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 template<typename MatrixType>
triggerMatrixBadAlloc(Index rows,Index cols)22 void triggerMatrixBadAlloc(Index rows, Index cols)
23 {
24 VERIFY_THROWS_BADALLOC( MatrixType m(rows, cols) );
25 VERIFY_THROWS_BADALLOC( MatrixType m; m.resize(rows, cols) );
26 VERIFY_THROWS_BADALLOC( MatrixType m; m.conservativeResize(rows, cols) );
27 }
28
29 template<typename VectorType>
triggerVectorBadAlloc(Index size)30 void triggerVectorBadAlloc(Index size)
31 {
32 VERIFY_THROWS_BADALLOC( VectorType v(size) );
33 VERIFY_THROWS_BADALLOC( VectorType v; v.resize(size) );
34 VERIFY_THROWS_BADALLOC( VectorType v; v.conservativeResize(size) );
35 }
36
test_sizeoverflow()37 void test_sizeoverflow()
38 {
39 // there are 2 levels of overflow checking. first in PlainObjectBase.h we check for overflow in rows*cols computations.
40 // this is tested in tests of the form times_itself_gives_0 * times_itself_gives_0
41 // Then in Memory.h we check for overflow in size * sizeof(T) computations.
42 // this is tested in tests of the form times_4_gives_0 * sizeof(float)
43
44 size_t times_itself_gives_0 = size_t(1) << (8 * sizeof(Index) / 2);
45 VERIFY(times_itself_gives_0 * times_itself_gives_0 == 0);
46
47 size_t times_4_gives_0 = size_t(1) << (8 * sizeof(Index) - 2);
48 VERIFY(times_4_gives_0 * 4 == 0);
49
50 size_t times_8_gives_0 = size_t(1) << (8 * sizeof(Index) - 3);
51 VERIFY(times_8_gives_0 * 8 == 0);
52
53 triggerMatrixBadAlloc<MatrixXf>(times_itself_gives_0, times_itself_gives_0);
54 triggerMatrixBadAlloc<MatrixXf>(times_itself_gives_0 / 4, times_itself_gives_0);
55 triggerMatrixBadAlloc<MatrixXf>(times_4_gives_0, 1);
56
57 triggerMatrixBadAlloc<MatrixXd>(times_itself_gives_0, times_itself_gives_0);
58 triggerMatrixBadAlloc<MatrixXd>(times_itself_gives_0 / 8, times_itself_gives_0);
59 triggerMatrixBadAlloc<MatrixXd>(times_8_gives_0, 1);
60
61 triggerVectorBadAlloc<VectorXf>(times_4_gives_0);
62
63 triggerVectorBadAlloc<VectorXd>(times_8_gives_0);
64 }
65