1 /* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
2
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License, version 2.0,
5 as published by the Free Software Foundation.
6
7 This program is also distributed with certain software (including
8 but not limited to OpenSSL) that is licensed under separate terms,
9 as designated in a particular file or component or in included license
10 documentation. The authors of MySQL hereby grant you an additional
11 permission to link the program and your derivative works with the
12 separately licensed software that they have included with MySQL.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License, version 2.0, for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
22
23 #include "ArenaPool.hpp"
24 #include <ndbd_exit_codes.h>
25 #include <NdbOut.hpp>
26
27 static
28 Uint32
computeBlockSize(Uint32 blockSz,Uint32 wpp)29 computeBlockSize(Uint32 blockSz, Uint32 wpp)
30 {
31 Uint32 minspill = wpp % blockSz;
32 Uint32 minspill_bs = blockSz;
33
34 for (Uint32 i = 16; i<blockSz/4; i += 16)
35 {
36 Uint32 spillsz = wpp % (blockSz - i);
37 if (spillsz == 0)
38 {
39 return blockSz - i;
40 }
41 else if (spillsz < minspill)
42 {
43 minspill = spillsz;
44 minspill_bs = blockSz -i;
45 }
46 }
47 ndbout_c("blockSz: %u, wpp: %u -> %u (%u)",
48 blockSz, wpp, minspill_bs, minspill);
49 return minspill_bs;
50 }
51
52 void
init(Uint32 sz,Uint32 type_id,const Pool_context & pc)53 ArenaAllocator::init(Uint32 sz, Uint32 type_id, const Pool_context& pc)
54 {
55 Uint32 blocksz = ArenaBlock::computeBlockSizeInWords(sz);
56 Uint32 wpp = m_pool.WORDS_PER_PAGE;
57
58 Uint32 bs = computeBlockSize(blocksz, wpp);
59 Record_info ri;
60 ri.m_size = 4 * bs;
61 {
62 ArenaBlock tmp;
63 const char * off_base = (char*)&tmp;
64 const char * off_next = (char*)&tmp.nextPool;
65 const char * off_magic = (char*)&tmp.m_magic;
66
67 ri.m_offset_next_pool = Uint32(off_next - off_base);
68 ri.m_offset_magic = Uint32(off_magic - off_base);
69 }
70 ri.m_type_id = type_id;
71 m_pool.init(ri, pc);
72 m_block_size = bs - ArenaBlock::HeaderSize;
73 }
74
75 bool
seize(ArenaHead & ah)76 ArenaAllocator::seize(ArenaHead& ah)
77 {
78 Ptr<void> tmp;
79 if (m_pool.seize(tmp))
80 {
81 ah.m_first_block = tmp.i;
82 ah.m_current_block = tmp.i;
83 ah.m_block_size = m_block_size;
84 ah.m_current_block_ptr = static_cast<ArenaBlock*>(tmp.p);
85 ah.m_current_block_ptr->m_next_block = RNIL;
86 return true;
87 }
88 return false;
89 }
90
91 void
release(ArenaHead & ah)92 ArenaAllocator::release(ArenaHead& ah)
93 {
94 Ptr<void> curr;
95 curr.i = ah.m_first_block;
96 while (curr.i != RNIL)
97 {
98 curr.p = m_pool.getPtr(curr.i);
99 Uint32 next = static_cast<ArenaBlock*>(curr.p)->m_next_block;
100 m_pool.release(curr);
101 curr.i = next;
102 }
103
104 new (&ah) ArenaHead();
105 }
106
107 void
init(ArenaAllocator * alloc,const Record_info & ri,const Pool_context &)108 ArenaPool::init(ArenaAllocator * alloc,
109 const Record_info& ri, const Pool_context&)
110 {
111 m_record_info = ri;
112 #if SIZEOF_CHARP == 4
113 m_record_info.m_size = ((ri.m_size + 3) >> 2); // Align to word boundary
114 #else
115 m_record_info.m_size = ((ri.m_size + 7) >> 3) << 1; // align 8-byte
116 #endif
117 m_record_info.m_offset_magic = ((ri.m_offset_magic + 3) >> 2);
118 m_record_info.m_offset_next_pool = ((ri.m_offset_next_pool + 3) >> 2);
119 m_allocator = alloc;
120 }
121
122 bool
seize(ArenaHead & ah,Ptr<void> & ptr)123 ArenaPool::seize(ArenaHead & ah, Ptr<void>& ptr)
124 {
125 Uint32 pos = ah.m_first_free;
126 Uint32 bs = ah.m_block_size;
127 Uint32 ptrI = ah.m_current_block;
128 ArenaBlock * block = ah.m_current_block_ptr;
129
130 Uint32 sz = m_record_info.m_size;
131 Uint32 off = m_record_info.m_offset_magic;
132
133 if (0)
134 ndbout_c("pos: %u sz: %u (sum: %u) bs: %u",
135 pos, sz, (pos + sz), bs);
136
137 if (pos + sz <= bs)
138 {
139 /**
140 * Alloc in this block
141 */
142 ptr.i =
143 ((ptrI >> POOL_RECORD_BITS) << POOL_RECORD_BITS) +
144 (ptrI & POOL_RECORD_MASK) + pos + ArenaBlock::HeaderSize;
145 ptr.p = block->m_data + pos;
146 block->m_data[pos+off] = ~(Uint32)m_record_info.m_type_id;
147
148 ah.m_first_free = pos + sz;
149 return true;
150 }
151 else
152 {
153 Ptr<void> tmp;
154 if (m_allocator->m_pool.seize(tmp))
155 {
156 ah.m_first_free = 0;
157 ah.m_current_block = tmp.i;
158 ah.m_current_block_ptr->m_next_block = tmp.i;
159 ah.m_current_block_ptr = static_cast<ArenaBlock*>(tmp.p);
160 ah.m_current_block_ptr->m_next_block = RNIL;
161 bool ret = seize(ah, ptr);
162 (void)ret;
163 assert(ret == true);
164 return true;
165 }
166 }
167 return false;
168 }
169
170 void
handle_invalid_release(Ptr<void> ptr)171 ArenaPool::handle_invalid_release(Ptr<void> ptr)
172 {
173 char buf[255];
174
175 //Uint32 pos = ptr.i & POOL_RECORD_MASK;
176 //Uint32 pageI = ptr.i >> POOL_RECORD_BITS;
177 Uint32 * record_ptr_p = (Uint32*)ptr.p;
178
179 Uint32 magic = * (record_ptr_p + m_record_info.m_offset_magic);
180 BaseString::snprintf(buf, sizeof(buf),
181 "Invalid memory release: ptr (%x %p) magic: (%.8x %.8x)",
182 ptr.i, ptr.p, magic, m_record_info.m_type_id);
183
184 m_allocator->m_pool.m_ctx.handleAbort(NDBD_EXIT_PRGERR, buf);
185 }
186