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Merge #15985: Add test for GCC bug 90348

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58e291cfa Add test for GCC bug 90348 (Pieter Wuille)

Pull request description:

  This adds a test for GCC bug 90348 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348), using a test case extracted from our own `sha256d64` test in crypto_tests.cpp, which was failing on some platforms.

  This is based on top of #15983 to make sure the bug doesn't trigger (it does in some Travis configurations without it).

ACKs for commit 58e291:

Tree-SHA512: 4dc9084e92dd143a53930e42bb68e33d922a2a2b891406b259d3a0bed4511dcc49e7447a7a8e4eb793a26e3eacb188ca293b71e0e061f9b3230f8e7fcfd29525
This commit is contained in:
Wladimir J. van der Laan 2019-06-05 14:31:45 +02:00 committed by Munkybooty
parent 5d12f44d55
commit 8179bd5316
2 changed files with 44 additions and 0 deletions
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1
src/Makefile.test.include
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@ -132,6 +132,7 @@ BITCOIN_TESTS =\
test/cachemap_tests.cpp \ test/cachemap_tests.cpp \
test/cachemultimap_tests.cpp \ test/cachemultimap_tests.cpp \
test/coins_tests.cpp \ test/coins_tests.cpp \
test/compilerbug_tests.cpp \
test/compress_tests.cpp \ test/compress_tests.cpp \
test/crypto_tests.cpp \ test/crypto_tests.cpp \
test/cuckoocache_tests.cpp \ test/cuckoocache_tests.cpp \

43
src/test/compilerbug_tests.cpp Normal file
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@ -0,0 +1,43 @@
// 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 <test/setup_common.h>
#include <boost/test/unit_test.hpp>
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(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()