vm: reset callframes before invoking unhandled exception handler

Reset all callframes when dealing with an unhandled exception to avoid
resuming the code which raised the exception when restarting the VM
later, e.g. through uc_vm_call() or uc_vm_invoke().

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

2 files changed, 3 insertions, 1 deletions

diff --git a/examples/exception-handler.c b/examples/exception-handler.c
index 1e722ec..a9a0299 100644
--- a/examples/exception-handler.c
+++ b/examples/exception-handler.c
@@ -30,7 +30,7 @@ static const char *program = MULTILINE_STRING(
 			doesnotexist();
 		}
 
-		fail();
+		map([1], x => fail(x));
 	%}
 );
 
diff --git a/vm.c b/vm.c
index 2c8f524..65d6c81 100644
--- a/vm.c
+++ b/vm.c
@@ -2278,6 +2278,8 @@ uc_vm_execute_chunk(uc_vm_t *vm)
 			while (!uc_vm_handle_exception(vm)) {
 				/* no further callframe to pop, report unhandled exception and terminate */
 				if (vm->callframes.count <= 1) {
+					uc_vm_reset_callframes(vm);
+
 					if (vm->exhandler)
 						vm->exhandler(vm, &vm->exception);