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Differential D6342 Diff 20867 src/compat/glibc_sanity.cpp

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src/compat/glibc_sanity.cpp

// Copyright (c) 2009-2014 The Bitcoin Core developers // Copyright (c) 2009-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying // Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php. // file COPYING or http://www.opensource.org/licenses/mit-license.php.
#if defined(HAVE_CONFIG_H) #if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h> #include <config/bitcoin-config.h>
#endif #endif
#include <cstddef> #include <cstddef>
#if defined(HAVE_SYS_SELECT_H)
#include <sys/select.h>
#endif
extern "C" void *memcpy(void *a, const void *b, size_t c); extern "C" void *memcpy(void *a, const void *b, size_t c);
void *memcpy_int(void *a, const void *b, size_t c) { void *memcpy_int(void *a, const void *b, size_t c) {
return memcpy(a, b, c); return memcpy(a, b, c);
} }
namespace { namespace {
// trigger: Use the memcpy_int wrapper which calls our internal memcpy. // trigger: Use the memcpy_int wrapper which calls our internal memcpy.
// A direct call to memcpy may be optimized away by the compiler. // A direct call to memcpy may be optimized away by the compiler.
Show All 11 Linestemplate <unsigned int T> bool sanity_test_memcpy() {
for (unsigned int i = 0; i != T; ++i) { for (unsigned int i = 0; i != T; ++i) {
if (memcpy_verify[i] != i) { if (memcpy_verify[i] != i) {
return false; return false;
} }
} }
return true; return true;
} }
#if defined(HAVE_SYS_SELECT_H)
// trigger: Call FD_SET to trigger __fdelt_chk. FORTIFY_SOURCE must be defined
// as >0 and optimizations must be set to at least -O2.
// test: Add a file descriptor to an empty fd_set. Verify that it has been
// correctly added.
bool sanity_test_fdelt() {
fd_set fds;
FD_ZERO(&fds);
FD_SET(0, &fds);
return FD_ISSET(0, &fds);
}
#endif
} // namespace } // namespace
bool glibc_sanity_test() { bool glibc_sanity_test() {
#if defined(HAVE_SYS_SELECT_H)
if (!sanity_test_fdelt()) {
return false;
}
#endif
return sanity_test_memcpy<1025>(); return sanity_test_memcpy<1025>();
} }