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authorLudovic Courtès <ludo@gnu.org>2009-09-02 00:07:27 +0200
committerLudovic Courtès <ludo@gnu.org>2009-09-02 01:37:37 +0200
commit5f236208d0d864546e59afa0f5a11c9b3ba14b10 (patch)
treeeed5d9203a2633c8efb85c1b36425eab87574299 /libguile/vm-engine.c
parentf0eb5ae6c173aed35965b0561897fda1d8ff0db1 (diff)
parentd7e7a02a6251c8ed4f76933d9d30baeee3f599c0 (diff)
downloadguile-5f236208d0d864546e59afa0f5a11c9b3ba14b10.tar.gz
Merge branch 'boehm-demers-weiser-gc' into bdw-gc-static-alloc
Conflicts: acinclude.m4 libguile/strings.c
Diffstat (limited to 'libguile/vm-engine.c')
-rw-r--r--libguile/vm-engine.c273
1 files changed, 273 insertions, 0 deletions
diff --git a/libguile/vm-engine.c b/libguile/vm-engine.c
new file mode 100644
index 000000000..b373cd017
--- /dev/null
+++ b/libguile/vm-engine.c
@@ -0,0 +1,273 @@
+/* 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
+ */
+
+/* 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_OBJECT 1 /* Check object table */
+#define VM_CHECK_FREE_VARIABLES 1 /* Check free variable access */
+#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_OBJECT 1
+#define VM_CHECK_FREE_VARIABLES 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_t_uint8 *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 *free_vars = NULL; /* free variables */
+ size_t free_vars_count = 0; /* length of FREE_VARS */
+ 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 ();
+ PUSH ((SCM)fp); /* dynamic link */
+ PUSH (0); /* ra */
+ PUSH (0); /* mvra */
+ CACHE_PROGRAM ();
+ PUSH (program);
+ fp = sp + 1;
+ INIT_FRAME ();
+ /* MV-call frame, function & arguments */
+ PUSH ((SCM)fp); /* dynamic link */
+ PUSH (0); /* ra */
+ PUSH (0); /* mvra */
+ 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: ~s");
+ 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: ~s");
+ 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:
+ SYNC_ALL ();
+ scm_error (scm_misc_error_key, FUNC_NAME, "Wrong type to apply: ~S",
+ scm_list_1 (program), SCM_BOOL_F);
+ 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 ("Expected a proper list, but got object with tail ~s");
+ 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_not_a_bytevector:
+ SYNC_ALL ();
+ scm_wrong_type_arg_msg (FUNC_NAME, 1, finish_args, "bytevector");
+ /* shouldn't get here */
+ goto vm_error;
+
+ vm_error_no_values:
+ err_msg = scm_from_locale_string ("Zero values returned to single-valued continuation");
+ finish_args = SCM_EOL;
+ goto vm_error;
+
+ vm_error_not_enough_values:
+ err_msg = scm_from_locale_string ("Too few values returned to continuation");
+ finish_args = SCM_EOL;
+ goto vm_error;
+
+ vm_error_bad_wide_string_length:
+ err_msg = scm_from_locale_string ("VM: Bad wide string length: ~S");
+ 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_OBJECT
+ vm_error_object:
+ err_msg = scm_from_locale_string ("VM: Invalid object table access");
+ finish_args = SCM_EOL;
+ goto vm_error;
+#endif
+
+#if VM_CHECK_FREE_VARIABLES
+ vm_error_free_variable:
+ err_msg = scm_from_locale_string ("VM: Invalid free variable 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_OBJECT
+#undef VM_CHECK_FREE_VARIABLE
+#undef VM_PUSH_DEBUG_FRAMES
+
+/*
+ Local Variables:
+ c-file-style: "gnu"
+ End:
+*/