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src: call unmask after install signal handler #59059

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Merged
merged 1 commit into from
Jul 25, 2025
+9 −5
Merged

src: call unmask after install signal handler #59059

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9 changes: 5 additions & 4 deletions src/inspector_agent.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -123,12 +123,11 @@ static int StartDebugSignalHandler() {
CHECK_EQ(0, pthread_sigmask(SIG_SETMASK, &sigmask, &savemask));
sigmask = savemask;
pthread_t thread;
const int err = pthread_create(&thread, &attr,
StartIoThreadMain, nullptr);
// Restore original mask
CHECK_EQ(0, pthread_sigmask(SIG_SETMASK, &sigmask, nullptr));
const int err = pthread_create(&thread, &attr, StartIoThreadMain, nullptr);
CHECK_EQ(0, pthread_attr_destroy(&attr));
if (err != 0) {
// Restore original mask
CHECK_EQ(0, pthread_sigmask(SIG_SETMASK, &sigmask, nullptr));
fprintf(stderr, "node[%u]: pthread_create: %s\n",
uv_os_getpid(), strerror(err));
fflush(stderr);
Expand All @@ -137,6 +136,8 @@ static int StartDebugSignalHandler() {
return -err;
}
RegisterSignalHandler(SIGUSR1, StartIoThreadWakeup);
// Restore original mask
CHECK_EQ(0, pthread_sigmask(SIG_SETMASK, &sigmask, nullptr));
// Unblock SIGUSR1. A pending SIGUSR1 signal will now be delivered.
sigemptyset(&sigmask);
sigaddset(&sigmask, SIGUSR1);
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5 changes: 4 additions & 1 deletion src/node_watchdog.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -308,7 +308,10 @@ int SigintWatchdogHelper::Start() {
CHECK_EQ(0, pthread_sigmask(SIG_SETMASK, &sigmask, &savemask));
sigmask = savemask;
int ret = pthread_create(&thread_, nullptr, RunSigintWatchdog, nullptr);
CHECK_EQ(0, pthread_sigmask(SIG_SETMASK, &sigmask, nullptr));

auto cleanup = OnScopeLeave(
[&]() { CHECK_EQ(0, pthread_sigmask(SIG_SETMASK, &sigmask, nullptr)); });

if (ret != 0) {
return ret;
}
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