njn | de62cbf | 2005-06-10 22:08:14 +0000 | [diff] [blame] | 1 | |
| 2 | /*--------------------------------------------------------------------*/ |
| 3 | /*--- Signal-related libc stuff. m_libcsignal.c ---*/ |
| 4 | /*--------------------------------------------------------------------*/ |
| 5 | |
| 6 | /* |
| 7 | This file is part of Valgrind, a dynamic binary instrumentation |
| 8 | framework. |
| 9 | |
| 10 | Copyright (C) 2000-2005 Julian Seward |
| 11 | jseward@acm.org |
| 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 | |
| 28 | The GNU General Public License is contained in the file COPYING. |
| 29 | */ |
| 30 | |
njn | c7561b9 | 2005-06-19 01:24:32 +0000 | [diff] [blame] | 31 | #include "pub_core_basics.h" |
njn | de62cbf | 2005-06-10 22:08:14 +0000 | [diff] [blame] | 32 | #include "pub_core_libcbase.h" |
| 33 | #include "pub_core_libcassert.h" |
| 34 | #include "pub_core_libcsignal.h" |
njn | 9abd608 | 2005-06-17 21:31:45 +0000 | [diff] [blame] | 35 | #include "pub_core_syscall.h" |
njn | de62cbf | 2005-06-10 22:08:14 +0000 | [diff] [blame] | 36 | #include "vki_unistd.h" |
| 37 | |
| 38 | /* sigemptyset, sigfullset, sigaddset and sigdelset return 0 on |
| 39 | success and -1 on error. */ |
| 40 | |
| 41 | Int VG_(sigfillset)( vki_sigset_t* set ) |
| 42 | { |
| 43 | Int i; |
| 44 | if (set == NULL) |
| 45 | return -1; |
| 46 | for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| 47 | set->sig[i] = ~(UWord)0x0; |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | Int VG_(sigemptyset)( vki_sigset_t* set ) |
| 52 | { |
| 53 | Int i; |
| 54 | if (set == NULL) |
| 55 | return -1; |
| 56 | for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| 57 | set->sig[i] = 0x0; |
| 58 | return 0; |
| 59 | } |
| 60 | |
| 61 | Bool VG_(isemptysigset)( const vki_sigset_t* set ) |
| 62 | { |
| 63 | Int i; |
| 64 | vg_assert(set != NULL); |
| 65 | for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| 66 | if (set->sig[i] != 0x0) return False; |
| 67 | return True; |
| 68 | } |
| 69 | |
| 70 | Bool VG_(isfullsigset)( const vki_sigset_t* set ) |
| 71 | { |
| 72 | Int i; |
| 73 | vg_assert(set != NULL); |
| 74 | for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| 75 | if (set->sig[i] != ~(UWord)0x0) return False; |
| 76 | return True; |
| 77 | } |
| 78 | |
| 79 | Bool VG_(iseqsigset)( const vki_sigset_t* set1, const vki_sigset_t* set2 ) |
| 80 | { |
| 81 | Int i; |
| 82 | vg_assert(set1 != NULL && set2 != NULL); |
| 83 | for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| 84 | if (set1->sig[i] != set2->sig[i]) return False; |
| 85 | return True; |
| 86 | } |
| 87 | |
| 88 | |
| 89 | Int VG_(sigaddset)( vki_sigset_t* set, Int signum ) |
| 90 | { |
| 91 | if (set == NULL) |
| 92 | return -1; |
| 93 | if (signum < 1 || signum > _VKI_NSIG) |
| 94 | return -1; |
| 95 | signum--; |
| 96 | set->sig[signum / _VKI_NSIG_BPW] |= (1UL << (signum % _VKI_NSIG_BPW)); |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | Int VG_(sigdelset)( vki_sigset_t* set, Int signum ) |
| 101 | { |
| 102 | if (set == NULL) |
| 103 | return -1; |
| 104 | if (signum < 1 || signum > _VKI_NSIG) |
| 105 | return -1; |
| 106 | signum--; |
| 107 | set->sig[signum / _VKI_NSIG_BPW] &= ~(1UL << (signum % _VKI_NSIG_BPW)); |
| 108 | return 0; |
| 109 | } |
| 110 | |
| 111 | Int VG_(sigismember) ( const vki_sigset_t* set, Int signum ) |
| 112 | { |
| 113 | if (set == NULL) |
| 114 | return 0; |
| 115 | if (signum < 1 || signum > _VKI_NSIG) |
| 116 | return 0; |
| 117 | signum--; |
| 118 | if (1 & ((set->sig[signum / _VKI_NSIG_BPW]) >> (signum % _VKI_NSIG_BPW))) |
| 119 | return 1; |
| 120 | else |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | |
| 125 | /* Add all signals in src to dst. */ |
| 126 | void VG_(sigaddset_from_set)( vki_sigset_t* dst, vki_sigset_t* src ) |
| 127 | { |
| 128 | Int i; |
| 129 | vg_assert(dst != NULL && src != NULL); |
| 130 | for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| 131 | dst->sig[i] |= src->sig[i]; |
| 132 | } |
| 133 | |
| 134 | /* Remove all signals in src from dst. */ |
| 135 | void VG_(sigdelset_from_set)( vki_sigset_t* dst, vki_sigset_t* src ) |
| 136 | { |
| 137 | Int i; |
| 138 | vg_assert(dst != NULL && src != NULL); |
| 139 | for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| 140 | dst->sig[i] &= ~(src->sig[i]); |
| 141 | } |
| 142 | |
| 143 | |
| 144 | /* The functions sigaction, sigprocmask, sigpending and sigsuspend |
| 145 | return 0 on success and -1 on error. |
| 146 | */ |
| 147 | Int VG_(sigprocmask)( Int how, const vki_sigset_t* set, vki_sigset_t* oldset) |
| 148 | { |
| 149 | SysRes res = VG_(do_syscall4)(__NR_rt_sigprocmask, |
| 150 | how, (UWord)set, (UWord)oldset, |
| 151 | _VKI_NSIG_WORDS * sizeof(UWord)); |
| 152 | return res.isError ? -1 : 0; |
| 153 | } |
| 154 | |
| 155 | |
| 156 | Int VG_(sigaction) ( Int signum, const struct vki_sigaction* act, |
| 157 | struct vki_sigaction* oldact) |
| 158 | { |
| 159 | SysRes res = VG_(do_syscall4)(__NR_rt_sigaction, |
| 160 | signum, (UWord)act, (UWord)oldact, |
| 161 | _VKI_NSIG_WORDS * sizeof(UWord)); |
| 162 | return res.isError ? -1 : 0; |
| 163 | } |
| 164 | |
| 165 | |
| 166 | Int VG_(sigaltstack)( const vki_stack_t* ss, vki_stack_t* oss ) |
| 167 | { |
| 168 | SysRes res = VG_(do_syscall2)(__NR_sigaltstack, (UWord)ss, (UWord)oss); |
| 169 | return res.isError ? -1 : 0; |
| 170 | } |
| 171 | |
| 172 | Int VG_(sigtimedwait)( const vki_sigset_t *set, vki_siginfo_t *info, |
| 173 | const struct vki_timespec *timeout ) |
| 174 | { |
| 175 | SysRes res = VG_(do_syscall4)(__NR_rt_sigtimedwait, (UWord)set, (UWord)info, |
| 176 | (UWord)timeout, sizeof(*set)); |
| 177 | return res.isError ? -1 : res.val; |
| 178 | } |
| 179 | |
| 180 | Int VG_(signal)(Int signum, void (*sighandler)(Int)) |
| 181 | { |
| 182 | SysRes res; |
| 183 | Int n; |
| 184 | struct vki_sigaction sa; |
| 185 | sa.ksa_handler = sighandler; |
| 186 | sa.sa_flags = VKI_SA_ONSTACK | VKI_SA_RESTART; |
| 187 | sa.sa_restorer = NULL; |
| 188 | n = VG_(sigemptyset)( &sa.sa_mask ); |
| 189 | vg_assert(n == 0); |
| 190 | res = VG_(do_syscall4)(__NR_rt_sigaction, signum, (UWord)&sa, (UWord)NULL, |
| 191 | _VKI_NSIG_WORDS * sizeof(UWord)); |
| 192 | return res.isError ? -1 : 0; |
| 193 | } |
| 194 | |
| 195 | |
| 196 | Int VG_(kill)( Int pid, Int signo ) |
| 197 | { |
| 198 | SysRes res = VG_(do_syscall2)(__NR_kill, pid, signo); |
| 199 | return res.isError ? -1 : 0; |
| 200 | } |
| 201 | |
| 202 | |
| 203 | Int VG_(tkill)( ThreadId tid, Int signo ) |
| 204 | { |
| 205 | SysRes res = VG_(mk_SysRes_Error)(VKI_ENOSYS); |
| 206 | |
| 207 | #if 0 |
| 208 | /* This isn't right because the client may create a process |
| 209 | structure with multiple thread groups */ |
njn | 94c6ace | 2005-06-11 17:19:18 +0000 | [diff] [blame] | 210 | res = VG_(do_syscall3)(__NR_tgkill, VG_(getpid)(), tid, signo); |
njn | de62cbf | 2005-06-10 22:08:14 +0000 | [diff] [blame] | 211 | #endif |
| 212 | |
| 213 | res = VG_(do_syscall2)(__NR_tkill, tid, signo); |
| 214 | |
| 215 | if (res.isError && res.val == VKI_ENOSYS) |
| 216 | res = VG_(do_syscall2)(__NR_kill, tid, signo); |
| 217 | |
| 218 | return res.isError ? -1 : 0; |
| 219 | } |
| 220 | |
| 221 | Int VG_(sigpending) ( vki_sigset_t* set ) |
| 222 | { |
| 223 | // Nb: AMD64/Linux doesn't have __NR_sigpending; it only provides |
| 224 | // __NR_rt_sigpending. This function will have to be abstracted in some |
| 225 | // way to account for this. In the meantime, the easy option is to forget |
| 226 | // about it for AMD64 until it's needed. |
njn | f8c78a5 | 2005-06-18 15:09:28 +0000 | [diff] [blame] | 227 | #if defined(VGA_amd64) |
njn | de62cbf | 2005-06-10 22:08:14 +0000 | [diff] [blame] | 228 | I_die_here; |
| 229 | #else |
| 230 | SysRes res = VG_(do_syscall1)(__NR_sigpending, (UWord)set); |
| 231 | return res.isError ? -1 : 0; |
| 232 | #endif |
| 233 | } |
| 234 | |
| 235 | /*--------------------------------------------------------------------*/ |
| 236 | /*--- end ---*/ |
| 237 | /*--------------------------------------------------------------------*/ |