![](/img/trans.png)
[英]gdb won't load shared libs symbols, not even libc.so (musl), when loading a core file
[英]GDB won't load source file
arm-linux-gcc
在主機(debian i386)上使用-g
編譯一個簡單的 C 文件。a.out
文件復制到目標(arm、uclibc)電腦上。a.out
- 沒問題。gdb a.out
並列出源代碼,它說No such file or directory
。 事實一直如此嗎?1.c
文件復制到目標,則list
命令會列出源代碼。我的問題:
一些信息可能有用:
源代碼 1.c 文件:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
// main function
int main(void)
{
int i;
for(i=0;i<3;i++){
printf("i=%d\n",i);
}
return 0;
}
交叉編譯版本(主機)
zodiac1111@debian:tmp$ arm-linux-gcc -v
Using built-in specs.
Target:arm-unknown-linux-uclibcgnueabi
Configured with:/home/ldsh/rt9x5/linux/buildroot/buildroot/output/toolchain/gcc-4.3.5/configure \
--prefix=/opt/rt9x5/arm-linux-uclibcgnueabi/usr --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu \
--target=arm-unknown-linux-uclibcgnueabi --enable-languages=c,c++ \
--with-sysroot=/opt/rt9x5/arm-linux-uclibcgnueabi/usr/arm-unknown-linux-uclibcgnueabi/sysroot \
--with-build-time-tools=/opt/rt9x5/arm-linux-uclibcgnueabi/usr/arm-unknown-linux-uclibcgnueabi/bin \
--disable-__cxa_atexit --enable-target-optspace --disable-libgomp --with-gnu-ld --disable-libssp \
--disable-multilib --disable-tls --enable-shared --with-gmp=/opt/rt9x5/arm-linux-uclibcgnueabi/usr \
--with-mpfr=/opt/rt9x5/arm-linux-uclibcgnueabi/usr --enable-threads --disable-decimal-float \
--with-float=soft --with-abi=aapcs-linux --with-arch=armv5te --with-tune=arm926ej-s \
--with-pkgversion='Buildroot 2011.05-dirty' \
--with-bugurl=http://bugs.buildroot.net/ : (reconfigured) /home/ldsh/rt9x5/linux/buildroot/buildroot/output/toolchain/gcc-4.3.5/configure \
--prefix=/opt/rt9x5/arm-linux-uclibcgnueabi/usr --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu \
--target=arm-unknown-linux-uclibcgnueabi --enable-languages=c,c++ \
--with-sysroot=/opt/rt9x5/arm-linux-uclibcgnueabi/usr/arm-unknown-linux-uclibcgnueabi/sysroot \
--with-build-time-tools=/opt/rt9x5/arm-linux-uclibcgnueabi/usr/arm-unknown-linux-uclibcgnueabi/bin \
--disable-__cxa_atexit --enable-target-optspace --disable-libgomp --with-gnu-ld --disable-libssp \
--disable-multilib --disable-tls --enable-shared --with-gmp=/opt/rt9x5/arm-linux-uclibcgnueabi/usr \
--with-mpfr=/opt/rt9x5/arm-linux-uclibcgnueabi/usr --enable-threads --disable-decimal-float \
--with-float=soft --with-abi=aapcs-linux --with-arch=armv5te --with-tune=arm926ej-s \
--with-pkgversion='Buildroot 2011.05-dirty' --with-bugurl=http://bugs.buildroot.net/
Thread model:posix
gcc version 4.3.5 (Buildroot 2011.05-dirty)
編譯命令:
arm-linux-gcc -g 1.c
主持人:
zodiac1111@debian:tmp$ uname -a
Linux debian 3.12-1-686-pae #1 SMP Debian 3.12.9-1 (2014-02-01) i686 GNU/Linux
目標:
# uname -a
Linux AT91SAM9-RT9x5 2.6.39 #25 Mon Dec 30 17:40:40 CST 2013 armv5tejl GNU/Linux
復制到目標后,然后:
# ls -l
total 1
-rwxr--r-- 1 ftp 83 6094 Feb 21 15:19 a.out
執行沒問題
# ./a.out
i=0
i=1
i=2
目標 gdb 版本
# gdb -v
dlopen failed on 'libthread_db.so.1' - File not found
GDB will not be able to debug pthreads.
GNU gdb 6.8
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "arm-unknown-linux-uclibcgnueabi".
調試 a.out
# gdb a.out
<...>
(gdb) list
1 1.c: No such file or directory.
in 1.c
(gdb) break main
Breakpoint 1 at 0x847c: file 1.c, line 8.
(gdb) run
Starting program: /data/a.out
Breakpoint 1, main () at 1.c:8
8 in 1.c
(gdb) step
9 in 1.c
(gdb) p i
$1 = 0
(gdb) step
i=0
8 in 1.c
(gdb) p i
$2 = 0
(gdb) step
9 in 1.c
(gdb) p i
$3 = 1
(gdb)
如果我將源代碼文件 1.c 復制到同一目錄中
# ls -l
-rw-r--r-- 1 ftp 83 158 Feb 21 15:51 1.c
-rwxr--r-- 1 ftp 83 6094 Feb 21 15:19 a.out
gdb 現在可以列出源代碼了。
# gdb a.out
<...>
(gdb) list
warning: Source file is more recent than executable.
1 #include <stdio.h>
2 #include <string.h>
3 #include <stdlib.h>
4 // main function
5 int main(void)
6 {
7 int i;
8 for(i=0;i<3;i++){
9 printf("i=%d\n",i);
10 }
(gdb)
在主機平台,如果我
gcc -g 1.c
編譯。1.c
文件。gdb a.out
出現同樣的情況。
zodiac1111@debian:tmp$ gdb -v
GNU gdb (GDB) 7.6.2 (Debian 7.6.2-1)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
zodiac1111@debian:tmp$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i486-linux-gnu/4.8/lto-wrapper
Target: i486-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 4.8.2-14' --with-bugurl=file:///usr/share/doc/gcc-4.8/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.8 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.8 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libmudflap --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.8-i386/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.8-i386 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.8-i386 --with-arch-directory=i386 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-targets=all --enable-multiarch --with-arch-32=i586 --with-multilib-list=m32,m64,mx32 --with-tune=generic --enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu
Thread model: posix
gcc version 4.8.2 (Debian 4.8.2-14)
AFAIK 您需要目標機器(運行調試器的地方)上的源副本。
另一種調試方法是在目標機器上的 gdbserver 下運行您的代碼,然后從您的 PC 連接到 gdbserver。 因此,首先在目標機器上執行以下操作:
gdbserver localhost:9999 a.out
然后在您的 PC 上執行以下操作:
gdb a.out
target remote your-target-ip-or-name:9999
...
對我來說,使用您的開關進行編譯,然后嘗試在 gdb 中列出源按預期列出源。 您不得移動源代碼或二進制文件,否則 gdb 將無法找到它。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.