[mono][debugger]Reverting major version change (#47872)

src/mono/mono/mini/debugger-agent.c

@@ -3647,7 +3647,7 @@ static void
 runtime_initialized (MonoProfiler *prof)
 {
 	process_profiler_event (EVENT_KIND_VM_START, mono_thread_current ());
-	if (CHECK_PROTOCOL_VERSION (3, 0))
+	if (CHECK_PROTOCOL_VERSION (2, 59))
 		process_profiler_event (EVENT_KIND_ASSEMBLY_LOAD, (mono_defaults.corlib->assembly));
 	if (agent_config.defer) {
 		ERROR_DECL (error);
@@ -5029,7 +5029,7 @@ buffer_add_value_full (Buffer *buf, MonoType *t, void *addr, MonoDomain *domain,
 
 		if (!obj) {
 			buffer_add_byte (buf, VALUE_TYPE_ID_NULL);
-			if (CHECK_PROTOCOL_VERSION (3, 0)) {
+			if (CHECK_PROTOCOL_VERSION (2, 59)) {
 				buffer_add_info_for_null_value(buf, t, domain);
 			}
 		} else {
@@ -5924,7 +5924,7 @@ do_invoke_method (DebuggerTlsData *tls, Buffer *buf, InvokeData *invoke, guint8
 		return ERR_INVALID_ARGUMENT;
 	} else if (m_class_is_valuetype (m->klass) && (m->flags & METHOD_ATTRIBUTE_STATIC)) {
 		/* Should be null */
-		if (!CHECK_PROTOCOL_VERSION (3, 0)) { //on icordbg I couldn't find type information when invoking a static method maybe I can change this later
+		if (!CHECK_PROTOCOL_VERSION (2, 59)) { //on icordbg I couldn't find type information when invoking a static method maybe I can change this later
 			int type = decode_byte (p, &p, end);
 			if (type != VALUE_TYPE_ID_NULL) {
 				PRINT_DEBUG_MSG (1, "[%p] Error: Static vtype method invoked with this argument.\n", (gpointer) (gsize) mono_native_thread_id_get ());
@@ -5946,14 +5946,14 @@ do_invoke_method (DebuggerTlsData *tls, Buffer *buf, InvokeData *invoke, guint8
 					return err;
 			}
 	} else {
-		if (!(m->flags & METHOD_ATTRIBUTE_STATIC && CHECK_PROTOCOL_VERSION (3, 0))) { //on icordbg I couldn't find an object when invoking a static method maybe I can change this later
+		if (!(m->flags & METHOD_ATTRIBUTE_STATIC && CHECK_PROTOCOL_VERSION (2, 59))) { //on icordbg I couldn't find an object when invoking a static method maybe I can change this later
 			err = decode_value(m_class_get_byval_arg(m->klass), domain, this_buf, p, &p, end, FALSE);
 			if (err != ERR_NONE)
 				return err;
 		}
 	}
 
-	if (!m_class_is_valuetype (m->klass) && !(m->flags & METHOD_ATTRIBUTE_STATIC && CHECK_PROTOCOL_VERSION (3, 0))) //on icordbg I couldn't find an object when invoking a static method maybe I can change this later
+	if (!m_class_is_valuetype (m->klass) && !(m->flags & METHOD_ATTRIBUTE_STATIC && CHECK_PROTOCOL_VERSION (2, 59))) //on icordbg I couldn't find an object when invoking a static method maybe I can change this later
 		this_arg = *(MonoObject**)this_buf;
 	else
 		this_arg = NULL;
@@ -6733,7 +6733,7 @@ vm_commands (int command, int id, guint8 *p, guint8 *end, Buffer *buf)
 		tls->pending_invoke->endp = tls->pending_invoke->p + (end - p);
 		tls->pending_invoke->suspend_count = suspend_count;
 		tls->pending_invoke->nmethods = nmethods;
-		if (!CHECK_PROTOCOL_VERSION (3, 0)) { //on icordbg they send a resume after calling an invoke method
+		if (!CHECK_PROTOCOL_VERSION (2, 59)) { //on icordbg they send a resume after calling an invoke method
 			if (flags & INVOKE_FLAG_SINGLE_THREADED) {
 				resume_thread(THREAD_TO_INTERNAL(thread));
 			}
@@ -7540,7 +7540,7 @@ field_commands (int command, guint8 *p, guint8 *end, Buffer *buf)
 		buffer_add_typeid (buf, domain, f->parent);
 		buffer_add_typeid (buf, domain, mono_class_from_mono_type_internal (f->type));
 		buffer_add_int (buf, f->type->attrs);
-		if (CHECK_PROTOCOL_VERSION (3, 0)) {
+		if (CHECK_PROTOCOL_VERSION (2, 59)) {
 			buffer_add_int (buf, f->type->type);
 			buffer_add_int (buf, m_class_get_type_token (f->parent));
 			buffer_add_int (buf, m_class_get_type_token (mono_class_from_mono_type_internal (f->type)));
@@ -7684,7 +7684,7 @@ type_commands_internal (int command, MonoClass *klass, MonoDomain *domain, guint
 
 		while ((m = mono_class_get_methods (klass, &iter))) {
 			buffer_add_methodid (buf, domain, m);
-			if (CHECK_PROTOCOL_VERSION (3, 0))
+			if (CHECK_PROTOCOL_VERSION (2, 59))
 				buffer_add_int(buf, m->token);
 			i ++;
 		}

src/mono/mono/mini/debugger-protocol.h

@@ -10,8 +10,8 @@
  * Wire Protocol definitions
  */
 
-#define MAJOR_VERSION 3
-#define MINOR_VERSION 0
+#define MAJOR_VERSION 2
+#define MINOR_VERSION 59
 
 typedef enum {
 	MDBGPROT_CMD_COMPOSITE = 100