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69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
// Copyright (c) 2009-2014 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#if defined(HAVE_CONFIG_H)
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#include "config/bitcoin-config.h"
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#endif
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#include <cstddef>
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#if defined(HAVE_SYS_SELECT_H)
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#include <sys/select.h>
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#endif
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extern "C" void* memcpy(void* a, const void* b, size_t c);
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void* memcpy_int(void* a, const void* b, size_t c)
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{
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return memcpy(a, b, c);
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}
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namespace
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{
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// trigger: Use the memcpy_int wrapper which calls our internal memcpy.
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// A direct call to memcpy may be optimized away by the compiler.
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// test: Fill an array with a sequence of integers. memcpy to a new empty array.
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// Verify that the arrays are equal. Use an odd size to decrease the odds of
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// the call being optimized away.
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template <unsigned int T>
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bool sanity_test_memcpy()
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{
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unsigned int memcpy_test[T];
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unsigned int memcpy_verify[T] = {};
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for (unsigned int i = 0; i != T; ++i)
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memcpy_test[i] = i;
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memcpy_int(memcpy_verify, memcpy_test, sizeof(memcpy_test));
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for (unsigned int i = 0; i != T; ++i) {
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if (memcpy_verify[i] != i)
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return false;
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}
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return true;
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}
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#if defined(HAVE_SYS_SELECT_H)
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// trigger: Call FD_SET to trigger __fdelt_chk. FORTIFY_SOURCE must be defined
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// as >0 and optimizations must be set to at least -O2.
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// test: Add a file descriptor to an empty fd_set. Verify that it has been
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// correctly added.
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bool sanity_test_fdelt()
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{
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fd_set fds;
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FD_ZERO(&fds);
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FD_SET(0, &fds);
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return FD_ISSET(0, &fds);
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}
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#endif
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} // anon namespace
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bool glibc_sanity_test()
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{
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#if defined(HAVE_SYS_SELECT_H)
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if (!sanity_test_fdelt())
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return false;
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#endif
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return sanity_test_memcpy<1025>();
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}
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