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
21typedef DenseIndex Index;
22
23template<typename MatrixType>
24void 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
31template<typename VectorType>
32void 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
39void 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