-/* Copyright (C) 2001 Free Software Foundation, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; see the file COPYING. If not, write to
- * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
- * Boston, MA 02111-1307 USA
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE. If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way. To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * If you write modifications of your own for GUILE, it is your choice
- * whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice. */
-
-/* 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 "vm-expand.h"
-#include "vm-i-system.i"
-#include "vm-i-scheme.i"
-#include "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_LIST1 (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_LIST1 (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_LIST2 (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;
-
- vm_error_no_such_module:
- err_msg = scm_from_locale_string ("VM: No such module: ~A");
- 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_LIST3 (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:
-*/
+/* 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
+ * 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
+ */
+
+/* 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_CHECK_OBJECT 0 /* Check object table */
+#define VM_CHECK_FREE_VARIABLES 0 /* Check free variable access */
+#define VM_CHECK_UNDERFLOW 0 /* Check underflow when popping values */
+#elif (VM_ENGINE == SCM_VM_DEBUG_ENGINE)
+#define VM_USE_HOOKS 1
+#define VM_CHECK_OBJECT 0
+#define VM_CHECK_FREE_VARIABLES 0
+#define VM_CHECK_UNDERFLOW 0 /* Check underflow when popping values */
+#else
+#error unknown debug engine VM_ENGINE
+#endif
+
+#include "vm-engine.h"
+
+
+static SCM
+VM_NAME (SCM vm, SCM program, SCM *argv, int nargs)
+{
+ /* VM registers */
+ register scm_t_uint8 *ip IP_REG; /* instruction pointer */
+ register SCM *sp SP_REG; /* stack pointer */
+ register SCM *fp FP_REG; /* frame pointer */
+ struct scm_vm *vp = SCM_VM_DATA (vm);
+
+ /* Cache variables */
+ struct scm_objcode *bp = NULL; /* program base pointer */
+ SCM *objects = NULL; /* constant objects */
+#if VM_CHECK_OBJECT
+ size_t object_count = 0; /* length of OBJECTS */
+#endif
+ SCM *stack_limit = vp->stack_limit; /* stack limit address */
+
+ scm_i_thread *current_thread = SCM_I_CURRENT_THREAD;
+ scm_t_int64 vm_cookie = vp->cookie++;
+
+ /* Internal variables */
+ int nvalues = 0;
+
+#ifdef HAVE_LABELS_AS_VALUES
+ static const void **jump_table_pointer = NULL;
+#endif
+
+#ifdef HAVE_LABELS_AS_VALUES
+ register const void **jump_table JT_REG;
+
+ if (SCM_UNLIKELY (!jump_table_pointer))
+ {
+ int i;
+ jump_table_pointer = malloc (SCM_VM_NUM_INSTRUCTIONS * sizeof (void*));
+ for (i = 0; i < SCM_VM_NUM_INSTRUCTIONS; i++)
+ jump_table_pointer[i] = &&vm_error_bad_instruction;
+#define VM_INSTRUCTION_TO_LABEL 1
+#define jump_table jump_table_pointer
+#include <libguile/vm-expand.h>
+#include <libguile/vm-i-system.i>
+#include <libguile/vm-i-scheme.i>
+#include <libguile/vm-i-loader.i>
+#undef jump_table
+#undef VM_INSTRUCTION_TO_LABEL
+ }
+
+ /* Attempt to keep JUMP_TABLE_POINTER in a register. This saves one
+ load instruction at each instruction dispatch. */
+ jump_table = jump_table_pointer;
+#endif
+
+ /* Initial frame */
+ CACHE_REGISTER ();
+ PUSH (SCM_PACK (fp)); /* dynamic link */
+ PUSH (SCM_PACK (0)); /* mvra */
+ PUSH (SCM_PACK (ip)); /* ra */
+ PUSH (boot_continuation);
+ fp = sp + 1;
+ ip = SCM_C_OBJCODE_BASE (SCM_PROGRAM_DATA (boot_continuation));
+
+ /* MV-call frame, function & arguments */
+ PUSH (SCM_PACK (fp)); /* dynamic link */
+ PUSH (SCM_PACK (ip + 1)); /* mvra */
+ PUSH (SCM_PACK (ip)); /* ra */
+ PUSH (program);
+ fp = sp + 1;
+ VM_ASSERT (sp + nargs < stack_limit, vm_error_too_many_args (nargs));
+ while (nargs--)
+ PUSH (*argv++);
+
+ PUSH_CONTINUATION_HOOK ();
+
+ apply:
+ program = fp[-1];
+ if (!SCM_PROGRAM_P (program))
+ {
+ if (SCM_STRUCTP (program) && SCM_STRUCT_APPLICABLE_P (program))
+ fp[-1] = SCM_STRUCT_PROCEDURE (program);
+ else if (SCM_NIMP (program) && SCM_TYP7 (program) == scm_tc7_smob
+ && SCM_SMOB_APPLICABLE_P (program))
+ {
+ /* (smob arg0 ... argN) => (apply-smob smob arg0 ... argN) */
+ int i;
+ PUSH (SCM_BOOL_F);
+ for (i = sp - fp; i >= 0; i--)
+ fp[i] = fp[i - 1];
+ fp[-1] = SCM_SMOB_DESCRIPTOR (program).apply_trampoline_objcode;
+ }
+ else
+ {
+ SYNC_ALL();
+ vm_error_wrong_type_apply (program);
+ }
+ goto apply;
+ }
+
+ CACHE_PROGRAM ();
+ ip = SCM_C_OBJCODE_BASE (bp);
+
+ APPLY_HOOK ();
+
+ /* Let's go! */
+ 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
+
+ abort (); /* never reached */
+
+ vm_error_bad_instruction:
+ vm_error_bad_instruction (ip[-1]);
+ abort (); /* never reached */
+
+ handle_overflow:
+ SYNC_ALL ();
+ vm_error_stack_overflow (vp);
+ abort (); /* never reached */
+}
+
+#undef VM_USE_HOOKS
+#undef VM_CHECK_OBJECT
+#undef VM_CHECK_FREE_VARIABLE
+#undef VM_CHECK_UNDERFLOW
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/
HCoop / bpt / guile.git / blobdiff