GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/file_chunk.cc
Date: 2025-10-19 02:35:28
Exec Total Coverage
Lines: 108 136 79.4%
Branches: 63 110 57.3%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 */
4
5
6 #include "file_chunk.h"
7
8 #include <cassert>
9
10 #include "util/murmur.hxx"
11 #include "util/platform.h"
12
13 using namespace std; // NOLINT
14
15 ✗ static inline uint32_t hasher_uint64t(const uint64_t &value) {
16 ✗ return MurmurHash2(&value, sizeof(value), 0x07387a4f);
17 }
18
19
20 //------------------------------------------------------------------------------
21
22
23 340 unsigned FileChunkReflist::FindChunkIdx(const uint64_t off) {
24
2/4
✓ Branch 0 taken 340 times.
✗ Branch 1 not taken.
✓ Branch 3 taken 340 times.
✗ Branch 4 not taken.
 340 assert(list && (list->size() > 0));
25 340 unsigned idx_low = 0;
26 340 unsigned idx_high = list->size() - 1;
27 340 unsigned chunk_idx = idx_high / 2;
28
2/2
✓ Branch 0 taken 578 times.
✓ Branch 1 taken 272 times.
 850 while (idx_low < idx_high) {
29
2/2
✓ Branch 2 taken 102 times.
✓ Branch 3 taken 476 times.
 578 if (static_cast<uint64_t>(list->AtPtr(chunk_idx)->offset()) > off) {
30
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 102 times.
 102 assert(idx_high > 0);
31 102 idx_high = chunk_idx - 1;
32 } else {
33 476 if ((chunk_idx == list->size() - 1)
34
5/6
✓ Branch 0 taken 476 times.
✗ Branch 1 not taken.
✓ Branch 4 taken 68 times.
✓ Branch 5 taken 408 times.
✓ Branch 6 taken 68 times.
✓ Branch 7 taken 408 times.
 476 || (static_cast<uint64_t>(list->AtPtr(chunk_idx + 1)->offset())
35 > off)) {
36 68 break;
37 }
38 408 idx_low = chunk_idx + 1;
39 }
40 510 chunk_idx = idx_low + (idx_high - idx_low) / 2;
41 }
42 340 return chunk_idx;
43 }
44
45
46 /**
47 * Returns a consistent hash over hashes of the chunks. Used by libcvmfs.
48 */
49 34 shash::Any FileChunkReflist::HashChunkList() {
50 34 const shash::Algorithms algo = list->AtPtr(0)->content_hash().algorithm;
51
1/2
✓ Branch 1 taken 34 times.
✗ Branch 2 not taken.
 34 shash::ContextPtr ctx(algo);
52 34 ctx.buffer = alloca(ctx.size);
53
1/2
✓ Branch 1 taken 34 times.
✗ Branch 2 not taken.
 34 shash::Init(ctx);
54
2/2
✓ Branch 1 taken 68 times.
✓ Branch 2 taken 34 times.
 102 for (unsigned i = 0; i < list->size(); ++i) {
55 68 shash::Update(
56
1/2
✓ Branch 3 taken 68 times.
✗ Branch 4 not taken.
 68 list->AtPtr(i)->content_hash().digest, shash::kDigestSizes[algo], ctx);
57 }
58
1/2
✓ Branch 1 taken 34 times.
✗ Branch 2 not taken.
 34 shash::Any result(algo);
59
1/2
✓ Branch 1 taken 34 times.
✗ Branch 2 not taken.
 34 shash::Final(ctx, &result);
60 68 return result;
61 }
62
63
64 //------------------------------------------------------------------------------
65
66
67 691 void ChunkTables::InitLocks() {
68 691 lock = reinterpret_cast<pthread_mutex_t *>(smalloc(sizeof(pthread_mutex_t)));
69 691 const int retval = pthread_mutex_init(lock, NULL);
70
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 691 times.
 691 assert(retval == 0);
71
72
2/2
✓ Branch 0 taken 88448 times.
✓ Branch 1 taken 691 times.
 89139 for (unsigned i = 0; i < kNumHandleLocks; ++i) {
73 pthread_mutex_t *m = reinterpret_cast<pthread_mutex_t *>(
74 88448 smalloc(sizeof(pthread_mutex_t)));
75 88448 const int retval = pthread_mutex_init(m, NULL);
76
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 88448 times.
 88448 assert(retval == 0);
77
1/2
✓ Branch 1 taken 88448 times.
✗ Branch 2 not taken.
 88448 handle_locks.PushBack(m);
78 }
79 691 }
80
81
82 691 void ChunkTables::InitHashmaps() {
83 691 handle2uniqino.Init(16, 0, hasher_uint64t);
84 691 handle2fd.Init(16, 0, hasher_uint64t);
85 691 inode2chunks.Init(16, 0, hasher_uint64t);
86 691 inode2references.Init(16, 0, hasher_uint64t);
87 691 }
88
89
90
4/8
✓ Branch 2 taken 691 times.
✗ Branch 3 not taken.
✓ Branch 5 taken 691 times.
✗ Branch 6 not taken.
✓ Branch 8 taken 691 times.
✗ Branch 9 not taken.
✓ Branch 11 taken 691 times.
✗ Branch 12 not taken.
 691 ChunkTables::ChunkTables() {
91 691 next_handle = 2;
92 691 version = kVersion;
93
1/2
✓ Branch 1 taken 691 times.
✗ Branch 2 not taken.
 691 InitLocks();
94
1/2
✓ Branch 1 taken 691 times.
✗ Branch 2 not taken.
 691 InitHashmaps();
95 691 }
96
97
98 691 ChunkTables::~ChunkTables() {
99 691 pthread_mutex_destroy(lock);
100 691 free(lock);
101
2/2
✓ Branch 0 taken 88448 times.
✓ Branch 1 taken 691 times.
 89139 for (unsigned i = 0; i < kNumHandleLocks; ++i) {
102 88448 pthread_mutex_destroy(handle_locks.At(i));
103 88448 free(handle_locks.At(i));
104 }
105 691 }
106
107
108 ✗ ChunkTables::ChunkTables(const ChunkTables &other) {
109 ✗ version = kVersion;
110 ✗ InitLocks();
111 ✗ InitHashmaps();
112 ✗ CopyFrom(other);
113 }
114
115
116 ✗ ChunkTables &ChunkTables::operator=(const ChunkTables &other) {
117 ✗ if (&other == this)
118 ✗ return *this;
119
120 ✗ handle2uniqino.Clear();
121 ✗ handle2fd.Clear();
122 ✗ inode2chunks.Clear();
123 ✗ inode2references.Clear();
124 ✗ CopyFrom(other);
125 ✗ return *this;
126 }
127
128
129 ✗ void ChunkTables::CopyFrom(const ChunkTables &other) {
130 ✗ assert(version == other.version);
131 ✗ next_handle = other.next_handle;
132 ✗ inode2references = other.inode2references;
133 ✗ inode2chunks = other.inode2chunks;
134 ✗ handle2fd = other.handle2fd;
135 ✗ handle2uniqino = other.handle2uniqino;
136 }
137
138
139 ✗ pthread_mutex_t *ChunkTables::Handle2Lock(const uint64_t handle) const {
140 ✗ const uint32_t hash = hasher_uint64t(handle);
141 ✗ const double bucket = static_cast<double>(hash)
142 ✗ * static_cast<double>(kNumHandleLocks)
143 / static_cast<double>((uint32_t)(-1));
144 ✗ return handle_locks.At((uint32_t)bucket % kNumHandleLocks);
145 }
146
147
148 //------------------------------------------------------------------------------
149
150
151 292 SimpleChunkTables::SimpleChunkTables() {
152 292 lock_ = reinterpret_cast<pthread_mutex_t *>(smalloc(sizeof(pthread_mutex_t)));
153 292 const int retval = pthread_mutex_init(lock_, NULL);
154
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 292 times.
 292 assert(retval == 0);
155 292 }
156
157
158 290 SimpleChunkTables::~SimpleChunkTables() {
159
2/2
✓ Branch 1 taken 35 times.
✓ Branch 2 taken 290 times.
 325 for (unsigned i = 0; i < fd_table_.size(); ++i) {
160
1/2
✓ Branch 1 taken 35 times.
✗ Branch 2 not taken.
 35 delete fd_table_[i].chunk_reflist.list;
161 }
162 290 pthread_mutex_destroy(lock_);
163 290 free(lock_);
164 290 }
165
166
167 280 int SimpleChunkTables::Add(FileChunkReflist chunks) {
168
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 280 times.
 280 assert(chunks.list != NULL);
169
1/2
✓ Branch 1 taken 280 times.
✗ Branch 2 not taken.
 280 OpenChunks new_entry;
170
1/2
✓ Branch 1 taken 280 times.
✗ Branch 2 not taken.
 280 new_entry.chunk_reflist = chunks;
171
1/2
✓ Branch 1 taken 280 times.
✗ Branch 2 not taken.
 280 new_entry.chunk_fd = new ChunkFd();
172 280 unsigned i = 0;
173 280 Lock();
174
2/2
✓ Branch 1 taken 525 times.
✓ Branch 2 taken 245 times.
 770 for (; i < fd_table_.size(); ++i) {
175
2/2
✓ Branch 1 taken 35 times.
✓ Branch 2 taken 490 times.
 525 if (fd_table_[i].chunk_reflist.list == NULL) {
176
1/2
✓ Branch 2 taken 35 times.
✗ Branch 3 not taken.
 35 fd_table_[i] = new_entry;
177 35 Unlock();
178 35 return i;
179 }
180 }
181
1/2
✓ Branch 1 taken 245 times.
✗ Branch 2 not taken.
 245 fd_table_.push_back(new_entry);
182 245 Unlock();
183 245 return i;
184 280 }
185
186
187 105 SimpleChunkTables::OpenChunks SimpleChunkTables::Get(int fd) {
188 105 OpenChunks result;
189
2/2
✓ Branch 0 taken 35 times.
✓ Branch 1 taken 70 times.
 105 if (fd < 0)
190 35 return result;
191
192 70 const unsigned idx = static_cast<unsigned>(fd);
193 70 Lock();
194
2/2
✓ Branch 1 taken 35 times.
✓ Branch 2 taken 35 times.
 70 if (idx < fd_table_.size())
195
1/2
✓ Branch 2 taken 35 times.
✗ Branch 3 not taken.
 35 result = fd_table_[idx];
196 70 Unlock();
197 70 return result;
198 }
199
200
201 315 void SimpleChunkTables::Release(int fd) {
202
2/2
✓ Branch 0 taken 35 times.
✓ Branch 1 taken 280 times.
 315 if (fd < 0)
203 35 return;
204
205 280 Lock();
206 280 const unsigned idx = static_cast<unsigned>(fd);
207
2/2
✓ Branch 1 taken 35 times.
✓ Branch 2 taken 245 times.
 280 if (idx >= fd_table_.size()) {
208 35 Unlock();
209 35 return;
210 }
211
212
1/2
✓ Branch 1 taken 245 times.
✗ Branch 2 not taken.
 245 delete fd_table_[idx].chunk_reflist.list;
213 245 fd_table_[idx].chunk_reflist.list = NULL;
214 245 fd_table_[idx].chunk_reflist.path.Assign("", 0);
215
1/2
✓ Branch 1 taken 245 times.
✗ Branch 2 not taken.
 245 delete fd_table_[idx].chunk_fd;
216 245 fd_table_[idx].chunk_fd = NULL;
217
6/6
✓ Branch 1 taken 420 times.
✓ Branch 2 taken 35 times.
✓ Branch 4 taken 210 times.
✓ Branch 5 taken 210 times.
✓ Branch 6 taken 210 times.
✓ Branch 7 taken 245 times.
 455 while (!fd_table_.empty() && (fd_table_.back().chunk_reflist.list == NULL)) {
218 210 fd_table_.pop_back();
219 }
220 245 Unlock();
221 }
222