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5515edc5f2
* libguile/frames.h (struct scm_frame): stack_holder is a void*. * libguile/frames.c (scm_i_frame_stack_base, scm_i_frame_offset): Expect stack_holder to be the raw struct scm_vm or scm_vm_cont. * libguile/continuations.c (scm_i_continuation_to_frame): * libguile/stacks.c (scm_make_stack) * libguile/vm.c (vm_dispatch_hook): Adapt creators.
328 lines
8 KiB
C
328 lines
8 KiB
C
/* Copyright (C) 2001, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#if HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include "_scm.h"
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#include "frames.h"
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#include "vm.h"
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#include <verify.h>
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/* Make sure assumptions on the layout of `struct scm_vm_frame' hold. */
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verify (sizeof (SCM) == sizeof (SCM *));
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verify (sizeof (struct scm_vm_frame) == 3 * sizeof (SCM));
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verify (offsetof (struct scm_vm_frame, dynamic_link) == 0);
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#define RELOC(frame, val) \
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(((SCM *) (val)) + SCM_VM_FRAME_OFFSET (frame))
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SCM
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scm_c_make_frame (enum scm_vm_frame_kind frame_kind, void *stack_holder,
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scm_t_ptrdiff fp_offset, scm_t_ptrdiff sp_offset,
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scm_t_uint32 *ip)
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{
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struct scm_frame *p = scm_gc_malloc (sizeof (struct scm_frame),
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"vmframe");
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p->stack_holder = stack_holder;
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p->fp_offset = fp_offset;
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p->sp_offset = sp_offset;
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p->ip = ip;
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return scm_cell (scm_tc7_frame | (frame_kind << 8), (scm_t_bits)p);
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}
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void
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scm_i_frame_print (SCM frame, SCM port, scm_print_state *pstate)
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{
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scm_puts_unlocked ("#<frame ", port);
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scm_uintprint (SCM_UNPACK (frame), 16, port);
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scm_putc_unlocked (' ', port);
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scm_write (scm_frame_procedure (frame), port);
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/* don't write args, they can get us into trouble. */
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scm_puts_unlocked (">", port);
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}
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SCM*
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scm_i_frame_stack_base (SCM frame)
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#define FUNC_NAME "frame-stack-base"
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{
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void *stack_holder;
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SCM_VALIDATE_VM_FRAME (1, frame);
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stack_holder = SCM_VM_FRAME_STACK_HOLDER (frame);
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switch (SCM_VM_FRAME_KIND (frame))
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{
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case SCM_VM_FRAME_KIND_CONT:
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return ((struct scm_vm_cont *) stack_holder)->stack_base;
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case SCM_VM_FRAME_KIND_VM:
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return ((struct scm_vm *) stack_holder)->stack_base;
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default:
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abort ();
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}
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}
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#undef FUNC_NAME
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scm_t_ptrdiff
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scm_i_frame_offset (SCM frame)
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#define FUNC_NAME "frame-offset"
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{
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void *stack_holder;
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SCM_VALIDATE_VM_FRAME (1, frame);
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stack_holder = SCM_VM_FRAME_STACK_HOLDER (frame);
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switch (SCM_VM_FRAME_KIND (frame))
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{
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case SCM_VM_FRAME_KIND_CONT:
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return ((struct scm_vm_cont *) stack_holder)->reloc;
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case SCM_VM_FRAME_KIND_VM:
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return 0;
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default:
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abort ();
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}
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}
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#undef FUNC_NAME
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/* Scheme interface */
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SCM_DEFINE (scm_frame_p, "frame?", 1, 0, 0,
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(SCM obj),
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"")
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#define FUNC_NAME s_scm_frame_p
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{
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return scm_from_bool (SCM_VM_FRAME_P (obj));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_frame_procedure, "frame-procedure", 1, 0, 0,
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(SCM frame),
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"")
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#define FUNC_NAME s_scm_frame_procedure
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{
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SCM_VALIDATE_VM_FRAME (1, frame);
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return SCM_FRAME_PROGRAM (SCM_VM_FRAME_FP (frame));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_frame_arguments, "frame-arguments", 1, 0, 0,
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(SCM frame),
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"")
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#define FUNC_NAME s_scm_frame_arguments
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{
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static SCM var = SCM_BOOL_F;
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SCM_VALIDATE_VM_FRAME (1, frame);
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if (scm_is_false (var))
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var = scm_c_module_lookup (scm_c_resolve_module ("system vm frame"),
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"frame-arguments");
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return scm_call_1 (SCM_VARIABLE_REF (var), frame);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_frame_source, "frame-source", 1, 0, 0,
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(SCM frame),
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"")
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#define FUNC_NAME s_scm_frame_source
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{
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SCM_VALIDATE_VM_FRAME (1, frame);
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return scm_find_source_for_addr (scm_frame_instruction_pointer (frame));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_frame_num_locals, "frame-num-locals", 1, 0, 0,
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(SCM frame),
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"")
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#define FUNC_NAME s_scm_frame_num_locals
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{
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SCM *fp, *sp;
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SCM_VALIDATE_VM_FRAME (1, frame);
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fp = SCM_VM_FRAME_FP (frame);
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sp = SCM_VM_FRAME_SP (frame);
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return scm_from_ptrdiff_t (SCM_FRAME_NUM_LOCALS (fp, sp));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_frame_local_ref, "frame-local-ref", 2, 0, 0,
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(SCM frame, SCM index),
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"")
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#define FUNC_NAME s_scm_frame_local_ref
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{
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SCM *fp, *sp;
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unsigned int i;
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SCM_VALIDATE_VM_FRAME (1, frame);
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SCM_VALIDATE_UINT_COPY (2, index, i);
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fp = SCM_VM_FRAME_FP (frame);
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sp = SCM_VM_FRAME_SP (frame);
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if (i < SCM_FRAME_NUM_LOCALS (fp, sp))
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return SCM_FRAME_LOCAL (fp, i);
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SCM_OUT_OF_RANGE (SCM_ARG2, index);
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}
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#undef FUNC_NAME
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/* Need same not-yet-active frame logic here as in frame-num-locals */
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SCM_DEFINE (scm_frame_local_set_x, "frame-local-set!", 3, 0, 0,
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(SCM frame, SCM index, SCM val),
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"")
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#define FUNC_NAME s_scm_frame_local_set_x
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{
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SCM *fp, *sp;
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unsigned int i;
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SCM_VALIDATE_VM_FRAME (1, frame);
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SCM_VALIDATE_UINT_COPY (2, index, i);
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fp = SCM_VM_FRAME_FP (frame);
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sp = SCM_VM_FRAME_SP (frame);
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if (i < SCM_FRAME_NUM_LOCALS (fp, sp))
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{
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SCM_FRAME_LOCAL (fp, i) = val;
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return SCM_UNSPECIFIED;
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}
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SCM_OUT_OF_RANGE (SCM_ARG2, index);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_frame_address, "frame-address", 1, 0, 0,
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(SCM frame),
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"Return the frame pointer for @var{frame}.")
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#define FUNC_NAME s_scm_frame_address
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{
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SCM_VALIDATE_VM_FRAME (1, frame);
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return scm_from_uintptr_t ((scm_t_uintptr) SCM_VM_FRAME_FP (frame));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_frame_stack_pointer, "frame-stack-pointer", 1, 0, 0,
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(SCM frame),
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"")
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#define FUNC_NAME s_scm_frame_stack_pointer
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{
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SCM_VALIDATE_VM_FRAME (1, frame);
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return scm_from_uintptr_t ((scm_t_uintptr) SCM_VM_FRAME_SP (frame));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_frame_instruction_pointer, "frame-instruction-pointer", 1, 0, 0,
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(SCM frame),
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"")
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#define FUNC_NAME s_scm_frame_instruction_pointer
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{
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SCM_VALIDATE_VM_FRAME (1, frame);
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return scm_from_uintptr_t ((scm_t_uintptr) SCM_VM_FRAME_IP (frame));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_frame_return_address, "frame-return-address", 1, 0, 0,
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(SCM frame),
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"")
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#define FUNC_NAME s_scm_frame_return_address
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{
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SCM_VALIDATE_VM_FRAME (1, frame);
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return scm_from_uintptr_t ((scm_t_uintptr) (SCM_FRAME_RETURN_ADDRESS
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(SCM_VM_FRAME_FP (frame))));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_frame_dynamic_link, "frame-dynamic-link", 1, 0, 0,
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(SCM frame),
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"")
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#define FUNC_NAME s_scm_frame_dynamic_link
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{
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SCM_VALIDATE_VM_FRAME (1, frame);
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/* fixme: munge fp if holder is a continuation */
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return scm_from_uintptr_t
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((scm_t_uintptr)
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RELOC (frame,
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SCM_FRAME_DYNAMIC_LINK (SCM_VM_FRAME_FP (frame))));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_frame_previous, "frame-previous", 1, 0, 0,
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(SCM frame),
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"")
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#define FUNC_NAME s_scm_frame_previous
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{
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SCM *this_fp, *new_fp, *new_sp;
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SCM proc;
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SCM_VALIDATE_VM_FRAME (1, frame);
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again:
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this_fp = SCM_VM_FRAME_FP (frame);
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new_fp = SCM_FRAME_DYNAMIC_LINK (this_fp);
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if (new_fp)
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{
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SCM *stack_base = scm_i_frame_stack_base (frame);
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new_fp = RELOC (frame, new_fp);
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new_sp = SCM_FRAME_PREVIOUS_SP (this_fp);
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frame = scm_c_make_frame (SCM_VM_FRAME_KIND (frame),
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SCM_VM_FRAME_STACK_HOLDER (frame),
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new_fp - stack_base, new_sp - stack_base,
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SCM_FRAME_RETURN_ADDRESS (this_fp));
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proc = scm_frame_procedure (frame);
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if (SCM_PROGRAM_P (proc) && SCM_PROGRAM_IS_BOOT (proc))
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goto again;
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else
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return frame;
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}
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else
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return SCM_BOOL_F;
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}
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#undef FUNC_NAME
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void
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scm_init_frames (void)
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{
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#ifndef SCM_MAGIC_SNARFER
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#include "libguile/frames.x"
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#endif
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}
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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