1 files changed, 69 insertions, 0 deletions
diff --git a/frida_mode/test/osx-lib/harness.c b/frida_mode/test/osx-lib/harness.c
new file mode 100644
index 00000000..3d427b4a
--- /dev/null
+++ b/frida_mode/test/osx-lib/harness.c
@@ -0,0 +1,69 @@
+#include <string.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+
+
+//typedef for our exported target function.
+typedef void (*CRASHME)(const uint8_t *Data, size_t Size);
+
+//globals
+CRASHME fpn_crashme = NULL;
+
+
+int LLVMFuzzerTestOneInput(const unsigned char* data, size_t size){
+    fpn_crashme(data, size);
+    return 0;
+}
+
+int main(int argc, const char * argv[])
+{
+
+    for (int i = 1; i < argc; i++) {
+        fprintf(stderr, "Running: %s\n", argv[i]);
+        FILE *f = fopen(argv[i], "r");
+        assert(f);
+        fseek(f, 0, SEEK_END);
+        size_t len = ftell(f);
+        fseek(f, 0, SEEK_SET);
+        unsigned char *buf = (unsigned char*)malloc(len);
+        size_t n_read = fread(buf, 1, len, f);
+        fclose(f);
+        assert(n_read == len);
+        LLVMFuzzerTestOneInput(buf, len);
+        free(buf);
+        fprintf(stderr, "Done:    %s: (%zd bytes)\n", argv[i], n_read);
+    }
+
+    return 0;
+}
+
+__attribute__((constructor()))
+void constructor(void) {
+    // handles to required libs
+    void *dylib = NULL;
+
+    dylib = dlopen("./libcrashme.dylib", RTLD_NOW);
+    if (dylib == NULL)
+    {
+
+        printf("[-] Failed to load lib\n");
+        printf("[-] Dlerror: %s\n", dlerror());
+        exit(1);
+
+    }
+
+    printf("[+] Resolve function\n");
+
+    fpn_crashme = (CRASHME)dlsym(dylib, "crashme");
+    if (!fpn_crashme)
+    {
+
+        printf("[-] Failed to find function\n");
+        exit(1);
+
+    }
+
+    printf("[+] Found function.\n");
+}