Fixed Segfault if execve fails, fixed errors in LibC pertaining to stdin,... not...

[tpg/acess2.git] / Kernel / threads.c

diff --git a/Kernel/threads.c b/Kernel/threads.c
index c89be3f..54438c3 100644 (file)
--- a/Kernel/threads.c
+++ b/Kernel/threads.c
@@ -20,6 +20,7 @@ extern int    Proc_Clone(Uint *Err, Uint Flags);
 // === PROTOTYPES ===
 void   Threads_Init();
 void   Threads_SetName(char *NewName);
+char   *Threads_GetName(int ID);
 void   Threads_SetTickets(int Num);
  int   Threads_WaitTID(int TID, int *status);
 tThread        *Threads_GetThread(Uint TID);
@@ -30,6 +31,7 @@ void  Threads_Kill(tThread *Thread, int Status);
 void   Threads_Yield();
 void   Threads_Sleep();
 void   Threads_Wake(tThread *Thread);
+void   Threads_AddActive(tThread *Thread);
  int   Threads_GetPID();
  int   Threads_GetTID();
  int   Threads_GetUID();
@@ -93,10 +95,9 @@ void Threads_Init()
                cur->ThreadName = "Idle Thread";
                Threads_SetTickets(0);  // Never called randomly
                cur->Quantum = 1;       // 1 slice quantum
+               HALT();
                for(;;) {
-                       Log("---- Idle");
-                       Threads_Dump();
-                       __asm__ __volatile__ ("hlt");   // Just yeilds
+                       HALT(); // Just yeilds
                }
        }
        #endif
@@ -117,6 +118,18 @@ void Threads_SetName(char *NewName)
        strcpy(cur->ThreadName, NewName);
 }
 
+/**
+ * \fn char *Threads_GetName(int ID)
+ * \brief Gets a thread's name
+ */
+char *Threads_GetName(int ID)
+{
+       if(ID == -1) {
+               return Proc_GetCurThread()->ThreadName;
+       }
+       return NULL;
+}
+
 /**
  * \fn void Threads_SetTickets(int Num)
  * \brief Sets the 'priority' of a task
@@ -140,9 +153,7 @@ void Threads_SetTickets(int Num)
  * \brief Wait for a task to change state
  */
 int Threads_WaitTID(int TID, int *status)
-{
-       Threads_Dump();
-       
+{      
        // Any Child
        if(TID == -1) {
                
@@ -258,7 +269,10 @@ tThread *Threads_int_GetPrev(tThread **List, tThread *Thread)
  */
 void Threads_Exit(int TID, int Status)
 {
-       Threads_Kill( Proc_GetCurThread(), (Uint)Status & 0xFF );
+       if( TID == 0 )
+               Threads_Kill( Proc_GetCurThread(), (Uint)Status & 0xFF );
+       else
+               Threads_Kill( Threads_GetThread(TID), (Uint)Status & 0xFF );
 }
 
 /**
@@ -279,7 +293,7 @@ void Threads_Kill(tThread *Thread, int Status)
                        child;
                        child = child->Next)
                {
-                       if(child->PTID == gCurrentThread->TID)
+                       if(child->PTID == Thread->TID)
                                Threads_Kill(child, -1);
                }
        }
@@ -352,7 +366,7 @@ void Threads_Sleep()
        tThread *cur = Proc_GetCurThread();
        tThread *thread;
        
-       //Log("Proc_Sleep: %i going to sleep", gCurrentThread->TID);
+       Log("Proc_Sleep: %i going to sleep", cur->TID);
        
        // Acquire Spinlock
        LOCK( &giThreadListLock );
@@ -425,6 +439,22 @@ void Threads_Wake(tThread *Thread)
        }
 }
 
+/**
+ * \fn void Threads_AddActive(tThread *Thread)
+ * \brief Adds a thread to the active queue
+ */
+void Threads_AddActive(tThread *Thread)
+{
+       LOCK( &giThreadListLock );
+       Thread->Next = gActiveThreads;
+       gActiveThreads = Thread;
+       giNumActiveThreads ++;
+       giTotalTickets += Thread->NumTickets;
+       //Log("Threads_AddActive: giNumActiveThreads = %i, giTotalTickets = %i",
+       //      giNumActiveThreads, giTotalTickets);
+       RELEASE( &giThreadListLock );
+}
+
 #if 0
 /**
  * \fn void Threads_SetSignalHandler(int Num, void *Handler)
@@ -439,6 +469,7 @@ void Threads_SetSignalHandler(int Num, void *Handler)
 
 /**
  * \fn void Threads_SendSignal(int TID, int Num)
+ * \brief Send a signal to a thread
  */
 void Threads_SendSignal(int TID, int Num)
 {
@@ -534,9 +565,13 @@ tThread *Threads_GetNextToRun(int CPU)
                return gActiveThreads;
        }
        
+       //Log(" Threads_GetNextToRun: giNumActiveThreads=%i,giTotalTickets=%i",
+       //      giNumActiveThreads, giTotalTickets);
        // Get the ticket number
        ticket = number = rand() % giTotalTickets;
        
+       //Log(" Threads_GetNextToRun: ticket = %i", ticket);
+       
        // Find the next thread
        for(thread=gActiveThreads;thread;thread=thread->Next)
        {
@@ -556,3 +591,14 @@ tThread *Threads_GetNextToRun(int CPU)
        
        return thread;
 }
+
+/**
+ * \fn void Threads_SegFault(tVAddr Addr)
+ * \brief Called when a Segment Fault occurs
+ */
+void Threads_SegFault(tVAddr Addr)
+{
+       //Threads_SendSignal( Proc_GetCurThread()->TID, SIGSEGV );
+       Log("Thread #%i committed a segfault at address %p\n", Proc_GetCurThread()->TID, Addr);
+       Threads_Exit( 0, 0 );
+}