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fuzz: Configure check for main function

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MarcoFalke 2020-10-03 10:54:28 +02:00
parent 54fc96ffa7
commit fae7a1c188
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2 changed files with 14 additions and 9 deletions
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14
configure.ac
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@ -1165,6 +1165,20 @@ if test "x$enable_fuzz" = "xyes"; then
use_bench=no
use_upnp=no
use_zmq=no
AC_MSG_CHECKING([whether main function is needed])
AX_CHECK_LINK_FLAG(
[[-fsanitize=$use_sanitizers]],
[AC_MSG_RESULT([no])],
[AC_MSG_RESULT([yes])
CPPFLAGS="$CPPFLAGS -DPROVIDE_MAIN_FUNCTION"],
[],
[AC_LANG_PROGRAM([[
#include <cstdint>
#include <cstddef>
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { return 0; }
/* unterminated comment to remove the main function ...
]],[[]])])
else
BITCOIN_QT_INIT

9
src/test/fuzz/fuzz.cpp
View File

@ -12,15 +12,6 @@
const std::function<void(const std::string&)> G_TEST_LOG_FUN{};
// Decide if main(...) should be provided:
// * AFL needs main(...) regardless of platform.
// * macOS handles __attribute__((weak)) main(...) poorly when linking
// against libFuzzer. See https://github.com/bitcoin/bitcoin/pull/18008
// for details.
#if defined(__AFL_COMPILER) || !defined(MAC_OSX)
#define PROVIDE_MAIN_FUNCTION
#endif
#if defined(PROVIDE_MAIN_FUNCTION)
static bool read_stdin(std::vector<uint8_t>& data)
{