diff options
Diffstat (limited to 'signal.c')
| -rw-r--r-- | signal.c | 32 |
1 files changed, 23 insertions, 9 deletions
@@ -50,7 +50,7 @@ volatile sig_atomic_t async_sig_enabled = 0; static volatile sig_atomic_t interrupt_count = 0; -sigset_t sig_blocked_cache; +small_sigset_t sig_blocked_cache; static val sig_lambda[MAX_SIG]; volatile unsigned long sig_deferred; @@ -69,7 +69,9 @@ static int is_cpu_exception(int sig) static int sig_reload_cache(void) { - return sigprocmask(SIG_BLOCK, 0, &sig_blocked_cache); + sigset_t set; + return sigprocmask(SIG_BLOCK, 0, &set); + memcpy(&sig_blocked_cache, &set, sizeof sig_blocked_cache); } static void sig_handler(int sig) @@ -246,14 +248,19 @@ static void teardown_alt_stack(void) #endif +static void small_sigfillset(small_sigset_t *ss) +{ + ss->set = (uint_ptr_t) -1; +} + val set_sig_handler(val signo, val lambda) { static struct sigaction blank; cnum sig = c_num(signo); val old_lambda; - sigset_t block, saved; + small_sigset_t block, saved; - sigfillset(&block); + small_sigfillset(&block); sig_mask(SIG_BLOCK, &block, &saved); if (sig < 0 || sig >= MAX_SIG) @@ -342,10 +349,10 @@ static void mem_clr_bits(mem_t *target, const mem_t *bits, size_t size) *target++ &= ~*bits++; } -int sig_mask(int how, const sigset_t *set, sigset_t *oldset) +int sig_mask(int how, const small_sigset_t *set, small_sigset_t *oldset) { - sigset_t newset; - const sigset_t *pnew; + small_sigset_t newset; + const small_sigset_t *pnew; switch (how) { case SIG_SETMASK: @@ -367,11 +374,18 @@ int sig_mask(int how, const sigset_t *set, sigset_t *oldset) } if (memcmp(&sig_blocked_cache, pnew, sizeof *pnew) != 0) { + static sigset_t blank; + sigset_t real_newset = blank, real_oldset; sig_blocked_cache = *pnew; + int ret; #if HAVE_VALGRIND - VALGRIND_MAKE_MEM_DEFINED(oldset, sizeof *oldset); + VALGRIND_MAKE_MEM_DEFINED(real_oldset, sizeof real_oldset); #endif - return sigprocmask(SIG_SETMASK, &sig_blocked_cache, oldset); + memcpy(&real_newset, &sig_blocked_cache, sizeof sig_blocked_cache); + ret = sigprocmask(SIG_SETMASK, &real_newset, &real_oldset); + if (ret == 0 && oldset != 0) + memcpy(oldset, &real_oldset, sizeof *oldset); + return ret; } if (oldset != 0) |