diff options
| -rw-r--r-- | configure.ac | 4 | ||||
| -rw-r--r-- | src/Makefile.test.include | 1 | ||||
| -rw-r--r-- | src/test/compilerbug_tests.cpp | 43 |
3 files changed, 48 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 9cc01a4028..8449617085 100644 --- a/configure.ac +++ b/configure.ac @@ -693,6 +693,10 @@ if test x$TARGET_OS != xwindows; then AX_CHECK_COMPILE_FLAG([-fPIC],[PIC_FLAGS="-fPIC"]) fi +# All versions of gcc that we commonly use for building are subject to bug +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348. To work around that, set +# -fstack-reuse=none for all gcc builds. (Only gcc understands this flag) +AX_CHECK_COMPILE_FLAG([-fstack-reuse=none],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-reuse=none"]) if test x$use_hardening != xno; then use_hardening=yes AX_CHECK_COMPILE_FLAG([-Wstack-protector],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wstack-protector"]) diff --git a/src/Makefile.test.include b/src/Makefile.test.include index 1b6827d45a..65672f15e1 100644 --- a/src/Makefile.test.include +++ b/src/Makefile.test.include @@ -43,6 +43,7 @@ BITCOIN_TESTS =\ test/bswap_tests.cpp \ test/checkqueue_tests.cpp \ test/coins_tests.cpp \ + test/compilerbug_tests.cpp \ test/compress_tests.cpp \ test/crypto_tests.cpp \ test/cuckoocache_tests.cpp \ diff --git a/src/test/compilerbug_tests.cpp b/src/test/compilerbug_tests.cpp new file mode 100644 index 0000000000..701671314f --- /dev/null +++ b/src/test/compilerbug_tests.cpp @@ -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/test_bitcoin.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() |