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src/test/compilerbug_tests.cpp
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// Copyright (c) 2019 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> | |||||
#include <test/setup_common.h> | |||||
BOOST_FIXTURE_TEST_SUITE(compilerbug_tests, BasicTestingSetup) | |||||
#if defined(__GNUC__) | |||||
// This block will also be built under clang, which is fine (as it supports | |||||
// noinline) | |||||
void __attribute__((noinline)) set_one(uint8_t *ptr) { | |||||
*ptr = 1; | |||||
} | |||||
int __attribute__((noinline)) check_zero(uint8_t 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() { | |||||
uint8_t 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) { | |||||
uint8_t 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() |