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authorLudovic Courtès <ludo@gnu.org>2009-03-22 15:28:35 +0100
committerLudovic Courtès <ludo@gnu.org>2009-03-22 15:28:35 +0100
commitd9e59f894e1b41958203ddda7f21f4817cfcfe37 (patch)
treef0d6b0b38ed000aabf327dba4e281c37c60f92a5 /libguile/frames.c
parentf307fbcec2cbaaa95b8c861395133b519c7519cf (diff)
parent80540f391498ebb0f955db2fafb6a36ed03b7886 (diff)
downloadguile-d9e59f894e1b41958203ddda7f21f4817cfcfe37.tar.gz
Merge branch 'master' into boehm-demers-weiser-gc
Conflicts: libguile/continuations.c libguile/gc-freelist.c libguile/gc-mark.c libguile/symbols.c libguile/threads.c module/ice-9/boot-9.scm
Diffstat (limited to 'libguile/frames.c')
-rw-r--r--libguile/frames.c316
1 files changed, 316 insertions, 0 deletions
diff --git a/libguile/frames.c b/libguile/frames.c
new file mode 100644
index 000000000..647cb608d
--- /dev/null
+++ b/libguile/frames.c
@@ -0,0 +1,316 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307 USA
+ *
+ * As a special exception, the Free Software Foundation gives permission
+ * for additional uses of the text contained in its release of GUILE.
+ *
+ * The exception is that, if you link the GUILE library with other files
+ * to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the GUILE library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the
+ * Free Software Foundation under the name GUILE. If you copy
+ * code from other Free Software Foundation releases into a copy of
+ * GUILE, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way. To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for GUILE, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice. */
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <string.h>
+#include "vm-bootstrap.h"
+#include "frames.h"
+
+
+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 scm_sizet
+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;
+}
+
+
+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);
+}
+
+void
+scm_init_frames (void)
+{
+ scm_bootstrap_vm ();
+
+#ifndef SCM_MAGIC_SNARFER
+#include "libguile/frames.x"
+#endif
+}
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/