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Kernel: Threads now use only 4 KiB stack :)

This commit is contained in:
Bananymous 2023-04-12 00:22:08 +03:00
parent f5e676b2b7
commit 12779cdef8
3 changed files with 9 additions and 5 deletions
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4
kernel/include/kernel/Thread.h
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@ -40,6 +40,9 @@ namespace Kernel
State state() const { return m_state; } State state() const { return m_state; }
void terminate() { m_state = State::Terminating; } void terminate() { m_state = State::Terminating; }
uintptr_t stack_base() const { return (uintptr_t)m_stack_base; }
size_t stack_size() const { return m_stack_size; }
static Thread& current() ; static Thread& current() ;
BAN::RefPtr<Process> process(); BAN::RefPtr<Process> process();
@ -50,6 +53,7 @@ namespace Kernel
void on_exit(); void on_exit();
private: private:
static constexpr size_t m_stack_size = 4096 * 1;
void* m_stack_base = nullptr; void* m_stack_base = nullptr;
uintptr_t m_rip = 0; uintptr_t m_rip = 0;
uintptr_t m_rsp = 0; uintptr_t m_rsp = 0;

5
kernel/kernel/Process.cpp
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@ -9,10 +9,11 @@
namespace Kernel namespace Kernel
{ {
static pid_t s_next_pid = 1;
BAN::ErrorOr<BAN::RefPtr<Process>> Process::create_kernel(entry_t entry, void* data) BAN::ErrorOr<BAN::RefPtr<Process>> Process::create_kernel(entry_t entry, void* data)
{ {
static pid_t next_pid = 1; auto process = TRY(BAN::RefPtr<Process>::create(s_next_pid++));
auto process = TRY(BAN::RefPtr<Process>::create(next_pid++));
TRY(process->m_working_directory.push_back('/')); TRY(process->m_working_directory.push_back('/'));
TRY(process->add_thread(entry, data)); TRY(process->add_thread(entry, data));
return process; return process;

5
kernel/kernel/Thread.cpp
View File

@ -10,7 +10,6 @@
namespace Kernel namespace Kernel
{ {
static constexpr size_t thread_stack_size = 16384;
template<size_t size, typename T> template<size_t size, typename T>
static void write_to_stack(uintptr_t& rsp, const T& value) static void write_to_stack(uintptr_t& rsp, const T& value)
@ -45,10 +44,10 @@ namespace Kernel
BAN::ErrorOr<void> Thread::initialize(entry_t entry, void* data) BAN::ErrorOr<void> Thread::initialize(entry_t entry, void* data)
{ {
m_stack_base = kmalloc(thread_stack_size, PAGE_SIZE); m_stack_base = kmalloc(m_stack_size, PAGE_SIZE);
if (m_stack_base == nullptr) if (m_stack_base == nullptr)
return BAN::Error::from_errno(ENOMEM); return BAN::Error::from_errno(ENOMEM);
m_rsp = (uintptr_t)m_stack_base + thread_stack_size; m_rsp = (uintptr_t)m_stack_base + m_stack_size;
m_rip = (uintptr_t)entry; m_rip = (uintptr_t)entry;
write_to_stack<sizeof(void*)>(m_rsp, this); write_to_stack<sizeof(void*)>(m_rsp, this);