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Kernel: Sending a signal to a process now goes to the main thread

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Instead of falling back to the suspicious "any_thread()" mechanism,
just fail with ESRCH if you try to kill() a PID that doesn't have a
corresponding TID.
This commit is contained in:
Andreas Kling 2020-05-16 12:33:48 +02:00
parent c9e38c5255
commit 0e7f85c24a
Notes: sideshowbarker 2024-07-19 06:36:42 +09:00
2 changed files with 8 additions and 9 deletions
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13
Kernel/Process.cpp
View file

@ -2179,7 +2179,7 @@ KResult Process::do_kill(Process& process, int signal)
return KResult(-EPERM); return KResult(-EPERM);
} }
if (signal != 0) if (signal != 0)
process.send_signal(signal, this); return process.send_signal(signal, this);
return KSuccess; return KSuccess;
} }
@ -3781,15 +3781,14 @@ void Process::terminate_due_to_signal(u8 signal)
die(); die();
} }
void Process::send_signal(u8 signal, Process* sender) KResult Process::send_signal(u8 signal, Process* sender)
{ {
InterruptDisabler disabler; InterruptDisabler disabler;
if (!m_thread_count) if (auto* thread = Thread::from_tid(m_pid)) {
return;
auto* thread = Thread::from_tid(m_pid);
if (!thread)
thread = &any_thread();
thread->send_signal(signal, sender); thread->send_signal(signal, sender);
return KSuccess;
}
return KResult(-ESRCH);
} }
int Process::sys$create_thread(void* (*entry)(void*), const Syscall::SC_create_thread_params* user_params) int Process::sys$create_thread(void* (*entry)(void*), const Syscall::SC_create_thread_params* user_params)

2
Kernel/Process.h
View file

@ -382,7 +382,7 @@ public:
bool is_being_inspected() const { return m_inspector_count; } bool is_being_inspected() const { return m_inspector_count; }
void terminate_due_to_signal(u8 signal); void terminate_due_to_signal(u8 signal);
void send_signal(u8, Process* sender); KResult send_signal(u8 signal, Process* sender);
u16 thread_count() const { return m_thread_count; } u16 thread_count() const { return m_thread_count; }