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author | Ludovic Courtès <ludo@gnu.org> | 2009-09-02 00:07:27 +0200 |
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committer | Ludovic Courtès <ludo@gnu.org> | 2009-09-02 01:37:37 +0200 |
commit | 5f236208d0d864546e59afa0f5a11c9b3ba14b10 (patch) | |
tree | eed5d9203a2633c8efb85c1b36425eab87574299 /libguile/frames.c | |
parent | f0eb5ae6c173aed35965b0561897fda1d8ff0db1 (diff) | |
parent | d7e7a02a6251c8ed4f76933d9d30baeee3f599c0 (diff) | |
download | guile-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.c | 272 |
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: +*/ |