| |
| /*--------------------------------------------------------------------*/ |
| /*--- Signal-related libc stuff. m_libcsignal.c ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, a dynamic binary instrumentation |
| framework. |
| |
| Copyright (C) 2000-2005 Julian Seward |
| jseward@acm.org |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| #include "pub_core_basics.h" |
| #include "pub_core_libcbase.h" |
| #include "pub_core_libcassert.h" |
| #include "pub_core_libcsignal.h" |
| #include "pub_core_syscall.h" |
| #include "vki_unistd.h" |
| |
| /* sigemptyset, sigfullset, sigaddset and sigdelset return 0 on |
| success and -1 on error. */ |
| |
| Int VG_(sigfillset)( vki_sigset_t* set ) |
| { |
| Int i; |
| if (set == NULL) |
| return -1; |
| for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| set->sig[i] = ~(UWord)0x0; |
| return 0; |
| } |
| |
| Int VG_(sigemptyset)( vki_sigset_t* set ) |
| { |
| Int i; |
| if (set == NULL) |
| return -1; |
| for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| set->sig[i] = 0x0; |
| return 0; |
| } |
| |
| Bool VG_(isemptysigset)( const vki_sigset_t* set ) |
| { |
| Int i; |
| vg_assert(set != NULL); |
| for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| if (set->sig[i] != 0x0) return False; |
| return True; |
| } |
| |
| Bool VG_(isfullsigset)( const vki_sigset_t* set ) |
| { |
| Int i; |
| vg_assert(set != NULL); |
| for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| if (set->sig[i] != ~(UWord)0x0) return False; |
| return True; |
| } |
| |
| Bool VG_(iseqsigset)( const vki_sigset_t* set1, const vki_sigset_t* set2 ) |
| { |
| Int i; |
| vg_assert(set1 != NULL && set2 != NULL); |
| for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| if (set1->sig[i] != set2->sig[i]) return False; |
| return True; |
| } |
| |
| |
| Int VG_(sigaddset)( vki_sigset_t* set, Int signum ) |
| { |
| if (set == NULL) |
| return -1; |
| if (signum < 1 || signum > _VKI_NSIG) |
| return -1; |
| signum--; |
| set->sig[signum / _VKI_NSIG_BPW] |= (1UL << (signum % _VKI_NSIG_BPW)); |
| return 0; |
| } |
| |
| Int VG_(sigdelset)( vki_sigset_t* set, Int signum ) |
| { |
| if (set == NULL) |
| return -1; |
| if (signum < 1 || signum > _VKI_NSIG) |
| return -1; |
| signum--; |
| set->sig[signum / _VKI_NSIG_BPW] &= ~(1UL << (signum % _VKI_NSIG_BPW)); |
| return 0; |
| } |
| |
| Int VG_(sigismember) ( const vki_sigset_t* set, Int signum ) |
| { |
| if (set == NULL) |
| return 0; |
| if (signum < 1 || signum > _VKI_NSIG) |
| return 0; |
| signum--; |
| if (1 & ((set->sig[signum / _VKI_NSIG_BPW]) >> (signum % _VKI_NSIG_BPW))) |
| return 1; |
| else |
| return 0; |
| } |
| |
| |
| /* Add all signals in src to dst. */ |
| void VG_(sigaddset_from_set)( vki_sigset_t* dst, vki_sigset_t* src ) |
| { |
| Int i; |
| vg_assert(dst != NULL && src != NULL); |
| for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| dst->sig[i] |= src->sig[i]; |
| } |
| |
| /* Remove all signals in src from dst. */ |
| void VG_(sigdelset_from_set)( vki_sigset_t* dst, vki_sigset_t* src ) |
| { |
| Int i; |
| vg_assert(dst != NULL && src != NULL); |
| for (i = 0; i < _VKI_NSIG_WORDS; i++) |
| dst->sig[i] &= ~(src->sig[i]); |
| } |
| |
| |
| /* The functions sigaction, sigprocmask, sigpending and sigsuspend |
| return 0 on success and -1 on error. |
| */ |
| Int VG_(sigprocmask)( Int how, const vki_sigset_t* set, vki_sigset_t* oldset) |
| { |
| SysRes res = VG_(do_syscall4)(__NR_rt_sigprocmask, |
| how, (UWord)set, (UWord)oldset, |
| _VKI_NSIG_WORDS * sizeof(UWord)); |
| return res.isError ? -1 : 0; |
| } |
| |
| |
| Int VG_(sigaction) ( Int signum, const struct vki_sigaction* act, |
| struct vki_sigaction* oldact) |
| { |
| SysRes res = VG_(do_syscall4)(__NR_rt_sigaction, |
| signum, (UWord)act, (UWord)oldact, |
| _VKI_NSIG_WORDS * sizeof(UWord)); |
| return res.isError ? -1 : 0; |
| } |
| |
| |
| Int VG_(sigaltstack)( const vki_stack_t* ss, vki_stack_t* oss ) |
| { |
| SysRes res = VG_(do_syscall2)(__NR_sigaltstack, (UWord)ss, (UWord)oss); |
| return res.isError ? -1 : 0; |
| } |
| |
| Int VG_(sigtimedwait)( const vki_sigset_t *set, vki_siginfo_t *info, |
| const struct vki_timespec *timeout ) |
| { |
| SysRes res = VG_(do_syscall4)(__NR_rt_sigtimedwait, (UWord)set, (UWord)info, |
| (UWord)timeout, sizeof(*set)); |
| return res.isError ? -1 : res.val; |
| } |
| |
| Int VG_(signal)(Int signum, void (*sighandler)(Int)) |
| { |
| SysRes res; |
| Int n; |
| struct vki_sigaction sa; |
| sa.ksa_handler = sighandler; |
| sa.sa_flags = VKI_SA_ONSTACK | VKI_SA_RESTART; |
| sa.sa_restorer = NULL; |
| n = VG_(sigemptyset)( &sa.sa_mask ); |
| vg_assert(n == 0); |
| res = VG_(do_syscall4)(__NR_rt_sigaction, signum, (UWord)&sa, (UWord)NULL, |
| _VKI_NSIG_WORDS * sizeof(UWord)); |
| return res.isError ? -1 : 0; |
| } |
| |
| |
| Int VG_(kill)( Int pid, Int signo ) |
| { |
| SysRes res = VG_(do_syscall2)(__NR_kill, pid, signo); |
| return res.isError ? -1 : 0; |
| } |
| |
| |
| Int VG_(tkill)( ThreadId tid, Int signo ) |
| { |
| SysRes res = VG_(mk_SysRes_Error)(VKI_ENOSYS); |
| |
| #if 0 |
| /* This isn't right because the client may create a process |
| structure with multiple thread groups */ |
| res = VG_(do_syscall3)(__NR_tgkill, VG_(getpid)(), tid, signo); |
| #endif |
| |
| res = VG_(do_syscall2)(__NR_tkill, tid, signo); |
| |
| if (res.isError && res.val == VKI_ENOSYS) |
| res = VG_(do_syscall2)(__NR_kill, tid, signo); |
| |
| return res.isError ? -1 : 0; |
| } |
| |
| Int VG_(sigpending) ( vki_sigset_t* set ) |
| { |
| // Nb: AMD64/Linux doesn't have __NR_sigpending; it only provides |
| // __NR_rt_sigpending. This function will have to be abstracted in some |
| // way to account for this. In the meantime, the easy option is to forget |
| // about it for AMD64 until it's needed. |
| #if defined(VGA_amd64) |
| I_die_here; |
| #else |
| SysRes res = VG_(do_syscall1)(__NR_sigpending, (UWord)set); |
| return res.isError ? -1 : 0; |
| #endif |
| } |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end ---*/ |
| /*--------------------------------------------------------------------*/ |