1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2011 Benoit Jacob <jacob.benoit.1@gmail.com>
5 //
6 // This Source Code Form is subject to the terms of the Mozilla
7 // Public License v. 2.0. If a copy of the MPL was not distributed
8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9
10 #include "main.h"
11
12 #define VERIFY_THROWS_BADALLOC(a) { \
13 bool threw = false; \
14 try { \
15 a; \
16 } \
17 catch (std::bad_alloc&) { threw = true; } \
18 VERIFY(threw && "should have thrown bad_alloc: " #a); \
19 }
20
21 typedef DenseIndex Index;
22
23 template<typename MatrixType>
triggerMatrixBadAlloc(Index rows,Index cols)24 void triggerMatrixBadAlloc(Index rows, Index cols)
25 {
26 VERIFY_THROWS_BADALLOC( MatrixType m(rows, cols) );
27 VERIFY_THROWS_BADALLOC( MatrixType m; m.resize(rows, cols) );
28 VERIFY_THROWS_BADALLOC( MatrixType m; m.conservativeResize(rows, cols) );
29 }
30
31 template<typename VectorType>
triggerVectorBadAlloc(Index size)32 void triggerVectorBadAlloc(Index size)
33 {
34 VERIFY_THROWS_BADALLOC( VectorType v(size) );
35 VERIFY_THROWS_BADALLOC( VectorType v; v.resize(size) );
36 VERIFY_THROWS_BADALLOC( VectorType v; v.conservativeResize(size) );
37 }
38
test_sizeoverflow()39 void test_sizeoverflow()
40 {
41 // there are 2 levels of overflow checking. first in PlainObjectBase.h we check for overflow in rows*cols computations.
42 // this is tested in tests of the form times_itself_gives_0 * times_itself_gives_0
43 // Then in Memory.h we check for overflow in size * sizeof(T) computations.
44 // this is tested in tests of the form times_4_gives_0 * sizeof(float)
45
46 size_t times_itself_gives_0 = size_t(1) << (8 * sizeof(Index) / 2);
47 VERIFY(times_itself_gives_0 * times_itself_gives_0 == 0);
48
49 size_t times_4_gives_0 = size_t(1) << (8 * sizeof(Index) - 2);
50 VERIFY(times_4_gives_0 * 4 == 0);
51
52 size_t times_8_gives_0 = size_t(1) << (8 * sizeof(Index) - 3);
53 VERIFY(times_8_gives_0 * 8 == 0);
54
55 triggerMatrixBadAlloc<MatrixXf>(times_itself_gives_0, times_itself_gives_0);
56 triggerMatrixBadAlloc<MatrixXf>(times_itself_gives_0 / 4, times_itself_gives_0);
57 triggerMatrixBadAlloc<MatrixXf>(times_4_gives_0, 1);
58
59 triggerMatrixBadAlloc<MatrixXd>(times_itself_gives_0, times_itself_gives_0);
60 triggerMatrixBadAlloc<MatrixXd>(times_itself_gives_0 / 8, times_itself_gives_0);
61 triggerMatrixBadAlloc<MatrixXd>(times_8_gives_0, 1);
62
63 triggerVectorBadAlloc<VectorXf>(times_4_gives_0);
64
65 triggerVectorBadAlloc<VectorXd>(times_8_gives_0);
66 }
67