无法使用clang和libc ++链接libFuzzer.a [英] Can't link libFuzzer.a using clang with libc++

问题描述

我正在尝试链接在一起：

I'm trying to link together:

• libFuzzer.a，使用clang ++-5.0和-编译std = c ++ 11


• 我的模糊驱动程序，使用clang ++-5.0和 -std = c ++ 11 -stdlib =编译libc ++


• libcurl，使用clang-5.0编译

，此链接器命令正在执行：

Specifically, this linker command is being executed:

/ bin / bash ../../libtool --silent --tag = CXX- -mode = link clang ++-5.0 -I ../../ include -I ../../ lib -I ../../ lib -I ../../ tests / fuzz -fsanitize = address- fsanitize地址使用后范围-fsanitize-coverage = trace-pc-guard，trace-cmp -std = c ++ 11 -stdlib = libc ++ -o curl_fuzzer curl_fuzzer-curl_fuzzer.o ../../lib/ libcurl.la /root/checkouts/Fuzzer/libFuzzer.a -lssh2 -lssl -lcrypto -lssl -lcrypto -lz -lpthread -lm

/bin/bash ../../libtool --silent --tag=CXX --mode=link clang++-5.0 -I../../include -I../../lib -I../../lib -I../../tests/fuzz -fsanitize=address -fsanitize-address-use-after-scope -fsanitize-coverage=trace-pc-guard,trace-cmp -std=c++11 -stdlib=libc++ -o curl_fuzzer curl_fuzzer-curl_fuzzer.o ../../lib/libcurl.la /root/checkouts/Fuzzer/libFuzzer.a -lssh2 -lssl -lcrypto -lssl -lcrypto -lz -lpthread -lm

执行此命令将输出以下内容：

Executing this command outputs the following:

/bin/bash ../../libtool --silent --tag=CXX   --mode=link clang++-5.0 -I../../include -I../../lib -I../../lib -I../../tests/fuzz -fsanitize=address -fsanitize-address-use-after-scope -fsanitize-coverage=trace-pc-guard,trace-cmp -std=c++11 -stdlib=libc++   -o curl_fuzzer curl_fuzzer-curl_fuzzer.o ../../lib/libcurl.la /root/checkouts/Fuzzer/libFuzzer.a  -lssh2 -lssl -lcrypto -lssl -lcrypto -lz -lpthread -lm > /tmp/cat.txt 2>&1; head -20 /tmp/cat.txt
/root/checkouts/Fuzzer/libFuzzer.a(FuzzerIO.o): In function `fuzzer::FileToVector(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned long, bool)':
/root/checkouts/Fuzzer/./FuzzerIO.cpp:34: undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::basic_ifstream(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::_Ios_Openmode)'
/root/checkouts/Fuzzer/./FuzzerIO.cpp:40: undefined reference to `std::istream::seekg(long, std::_Ios_Seekdir)'
/root/checkouts/Fuzzer/./FuzzerIO.cpp:41: undefined reference to `std::istream::tellg()'
/root/checkouts/Fuzzer/./FuzzerIO.cpp:47: undefined reference to `std::istream::seekg(long, std::_Ios_Seekdir)'
/root/checkouts/Fuzzer/./FuzzerIO.cpp:49: undefined reference to `std::istream::read(char*, long)'
/root/checkouts/Fuzzer/libFuzzer.a(FuzzerIO.o): In function `~basic_ifstream':
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/fstream:534: undefined reference to `VTT for std::basic_ifstream<char, std::char_traits<char> >'
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/fstream:534: undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::~basic_ifstream()'
/root/checkouts/Fuzzer/libFuzzer.a(FuzzerIO.o): In function `~basic_ios':
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/bits/basic_ios.h:282: undefined reference to `std::ios_base::~ios_base()'
/root/checkouts/Fuzzer/libFuzzer.a(FuzzerIO.o): In function `~basic_ifstream':
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/fstream:534: undefined reference to `VTT for std::basic_ifstream<char, std::char_traits<char> >'
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/fstream:534: undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::~basic_ifstream()'
/root/checkouts/Fuzzer/libFuzzer.a(FuzzerIO.o): In function `~basic_ios':
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/bits/basic_ios.h:282: undefined reference to `std::ios_base::~ios_base()'
/root/checkouts/Fuzzer/libFuzzer.a(FuzzerIO.o): In function `fuzzer::FileToString(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
/root/checkouts/Fuzzer/./FuzzerIO.cpp:54: undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::basic_ifstream(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::_Ios_Openmode)'
/root/checkouts/Fuzzer/libFuzzer.a(FuzzerIO.o): In function `~basic_ifstream':
/usr/bin/../lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/fstream:534: undefined reference to `VTT for std::basic_ifstream<char, std::char_traits<char> >'
<snip>

我尝试执行以下操作来解决此问题：

I've tried doing the following to fix this:

• 添加 -lc ++ -不执行任何操作


• 添加 -lc ++ abi -什么也没做

• Adding -lc++ - doesn't do anything
• Adding -lc++abi - doesn't do anything

感觉好像我丢失了显而易见的东西，但我不确定......

It feels like I'm missing something obvious but I'm not sure what...

我安装的clang-5.0来自 clang-5.0 / kali-rolling 。

My installation of clang-5.0 comes from clang-5.0/kali-rolling.

推荐答案

您已经使用libstdc ++编译了部分代码，并使用libc ++编译了部分代码。当您将它们链接在一起（使用libc ++）时，引用libstdc ++的部分将无法解析。

You have compiled part of your code with libstdc++ and part with libc++. When you link them together (using libc++), the parts that have references to libstdc++ don't get resolved.

例如， std :: __cxx11 :: basic_string 绝对是libstdc ++符号。

For example, std::__cxx11::basic_string is definitely a libstdc++ symbol.

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