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/* Copyright (C) 2001 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 2.1 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
*/
/* This file is included in vm.c multiple times */
#if (VM_ENGINE == SCM_VM_REGULAR_ENGINE)
#define VM_USE_HOOKS 0 /* Various hooks */
#define VM_USE_CLOCK 0 /* Bogoclock */
#define VM_CHECK_EXTERNAL 1 /* Check external link */
#define VM_CHECK_OBJECT 1 /* Check object table */
#define VM_PUSH_DEBUG_FRAMES 0 /* Push frames onto the evaluator debug stack */
#elif (VM_ENGINE == SCM_VM_DEBUG_ENGINE)
#define VM_USE_HOOKS 1
#define VM_USE_CLOCK 1
#define VM_CHECK_EXTERNAL 1
#define VM_CHECK_OBJECT 1
#define VM_PUSH_DEBUG_FRAMES 1
#else
#error unknown debug engine VM_ENGINE
#endif
#include "vm-engine.h"
static SCM
VM_NAME (struct scm_vm *vp, SCM program, SCM *argv, int nargs)
{
/* VM registers */
register scm_byte_t *ip IP_REG; /* instruction pointer */
register SCM *sp SP_REG; /* stack pointer */
register SCM *fp FP_REG; /* frame pointer */
/* Cache variables */
struct scm_objcode *bp = NULL; /* program base pointer */
SCM external = SCM_EOL; /* external environment */
SCM *objects = NULL; /* constant objects */
size_t object_count = 0; /* length of OBJECTS */
SCM *stack_base = vp->stack_base; /* stack base address */
SCM *stack_limit = vp->stack_limit; /* stack limit address */
/* Internal variables */
int nvalues = 0;
long start_time = scm_c_get_internal_run_time ();
SCM finish_args; /* used both for returns: both in error
and normal situations */
#if VM_USE_HOOKS
SCM hook_args = SCM_EOL;
#endif
#ifdef HAVE_LABELS_AS_VALUES
static void **jump_table = NULL;
#endif
#if VM_PUSH_DEBUG_FRAMES
scm_t_debug_frame debug;
scm_t_debug_info debug_vect_body;
debug.status = SCM_VOIDFRAME;
#endif
#ifdef HAVE_LABELS_AS_VALUES
if (SCM_UNLIKELY (!jump_table))
{
int i;
jump_table = malloc (SCM_VM_NUM_INSTRUCTIONS * sizeof(void*));
for (i = 0; i < SCM_VM_NUM_INSTRUCTIONS; i++)
jump_table[i] = &&vm_error_bad_instruction;
#define VM_INSTRUCTION_TO_LABEL 1
#include <libguile/vm-expand.h>
#include <libguile/vm-i-system.i>
#include <libguile/vm-i-scheme.i>
#include <libguile/vm-i-loader.i>
#undef VM_INSTRUCTION_TO_LABEL
}
#endif
/* Initialization */
{
SCM prog = program;
/* Boot program */
program = vm_make_boot_program (nargs);
#if VM_PUSH_DEBUG_FRAMES
debug.prev = scm_i_last_debug_frame ();
debug.status = SCM_APPLYFRAME;
debug.vect = &debug_vect_body;
debug.vect[0].a.proc = program; /* the boot program */
debug.vect[0].a.args = SCM_EOL;
scm_i_set_last_debug_frame (&debug);
#endif
/* Initial frame */
CACHE_REGISTER ();
CACHE_PROGRAM ();
PUSH (program);
NEW_FRAME ();
/* Initial arguments */
PUSH (prog);
if (SCM_UNLIKELY (sp + nargs >= stack_limit))
goto vm_error_too_many_args;
while (nargs--)
PUSH (*argv++);
}
/* Let's go! */
BOOT_HOOK ();
NEXT;
#ifndef HAVE_LABELS_AS_VALUES
vm_start:
switch ((*ip++) & SCM_VM_INSTRUCTION_MASK) {
#endif
#include "vm-expand.h"
#include "vm-i-system.c"
#include "vm-i-scheme.c"
#include "vm-i-loader.c"
#ifndef HAVE_LABELS_AS_VALUES
default:
goto vm_error_bad_instruction;
}
#endif
vm_done:
SYNC_ALL ();
#if VM_PUSH_DEBUG_FRAMES
scm_i_set_last_debug_frame (debug.prev);
#endif
return finish_args;
/* Errors */
{
SCM err_msg;
vm_error_bad_instruction:
err_msg = scm_from_locale_string ("VM: Bad instruction: ~A");
finish_args = scm_list_1 (scm_from_uchar (ip[-1]));
goto vm_error;
vm_error_unbound:
err_msg = scm_from_locale_string ("VM: Unbound variable: ~A");
goto vm_error;
vm_error_wrong_type_arg:
err_msg = scm_from_locale_string ("VM: Wrong type argument");
finish_args = SCM_EOL;
goto vm_error;
vm_error_too_many_args:
err_msg = scm_from_locale_string ("VM: Too many arguments");
finish_args = scm_list_1 (scm_from_int (nargs));
goto vm_error;
vm_error_wrong_num_args:
/* nargs and program are valid */
SYNC_ALL ();
scm_wrong_num_args (program);
/* shouldn't get here */
goto vm_error;
vm_error_wrong_type_apply:
err_msg = scm_from_locale_string ("VM: Wrong type to apply: ~S "
"[IP offset: ~a]");
finish_args = scm_list_2 (program,
SCM_I_MAKINUM (ip - bp->base));
goto vm_error;
vm_error_stack_overflow:
err_msg = scm_from_locale_string ("VM: Stack overflow");
finish_args = SCM_EOL;
goto vm_error;
vm_error_stack_underflow:
err_msg = scm_from_locale_string ("VM: Stack underflow");
finish_args = SCM_EOL;
goto vm_error;
vm_error_improper_list:
err_msg = scm_from_locale_string ("VM: Attempt to unroll an improper list: tail is ~A");
goto vm_error;
vm_error_not_a_pair:
SYNC_ALL ();
scm_wrong_type_arg_msg (FUNC_NAME, 1, finish_args, "pair");
/* shouldn't get here */
goto vm_error;
vm_error_no_values:
err_msg = scm_from_locale_string ("VM: 0-valued return");
finish_args = SCM_EOL;
goto vm_error;
vm_error_not_enough_values:
err_msg = scm_from_locale_string ("VM: Not enough values for mv-bind");
finish_args = SCM_EOL;
goto vm_error;
#if VM_CHECK_IP
vm_error_invalid_address:
err_msg = scm_from_locale_string ("VM: Invalid program address");
finish_args = SCM_EOL;
goto vm_error;
#endif
#if VM_CHECK_EXTERNAL
vm_error_external:
err_msg = scm_from_locale_string ("VM: Invalid external access");
finish_args = SCM_EOL;
goto vm_error;
#endif
#if VM_CHECK_OBJECT
vm_error_object:
err_msg = scm_from_locale_string ("VM: Invalid object table access");
finish_args = SCM_EOL;
goto vm_error;
#endif
vm_error:
SYNC_ALL ();
scm_ithrow (sym_vm_error, scm_list_3 (sym_vm_run, err_msg, finish_args),
1);
}
abort (); /* never reached */
}
#undef VM_USE_HOOKS
#undef VM_USE_CLOCK
#undef VM_CHECK_EXTERNAL
#undef VM_CHECK_OBJECT
#undef VM_PUSH_DEBUG_FRAMES
/*
Local Variables:
c-file-style: "gnu"
End:
*/
|
