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Kernel: Rewrite whole scheduler

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Current context saving was very hacky and dependant on compiler
behaviour that was not consistent. Now we always use iret for
context saving. This makes everything more clean.
This commit is contained in:
Bananymous
2024-03-29 18:02:12 +02:00
parent 1b65f850ee
commit 5050047cef
18 changed files with 364 additions and 364 deletions
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30
kernel/kernel/Process.cpp
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@@ -127,9 +127,6 @@ namespace Kernel
}
process->m_loadable_elf->reserve_address_space();
process->m_is_userspace = true;
process->m_userspace_info.entry = process->m_loadable_elf->entry_point();
char** argv = nullptr;
{
size_t needed_bytes = sizeof(char*) * 2 + path.size() + 1;
@@ -155,6 +152,8 @@ namespace Kernel
MUST(process->m_mapped_regions.push_back(BAN::move(argv_region)));
}
process->m_is_userspace = true;
process->m_userspace_info.entry = process->m_loadable_elf->entry_point();
process->m_userspace_info.argc = 1;
process->m_userspace_info.argv = argv;
process->m_userspace_info.envp = nullptr;
@@ -207,7 +206,7 @@ namespace Kernel
m_exit_status.semaphore.unblock();
while (m_exit_status.waiting > 0)
Scheduler::get().reschedule();
Scheduler::get().yield();
m_process_lock.lock();
@@ -220,7 +219,7 @@ namespace Kernel
bool Process::on_thread_exit(Thread& thread)
{
ASSERT(Processor::get_interrupt_state() == InterruptState::Disabled);
LockGuard _(m_process_lock);
ASSERT(m_threads.size() > 0);
@@ -228,8 +227,6 @@ namespace Kernel
{
ASSERT(m_threads.front() == &thread);
m_threads.clear();
thread.setup_process_cleanup();
return true;
}
@@ -248,11 +245,18 @@ namespace Kernel
void Process::exit(int status, int signal)
{
m_exit_status.exit_code = __WGENEXITCODE(status, signal);
for (auto* thread : m_threads)
if (thread != &Thread::current())
Scheduler::get().terminate_thread(thread);
if (this == &Process::current())
Scheduler::get().terminate_thread(&Thread::current());
while (!m_threads.empty())
m_threads.front()->on_exit();
//for (auto* thread : m_threads)
// if (thread != &Thread::current())
// Scheduler::get().terminate_thread(thread);
//if (this == &Process::current())
//{
// m_threads.clear();
// Processor::set_interrupt_state(InterruptState::Disabled);
// Thread::current().setup_process_cleanup();
// Scheduler::get().yield();
//}
}
size_t Process::proc_meminfo(off_t offset, BAN::ByteSpan buffer) const
@@ -533,7 +537,7 @@ namespace Kernel
m_has_called_exec = true;
m_threads.front()->setup_exec();
Scheduler::get().execute_current_thread();
Scheduler::get().yield();
ASSERT_NOT_REACHED();
}