Merge pull request #17 from timsifive/debug

Add end-to-end debug tests

1 files changed, 51 insertions, 0 deletions

diff --git a/debug/programs/debug.c b/debug/programs/debug.c
new file mode 100644
index 0000000..20b1cdc
--- /dev/null
+++ b/debug/programs/debug.c
@@ -0,0 +1,51 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+unsigned int crc32a(uint8_t *message, unsigned int size);
+
+void rot13(char *buf)
+{
+    while (*buf) {
+        if ((*buf >= 'a' && *buf <= 'm') ||
+                (*buf >= 'A' && *buf <= 'M')) {
+            *buf += 13;
+        } else if ((*buf >= 'n' && *buf <= 'z') ||
+                (*buf >= 'N' && *buf <= 'Z')) {
+            *buf -= 13;
+        }
+        buf++;
+    }
+}
+
+size_t strlen(const char *buf)
+{
+    int len = 0;
+    while (buf[len])
+        len++;
+    return len;
+}
+
+extern void *__malloc_freelist;
+
+int main()
+{
+    __malloc_freelist = 0;
+
+    volatile int i = 0;
+    int j = 0;
+    char *fox = "The quick brown fox jumps of the lazy dog.";
+    unsigned int checksum = 0;
+
+start:
+    while (i)
+        j++;
+
+    rot13(fox);
+    checksum ^= crc32a(fox, strlen(fox));
+    rot13(fox);
+    checksum ^= crc32a(fox, strlen(fox));
+
+    return checksum;
+}