65 lines
2.6 KiB
C++
65 lines
2.6 KiB
C++
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// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2011 Benoit Jacob <jacob.benoit.1@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#include "main.h"
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#define VERIFY_THROWS_BADALLOC(a) { \
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bool threw = false; \
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try { \
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a; \
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} \
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catch (std::bad_alloc&) { threw = true; } \
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VERIFY(threw && "should have thrown bad_alloc: " #a); \
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}
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template<typename MatrixType>
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void triggerMatrixBadAlloc(Index rows, Index cols)
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{
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VERIFY_THROWS_BADALLOC( MatrixType m(rows, cols) );
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VERIFY_THROWS_BADALLOC( MatrixType m; m.resize(rows, cols) );
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VERIFY_THROWS_BADALLOC( MatrixType m; m.conservativeResize(rows, cols) );
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}
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template<typename VectorType>
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void triggerVectorBadAlloc(Index size)
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{
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VERIFY_THROWS_BADALLOC( VectorType v(size) );
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VERIFY_THROWS_BADALLOC( VectorType v; v.resize(size) );
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VERIFY_THROWS_BADALLOC( VectorType v; v.conservativeResize(size) );
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}
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void test_sizeoverflow()
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{
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// there are 2 levels of overflow checking. first in PlainObjectBase.h we check for overflow in rows*cols computations.
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// this is tested in tests of the form times_itself_gives_0 * times_itself_gives_0
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// Then in Memory.h we check for overflow in size * sizeof(T) computations.
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// this is tested in tests of the form times_4_gives_0 * sizeof(float)
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size_t times_itself_gives_0 = size_t(1) << (8 * sizeof(Index) / 2);
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VERIFY(times_itself_gives_0 * times_itself_gives_0 == 0);
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size_t times_4_gives_0 = size_t(1) << (8 * sizeof(Index) - 2);
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VERIFY(times_4_gives_0 * 4 == 0);
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size_t times_8_gives_0 = size_t(1) << (8 * sizeof(Index) - 3);
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VERIFY(times_8_gives_0 * 8 == 0);
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triggerMatrixBadAlloc<MatrixXf>(times_itself_gives_0, times_itself_gives_0);
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triggerMatrixBadAlloc<MatrixXf>(times_itself_gives_0 / 4, times_itself_gives_0);
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triggerMatrixBadAlloc<MatrixXf>(times_4_gives_0, 1);
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triggerMatrixBadAlloc<MatrixXd>(times_itself_gives_0, times_itself_gives_0);
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triggerMatrixBadAlloc<MatrixXd>(times_itself_gives_0 / 8, times_itself_gives_0);
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triggerMatrixBadAlloc<MatrixXd>(times_8_gives_0, 1);
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triggerVectorBadAlloc<VectorXf>(times_4_gives_0);
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triggerVectorBadAlloc<VectorXd>(times_8_gives_0);
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}
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