Simplify patch_test

Author: elicn

examples/src/linux/patch_test.bin.c

@@ -1,20 +1,19 @@
-#include <stdio.h>
 #include <string.h>
 
 #include "patch_test.so.h"
 
 int main(int argc, const char **argv)
 {
-    int ret;
-    const char *p;
+    const char* p = patch_test_value;
 
-    p = patch_test_value;
-
-    ret = strcmp(p, "qiling");
-    if (ret) {
-        /* crash */
-        memcpy(NULL, p, 4);
+    if (strcmp(p, "qiling"))
+    {
+        /* crash with an illegal instruction */
+        __builtin_trap();
     }
 
     return 0;
 }
+
+// run:
+//   LD_LIBRARY_PATH=. ./patch_test.bin