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Merge #20065: fuzz: Configure check for main function
fae7a1c18803675e70b9bf66575e1e0a6e01f6f6 fuzz: Configure check for main function (MarcoFalke) Pull request description: Instead of the PP jungle, use a proper configure check Fixes https://github.com/google/honggfuzz/issues/336#issuecomment-702972138 ACKs for top commit: practicalswift: ACK fae7a1c18803675e70b9bf66575e1e0a6e01f6f6 Tree-SHA512: 2e55457d01f9ac598bb1e119d8b49dca55a28f88ec164cee6b5f071c29e9791f5a46cc8ee2b801b3a3faf906348da964ce32e7254da981c1104b9210a3508100
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configure.ac
14
configure.ac
@ -1244,6 +1244,20 @@ if test "x$enable_fuzz" = "xyes"; then
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use_upnp=no
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use_natpmp=no
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use_zmq=no
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AC_MSG_CHECKING([whether main function is needed])
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AX_CHECK_LINK_FLAG(
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[[-fsanitize=$use_sanitizers]],
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[AC_MSG_RESULT([no])],
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[AC_MSG_RESULT([yes])
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CPPFLAGS="$CPPFLAGS -DPROVIDE_MAIN_FUNCTION"],
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[],
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[AC_LANG_PROGRAM([[
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#include <cstdint>
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#include <cstddef>
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { return 0; }
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/* unterminated comment to remove the main function ...
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]],[[]])])
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else
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BITCOIN_QT_INIT
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@ -12,15 +12,6 @@
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const std::function<void(const std::string&)> G_TEST_LOG_FUN{};
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// Decide if main(...) should be provided:
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// * AFL needs main(...) regardless of platform.
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// * macOS handles __attribute__((weak)) main(...) poorly when linking
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// against libFuzzer. See https://github.com/bitcoin/bitcoin/pull/18008
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// for details.
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#if defined(__AFL_COMPILER) || !defined(MAC_OSX)
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#define PROVIDE_MAIN_FUNCTION
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#endif
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#if defined(PROVIDE_MAIN_FUNCTION)
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static bool read_stdin(std::vector<uint8_t>& data)
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{
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