add a test program that can be wrapped with LD_PRELOAD

1 files changed, 22 insertions, 0 deletions

diff --git a/test/wrapper.c b/test/wrapper.c
new file mode 100644
index 0000000..a260894
--- /dev/null
+++ b/test/wrapper.c
@@ -0,0 +1,22 @@
+#define _POSIX_C_SOURCE 200809L
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+int main(void)
+{
+	const char buf[] = "THIS IS A CONSTANT STRING";
+
+	char *ptr = realloc(NULL, sizeof(buf));
+	memcpy(ptr, buf, sizeof(buf));
+	printf("%p: %s\n", ptr, ptr);
+
+	ptr = realloc(ptr, sizeof(buf) * 2);
+	memcpy(ptr + sizeof(buf) - 1, buf, sizeof(buf));
+	printf("%p: %s\n", ptr, ptr);
+
+	ptr = realloc(ptr, sizeof(buf) * sysconf(_SC_PAGESIZE));
+	memcpy(ptr + (2 * sizeof(buf)) - 2, buf, sizeof(buf));
+	printf("%p: %s\n", ptr, ptr);
+}