TEST: Break out the local dynamic loading code from shlibloadtest.c

The result is "simpledynamic.c", or "sd" for short.

Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/13507)

1 files changed, 76 insertions, 0 deletions

diff --git a/test/simpledynamic.c b/test/simpledynamic.c
new file mode 100644
index 0000000000..41a910caa2
--- /dev/null
+++ b/test/simpledynamic.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdlib.h>              /* For NULL */
+#include <openssl/macros.h>      /* For NON_EMPTY_TRANSLATION_UNIT */
+#include "simpledynamic.h"
+
+#if defined(DSO_DLFCN)
+
+int sd_load(const char *filename, SD *lib, int type)
+{
+    int dl_flags = type;
+#ifdef _AIX
+    if (filename[strlen(filename) - 1] == ')')
+        dl_flags |= RTLD_MEMBER;
+#endif
+    *lib = dlopen(filename, dl_flags);
+    return *lib == NULL ? 0 : 1;
+}
+
+int sd_sym(SD lib, const char *symname, SD_SYM *sym)
+{
+    *sym = dlsym(lib, symname);
+    return *sym != NULL;
+}
+
+int sd_close(SD lib)
+{
+    return dlclose(lib) != 0 ? 0 : 1;
+}
+
+const char *sd_error(void)
+{
+    return dlerror();
+}
+
+#elif defined(DSO_WIN32)
+
+nt sd_load(const char *filename, SD *lib, ossl_unused int type)
+{
+    *lib = LoadLibraryA(filename);
+    return *lib == NULL ? 0 : 1;
+}
+
+int sd_sym(SD lib, const char *symname, SD_SYM *sym)
+{
+    *sym = (SD_SYM)GetProcAddress(lib, symname);
+    return *sym != NULL;
+}
+
+int sd_close(SD lib)
+{
+    return FreeLibrary(lib) == 0 ? 0 : 1;
+}
+
+const char *sd_error(void)
+{
+    static char buffer[255];
+
+    buffer[0] = '\0';
+    FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), 0,
+                   buffer, sizeof(buffer), NULL);
+    return buffer;
+}
+
+#else
+
+NON_EMPTY_TRANSLATION_UNIT
+
+#endif