From 3c40bca512369771c717c00b41d9bde6c923af63 Mon Sep 17 00:00:00 2001
From: h2-addad <hamza2.addad@live.uwe.ac.uk>
Date: Sun, 16 Jul 2023 01:19:36 +0000
Subject: [PATCH] Update
---
src/lib/debug.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
create mode 100644 src/lib/debug.c
diff --git a/src/lib/debug.c b/src/lib/debug.c
new file mode 100644
index 0000000..b4f8c2d
--- /dev/null
+++ b/src/lib/debug.c
@@ -0,0 +1,32 @@
+#include <debug.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+
+/* 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)
+{
+ static bool explained;
+ void **frame;
+
+ printf ("Call stack: %p", __builtin_return_address (0));
+ for (frame = __builtin_frame_address (1);
+ (uintptr_t) frame >= 0x1000 && frame[0] != NULL;
+ 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");
+ }
+}
--
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