-/* Copyright (C) 2001, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+/* Copyright (C) 2001, 2009, 2010, 2011, 2012, 2013, 2014 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 "vm.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 (sizeof (struct scm_vm_frame) == 3 * 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)
+scm_c_make_frame (enum scm_vm_frame_kind kind, const struct scm_frame *frame)
{
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);
+ p->stack_holder = frame->stack_holder;
+ p->fp_offset = frame->fp_offset;
+ p->sp_offset = frame->sp_offset;
+ p->ip = frame->ip;
+ return scm_cell (scm_tc7_frame | (kind << 8), (scm_t_bits)p);
}
void
scm_puts_unlocked (">", port);
}
+static SCM*
+frame_stack_base (enum scm_vm_frame_kind kind, const struct scm_frame *frame)
+{
+ switch (kind)
+ {
+ case SCM_VM_FRAME_KIND_CONT:
+ return ((struct scm_vm_cont *) frame->stack_holder)->stack_base;
+
+ case SCM_VM_FRAME_KIND_VM:
+ return ((struct scm_vm *) frame->stack_holder)->stack_base;
+
+ default:
+ abort ();
+ }
+}
+
+static scm_t_ptrdiff
+frame_offset (enum scm_vm_frame_kind kind, const struct scm_frame *frame)
+{
+ switch (kind)
+ {
+ case SCM_VM_FRAME_KIND_CONT:
+ return ((struct scm_vm_cont *) frame->stack_holder)->reloc;
+
+ case SCM_VM_FRAME_KIND_VM:
+ return 0;
+
+ default:
+ abort ();
+ }
+}
+
+SCM*
+scm_i_frame_stack_base (SCM frame)
+#define FUNC_NAME "frame-stack-base"
+{
+ SCM_VALIDATE_VM_FRAME (1, frame);
+
+ return frame_stack_base (SCM_VM_FRAME_KIND (frame),
+ SCM_VM_FRAME_DATA (frame));
+}
+#undef FUNC_NAME
+
+scm_t_ptrdiff
+scm_i_frame_offset (SCM frame)
+#define FUNC_NAME "frame-offset"
+{
+ SCM_VALIDATE_VM_FRAME (1, frame);
+
+ return frame_offset (SCM_VM_FRAME_KIND (frame),
+ SCM_VM_FRAME_DATA (frame));
+
+}
+#undef FUNC_NAME
+
\f
/* Scheme interface */
}
#undef FUNC_NAME
+/* Retrieve the local in slot 0, which may or may not actually be a
+ procedure, and may or may not actually be the procedure being
+ applied. If you want the procedure, look it up from the IP. */
+SCM
+scm_c_frame_closure (enum scm_vm_frame_kind kind, const struct scm_frame *frame)
+{
+ SCM *fp, *sp;
+
+ fp = frame_stack_base (kind, frame) + frame->fp_offset;
+ sp = frame_stack_base (kind, frame) + frame->sp_offset;
+
+ if (SCM_FRAME_NUM_LOCALS (fp, sp) > 0)
+ return SCM_FRAME_LOCAL (fp, 0);
+
+ return SCM_BOOL_F;
+}
+
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));
+
+ /* FIXME: Retrieve procedure from address? */
+ return scm_c_frame_closure (SCM_VM_FRAME_KIND (frame),
+ SCM_VM_FRAME_DATA (frame));
}
#undef FUNC_NAME
+static SCM frame_arguments_var;
+
+static void
+init_frame_arguments_var (void)
+{
+ frame_arguments_var
+ = scm_c_private_lookup ("system vm frame", "frame-arguments");
+}
+
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;
-
+ static scm_i_pthread_once_t once = SCM_I_PTHREAD_ONCE_INIT;
+ scm_i_pthread_once (&once, init_frame_arguments_var);
+
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 (frame_arguments_var), frame);
+}
+#undef FUNC_NAME
+
+static SCM frame_call_representation_var;
- return scm_call_1 (SCM_VARIABLE_REF (var), frame);
+static void
+init_frame_call_representation_var (void)
+{
+ frame_call_representation_var
+ = scm_c_private_lookup ("system vm frame", "frame-call-representation");
+}
+
+SCM scm_frame_call_representation (SCM frame)
+#define FUNC_NAME "frame-call-representation"
+{
+ static scm_i_pthread_once_t once = SCM_I_PTHREAD_ONCE_INIT;
+ scm_i_pthread_once (&once, init_frame_call_representation_var);
+
+ SCM_VALIDATE_VM_FRAME (1, frame);
+
+ return scm_call_1 (scm_variable_ref (frame_call_representation_var), frame);
}
#undef FUNC_NAME
"")
#define FUNC_NAME s_scm_frame_source
{
- SCM proc;
-
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;
+ return scm_find_source_for_addr (scm_frame_instruction_pointer (frame));
}
#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 *fp, *sp, *p;
- unsigned int n = 0;
+ SCM *fp, *sp;
SCM_VALIDATE_VM_FRAME (1, frame);
fp = SCM_VM_FRAME_FP (frame);
sp = SCM_VM_FRAME_SP (frame);
- p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
-
- if (SCM_RTL_PROGRAM_P (fp[-1]))
- /* The frame size of an RTL program is fixed, except in the case of
- passing a wrong number of arguments to the program. So we do
- need to use an SP for determining the number of locals. */
- return scm_from_uint32 (sp + 1 - p);
- 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);
+ return scm_from_ptrdiff_t (SCM_FRAME_NUM_LOCALS (fp, sp));
}
#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;
+ SCM *fp, *sp;
unsigned int i;
SCM_VALIDATE_VM_FRAME (1, frame);
SCM_VALIDATE_UINT_COPY (2, index, i);
+ fp = SCM_VM_FRAME_FP (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 if (n == i)
- return *p;
- else
- {
- p++;
- n++;
- }
- }
+
+ if (i < SCM_FRAME_NUM_LOCALS (fp, sp))
+ return SCM_FRAME_LOCAL (fp, i);
+
SCM_OUT_OF_RANGE (SCM_ARG2, index);
}
#undef FUNC_NAME
"")
#define FUNC_NAME s_scm_frame_local_set_x
{
- SCM *sp, *p;
- unsigned int n = 0;
+ SCM *fp, *sp;
unsigned int i;
SCM_VALIDATE_VM_FRAME (1, frame);
SCM_VALIDATE_UINT_COPY (2, index, i);
+ fp = SCM_VM_FRAME_FP (frame);
sp = SCM_VM_FRAME_SP (frame);
- p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
- while (p <= sp)
+
+ if (i < SCM_FRAME_NUM_LOCALS (fp, 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_FRAME_LOCAL (fp, i) = val;
+ return SCM_UNSPECIFIED;
}
+
SCM_OUT_OF_RANGE (SCM_ARG2, index);
}
#undef FUNC_NAME
#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));
+ return scm_from_ptrdiff_t (SCM_VM_FRAME_FP_OFFSET (frame));
}
#undef FUNC_NAME
{
SCM_VALIDATE_VM_FRAME (1, frame);
- return scm_from_unsigned_integer ((scm_t_bits) SCM_VM_FRAME_SP (frame));
+ return scm_from_ptrdiff_t (SCM_VM_FRAME_SP_OFFSET (frame));
}
#undef FUNC_NAME
"")
#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)));
+ return scm_from_uintptr_t ((scm_t_uintptr) SCM_VM_FRAME_IP (frame));
}
#undef FUNC_NAME
#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))));
+ return scm_from_uintptr_t ((scm_t_uintptr) (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
+#define RELOC(kind, frame, val) \
+ (((SCM *) (val)) + frame_offset (kind, frame))
SCM_DEFINE (scm_frame_dynamic_link, "frame-dynamic-link", 1, 0, 0,
(SCM frame),
{
SCM_VALIDATE_VM_FRAME (1, frame);
/* fixme: munge fp if holder is a continuation */
- return scm_from_ulong
- ((unsigned long)
- RELOC (frame,
+ return scm_from_uintptr_t
+ ((scm_t_uintptr)
+ RELOC (SCM_VM_FRAME_KIND (frame), SCM_VM_FRAME_DATA (frame),
SCM_FRAME_DYNAMIC_LINK (SCM_VM_FRAME_FP (frame))));
}
#undef FUNC_NAME
+int
+scm_c_frame_previous (enum scm_vm_frame_kind kind, struct scm_frame *frame)
+{
+ SCM *this_fp, *new_fp, *new_sp;
+ SCM *stack_base = frame_stack_base (kind, frame);
+
+ again:
+ this_fp = frame->fp_offset + stack_base;
+
+ if (this_fp == stack_base)
+ return 0;
+
+ new_fp = SCM_FRAME_DYNAMIC_LINK (this_fp);
+
+ if (!new_fp)
+ return 0;
+
+ new_fp = RELOC (kind, frame, new_fp);
+
+ if (new_fp < stack_base)
+ return 0;
+
+ new_sp = SCM_FRAME_PREVIOUS_SP (this_fp);
+ frame->fp_offset = new_fp - stack_base;
+ frame->sp_offset = new_sp - stack_base;
+ frame->ip = SCM_FRAME_RETURN_ADDRESS (this_fp);
+
+ {
+ SCM proc = scm_c_frame_closure (kind, frame);
+ if (SCM_PROGRAM_P (proc) && SCM_PROGRAM_IS_BOOT (proc))
+ goto again;
+ }
+
+ return 1;
+}
+
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 proc;
+ enum scm_vm_frame_kind kind;
+ struct scm_frame tmp;
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));
- proc = scm_frame_procedure (frame);
-
- if (SCM_PROGRAM_P (proc) && SCM_PROGRAM_IS_BOOT (proc))
- goto again;
- else
- return frame;
- }
- else
+ kind = SCM_VM_FRAME_KIND (frame);
+ memcpy (&tmp, SCM_VM_FRAME_DATA (frame), sizeof tmp);
+
+ if (!scm_c_frame_previous (SCM_VM_FRAME_KIND (frame), &tmp))
return SCM_BOOL_F;
+
+ return scm_c_make_frame (kind, &tmp);
}
#undef FUNC_NAME
HCoop / bpt / guile.git / blobdiff