mirror of https://github.com/bitcoin/bitcoin.git
43 lines
1.1 KiB
C++
43 lines
1.1 KiB
C++
// Copyright (c) 2019-2021 The Bitcoin Core developers
|
|
// Distributed under the MIT software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#include <boost/test/unit_test.hpp>
|
|
|
|
BOOST_AUTO_TEST_SUITE(compilerbug_tests)
|
|
|
|
#if defined(__GNUC__)
|
|
// This block will also be built under clang, which is fine (as it supports noinline)
|
|
void __attribute__ ((noinline)) set_one(unsigned char* ptr)
|
|
{
|
|
*ptr = 1;
|
|
}
|
|
|
|
int __attribute__ ((noinline)) check_zero(unsigned char const* in, unsigned int len)
|
|
{
|
|
for (unsigned int i = 0; i < len; ++i) {
|
|
if (in[i] != 0) return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
void set_one_on_stack() {
|
|
unsigned char buf[1];
|
|
set_one(buf);
|
|
}
|
|
|
|
BOOST_AUTO_TEST_CASE(gccbug_90348) {
|
|
// Test for GCC bug 90348. See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348
|
|
for (int i = 0; i <= 4; ++i) {
|
|
unsigned char in[4];
|
|
for (int j = 0; j < i; ++j) {
|
|
in[j] = 0;
|
|
set_one_on_stack(); // Apparently modifies in[0]
|
|
}
|
|
BOOST_CHECK(check_zero(in, i));
|
|
}
|
|
}
|
|
#endif
|
|
|
|
BOOST_AUTO_TEST_SUITE_END()
|