mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-30 03:40:34 +02:00
3dbbe28dfd
* libguile/frames.c, libguile/objcodes.c, libguile/programs.c, libguile/vm-engine.c, libguile/vm-i-system.c, libguile/vm.c: Use `SCM_C_OBJCODE_BASE ()' instead of accessing the `base' field of `struct scm_objcode'. * libguile/objcodes.h (struct scm_objcode)[base]: Remove.
325 lines
7.9 KiB
C
325 lines
7.9 KiB
C
/* Copyright (C) 2001, 2009 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 "vm-bootstrap.h"
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#include "frames.h"
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scm_t_bits scm_tc16_frame;
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#define RELOC(frame, val) (val + SCM_VM_FRAME_OFFSET (frame))
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SCM
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scm_c_make_frame (SCM stack_holder, SCM *fp, SCM *sp,
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scm_t_uint8 *ip, scm_t_ptrdiff offset)
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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 = fp;
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p->sp = sp;
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p->ip = ip;
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p->offset = offset;
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SCM_RETURN_NEWSMOB (scm_tc16_frame, p);
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}
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static int
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frame_print (SCM frame, SCM port, scm_print_state *pstate)
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{
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scm_puts ("#<frame ", port);
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scm_uintprint (SCM_UNPACK (frame), 16, port);
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scm_putc (' ', 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 (">", port);
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return 1;
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}
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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 *fp;
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struct scm_objcode *bp;
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SCM_VALIDATE_VM_FRAME (1, frame);
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fp = SCM_VM_FRAME_FP (frame);
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bp = SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp));
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return scm_c_program_source (SCM_FRAME_PROGRAM (fp),
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SCM_VM_FRAME_IP (frame)
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- SCM_C_OBJCODE_BASE (bp));
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}
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#undef FUNC_NAME
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/* The number of locals would be a simple thing to compute, if it weren't for
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the presence of not-yet-active frames on the stack. So we have a cheap
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heuristic to detect not-yet-active frames, and skip over them. Perhaps we
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should represent them more usefully.
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*/
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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 *sp, *p;
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unsigned int n = 0;
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SCM_VALIDATE_VM_FRAME (1, frame);
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sp = SCM_VM_FRAME_SP (frame);
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p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
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while (p <= sp)
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{
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if (p + 1 < sp && p[1] == (SCM)0)
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/* skip over not-yet-active frame */
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p += 3;
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else
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{
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p++;
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n++;
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}
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}
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return scm_from_uint (n);
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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_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 *sp, *p;
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unsigned int n = 0;
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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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sp = SCM_VM_FRAME_SP (frame);
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p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
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while (p <= sp)
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{
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if (p + 1 < sp && p[1] == (SCM)0)
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/* skip over not-yet-active frame */
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p += 3;
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else if (n == i)
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return *p;
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else
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{
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p++;
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n++;
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}
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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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/* 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 *sp, *p;
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unsigned int n = 0;
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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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sp = SCM_VM_FRAME_SP (frame);
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p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
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while (p <= sp)
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{
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if (p + 1 < sp && p[1] == (SCM)0)
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/* skip over not-yet-active frame */
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p += 3;
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else if (n == i)
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{
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*p = val;
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return SCM_UNSPECIFIED;
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}
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else
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{
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p++;
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n++;
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}
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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_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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const struct scm_objcode *c_objcode;
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SCM_VALIDATE_VM_FRAME (1, frame);
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c_objcode = SCM_PROGRAM_DATA (scm_frame_procedure (frame));
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return scm_from_ulong ((unsigned long)
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(SCM_VM_FRAME_IP (frame)
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- SCM_C_OBJCODE_BASE (c_objcode)));
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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_ulong ((unsigned long)
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(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_mv_return_address, "frame-mv-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_mv_return_address
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{
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SCM_VALIDATE_VM_FRAME (1, frame);
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return scm_from_ulong ((unsigned long)
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(SCM_FRAME_MV_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_ulong
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((unsigned long)
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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_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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{ new_fp = RELOC (frame, new_fp);
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new_sp = SCM_FRAME_LOWER_ADDRESS (this_fp) - 1;
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frame = scm_c_make_frame (SCM_VM_FRAME_STACK_HOLDER (frame),
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new_fp, new_sp,
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SCM_FRAME_RETURN_ADDRESS (this_fp),
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SCM_VM_FRAME_OFFSET (frame));
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if (SCM_PROGRAM_IS_BOOT (scm_frame_procedure (frame)))
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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_bootstrap_frames (void)
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{
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scm_tc16_frame = scm_make_smob_type ("frame", 0);
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scm_set_smob_print (scm_tc16_frame, frame_print);
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scm_c_register_extension ("libguile", "scm_init_frames",
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(scm_t_extension_init_func)scm_init_frames, NULL);
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}
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void
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scm_init_frames (void)
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{
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scm_bootstrap_vm ();
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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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