exceptions.cpp revision 7faaa9f3f0df9d23790277834d426c3d992ac3ba 
1// This file is part of Eigen, a lightweight C++ template library
2// for linear algebra.
3//
4// Copyright (C) 2011 Gael Guennebaud <gael.guennebaud@inria.fr>
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
11// Various sanity tests with exceptions:
12//  - no memory leak when a custom scalar type trow an exceptions
13//  - todo: complete the list of tests!
14
15#define EIGEN_STACK_ALLOCATION_LIMIT 100000000
16
17#include "main.h"
18
19struct my_exception
20{
21  my_exception() {}
22  ~my_exception() {}
23};
24
25class ScalarWithExceptions
26{
27  public:
28    ScalarWithExceptions() { init(); }
29    ScalarWithExceptions(const float& _v) { init(); *v = _v; }
30    ScalarWithExceptions(const ScalarWithExceptions& other) { init(); *v = *(other.v); }
31    ~ScalarWithExceptions() {
32      delete v;
33      instances--;
34    }
35
36    void init() {
37      v = new float;
38      instances++;
39    }
40
41    ScalarWithExceptions operator+(const ScalarWithExceptions& other) const
42    {
43      countdown--;
44      if(countdown<=0)
45        throw my_exception();
46      return ScalarWithExceptions(*v+*other.v);
47    }
48
49    ScalarWithExceptions operator-(const ScalarWithExceptions& other) const
50    { return ScalarWithExceptions(*v-*other.v); }
51
52    ScalarWithExceptions operator*(const ScalarWithExceptions& other) const
53    { return ScalarWithExceptions((*v)*(*other.v)); }
54
55    ScalarWithExceptions& operator+=(const ScalarWithExceptions& other)
56    { *v+=*other.v; return *this; }
57    ScalarWithExceptions& operator-=(const ScalarWithExceptions& other)
58    { *v-=*other.v; return *this; }
59    ScalarWithExceptions& operator=(const ScalarWithExceptions& other)
60    { *v = *(other.v); return *this; }
61
62    bool operator==(const ScalarWithExceptions& other) const
63    { return *v==*other.v; }
64    bool operator!=(const ScalarWithExceptions& other) const
65    { return *v!=*other.v; }
66
67    float* v;
68    static int instances;
69    static int countdown;
70};
71
72ScalarWithExceptions real(const ScalarWithExceptions &x) { return x; }
73ScalarWithExceptions imag(const ScalarWithExceptions & ) { return 0; }
74ScalarWithExceptions conj(const ScalarWithExceptions &x) { return x; }
75
76int ScalarWithExceptions::instances = 0;
77int ScalarWithExceptions::countdown = 0;
78
79
80#define CHECK_MEMLEAK(OP) {                                 \
81    ScalarWithExceptions::countdown = 100;                  \
82    int before = ScalarWithExceptions::instances;           \
83    bool exception_thrown = false;                         \
84    try { OP; }                              \
85    catch (my_exception) {                                  \
86      exception_thrown = true;                              \
87      VERIFY(ScalarWithExceptions::instances==before && "memory leak detected in " && EIGEN_MAKESTRING(OP)); \
88    } \
89    VERIFY(exception_thrown && " no exception thrown in " && EIGEN_MAKESTRING(OP)); \
90  }
91
92void memoryleak()
93{
94  typedef Eigen::Matrix<ScalarWithExceptions,Dynamic,1> VectorType;
95  typedef Eigen::Matrix<ScalarWithExceptions,Dynamic,Dynamic> MatrixType;
96
97  {
98    int n = 50;
99    VectorType v0(n), v1(n);
100    MatrixType m0(n,n), m1(n,n), m2(n,n);
101    v0.setOnes(); v1.setOnes();
102    m0.setOnes(); m1.setOnes(); m2.setOnes();
103    CHECK_MEMLEAK(v0 = m0 * m1 * v1);
104    CHECK_MEMLEAK(m2 = m0 * m1 * m2);
105    CHECK_MEMLEAK((v0+v1).dot(v0+v1));
106  }
107  VERIFY(ScalarWithExceptions::instances==0 && "global memory leak detected in " && EIGEN_MAKESTRING(OP)); \
108}
109
110void test_exceptions()
111{
112  CALL_SUBTEST( memoryleak() );
113}
114