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Kernel: If a signal is ignored, make sure we unset BlockedSignal state.

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This commit is contained in:
Andreas Kling 2019-05-22 13:23:41 +02:00
parent c048ded470
commit 8098d2e337
Notes: sideshowbarker 2024-07-19 13:59:23 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/8098d2e337c
1 changed files with 9 additions and 5 deletions
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14
Kernel/Thread.cpp
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@ -5,6 +5,8 @@
#include <Kernel/VM/MemoryManager.h>
#include <LibC/signal_numbers.h>
//#define SIGNAL_DEBUG
HashTable<Thread*>& thread_table()
{
ASSERT_INTERRUPTS_DISABLED();
@ -293,7 +295,7 @@ ShouldUnblockThread Thread::dispatch_signal(byte signal)
ASSERT(signal < 32);
#ifdef SIGNAL_DEBUG
kprintf("dispatch_signal %s(%u) <- %u\n", name().characters(), pid(), signal);
kprintf("dispatch_signal %s(%u) <- %u\n", process().name().characters(), pid(), signal);
#endif
auto& action = m_signal_action_data[signal];
@ -322,6 +324,8 @@ ShouldUnblockThread Thread::dispatch_signal(byte signal)
m_process.terminate_due_to_signal(signal);
return ShouldUnblockThread::No;
case DefaultSignalAction::Ignore:
if (state() == BlockedSignal)
set_state(Runnable);
return ShouldUnblockThread::No;
case DefaultSignalAction::Continue:
return ShouldUnblockThread::Yes;
@ -331,7 +335,7 @@ ShouldUnblockThread Thread::dispatch_signal(byte signal)
if (handler_laddr.as_ptr() == SIG_IGN) {
#ifdef SIGNAL_DEBUG
kprintf("%s(%u) ignored signal %u\n", name().characters(), pid(), signal);
kprintf("%s(%u) ignored signal %u\n", process().name().characters(), pid(), signal);
#endif
return ShouldUnblockThread::Yes;
}
@ -357,12 +361,12 @@ ShouldUnblockThread Thread::dispatch_signal(byte signal)
if (interrupting_in_kernel) {
#ifdef SIGNAL_DEBUG
kprintf("dispatch_signal to %s(%u) in state=%s with return to %w:%x\n", name().characters(), pid(), to_string(state()), ret_cs, ret_eip);
kprintf("dispatch_signal to %s(%u) in state=%s with return to %w:%x\n", process().name().characters(), pid(), to_string(state()), ret_cs, ret_eip);
#endif
ASSERT(is_blocked());
m_tss_to_resume_kernel = make<TSS32>(m_tss);
#ifdef SIGNAL_DEBUG
kprintf("resume tss pc: %w:%x stack: %w:%x flags: %x cr3: %x\n", m_tss_to_resume_kernel.cs, m_tss_to_resume_kernel->eip, m_tss_to_resume_kernel->ss, m_tss_to_resume_kernel->esp, m_tss_to_resume_kernel->eflags, m_tss_to_resume_kernel->cr3);
kprintf("resume tss pc: %w:%x stack: %w:%x flags: %x cr3: %x\n", m_tss_to_resume_kernel->cs, m_tss_to_resume_kernel->eip, m_tss_to_resume_kernel->ss, m_tss_to_resume_kernel->esp, m_tss_to_resume_kernel->eflags, m_tss_to_resume_kernel->cr3);
#endif
if (!m_signal_stack_user_region) {
@ -420,7 +424,7 @@ ShouldUnblockThread Thread::dispatch_signal(byte signal)
set_state(Skip1SchedulerPass);
#ifdef SIGNAL_DEBUG
kprintf("signal: Okay, %s(%u) {%s} has been primed with signal handler %w:%x\n", name().characters(), pid(), to_string(state()), m_tss.cs, m_tss.eip);
kprintf("signal: Okay, %s(%u) {%s} has been primed with signal handler %w:%x\n", process().name().characters(), pid(), to_string(state()), m_tss.cs, m_tss.eip);
#endif
return ShouldUnblockThread::Yes;
}