From: Felix Fietkau <nbd@nbd.name>
Date: Wed, 11 Jun 2025 17:35:00 +0200
Subject: [PATCH] vm: export function for converting exception to ucode
 value

This can be used to simplify implementing module execption handlers in
ucode.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

--- a/include/ucode/vm.h
+++ b/include/ucode/vm.h
@@ -152,6 +152,7 @@ uc_exception_type_t uc_vm_call(uc_vm_t *
 
 void __attribute__((format(printf, 3, 0)))
 uc_vm_raise_exception(uc_vm_t *vm, uc_exception_type_t type, const char *fmt, ...);
+uc_value_t *uc_vm_exception_value(uc_vm_t *vm);
 
 uc_vm_status_t uc_vm_execute(uc_vm_t *vm, uc_program_t *fn, uc_value_t **retval);
 uc_value_t *uc_vm_invoke(uc_vm_t *vm, const char *fname, size_t nargs, ...);
--- a/vm.c
+++ b/vm.c
@@ -814,9 +814,12 @@ uc_vm_exception_tostring(uc_vm_t *vm, si
 	return message ? ucv_get(message) : ucv_string_new("Exception");
 }
 
-static uc_value_t *
-uc_vm_exception_new(uc_vm_t *vm, uc_exception_type_t type, const char *message, uc_value_t *stacktrace)
+uc_value_t *
+uc_vm_exception_value(uc_vm_t *vm)
 {
+	uc_exception_type_t type = vm->exception.type;
+	const char *message = vm->exception.message;
+	uc_value_t *stacktrace = vm->exception.stacktrace;
 	uc_value_t *exception_prototype = uc_vm_registry_get(vm, "vm.exception.proto");
 	uc_value_t *exo;
 
@@ -881,7 +884,7 @@ uc_vm_handle_exception(uc_vm_t *vm)
 			ucv_put(uc_vm_stack_pop(vm));
 
 		/* prepare exception object and expose it to user handler code */
-		exo = uc_vm_exception_new(vm, vm->exception.type, vm->exception.message, vm->exception.stacktrace);
+		exo = uc_vm_exception_value(vm);
 
 		uc_vm_stack_push(vm, exo);