sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 3 | /*--- Process-related libc stuff. m_libcproc.c ---*/ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 4 | /*--------------------------------------------------------------------*/ |
njn | ed6b824 | 2005-06-01 00:03:17 +0000 | [diff] [blame] | 5 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 6 | /* |
njn | b9c427c | 2004-12-01 14:14:42 +0000 | [diff] [blame] | 7 | This file is part of Valgrind, a dynamic binary instrumentation |
| 8 | framework. |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 9 | |
sewardj | 9eecbbb | 2010-05-03 21:37:12 +0000 | [diff] [blame] | 10 | Copyright (C) 2000-2010 Julian Seward |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 11 | jseward@acm.org |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 12 | |
| 13 | This program is free software; you can redistribute it and/or |
| 14 | modify it under the terms of the GNU General Public License as |
| 15 | published by the Free Software Foundation; either version 2 of the |
| 16 | License, or (at your option) any later version. |
| 17 | |
| 18 | This program is distributed in the hope that it will be useful, but |
| 19 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 21 | General Public License for more details. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License |
| 24 | along with this program; if not, write to the Free Software |
| 25 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 26 | 02111-1307, USA. |
| 27 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 28 | The GNU General Public License is contained in the file COPYING. |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 29 | */ |
| 30 | |
njn | c7561b9 | 2005-06-19 01:24:32 +0000 | [diff] [blame] | 31 | #include "pub_core_basics.h" |
sewardj | 4cfea4f | 2006-10-14 19:26:10 +0000 | [diff] [blame] | 32 | #include "pub_core_vki.h" |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 33 | #include "pub_core_vkiscnums.h" |
njn | 97405b2 | 2005-06-02 03:39:33 +0000 | [diff] [blame] | 34 | #include "pub_core_libcbase.h" |
njn | 132bfcc | 2005-06-04 19:16:06 +0000 | [diff] [blame] | 35 | #include "pub_core_libcassert.h" |
njn | 36a20fa | 2005-06-03 03:08:39 +0000 | [diff] [blame] | 36 | #include "pub_core_libcprint.h" |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 37 | #include "pub_core_libcproc.h" |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 38 | #include "pub_core_libcsignal.h" |
sewardj | d7a02db | 2008-12-12 08:07:49 +0000 | [diff] [blame] | 39 | #include "pub_core_seqmatch.h" |
njn | af1d7df | 2005-06-11 01:31:52 +0000 | [diff] [blame] | 40 | #include "pub_core_mallocfree.h" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 41 | #include "pub_core_syscall.h" |
sewardj | 14c7cc5 | 2007-02-25 15:08:24 +0000 | [diff] [blame] | 42 | #include "pub_core_xarray.h" |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 43 | #include "pub_core_clientstate.h" |
sewardj | 1cf558c | 2005-04-25 01:36:56 +0000 | [diff] [blame] | 44 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 45 | #if defined(VGO_darwin) |
| 46 | /* --- !!! --- EXTERNAL HEADERS start --- !!! --- */ |
| 47 | #include <mach/mach.h> /* mach_thread_self */ |
| 48 | /* --- !!! --- EXTERNAL HEADERS end --- !!! --- */ |
| 49 | #endif |
| 50 | |
| 51 | /* IMPORTANT: on Darwin it is essential to use the _nocancel versions |
| 52 | of syscalls rather than the vanilla version, if a _nocancel version |
| 53 | is available. See docs/internals/Darwin-notes.txt for the reason |
| 54 | why. */ |
| 55 | |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 56 | /* --------------------------------------------------------------------- |
| 57 | Command line and environment stuff |
| 58 | ------------------------------------------------------------------ */ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 59 | |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 60 | /* As deduced from sp_at_startup, the client's argc, argv[] and |
| 61 | envp[] as extracted from the client's stack at startup-time. */ |
sewardj | 198f34f | 2007-07-09 23:13:07 +0000 | [diff] [blame] | 62 | Char** VG_(client_envp) = NULL; |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 63 | |
njn | 8d9965c | 2005-06-12 17:47:24 +0000 | [diff] [blame] | 64 | /* Path to library directory */ |
| 65 | const Char *VG_(libdir) = VG_LIBDIR; |
| 66 | |
njn | e323a6b | 2010-07-01 02:35:03 +0000 | [diff] [blame] | 67 | const Char *VG_(LD_PRELOAD_var_name) = |
| 68 | #if defined(VGO_linux) || defined(VGO_aix5) |
| 69 | "LD_PRELOAD"; |
| 70 | #elif defined(VGO_darwin) |
| 71 | "DYLD_INSERT_LIBRARIES"; |
| 72 | #else |
| 73 | # error Unknown OS |
| 74 | #endif |
| 75 | |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 76 | /* We do getenv without libc's help by snooping around in |
| 77 | VG_(client_envp) as determined at startup time. */ |
| 78 | Char *VG_(getenv)(Char *varname) |
jsgf | 855d93d | 2003-10-13 22:26:55 +0000 | [diff] [blame] | 79 | { |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 80 | Int i, n; |
sewardj | 198f34f | 2007-07-09 23:13:07 +0000 | [diff] [blame] | 81 | vg_assert( VG_(client_envp) ); |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 82 | n = VG_(strlen)(varname); |
| 83 | for (i = 0; VG_(client_envp)[i] != NULL; i++) { |
| 84 | Char* s = VG_(client_envp)[i]; |
| 85 | if (VG_(strncmp)(varname, s, n) == 0 && s[n] == '=') { |
| 86 | return & s[n+1]; |
thughes | 8ef6d96 | 2004-10-16 10:46:01 +0000 | [diff] [blame] | 87 | } |
| 88 | } |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 89 | return NULL; |
nethercote | ff9721d | 2004-01-26 17:10:01 +0000 | [diff] [blame] | 90 | } |
| 91 | |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 92 | void VG_(env_unsetenv) ( Char **env, const Char *varname ) |
| 93 | { |
| 94 | Char **from; |
| 95 | Char **to = NULL; |
| 96 | Int len = VG_(strlen)(varname); |
| 97 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 98 | for (from = to = env; from && *from; from++) { |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 99 | if (!(VG_(strncmp)(varname, *from, len) == 0 && (*from)[len] == '=')) { |
| 100 | *to = *from; |
| 101 | to++; |
| 102 | } |
| 103 | } |
| 104 | *to = *from; |
| 105 | } |
| 106 | |
| 107 | /* set the environment; returns the old env if a new one was allocated */ |
| 108 | Char **VG_(env_setenv) ( Char ***envp, const Char* varname, const Char *val ) |
| 109 | { |
| 110 | Char **env = (*envp); |
| 111 | Char **cpp; |
| 112 | Int len = VG_(strlen)(varname); |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 113 | Char *valstr = VG_(arena_malloc)(VG_AR_CORE, "libcproc.es.1", |
| 114 | len + VG_(strlen)(val) + 2); |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 115 | Char **oldenv = NULL; |
| 116 | |
| 117 | VG_(sprintf)(valstr, "%s=%s", varname, val); |
| 118 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 119 | for (cpp = env; cpp && *cpp; cpp++) { |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 120 | if (VG_(strncmp)(varname, *cpp, len) == 0 && (*cpp)[len] == '=') { |
| 121 | *cpp = valstr; |
| 122 | return oldenv; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | if (env == NULL) { |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 127 | env = VG_(arena_malloc)(VG_AR_CORE, "libcproc.es.2", sizeof(Char **) * 2); |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 128 | env[0] = valstr; |
| 129 | env[1] = NULL; |
| 130 | |
| 131 | *envp = env; |
| 132 | |
| 133 | } else { |
| 134 | Int envlen = (cpp-env) + 2; |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 135 | Char **newenv = VG_(arena_malloc)(VG_AR_CORE, "libcproc.es.3", |
| 136 | envlen * sizeof(Char **)); |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 137 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 138 | for (cpp = newenv; *env; ) |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 139 | *cpp++ = *env++; |
| 140 | *cpp++ = valstr; |
| 141 | *cpp++ = NULL; |
| 142 | |
| 143 | oldenv = *envp; |
| 144 | |
| 145 | *envp = newenv; |
| 146 | } |
| 147 | |
| 148 | return oldenv; |
| 149 | } |
| 150 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 151 | |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 152 | /* Walk through a colon-separated environment variable, and remove the |
| 153 | entries which match remove_pattern. It slides everything down over |
| 154 | the removed entries, and pads the remaining space with '\0'. It |
| 155 | modifies the entries in place (in the client address space), but it |
| 156 | shouldn't matter too much, since we only do this just before an |
| 157 | execve(). |
| 158 | |
| 159 | This is also careful to mop up any excess ':'s, since empty strings |
| 160 | delimited by ':' are considered to be '.' in a path. |
| 161 | */ |
| 162 | static void mash_colon_env(Char *varp, const Char *remove_pattern) |
| 163 | { |
| 164 | Char *const start = varp; |
| 165 | Char *entry_start = varp; |
| 166 | Char *output = varp; |
| 167 | |
| 168 | if (varp == NULL) |
| 169 | return; |
| 170 | |
| 171 | while(*varp) { |
| 172 | if (*varp == ':') { |
| 173 | Char prev; |
| 174 | Bool match; |
| 175 | |
| 176 | /* This is a bit subtle: we want to match against the entry |
| 177 | we just copied, because it may have overlapped with |
| 178 | itself, junking the original. */ |
| 179 | |
| 180 | prev = *output; |
| 181 | *output = '\0'; |
| 182 | |
| 183 | match = VG_(string_match)(remove_pattern, entry_start); |
| 184 | |
| 185 | *output = prev; |
| 186 | |
| 187 | if (match) { |
| 188 | output = entry_start; |
| 189 | varp++; /* skip ':' after removed entry */ |
| 190 | } else |
| 191 | entry_start = output+1; /* entry starts after ':' */ |
| 192 | } |
| 193 | |
tom | 149ede9 | 2010-06-15 12:49:07 +0000 | [diff] [blame] | 194 | if (*varp) |
| 195 | *output++ = *varp++; |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 196 | } |
| 197 | |
tom | 149ede9 | 2010-06-15 12:49:07 +0000 | [diff] [blame] | 198 | /* make sure last entry is nul terminated */ |
| 199 | *output = '\0'; |
| 200 | |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 201 | /* match against the last entry */ |
| 202 | if (VG_(string_match)(remove_pattern, entry_start)) { |
| 203 | output = entry_start; |
| 204 | if (output > start) { |
| 205 | /* remove trailing ':' */ |
| 206 | output--; |
| 207 | vg_assert(*output == ':'); |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | /* pad out the left-overs with '\0' */ |
| 212 | while(output < varp) |
| 213 | *output++ = '\0'; |
| 214 | } |
| 215 | |
| 216 | |
| 217 | // Removes all the Valgrind-added stuff from the passed environment. Used |
| 218 | // when starting child processes, so they don't see that added stuff. |
| 219 | void VG_(env_remove_valgrind_env_stuff)(Char** envp) |
| 220 | { |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 221 | |
| 222 | #if defined(VGO_darwin) |
| 223 | |
| 224 | // Environment cleanup is also handled during parent launch |
| 225 | // in vg_preloaded.c:vg_cleanup_env(). |
| 226 | |
| 227 | #endif |
| 228 | |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 229 | Int i; |
| 230 | Char* ld_preload_str = NULL; |
| 231 | Char* ld_library_path_str = NULL; |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 232 | Char* dyld_insert_libraries_str = NULL; |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 233 | Char* buf; |
| 234 | |
| 235 | // Find LD_* variables |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 236 | // DDD: should probably conditionally compiled some of this: |
| 237 | // - LD_LIBRARY_PATH is universal? |
| 238 | // - LD_PRELOAD is on Linux, not on Darwin, not sure about AIX |
| 239 | // - DYLD_INSERT_LIBRARIES and DYLD_SHARED_REGION are Darwin-only |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 240 | for (i = 0; envp[i] != NULL; i++) { |
| 241 | if (VG_(strncmp)(envp[i], "LD_PRELOAD=", 11) == 0) |
| 242 | ld_preload_str = &envp[i][11]; |
| 243 | if (VG_(strncmp)(envp[i], "LD_LIBRARY_PATH=", 16) == 0) |
| 244 | ld_library_path_str = &envp[i][16]; |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 245 | if (VG_(strncmp)(envp[i], "DYLD_INSERT_LIBRARIES=", 22) == 0) |
| 246 | dyld_insert_libraries_str = &envp[i][22]; |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 247 | } |
| 248 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 249 | buf = VG_(arena_malloc)(VG_AR_CORE, "libcproc.erves.1", |
| 250 | VG_(strlen)(VG_(libdir)) + 20); |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 251 | |
| 252 | // Remove Valgrind-specific entries from LD_*. |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 253 | VG_(sprintf)(buf, "%s*/vgpreload_*.so", VG_(libdir)); |
| 254 | mash_colon_env(ld_preload_str, buf); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 255 | mash_colon_env(dyld_insert_libraries_str, buf); |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 256 | VG_(sprintf)(buf, "%s*", VG_(libdir)); |
| 257 | mash_colon_env(ld_library_path_str, buf); |
| 258 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 259 | // Remove VALGRIND_LAUNCHER variable. |
| 260 | VG_(env_unsetenv)(envp, VALGRIND_LAUNCHER); |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 261 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 262 | // Remove DYLD_SHARED_REGION variable. |
| 263 | VG_(env_unsetenv)(envp, "DYLD_SHARED_REGION"); |
| 264 | |
nethercote | 60a96c5 | 2004-08-03 13:08:31 +0000 | [diff] [blame] | 265 | // XXX if variable becomes empty, remove it completely? |
| 266 | |
| 267 | VG_(arena_free)(VG_AR_CORE, buf); |
| 268 | } |
| 269 | |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 270 | /* --------------------------------------------------------------------- |
| 271 | Various important syscall wrappers |
| 272 | ------------------------------------------------------------------ */ |
| 273 | |
| 274 | Int VG_(waitpid)(Int pid, Int *status, Int options) |
| 275 | { |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 276 | # if defined(VGO_linux) |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 277 | SysRes res = VG_(do_syscall4)(__NR_wait4, |
| 278 | pid, (UWord)status, options, 0); |
| 279 | return sr_isError(res) ? -1 : sr_Res(res); |
| 280 | # elif defined(VGO_darwin) |
| 281 | SysRes res = VG_(do_syscall4)(__NR_wait4_nocancel, |
| 282 | pid, (UWord)status, options, 0); |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 283 | return sr_isError(res) ? -1 : sr_Res(res); |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 284 | # elif defined(VGO_aix5) |
| 285 | /* magic number 4 obtained by truss-ing a C program doing |
| 286 | 'waitpid'. Note status and pid args opposite way round from |
| 287 | POSIX. */ |
| 288 | SysRes res = VG_(do_syscall5)(__NR_AIX5_kwaitpid, |
| 289 | (UWord)status, pid, 4 | options,0,0); |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 290 | if (0) VG_(printf)("waitpid: got 0x%lx 0x%lx\n", sr_Res(res), res.err); |
| 291 | return sr_isError(res) ? -1 : sr_Res(res); |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 292 | # else |
| 293 | # error Unknown OS |
| 294 | # endif |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 295 | } |
| 296 | |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 297 | /* clone the environment */ |
tom | 4e13695 | 2005-07-18 14:02:11 +0000 | [diff] [blame] | 298 | Char **VG_(env_clone) ( Char **oldenv ) |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 299 | { |
| 300 | Char **oldenvp; |
| 301 | Char **newenvp; |
| 302 | Char **newenv; |
| 303 | Int envlen; |
| 304 | |
| 305 | for (oldenvp = oldenv; oldenvp && *oldenvp; oldenvp++); |
| 306 | |
| 307 | envlen = oldenvp - oldenv + 1; |
| 308 | |
sewardj | 9c606bd | 2008-09-18 18:12:50 +0000 | [diff] [blame] | 309 | newenv = VG_(arena_malloc)(VG_AR_CORE, "libcproc.ec.1", |
| 310 | envlen * sizeof(Char **)); |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 311 | |
| 312 | oldenvp = oldenv; |
| 313 | newenvp = newenv; |
| 314 | |
| 315 | while (oldenvp && *oldenvp) { |
| 316 | *newenvp++ = *oldenvp++; |
| 317 | } |
| 318 | |
| 319 | *newenvp = *oldenvp; |
| 320 | |
| 321 | return newenv; |
| 322 | } |
| 323 | |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 324 | void VG_(execv) ( Char* filename, Char** argv ) |
| 325 | { |
| 326 | Char** envp; |
| 327 | SysRes res; |
| 328 | |
| 329 | /* restore the DATA rlimit for the child */ |
| 330 | VG_(setrlimit)(VKI_RLIMIT_DATA, &VG_(client_rlimit_data)); |
| 331 | |
| 332 | envp = VG_(env_clone)(VG_(client_envp)); |
| 333 | VG_(env_remove_valgrind_env_stuff)( envp ); |
| 334 | |
| 335 | res = VG_(do_syscall3)(__NR_execve, |
| 336 | (UWord)filename, (UWord)argv, (UWord)envp); |
| 337 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 338 | VG_(printf)("EXEC failed, errno = %lld\n", (Long)sr_Err(res)); |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 339 | } |
| 340 | |
sewardj | e6a2524 | 2002-04-21 22:03:07 +0000 | [diff] [blame] | 341 | /* Return -1 if error, else 0. NOTE does not indicate return code of |
| 342 | child! */ |
| 343 | Int VG_(system) ( Char* cmd ) |
| 344 | { |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 345 | Int pid; |
sewardj | e6a2524 | 2002-04-21 22:03:07 +0000 | [diff] [blame] | 346 | if (cmd == NULL) |
| 347 | return 1; |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 348 | pid = VG_(fork)(); |
| 349 | if (pid < 0) |
sewardj | e6a2524 | 2002-04-21 22:03:07 +0000 | [diff] [blame] | 350 | return -1; |
| 351 | if (pid == 0) { |
| 352 | /* child */ |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 353 | Char* argv[4] = { "/bin/sh", "-c", cmd, 0 }; |
| 354 | VG_(execv)(argv[0], argv); |
nethercote | ff9721d | 2004-01-26 17:10:01 +0000 | [diff] [blame] | 355 | |
sewardj | e6a2524 | 2002-04-21 22:03:07 +0000 | [diff] [blame] | 356 | /* If we're still alive here, execve failed. */ |
fitzhardinge | abab839 | 2004-03-02 21:38:51 +0000 | [diff] [blame] | 357 | VG_(exit)(1); |
sewardj | e6a2524 | 2002-04-21 22:03:07 +0000 | [diff] [blame] | 358 | } else { |
| 359 | /* parent */ |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 360 | /* We have to set SIGCHLD to its default behaviour in order that |
| 361 | VG_(waitpid) works (at least on AIX). According to the Linux |
| 362 | man page for waitpid: |
| 363 | |
| 364 | POSIX.1-2001 specifies that if the disposition of SIGCHLD is |
| 365 | set to SIG_IGN or the SA_NOCLDWAIT flag is set for SIGCHLD |
| 366 | (see sigaction(2)), then children that terminate do not |
| 367 | become zombies and a call to wait() or waitpid() will block |
| 368 | until all children have terminated, and then fail with errno |
| 369 | set to ECHILD. (The original POSIX standard left the |
| 370 | behaviour of setting SIGCHLD to SIG_IGN unspecified.) |
| 371 | */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 372 | Int ir, zzz; |
| 373 | vki_sigaction_toK_t sa, sa2; |
| 374 | vki_sigaction_fromK_t saved_sa; |
| 375 | VG_(memset)( &sa, 0, sizeof(sa) ); |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 376 | VG_(sigemptyset)(&sa.sa_mask); |
| 377 | sa.ksa_handler = VKI_SIG_DFL; |
| 378 | sa.sa_flags = 0; |
| 379 | ir = VG_(sigaction)(VKI_SIGCHLD, &sa, &saved_sa); |
| 380 | vg_assert(ir == 0); |
| 381 | |
| 382 | zzz = VG_(waitpid)(pid, NULL, 0); |
| 383 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 384 | VG_(convert_sigaction_fromK_to_toK)( &saved_sa, &sa2 ); |
| 385 | ir = VG_(sigaction)(VKI_SIGCHLD, &sa2, NULL); |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 386 | vg_assert(ir == 0); |
sewardj | a8d8e23 | 2005-06-07 20:04:56 +0000 | [diff] [blame] | 387 | return zzz == -1 ? -1 : 0; |
sewardj | e6a2524 | 2002-04-21 22:03:07 +0000 | [diff] [blame] | 388 | } |
| 389 | } |
| 390 | |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 391 | /* --------------------------------------------------------------------- |
| 392 | Resource limits |
| 393 | ------------------------------------------------------------------ */ |
| 394 | |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 395 | /* Support for getrlimit. */ |
| 396 | Int VG_(getrlimit) (Int resource, struct vki_rlimit *rlim) |
| 397 | { |
| 398 | SysRes res = VG_(mk_SysRes_Error)(VKI_ENOSYS); |
| 399 | /* res = getrlimit( resource, rlim ); */ |
| 400 | # ifdef __NR_ugetrlimit |
| 401 | res = VG_(do_syscall2)(__NR_ugetrlimit, resource, (UWord)rlim); |
| 402 | # endif |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 403 | if (sr_isError(res) && sr_Err(res) == VKI_ENOSYS) |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 404 | res = VG_(do_syscall2)(__NR_getrlimit, resource, (UWord)rlim); |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 405 | return sr_isError(res) ? -1 : sr_Res(res); |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 406 | } |
| 407 | |
| 408 | |
| 409 | /* Support for setrlimit. */ |
| 410 | Int VG_(setrlimit) (Int resource, const struct vki_rlimit *rlim) |
| 411 | { |
| 412 | SysRes res; |
| 413 | /* res = setrlimit( resource, rlim ); */ |
| 414 | res = VG_(do_syscall2)(__NR_setrlimit, resource, (UWord)rlim); |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 415 | return sr_isError(res) ? -1 : sr_Res(res); |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 416 | } |
sewardj | e6a2524 | 2002-04-21 22:03:07 +0000 | [diff] [blame] | 417 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 418 | /* --------------------------------------------------------------------- |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 419 | pids, etc |
| 420 | ------------------------------------------------------------------ */ |
| 421 | |
| 422 | Int VG_(gettid)(void) |
| 423 | { |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 424 | # if defined(VGO_linux) |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 425 | SysRes res = VG_(do_syscall0)(__NR_gettid); |
| 426 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 427 | if (sr_isError(res) && sr_Res(res) == VKI_ENOSYS) { |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 428 | Char pid[16]; |
| 429 | /* |
| 430 | * The gettid system call does not exist. The obvious assumption |
| 431 | * to make at this point would be that we are running on an older |
| 432 | * system where the getpid system call actually returns the ID of |
| 433 | * the current thread. |
| 434 | * |
| 435 | * Unfortunately it seems that there are some systems with a kernel |
| 436 | * where getpid has been changed to return the ID of the thread group |
| 437 | * leader but where the gettid system call has not yet been added. |
| 438 | * |
| 439 | * So instead of calling getpid here we use readlink to see where |
| 440 | * the /proc/self link is pointing... |
| 441 | */ |
| 442 | |
| 443 | res = VG_(do_syscall3)(__NR_readlink, (UWord)"/proc/self", |
| 444 | (UWord)pid, sizeof(pid)); |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 445 | if (!sr_isError(res) && sr_Res(res) > 0) { |
njn | 83df0b6 | 2009-02-25 01:01:05 +0000 | [diff] [blame] | 446 | Char* s; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 447 | pid[sr_Res(res)] = '\0'; |
| 448 | res = VG_(mk_SysRes_Success)( VG_(strtoll10)(pid, &s) ); |
njn | 83df0b6 | 2009-02-25 01:01:05 +0000 | [diff] [blame] | 449 | if (*s != '\0') { |
| 450 | VG_(message)(Vg_DebugMsg, |
sewardj | 738856f | 2009-07-15 14:48:32 +0000 | [diff] [blame] | 451 | "Warning: invalid file name linked to by /proc/self: %s\n", |
| 452 | pid); |
njn | 83df0b6 | 2009-02-25 01:01:05 +0000 | [diff] [blame] | 453 | } |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 454 | } |
| 455 | } |
| 456 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 457 | return sr_Res(res); |
| 458 | |
| 459 | # elif defined(VGO_aix5) |
| 460 | SysRes res; |
| 461 | Int r; |
| 462 | vg_assert(__NR_AIX5__thread_self != __NR_AIX5_UNKNOWN); |
| 463 | res = VG_(do_syscall0)(__NR_AIX5__thread_self); |
| 464 | r = sr_Res(res); |
| 465 | return r; |
| 466 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 467 | # elif defined(VGO_darwin) |
| 468 | // Darwin's gettid syscall is something else. |
| 469 | // Use Mach thread ports for lwpid instead. |
| 470 | return mach_thread_self(); |
| 471 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 472 | # else |
| 473 | # error "Unknown OS" |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 474 | # endif |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 475 | } |
| 476 | |
| 477 | /* You'd be amazed how many places need to know the current pid. */ |
| 478 | Int VG_(getpid) ( void ) |
| 479 | { |
| 480 | /* ASSUMES SYSCALL ALWAYS SUCCEEDS */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 481 | return sr_Res( VG_(do_syscall0)(__NR_getpid) ); |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 482 | } |
| 483 | |
| 484 | Int VG_(getpgrp) ( void ) |
| 485 | { |
| 486 | /* ASSUMES SYSCALL ALWAYS SUCCEEDS */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 487 | return sr_Res( VG_(do_syscall0)(__NR_getpgrp) ); |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 488 | } |
| 489 | |
| 490 | Int VG_(getppid) ( void ) |
| 491 | { |
| 492 | /* ASSUMES SYSCALL ALWAYS SUCCEEDS */ |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 493 | return sr_Res( VG_(do_syscall0)(__NR_getppid) ); |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 494 | } |
| 495 | |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 496 | Int VG_(geteuid) ( void ) |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 497 | { |
| 498 | /* ASSUMES SYSCALL ALWAYS SUCCEEDS */ |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 499 | # if defined(VGP_ppc32_aix5) || defined(VGP_ppc64_aix5) |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 500 | return sr_Res( VG_(do_syscall1)(__NR_AIX5_getuidx, 1) ); |
tom | 8de3e81 | 2007-10-23 08:03:59 +0000 | [diff] [blame] | 501 | # elif defined(__NR_geteuid32) |
njn | a8b1c48 | 2007-10-23 22:26:12 +0000 | [diff] [blame] | 502 | // We use the 32-bit version if it's supported. Otherwise, IDs greater |
| 503 | // than 65536 cause problems, as bug #151209 showed. |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 504 | return sr_Res( VG_(do_syscall0)(__NR_geteuid32) ); |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 505 | # else |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 506 | return sr_Res( VG_(do_syscall0)(__NR_geteuid) ); |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 507 | # endif |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 508 | } |
| 509 | |
| 510 | Int VG_(getegid) ( void ) |
| 511 | { |
| 512 | /* ASSUMES SYSCALL ALWAYS SUCCEEDS */ |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 513 | # if defined(VGP_ppc32_aix5) || defined(VGP_ppc64_aix5) |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 514 | return sr_Res( VG_(do_syscall1)(__NR_AIX5_getgidx, 1) ); |
tom | 8de3e81 | 2007-10-23 08:03:59 +0000 | [diff] [blame] | 515 | # elif defined(__NR_getegid32) |
njn | a8b1c48 | 2007-10-23 22:26:12 +0000 | [diff] [blame] | 516 | // We use the 32-bit version if it's supported. Otherwise, IDs greater |
| 517 | // than 65536 cause problems, as bug #151209 showed. |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 518 | return sr_Res( VG_(do_syscall0)(__NR_getegid32) ); |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 519 | # else |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 520 | return sr_Res( VG_(do_syscall0)(__NR_getegid) ); |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 521 | # endif |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | /* Get supplementary groups into list[0 .. size-1]. Returns the |
| 525 | number of groups written, or -1 if error. Note that in order to be |
| 526 | portable, the groups are 32-bit unsigned ints regardless of the |
| 527 | platform. */ |
| 528 | Int VG_(getgroups)( Int size, UInt* list ) |
| 529 | { |
sewardj | a48a493 | 2005-09-29 11:09:56 +0000 | [diff] [blame] | 530 | # if defined(VGP_x86_linux) || defined(VGP_ppc32_linux) |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 531 | Int i; |
| 532 | SysRes sres; |
sewardj | 3ae3dd3 | 2005-12-27 02:08:03 +0000 | [diff] [blame] | 533 | UShort list16[64]; |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 534 | if (size < 0) return -1; |
sewardj | 3ae3dd3 | 2005-12-27 02:08:03 +0000 | [diff] [blame] | 535 | if (size > 64) size = 64; |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 536 | sres = VG_(do_syscall2)(__NR_getgroups, size, (Addr)list16); |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 537 | if (sr_isError(sres)) |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 538 | return -1; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 539 | if (sr_Res(sres) > size) |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 540 | return -1; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 541 | for (i = 0; i < sr_Res(sres); i++) |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 542 | list[i] = (UInt)list16[i]; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 543 | return sr_Res(sres); |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 544 | |
sewardj | 59570ff | 2010-01-01 11:59:33 +0000 | [diff] [blame] | 545 | # elif defined(VGP_amd64_linux) || defined(VGP_ppc64_linux) \ |
| 546 | || defined(VGP_arm_linux) \ |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 547 | || defined(VGP_ppc32_aix5) || defined(VGP_ppc64_aix5) \ |
| 548 | || defined(VGO_darwin) |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 549 | SysRes sres; |
| 550 | sres = VG_(do_syscall2)(__NR_getgroups, size, (Addr)list); |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 551 | if (sr_isError(sres)) |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 552 | return -1; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 553 | return sr_Res(sres); |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 554 | |
| 555 | # else |
| 556 | # error "VG_(getgroups): needs implementation on this platform" |
| 557 | # endif |
| 558 | } |
| 559 | |
| 560 | /* --------------------------------------------------------------------- |
| 561 | Process tracing |
| 562 | ------------------------------------------------------------------ */ |
| 563 | |
| 564 | Int VG_(ptrace) ( Int request, Int pid, void *addr, void *data ) |
| 565 | { |
| 566 | SysRes res; |
| 567 | res = VG_(do_syscall4)(__NR_ptrace, request, pid, (UWord)addr, (UWord)data); |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 568 | if (sr_isError(res)) |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 569 | return -1; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 570 | return sr_Res(res); |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 571 | } |
| 572 | |
| 573 | /* --------------------------------------------------------------------- |
| 574 | Fork |
| 575 | ------------------------------------------------------------------ */ |
| 576 | |
| 577 | Int VG_(fork) ( void ) |
| 578 | { |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 579 | # if defined(VGO_linux) || defined(VGO_aix5) |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 580 | SysRes res; |
| 581 | res = VG_(do_syscall0)(__NR_fork); |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 582 | if (sr_isError(res)) |
sewardj | 45f4e7c | 2005-09-27 19:20:21 +0000 | [diff] [blame] | 583 | return -1; |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 584 | return sr_Res(res); |
| 585 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 586 | # elif defined(VGO_darwin) |
| 587 | SysRes res; |
| 588 | res = VG_(do_syscall0)(__NR_fork); /* __NR_fork is UX64 */ |
| 589 | if (sr_isError(res)) |
| 590 | return -1; |
| 591 | /* on success: wLO = child pid; wHI = 1 for child, 0 for parent */ |
| 592 | if (sr_ResHI(res) != 0) { |
| 593 | return 0; /* this is child: return 0 instead of child pid */ |
| 594 | } |
| 595 | return sr_Res(res); |
| 596 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 597 | # else |
| 598 | # error "Unknown OS" |
| 599 | # endif |
njn | f39e9a3 | 2005-06-12 02:43:17 +0000 | [diff] [blame] | 600 | } |
| 601 | |
| 602 | /* --------------------------------------------------------------------- |
| 603 | Timing stuff |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 604 | ------------------------------------------------------------------ */ |
| 605 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 606 | UInt VG_(read_millisecond_timer) ( void ) |
| 607 | { |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 608 | /* 'now' and 'base' are in microseconds */ |
fitzhardinge | 426f9e6 | 2004-01-25 03:44:18 +0000 | [diff] [blame] | 609 | static ULong base = 0; |
sewardj | a8d8e23 | 2005-06-07 20:04:56 +0000 | [diff] [blame] | 610 | ULong now; |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 611 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 612 | # if defined(VGO_linux) |
| 613 | { SysRes res; |
| 614 | struct vki_timespec ts_now; |
| 615 | res = VG_(do_syscall2)(__NR_clock_gettime, VKI_CLOCK_MONOTONIC, |
| 616 | (UWord)&ts_now); |
| 617 | if (sr_isError(res) == 0) { |
| 618 | now = ts_now.tv_sec * 1000000ULL + ts_now.tv_nsec / 1000; |
| 619 | } else { |
| 620 | struct vki_timeval tv_now; |
| 621 | res = VG_(do_syscall2)(__NR_gettimeofday, (UWord)&tv_now, (UWord)NULL); |
| 622 | vg_assert(! sr_isError(res)); |
| 623 | now = tv_now.tv_sec * 1000000ULL + tv_now.tv_usec; |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | # elif defined(VGO_aix5) |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 628 | /* AIX requires a totally different implementation since |
| 629 | sys_gettimeofday doesn't exist. We use the POWER real-time |
| 630 | register facility. This will SIGILL on PowerPC 970 on AIX, |
| 631 | since PowerPC doesn't support these instructions. */ |
| 632 | UWord nsec, sec1, sec2; |
| 633 | while (1) { |
| 634 | __asm__ __volatile__ ("\n" |
| 635 | "\tmfspr %0,4\n" /* 4==RTCU */ |
| 636 | "\tmfspr %1,5\n" /* 5==RTCL */ |
| 637 | "\tmfspr %2,4\n" /* 4==RTCU */ |
| 638 | : "=b" (sec1), "=b" (nsec), "=b" (sec2) |
| 639 | ); |
| 640 | if (sec1 == sec2) break; |
| 641 | } |
| 642 | vg_assert(nsec < 1000*1000*1000); |
| 643 | now = ((ULong)sec1) * 1000000ULL; |
| 644 | now += (ULong)(nsec / 1000); |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 645 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 646 | # elif defined(VGO_darwin) |
njn | be7e31a | 2009-07-22 02:52:14 +0000 | [diff] [blame] | 647 | // Weird: it seems that gettimeofday() doesn't fill in the timeval, but |
| 648 | // rather returns the tv_sec as the low 32 bits of the result and the |
| 649 | // tv_usec as the high 32 bits of the result. (But the timeval cannot be |
| 650 | // NULL!) See bug 200990. |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 651 | { SysRes res; |
bart | 8f99259 | 2009-07-21 17:46:56 +0000 | [diff] [blame] | 652 | struct vki_timeval tv_now = { 0, 0 }; |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 653 | res = VG_(do_syscall2)(__NR_gettimeofday, (UWord)&tv_now, (UWord)NULL); |
| 654 | vg_assert(! sr_isError(res)); |
njn | be7e31a | 2009-07-22 02:52:14 +0000 | [diff] [blame] | 655 | now = sr_Res(res) * 1000000ULL + sr_ResHI(res); |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 656 | } |
| 657 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 658 | # else |
| 659 | # error "Unknown OS" |
sewardj | d470bfc | 2006-10-17 02:16:44 +0000 | [diff] [blame] | 660 | # endif |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 661 | |
| 662 | /* COMMON CODE */ |
fitzhardinge | 6687169 | 2004-01-25 03:32:58 +0000 | [diff] [blame] | 663 | if (base == 0) |
| 664 | base = now; |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 665 | |
fitzhardinge | 6687169 | 2004-01-25 03:32:58 +0000 | [diff] [blame] | 666 | return (now - base) / 1000; |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 667 | } |
| 668 | |
njn | cda2f0f | 2009-05-18 02:12:08 +0000 | [diff] [blame] | 669 | |
sewardj | 5f07b66 | 2002-04-23 16:52:51 +0000 | [diff] [blame] | 670 | /* --------------------------------------------------------------------- |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 671 | atfork() |
sewardj | a8d8e23 | 2005-06-07 20:04:56 +0000 | [diff] [blame] | 672 | ------------------------------------------------------------------ */ |
| 673 | |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 674 | struct atfork { |
| 675 | vg_atfork_t pre; |
| 676 | vg_atfork_t parent; |
| 677 | vg_atfork_t child; |
| 678 | }; |
sewardj | a8d8e23 | 2005-06-07 20:04:56 +0000 | [diff] [blame] | 679 | |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 680 | #define VG_MAX_ATFORK 10 |
sewardj | a8d8e23 | 2005-06-07 20:04:56 +0000 | [diff] [blame] | 681 | |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 682 | static struct atfork atforks[VG_MAX_ATFORK]; |
| 683 | static Int n_atfork = 0; |
| 684 | |
| 685 | void VG_(atfork)(vg_atfork_t pre, vg_atfork_t parent, vg_atfork_t child) |
sewardj | a8d8e23 | 2005-06-07 20:04:56 +0000 | [diff] [blame] | 686 | { |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 687 | Int i; |
sewardj | a8d8e23 | 2005-06-07 20:04:56 +0000 | [diff] [blame] | 688 | |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 689 | for (i = 0; i < n_atfork; i++) { |
| 690 | if (atforks[i].pre == pre && |
| 691 | atforks[i].parent == parent && |
| 692 | atforks[i].child == child) |
| 693 | return; |
| 694 | } |
| 695 | |
| 696 | if (n_atfork >= VG_MAX_ATFORK) |
| 697 | VG_(core_panic)( |
| 698 | "Too many VG_(atfork) handlers requested: raise VG_MAX_ATFORK"); |
| 699 | |
| 700 | atforks[n_atfork].pre = pre; |
| 701 | atforks[n_atfork].parent = parent; |
| 702 | atforks[n_atfork].child = child; |
| 703 | |
| 704 | n_atfork++; |
| 705 | } |
| 706 | |
| 707 | void VG_(do_atfork_pre)(ThreadId tid) |
| 708 | { |
| 709 | Int i; |
| 710 | |
| 711 | for (i = 0; i < n_atfork; i++) |
| 712 | if (atforks[i].pre != NULL) |
| 713 | (*atforks[i].pre)(tid); |
| 714 | } |
| 715 | |
| 716 | void VG_(do_atfork_parent)(ThreadId tid) |
| 717 | { |
| 718 | Int i; |
| 719 | |
| 720 | for (i = 0; i < n_atfork; i++) |
| 721 | if (atforks[i].parent != NULL) |
| 722 | (*atforks[i].parent)(tid); |
sewardj | a8d8e23 | 2005-06-07 20:04:56 +0000 | [diff] [blame] | 723 | } |
| 724 | |
| 725 | void VG_(do_atfork_child)(ThreadId tid) |
| 726 | { |
njn | e9ba34a | 2008-10-13 04:19:15 +0000 | [diff] [blame] | 727 | Int i; |
| 728 | |
| 729 | for (i = 0; i < n_atfork; i++) |
| 730 | if (atforks[i].child != NULL) |
| 731 | (*atforks[i].child)(tid); |
sewardj | a8d8e23 | 2005-06-07 20:04:56 +0000 | [diff] [blame] | 732 | } |
| 733 | |
njn | f76d27a | 2009-05-28 01:53:07 +0000 | [diff] [blame] | 734 | |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 735 | /*--------------------------------------------------------------------*/ |
njn | c616819 | 2004-11-29 13:54:10 +0000 | [diff] [blame] | 736 | /*--- end ---*/ |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 737 | /*--------------------------------------------------------------------*/ |