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[kernel] Add userspace threading

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Implement the syscalls necessary for threads to create other threads in
their same process. This involved rearranging a number of syscalls, as
well as implementing object_wait and a basic implementation of a
process' list of handles.
This commit is contained in:
Justin C. Miller
2020-07-26 16:02:38 -07:00
parent 4cf222a5bb
commit ae3290c53d
22 changed files with 481 additions and 255 deletions
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57
src/kernel/syscalls/process.cpp
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@@ -1,28 +1,13 @@
#include "j6/errors.h"
#include "j6/types.h"
#include "objects/process.h"
#include "log.h"
#include "objects/process.h"
#include "objects/thread.h"
#include "scheduler.h"
namespace syscalls {
j6_status_t
process_exit(int64_t status)
{
auto &s = scheduler::get();
TCB *tcb = s.current();
thread *th = thread::from_tcb(tcb);
log::debug(logs::syscall, "Thread %llx exiting with code %d", th->koid(), status);
th->exit(status);
s.schedule();
log::error(logs::syscall, "returned to exit syscall");
return j6_err_unexpected;
}
j6_status_t
process_koid(j6_koid_t *koid)
{
@@ -38,41 +23,19 @@ process_koid(j6_koid_t *koid)
}
j6_status_t
process_log(const char *message)
{
if (message == nullptr) {
return j6_err_invalid_arg;
}
auto &s = scheduler::get();
TCB *tcb = s.current();
thread *th = thread::from_tcb(tcb);
log::info(logs::syscall, "Message[%llx]: %s", th->koid(), message);
return j6_status_ok;
}
j6_status_t
process_pause()
process_exit(int64_t status)
{
auto &s = scheduler::get();
TCB *tcb = s.current();
thread *th = thread::from_tcb(tcb);
th->wait_on_signals(th, -1ull);
process &p = thread::from_tcb(tcb)->parent();
log::debug(logs::syscall, "Process %llx exiting with code %d", p.koid(), status);
p.exit(status);
s.schedule();
return j6_status_ok;
}
j6_status_t
process_sleep(uint64_t til)
{
auto &s = scheduler::get();
TCB *tcb = s.current();
thread *th = thread::from_tcb(tcb);
log::debug(logs::syscall, "Thread %llx sleeping until %llu", th->koid(), til);
th->wait_on_time(til);
s.schedule();
return j6_status_ok;
log::error(logs::syscall, "returned to exit syscall");
return j6_err_unexpected;
}
} // namespace syscalls