gpt4 book ai didi

c - Valgrind 'noise' 是什么意思?

转载 作者:IT王子 更新时间:2023-10-28 23:58:06 25 4
gpt4 key购买 nike

当我使用 valgrind 帮助调试我正在开发的应用程序时,我注意到大量噪音似乎是在提示标准库。作为测试,我这样做了;

echo 'int main() {return 0;}' | gcc -x c -o test -

然后我就这样做了;

valgrind ./test

==1096== Use of uninitialised value of size 8
==1096== at 0x400A202: _dl_new_object (in /lib64/ld-2.10.1.so)
==1096== by 0x400607F: _dl_map_object_from_fd (in /lib64/ld-2.10.1.so)
==1096== by 0x4007A2C: _dl_map_object (in /lib64/ld-2.10.1.so)
==1096== by 0x400199A: map_doit (in /lib64/ld-2.10.1.so)
==1096== by 0x400D495: _dl_catch_error (in /lib64/ld-2.10.1.so)
==1096== by 0x400189E: do_preload (in /lib64/ld-2.10.1.so)
==1096== by 0x4003CCD: dl_main (in /lib64/ld-2.10.1.so)
==1096== by 0x401404B: _dl_sysdep_start (in /lib64/ld-2.10.1.so)
==1096== by 0x4001471: _dl_start (in /lib64/ld-2.10.1.so)
==1096== by 0x4000BA7: (within /lib64/ld-2.10.1.so)
* large block of similar snipped *
==1096== Use of uninitialised value of size 8
==1096== at 0x4F35FDD: (within /lib64/libc-2.10.1.so)
==1096== by 0x4F35B11: (within /lib64/libc-2.10.1.so)
==1096== by 0x4A1E61C: _vgnU_freeres (vg_preloaded.c:60)
==1096== by 0x4E5F2E4: __run_exit_handlers (in /lib64/libc-2.10.1.so)
==1096== by 0x4E5F354: exit (in /lib64/libc-2.10.1.so)
==1096== by 0x4E48A2C: (below main) (in /lib64/libc-2.10.1.so)
==1096==
==1096== ERROR SUMMARY: 3819 errors from 298 contexts (suppressed: 876 from 4)
==1096== malloc/free: in use at exit: 0 bytes in 0 blocks.
==1096== malloc/free: 0 allocs, 0 frees, 0 bytes allocated.
==1096== For counts of detected errors, rerun with: -v
==1096== Use --track-origins=yes to see where uninitialised values come from
==1096== All heap blocks were freed -- no leaks are possible.

你可以在这里看到完整的结果: http://pastebin.com/gcTN8xGp

我有两个问题;首先有没有办法抑制所有的噪音?

--show-below-main 默认设置为 no,但似乎没有与 --show-after-main 等效的选项。

最佳答案

您可以通过附加来抑制输出

{
ld error suppression
Memcheck:Cond
fun:dl_main
fun:_dl_sysdep_start
fun:_dl_start
obj:/lib64/ld-2.10.1.so
}

/usr/lib/valgrind/default.supp(或定义您自己的抑制文件)。

这似乎是一个已知的链接器/加载器错误,至少对于 Debian 和 Arch Linux 开发人员而言;我不确定其余部分,以及他们计划的行动方案。

关于c - Valgrind 'noise' 是什么意思?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/2864882/

25 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com