diff options
Diffstat (limited to 'signal.c')
-rw-r--r-- | signal.c | 43 |
1 files changed, 43 insertions, 0 deletions
@@ -870,6 +870,45 @@ trap_ensure(struct trap_arg *arg) } #endif +int reserved_signal_p(int signo) +{ +/* Synchronous signal can't deliver to main thread */ +#ifdef SIGSEGV + if (signo == SIGSEGV) + return 1; +#endif +#ifdef SIGBUS + if (signo == SIGBUS) + return 1; +#endif +#ifdef SIGILL + if (signo == SIGILL) + return 1; +#endif +#ifdef SIGFPE + if (signo == SIGFPE) + return 1; +#endif + +/* used ubf internal see thread_pthread.c. */ +#ifdef SIGVTALRM + if (signo == SIGVTALRM) + return 1; +#endif + +/* On some OSs, wait() never return if SIGCHLD handler is installed. */ +#ifdef SIGCHLD + if (signo == SIGCHLD) + return 1; +#endif +#ifdef SIGCLD + if (signo == SIGCLD) + return 1; +#endif + + return 0; +} + /* * call-seq: * Signal.trap( signal, command ) -> obj @@ -912,6 +951,10 @@ sig_trap(int argc, VALUE *argv) } arg.sig = trap_signm(argv[0]); + if (reserved_signal_p(arg.sig)) { + rb_raise(rb_eArgError, "can't trap reserved signal"); + } + if (argc == 1) { arg.cmd = rb_block_proc(); arg.func = sighandler; |