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authorLudovic Courtès <ludo@gnu.org>2009-09-02 00:07:27 +0200
committerLudovic Courtès <ludo@gnu.org>2009-09-02 01:37:37 +0200
commit5f236208d0d864546e59afa0f5a11c9b3ba14b10 (patch)
treeeed5d9203a2633c8efb85c1b36425eab87574299 /libguile/frames.c
parentf0eb5ae6c173aed35965b0561897fda1d8ff0db1 (diff)
parentd7e7a02a6251c8ed4f76933d9d30baeee3f599c0 (diff)
downloadguile-5f236208d0d864546e59afa0f5a11c9b3ba14b10.tar.gz
Merge branch 'boehm-demers-weiser-gc' into bdw-gc-static-alloc
Conflicts: acinclude.m4 libguile/strings.c
Diffstat (limited to 'libguile/frames.c')
-rw-r--r--libguile/frames.c272
1 files changed, 272 insertions, 0 deletions
diff --git a/libguile/frames.c b/libguile/frames.c
new file mode 100644
index 000000000..a6835fbb4
--- /dev/null
+++ b/libguile/frames.c
@@ -0,0 +1,272 @@
+/* Copyright (C) 2001, 2009 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"
+
+
+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_t_uint8 *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;
+}
+
+
+/* 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 = SCM_FRAME_VARIABLE (fp, bp->nargs - 1);
+ else
+ ret = scm_cons (SCM_FRAME_VARIABLE (fp, bp->nargs - 1), SCM_EOL);
+
+ for (i = bp->nargs - 2; i >= 0; i--)
+ ret = scm_cons (SCM_FRAME_VARIABLE (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_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_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:
+*/