有地址消毒液的clang 32位

Question

我正在用nix构建一个可复制的构建环境。代码是在32位模式下用clang-10构建的。而且它和ASAN有联系。

clang a.c -m32 -fsanitize=leak

我正在使用pkgsi686Linux.clang_10包在shell.nix中

这就是我所犯的错误：

/nix/store/4c4fy3hs558qm0ykif24f200d8mvcrkb-binutils-2.35.1/bin/ld:找不到/nix/store/h4h6h98m32xcp18vcbd2mx5rfd34bmw1-clang-wrapper-10.0.1/resource-root/lib/linux/libclang_rt.lsan-i386.a:没有这样的文件或目录clang-10:错误:链接器命令失败，退出代码1(使用-v查看调用)

似乎找不到带有libclang_rt.lsan-i386.a.的nix包我怎么才能解决这个问题？

Answer 1

你坚持使用clang 10吗？对于最近的clang，一切都如预期的那样工作；对于测试，只需禁用使用-O0的优化，否则就不会出现泄漏(使用12、13和14测试，运行二进制时使用clang 11测试，得到一些错误==517055==ERROR: AddressSanitizer failed to allocate 0x0 (0) bytes of SetAlternateSignalStack (error code: 22))。

为了演示，我创建了一个flake 这里。

$ nix build 'git+https://gist.github.com/tobiasBora/0952c923d3cd892e41fbc3ef025ac020?ref=main#hello'

$ file ./result/bin/a.out
./result/bin/a.out: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163/lib/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, not stripped

$ ./result/bin/a.out
Hello world

=================================================================
==548464==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 7 byte(s) in 1 object(s) allocated from:
    #0 0x40c4f2  (/nix/store/3i0ipj0zwpjm8g1fslvfjb5dng4bd9s0--/bin/a.out+0x40c4f2)
    #1 0x43b858  (/nix/store/3i0ipj0zwpjm8g1fslvfjb5dng4bd9s0--/bin/a.out+0x43b858)
    #2 0x7f381db5624d  (/nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163/lib/libc.so.6+0x2924d) (BuildId: 2bb226bc600b443958c7566207d0d02f8345e6ea)

SUMMARY: LeakSanitizer: 7 byte(s) leaked in 1 allocation(s).

$ nix build 'git+https://gist.github.com/tobiasBora/0952c923d3cd892e41fbc3ef025ac020?ref=main#hello-32'

$ file ./result/bin/a.out
./result/bin/a.out: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /nix/store/bzw74a7dla8iqk2h8wshwi03fbgj2c5h-glibc-2.35-163/lib/ld-linux.so.2, for GNU/Linux 2.6.32, not stripped

$ ./result/bin/a.out

Hello world

=================================================================
==554039==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 7 byte(s) in 1 object(s) allocated from:
    #0 0x8055779  (/nix/store/yh4klla6n8c9flgcxd7r05zj705kycdl--/bin/a.out+0x8055779)
    #1 0x8094238  (/nix/store/yh4klla6n8c9flgcxd7r05zj705kycdl--/bin/a.out+0x8094238)
    #2 0xf7c102f9  (/nix/store/bzw74a7dla8iqk2h8wshwi03fbgj2c5h-glibc-2.35-163/lib/libc.so.6+0x212f9) (BuildId: 0fc69f6f66391d65b1e33788a951319bda8ba1d4)

SUMMARY: LeakSanitizer: 7 byte(s) leaked in 1 allocation(s).