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| author | MarcoFalke <falke.marco@gmail.com> | 2020-10-03 10:54:28 +0200 |
|---|---|---|
| committer | MarcoFalke <falke.marco@gmail.com> | 2020-10-04 17:49:07 +0200 |
| commit | fae7a1c18803675e70b9bf66575e1e0a6e01f6f6 (patch) | |
| tree | 538acb915905380a857319bc834d6f631917d2d8 | |
| parent | 54fc96ffa70ad3a53d32709101b7a2ce064d822e (diff) | |
fuzz: Configure check for main function
| -rw-r--r-- | configure.ac | 14 | ||||
| -rw-r--r-- | src/test/fuzz/fuzz.cpp | 9 |
2 files changed, 14 insertions, 9 deletions
diff --git a/configure.ac b/configure.ac index fbf56443f1..674ed1ee73 100644 --- a/configure.ac +++ b/configure.ac @@ -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 diff --git a/src/test/fuzz/fuzz.cpp b/src/test/fuzz/fuzz.cpp index 1e1807d734..753cfffdcb 100644 --- a/src/test/fuzz/fuzz.cpp +++ b/src/test/fuzz/fuzz.cpp @@ -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) { |