summaryrefslogtreecommitdiff
path: root/deps/v8/test/cctest/test-log-utils.cc
blob: c99d770d42a105d492d28e2580c9b094eed54fe5 (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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
// Copyright 2006-2009 the V8 project authors. All rights reserved.
//
// Tests of logging utilities from log-utils.h

#ifdef ENABLE_LOGGING_AND_PROFILING

#include "v8.h"

#include "log-utils.h"
#include "cctest.h"

using v8::internal::CStrVector;
using v8::internal::EmbeddedVector;
using v8::internal::LogDynamicBuffer;
using v8::internal::LogRecordCompressor;
using v8::internal::MutableCStrVector;
using v8::internal::ScopedVector;
using v8::internal::Vector;
using v8::internal::StrLength;

// Fills 'ref_buffer' with test data: a sequence of two-digit
// hex numbers: '0001020304...'. Then writes 'ref_buffer' contents to 'dynabuf'.
static void WriteData(LogDynamicBuffer* dynabuf, Vector<char>* ref_buffer) {
  static const char kHex[] = "0123456789ABCDEF";
  CHECK_GT(ref_buffer->length(), 0);
  CHECK_GT(513, ref_buffer->length());
  for (int i = 0, half_len = ref_buffer->length() >> 1; i < half_len; ++i) {
    (*ref_buffer)[i << 1] = kHex[i >> 4];
    (*ref_buffer)[(i << 1) + 1] = kHex[i & 15];
  }
  if (ref_buffer->length() & 1) {
    ref_buffer->last() = kHex[ref_buffer->length() >> 5];
  }
  CHECK_EQ(ref_buffer->length(),
           dynabuf->Write(ref_buffer->start(), ref_buffer->length()));
}


static int ReadData(
    LogDynamicBuffer* dynabuf, int start_pos, i::Vector<char>* buffer) {
  return dynabuf->Read(start_pos, buffer->start(), buffer->length());
}


// Helper function used by CHECK_EQ to compare Vectors. Templatized to
// accept both "char" and "const char" vector contents.
template <typename E, typename V>
static inline void CheckEqualsHelper(const char* file, int line,
                                     const char* expected_source,
                                     const Vector<E>& expected,
                                     const char* value_source,
                                     const Vector<V>& value) {
  if (expected.length() != value.length()) {
    V8_Fatal(file, line, "CHECK_EQ(%s, %s) failed\n"
             "#   Vectors lengths differ: %d expected, %d found\n"
             "#   Expected: %.*s\n"
             "#   Found: %.*s",
             expected_source, value_source,
             expected.length(), value.length(),
             expected.length(), expected.start(),
             value.length(), value.start());
  }
  if (strncmp(expected.start(), value.start(), expected.length()) != 0) {
    V8_Fatal(file, line, "CHECK_EQ(%s, %s) failed\n"
             "#   Vectors contents differ:\n"
             "#   Expected: %.*s\n"
             "#   Found: %.*s",
             expected_source, value_source,
             expected.length(), expected.start(),
             value.length(), value.start());
  }
}


TEST(DynaBufSingleBlock) {
  LogDynamicBuffer dynabuf(32, 32, "", 0);
  EmbeddedVector<char, 32> ref_buf;
  WriteData(&dynabuf, &ref_buf);
  EmbeddedVector<char, 32> buf;
  CHECK_EQ(32, dynabuf.Read(0, buf.start(), buf.length()));
  CHECK_EQ(32, ReadData(&dynabuf, 0, &buf));
  CHECK_EQ(ref_buf, buf);

  // Verify that we can't read and write past the end.
  CHECK_EQ(0, dynabuf.Read(32, buf.start(), buf.length()));
  CHECK_EQ(0, dynabuf.Write(buf.start(), buf.length()));
}


TEST(DynaBufCrossBlocks) {
  LogDynamicBuffer dynabuf(32, 128, "", 0);
  EmbeddedVector<char, 48> ref_buf;
  WriteData(&dynabuf, &ref_buf);
  CHECK_EQ(48, dynabuf.Write(ref_buf.start(), ref_buf.length()));
  // Verify that we can't write data when remaining buffer space isn't enough.
  CHECK_EQ(0, dynabuf.Write(ref_buf.start(), ref_buf.length()));
  EmbeddedVector<char, 48> buf;
  CHECK_EQ(48, ReadData(&dynabuf, 0, &buf));
  CHECK_EQ(ref_buf, buf);
  CHECK_EQ(48, ReadData(&dynabuf, 48, &buf));
  CHECK_EQ(ref_buf, buf);
  CHECK_EQ(0, ReadData(&dynabuf, 48 * 2, &buf));
}


TEST(DynaBufReadTruncation) {
  LogDynamicBuffer dynabuf(32, 128, "", 0);
  EmbeddedVector<char, 128> ref_buf;
  WriteData(&dynabuf, &ref_buf);
  EmbeddedVector<char, 128> buf;
  CHECK_EQ(128, ReadData(&dynabuf, 0, &buf));
  CHECK_EQ(ref_buf, buf);
  // Try to read near the end with a buffer larger than remaining data size.
  EmbeddedVector<char, 48> tail_buf;
  CHECK_EQ(32, ReadData(&dynabuf, 128 - 32, &tail_buf));
  CHECK_EQ(ref_buf.SubVector(128 - 32, 128), tail_buf.SubVector(0, 32));
}


TEST(DynaBufSealing) {
  const char* seal = "Sealed";
  const int seal_size = StrLength(seal);
  LogDynamicBuffer dynabuf(32, 128, seal, seal_size);
  EmbeddedVector<char, 100> ref_buf;
  WriteData(&dynabuf, &ref_buf);
  // Try to write data that will not fit in the buffer.
  CHECK_EQ(0, dynabuf.Write(ref_buf.start(), 128 - 100 - seal_size + 1));
  // Now the buffer is sealed, writing of any amount of data is forbidden.
  CHECK_EQ(0, dynabuf.Write(ref_buf.start(), 1));
  EmbeddedVector<char, 100> buf;
  CHECK_EQ(100, ReadData(&dynabuf, 0, &buf));
  CHECK_EQ(ref_buf, buf);
  // Check the seal.
  EmbeddedVector<char, 50> seal_buf;
  CHECK_EQ(seal_size, ReadData(&dynabuf, 100, &seal_buf));
  CHECK_EQ(CStrVector(seal), seal_buf.SubVector(0, seal_size));
  // Verify that there's no data beyond the seal.
  CHECK_EQ(0, ReadData(&dynabuf, 100 + seal_size, &buf));
}


TEST(CompressorStore) {
  LogRecordCompressor comp(2);
  const Vector<const char> empty = CStrVector("");
  CHECK(comp.Store(empty));
  CHECK(!comp.Store(empty));
  CHECK(!comp.Store(empty));
  const Vector<const char> aaa = CStrVector("aaa");
  CHECK(comp.Store(aaa));
  CHECK(!comp.Store(aaa));
  CHECK(!comp.Store(aaa));
  CHECK(comp.Store(empty));
  CHECK(!comp.Store(empty));
  CHECK(!comp.Store(empty));
}


void CheckCompression(LogRecordCompressor* comp,
                      const Vector<const char>& after) {
  EmbeddedVector<char, 100> result;
  CHECK(comp->RetrievePreviousCompressed(&result));
  CHECK_EQ(after, result);
}


void CheckCompression(LogRecordCompressor* comp,
                      const char* after) {
  CheckCompression(comp, CStrVector(after));
}


TEST(CompressorNonCompressed) {
  LogRecordCompressor comp(0);
  CHECK(!comp.RetrievePreviousCompressed(NULL));
  const Vector<const char> empty = CStrVector("");
  CHECK(comp.Store(empty));
  CHECK(!comp.RetrievePreviousCompressed(NULL));
  const Vector<const char> a_x_20 = CStrVector("aaaaaaaaaaaaaaaaaaaa");
  CHECK(comp.Store(a_x_20));
  CheckCompression(&comp, empty);
  CheckCompression(&comp, empty);
  CHECK(comp.Store(empty));
  CheckCompression(&comp, a_x_20);
  CheckCompression(&comp, a_x_20);
}


TEST(CompressorSingleLine) {
  LogRecordCompressor comp(1);
  const Vector<const char> string_1 = CStrVector("eee,ddd,ccc,bbb,aaa");
  CHECK(comp.Store(string_1));
  const Vector<const char> string_2 = CStrVector("fff,ddd,ccc,bbb,aaa");
  CHECK(comp.Store(string_2));
  // string_1 hasn't been compressed.
  CheckCompression(&comp, string_1);
  CheckCompression(&comp, string_1);
  const Vector<const char> string_3 = CStrVector("hhh,ggg,ccc,bbb,aaa");
  CHECK(comp.Store(string_3));
  // string_2 compressed using string_1.
  CheckCompression(&comp, "fff#1:3");
  CheckCompression(&comp, "fff#1:3");
  CHECK(!comp.Store(string_3));
  // Expecting no changes.
  CheckCompression(&comp, "fff#1:3");
  CHECK(!comp.Store(string_3));
  // Expecting no changes.
  CheckCompression(&comp, "fff#1:3");
  const Vector<const char> string_4 = CStrVector("iii,hhh,ggg,ccc,bbb,aaa");
  CHECK(comp.Store(string_4));
  // string_3 compressed using string_2.
  CheckCompression(&comp, "hhh,ggg#1:7");
  const Vector<const char> string_5 = CStrVector("nnn,mmm,lll,kkk,jjj");
  CHECK(comp.Store(string_5));
  // string_4 compressed using string_3.
  CheckCompression(&comp, "iii,#1");
  const Vector<const char> string_6 = CStrVector("nnn,mmmmmm,lll,kkk,jjj");
  CHECK(comp.Store(string_6));
  // string_5 hasn't been compressed.
  CheckCompression(&comp, string_5);
  CHECK(comp.Store(string_5));
  // string_6 compressed using string_5.
  CheckCompression(&comp, "nnn,mmm#1:4");
  const Vector<const char> string_7 = CStrVector("nnnnnn,mmm,lll,kkk,jjj");
  CHECK(comp.Store(string_7));
  // string_5 compressed using string_6.
  CheckCompression(&comp, "nnn,#1:7");
  const Vector<const char> string_8 = CStrVector("xxn,mmm,lll,kkk,jjj");
  CHECK(comp.Store(string_8));
  // string_7 compressed using string_5.
  CheckCompression(&comp, "nnn#1");
  const Vector<const char> string_9 =
      CStrVector("aaaaaaaaaaaaa,bbbbbbbbbbbbbbbbb");
  CHECK(comp.Store(string_9));
  // string_8 compressed using string_7.
  CheckCompression(&comp, "xx#1:5");
  const Vector<const char> string_10 =
      CStrVector("aaaaaaaaaaaaa,cccccccbbbbbbbbbb");
  CHECK(comp.Store(string_10));
  // string_9 hasn't been compressed.
  CheckCompression(&comp, string_9);
  CHECK(comp.Store(string_1));
  // string_10 compressed using string_9.
  CheckCompression(&comp, "aaaaaaaaaaaaa,ccccccc#1:21");
}



TEST(CompressorMultiLines) {
  const int kWindowSize = 3;
  LogRecordCompressor comp(kWindowSize);
  const Vector<const char> string_1 = CStrVector("eee,ddd,ccc,bbb,aaa");
  CHECK(comp.Store(string_1));
  const Vector<const char> string_2 = CStrVector("iii,hhh,ggg,fff,aaa");
  CHECK(comp.Store(string_2));
  const Vector<const char> string_3 = CStrVector("mmm,lll,kkk,jjj,aaa");
  CHECK(comp.Store(string_3));
  const Vector<const char> string_4 = CStrVector("nnn,hhh,ggg,fff,aaa");
  CHECK(comp.Store(string_4));
  const Vector<const char> string_5 = CStrVector("ooo,lll,kkk,jjj,aaa");
  CHECK(comp.Store(string_5));
  // string_4 compressed using string_2.
  CheckCompression(&comp, "nnn#2:3");
  CHECK(comp.Store(string_1));
  // string_5 compressed using string_3.
  CheckCompression(&comp, "ooo#2:3");
  CHECK(comp.Store(string_4));
  // string_1 is out of buffer by now, so it shouldn't be compressed.
  CHECK_GE(3, kWindowSize);
  CheckCompression(&comp, string_1);
  CHECK(comp.Store(string_2));
  // string_4 compressed using itself.
  CheckCompression(&comp, "#3");
}


TEST(CompressorBestSelection) {
  LogRecordCompressor comp(3);
  const Vector<const char> string_1 = CStrVector("eee,ddd,ccc,bbb,aaa");
  CHECK(comp.Store(string_1));
  const Vector<const char> string_2 = CStrVector("ddd,ccc,bbb,aaa");
  CHECK(comp.Store(string_2));
  const Vector<const char> string_3 = CStrVector("fff,eee,ddd,ccc,bbb,aaa");
  CHECK(comp.Store(string_3));
  // string_2 compressed using string_1.
  CheckCompression(&comp, "#1:4");
  const Vector<const char> string_4 = CStrVector("nnn,hhh,ggg,fff,aaa");
  CHECK(comp.Store(string_4));
  // Compressing string_3 using string_1 gives a better compression than
  // using string_2.
  CheckCompression(&comp, "fff,#2");
}


TEST(CompressorCompressibility) {
  LogRecordCompressor comp(2);
  const Vector<const char> string_1 = CStrVector("eee,ddd,ccc,bbb,aaa");
  CHECK(comp.Store(string_1));
  const Vector<const char> string_2 = CStrVector("ccc,bbb,aaa");
  CHECK(comp.Store(string_2));
  const Vector<const char> string_3 = CStrVector("aaa");
  CHECK(comp.Store(string_3));
  // string_2 compressed using string_1.
  CheckCompression(&comp, "#1:8");
  const Vector<const char> string_4 = CStrVector("xxx");
  CHECK(comp.Store(string_4));
  // string_3 can't be compressed using string_2 --- too short.
  CheckCompression(&comp, string_3);
}

#endif  // ENABLE_LOGGING_AND_PROFILING