | int __libc_close(int fd); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1616 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1617 | int close(int fd) |
| 1618 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1619 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1620 | return __libc_close(fd); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1621 | } |
| 1622 | |
| 1623 | |
| 1624 | extern |
| 1625 | int __libc_accept(int s, struct sockaddr *addr, socklen_t *addrlen); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1626 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1627 | int accept(int s, struct sockaddr *addr, socklen_t *addrlen) |
| 1628 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1629 | __my_pthread_testcancel(); |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 1630 | wait_for_fd_to_be_readable_or_erring(s); |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1631 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1632 | return __libc_accept(s, addr, addrlen); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1633 | } |
| 1634 | |
| 1635 | |
| 1636 | extern |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1637 | pid_t __libc_waitpid(pid_t pid, int *status, int options); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1638 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1639 | pid_t waitpid(pid_t pid, int *status, int options) |
| 1640 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1641 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1642 | return __libc_waitpid(pid, status, options); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1643 | } |
| 1644 | |
| 1645 | |
| 1646 | extern |
| 1647 | int __libc_nanosleep(const struct timespec *req, struct timespec *rem); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1648 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1649 | int nanosleep(const struct timespec *req, struct timespec *rem) |
| 1650 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1651 | __my_pthread_testcancel(); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1652 | return __libc_nanosleep(req, rem); |
| 1653 | } |
| 1654 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1655 | |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1656 | extern |
| 1657 | int __libc_fsync(int fd); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1658 | __attribute__((weak)) |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1659 | int fsync(int fd) |
| 1660 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1661 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1662 | return __libc_fsync(fd); |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1663 | } |
| 1664 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1665 | |
sewardj | 70c7536 | 2002-04-13 04:18:32 +0000 | [diff] [blame] | 1666 | extern |
| 1667 | off_t __libc_lseek(int fildes, off_t offset, int whence); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1668 | __attribute__((weak)) |
sewardj | 70c7536 | 2002-04-13 04:18:32 +0000 | [diff] [blame] | 1669 | off_t lseek(int fildes, off_t offset, int whence) |
| 1670 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1671 | __my_pthread_testcancel(); |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1672 | return __libc_lseek(fildes, offset, whence); |
sewardj | 70c7536 | 2002-04-13 04:18:32 +0000 | [diff] [blame] | 1673 | } |
| 1674 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1675 | |
| 1676 | extern |
| 1677 | __off64_t __libc_lseek64(int fildes, __off64_t offset, int whence); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1678 | __attribute__((weak)) |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1679 | __off64_t lseek64(int fildes, __off64_t offset, int whence) |
| 1680 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1681 | __my_pthread_testcancel(); |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1682 | return __libc_lseek64(fildes, offset, whence); |
| 1683 | } |
| 1684 | |
| 1685 | |
sewardj | 726c412 | 2002-05-16 23:39:10 +0000 | [diff] [blame] | 1686 | extern |
| 1687 | ssize_t __libc_pread64 (int __fd, void *__buf, size_t __nbytes, |
| 1688 | __off64_t __offset); |
| 1689 | ssize_t __pread64 (int __fd, void *__buf, size_t __nbytes, |
| 1690 | __off64_t __offset) |
| 1691 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1692 | __my_pthread_testcancel(); |
sewardj | 726c412 | 2002-05-16 23:39:10 +0000 | [diff] [blame] | 1693 | return __libc_pread64(__fd, __buf, __nbytes, __offset); |
| 1694 | } |
| 1695 | |
| 1696 | |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 1697 | extern |
| 1698 | ssize_t __libc_pwrite64 (int __fd, const void *__buf, size_t __nbytes, |
| 1699 | __off64_t __offset); |
| 1700 | ssize_t __pwrite64 (int __fd, const void *__buf, size_t __nbytes, |
| 1701 | __off64_t __offset) |
| 1702 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1703 | __my_pthread_testcancel(); |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 1704 | return __libc_pwrite64(__fd, __buf, __nbytes, __offset); |
| 1705 | } |
| 1706 | |
sewardj | 726c412 | 2002-05-16 23:39:10 +0000 | [diff] [blame] | 1707 | |
sewardj | 39b93b1 | 2002-05-18 10:56:27 +0000 | [diff] [blame] | 1708 | extern |
| 1709 | ssize_t __libc_pwrite(int fd, const void *buf, size_t count, off_t offset); |
| 1710 | __attribute__((weak)) |
| 1711 | ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset) |
| 1712 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1713 | __my_pthread_testcancel(); |
sewardj | 39b93b1 | 2002-05-18 10:56:27 +0000 | [diff] [blame] | 1714 | return __libc_pwrite(fd, buf, count, offset); |
| 1715 | } |
| 1716 | |
| 1717 | |
| 1718 | extern |
| 1719 | ssize_t __libc_pread(int fd, void *buf, size_t count, off_t offset); |
| 1720 | __attribute__((weak)) |
| 1721 | ssize_t pread(int fd, void *buf, size_t count, off_t offset) |
| 1722 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1723 | __my_pthread_testcancel(); |
sewardj | 39b93b1 | 2002-05-18 10:56:27 +0000 | [diff] [blame] | 1724 | return __libc_pread(fd, buf, count, offset); |
| 1725 | } |
| 1726 | |
| 1727 | |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 1728 | extern |
| 1729 | void __libc_longjmp(jmp_buf env, int val) __attribute((noreturn)); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1730 | /* not weak: __attribute__((weak)) */ |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 1731 | void longjmp(jmp_buf env, int val) |
| 1732 | { |
| 1733 | __libc_longjmp(env, val); |
| 1734 | } |
| 1735 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1736 | |
sewardj | 436c2db | 2002-06-18 09:07:54 +0000 | [diff] [blame] | 1737 | extern void __libc_siglongjmp (sigjmp_buf env, int val) |
| 1738 | __attribute__ ((noreturn)); |
| 1739 | void siglongjmp(sigjmp_buf env, int val) |
| 1740 | { |
| 1741 | kludged("siglongjmp (cleanup handlers are ignored)"); |
| 1742 | __libc_siglongjmp(env, val); |
| 1743 | } |
| 1744 | |
| 1745 | |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 1746 | extern |
| 1747 | int __libc_send(int s, const void *msg, size_t len, int flags); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1748 | __attribute__((weak)) |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 1749 | int send(int s, const void *msg, size_t len, int flags) |
| 1750 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1751 | __my_pthread_testcancel(); |
sewardj | 6af4b5d | 2002-04-16 04:40:49 +0000 | [diff] [blame] | 1752 | return __libc_send(s, msg, len, flags); |
| 1753 | } |
| 1754 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1755 | |
sewardj | 1e8cdc9 | 2002-04-18 11:37:52 +0000 | [diff] [blame] | 1756 | extern |
| 1757 | int __libc_recv(int s, void *buf, size_t len, int flags); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1758 | __attribute__((weak)) |
sewardj | 1e8cdc9 | 2002-04-18 11:37:52 +0000 | [diff] [blame] | 1759 | int recv(int s, void *buf, size_t len, int flags) |
| 1760 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1761 | __my_pthread_testcancel(); |
sewardj | 1d6b3a2 | 2002-06-20 07:58:33 +0000 | [diff] [blame] | 1762 | wait_for_fd_to_be_readable_or_erring(s); |
| 1763 | __my_pthread_testcancel(); |
sewardj | 1e8cdc9 | 2002-04-18 11:37:52 +0000 | [diff] [blame] | 1764 | return __libc_recv(s, buf, len, flags); |
| 1765 | } |
| 1766 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1767 | |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1768 | extern |
| 1769 | int __libc_sendmsg(int s, const struct msghdr *msg, int flags); |
| 1770 | __attribute__((weak)) |
| 1771 | int sendmsg(int s, const struct msghdr *msg, int flags) |
| 1772 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1773 | __my_pthread_testcancel(); |
sewardj | 3665ded | 2002-05-16 16:57:25 +0000 | [diff] [blame] | 1774 | return __libc_sendmsg(s, msg, flags); |
| 1775 | } |
| 1776 | |
| 1777 | |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 1778 | extern |
sewardj | 59da27a | 2002-06-06 08:33:54 +0000 | [diff] [blame] | 1779 | int __libc_recvmsg(int s, struct msghdr *msg, int flags); |
| 1780 | __attribute__((weak)) |
| 1781 | int recvmsg(int s, struct msghdr *msg, int flags) |
| 1782 | { |
| 1783 | __my_pthread_testcancel(); |
| 1784 | return __libc_recvmsg(s, msg, flags); |
| 1785 | } |
| 1786 | |
| 1787 | |
| 1788 | extern |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 1789 | int __libc_recvfrom(int s, void *buf, size_t len, int flags, |
| 1790 | struct sockaddr *from, socklen_t *fromlen); |
| 1791 | __attribute__((weak)) |
| 1792 | int recvfrom(int s, void *buf, size_t len, int flags, |
| 1793 | struct sockaddr *from, socklen_t *fromlen) |
| 1794 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1795 | __my_pthread_testcancel(); |
sewardj | 2e20763 | 2002-06-13 17:29:53 +0000 | [diff] [blame] | 1796 | wait_for_fd_to_be_readable_or_erring(s); |
| 1797 | __my_pthread_testcancel(); |
sewardj | 436e058 | 2002-04-26 14:31:40 +0000 | [diff] [blame] | 1798 | return __libc_recvfrom(s, buf, len, flags, from, fromlen); |
| 1799 | } |
| 1800 | |
| 1801 | |
| 1802 | extern |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 1803 | int __libc_sendto(int s, const void *msg, size_t len, int flags, |
| 1804 | const struct sockaddr *to, socklen_t tolen); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1805 | __attribute__((weak)) |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 1806 | int sendto(int s, const void *msg, size_t len, int flags, |
| 1807 | const struct sockaddr *to, socklen_t tolen) |
| 1808 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1809 | __my_pthread_testcancel(); |
sewardj | 796d6a2 | 2002-04-24 02:28:34 +0000 | [diff] [blame] | 1810 | return __libc_sendto(s, msg, len, flags, to, tolen); |
| 1811 | } |
| 1812 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1813 | |
sewardj | 369b170 | 2002-04-24 13:28:15 +0000 | [diff] [blame] | 1814 | extern |
| 1815 | int __libc_system(const char* str); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1816 | __attribute__((weak)) |
sewardj | 369b170 | 2002-04-24 13:28:15 +0000 | [diff] [blame] | 1817 | int system(const char* str) |
| 1818 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1819 | __my_pthread_testcancel(); |
sewardj | 369b170 | 2002-04-24 13:28:15 +0000 | [diff] [blame] | 1820 | return __libc_system(str); |
| 1821 | } |
| 1822 | |
sewardj | be32e45 | 2002-04-24 20:29:58 +0000 | [diff] [blame] | 1823 | |
sewardj | ab0b1c3 | 2002-04-24 19:26:47 +0000 | [diff] [blame] | 1824 | extern |
| 1825 | pid_t __libc_wait(int *status); |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1826 | __attribute__((weak)) |
sewardj | ab0b1c3 | 2002-04-24 19:26:47 +0000 | [diff] [blame] | 1827 | pid_t wait(int *status) |
| 1828 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1829 | __my_pthread_testcancel(); |
sewardj | ab0b1c3 | 2002-04-24 19:26:47 +0000 | [diff] [blame] | 1830 | return __libc_wait(status); |
| 1831 | } |
| 1832 | |
sewardj | 45b4b37 | 2002-04-16 22:50:32 +0000 | [diff] [blame] | 1833 | |
sewardj | 67f1d58 | 2002-05-24 02:11:32 +0000 | [diff] [blame] | 1834 | extern |
| 1835 | int __libc_msync(const void *start, size_t length, int flags); |
| 1836 | __attribute__((weak)) |
| 1837 | int msync(const void *start, size_t length, int flags) |
| 1838 | { |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 1839 | __my_pthread_testcancel(); |
sewardj | 67f1d58 | 2002-05-24 02:11:32 +0000 | [diff] [blame] | 1840 | return __libc_msync(start, length, flags); |
| 1841 | } |
| 1842 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 1843 | |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 1844 | /*--- fork and its helper ---*/ |
| 1845 | |
| 1846 | static |
| 1847 | void run_fork_handlers ( int what ) |
| 1848 | { |
| 1849 | ForkHandlerEntry entry; |
| 1850 | int n_h, n_handlers, i, res; |
| 1851 | |
| 1852 | my_assert(what == 0 || what == 1 || what == 2); |
| 1853 | |
| 1854 | /* Fetch old counter */ |
| 1855 | VALGRIND_MAGIC_SEQUENCE(n_handlers, -2 /* default */, |
| 1856 | VG_USERREQ__GET_FHSTACK_USED, |
| 1857 | 0, 0, 0, 0); |
| 1858 | my_assert(n_handlers >= 0 && n_handlers < VG_N_FORKHANDLERSTACK); |
| 1859 | |
| 1860 | /* Prepare handlers (what == 0) are called in opposite order of |
| 1861 | calls to pthread_atfork. Parent and child handlers are called |
| 1862 | in the same order as calls to pthread_atfork. */ |
| 1863 | if (what == 0) |
| 1864 | n_h = n_handlers - 1; |
| 1865 | else |
| 1866 | n_h = 0; |
| 1867 | |
| 1868 | for (i = 0; i < n_handlers; i++) { |
| 1869 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 1870 | VG_USERREQ__GET_FHSTACK_ENTRY, |
| 1871 | n_h, &entry, 0, 0); |
| 1872 | my_assert(res == 0); |
| 1873 | switch (what) { |
| 1874 | case 0: if (entry.prepare) entry.prepare(); |
| 1875 | n_h--; break; |
| 1876 | case 1: if (entry.parent) entry.parent(); |
| 1877 | n_h++; break; |
| 1878 | case 2: if (entry.child) entry.child(); |
| 1879 | n_h++; break; |
| 1880 | default: barf("run_fork_handlers: invalid what"); |
| 1881 | } |
| 1882 | } |
| 1883 | |
| 1884 | if (what != 0 /* prepare */) { |
| 1885 | /* Empty out the stack. */ |
| 1886 | VALGRIND_MAGIC_SEQUENCE(res, -2 /* default */, |
| 1887 | VG_USERREQ__SET_FHSTACK_USED, |
| 1888 | 0, 0, 0, 0); |
| 1889 | my_assert(res == 0); |
| 1890 | } |
| 1891 | } |
| 1892 | |
| 1893 | extern |
| 1894 | pid_t __libc_fork(void); |
| 1895 | pid_t __fork(void) |
| 1896 | { |
| 1897 | pid_t pid; |
| 1898 | __my_pthread_testcancel(); |
| 1899 | __pthread_mutex_lock(&pthread_atfork_lock); |
| 1900 | |
| 1901 | run_fork_handlers(0 /* prepare */); |
| 1902 | pid = __libc_fork(); |
| 1903 | if (pid == 0) { |
| 1904 | /* I am the child */ |
| 1905 | run_fork_handlers(2 /* child */); |
| 1906 | __pthread_mutex_init(&pthread_atfork_lock, NULL); |
| 1907 | } else { |
| 1908 | /* I am the parent */ |
| 1909 | run_fork_handlers(1 /* parent */); |
| 1910 | __pthread_mutex_unlock(&pthread_atfork_lock); |
| 1911 | } |
| 1912 | return pid; |
| 1913 | } |
| 1914 | |
| 1915 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 1916 | pid_t __vfork(void) |
| 1917 | { |
| 1918 | return __fork(); |
| 1919 | } |
sewardj | 2cb0034 | 2002-06-28 01:46:26 +0000 | [diff] [blame] | 1920 | |
| 1921 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 1922 | /* --------------------------------------------------------------------- |
| 1923 | Nonblocking implementations of select() and poll(). This stuff will |
| 1924 | surely rot your mind. |
| 1925 | ------------------------------------------------------------------ */ |
sewardj | e663cb9 | 2002-04-12 10:26:32 +0000 | [diff] [blame] | 1926 | |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1927 | /*--------------------------------------------------*/ |
| 1928 | |
| 1929 | #include "vg_kerneliface.h" |
| 1930 | |
| 1931 | static |
| 1932 | __inline__ |
| 1933 | int is_kerror ( int res ) |
| 1934 | { |
| 1935 | if (res >= -4095 && res <= -1) |
| 1936 | return 1; |
| 1937 | else |
| 1938 | return 0; |
| 1939 | } |
| 1940 | |
| 1941 | |
| 1942 | static |
| 1943 | int my_do_syscall1 ( int syscallno, int arg1 ) |
| 1944 | { |
| 1945 | int __res; |
| 1946 | __asm__ volatile ("pushl %%ebx; movl %%edx,%%ebx ; int $0x80 ; popl %%ebx" |
| 1947 | : "=a" (__res) |
| 1948 | : "0" (syscallno), |
| 1949 | "d" (arg1) ); |
| 1950 | return __res; |
| 1951 | } |
| 1952 | |
| 1953 | static |
| 1954 | int my_do_syscall2 ( int syscallno, |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 1955 | int arg1, int arg2 ) |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1956 | { |
| 1957 | int __res; |
| 1958 | __asm__ volatile ("pushl %%ebx; movl %%edx,%%ebx ; int $0x80 ; popl %%ebx" |
| 1959 | : "=a" (__res) |
| 1960 | : "0" (syscallno), |
| 1961 | "d" (arg1), |
| 1962 | "c" (arg2) ); |
| 1963 | return __res; |
| 1964 | } |
| 1965 | |
| 1966 | static |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 1967 | int my_do_syscall3 ( int syscallno, |
| 1968 | int arg1, int arg2, int arg3 ) |
| 1969 | { |
| 1970 | int __res; |
| 1971 | __asm__ volatile ("pushl %%ebx; movl %%esi,%%ebx ; int $0x80 ; popl %%ebx" |
| 1972 | : "=a" (__res) |
| 1973 | : "0" (syscallno), |
| 1974 | "S" (arg1), |
| 1975 | "c" (arg2), |
| 1976 | "d" (arg3) ); |
| 1977 | return __res; |
| 1978 | } |
| 1979 | |
| 1980 | static |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1981 | int do_syscall_select( int n, |
| 1982 | vki_fd_set* readfds, |
| 1983 | vki_fd_set* writefds, |
| 1984 | vki_fd_set* exceptfds, |
| 1985 | struct vki_timeval * timeout ) |
| 1986 | { |
| 1987 | int res; |
| 1988 | int args[5]; |
| 1989 | args[0] = n; |
| 1990 | args[1] = (int)readfds; |
| 1991 | args[2] = (int)writefds; |
| 1992 | args[3] = (int)exceptfds; |
| 1993 | args[4] = (int)timeout; |
| 1994 | res = my_do_syscall1(__NR_select, (int)(&(args[0])) ); |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 1995 | return res; |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 1996 | } |
| 1997 | |
| 1998 | |
| 1999 | /* This is a wrapper round select(), which makes it thread-safe, |
| 2000 | meaning that only this thread will block, rather than the entire |
| 2001 | process. This wrapper in turn depends on nanosleep() not to block |
| 2002 | the entire process, but I think (hope? suspect?) that POSIX |
| 2003 | pthreads guarantees that to be the case. |
| 2004 | |
| 2005 | Basic idea is: modify the timeout parameter to select so that it |
| 2006 | returns immediately. Poll like this until select returns non-zero, |
| 2007 | indicating something interesting happened, or until our time is up. |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2008 | Space out the polls with nanosleeps of say 11 milliseconds, which |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2009 | is required to be nonblocking; this allows other threads to run. |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2010 | |
| 2011 | Assumes: |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2012 | * (checked via my_assert) types fd_set and vki_fd_set are identical. |
| 2013 | * (checked via my_assert) types timeval and vki_timeval are identical. |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2014 | * (unchecked) libc error numbers (EINTR etc) are the negation of the |
| 2015 | kernel's error numbers (VKI_EINTR etc). |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2016 | */ |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2017 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2018 | /* __attribute__((weak)) */ |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2019 | int select ( int n, |
| 2020 | fd_set *rfds, |
| 2021 | fd_set *wfds, |
| 2022 | fd_set *xfds, |
| 2023 | struct timeval *timeout ) |
| 2024 | { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2025 | unsigned int ms_now, ms_end; |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2026 | int res; |
| 2027 | fd_set rfds_copy; |
| 2028 | fd_set wfds_copy; |
| 2029 | fd_set xfds_copy; |
| 2030 | struct vki_timeval t_now; |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2031 | struct vki_timeval zero_timeout; |
| 2032 | struct vki_timespec nanosleep_interval; |
| 2033 | |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2034 | __my_pthread_testcancel(); |
| 2035 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2036 | /* gcc's complains about ms_end being used uninitialised -- classic |
| 2037 | case it can't understand, where ms_end is both defined and used |
| 2038 | only if timeout != NULL. Hence ... */ |
| 2039 | ms_end = 0; |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2040 | |
| 2041 | /* We assume that the kernel and libc data layouts are identical |
| 2042 | for the following types. These asserts provide a crude |
| 2043 | check. */ |
| 2044 | if (sizeof(fd_set) != sizeof(vki_fd_set) |
| 2045 | || sizeof(struct timeval) != sizeof(struct vki_timeval)) |
| 2046 | barf("valgrind's hacky non-blocking select(): data sizes error"); |
| 2047 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2048 | /* Detect the current time and simultaneously find out if we are |
| 2049 | running on Valgrind. */ |
| 2050 | VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| 2051 | VG_USERREQ__READ_MILLISECOND_TIMER, |
| 2052 | 0, 0, 0, 0); |
| 2053 | |
| 2054 | /* If a zero timeout specified, this call is harmless. Also go |
| 2055 | this route if we're not running on Valgrind, for whatever |
| 2056 | reason. */ |
| 2057 | if ( (timeout && timeout->tv_sec == 0 && timeout->tv_usec == 0) |
| 2058 | || (ms_now == 0xFFFFFFFF) ) { |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2059 | res = do_syscall_select( n, (vki_fd_set*)rfds, |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2060 | (vki_fd_set*)wfds, |
| 2061 | (vki_fd_set*)xfds, |
| 2062 | (struct vki_timeval*)timeout); |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2063 | if (is_kerror(res)) { |
| 2064 | * (__errno_location()) = -res; |
| 2065 | return -1; |
| 2066 | } else { |
| 2067 | return res; |
| 2068 | } |
| 2069 | } |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2070 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2071 | /* If a timeout was specified, set ms_end to be the end millisecond |
| 2072 | counter [wallclock] time. */ |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2073 | if (timeout) { |
| 2074 | res = my_do_syscall2(__NR_gettimeofday, (int)&t_now, (int)NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2075 | my_assert(res == 0); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2076 | ms_end = ms_now; |
| 2077 | ms_end += (timeout->tv_usec / 1000); |
| 2078 | ms_end += (timeout->tv_sec * 1000); |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2079 | /* Stay sane ... */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2080 | my_assert (ms_end >= ms_now); |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2081 | } |
| 2082 | |
| 2083 | /* fprintf(stderr, "MY_SELECT: before loop\n"); */ |
| 2084 | |
| 2085 | /* Either timeout == NULL, meaning wait indefinitely, or timeout != |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2086 | NULL, in which case ms_end holds the end time. */ |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2087 | |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2088 | while (1) { |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2089 | |
| 2090 | /* First, do a return-immediately select(). */ |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2091 | |
| 2092 | /* These could be trashed each time round the loop, so restore |
| 2093 | them each time. */ |
| 2094 | if (rfds) rfds_copy = *rfds; |
| 2095 | if (wfds) wfds_copy = *wfds; |
| 2096 | if (xfds) xfds_copy = *xfds; |
| 2097 | |
| 2098 | zero_timeout.tv_sec = zero_timeout.tv_usec = 0; |
| 2099 | |
| 2100 | res = do_syscall_select( n, |
| 2101 | rfds ? (vki_fd_set*)(&rfds_copy) : NULL, |
| 2102 | wfds ? (vki_fd_set*)(&wfds_copy) : NULL, |
| 2103 | xfds ? (vki_fd_set*)(&xfds_copy) : NULL, |
| 2104 | & zero_timeout ); |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2105 | if (is_kerror(res)) { |
| 2106 | /* Some kind of error (including EINTR). Set errno and |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2107 | return. The sets are unspecified in this case. */ |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2108 | * (__errno_location()) = -res; |
| 2109 | return -1; |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2110 | } |
| 2111 | if (res > 0) { |
| 2112 | /* one or more fds is ready. Copy out resulting sets and |
| 2113 | return. */ |
| 2114 | if (rfds) *rfds = rfds_copy; |
| 2115 | if (wfds) *wfds = wfds_copy; |
| 2116 | if (xfds) *xfds = xfds_copy; |
| 2117 | return res; |
| 2118 | } |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2119 | |
| 2120 | /* Nothing interesting happened, so we go to sleep for a |
| 2121 | while. */ |
| 2122 | |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2123 | /* fprintf(stderr, "MY_SELECT: nanosleep\n"); */ |
| 2124 | /* nanosleep and go round again */ |
sewardj | 02535bc | 2002-04-21 01:08:26 +0000 | [diff] [blame] | 2125 | nanosleep_interval.tv_sec = 0; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2126 | nanosleep_interval.tv_nsec = 11 * 1000 * 1000; /* 11 milliseconds */ |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2127 | /* It's critical here that valgrind's nanosleep implementation |
| 2128 | is nonblocking. */ |
sewardj | 645030e | 2002-06-06 01:27:39 +0000 | [diff] [blame] | 2129 | res = my_do_syscall2(__NR_nanosleep, |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2130 | (int)(&nanosleep_interval), (int)NULL); |
sewardj | 645030e | 2002-06-06 01:27:39 +0000 | [diff] [blame] | 2131 | if (res == -VKI_EINTR) { |
| 2132 | /* The nanosleep was interrupted by a signal. So we do the |
| 2133 | same. */ |
| 2134 | * (__errno_location()) = EINTR; |
| 2135 | return -1; |
| 2136 | } |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2137 | |
| 2138 | /* Sleeping finished. If a finite timeout, check to see if it |
| 2139 | has expired yet. */ |
| 2140 | if (timeout) { |
| 2141 | VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| 2142 | VG_USERREQ__READ_MILLISECOND_TIMER, |
| 2143 | 0, 0, 0, 0); |
| 2144 | my_assert(ms_now != 0xFFFFFFFF); |
| 2145 | if (ms_now >= ms_end) { |
| 2146 | /* timeout; nothing interesting happened. */ |
| 2147 | if (rfds) FD_ZERO(rfds); |
| 2148 | if (wfds) FD_ZERO(wfds); |
| 2149 | if (xfds) FD_ZERO(xfds); |
| 2150 | return 0; |
| 2151 | } |
| 2152 | } |
| 2153 | |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2154 | } |
| 2155 | } |
| 2156 | |
| 2157 | |
| 2158 | |
| 2159 | |
| 2160 | #include <sys/poll.h> |
| 2161 | |
sewardj | 3e909ce | 2002-06-03 13:27:15 +0000 | [diff] [blame] | 2162 | #ifndef HAVE_NFDS_T |
sewardj | 72d5848 | 2002-04-24 02:20:20 +0000 | [diff] [blame] | 2163 | typedef unsigned long int nfds_t; |
| 2164 | #endif |
| 2165 | |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 2166 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2167 | /* __attribute__((weak)) */ |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2168 | int poll (struct pollfd *__fds, nfds_t __nfds, int __timeout) |
| 2169 | { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2170 | unsigned int ms_now, ms_end; |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2171 | int res, i; |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2172 | struct vki_timespec nanosleep_interval; |
| 2173 | |
sewardj | d140e44 | 2002-05-29 01:21:19 +0000 | [diff] [blame] | 2174 | __my_pthread_testcancel(); |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2175 | ensure_valgrind("poll"); |
| 2176 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2177 | /* Detect the current time and simultaneously find out if we are |
| 2178 | running on Valgrind. */ |
| 2179 | VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| 2180 | VG_USERREQ__READ_MILLISECOND_TIMER, |
| 2181 | 0, 0, 0, 0); |
| 2182 | |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2183 | if (/* CHECK SIZES FOR struct pollfd */ |
| 2184 | sizeof(struct timeval) != sizeof(struct vki_timeval)) |
| 2185 | barf("valgrind's hacky non-blocking poll(): data sizes error"); |
| 2186 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2187 | /* dummy initialisation to keep gcc -Wall happy */ |
| 2188 | ms_end = 0; |
| 2189 | |
| 2190 | /* If a zero timeout specified, this call is harmless. Also do |
| 2191 | this if not running on Valgrind. */ |
| 2192 | if (__timeout == 0 || ms_now == 0xFFFFFFFF) { |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2193 | res = my_do_syscall3(__NR_poll, (int)__fds, __nfds, __timeout); |
| 2194 | if (is_kerror(res)) { |
| 2195 | * (__errno_location()) = -res; |
| 2196 | return -1; |
| 2197 | } else { |
| 2198 | return res; |
| 2199 | } |
| 2200 | } |
| 2201 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2202 | /* If a timeout was specified, set ms_end to be the end wallclock |
| 2203 | time. Easy considering that __timeout is in milliseconds. */ |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2204 | if (__timeout > 0) { |
sewardj | 650ac00 | 2002-04-29 12:20:34 +0000 | [diff] [blame] | 2205 | ms_end = ms_now + (unsigned int)__timeout; |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2206 | } |
| 2207 | |
| 2208 | /* fprintf(stderr, "MY_POLL: before loop\n"); */ |
| 2209 | |
| 2210 | /* Either timeout < 0, meaning wait indefinitely, or timeout > 0, |
| 2211 | in which case t_end holds the end time. */ |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2212 | |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2213 | my_assert(__timeout != 0); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2214 | |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2215 | while (1) { |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2216 | |
| 2217 | /* Do a return-immediately poll. */ |
| 2218 | |
| 2219 | res = my_do_syscall3(__NR_poll, (int)__fds, __nfds, 0 ); |
| 2220 | if (is_kerror(res)) { |
| 2221 | /* Some kind of error. Set errno and return. */ |
| 2222 | * (__errno_location()) = -res; |
| 2223 | return -1; |
| 2224 | } |
| 2225 | if (res > 0) { |
| 2226 | /* One or more fds is ready. Return now. */ |
| 2227 | return res; |
| 2228 | } |
| 2229 | |
| 2230 | /* Nothing interesting happened, so we go to sleep for a |
| 2231 | while. */ |
| 2232 | |
| 2233 | /* fprintf(stderr, "MY_POLL: nanosleep\n"); */ |
| 2234 | /* nanosleep and go round again */ |
| 2235 | nanosleep_interval.tv_sec = 0; |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2236 | nanosleep_interval.tv_nsec = 13 * 1000 * 1000; /* 13 milliseconds */ |
sewardj | 05bb2c9 | 2002-06-26 00:47:17 +0000 | [diff] [blame] | 2237 | /* It's critical here that valgrind's nanosleep implementation |
| 2238 | is nonblocking. */ |
| 2239 | (void)my_do_syscall2(__NR_nanosleep, |
| 2240 | (int)(&nanosleep_interval), (int)NULL); |
| 2241 | |
| 2242 | /* Sleeping finished. If a finite timeout, check to see if it |
| 2243 | has expired yet. */ |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2244 | if (__timeout > 0) { |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2245 | VALGRIND_MAGIC_SEQUENCE(ms_now, 0xFFFFFFFF /* default */, |
| 2246 | VG_USERREQ__READ_MILLISECOND_TIMER, |
| 2247 | 0, 0, 0, 0); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2248 | my_assert(ms_now != 0xFFFFFFFF); |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 2249 | if (ms_now >= ms_end) { |
sewardj | f854f47 | 2002-04-21 12:19:41 +0000 | [diff] [blame] | 2250 | /* timeout; nothing interesting happened. */ |
| 2251 | for (i = 0; i < __nfds; i++) |
| 2252 | __fds[i].revents = 0; |
| 2253 | return 0; |
| 2254 | } |
| 2255 | } |
| 2256 | |
sewardj | 08a4c3f | 2002-04-13 03:45:44 +0000 | [diff] [blame] | 2257 | } |
| 2258 | } |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2259 | |
| 2260 | |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 2261 | /* Helper function used to make accept() non-blocking. Idea is to use |
| 2262 | the above nonblocking poll() to make this thread ONLY wait for the |
| 2263 | specified fd to become ready, and then return. */ |
sewardj | d1c1cf2 | 2002-06-26 00:13:36 +0000 | [diff] [blame] | 2264 | |
| 2265 | /* Sigh -- a hack. We're not supposed to include this file directly; |
| 2266 | should do it via /usr/include/fcntl.h, but that introduces a |
| 2267 | varargs prototype for fcntl itself, which we can't mimic. */ |
| 2268 | #define _FCNTL_H |
| 2269 | #include <bits/fcntl.h> |
| 2270 | |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 2271 | static void wait_for_fd_to_be_readable_or_erring ( int fd ) |
| 2272 | { |
| 2273 | struct pollfd pfd; |
sewardj | d1c1cf2 | 2002-06-26 00:13:36 +0000 | [diff] [blame] | 2274 | int res; |
| 2275 | |
sewardj | 6e6cbaa | 2002-05-24 02:12:52 +0000 | [diff] [blame] | 2276 | /* fprintf(stderr, "wait_for_fd_to_be_readable_or_erring %d\n", fd); */ |
sewardj | d1c1cf2 | 2002-06-26 00:13:36 +0000 | [diff] [blame] | 2277 | |
| 2278 | /* First check to see if the fd is nonblocking, and/or invalid. In |
| 2279 | either case return immediately. */ |
| 2280 | res = __libc_fcntl(fd, F_GETFL, 0); |
| 2281 | if (res == -1) return; /* fd is invalid somehow */ |
| 2282 | if (res & O_NONBLOCK) return; /* fd is nonblocking */ |
| 2283 | |
| 2284 | /* Ok, we'd better wait with poll. */ |
sewardj | 705d3cb | 2002-05-23 13:13:12 +0000 | [diff] [blame] | 2285 | pfd.fd = fd; |
| 2286 | pfd.events = POLLIN | POLLPRI | POLLERR | POLLHUP | POLLNVAL; |
| 2287 | /* ... but not POLLOUT, you may notice. */ |
| 2288 | pfd.revents = 0; |
| 2289 | (void)poll(&pfd, 1, -1 /* forever */); |
| 2290 | } |
| 2291 | |
| 2292 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2293 | /* --------------------------------------------------------------------- |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2294 | Hacky implementation of semaphores. |
| 2295 | ------------------------------------------------------------------ */ |
| 2296 | |
| 2297 | #include <semaphore.h> |
| 2298 | |
| 2299 | /* This is a terrible way to do the remapping. Plan is to import an |
| 2300 | AVL tree at some point. */ |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2301 | |
| 2302 | typedef |
| 2303 | struct { |
| 2304 | pthread_mutex_t se_mx; |
| 2305 | pthread_cond_t se_cv; |
| 2306 | int count; |
| 2307 | } |
| 2308 | vg_sem_t; |
| 2309 | |
| 2310 | static pthread_mutex_t se_remap_mx = PTHREAD_MUTEX_INITIALIZER; |
| 2311 | |
| 2312 | static int se_remap_used = 0; |
| 2313 | static sem_t* se_remap_orig[VG_N_SEMAPHORES]; |
| 2314 | static vg_sem_t se_remap_new[VG_N_SEMAPHORES]; |
| 2315 | |
| 2316 | static vg_sem_t* se_remap ( sem_t* orig ) |
| 2317 | { |
| 2318 | int res, i; |
| 2319 | res = __pthread_mutex_lock(&se_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2320 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2321 | |
| 2322 | for (i = 0; i < se_remap_used; i++) { |
| 2323 | if (se_remap_orig[i] == orig) |
| 2324 | break; |
| 2325 | } |
| 2326 | if (i == se_remap_used) { |
| 2327 | if (se_remap_used == VG_N_SEMAPHORES) { |
| 2328 | res = pthread_mutex_unlock(&se_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2329 | my_assert(res == 0); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2330 | barf("VG_N_SEMAPHORES is too low. Increase and recompile."); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2331 | } |
| 2332 | se_remap_used++; |
| 2333 | se_remap_orig[i] = orig; |
| 2334 | /* printf("allocated semaphore %d\n", i); */ |
| 2335 | } |
| 2336 | res = __pthread_mutex_unlock(&se_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2337 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2338 | return &se_remap_new[i]; |
| 2339 | } |
| 2340 | |
| 2341 | |
| 2342 | int sem_init(sem_t *sem, int pshared, unsigned int value) |
| 2343 | { |
| 2344 | int res; |
| 2345 | vg_sem_t* vg_sem; |
| 2346 | ensure_valgrind("sem_init"); |
| 2347 | if (pshared != 0) { |
sewardj | 4dced35 | 2002-06-04 22:54:20 +0000 | [diff] [blame] | 2348 | pthread_error("sem_init: unsupported pshared value"); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2349 | errno = ENOSYS; |
| 2350 | return -1; |
| 2351 | } |
| 2352 | vg_sem = se_remap(sem); |
| 2353 | res = pthread_mutex_init(&vg_sem->se_mx, NULL); |
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 | res = pthread_cond_init(&vg_sem->se_cv, NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2356 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2357 | vg_sem->count = value; |
| 2358 | return 0; |
| 2359 | } |
| 2360 | |
| 2361 | |
| 2362 | int sem_wait ( sem_t* sem ) |
| 2363 | { |
| 2364 | int res; |
| 2365 | vg_sem_t* vg_sem; |
| 2366 | ensure_valgrind("sem_wait"); |
| 2367 | vg_sem = se_remap(sem); |
| 2368 | res = __pthread_mutex_lock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2369 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2370 | while (vg_sem->count == 0) { |
| 2371 | res = pthread_cond_wait(&vg_sem->se_cv, &vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2372 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2373 | } |
| 2374 | vg_sem->count--; |
| 2375 | res = __pthread_mutex_unlock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2376 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2377 | return 0; |
| 2378 | } |
| 2379 | |
| 2380 | int sem_post ( sem_t* sem ) |
| 2381 | { |
| 2382 | int res; |
| 2383 | vg_sem_t* vg_sem; |
| 2384 | ensure_valgrind("sem_post"); |
| 2385 | vg_sem = se_remap(sem); |
| 2386 | res = __pthread_mutex_lock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2387 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2388 | if (vg_sem->count == 0) { |
| 2389 | vg_sem->count++; |
| 2390 | res = pthread_cond_broadcast(&vg_sem->se_cv); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2391 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2392 | } else { |
| 2393 | vg_sem->count++; |
| 2394 | } |
| 2395 | res = __pthread_mutex_unlock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2396 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2397 | return 0; |
| 2398 | } |
| 2399 | |
| 2400 | |
| 2401 | int sem_trywait ( sem_t* sem ) |
| 2402 | { |
| 2403 | int ret, res; |
| 2404 | vg_sem_t* vg_sem; |
| 2405 | ensure_valgrind("sem_trywait"); |
| 2406 | vg_sem = se_remap(sem); |
| 2407 | res = __pthread_mutex_lock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2408 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2409 | if (vg_sem->count > 0) { |
| 2410 | vg_sem->count--; |
| 2411 | ret = 0; |
| 2412 | } else { |
| 2413 | ret = -1; |
| 2414 | errno = EAGAIN; |
| 2415 | } |
| 2416 | res = __pthread_mutex_unlock(&vg_sem->se_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2417 | my_assert(res == 0); |
sewardj | 8f253ff | 2002-05-19 00:13:34 +0000 | [diff] [blame] | 2418 | return ret; |
| 2419 | } |
| 2420 | |
| 2421 | |
| 2422 | int sem_getvalue(sem_t* sem, int * sval) |
| 2423 | { |
| 2424 | vg_sem_t* vg_sem; |
| 2425 | ensure_valgrind("sem_trywait"); |
| 2426 | vg_sem = se_remap(sem); |
| 2427 | *sval = vg_sem->count; |
| 2428 | return 0; |
| 2429 | } |
| 2430 | |
| 2431 | |
| 2432 | int sem_destroy(sem_t * sem) |
| 2433 | { |
| 2434 | kludged("sem_destroy"); |
| 2435 | /* if someone waiting on this semaphore, errno = EBUSY, return -1 */ |
| 2436 | return 0; |
| 2437 | } |
| 2438 | |
| 2439 | |
| 2440 | /* --------------------------------------------------------------------- |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2441 | Reader-writer locks. |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2442 | ------------------------------------------------------------------ */ |
| 2443 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2444 | typedef |
| 2445 | struct { |
| 2446 | int initted; /* != 0 --> in use; sanity check only */ |
| 2447 | int prefer_w; /* != 0 --> prefer writer */ |
| 2448 | int nwait_r; /* # of waiting readers */ |
| 2449 | int nwait_w; /* # of waiting writers */ |
| 2450 | pthread_cond_t cv_r; /* for signalling readers */ |
| 2451 | pthread_cond_t cv_w; /* for signalling writers */ |
| 2452 | pthread_mutex_t mx; |
| 2453 | int status; |
| 2454 | /* allowed range for status: >= -1. -1 means 1 writer currently |
| 2455 | active, >= 0 means N readers currently active. */ |
| 2456 | } |
| 2457 | vg_rwlock_t; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2458 | |
| 2459 | |
| 2460 | static pthread_mutex_t rw_remap_mx = PTHREAD_MUTEX_INITIALIZER; |
| 2461 | |
| 2462 | static int rw_remap_used = 0; |
| 2463 | static pthread_rwlock_t* rw_remap_orig[VG_N_RWLOCKS]; |
| 2464 | static vg_rwlock_t rw_remap_new[VG_N_RWLOCKS]; |
| 2465 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2466 | |
| 2467 | static |
| 2468 | void init_vg_rwlock ( vg_rwlock_t* vg_rwl ) |
| 2469 | { |
| 2470 | int res = 0; |
| 2471 | vg_rwl->initted = 1; |
| 2472 | vg_rwl->prefer_w = 1; |
| 2473 | vg_rwl->nwait_r = 0; |
| 2474 | vg_rwl->nwait_w = 0; |
| 2475 | vg_rwl->status = 0; |
| 2476 | res = pthread_mutex_init(&vg_rwl->mx, NULL); |
| 2477 | res |= pthread_cond_init(&vg_rwl->cv_r, NULL); |
| 2478 | res |= pthread_cond_init(&vg_rwl->cv_w, NULL); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2479 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2480 | } |
| 2481 | |
| 2482 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2483 | /* Take the address of a LinuxThreads rwlock_t and return the shadow |
| 2484 | address of our version. Further, if the LinuxThreads version |
| 2485 | appears to have been statically initialised, do the same to the one |
| 2486 | we allocate here. The pthread_rwlock_t.__rw_readers field is set |
| 2487 | to zero by PTHREAD_RWLOCK_INITIALIZER, so we take zero as meaning |
| 2488 | uninitialised and non-zero meaning initialised. |
| 2489 | */ |
| 2490 | static vg_rwlock_t* rw_remap ( pthread_rwlock_t* orig ) |
| 2491 | { |
| 2492 | int res, i; |
| 2493 | vg_rwlock_t* vg_rwl; |
| 2494 | res = __pthread_mutex_lock(&rw_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2495 | my_assert(res == 0); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2496 | |
| 2497 | for (i = 0; i < rw_remap_used; i++) { |
| 2498 | if (rw_remap_orig[i] == orig) |
| 2499 | break; |
| 2500 | } |
| 2501 | if (i == rw_remap_used) { |
| 2502 | if (rw_remap_used == VG_N_RWLOCKS) { |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2503 | res = __pthread_mutex_unlock(&rw_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2504 | my_assert(res == 0); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2505 | barf("VG_N_RWLOCKS is too low. Increase and recompile."); |
| 2506 | } |
| 2507 | rw_remap_used++; |
| 2508 | rw_remap_orig[i] = orig; |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2509 | rw_remap_new[i].initted = 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2510 | if (0) printf("allocated rwlock %d\n", i); |
| 2511 | } |
| 2512 | res = __pthread_mutex_unlock(&rw_remap_mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2513 | my_assert(res == 0); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2514 | vg_rwl = &rw_remap_new[i]; |
| 2515 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2516 | /* Initialise the shadow, if required. */ |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2517 | if (orig->__rw_readers == 0) { |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2518 | orig->__rw_readers = 1; |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2519 | init_vg_rwlock(vg_rwl); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2520 | if (orig->__rw_kind == PTHREAD_RWLOCK_PREFER_READER_NP) |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2521 | vg_rwl->prefer_w = 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2522 | } |
| 2523 | |
| 2524 | return vg_rwl; |
| 2525 | } |
| 2526 | |
| 2527 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2528 | int pthread_rwlock_init ( pthread_rwlock_t* orig, |
| 2529 | const pthread_rwlockattr_t* attr ) |
| 2530 | { |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2531 | vg_rwlock_t* rwl; |
| 2532 | if (0) printf ("pthread_rwlock_init\n"); |
| 2533 | /* Force the remapper to initialise the shadow. */ |
| 2534 | orig->__rw_readers = 0; |
| 2535 | /* Install the lock preference; the remapper needs to know it. */ |
| 2536 | orig->__rw_kind = PTHREAD_RWLOCK_DEFAULT_NP; |
| 2537 | if (attr) |
| 2538 | orig->__rw_kind = attr->__lockkind; |
| 2539 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2540 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2541 | } |
| 2542 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2543 | |
| 2544 | static |
| 2545 | void pthread_rwlock_rdlock_CANCEL_HDLR ( void* rwl_v ) |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2546 | { |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2547 | vg_rwlock_t* rwl = (vg_rwlock_t*)rwl_v; |
| 2548 | rwl->nwait_r--; |
| 2549 | pthread_mutex_unlock (&rwl->mx); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2550 | } |
| 2551 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2552 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2553 | int pthread_rwlock_rdlock ( pthread_rwlock_t* orig ) |
| 2554 | { |
| 2555 | int res; |
| 2556 | vg_rwlock_t* rwl; |
| 2557 | if (0) printf ("pthread_rwlock_rdlock\n"); |
| 2558 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2559 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2560 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2561 | if (!rwl->initted) { |
| 2562 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2563 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2564 | return EINVAL; |
| 2565 | } |
| 2566 | if (rwl->status < 0) { |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2567 | my_assert(rwl->status == -1); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2568 | rwl->nwait_r++; |
| 2569 | pthread_cleanup_push( pthread_rwlock_rdlock_CANCEL_HDLR, rwl ); |
| 2570 | while (1) { |
| 2571 | if (rwl->status == 0) break; |
| 2572 | res = pthread_cond_wait(&rwl->cv_r, &rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2573 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2574 | } |
| 2575 | pthread_cleanup_pop(0); |
| 2576 | rwl->nwait_r--; |
| 2577 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2578 | my_assert(rwl->status >= 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2579 | rwl->status++; |
| 2580 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2581 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2582 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2583 | } |
| 2584 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2585 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2586 | int pthread_rwlock_tryrdlock ( pthread_rwlock_t* orig ) |
| 2587 | { |
| 2588 | int res; |
| 2589 | vg_rwlock_t* rwl; |
| 2590 | if (0) printf ("pthread_rwlock_tryrdlock\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 == -1) { |
| 2600 | /* Writer active; we have to give up. */ |
| 2601 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2602 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2603 | return EBUSY; |
| 2604 | } |
| 2605 | /* Success */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2606 | my_assert(rwl->status >= 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2607 | rwl->status++; |
| 2608 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2609 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2610 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2611 | } |
| 2612 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2613 | |
| 2614 | static |
| 2615 | void pthread_rwlock_wrlock_CANCEL_HDLR ( void* rwl_v ) |
| 2616 | { |
| 2617 | vg_rwlock_t* rwl = (vg_rwlock_t*)rwl_v; |
| 2618 | rwl->nwait_w--; |
| 2619 | pthread_mutex_unlock (&rwl->mx); |
| 2620 | } |
| 2621 | |
| 2622 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2623 | int pthread_rwlock_wrlock ( pthread_rwlock_t* orig ) |
| 2624 | { |
| 2625 | int res; |
| 2626 | vg_rwlock_t* rwl; |
| 2627 | if (0) printf ("pthread_rwlock_wrlock\n"); |
| 2628 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2629 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2630 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2631 | if (!rwl->initted) { |
| 2632 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2633 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2634 | return EINVAL; |
| 2635 | } |
| 2636 | if (rwl->status != 0) { |
| 2637 | rwl->nwait_w++; |
| 2638 | pthread_cleanup_push( pthread_rwlock_wrlock_CANCEL_HDLR, rwl ); |
| 2639 | while (1) { |
| 2640 | if (rwl->status == 0) break; |
| 2641 | res = pthread_cond_wait(&rwl->cv_w, &rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2642 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2643 | } |
| 2644 | pthread_cleanup_pop(0); |
| 2645 | rwl->nwait_w--; |
| 2646 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2647 | my_assert(rwl->status == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2648 | rwl->status = -1; |
| 2649 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2650 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2651 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2652 | } |
| 2653 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2654 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2655 | int pthread_rwlock_trywrlock ( pthread_rwlock_t* orig ) |
| 2656 | { |
| 2657 | int res; |
| 2658 | vg_rwlock_t* rwl; |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2659 | if (0) printf ("pthread_wrlock_trywrlock\n"); |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2660 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2661 | res = __pthread_mutex_lock(&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 | if (!rwl->initted) { |
| 2664 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2665 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2666 | return EINVAL; |
| 2667 | } |
| 2668 | if (rwl->status != 0) { |
| 2669 | /* Reader(s) or a writer active; we have to give up. */ |
| 2670 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2671 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2672 | return EBUSY; |
| 2673 | } |
| 2674 | /* Success */ |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2675 | my_assert(rwl->status == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2676 | rwl->status = -1; |
| 2677 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2678 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2679 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2680 | } |
| 2681 | |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2682 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2683 | int pthread_rwlock_unlock ( pthread_rwlock_t* orig ) |
| 2684 | { |
| 2685 | int res; |
| 2686 | vg_rwlock_t* rwl; |
| 2687 | if (0) printf ("pthread_rwlock_unlock\n"); |
| 2688 | rwl = rw_remap ( orig ); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2689 | rwl = rw_remap ( orig ); |
| 2690 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2691 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2692 | if (!rwl->initted) { |
| 2693 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2694 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2695 | return EINVAL; |
| 2696 | } |
| 2697 | if (rwl->status == 0) { |
| 2698 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2699 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2700 | return EPERM; |
| 2701 | } |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2702 | my_assert(rwl->status != 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2703 | if (rwl->status == -1) { |
| 2704 | rwl->status = 0; |
| 2705 | } else { |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2706 | my_assert(rwl->status > 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2707 | rwl->status--; |
| 2708 | } |
| 2709 | |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2710 | my_assert(rwl->status >= 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2711 | |
| 2712 | if (rwl->prefer_w) { |
| 2713 | |
| 2714 | /* Favour waiting writers, if any. */ |
| 2715 | if (rwl->nwait_w > 0) { |
| 2716 | /* Writer(s) are waiting. */ |
| 2717 | if (rwl->status == 0) { |
| 2718 | /* We can let a writer in. */ |
| 2719 | res = pthread_cond_signal(&rwl->cv_w); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2720 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2721 | } else { |
| 2722 | /* There are still readers active. Do nothing; eventually |
| 2723 | they will disappear, at which point a writer will be |
| 2724 | admitted. */ |
| 2725 | } |
| 2726 | } |
| 2727 | else |
| 2728 | /* No waiting writers. */ |
| 2729 | if (rwl->nwait_r > 0) { |
| 2730 | /* Let in a waiting reader. */ |
| 2731 | res = pthread_cond_signal(&rwl->cv_r); |
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 | } |
| 2734 | |
| 2735 | } else { |
| 2736 | |
| 2737 | /* Favour waiting readers, if any. */ |
| 2738 | if (rwl->nwait_r > 0) { |
| 2739 | /* Reader(s) are waiting; let one in. */ |
| 2740 | res = pthread_cond_signal(&rwl->cv_r); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2741 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2742 | } |
| 2743 | else |
| 2744 | /* No waiting readers. */ |
| 2745 | if (rwl->nwait_w > 0 && rwl->status == 0) { |
| 2746 | /* We have waiting writers and no active readers; let a |
| 2747 | writer in. */ |
| 2748 | res = pthread_cond_signal(&rwl->cv_w); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2749 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2750 | } |
| 2751 | } |
| 2752 | |
| 2753 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2754 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2755 | return 0; |
| 2756 | } |
| 2757 | |
| 2758 | |
| 2759 | int pthread_rwlock_destroy ( pthread_rwlock_t *orig ) |
| 2760 | { |
| 2761 | int res; |
| 2762 | vg_rwlock_t* rwl; |
| 2763 | if (0) printf ("pthread_rwlock_destroy\n"); |
| 2764 | rwl = rw_remap ( orig ); |
| 2765 | res = __pthread_mutex_lock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2766 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2767 | if (!rwl->initted) { |
| 2768 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2769 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2770 | return EINVAL; |
| 2771 | } |
| 2772 | if (rwl->status != 0 || rwl->nwait_r > 0 || rwl->nwait_w > 0) { |
| 2773 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2774 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2775 | return EBUSY; |
| 2776 | } |
| 2777 | rwl->initted = 0; |
| 2778 | res = __pthread_mutex_unlock(&rwl->mx); |
sewardj | 2d94c11 | 2002-06-03 01:25:54 +0000 | [diff] [blame] | 2779 | my_assert(res == 0); |
sewardj | 2d8b3f0 | 2002-06-01 14:14:19 +0000 | [diff] [blame] | 2780 | return 0; |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2781 | } |
| 2782 | |
| 2783 | |
sewardj | 47e4e31 | 2002-06-18 09:24:34 +0000 | [diff] [blame] | 2784 | /* Copied directly from LinuxThreads. */ |
| 2785 | int |
| 2786 | pthread_rwlockattr_init (pthread_rwlockattr_t *attr) |
| 2787 | { |
| 2788 | attr->__lockkind = 0; |
| 2789 | attr->__pshared = PTHREAD_PROCESS_PRIVATE; |
| 2790 | |
| 2791 | return 0; |
| 2792 | } |
| 2793 | |
sewardj | fe18eb8 | 2002-07-13 12:58:44 +0000 | [diff] [blame] | 2794 | /* Copied directly from LinuxThreads. */ |
| 2795 | int |
| 2796 | pthread_rwlockattr_setpshared (pthread_rwlockattr_t *attr, int pshared) |
| 2797 | { |
| 2798 | if (pshared != PTHREAD_PROCESS_PRIVATE && pshared != PTHREAD_PROCESS_SHARED) |
| 2799 | return EINVAL; |
| 2800 | |
| 2801 | /* For now it is not possible to shared a conditional variable. */ |
| 2802 | if (pshared != PTHREAD_PROCESS_PRIVATE) |
| 2803 | return ENOSYS; |
| 2804 | |
| 2805 | attr->__pshared = pshared; |
| 2806 | |
| 2807 | return 0; |
| 2808 | } |
| 2809 | |
sewardj | 47e4e31 | 2002-06-18 09:24:34 +0000 | [diff] [blame] | 2810 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2811 | /* --------------------------------------------------------------------- |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2812 | B'stard. |
| 2813 | ------------------------------------------------------------------ */ |
| 2814 | |
| 2815 | # define strong_alias(name, aliasname) \ |
| 2816 | extern __typeof (name) aliasname __attribute__ ((alias (#name))); |
| 2817 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2818 | # define weak_alias(name, aliasname) \ |
| 2819 | extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2820 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2821 | strong_alias(__pthread_mutex_lock, pthread_mutex_lock) |
| 2822 | strong_alias(__pthread_mutex_trylock, pthread_mutex_trylock) |
| 2823 | strong_alias(__pthread_mutex_unlock, pthread_mutex_unlock) |
| 2824 | strong_alias(__pthread_mutexattr_init, pthread_mutexattr_init) |
| 2825 | weak_alias(__pthread_mutexattr_settype, pthread_mutexattr_settype) |
| 2826 | strong_alias(__pthread_mutex_init, pthread_mutex_init) |
| 2827 | strong_alias(__pthread_mutexattr_destroy, pthread_mutexattr_destroy) |
| 2828 | strong_alias(__pthread_mutex_destroy, pthread_mutex_destroy) |
| 2829 | strong_alias(__pthread_once, pthread_once) |
| 2830 | strong_alias(__pthread_atfork, pthread_atfork) |
| 2831 | strong_alias(__pthread_key_create, pthread_key_create) |
| 2832 | strong_alias(__pthread_getspecific, pthread_getspecific) |
| 2833 | strong_alias(__pthread_setspecific, pthread_setspecific) |
| 2834 | |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 2835 | #ifndef GLIBC_2_1 |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2836 | strong_alias(sigaction, __sigaction) |
sewardj | d529a44 | 2002-05-04 19:49:21 +0000 | [diff] [blame] | 2837 | #endif |
| 2838 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2839 | strong_alias(close, __close) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2840 | strong_alias(fcntl, __fcntl) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2841 | strong_alias(lseek, __lseek) |
| 2842 | strong_alias(open, __open) |
| 2843 | strong_alias(open64, __open64) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2844 | strong_alias(read, __read) |
| 2845 | strong_alias(wait, __wait) |
| 2846 | strong_alias(write, __write) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2847 | strong_alias(connect, __connect) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2848 | strong_alias(send, __send) |
| 2849 | |
sewardj | 726c412 | 2002-05-16 23:39:10 +0000 | [diff] [blame] | 2850 | weak_alias (__pread64, pread64) |
sewardj | a18e210 | 2002-05-18 10:43:22 +0000 | [diff] [blame] | 2851 | weak_alias (__pwrite64, pwrite64) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2852 | weak_alias(__fork, fork) |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 2853 | weak_alias(__vfork, vfork) |
sewardj | 7f6456d | 2002-05-21 00:51:21 +0000 | [diff] [blame] | 2854 | |
sewardj | f0b0645 | 2002-06-04 08:38:04 +0000 | [diff] [blame] | 2855 | weak_alias (__pthread_kill_other_threads_np, pthread_kill_other_threads_np) |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2856 | |
| 2857 | /*--------------------------------------------------*/ |
| 2858 | |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2859 | weak_alias(pthread_rwlock_rdlock, __pthread_rwlock_rdlock) |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2860 | weak_alias(pthread_rwlock_unlock, __pthread_rwlock_unlock) |
sewardj | 262b029 | 2002-05-01 00:03:16 +0000 | [diff] [blame] | 2861 | weak_alias(pthread_rwlock_wrlock, __pthread_rwlock_wrlock) |
sewardj | 060b04f | 2002-04-26 21:01:13 +0000 | [diff] [blame] | 2862 | |
sewardj | a1ac5cb | 2002-05-27 13:00:05 +0000 | [diff] [blame] | 2863 | weak_alias(pthread_rwlock_destroy, __pthread_rwlock_destroy) |
| 2864 | weak_alias(pthread_rwlock_init, __pthread_rwlock_init) |
| 2865 | weak_alias(pthread_rwlock_tryrdlock, __pthread_rwlock_tryrdlock) |
| 2866 | weak_alias(pthread_rwlock_trywrlock, __pthread_rwlock_trywrlock) |
| 2867 | |
sewardj | 060b04f | 2002-04-26 21:01:13 +0000 | [diff] [blame] | 2868 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2869 | /* I've no idea what these are, but they get called quite a lot. |
| 2870 | Anybody know? */ |
| 2871 | |
| 2872 | #undef _IO_flockfile |
| 2873 | void _IO_flockfile ( _IO_FILE * file ) |
| 2874 | { |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 2875 | pthread_mutex_lock(file->_lock); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2876 | } |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2877 | weak_alias(_IO_flockfile, flockfile); |
| 2878 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2879 | |
| 2880 | #undef _IO_funlockfile |
| 2881 | void _IO_funlockfile ( _IO_FILE * file ) |
| 2882 | { |
sewardj | 853f55d | 2002-04-26 00:27:53 +0000 | [diff] [blame] | 2883 | pthread_mutex_unlock(file->_lock); |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2884 | } |
sewardj | 5905fae | 2002-04-26 13:25:00 +0000 | [diff] [blame] | 2885 | weak_alias(_IO_funlockfile, funlockfile); |
| 2886 | |
sewardj | 3b13f0e | 2002-04-25 20:17:29 +0000 | [diff] [blame] | 2887 | |
sewardj | d4f2c71 | 2002-04-30 10:20:10 +0000 | [diff] [blame] | 2888 | /* This doesn't seem to be needed to simulate libpthread.so's external |
| 2889 | interface, but many people complain about its absence. */ |
| 2890 | |
| 2891 | strong_alias(__pthread_mutexattr_settype, __pthread_mutexattr_setkind_np) |
| 2892 | weak_alias(__pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np) |
sewardj | 439d45e | 2002-05-03 20:43:10 +0000 | [diff] [blame] | 2893 | |
| 2894 | |
| 2895 | /*--------------------------------------------------------------------*/ |
| 2896 | /*--- end vg_libpthread.c ---*/ |
| 2897 | /*--------------------------------------------------------------------*/ |