Add a --aot-lazy-assembly-load command line option to load assemblies… (

dotnet#67024)

* Add a --aot-lazy-assembly-load command line option to load assemblies referenced by AOT images lazily.

Note that this requires the assemblies used at AOT time to exactly match
the assemblies loaded at runtime, otherwise the runtime will abort
when it loads the mismatching reference.

* Handle the options added by options.h in mono_jit_parse_options ().

src/mono/mono/mini/aot-runtime.c

@@ -62,6 +62,7 @@
 #include <mono/utils/mono-threads-coop.h>
 #include <mono/utils/bsearch.h>
 #include <mono/utils/mono-tls-inline.h>
+#include <mono/utils/options.h>
 
 #include "mini.h"
 #include "seq-points.h"
@@ -1895,7 +1896,6 @@ load_aot_module (MonoAssemblyLoadContext *alc, MonoAssembly *assembly, gpointer
 	gpointer *globals = NULL;
 	MonoAotFileInfo *info = NULL;
 	int i, version;
-	gboolean do_load_image = TRUE;
 	int align_double, align_int64;
 	guint8 *aot_data = NULL;
 
@@ -2289,7 +2289,7 @@ load_aot_module (MonoAssemblyLoadContext *alc, MonoAssembly *assembly, gpointer
 	 * non-lazily, since we can't handle out-of-date errors later.
 	 * The cached class info also depends on the exact assemblies.
 	 */
-	if (do_load_image) {
+	if (!mono_opt_aot_lazy_assembly_load) {
 		for (i = 0; i < amodule->image_table_len; ++i) {
 			ERROR_DECL (error);
 			load_image (amodule, i, error);

src/mono/mono/mini/driver.c

@@ -1787,11 +1787,23 @@ parse_qualified_method_name (char *method_name)
 void
 mono_jit_parse_options (int argc, char * argv[])
 {
+	ERROR_DECL (error);
 	int i;
 	char *trace_options = NULL;
 	int mini_verbose_level = 0;
 	guint32 opt;
 
+	/* Make a copy since mono_options_parse_options () modifies argv */
+	char **copy_argv = g_new0 (char*, argc);
+	memcpy (copy_argv, argv, sizeof (char*) * argc);
+	argv = copy_argv;
+
+	mono_options_parse_options ((const char**)argv, argc, &argc, error);
+	if (!is_ok (error)) {
+		g_printerr ("%s", mono_error_get_message (error));
+		mono_error_cleanup (error);
+	}
+
 	/* 
 	 * Some options have no effect here, since they influence the behavior of 
 	 * mono_main ().
@@ -1880,6 +1892,9 @@ mono_jit_parse_options (int argc, char * argv[])
 
 	if (mini_verbose_level)
 		mono_set_verbose_level (mini_verbose_level);
+
+	/* Free the copy */
+	g_free (argv);
 }
 
 static void

src/mono/mono/utils/options-def.h

@@ -60,6 +60,7 @@ DEFINE_BOOL_READONLY(readonly_flag, "readonly-flag", FALSE, "Example")
 #endif
 */
 
+DEFINE_BOOL(aot_lazy_assembly_load, "aot-lazy-assembly-load", FALSE, "Load assemblies referenced by AOT images lazily")
 /* Cleanup */
 #undef DEFINE_OPTION_FULL
 #undef DEFINE_OPTION_READONLY

src/mono/mono/utils/options.c

@@ -86,7 +86,7 @@ mono_options_print_usage (void)
 }
 
 /*
- * mono_optiond_parse_options:
+ * mono_options_parse_options:
  *
  *   Set options based on the command line arguments in ARGV/ARGC.
  * Remove processed arguments from ARGV and set *OUT_ARGC to the