diff options
Diffstat (limited to 'signal.c')
| -rw-r--r-- | signal.c | 14 |
1 files changed, 13 insertions, 1 deletions
@@ -826,6 +826,15 @@ signal_exec(VALUE cmd, int safe, int sig) volatile unsigned long old_interrupt_mask = cur_th->interrupt_mask; int state; + /* + * workaround the following race: + * 1. signal_enque queues signal for execution + * 2. user calls trap(sig, "IGNORE"), setting SIG_IGN + * 3. rb_signal_exec runs on queued signal + */ + if (IMMEDIATE_P(cmd)) + return; + cur_th->interrupt_mask |= TRAP_INTERRUPT_MASK; TH_PUSH_TAG(cur_th); if ((state = EXEC_TAG()) == 0) { @@ -977,7 +986,7 @@ trap_handler(VALUE *cmd, int sig) if (strncmp(RSTRING_PTR(command), "SIG_IGN", 7) == 0) { sig_ign: func = SIG_IGN; - *cmd = 0; + *cmd = Qtrue; } else if (strncmp(RSTRING_PTR(command), "SIG_DFL", 7) == 0) { sig_dfl: @@ -1058,11 +1067,14 @@ trap(int sig, sighandler_t func, VALUE command) oldcmd = vm->trap_list[sig].cmd; switch (oldcmd) { case 0: + case Qtrue: if (oldfunc == SIG_IGN) oldcmd = rb_str_new2("IGNORE"); else if (oldfunc == SIG_DFL) oldcmd = rb_str_new2("SYSTEM_DEFAULT"); else if (oldfunc == sighandler) oldcmd = rb_str_new2("DEFAULT"); else oldcmd = Qnil; break; + case Qnil: + break; case Qundef: oldcmd = rb_str_new2("EXIT"); break; |