Get rid of DEBUG macro, supporting code, and documentation,

[pintos-anon] / src / lib / debug.c

diff --git a/src/lib/debug.c b/src/lib/debug.c
index 577ab67f06c39f60f8fd606d157b6a8a564916bd..66e911926a4cced405ac13b13d79a4a24dd40f14 100644 (file)
--- a/src/lib/debug.c
+++ b/src/lib/debug.c
@@ -1,19 +1,70 @@
-#include "debug.h"
+#include <debug.h>
 #include <stdarg.h>
-#include "interrupt.h"
-#include "lib.h"
+#include <stdbool.h>
+#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
-panic (const char *format, ...)
+debug_panic (const char *file, int line, const char *function,
+             const char *message, ...)
 {
   va_list args;
 
+#ifdef KERNEL
   intr_disable ();
+#endif
 
-  va_start (args, format);
-  vprintk (format, args);
-  printk ("\n");
+#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
+   may be applied to kernel.o to translate these into file names,
+   line numbers, and function names.  */
+void
+debug_backtrace (void) 
+{
+  void **frame;
+  
+  printf ("Call stack:");
+  for (frame = __builtin_frame_address (0);
+       frame != NULL && frame[0] != NULL;
+       frame = frame[0]) 
+    printf (" %p", frame[1]);
+  printf (".\n");
 }