summaryrefslogtreecommitdiffstats
path: root/eval_vm.c
blob: 8db69f88040325f1f68fa47c0ad40c8f0135af5d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
/******************************************************************************
  Copyright (c) 1992, 1995, 1996 Xerox Corporation.  All rights reserved.
  Portions of this code were written by Stephen White, aka ghond.
  Use and copying of this software and preparation of derivative works based
  upon this software are permitted.  Any distribution of this software or
  derivative works must comply with all applicable United States export
  control laws.  This software is made available AS IS, and Xerox Corporation
  makes no warranty about the software, its performance or its conformity to
  any specification.  Any person obtaining a copy of this software is requested
  to send their name and post office or electronic mail address to:
    Pavel Curtis
    Xerox PARC
    3333 Coyote Hill Rd.
    Palo Alto, CA 94304
    Pavel@Xerox.Com
 *****************************************************************************/

#include "config.h"
#include "db_io.h"
#include "decompile.h"
#include "eval_vm.h"
#include "execute.h"
#include "log.h"
#include "options.h"
#include "storage.h"
#include "structures.h"
#include "tasks.h"

/**** external functions ****/

vm
new_vm(int task_id, int stack_size)
{
    vm the_vm = mymalloc(sizeof(vmstruct), M_VM);

    the_vm->task_id = task_id;
    the_vm->activ_stack = mymalloc(sizeof(activation) * stack_size, M_VM);

    return the_vm;
}

void
free_vm(vm the_vm, int stack_too)
{
    int i;

    if (stack_too)
	for (i = the_vm->top_activ_stack; i >= 0; i--)
	    free_activation(&the_vm->activ_stack[i], 1);
    myfree(the_vm->activ_stack, M_VM);
    myfree(the_vm, M_VM);
}

activation
top_activ(vm the_vm)
{
    return the_vm->activ_stack[the_vm->top_activ_stack];
}

Objid
progr_of_cur_verb(vm the_vm)
{
    return top_activ(the_vm).progr;
}

unsigned
suspended_lineno_of_vm(vm the_vm)
{
    activation top;

    top = top_activ(the_vm);
    return find_line_number(top.prog, (the_vm->top_activ_stack == 0
				       ? the_vm->root_activ_vector
				       : MAIN_VECTOR),
			    top.error_pc);
}

/**** read/write data base ****/

void
write_vm(vm the_vm)
{
    unsigned i;

    dbio_printf("%u %d %u %u\n",
		the_vm->top_activ_stack, the_vm->root_activ_vector,
		the_vm->func_id, the_vm->max_stack_size);

    for (i = 0; i <= the_vm->top_activ_stack; i++)
	write_activ(the_vm->activ_stack[i]);
}

vm
read_vm(int task_id)
{
    unsigned i, top, func_id, max;
    int vector;
    char c;
    vm the_vm;

    if (dbio_scanf("%u %d %u%c", &top, &vector, &func_id, &c) != 4
	|| (c == ' '
	    ? dbio_scanf("%u%c", &max, &c) != 2 || c != '\n'
	    : (max = DEFAULT_MAX_STACK_DEPTH, c != '\n'))) {
	errlog("READ_VM: Bad vm header\n");
	return 0;
    }
    the_vm = new_vm(task_id, top + 1);
    the_vm->max_stack_size = max;
    the_vm->top_activ_stack = top;
    the_vm->root_activ_vector = vector;
    the_vm->func_id = func_id;

    for (i = 0; i <= top; i++)
	if (!read_activ(&the_vm->activ_stack[i],
			i == 0 ? vector : MAIN_VECTOR)) {
	    errlog("READ_VM: Bad activ number %d\n", i);
	    return 0;
	}
    return the_vm;
}

char rcsid_eval_vm[] = "$Id$";

/* 
 * $Log$
 * Revision 1.4  2002/08/18 09:47:26  bjj
 * Finally made free_activation() take a pointer after noticing how !$%^&
 * much time it was taking in a particular profiling run.
 *
 * Revision 1.3  1998/12/14 13:17:46  nop
 * Merge UNSAFE_OPTS (ref fixups); fix Log tag placement to fit CVS whims
 *
 * Revision 1.2  1997/03/03 04:18:36  nop
 * GNU Indent normalization
 *
 * Revision 1.1.1.1  1997/03/03 03:44:59  nop
 * LambdaMOO 1.8.0p5
 *
 * Revision 2.2  1996/02/08  07:12:16  pavel
 * Renamed err/logf() to errlog/oklog().  Updated copyright notice for 1996.
 * Release 1.8.0beta1.
 *
 * Revision 2.1  1995/12/31  03:19:43  pavel
 * Added missing #include "options.h".  Release 1.8.0alpha4.
 *
 * Revision 2.0  1995/11/30  04:22:07  pavel
 * New baseline version, corresponding to release 1.8.0alpha1.
 *
 * Revision 1.10  1993/12/21  23:40:11  pavel
 * Add new `outcome' result from the interpreter.
 *
 * Revision 1.9  1993/08/11  06:03:12  pavel
 * Fixed mistaken %d->%u change.
 *
 * Revision 1.8  1993/08/11  02:58:03  pavel
 * Changed some bogus %d's to %u's in calls to *scanf() and *printf(), guided
 * by warnings from GCC...
 *
 * Revision 1.7  1992/10/23  23:03:47  pavel
 * Added copyright notice.
 *
 * Revision 1.6  1992/10/21  03:02:35  pavel
 * Converted to use new automatic configuration system.
 *
 * Revision 1.5  1992/10/17  20:25:59  pavel
 * Changed return-type of read_vm() from `char' to `int', for systems that use
 * unsigned chars.
 *
 * Revision 1.4  1992/09/25  21:12:12  pjames
 * Passed correct pc (error_pc) to get_lineno.
 *
 * Revision 1.3  1992/09/02  18:43:11  pavel
 * Added mechanism for resuming a read()ing task with an error.
 *
 * Revision 1.2  1992/08/31  22:22:24  pjames
 * Changed some `char *'s to `const char *'
 *
 * Revision 1.1  1992/08/10  16:20:00  pjames
 * Initial RCS-controlled version
 */