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fix the ping-pong between evaluator and vm stacks in make-stack

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* libguile/frames.c (vm_frame_print): Add a frame printer.

* libguile/stacks.c (stack_depth, read_frames): Only switch the VM stack
  for boot program dframes.

* libguile/vm-engine.c (VM_NAME): Push one debug frame per invocation,
  unconditionally. (If we push them at all, of course.)
This commit is contained in:
Andy Wingo 2009-02-05 18:13:27 +01:00
parent 3b9e095b44
commit 2f9769b60c
3 changed files with 35 additions and 22 deletions
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14
libguile/frames.c
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@ -66,6 +66,19 @@ scm_c_make_vm_frame (SCM stack_holder, SCM *fp, SCM *sp,
SCM_RETURN_NEWSMOB (scm_tc16_vm_frame, p);
}
static int
vm_frame_print (SCM frame, SCM port, scm_print_state *pstate)
{
scm_puts ("#<vm-frame ", port);
scm_uintprint (SCM_UNPACK (frame), 16, port);
scm_putc (' ', port);
scm_write (scm_vm_frame_program (frame), port);
/* don't write args, they can get us into trouble. */
scm_puts (">", port);
return 1;
}
static SCM
vm_frame_mark (SCM obj)
{
@ -283,6 +296,7 @@ scm_bootstrap_frames (void)
scm_tc16_vm_frame = scm_make_smob_type ("vm-frame", 0);
scm_set_smob_mark (scm_tc16_vm_frame, vm_frame_mark);
scm_set_smob_free (scm_tc16_vm_frame, vm_frame_free);
scm_set_smob_print (scm_tc16_vm_frame, vm_frame_print);
}
void