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
|
/* Copyright (C) 2011 Matthew Fluet.
* Copyright (C) 1999-2008 Henry Cejtin, Matthew Fluet, Suresh
* Jagannathan, and Stephen Weeks.
* Copyright (C) 1997-2000 NEC Research Institute.
*
* MLton is released under a BSD-style license.
* See the file MLton-LICENSE for details.
*/
/* ---------------------------------------------------------------- */
/* Initialization */
/* ---------------------------------------------------------------- */
size_t sizeofIntInfFromString (GC_state s, const char *str) {
size_t slen = strlen (str);
/* A slight overestimate. */
double bytesPerChar = 0.415241011861 /* = ((log(10.0) / log(2.0)) / 8.0) */ ;
double bytes = ceil((double)slen * bytesPerChar);
return align (GC_ARRAY_HEADER_SIZE
+ sizeof(mp_limb_t) // for the sign
+ align((size_t)bytes, sizeof(mp_limb_t)),
s->alignment);
}
size_t sizeofInitialBytesLive (GC_state s) {
uint32_t i;
size_t dataBytes;
size_t total;
total = 0;
for (i = 0; i < s->intInfInitsLength; ++i) {
total += sizeofIntInfFromString (s, s->intInfInits[i].mlstr);
}
for (i = 0; i < s->vectorInitsLength; ++i) {
dataBytes =
s->vectorInits[i].bytesPerElement
* s->vectorInits[i].numElements;
total += align (GC_ARRAY_HEADER_SIZE
+ ((dataBytes < OBJPTR_SIZE)
? OBJPTR_SIZE
: dataBytes),
s->alignment);
}
return total;
}
void initIntInfs (GC_state s) {
struct GC_intInfInit *inits;
uint32_t i;
const char *str;
size_t bytes;
bool neg;
__mpz_struct resmpz;
__attribute__ ((unused)) int ans;
assert (isFrontierAligned (s, s->frontier));
for (i = 0; i < s->intInfInitsLength; i++) {
inits = &(s->intInfInits[i]);
assert (inits->globalIndex < s->globalsLength);
str = inits->mlstr;
bytes = sizeofIntInfFromString (s, str);
neg = *str == '~';
if (neg)
str++;
initIntInfRes (s, &resmpz, bytes);
ans = mpz_set_str (&resmpz, str, 10);
assert (ans == 0);
if (neg)
resmpz._mp_size = - resmpz._mp_size;
s->globals[inits->globalIndex] = finiIntInfRes (s, &resmpz, bytes);
}
assert (isFrontierAligned (s, s->frontier));
}
void initVectors (GC_state s) {
struct GC_vectorInit *inits;
pointer frontier;
uint32_t i;
assert (isFrontierAligned (s, s->frontier));
inits = s->vectorInits;
frontier = s->frontier;
for (i = 0; i < s->vectorInitsLength; i++) {
size_t bytesPerElement;
size_t dataBytes;
size_t objectSize;
uint32_t typeIndex;
bytesPerElement = inits[i].bytesPerElement;
dataBytes = bytesPerElement * inits[i].numElements;
objectSize = align (GC_ARRAY_HEADER_SIZE
+ ((dataBytes < OBJPTR_SIZE)
? OBJPTR_SIZE
: dataBytes),
s->alignment);
assert (objectSize <= (size_t)(s->heap.start + s->heap.size - frontier));
*((GC_arrayCounter*)(frontier)) = 0;
frontier = frontier + GC_ARRAY_COUNTER_SIZE;
*((GC_arrayLength*)(frontier)) = inits[i].numElements;
frontier = frontier + GC_ARRAY_LENGTH_SIZE;
switch (bytesPerElement) {
case 1:
typeIndex = WORD8_VECTOR_TYPE_INDEX;
break;
case 2:
typeIndex = WORD16_VECTOR_TYPE_INDEX;
break;
case 4:
typeIndex = WORD32_VECTOR_TYPE_INDEX;
break;
case 8:
typeIndex = WORD64_VECTOR_TYPE_INDEX;
break;
default:
die ("unknown bytes per element in vectorInit: %"PRIuMAX"",
(uintmax_t)bytesPerElement);
}
*((GC_header*)(frontier)) = buildHeaderFromTypeIndex (typeIndex);
frontier = frontier + GC_HEADER_SIZE;
s->globals[inits[i].globalIndex] = pointerToObjptr(frontier, s->heap.start);
if (DEBUG_DETAILED)
fprintf (stderr, "allocated vector at "FMTPTR"\n",
(uintptr_t)(s->globals[inits[i].globalIndex]));
memcpy (frontier, inits[i].bytes, dataBytes);
frontier += objectSize - GC_ARRAY_HEADER_SIZE;
}
if (DEBUG_DETAILED)
fprintf (stderr, "frontier after string allocation is "FMTPTR"\n",
(uintptr_t)frontier);
GC_profileAllocInc (s, (size_t)(frontier - s->frontier));
s->cumulativeStatistics.bytesAllocated += (size_t)(frontier - s->frontier);
assert (isFrontierAligned (s, frontier));
s->frontier = frontier;
}
void initWorld (GC_state s) {
uint32_t i;
pointer start;
GC_thread thread;
for (i = 0; i < s->globalsLength; ++i)
s->globals[i] = BOGUS_OBJPTR;
s->lastMajorStatistics.bytesLive = sizeofInitialBytesLive (s);
createHeap (s, &s->heap,
sizeofHeapDesired (s, s->lastMajorStatistics.bytesLive, 0),
s->lastMajorStatistics.bytesLive);
setCardMapAndCrossMap (s);
start = alignFrontier (s, s->heap.start);
s->frontier = start;
s->limitPlusSlop = s->heap.start + s->heap.size;
s->limit = s->limitPlusSlop - GC_HEAP_LIMIT_SLOP;
initIntInfs (s);
initVectors (s);
assert ((size_t)(s->frontier - start) <= s->lastMajorStatistics.bytesLive);
s->heap.oldGenSize = s->frontier - s->heap.start;
setGCStateCurrentHeap (s, 0, 0);
thread = newThread (s, sizeofStackInitialReserved (s));
switchToThread (s, pointerToObjptr((pointer)thread - offsetofThread (s), s->heap.start));
}
|
