summaryrefslogtreecommitdiff
path: root/accel-pptpd/triton/mempool.c
blob: 0ba4ebea8dd4f59f9a3065c2b767cbdbbf0381b8 (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
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
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>

#include "triton_p.h"

#include "memdebug.h"

#define MAGIC1 0x2233445566778899llu

struct _mempool_t
{
	struct list_head entry;
	int size;
	struct list_head items;
#ifdef MEMDEBUG
	struct list_head ditems;
#endif
	spinlock_t lock;
	uint64_t magic;
};

struct _item_t
{
	struct _mempool_t *owner;
	struct list_head entry;
#ifdef MEMDEBUG
	const char *fname;
	int line;
#endif
	uint64_t magic2;
	uint64_t magic1;
	char ptr[0];
};

static LIST_HEAD(pools);
static spinlock_t pools_lock = SPINLOCK_INITIALIZER;

mempool_t __export *mempool_create(int size)
{
	struct _mempool_t *p = _malloc(sizeof(*p));

	memset(p, 0, sizeof(*p));
	INIT_LIST_HEAD(&p->items);
#ifdef MEMDEBUG
	INIT_LIST_HEAD(&p->ditems);
#endif
	spinlock_init(&p->lock);
	p->size = size;
	p->magic = (uint64_t)random() * (uint64_t)random();

	spin_lock(&pools_lock);
	list_add_tail(&p->entry, &pools);
	spin_unlock(&pools_lock);

	return (mempool_t *)p;
}

#ifndef MEMDEBUG
void __export *mempool_alloc(mempool_t *pool)
{
	struct _mempool_t *p = (struct _mempool_t *)pool;
	struct _item_t *it;
	uint32_t size = sizeof(*it) + p->size + 8;

	spin_lock(&p->lock);
	if (!list_empty(&p->items)) {
		it = list_entry(p->items.next, typeof(*it), entry);
		list_del(&it->entry);
		spin_unlock(&p->lock);
		
		__sync_fetch_and_sub(&triton_stat.mempool_available, size);
		
		it->magic1 = MAGIC1;

		return it->ptr;
	}
	spin_unlock(&p->lock);

	it = _malloc(size);
	if (!it) {
		triton_log_error("mempool: out of memory\n");
		return NULL;
	}
	it->owner = p;
	it->magic1 = MAGIC1;
	it->magic2 = p->magic;
	*(uint64_t*)(it->data + p->size) = it->magic2;

	__sync_fetch_and_add(&triton_stat.mempool_allocated, size);

	return it->ptr;
}
#endif

void __export *mempool_alloc_md(mempool_t *pool, const char *fname, int line)
{
	struct _mempool_t *p = (struct _mempool_t *)pool;
	struct _item_t *it;
	uint32_t size = sizeof(*it) + p->size + 8;

	spin_lock(&p->lock);
	if (!list_empty(&p->items)) {
		it = list_entry(p->items.next, typeof(*it), entry);
		list_del(&it->entry);
		list_add(&it->entry, &p->ditems);
		spin_unlock(&p->lock);

		it->fname = fname;
		it->line = line;
		
		__sync_fetch_and_sub(&triton_stat.mempool_available, size);
		
		it->magic1 = MAGIC1;

		return it->ptr;
	}
	spin_unlock(&p->lock);

	it = md_malloc(size, fname, line);
	if (!it) {
		triton_log_error("mempool: out of memory\n");
		return NULL;
	}
	it->owner = p;
	it->magic2 = p->magic;
	it->magic1 = MAGIC1;
	it->fname = fname;
	it->line = line;
	*(uint64_t*)(it->ptr + p->size) = it->magic2;

	spin_lock(&p->lock);
	list_add(&it->entry, &p->ditems);
	spin_unlock(&p->lock);

	__sync_fetch_and_add(&triton_stat.mempool_allocated, size);

	return it->ptr;
}


void __export mempool_free(void *ptr)
{
	struct _item_t *it = container_of(ptr, typeof(*it), ptr);
	uint32_t size = sizeof(*it) + it->owner->size + 8;

#ifdef MEMDEBUG
	if (it->magic1 != MAGIC1) {
		triton_log_error("mempool: memory corruption detected");
		abort();
	}

	if (it->magic2 != it->owner->magic) {
		triton_log_error("mempool: memory corruption detected");
		abort();
	}

	if (it->magic2 != *(uint64_t*)(it->ptr + it->owner->size)) {
		triton_log_error("mempool: memory corruption detected");
		abort();
	}

	it->magic1 = 0;
#endif

	spin_lock(&it->owner->lock);
#ifdef MEMDEBUG
	list_del(&it->entry);
#endif
	list_add_tail(&it->entry,&it->owner->items);
	spin_unlock(&it->owner->lock);

	__sync_fetch_and_add(&triton_stat.mempool_available, size);
}

void __export mempool_clean(mempool_t *pool)
{
	struct _mempool_t *p = (struct _mempool_t *)pool;
	struct _item_t *it;
	uint32_t size = sizeof(*it) + p->size + 8;

	spin_lock(&p->lock);
	while (!list_empty(&p->items)) {
		it = list_entry(p->items.next, typeof(*it), entry);
		list_del(&it->entry);
		_free(it);
		__sync_fetch_and_sub(&triton_stat.mempool_allocated, size);
		__sync_fetch_and_sub(&triton_stat.mempool_available, size);
	}
	spin_unlock(&p->lock);
}

#ifdef MEMDEBUG
void __export mempool_show(mempool_t *pool)
{
	struct _mempool_t *p = (struct _mempool_t *)pool;
	struct _item_t *it;

	spin_lock(&p->lock);
	list_for_each_entry(it, &p->ditems, entry)
		triton_log_error("%s:%i %p\n", it->fname, it->line, it->ptr);
	spin_unlock(&p->lock);
}
#endif

void sigclean(int num)
{
	struct _mempool_t *p;
	struct _item_t *it;
	uint32_t size;

	triton_log_error("mempool: clean\n");

	spin_lock(&pools_lock);
	list_for_each_entry(p, &pools, entry) {
		size = sizeof(*it) + p->size + 8;
		spin_lock(&p->lock);
		while (!list_empty(&p->items)) {
			it = list_entry(p->items.next, typeof(*it), entry);
			list_del(&it->entry);
			_free(it);
			__sync_fetch_and_sub(&triton_stat.mempool_allocated, size);
			__sync_fetch_and_sub(&triton_stat.mempool_available, size);
		}
		spin_unlock(&p->lock);
	}
	spin_unlock(&pools_lock);
}

static void __init init(void)
{
	sigset_t set;
	sigfillset(&set);
	
	struct sigaction sa = {
		.sa_handler = sigclean,
		.sa_mask = set,
	};

	sigaction(35, &sa, NULL);
}