Adjusting the stack for after it enters the virtual machine
ref.
I mentioned in that there was no reentrant to the virtual machine, but in fact it was still a possibility at that point.
Also, the variable `ci` needs to be recalculated at the same time.
MODIFY
src/class.c
src/class.c
@@ -930,6 +930,13 @@ mrb_block_given_p(mrb_state *mrb)
MRB_API mrb_int
mrb_get_args(mrb_state *mrb, const char *format, ...)
{
+#define ADJUST_STACK() do { \
+ if (argv_on_stack) { \
+ ci = mrb->c->ci; \
+ argv = mrb->c->ci->stack + 1; \
+ } \
+} while (0)
+
const char *fmt = format;
char c;
int i = 0;
@@ -1192,6 +1199,7 @@ mrb_get_args(mrb_state *mrb, const char *format, ...)
p = va_arg(ap, mrb_float*);
if (pickarg) {
*p = mrb_as_float(mrb, *pickarg);
+ ADJUST_STACK();
}
}
break;
@@ -1203,6 +1211,7 @@ mrb_get_args(mrb_state *mrb, const char *format, ...)
p = va_arg(ap, mrb_int*);
if (pickarg) {
*p = mrb_as_int(mrb, *pickarg);
+ ADJUST_STACK();
}
}
break;
@@ -1365,6 +1374,8 @@ mrb_get_args(mrb_state *mrb, const char *format, ...)
finish:
va_end(ap);
return i;
+
+#undef ADJUST_STACK
}
static struct RClass*

Adjusting the stack for after it enters the virtual machine

ref. #5613.

I mentioned in #5540 that there was no reentrant to the virtual machine, but in fact it was still a possibility at that point.
Also, the variable `ci` needs to be recalculated at the same time.