Skip to content
Navigation Menu
{{ message }}
forked from cppcheck-opensource/cppcheck
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathtestexceptionsafety.cpp
More file actions
416 lines (370 loc) · 14.2 KB
/
Copy pathtestexceptionsafety.cpp
File metadata and controls
416 lines (370 loc) · 14.2 KB
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
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2015 Daniel Marjamäki and Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "tokenize.h"
#include "checkexceptionsafety.h"
#include "testsuite.h"
#include <sstream>
extern std::ostringstream errout;
class TestExceptionSafety : public TestFixture {
public:
TestExceptionSafety() : TestFixture("TestExceptionSafety") {
}
private:
void run() {
TEST_CASE(destructors);
TEST_CASE(deallocThrow1);
TEST_CASE(deallocThrow2);
TEST_CASE(deallocThrow3);
TEST_CASE(rethrowCopy1);
TEST_CASE(rethrowCopy2);
TEST_CASE(rethrowCopy3);
TEST_CASE(rethrowCopy4);
TEST_CASE(rethrowCopy5);
TEST_CASE(catchExceptionByValue);
TEST_CASE(noexceptThrow);
TEST_CASE(nothrowThrow);
TEST_CASE(unhandledExceptionSpecification1); // #4800
TEST_CASE(unhandledExceptionSpecification2);
TEST_CASE(nothrowAttributeThrow);
TEST_CASE(nothrowAttributeThrow2); // #5703
TEST_CASE(nothrowDeclspecThrow);
}
void check(const char code[], bool inconclusive = false) {
// Clear the error buffer..
errout.str("");
Settings settings;
settings.addEnabled("all");
settings.inconclusive = inconclusive;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Check char variable usage..
CheckExceptionSafety checkExceptionSafety(&tokenizer, &settings, this);
checkExceptionSafety.runSimplifiedChecks(&tokenizer, &settings, this);
}
void destructors() {
check("class x {\n"
" ~x() {\n"
" throw e;\n"
" }\n"
"};");
ASSERT_EQUALS("[test.cpp:3]: (warning) Class x is not safe, destructor throws exception\n", errout.str());
check("class x {\n"
" ~x();\n"
"};\n"
"x::~x() {\n"
" throw e;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (warning) Class x is not safe, destructor throws exception\n", errout.str());
check("x::~x() {\n"
" throw e;\n"
"}");
TODO_ASSERT_EQUALS("[test.cpp:3]: (warning) Class x is not safe, destructor throws exception\n", "", errout.str());
// #3858 - throwing exception in try block in destructor.
check("class x {\n"
" ~x() {\n"
" try {\n"
" throw e;\n"
" } catch (...) {\n"
" }\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("class x {\n"
" ~x() {\n"
" if(!std::uncaught_exception()) {\n"
" throw e;\n"
" }\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void deallocThrow1() {
check("int * p;\n"
"void f(int x) {\n"
" delete p;\n"
" if (x)\n"
" throw 123;\n"
" p = 0;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (warning) Exception thrown in invalid state, 'p' points at deallocated memory.\n", errout.str());
check("void f() {\n"
" static int* p = foo;\n"
" delete p;\n"
" if (foo)\n"
" throw 1;\n"
" p = 0;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (warning) Exception thrown in invalid state, 'p' points at deallocated memory.\n", errout.str());
}
void deallocThrow2() {
check("void f() {\n"
" int* p = 0;\n"
" delete p;\n"
" if (foo)\n"
" throw 1;\n"
" p = new int;\n"
"}", true);
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" static int* p = 0;\n"
" delete p;\n"
" reset(p);\n"
" throw 1;\n"
"}", true);
ASSERT_EQUALS("", errout.str());
}
void deallocThrow3() {
check("void f() {\n"
" static int* p = 0;\n"
" delete p;\n"
" throw 1;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" static int* p = 0;\n"
" delete p;\n"
" throw 1;\n"
"}", true);
ASSERT_EQUALS("[test.cpp:4]: (warning) Exception thrown in invalid state, 'p' points at deallocated memory.\n", errout.str());
}
void rethrowCopy1() {
check("void f() {\n"
" try\n"
" {\n"
" foo();\n"
" }\n"
" catch(const exception& err)\n"
" {\n"
" throw err;\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:8]: (style) Throwing a copy of the caught exception instead of rethrowing the original exception.\n", errout.str());
}
void rethrowCopy2() {
check("void f() {\n"
" try\n"
" {\n"
" foo();\n"
" }\n"
" catch(exception& err)\n"
" {\n"
" throw err;\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:8]: (style) Throwing a copy of the caught exception instead of rethrowing the original exception.\n", errout.str());
}
void rethrowCopy3() {
check("void f() {\n"
" try {\n"
" foo();\n"
" }\n"
" catch(std::runtime_error& err) {\n"
" throw err;\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (style) Throwing a copy of the caught exception instead of rethrowing the original exception.\n", errout.str());
}
void rethrowCopy4() {
check("void f() {\n"
" try\n"
" {\n"
" foo();\n"
" }\n"
" catch(const exception& err)\n"
" {\n"
" exception err2;\n"
" throw err2;\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void rethrowCopy5() {
check("void f() {\n"
" try {\n"
" foo();\n"
" }\n"
" catch(const exception& outer) {\n"
" try {\n"
" foo(outer);\n"
" }\n"
" catch(const exception& inner) {\n"
" throw inner;\n"
" }\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (style) Throwing a copy of the caught exception instead of rethrowing the original exception.\n", errout.str());
check("void f() {\n"
" try {\n"
" foo();\n"
" }\n"
" catch(const exception& outer) {\n"
" try {\n"
" foo(outer);\n"
" }\n"
" catch(const exception& inner) {\n"
" throw outer;\n"
" }\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void catchExceptionByValue() {
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch( ::std::exception err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (style) Exception should be caught by reference.\n", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch(const exception err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (style) Exception should be caught by reference.\n", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch( ::std::exception& err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch(exception* err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch(const exception& err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch(int err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f() {\n"
" try {\n"
" bar();\n"
" }\n"
" catch(exception* const err) {\n"
" foo(err);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void noexceptThrow() {
check("void func1() noexcept(false) { throw 1; }\n"
"void func2() noexcept { throw 1; }\n"
"void func3() noexcept(true) { throw 1; }\n"
"void func4() noexcept(false) { throw 1; }\n"
"void func5() noexcept(true) { func1(); }\n"
"void func6() noexcept(false) { func1(); }\n");
ASSERT_EQUALS("[test.cpp:2]: (error) Exception thrown in function declared not to throw exceptions.\n"
"[test.cpp:3]: (error) Exception thrown in function declared not to throw exceptions.\n"
"[test.cpp:5]: (error) Exception thrown in function declared not to throw exceptions.\n", errout.str());
// avoid false positives
check("const char *func() noexcept { return 0; }\n");
ASSERT_EQUALS("", errout.str());
}
void nothrowThrow() {
check("void func1() throw(int) { throw 1; }\n"
"void func2() throw() { throw 1; }\n"
"void func3() throw(int) { throw 1; }\n"
"void func4() throw() { func1(); }\n"
"void func5() throw(int) { func1(); }\n");
ASSERT_EQUALS("[test.cpp:2]: (error) Exception thrown in function declared not to throw exceptions.\n"
"[test.cpp:4]: (error) Exception thrown in function declared not to throw exceptions.\n", errout.str());
// avoid false positives
check("const char *func() throw() { return 0; }\n");
ASSERT_EQUALS("", errout.str());
}
void unhandledExceptionSpecification1() { // #4800
check("void myThrowingFoo() throw(MyException) {\n"
" throw MyException();\n"
"}\n"
"void myNonCatchingFoo() {\n"
" myThrowingFoo();\n"
"}\n"
"void myCatchingFoo() {\n"
" try {\n"
" myThrowingFoo();\n"
" } catch(MyException &) {}\n"
"}\n", true);
ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:1]: (style, inconclusive) Unhandled exception specification when calling function myThrowingFoo().\n", errout.str());
}
void unhandledExceptionSpecification2() {
check("void f() const throw (std::runtime_error);\n"
"int main()\n"
"{\n"
" f();\n"
"}\n", true);
ASSERT_EQUALS("", errout.str());
}
void nothrowAttributeThrow() {
check("void func1() throw(int) { throw 1; }\n"
"void func2() __attribute((nothrow)); void func2() { throw 1; }\n"
"void func3() __attribute((nothrow)); void func3() { func1(); }\n");
ASSERT_EQUALS("[test.cpp:2]: (error) Exception thrown in function declared not to throw exceptions.\n"
"[test.cpp:3]: (error) Exception thrown in function declared not to throw exceptions.\n", errout.str());
// avoid false positives
check("const char *func() __attribute((nothrow)); void func1() { return 0; }\n");
ASSERT_EQUALS("", errout.str());
}
void nothrowAttributeThrow2() {
check("class foo {\n"
" void copyMemberValues() throw () {\n"
" copyMemberValues();\n"
" }\n"
"};\n");
ASSERT_EQUALS("", errout.str());
}
void nothrowDeclspecThrow() {
check("void func1() throw(int) { throw 1; }\n"
"void __declspec(nothrow) func2() { throw 1; }\n"
"void __declspec(nothrow) func3() { func1(); }\n");
ASSERT_EQUALS("[test.cpp:2]: (error) Exception thrown in function declared not to throw exceptions.\n"
"[test.cpp:3]: (error) Exception thrown in function declared not to throw exceptions.\n", errout.str());
// avoid false positives
check("const char *func() __attribute((nothrow)); void func1() { return 0; }\n");
ASSERT_EQUALS("", errout.str());
}
};
REGISTER_TEST(TestExceptionSafety)
You can’t perform that action at this time.