"")
#define FUNC_NAME s_scm_frame_num_locals
{
- SCM *sp, *p;
+ SCM *fp, *sp, *p;
unsigned int n = 0;
SCM_VALIDATE_VM_FRAME (1, frame);
+ fp = SCM_VM_FRAME_FP (frame);
+ sp = SCM_VM_FRAME_SP (frame);
+ p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
+
+ if (SCM_RTL_PROGRAM_P (fp[-1]))
+ /* The frame size of an RTL program is fixed, except in the case of
+ passing a wrong number of arguments to the program. So we do
+ need to use an SP for determining the number of locals. */
+ return scm_from_uint32 (sp + 1 - p);
+
sp = SCM_VM_FRAME_SP (frame);
p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
while (p <= sp)