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9a8cc8e7f7
* libguile/vm-engine.c: Call scm_wrong_num_args in the wrong-num-args case, to be more like the interpreter. * libguile/vm-engine.h (ASSERT): New macro. * libguile/vm-i-system.c (apply, goto/apply): Assert that nargs >= 2, because the compiler should always feed us correct instructions. (call/cc): If no values are returned to the continuation, signal no_values instead of wrong_num_args.
475 lines
12 KiB
C
475 lines
12 KiB
C
/* Copyright (C) 2001 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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/* This file is included in vm_engine.c */
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/*
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* Options
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*/
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#define VM_USE_HOOKS 1 /* Various hooks */
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#define VM_USE_CLOCK 1 /* Bogoclock */
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#define VM_CHECK_EXTERNAL 1 /* Check external link */
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#define VM_CHECK_OBJECT 1 /* Check object table */
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/*
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* Registers
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*/
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/* Register optimization. [ stolen from librep/src/lispmach.h,v 1.3 ]
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Some compilers underestimate the use of the local variables representing
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the abstract machine registers, and don't put them in hardware registers,
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which slows down the interpreter considerably.
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For GCC, I have hand-assigned hardware registers for several architectures.
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*/
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#ifdef __GNUC__
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#ifdef __mips__
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#define IP_REG asm("$16")
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#define SP_REG asm("$17")
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#define FP_REG asm("$18")
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#endif
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#ifdef __sparc__
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#define IP_REG asm("%l0")
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#define SP_REG asm("%l1")
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#define FP_REG asm("%l2")
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#endif
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#ifdef __alpha__
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#ifdef __CRAY__
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#define IP_REG asm("r9")
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#define SP_REG asm("r10")
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#define FP_REG asm("r11")
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#else
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#define IP_REG asm("$9")
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#define SP_REG asm("$10")
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#define FP_REG asm("$11")
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#endif
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#endif
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#ifdef __i386__
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#define IP_REG asm("%esi")
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#define SP_REG asm("%edi")
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#define FP_REG
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#endif
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#if defined(PPC) || defined(_POWER) || defined(_IBMR2)
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#define IP_REG asm("26")
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#define SP_REG asm("27")
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#define FP_REG asm("28")
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#endif
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#ifdef __hppa__
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#define IP_REG asm("%r18")
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#define SP_REG asm("%r17")
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#define FP_REG asm("%r16")
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#endif
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#ifdef __mc68000__
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#define IP_REG asm("a5")
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#define SP_REG asm("a4")
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#define FP_REG
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#endif
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#ifdef __arm__
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#define IP_REG asm("r9")
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#define SP_REG asm("r8")
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#define FP_REG asm("r7")
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#endif
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#endif
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#ifndef IP_REG
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#define IP_REG
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#endif
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#ifndef SP_REG
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#define SP_REG
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#endif
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#ifndef FP_REG
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#define FP_REG
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#endif
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/*
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* Cache/Sync
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*/
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#define ENABLE_ASSERTIONS
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#ifdef ENABLE_ASSERTIONS
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# define ASSERT(condition) if (SCM_UNLIKELY (!(condition))) abort()
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#else
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# define ASSERT(condition)
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#endif
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#define CACHE_REGISTER() \
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{ \
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ip = vp->ip; \
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sp = vp->sp; \
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fp = vp->fp; \
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stack_base = fp ? SCM_FRAME_UPPER_ADDRESS (fp) - 1 : vp->stack_base; \
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}
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#define SYNC_REGISTER() \
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{ \
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vp->ip = ip; \
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vp->sp = sp; \
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vp->fp = fp; \
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}
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#ifdef IP_PARANOIA
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#define CHECK_IP() \
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do { if (ip < bp->base || ip - bp->base > bp->size) abort (); } while (0)
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#else
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#define CHECK_IP()
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#endif
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/* Get a local copy of the program's "object table" (i.e. the vector of
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external bindings that are referenced by the program), initialized by
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`load-program'. */
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/* XXX: We could instead use the "simple vector macros", thus not having to
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call `scm_vector_writable_elements ()' and the likes. */
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#define CACHE_PROGRAM() \
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{ \
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ssize_t _vincr; \
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\
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if (bp != SCM_PROGRAM_DATA (program)) { \
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bp = SCM_PROGRAM_DATA (program); \
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/* Was: objects = SCM_VELTS (bp->objs); */ \
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\
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if (objects) \
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scm_array_handle_release (&objects_handle); \
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\
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objects = scm_vector_writable_elements (bp->objs, &objects_handle, \
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&object_count, &_vincr); \
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} \
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}
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#define SYNC_BEFORE_GC() \
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{ \
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SYNC_REGISTER (); \
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}
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#define SYNC_ALL() \
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{ \
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SYNC_REGISTER (); \
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}
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/*
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* Error check
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*/
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#undef CHECK_EXTERNAL
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#if VM_CHECK_EXTERNAL
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#define CHECK_EXTERNAL(e) \
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do { if (!SCM_CONSP (e)) goto vm_error_external; } while (0)
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#else
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#define CHECK_EXTERNAL(e)
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#endif
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/* Accesses to a program's object table. */
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#if VM_CHECK_OBJECT
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#define CHECK_OBJECT(_num) \
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do { if ((_num) >= object_count) goto vm_error_object; } while (0)
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#else
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#define CHECK_OBJECT(_num)
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#endif
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/*
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* Hooks
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*/
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#undef RUN_HOOK
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#if VM_USE_HOOKS
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#define RUN_HOOK(h) \
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{ \
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if (!SCM_FALSEP (vp->hooks[h])) \
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{ \
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SYNC_REGISTER (); \
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vm_heapify_frames (vm); \
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scm_c_run_hook (vp->hooks[h], hook_args); \
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CACHE_REGISTER (); \
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} \
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}
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#else
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#define RUN_HOOK(h)
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#endif
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#define BOOT_HOOK() RUN_HOOK (SCM_VM_BOOT_HOOK)
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#define HALT_HOOK() RUN_HOOK (SCM_VM_HALT_HOOK)
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#define NEXT_HOOK() RUN_HOOK (SCM_VM_NEXT_HOOK)
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#define BREAK_HOOK() RUN_HOOK (SCM_VM_BREAK_HOOK)
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#define ENTER_HOOK() RUN_HOOK (SCM_VM_ENTER_HOOK)
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#define APPLY_HOOK() RUN_HOOK (SCM_VM_APPLY_HOOK)
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#define EXIT_HOOK() RUN_HOOK (SCM_VM_EXIT_HOOK)
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#define RETURN_HOOK() RUN_HOOK (SCM_VM_RETURN_HOOK)
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/*
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* Stack operation
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*/
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#define CHECK_OVERFLOW() \
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if (sp > stack_limit) \
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goto vm_error_stack_overflow
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#define CHECK_UNDERFLOW() \
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if (sp < stack_base) \
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goto vm_error_stack_underflow;
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#define PUSH(x) do { sp++; CHECK_OVERFLOW (); *sp = x; } while (0)
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#define DROP() do { sp--; CHECK_UNDERFLOW (); } while (0)
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#define DROPN(_n) do { sp -= (_n); CHECK_UNDERFLOW (); } while (0)
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#define POP(x) do { x = *sp; DROP (); } while (0)
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/* A fast CONS. This has to be fast since its used, for instance, by
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POP_LIST when fetching a function's argument list. Note: `scm_cell' is an
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inlined function in Guile 1.7. Unfortunately, it calls
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`scm_gc_for_newcell ()' which is _not_ inlined and allocated cells on the
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heap. XXX */
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#define CONS(x,y,z) \
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{ \
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SYNC_BEFORE_GC (); \
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x = scm_cell (SCM_UNPACK (y), SCM_UNPACK (z)); \
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}
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/* Pop the N objects on top of the stack and push a list that contains
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them. */
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#define POP_LIST(n) \
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do \
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{ \
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int i; \
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SCM l = SCM_EOL; \
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sp -= n; \
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for (i = n; i; i--) \
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CONS (l, sp[i], l); \
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PUSH (l); \
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} while (0)
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/* Below is a (slightly broken) experiment to avoid calling `scm_cell' and to
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allocate cells on the stack. This is a significant improvement for
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programs which call a lot of procedures, since the procedure call
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mechanism uses POP_LIST which normally uses `scm_cons'.
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What it does is that it creates a list whose cells are allocated on the
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VM's stack instead of being allocated on the heap via `scm_cell'. This is
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much faster. However, if the callee does something like:
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(lambda (. args)
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(set! the-args args))
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then terrible things may happen since the list of arguments may be
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overwritten later on. */
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/* Awful hack that aligns PTR so that it can be considered as a non-immediate
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value by Guile. */
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#define ALIGN_AS_NON_IMMEDIATE(_ptr) \
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{ \
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if ((scm_t_bits)(_ptr) & 6) \
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{ \
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size_t _incr; \
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\
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_incr = (scm_t_bits)(_ptr) & 6; \
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_incr = (~_incr) & 7; \
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(_ptr) += _incr; \
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} \
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}
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#define POP_LIST_ON_STACK(n) \
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do \
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{ \
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int i; \
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if (n == 0) \
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{ \
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sp -= n; \
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PUSH (SCM_EOL); \
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} \
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else \
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{ \
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SCM *list_head, *list; \
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\
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list_head = sp + 1; \
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ALIGN_AS_NON_IMMEDIATE (list_head); \
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list = list_head; \
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\
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sp -= n; \
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for (i = 1; i <= n; i++) \
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{ \
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/* The cell's car and cdr. */ \
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*(list) = sp[i]; \
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*(list + 1) = PTR2SCM (list + 2); \
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list += 2; \
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} \
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\
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/* The last pair's cdr is '(). */ \
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list--; \
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*list = SCM_EOL; \
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/* Push the SCM object that points */ \
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/* to the first cell. */ \
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PUSH (PTR2SCM (list_head)); \
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} \
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} \
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while (0)
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/* end of the experiment */
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#define POP_LIST_MARK() \
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do { \
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SCM o; \
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SCM l = SCM_EOL; \
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POP (o); \
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while (!SCM_UNBNDP (o)) \
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{ \
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CONS (l, o, l); \
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POP (o); \
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} \
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PUSH (l); \
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} while (0)
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#define POP_CONS_MARK() \
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do { \
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SCM o, l; \
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POP (l); \
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POP (o); \
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while (!SCM_UNBNDP (o)) \
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{ \
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CONS (l, o, l); \
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POP (o); \
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} \
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PUSH (l); \
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} while (0)
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/*
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* Instruction operation
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*/
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#define FETCH() (*ip++)
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#define FETCH_LENGTH(len) do { ip = vm_fetch_length (ip, &len); } while (0)
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#undef CLOCK
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#if VM_USE_CLOCK
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#define CLOCK(n) vp->clock += n
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#else
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#define CLOCK(n)
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#endif
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#undef NEXT_JUMP
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#ifdef HAVE_LABELS_AS_VALUES
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#define NEXT_JUMP() goto *jump_table[FETCH ()]
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#else
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#define NEXT_JUMP() goto vm_start
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#endif
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#define NEXT \
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{ \
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CLOCK (1); \
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NEXT_HOOK (); \
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NEXT_JUMP (); \
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}
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/*
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* Stack frame
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*/
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#define INIT_ARGS() \
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{ \
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if (bp->nrest) \
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{ \
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int n = nargs - (bp->nargs - 1); \
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if (n < 0) \
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goto vm_error_wrong_num_args; \
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POP_LIST (n); \
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} \
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else \
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{ \
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if (nargs != bp->nargs) \
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goto vm_error_wrong_num_args; \
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} \
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}
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/* See frames.h for the layout of stack frames */
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/* When this is called, bp points to the new program data,
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and the arguments are already on the stack */
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#define NEW_FRAME() \
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{ \
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int i; \
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SCM *dl, *data; \
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scm_byte_t *ra = ip; \
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\
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/* Save old registers */ \
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ra = ip; \
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dl = fp; \
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\
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/* New registers */ \
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fp = sp - bp->nargs + 1; \
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data = SCM_FRAME_DATA_ADDRESS (fp); \
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sp = data + 4; \
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CHECK_OVERFLOW (); \
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stack_base = sp; \
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ip = bp->base; \
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\
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/* Init local variables */ \
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for (i=bp->nlocs; i; i--) \
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data[-i] = SCM_UNDEFINED; \
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\
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/* Create external variables */ \
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external = bp->external; \
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for (i = 0; i < bp->nexts; i++) \
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CONS (external, SCM_UNDEFINED, external); \
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\
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/* Set frame data */ \
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data[4] = (SCM)ra; \
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data[3] = 0x0; \
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data[2] = (SCM)dl; \
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data[1] = SCM_BOOL_F; \
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data[0] = external; \
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}
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#define CACHE_EXTERNAL() external = fp[bp->nargs + bp->nlocs]
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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