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Kernel: Implement process stopping and continuing

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Bananymous
2025-08-31 00:34:52 +03:00
parent 56684e753b
commit 791a541381
6 changed files with 311 additions and 125 deletions
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20
kernel/include/kernel/Process.h
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@@ -188,6 +188,9 @@ namespace Kernel
BAN::ErrorOr<long> sys_tty_ctrl(int fildes, int command, int flags);
void set_stopped(bool stopped, int signal);
void wait_while_stopped();
static BAN::ErrorOr<void> kill(pid_t pid, int signal);
BAN::ErrorOr<long> sys_kill(pid_t pid, int signal);
BAN::ErrorOr<long> sys_sigaction(int signal, const struct sigaction* act, struct sigaction* oact);
@@ -299,12 +302,11 @@ namespace Kernel
}
private:
struct ChildExitStatus
struct ChildWaitStatus
{
pid_t pid { 0 };
pid_t pgrp { 0 };
int exit_code { 0 };
bool exited { false };
pid_t pid { 0 };
pid_t pgrp { 0 };
BAN::Optional<int> status;
};
Credentials m_credentials;
@@ -320,6 +322,9 @@ namespace Kernel
mutable Mutex m_process_lock;
BAN::Atomic<bool> m_stopped { false };
ThreadBlocker m_stop_blocker;
VirtualFileSystem::File m_working_directory;
VirtualFileSystem::File m_root_file;
@@ -344,8 +349,9 @@ namespace Kernel
BAN::Vector<BAN::String> m_environ;
BAN::String m_executable;
BAN::Vector<ChildExitStatus> m_child_exit_statuses;
ThreadBlocker m_child_exit_blocker;
BAN::Vector<ChildWaitStatus> m_child_wait_statuses;
SpinLock m_child_wait_lock;
ThreadBlocker m_child_wait_blocker;
BAN::Atomic<bool> m_is_exiting { false };

9
kernel/include/kernel/Thread.h
View File

@@ -53,7 +53,7 @@ namespace Kernel
BAN::ErrorOr<void> initialize_userspace(vaddr_t entry, BAN::Span<BAN::String> argv, BAN::Span<BAN::String> envp, BAN::Span<LibELF::AuxiliaryVector> auxv);
// Returns true, if thread is going to trigger signal
bool is_interrupted_by_signal() const;
bool is_interrupted_by_signal(bool skip_stop_and_cont = false) const;
// Returns true if pending signal can be added to thread
bool can_add_signal_to_execute() const;
@@ -63,6 +63,13 @@ namespace Kernel
void add_signal(int signal);
void set_suspend_signal_mask(uint64_t sigmask);
static bool is_stopping_signal(int signal);
static bool is_continuing_signal(int signal);
static bool is_terminating_signal(int signal);
static bool is_abnormal_terminating_signal(int signal);
static bool is_realtime_signal(int signal);
bool will_exit_because_of_signal() const;
BAN::ErrorOr<void> sigaltstack(const stack_t* ss, stack_t* oss);
// blocks current thread and returns either on unblock, eintr, spuriously or after timeout