objc4-787.1.tar.gz

[apple/objc4.git] / test / libraryPath.c

diff --git a/test/libraryPath.c b/test/libraryPath.c
new file mode 100644 (file)
index 0000000..40cf7bd
--- /dev/null
+++ b/test/libraryPath.c
@@ -0,0 +1,44 @@
+// TEST_CFLAGS -lobjc
+
+#include "test.h"
+#include <dlfcn.h>
+
+// We use DYLD_LIBRARY_PATH to run the tests against a particular copy of
+// libobjc. If this fails somehow (path is wrong, codesigning prevents loading,
+// etc.) then the typical result is a silent failure and we end up testing
+// /usr/lib/libobjc.A.dylib instead. This test detects when DYLD_LIBRARY_PATH is
+// set but libobjc isn't loaded from it.
+int main() {
+    char *dyldLibraryPath = getenv("DYLD_LIBRARY_PATH");
+    testprintf("DYLD_LIBRARY_PATH is %s\n", dyldLibraryPath);
+    if (dyldLibraryPath != NULL && strlen(dyldLibraryPath) > 0) {
+        int foundMatch = 0;
+        
+        dyldLibraryPath = strdup(dyldLibraryPath);
+        
+        Dl_info info;
+        int success = dladdr((void *)objc_msgSend, &info);
+        testassert(success);
+
+        testprintf("libobjc is located at %s\n", info.dli_fname);
+        
+        char *cursor = dyldLibraryPath;
+        char *path;
+        while ((path = strsep(&cursor, ":"))) {
+            char *resolved = realpath(path, NULL);
+            testprintf("Resolved %s to %s\n", path, resolved);
+            testprintf("Comparing %s and %s\n", resolved, info.dli_fname);
+            int comparison = strncmp(resolved, info.dli_fname, strlen(resolved));
+            free(resolved);
+            if (comparison == 0) {
+                testprintf("Found a match!\n");
+                foundMatch = 1;
+                break;
+            }
+        }
+
+        testprintf("Finished searching, foundMatch=%d\n", foundMatch);
+        testassert(foundMatch);
+    }
+    succeed(__FILE__);
+}