GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/file_chunk.cc
Date: 2025-06-22 02:36:02
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
23 200 unsigned FileChunkReflist::FindChunkIdx(const uint64_t off) {
24
2/4
✓ Branch 0 taken 200 times.
✗ Branch 1 not taken.
✓ Branch 3 taken 200 times.
✗ Branch 4 not taken.
 200 assert(list && (list->size() > 0));
25 200 unsigned idx_low = 0;
26 200 unsigned idx_high = list->size() - 1;
27 200 unsigned chunk_idx = idx_high / 2;
28
2/2
✓ Branch 0 taken 340 times.
✓ Branch 1 taken 160 times.
 500 while (idx_low < idx_high) {
29
2/2
✓ Branch 2 taken 60 times.
✓ Branch 3 taken 280 times.
 340 if (static_cast<uint64_t>(list->AtPtr(chunk_idx)->offset()) > off) {
30
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 60 times.
 60 assert(idx_high > 0);
31 60 idx_high = chunk_idx - 1;
32 } else {
33 280 if ((chunk_idx == list->size() - 1)
34
5/6
✓ Branch 0 taken 280 times.
✗ Branch 1 not taken.
✓ Branch 4 taken 40 times.
✓ Branch 5 taken 240 times.
✓ Branch 6 taken 40 times.
✓ Branch 7 taken 240 times.
 280 || (static_cast<uint64_t>(list->AtPtr(chunk_idx + 1)->offset())
35 > off)) {
36 40 break;
37 }
38 240 idx_low = chunk_idx + 1;
39 }
40 300 chunk_idx = idx_low + (idx_high - idx_low) / 2;
41 }
42 200 return chunk_idx;
43 }
44
45
46 /**
47 * Returns a consistent hash over hashes of the chunks. Used by libcvmfs.
48 */
49 20 shash::Any FileChunkReflist::HashChunkList() {
50 20 const shash::Algorithms algo = list->AtPtr(0)->content_hash().algorithm;
51
1/2
✓ Branch 1 taken 20 times.
✗ Branch 2 not taken.
 20 shash::ContextPtr ctx(algo);
52 20 ctx.buffer = alloca(ctx.size);
53
1/2
✓ Branch 1 taken 20 times.
✗ Branch 2 not taken.
 20 shash::Init(ctx);
54
2/2
✓ Branch 1 taken 40 times.
✓ Branch 2 taken 20 times.
 60 for (unsigned i = 0; i < list->size(); ++i) {
55 40 shash::Update(
56
1/2
✓ Branch 3 taken 40 times.
✗ Branch 4 not taken.
 40 list->AtPtr(i)->content_hash().digest, shash::kDigestSizes[algo], ctx);
57 }
58
1/2
✓ Branch 1 taken 20 times.
✗ Branch 2 not taken.
 20 shash::Any result(algo);
59
1/2
✓ Branch 1 taken 20 times.
✗ Branch 2 not taken.
 20 shash::Final(ctx, &result);
60 40 return result;
61 }
62
63
64 //------------------------------------------------------------------------------
65
66
67 781 void ChunkTables::InitLocks() {
68 781 lock = reinterpret_cast<pthread_mutex_t *>(smalloc(sizeof(pthread_mutex_t)));
69 781 const int retval = pthread_mutex_init(lock, NULL);
70
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 781 times.
 781 assert(retval == 0);
71
72
2/2
✓ Branch 0 taken 99968 times.
✓ Branch 1 taken 781 times.
 100749 for (unsigned i = 0; i < kNumHandleLocks; ++i) {
73 pthread_mutex_t *m = reinterpret_cast<pthread_mutex_t *>(
74 99968 smalloc(sizeof(pthread_mutex_t)));
75 99968 const int retval = pthread_mutex_init(m, NULL);
76
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 99968 times.
 99968 assert(retval == 0);
77
1/2
✓ Branch 1 taken 99968 times.
✗ Branch 2 not taken.
 99968 handle_locks.PushBack(m);
78 }
79 781 }
80
81
82 781 void ChunkTables::InitHashmaps() {
83 781 handle2uniqino.Init(16, 0, hasher_uint64t);
84 781 handle2fd.Init(16, 0, hasher_uint64t);
85 781 inode2chunks.Init(16, 0, hasher_uint64t);
86 781 inode2references.Init(16, 0, hasher_uint64t);
87 781 }
88
89
90
4/8
✓ Branch 2 taken 781 times.
✗ Branch 3 not taken.
✓ Branch 5 taken 781 times.
✗ Branch 6 not taken.
✓ Branch 8 taken 781 times.
✗ Branch 9 not taken.
✓ Branch 11 taken 781 times.
✗ Branch 12 not taken.
 781 ChunkTables::ChunkTables() {
91 781 next_handle = 2;
92 781 version = kVersion;
93
1/2
✓ Branch 1 taken 781 times.
✗ Branch 2 not taken.
 781 InitLocks();
94
1/2
✓ Branch 1 taken 781 times.
✗ Branch 2 not taken.
 781 InitHashmaps();
95 781 }
96
97
98 781 ChunkTables::~ChunkTables() {
99 781 pthread_mutex_destroy(lock);
100 781 free(lock);
101
2/2
✓ Branch 0 taken 99968 times.
✓ Branch 1 taken 781 times.
 100749 for (unsigned i = 0; i < kNumHandleLocks; ++i) {
102 99968 pthread_mutex_destroy(handle_locks.At(i));
103 99968 free(handle_locks.At(i));
104 }
105 781 }
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
151 353 SimpleChunkTables::SimpleChunkTables() {
152 353 lock_ = reinterpret_cast<pthread_mutex_t *>(smalloc(sizeof(pthread_mutex_t)));
153 353 const int retval = pthread_mutex_init(lock_, NULL);
154
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 353 times.
 353 assert(retval == 0);
155 353 }
156
157
158 351 SimpleChunkTables::~SimpleChunkTables() {
159
2/2
✓ Branch 1 taken 21 times.
✓ Branch 2 taken 351 times.
 372 for (unsigned i = 0; i < fd_table_.size(); ++i) {
160
1/2
✓ Branch 1 taken 21 times.
✗ Branch 2 not taken.
 21 delete fd_table_[i].chunk_reflist.list;
161 }
162 351 pthread_mutex_destroy(lock_);
163 351 free(lock_);
164 351 }
165
166
167 168 int SimpleChunkTables::Add(FileChunkReflist chunks) {
168
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 168 times.
 168 assert(chunks.list != NULL);
169
1/2
✓ Branch 1 taken 168 times.
✗ Branch 2 not taken.
 168 OpenChunks new_entry;
170
1/2
✓ Branch 1 taken 168 times.
✗ Branch 2 not taken.
 168 new_entry.chunk_reflist = chunks;
171
1/2
✓ Branch 1 taken 168 times.
✗ Branch 2 not taken.
 168 new_entry.chunk_fd = new ChunkFd();
172 168 unsigned i = 0;
173 168 Lock();
174
2/2
✓ Branch 1 taken 315 times.
✓ Branch 2 taken 147 times.
 462 for (; i < fd_table_.size(); ++i) {
175
2/2
✓ Branch 1 taken 21 times.
✓ Branch 2 taken 294 times.
 315 if (fd_table_[i].chunk_reflist.list == NULL) {
176
1/2
✓ Branch 2 taken 21 times.
✗ Branch 3 not taken.
 21 fd_table_[i] = new_entry;
177 21 Unlock();
178 21 return i;
179 }
180 }
181
1/2
✓ Branch 1 taken 147 times.
✗ Branch 2 not taken.
 147 fd_table_.push_back(new_entry);
182 147 Unlock();
183 147 return i;
184 168 }
185
186
187 63 SimpleChunkTables::OpenChunks SimpleChunkTables::Get(int fd) {
188 63 OpenChunks result;
189
2/2
✓ Branch 0 taken 21 times.
✓ Branch 1 taken 42 times.
 63 if (fd < 0)
190 21 return result;
191
192 42 const unsigned idx = static_cast<unsigned>(fd);
193 42 Lock();
194
2/2
✓ Branch 1 taken 21 times.
✓ Branch 2 taken 21 times.
 42 if (idx < fd_table_.size())
195
1/2
✓ Branch 2 taken 21 times.
✗ Branch 3 not taken.
 21 result = fd_table_[idx];
196 42 Unlock();
197 42 return result;
198 }
199
200
201 189 void SimpleChunkTables::Release(int fd) {
202
2/2
✓ Branch 0 taken 21 times.
✓ Branch 1 taken 168 times.
 189 if (fd < 0)
203 21 return;
204
205 168 Lock();
206 168 const unsigned idx = static_cast<unsigned>(fd);
207
2/2
✓ Branch 1 taken 21 times.
✓ Branch 2 taken 147 times.
 168 if (idx >= fd_table_.size()) {
208 21 Unlock();
209 21 return;
210 }
211
212
1/2
✓ Branch 1 taken 147 times.
✗ Branch 2 not taken.
 147 delete fd_table_[idx].chunk_reflist.list;
213 147 fd_table_[idx].chunk_reflist.list = NULL;
214 147 fd_table_[idx].chunk_reflist.path.Assign("", 0);
215
1/2
✓ Branch 1 taken 147 times.
✗ Branch 2 not taken.
 147 delete fd_table_[idx].chunk_fd;
216 147 fd_table_[idx].chunk_fd = NULL;
217
6/6
✓ Branch 1 taken 252 times.
✓ Branch 2 taken 21 times.
✓ Branch 4 taken 126 times.
✓ Branch 5 taken 126 times.
✓ Branch 6 taken 126 times.
✓ Branch 7 taken 147 times.
 273 while (!fd_table_.empty() && (fd_table_.back().chunk_reflist.list == NULL)) {
218 126 fd_table_.pop_back();
219 }
220 147 Unlock();
221 }
222