-/* Copyright (C) 2001 Free Software Foundation, Inc.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public License
- * as published by the Free Software Foundation; either version 3 of
- * the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301 USA
- */
-
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include <stdlib.h>
-#include <string.h>
-#include "_scm.h"
-#include "vm-bootstrap.h"
-#include "frames.h"
-
-\f
-scm_t_bits scm_tc16_vm_frame;
-
-#define RELOC(frame, val) (val + SCM_VM_FRAME_OFFSET (frame))
-
-SCM
-scm_c_make_vm_frame (SCM stack_holder, SCM *fp, SCM *sp,
- scm_byte_t *ip, scm_t_ptrdiff offset)
-{
- struct scm_vm_frame *p = scm_gc_malloc (sizeof (struct scm_vm_frame),
- "vmframe");
- p->stack_holder = stack_holder;
- p->fp = fp;
- p->sp = sp;
- p->ip = ip;
- p->offset = offset;
- 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)
-{
- return SCM_VM_FRAME_STACK_HOLDER (obj);
-}
-
-static size_t
-vm_frame_free (SCM obj)
-{
- struct scm_vm_frame *p = SCM_VM_FRAME_DATA (obj);
- scm_gc_free (p, sizeof(struct scm_vm_frame), "vmframe");
- return 0;
-}
-
-/* Scheme interface */
-
-SCM_DEFINE (scm_vm_frame_p, "vm-frame?", 1, 0, 0,
- (SCM obj),
- "")
-#define FUNC_NAME s_scm_vm_frame_p
-{
- return SCM_BOOL (SCM_VM_FRAME_P (obj));
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_vm_frame_program, "vm-frame-program", 1, 0, 0,
- (SCM frame),
- "")
-#define FUNC_NAME s_scm_vm_frame_program
-{
- SCM_VALIDATE_VM_FRAME (1, frame);
- return SCM_FRAME_PROGRAM (SCM_VM_FRAME_FP (frame));
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_vm_frame_arguments, "vm-frame-arguments", 1, 0, 0,
- (SCM frame),
- "")
-#define FUNC_NAME s_scm_vm_frame_arguments
-{
- SCM *fp;
- int i;
- struct scm_objcode *bp;
- SCM ret;
-
- SCM_VALIDATE_VM_FRAME (1, frame);
-
- fp = SCM_VM_FRAME_FP (frame);
- bp = SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp));
-
- if (!bp->nargs)
- return SCM_EOL;
- else if (bp->nrest)
- ret = fp[bp->nargs - 1];
- else
- ret = scm_cons (fp[bp->nargs - 1], SCM_EOL);
-
- for (i = bp->nargs - 2; i >= 0; i--)
- ret = scm_cons (fp[i], ret);
-
- return ret;
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_vm_frame_source, "vm-frame-source", 1, 0, 0,
- (SCM frame),
- "")
-#define FUNC_NAME s_scm_vm_frame_source
-{
- SCM *fp;
- struct scm_objcode *bp;
-
- SCM_VALIDATE_VM_FRAME (1, frame);
-
- fp = SCM_VM_FRAME_FP (frame);
- bp = SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp));
-
- return scm_c_program_source (SCM_FRAME_PROGRAM (fp),
- SCM_VM_FRAME_IP (frame) - bp->base);
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_vm_frame_local_ref, "vm-frame-local-ref", 2, 0, 0,
- (SCM frame, SCM index),
- "")
-#define FUNC_NAME s_scm_vm_frame_local_ref
-{
- SCM *fp;
- unsigned int i;
- struct scm_objcode *bp;
-
- SCM_VALIDATE_VM_FRAME (1, frame);
-
- fp = SCM_VM_FRAME_FP (frame);
- bp = SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp));
-
- SCM_VALIDATE_UINT_COPY (2, index, i);
- SCM_ASSERT_RANGE (2, index, i < bp->nargs + bp->nlocs);
-
- return SCM_FRAME_VARIABLE (fp, i);
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_vm_frame_local_set_x, "vm-frame-local-set!", 3, 0, 0,
- (SCM frame, SCM index, SCM val),
- "")
-#define FUNC_NAME s_scm_vm_frame_local_set_x
-{
- SCM *fp;
- unsigned int i;
- struct scm_objcode *bp;
-
- SCM_VALIDATE_VM_FRAME (1, frame);
-
- fp = SCM_VM_FRAME_FP (frame);
- bp = SCM_PROGRAM_DATA (SCM_FRAME_PROGRAM (fp));
-
- SCM_VALIDATE_UINT_COPY (2, index, i);
- SCM_ASSERT_RANGE (2, index, i < bp->nargs + bp->nlocs);
-
- SCM_FRAME_VARIABLE (fp, i) = val;
-
- return SCM_UNSPECIFIED;
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_vm_frame_return_address, "vm-frame-return-address", 1, 0, 0,
- (SCM frame),
- "")
-#define FUNC_NAME s_scm_vm_frame_return_address
-{
- SCM_VALIDATE_VM_FRAME (1, frame);
- return scm_from_ulong ((unsigned long)
- (SCM_FRAME_RETURN_ADDRESS
- (SCM_VM_FRAME_FP (frame))));
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_vm_frame_mv_return_address, "vm-frame-mv-return-address", 1, 0, 0,
- (SCM frame),
- "")
-#define FUNC_NAME s_scm_vm_frame_mv_return_address
-{
- SCM_VALIDATE_VM_FRAME (1, frame);
- return scm_from_ulong ((unsigned long)
- (SCM_FRAME_MV_RETURN_ADDRESS
- (SCM_VM_FRAME_FP (frame))));
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_vm_frame_dynamic_link, "vm-frame-dynamic-link", 1, 0, 0,
- (SCM frame),
- "")
-#define FUNC_NAME s_scm_vm_frame_dynamic_link
-{
- SCM_VALIDATE_VM_FRAME (1, frame);
- /* fixme: munge fp if holder is a continuation */
- return scm_from_ulong
- ((unsigned long)
- RELOC (frame,
- SCM_FRAME_DYNAMIC_LINK (SCM_VM_FRAME_FP (frame))));
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_vm_frame_external_link, "vm-frame-external-link", 1, 0, 0,
- (SCM frame),
- "")
-#define FUNC_NAME s_scm_vm_frame_external_link
-{
- SCM_VALIDATE_VM_FRAME (1, frame);
- return SCM_FRAME_EXTERNAL_LINK (SCM_VM_FRAME_FP (frame));
-}
-#undef FUNC_NAME
-
-SCM_DEFINE (scm_vm_frame_stack, "vm-frame-stack", 1, 0, 0,
- (SCM frame),
- "")
-#define FUNC_NAME s_scm_vm_frame_stack
-{
- SCM *top, *bottom, ret = SCM_EOL;
-
- SCM_VALIDATE_VM_FRAME (1, frame);
-
- top = SCM_VM_FRAME_SP (frame);
- bottom = SCM_FRAME_UPPER_ADDRESS (SCM_VM_FRAME_FP (frame));
- while (bottom <= top)
- ret = scm_cons (*bottom++, ret);
-
- return ret;
-}
-#undef FUNC_NAME
-
-extern SCM
-scm_c_vm_frame_prev (SCM frame)
-{
- SCM *this_fp, *new_fp, *new_sp;
- this_fp = SCM_VM_FRAME_FP (frame);
- new_fp = SCM_FRAME_DYNAMIC_LINK (this_fp);
- if (new_fp)
- { new_fp = RELOC (frame, new_fp);
- new_sp = SCM_FRAME_LOWER_ADDRESS (this_fp) - 1;
- return scm_c_make_vm_frame (SCM_VM_FRAME_STACK_HOLDER (frame),
- new_fp, new_sp,
- SCM_FRAME_RETURN_ADDRESS (this_fp),
- SCM_VM_FRAME_OFFSET (frame));
- }
- else
- return SCM_BOOL_F;
-}
-
-\f
-void
-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);
- scm_c_register_extension ("libguile", "scm_init_frames",
- (scm_t_extension_init_func)scm_init_frames, NULL);
-}
-
-void
-scm_init_frames (void)
-{
- scm_bootstrap_vm ();
-
-#ifndef SCM_MAGIC_SNARFER
-#include "libguile/frames.x"
-#endif
-}
-
-/*
- Local Variables:
- c-file-style: "gnu"
- End:
-*/
+/* Copyright (C) 2001, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include "_scm.h"
+#include "frames.h"
+#include <verify.h>
+
+/* Make sure assumptions on the layout of `struct scm_vm_frame' hold. */
+verify (sizeof (SCM) == sizeof (SCM *));
+verify (sizeof (struct scm_vm_frame) == 5 * sizeof (SCM));
+verify (offsetof (struct scm_vm_frame, dynamic_link) == 0);
+
+\f
+#define RELOC(frame, val) \
+ (((SCM *) (val)) + SCM_VM_FRAME_OFFSET (frame))
+
+SCM
+scm_c_make_frame (SCM stack_holder, SCM *fp, SCM *sp,
+ scm_t_uint8 *ip, scm_t_ptrdiff offset)
+{
+ struct scm_frame *p = scm_gc_malloc (sizeof (struct scm_frame),
+ "vmframe");
+ p->stack_holder = stack_holder;
+ p->fp = fp;
+ p->sp = sp;
+ p->ip = ip;
+ p->offset = offset;
+ return scm_cell (scm_tc7_frame, (scm_t_bits)p);
+}
+
+void
+scm_i_frame_print (SCM frame, SCM port, scm_print_state *pstate)
+{
+ scm_puts_unlocked ("#<frame ", port);
+ scm_uintprint (SCM_UNPACK (frame), 16, port);
+ scm_putc_unlocked (' ', port);
+ scm_write (scm_frame_procedure (frame), port);
+ /* don't write args, they can get us into trouble. */
+ scm_puts_unlocked (">", port);
+}
+
+\f
+/* Scheme interface */
+
+SCM_DEFINE (scm_frame_p, "frame?", 1, 0, 0,
+ (SCM obj),
+ "")
+#define FUNC_NAME s_scm_frame_p
+{
+ return scm_from_bool (SCM_VM_FRAME_P (obj));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_frame_procedure, "frame-procedure", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_procedure
+{
+ SCM_VALIDATE_VM_FRAME (1, frame);
+ return SCM_FRAME_PROGRAM (SCM_VM_FRAME_FP (frame));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_frame_arguments, "frame-arguments", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_arguments
+{
+ static SCM var = SCM_BOOL_F;
+
+ SCM_VALIDATE_VM_FRAME (1, frame);
+
+ if (scm_is_false (var))
+ var = scm_c_module_lookup (scm_c_resolve_module ("system vm frame"),
+ "frame-arguments");
+
+ return scm_call_1 (SCM_VARIABLE_REF (var), frame);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_frame_source, "frame-source", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_source
+{
+ SCM_VALIDATE_VM_FRAME (1, frame);
+
+ return scm_program_source (scm_frame_procedure (frame),
+ scm_frame_instruction_pointer (frame),
+ SCM_UNDEFINED);
+}
+#undef FUNC_NAME
+
+/* The number of locals would be a simple thing to compute, if it weren't for
+ the presence of not-yet-active frames on the stack. So we have a cheap
+ heuristic to detect not-yet-active frames, and skip over them. Perhaps we
+ should represent them more usefully.
+*/
+SCM_DEFINE (scm_frame_num_locals, "frame-num-locals", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_num_locals
+{
+ SCM *sp, *p;
+ unsigned int n = 0;
+
+ SCM_VALIDATE_VM_FRAME (1, frame);
+
+ sp = SCM_VM_FRAME_SP (frame);
+ p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
+ while (p <= sp)
+ {
+ if (SCM_UNPACK (p[0]) == 0)
+ /* skip over not-yet-active frame */
+ p += 3;
+ else
+ {
+ p++;
+ n++;
+ }
+ }
+ return scm_from_uint (n);
+}
+#undef FUNC_NAME
+
+/* Need same not-yet-active frame logic here as in frame-num-locals */
+SCM_DEFINE (scm_frame_local_ref, "frame-local-ref", 2, 0, 0,
+ (SCM frame, SCM index),
+ "")
+#define FUNC_NAME s_scm_frame_local_ref
+{
+ SCM *sp, *p;
+ unsigned int n = 0;
+ unsigned int i;
+
+ SCM_VALIDATE_VM_FRAME (1, frame);
+ SCM_VALIDATE_UINT_COPY (2, index, i);
+
+ sp = SCM_VM_FRAME_SP (frame);
+ p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
+ while (p <= sp)
+ {
+ if (SCM_UNPACK (p[0]) == 0)
+ /* skip over not-yet-active frame */
+ p += 3;
+ else if (n == i)
+ return *p;
+ else
+ {
+ p++;
+ n++;
+ }
+ }
+ SCM_OUT_OF_RANGE (SCM_ARG2, index);
+}
+#undef FUNC_NAME
+
+/* Need same not-yet-active frame logic here as in frame-num-locals */
+SCM_DEFINE (scm_frame_local_set_x, "frame-local-set!", 3, 0, 0,
+ (SCM frame, SCM index, SCM val),
+ "")
+#define FUNC_NAME s_scm_frame_local_set_x
+{
+ SCM *sp, *p;
+ unsigned int n = 0;
+ unsigned int i;
+
+ SCM_VALIDATE_VM_FRAME (1, frame);
+ SCM_VALIDATE_UINT_COPY (2, index, i);
+
+ sp = SCM_VM_FRAME_SP (frame);
+ p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
+ while (p <= sp)
+ {
+ if (SCM_UNPACK (p[0]) == 0)
+ /* skip over not-yet-active frame */
+ p += 3;
+ else if (n == i)
+ {
+ *p = val;
+ return SCM_UNSPECIFIED;
+ }
+ else
+ {
+ p++;
+ n++;
+ }
+ }
+ SCM_OUT_OF_RANGE (SCM_ARG2, index);
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_frame_address, "frame-address", 1, 0, 0,
+ (SCM frame),
+ "Return the frame pointer for @var{frame}.")
+#define FUNC_NAME s_scm_frame_address
+{
+ SCM_VALIDATE_VM_FRAME (1, frame);
+ return scm_from_unsigned_integer ((scm_t_bits) SCM_VM_FRAME_FP (frame));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_frame_stack_pointer, "frame-stack-pointer", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_stack_pointer
+{
+ SCM_VALIDATE_VM_FRAME (1, frame);
+
+ return scm_from_unsigned_integer ((scm_t_bits) SCM_VM_FRAME_SP (frame));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_frame_instruction_pointer, "frame-instruction-pointer", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_instruction_pointer
+{
+ SCM program;
+ const struct scm_objcode *c_objcode;
+
+ SCM_VALIDATE_VM_FRAME (1, frame);
+ program = scm_frame_procedure (frame);
+
+ if (!SCM_PROGRAM_P (program))
+ return SCM_INUM0;
+
+ c_objcode = SCM_PROGRAM_DATA (program);
+ return scm_from_unsigned_integer ((SCM_VM_FRAME_IP (frame)
+ - SCM_C_OBJCODE_BASE (c_objcode)));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_frame_return_address, "frame-return-address", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_return_address
+{
+ SCM_VALIDATE_VM_FRAME (1, frame);
+ return scm_from_unsigned_integer ((scm_t_bits)
+ (SCM_FRAME_RETURN_ADDRESS
+ (SCM_VM_FRAME_FP (frame))));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_frame_mv_return_address, "frame-mv-return-address", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_mv_return_address
+{
+ SCM_VALIDATE_VM_FRAME (1, frame);
+ return scm_from_unsigned_integer ((scm_t_bits)
+ (SCM_FRAME_MV_RETURN_ADDRESS
+ (SCM_VM_FRAME_FP (frame))));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_frame_dynamic_link, "frame-dynamic-link", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_dynamic_link
+{
+ SCM_VALIDATE_VM_FRAME (1, frame);
+ /* fixme: munge fp if holder is a continuation */
+ return scm_from_ulong
+ ((unsigned long)
+ RELOC (frame,
+ SCM_FRAME_DYNAMIC_LINK (SCM_VM_FRAME_FP (frame))));
+}
+#undef FUNC_NAME
+
+SCM_DEFINE (scm_frame_previous, "frame-previous", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_previous
+{
+ SCM *this_fp, *new_fp, *new_sp;
+
+ SCM_VALIDATE_VM_FRAME (1, frame);
+
+ again:
+ this_fp = SCM_VM_FRAME_FP (frame);
+ new_fp = SCM_FRAME_DYNAMIC_LINK (this_fp);
+ if (new_fp)
+ { new_fp = RELOC (frame, new_fp);
+ new_sp = SCM_FRAME_LOWER_ADDRESS (this_fp) - 1;
+ frame = scm_c_make_frame (SCM_VM_FRAME_STACK_HOLDER (frame),
+ new_fp, new_sp,
+ SCM_FRAME_RETURN_ADDRESS (this_fp),
+ SCM_VM_FRAME_OFFSET (frame));
+ if (SCM_PROGRAM_IS_BOOT (scm_frame_procedure (frame)))
+ goto again;
+ else
+ return frame;
+ }
+ else
+ return SCM_BOOL_F;
+}
+#undef FUNC_NAME
+
+\f
+void
+scm_init_frames (void)
+{
+#ifndef SCM_MAGIC_SNARFER
+#include "libguile/frames.x"
+#endif
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff