-/* Copyright (C) 2001, 2009, 2010 Free Software Foundation, Inc.
+/* 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
#include <string.h>
#include "_scm.h"
#include "frames.h"
+#include <verify.h>
-\f
-scm_t_bits scm_tc16_frame;
+/* 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);
-#define RELOC(frame, val) (val + SCM_VM_FRAME_OFFSET (frame))
+\f
+#define RELOC(frame, val) \
+ (((SCM *) (val)) + SCM_VM_FRAME_OFFSET (frame))
SCM
scm_c_make_frame (SCM stack_holder, SCM *fp, SCM *sp,
p->sp = sp;
p->ip = ip;
p->offset = offset;
- SCM_RETURN_NEWSMOB (scm_tc16_frame, p);
+ return scm_cell (scm_tc7_frame, (scm_t_bits)p);
}
-static int
-frame_print (SCM frame, SCM port, scm_print_state *pstate)
+void
+scm_i_frame_print (SCM frame, SCM port, scm_print_state *pstate)
{
scm_puts ("#<frame ", port);
scm_uintprint (SCM_UNPACK (frame), 16, port);
scm_write (scm_frame_procedure (frame), port);
/* don't write args, they can get us into trouble. */
scm_puts (">", port);
-
- return 1;
}
\f
}
#undef FUNC_NAME
-SCM
-scm_frame_source (SCM frame)
+SCM_DEFINE (scm_frame_source, "frame-source", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_source
{
- static SCM var = SCM_BOOL_F;
-
- if (scm_is_false (var))
- var = scm_c_module_lookup (scm_c_resolve_module ("system vm frame"),
- "frame-source");
+ SCM proc;
- return scm_call_1 (SCM_VARIABLE_REF (var), frame);
+ SCM_VALIDATE_VM_FRAME (1, frame);
+
+ proc = scm_frame_procedure (frame);
+
+ if (SCM_PROGRAM_P (proc))
+ return scm_program_source (scm_frame_procedure (frame),
+ scm_frame_instruction_pointer (frame),
+ SCM_UNDEFINED);
+
+ return SCM_BOOL_F;
}
+#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
p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
while (p <= sp)
{
- if (p + 1 < sp && p[1] == (SCM)0)
+ if (SCM_UNPACK (p[0]) == 0)
/* skip over not-yet-active frame */
p += 3;
else
p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
while (p <= sp)
{
- if (p + 1 < sp && p[1] == (SCM)0)
+ if (SCM_UNPACK (p[0]) == 0)
/* skip over not-yet-active frame */
p += 3;
else if (n == i)
p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
while (p <= sp)
{
- if (p + 1 < sp && p[1] == (SCM)0)
+ if (SCM_UNPACK (p[0]) == 0)
/* skip over not-yet-active frame */
p += 3;
else if (n == i)
}
#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 (scm_frame_procedure (frame));
- return scm_from_ulong ((unsigned long)
- (SCM_VM_FRAME_IP (frame)
- - SCM_C_OBJCODE_BASE (c_objcode)));
+ 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
#define FUNC_NAME s_scm_frame_return_address
{
SCM_VALIDATE_VM_FRAME (1, frame);
- return scm_from_ulong ((unsigned long)
- (SCM_FRAME_RETURN_ADDRESS
- (SCM_VM_FRAME_FP (frame))));
+ return scm_from_unsigned_integer ((scm_t_bits)
+ (SCM_FRAME_RETURN_ADDRESS
+ (SCM_VM_FRAME_FP (frame))));
}
#undef FUNC_NAME
#define FUNC_NAME s_scm_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))));
+ return scm_from_unsigned_integer ((scm_t_bits)
+ (SCM_FRAME_MV_RETURN_ADDRESS
+ (SCM_VM_FRAME_FP (frame))));
}
#undef FUNC_NAME
#define FUNC_NAME s_scm_frame_previous
{
SCM *this_fp, *new_fp, *new_sp;
+ SCM proc;
SCM_VALIDATE_VM_FRAME (1, frame);
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_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)))
+ proc = scm_frame_procedure (frame);
+
+ if (SCM_PROGRAM_P (proc) && SCM_PROGRAM_IS_BOOT (proc))
goto again;
else
return frame;
#undef FUNC_NAME
\f
-void
-scm_bootstrap_frames (void)
-{
- scm_tc16_frame = scm_make_smob_type ("frame", 0);
- scm_set_smob_print (scm_tc16_frame, frame_print);
-}
-
void
scm_init_frames (void)
{