Question

我已经完成了与此错误相关的答案。但是，我的问题是，一旦我有libc的debuginfo，我应该放置这个库的位置是什么，以便valgrind看到它？

我已经下载了valgrind并为我的目标环境进行了交叉编译。我尝试了以下所有不同的组合：

我将libc放在/ lib和debuginfo中的/ lib / debug
将debuginfo重命名为libc.debug
导出VALGRIND_LIB以包含/ lib，/ lib / debug

最后但并非最不重要的是，以下是实际错误：

==29946== Memcheck, a memory error detector
==29946== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==29946== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info
==29946== Command: /bin/my_prog
==29946==

valgrind:  Fatal error at startup: a function redirection
valgrind:  which is mandatory for this platform-tool combination
valgrind:  cannot be set up.  Details of the redirection are:
valgrind:
valgrind:  A must-be-redirected function
valgrind:  whose name matches the pattern:      strcmp
valgrind:  in an object with soname matching:   ld-linux-armhf.so.3
valgrind:  was not found whilst processing
valgrind:  symbols from the object with soname: ld-linux-armhf.so.3
valgrind:
valgrind:  Possible fixes: (1, short term): install glibc's debuginfo
valgrind:  package on this machine.  (2, longer term): ask the packagers
valgrind:  for your Linux distribution to please in future ship a non-
valgrind:  stripped ld.so (or whatever the dynamic linker .so is called)
valgrind:  that exports the above-named function using the standard
valgrind:  calling conventions for this platform.  The package you need
valgrind:  to install for fix (1) is called
valgrind:
valgrind:    On Debian, Ubuntu:                 libc6-dbg
valgrind:    On SuSE, openSuSE, Fedora, RHEL:   glibc-debuginfo
valgrind:
valgrind:  Note that if you are debugging a 32 bit process on a
valgrind:  64 bit system, you will need a corresponding 32 bit debuginfo
valgrind:  package (e.g. libc6-dbg:i386).
valgrind:
valgrind:  Cannot continue -- exiting now.  Sorry.

Answer 1

如果目标是glibc，则需要确保没有从动态加载器（@alex-team）中剥离@alex-team/marketing。 valgrind需要这些符号才能起作用。

Answer 2

我遇到了同样的问题，这是我的解决方法：
将ld-xx.so in /lib路径替换为调试版本。

这是我的情况。我正在使用Yocto来构建rootfs，因此将poky/build/tmp/work/xxxx/glibc/2.26-r0/image/lib/ld-2.26.so从您的构建路径复制到Linux FS路径/lib，以替换发行版构建的原始/lib/ld-2.26.so。

这样做之后，valgrind可以正常工作。

警告：在正在运行的系统上更换装载程序会使其变形！这些步骤有效：

上传新的加载器以定位到/ lib以外的路径
将新加载程序标记为可执行文件（chmod 755）
复制（不要移动！）旧的加载器
将新的加载程序复制到/ lib

valgrind要求debuginfo libc6-dbg

2 个答案: