kernel: Add names to threads

kernel/src/arch/x86_64/CPU.cpp

@@ -219,7 +219,8 @@ namespace CPU
 
     void platform_finish_init()
     {
-        Scheduler::new_kernel_thread(io_thread).expect_value("Could not create the IO background thread!");
+        Scheduler::new_kernel_thread(io_thread, "[x86_64-io]")
+            .expect_value("Could not create the IO background thread!");
 
         remap_pic();
     }

kernel/src/main.cpp

@@ -68,7 +68,7 @@ static Result<void> try_init_userspace()
 {
     auto init = TRY(VFS::resolve_path("/bin/init"));
 
-    TRY(Scheduler::new_userspace_thread(init));
+    TRY(Scheduler::new_userspace_thread(init, "/bin/init"));
 
     return {};
 }
@@ -80,7 +80,7 @@ static void init_userspace()
 
 static void create_reaper()
 {
-    Scheduler::new_kernel_thread(reap_thread).release_value();
+    Scheduler::new_kernel_thread(reap_thread, "[reap]").release_value();
 }
 
 static void scan_pci()

kernel/src/sys/exec.cpp

@@ -81,6 +81,8 @@ Result<u64> sys_exec(Registers* regs, SyscallArgs args)
 
     MMU::delete_userspace_page_directory(current->directory);
 
+    current->name = argv[0].chars();
+
     image->apply(current);
 
     MMU::switch_page_directory(current->directory);

kernel/src/thread/Scheduler.cpp

@@ -24,6 +24,7 @@ namespace Scheduler
         g_idle.state = ThreadState::Idle;
         g_idle.is_kernel = true;
         g_idle.parent_id = 0;
+        g_idle.name = "[idle]";
 
         g_idle.ticks_left = 1;
 
@@ -51,7 +52,7 @@ namespace Scheduler
         return &g_idle;
     }
 
-    Result<void> new_kernel_thread_impl(Thread* thread)
+    Result<void> new_kernel_thread_impl(Thread* thread, const char* name)
     {
         // If anything fails, make sure to clean up.
         auto guard = make_scope_guard([&] { delete thread; });
@@ -67,6 +68,8 @@ namespace Scheduler
 
         thread->parent_id = 0;
 
+        thread->name = name;
+
         thread->is_kernel = true;
 
         g_threads.append(thread);
@@ -76,39 +79,40 @@ namespace Scheduler
         return {};
     }
 
-    Result<void> new_kernel_thread(u64 address)
+    Result<void> new_kernel_thread(u64 address, const char* name)
     {
         Thread* const thread = TRY(new_thread());
         thread->init_regs_kernel();
         thread->set_ip(address);
 
-        return new_kernel_thread_impl(thread);
+        return new_kernel_thread_impl(thread, name);
     }
 
-    Result<void> new_kernel_thread(void (*func)(void))
+    Result<void> new_kernel_thread(void (*func)(void), const char* name)
     {
         Thread* const thread = TRY(new_thread());
         thread->init_regs_kernel();
         thread->set_ip((u64)func);
 
-        return new_kernel_thread_impl(thread);
+        return new_kernel_thread_impl(thread, name);
     }
 
-    Result<void> new_kernel_thread(void (*func)(void*), void* arg)
+    Result<void> new_kernel_thread(void (*func)(void*), void* arg, const char* name)
     {
         Thread* const thread = TRY(new_thread());
         thread->init_regs_kernel();
         thread->set_ip((u64)func);
         thread->set_arguments((u64)arg, 0, 0, 0);
 
-        return new_kernel_thread_impl(thread);
+        return new_kernel_thread_impl(thread, name);
     }
 
-    Result<void> new_userspace_thread(SharedPtr<VFS::Inode> inode)
+    Result<void> new_userspace_thread(SharedPtr<VFS::Inode> inode, const char* name)
     {
         Thread* const thread = TRY(new_thread());
 
         thread->is_kernel = false;
+        thread->name = name;
         thread->parent_id = 0;
 
         auto guard = make_scope_guard([&] { delete thread; });

kernel/src/thread/Scheduler.h

@@ -9,11 +9,11 @@ namespace Scheduler
     Thread* current();
     Thread* idle();
 
-    Result<void> new_kernel_thread(u64 address);
-    Result<void> new_kernel_thread(void (*func)(void));
-    Result<void> new_kernel_thread(void (*func)(void*), void* arg);
+    Result<void> new_kernel_thread(u64 address, const char* name);
+    Result<void> new_kernel_thread(void (*func)(void), const char* name);
+    Result<void> new_kernel_thread(void (*func)(void*), void* arg, const char* name);
 
-    Result<void> new_userspace_thread(SharedPtr<VFS::Inode> inode);
+    Result<void> new_userspace_thread(SharedPtr<VFS::Inode> inode, const char* name);
 
     void add_thread(Thread* thread);
 

kernel/src/thread/Thread.h

@@ -7,6 +7,7 @@
 #include <luna/OwnedPtr.h>
 #include <luna/Result.h>
 #include <luna/Stack.h>
+#include <luna/StaticString.h>
 
 #ifdef ARCH_X86_64
 #include "arch/x86_64/CPU.h"
@@ -68,6 +69,8 @@ struct Thread : public LinkedListNode<Thread>
 
     u8 status { 0 };
 
+    StaticString<128> name;
+
     PageDirectory* directory;
 
     bool is_idle()