[eglib] Handle dli.dli_sname being NULL in g_module_address (). (mono/mono#17592)

Should fix the warnings/assertions in g_strlcpy ().

Commit migrated from https://github.com/mono/mono/commit/b0d966bd7ab887f075f6ce3d1c9858af6b52f30f

diff --git a/src/mono/mono/eglib/gmodule-unix.c b/src/mono/mono/eglib/gmodule-unix.c
index 1e1d15f..3f60af2 100644 (file)
--- a/src/mono/mono/eglib/gmodule-unix.c
+++ b/src/mono/mono/eglib/gmodule-unix.c
@@ -98,8 +98,12 @@ g_module_address (void *addr, char *file_name, size_t file_name_len,
                g_strlcpy(file_name, dli.dli_fname, file_name_len);
        if (file_base != NULL)
                *file_base = dli.dli_fbase;
-       if (sym_name != NULL && sym_name_len >= 1)
-               g_strlcpy(sym_name, dli.dli_sname, sym_name_len);
+       if (sym_name != NULL && sym_name_len >= 1) {
+               if (dli.dli_sname)
+                       g_strlcpy (sym_name, dli.dli_sname, sym_name_len);
+               else
+                       sym_name [0] = '\0';
+       }
        if (sym_addr != NULL)
                *sym_addr = dli.dli_saddr;
        return TRUE;