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src/hotspot/os/linux/os_linux.cpp
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*** 423,444 ****
// signal support
debug_only(static bool signal_sets_initialized = false);
static sigset_t unblocked_sigs, vm_sigs;
- bool os::Linux::is_sig_ignored(int sig) {
- struct sigaction oact;
- sigaction(sig, (struct sigaction*)NULL, &oact);
- void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction)
- : CAST_FROM_FN_PTR(void*, oact.sa_handler);
- if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) {
- return true;
- } else {
- return false;
- }
- }
-
void os::Linux::signal_sets_init() {
// Should also have an assertion stating we are still single-threaded.
assert(!signal_sets_initialized, "Already initialized");
// Fill in signals that are necessarily unblocked for all threads in
// the VM. Currently, we unblock the following signals:
--- 423,432 ----
*** 462,478 ****
sigaddset(&unblocked_sigs, SIGTRAP);
#endif
sigaddset(&unblocked_sigs, SR_signum);
if (!ReduceSignalUsage) {
! if (!os::Linux::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
}
! if (!os::Linux::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
}
! if (!os::Linux::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
}
}
// Fill in signals that are blocked by all but the VM thread.
sigemptyset(&vm_sigs);
--- 450,466 ----
sigaddset(&unblocked_sigs, SIGTRAP);
#endif
sigaddset(&unblocked_sigs, SR_signum);
if (!ReduceSignalUsage) {
! if (!os::Posix::is_sig_ignored(SHUTDOWN1_SIGNAL)) {
sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL);
}
! if (!os::Posix::is_sig_ignored(SHUTDOWN2_SIGNAL)) {
sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL);
}
! if (!os::Posix::is_sig_ignored(SHUTDOWN3_SIGNAL)) {
sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL);
}
}
// Fill in signals that are blocked by all but the VM thread.
sigemptyset(&vm_sigs);
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