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Kernel: Fix default ignored signals 

SIGWINCH and SIGCANCEL ended up interrupting functions even when they
were marked as SIG_DFL. Now resizing the userspace terminal emulator
does not get interrupted!
This commit is contained in:
Bananymous 2025-08-18 13:36:59 +03:00
parent 0f52f49188
commit 32d7f429f8
1 changed files with 22 additions and 9 deletions
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31
kernel/kernel/Thread.cpp
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@ -69,6 +69,20 @@ namespace Kernel
s_default_sse_storage_initialized = true;
}
static bool is_default_ignored_signal(int signal)
{
switch (signal)
{
case SIGCHLD:
case SIGURG:
case SIGWINCH:
case SIGCANCEL:
return true;
default:
return false;
}
}
BAN::ErrorOr<Thread*> Thread::create_kernel(entry_t entry, void* data)
{
// Create the thread object
@ -467,7 +481,7 @@ namespace Kernel
}
if (signal_handler == (vaddr_t)SIG_IGN)
continue;
if (signal_handler == (vaddr_t)SIG_DFL && (i == SIGCHLD || i == SIGURG))
if (signal_handler == (vaddr_t)SIG_DFL && is_default_ignored_signal(i))
continue;
return true;
}
@ -582,14 +596,8 @@ namespace Kernel
process().exit(128 + signal, signal);
ASSERT_NOT_REACHED();
// Ignore the signal
case SIGCHLD:
case SIGURG:
case SIGWINCH:
case SIGCANCEL:
break;
// Stop the process:
case SIGSTOP:
case SIGTSTP:
case SIGTTIN:
case SIGTTOU:
@ -598,6 +606,11 @@ namespace Kernel
// Continue the process, if it is stopped; otherwise, ignore the signal.
case SIGCONT:
ASSERT_NOT_REACHED();
default:
if (is_default_ignored_signal(signal))
break;
panic("Executing unhandled signal {}", signal);
}
}
@ -619,7 +632,7 @@ namespace Kernel
}
if (signal_handler == (vaddr_t)SIG_IGN)
return false;
if (signal_handler == (vaddr_t)SIG_DFL && (signal == SIGCHLD || signal == SIGURG))
if (signal_handler == (vaddr_t)SIG_DFL && is_default_ignored_signal(signal))
return false;
}
uint64_t mask = 1ull << signal;