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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
// === Auto-generated preamble library stuff ===
function __globalConstructor__() {
}
var __THREW__ = false; // Used in checking for thrown exceptions.
var __ATEXIT__ = [];
var HEAP = [];
var HEAPTOP = 0;
#if SAFE_HEAP
// Semi-manual memory corruption debugging
HEAP_WATCHED = {};
function SAFE_HEAP_STORE(dest, value) {
if (dest in HEAP_WATCHED) {
print((new Error()).stack);
throw "Bad store!" + dest;
}
HEAP[dest] = value;
}
function __Z16PROTECT_HEAPADDRPv(dest) {
HEAP_WATCHED[dest] = true;
}
function __Z18UNPROTECT_HEAPADDRPv(dest) {
delete HEAP_WATCHED[dest];
}
//==========================================
#endif
#if LABEL_DEBUG
INDENT = '';
#endif
function abort(text) {
text = "ABORT: " + text;
print(text + "\n");
// print((new Error).stack); // for stack traces
print("\n");
throw text;
}
function Pointer_niceify(ptr) {
// XXX hardcoded ptr impl
return { slab: HEAP, pos: ptr };
// if (!ptr.slab)
// return { slab: ptr[0], pos: ptr[1] };
// else
// return ptr;
}
function Pointer_make(slab, pos) {
pos = pos ? pos : 0;
// XXX hardcoded ptr impl
if (slab === HEAP) return pos;
// Flatten out - needed for global consts/vars
function flatten(slab) {
if (!slab || slab.length === undefined || typeof slab === 'function') return [slab];
return slab.map(flatten).reduce(function(a,b) { return a.concat(b) }, []);
}
var slab = flatten(slab);
// Finalize
var ret = _malloc(Math.max(slab.length - pos, 1));
for (var i = 0; i < slab.length - pos; i++) {
#if SAFE_HEAP
SAFE_HEAP_STORE(ret + i, slab[pos + i]);
#else
HEAP[ret + i] = slab[pos + i];
#endif
}
return ret;
// return { slab: slab, pos: pos ? pos : 0 };
}
function Pointer_stringify(ptr) {
ptr = Pointer_niceify(ptr);
var ret = "";
var i = 0;
var t;
while (1) {
// if ((ptr.pos + i) >= ptr.slab.length) { return "<< Invalid read: " + (ptr.pos+i) + " : " + ptr.slab.length + " >>"; } else {}
if ((ptr.pos+i) >= ptr.slab.length) { break; } else {}
t = String.fromCharCode(ptr.slab[ptr.pos + i]);
if (t == "\0") { break; } else {}
ret = ret + t;
i = i + 1;
}
return ret;
}
function _malloc(size) {
// XXX hardcoded ptr impl
var ret = HEAPTOP;
HEAPTOP += size;
return ret;
// We don't actually do new Array(size) - memory is uninitialized anyhow
// return Pointer_make([]);
}
__Znwj = _malloc; // Mangled "new"
__Znaj = _malloc; // Mangled "new"
function _free(ptr) {
// XXX hardcoded ptr impl
// XXX TODO - actual implementation! Currently we leak it all
// Nothing needs to be done! But we mark the pointer
// as invalid. Note that we should do it for all other
// pointers of this slab too.
// ptr.slab = null;
// ptr[0] = null;
}
__ZdlPv = _free; // Mangled "delete"
__ZdaPv = _free; // Mangled "delete"
// stdio.h
// C-style: we work on ints on the HEAP.
function __formatString() {
var textIndex = arguments[0];
var argIndex = 1;
var ret = [];
var curr = -1;
while (curr != 0) {
curr = HEAP[textIndex];
next = HEAP[textIndex+1];
if (curr == '%'.charCodeAt(0) && ['d', 'f'].indexOf(String.fromCharCode(next)) != -1) {
String(arguments[argIndex]).split('').forEach(function(chr) {
ret.push(chr.charCodeAt(0));
});
argIndex += 1;
textIndex += 2;
} else if (curr == '%'.charCodeAt(0) && next == 's'.charCodeAt(0)) {
ret = ret.concat(String_copy(arguments[argIndex]));
argIndex += 1;
textIndex += 2;
} else {
ret.push(curr);
textIndex ++;
}
}
return Pointer_make(ret);
}
function _printf() {
var text = __formatString.apply(null, arguments);
print(Pointer_stringify(text));
}
function _puts(p) {
_printf(p);
// print("\n"); // XXX print already always adds one
}
function _putchar(p) {
print(String.fromCharCode(p));
}
function _strlen(p) {
// XXX hardcoded ptr impl
var q = p;
while (HEAP[q] != 0) q++;
return q - p;
// p = Pointer_niceify(p);
// return p.slab.length; // XXX might want to find the null terminator...
}
function String_copy(p, addZero) {
// XXX hardcoded ptr impl
return HEAP.slice(p, p+_strlen(p)).concat(addZero ? [0] : []);
}
// stdlib.h
// Get a pointer, return int value of the string it points to
function _atoi(s) {
return Math.floor(Number(Pointer_stringify(s)));
}
function _llvm_memcpy_i32(dest, src, num, idunno) {
// XXX hardcoded ptr impl
for (var i = 0; i < num; i++) {
#if SAFE_HEAP
SAFE_HEAP_STORE(dest + i, HEAP[src + i]);
#else
HEAP[dest + i] = HEAP[src + i];
#endif
}
// dest = Pointer_niceify(dest);
// src = Pointer_niceify(src);
// dest.slab = src.slab.slice(src.pos);
}
// Tools
// println((new Error).stack); // for stack traces
function println(text) {
print(text);// + "\n"); // XXX print already always adds one
}
function jrint(label, obj) {
if (!obj) {
obj = label;
label = '';
} else
label = label + ' : ';
print(label + JSON.stringify(obj));
}
function intArrayFromString(stringy) {
var ret = [];
var t;
var i = 0;
while (i < stringy.length) {
ret.push(stringy.charCodeAt(i));
i = i + 1;
}
ret.push(0);
return ret;
}
// === Body ===
|
