X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flib%2Fdebug.c;h=6d7c9e13bf064761b1496a232994040498b4c5d2;hb=615bf3b3d2a8573ed6fb9ddc0055745e163ac999;hp=66e911926a4cced405ac13b13d79a4a24dd40f14;hpb=7a3dff52c8a44deeadd071ea93f19b9cee2a67fa;p=pintos-anon

diff --git a/src/lib/debug.c b/src/lib/debug.c
index 66e9119..6d7c9e1 100644
--- a/src/lib/debug.c
+++ b/src/lib/debug.c
@@ -4,53 +4,6 @@
 #include <stddef.h>
 #include <stdio.h>
 #include <string.h>
-#ifdef KERNEL
-#include "threads/init.h"
-#include "threads/interrupt.h"
-#include "devices/serial.h"
-#else
-#include <syscall.h>
-#endif
-
-/* Halts the OS or user program, printing the source file name,
-   line number, and function name, plus a user-specific
-   message. */
-void
-debug_panic (const char *file, int line, const char *function,
-             const char *message, ...)
-{
-  va_list args;
-
-#ifdef KERNEL
-  intr_disable ();
-#endif
-
-#ifdef KERNEL
-  printf ("Kernel PANIC at %s:%d in %s(): ", file, line, function);
-#else
-  printf ("User process panic at %s:%d in %s(): ", file, line, function);
-#endif
-
-  va_start (args, message);
-  vprintf (message, args);
-  printf ("\n");
-  va_end (args);
-
-  debug_backtrace ();
-
-  printf ("The `backtrace' program can make call stacks useful.\n"
-          "Read \"Backtraces\" in the \"Debugging Tools\" chapter\n"
-          "of the Pintos documentation for more information.\n");
-  
-#ifdef KERNEL
-  serial_flush ();
-  if (power_off_when_done)
-    power_off ();
-  for (;;);
-#else
-  exit (1);
-#endif
-}
 
 /* Prints the call stack, that is, a list of addresses, one in
    each of the functions we are nested within.  gdb or addr2line
@@ -59,6 +12,7 @@ debug_panic (const char *file, int line, const char *function,
 void
 debug_backtrace (void) 
 {
+  static bool explained;
   void **frame;
   
   printf ("Call stack:");
@@ -67,4 +21,12 @@ debug_backtrace (void)
        frame = frame[0]) 
     printf (" %p", frame[1]);
   printf (".\n");
+
+  if (!explained) 
+    {
+      explained = true;
+      printf ("The `backtrace' program can make call stacks useful.\n"
+              "Read \"Backtraces\" in the \"Debugging Tools\" chapter\n"
+              "of the Pintos documentation for more information.\n");
+    }
 }