duct taped posix.dll (just like microsoft), new cursor, more info in the fault handlers, processes now have a parse-it-yourself cmdline, add SYS_WAIT_THREAD and SYS_GET_PROCESS_PID, writing still doesn't work

code/kernel/ke_thread.c

@@ -3,6 +3,7 @@
 #include <intrin.h>
 #include <ke_thread.h>
 #include <ke_sched.h>
+#include <ke_event.h>
 #include <mm_virt.h>
 #include <ob_object.h>
 
@@ -12,6 +13,11 @@ extern void KeThreadEntry(void);
 static void ThreadDestroy(OBJECT* obj) {
     THREAD* thread = CONTAINING_RECORD(obj, THREAD, Header);
 
+    if (thread->ExitEvent) {
+        ObDereferenceObject(&thread->ExitEvent->Header);
+        thread->ExitEvent = (EVENT*)0;
+    }
+
     if (thread->Owner) {
         uintptr_t flags = KeAcquireSpinlock(&thread->Owner->HandleLock);
         ListRemove(&thread->ProcessLink);
@@ -100,6 +106,19 @@ __declspec(dllexport) KSTATUS KeCreateThread(PROCESS* owner, uintptr_t entry, ui
     ObReferenceObject(&owner->Header);
     thread->Owner = owner;
     
+    // Allocate the exit event before the thread becomes visible. Manual-reset
+    // so multiple joiners (if any) all wake up when the thread exits.
+    EVENT* exitEvent;
+    KSTATUS s = KeEventCreate(EventManualReset, 0, &exitEvent);
+    if (!KSUCCESS(s)) {
+        MmFreeUserMemory(ustack, USTACK_SIZE);
+        MmFreePool(kstack);
+        ObDereferenceObject(&owner->Header);
+        ObDereferenceObject(&thread->Header);
+        return s;
+    }
+    thread->ExitEvent = exitEvent;
+
     uintptr_t flags = KeAcquireSpinlock(&owner->HandleLock);
     ListInsertTail(&owner->ThreadList, &thread->ProcessLink);
     owner->ThreadCount++;
@@ -114,6 +133,11 @@ __declspec(dllexport) void KeExitThread(THREAD* thread, int code) {
     (void)code;
     if (!thread) return;
 
+    // Wake any pthread_join waiters before the thread is marked dead and
+    // potentially freed. Manual-reset means all concurrent waiters unblock.
+    if (thread->ExitEvent)
+        KeSignalEvent(thread->ExitEvent);
+
     thread->State = ThreadDead;
 
     KeYield();