- 我正在使用
arm-linux-gcc在主机(debian i386)上编译一个简单的C文件，并带有-g。 - 然后将
a.out文件复制到目标(arm,uclibc)计算机。 - 运行
a.out- 一切都很好。 - 使用GDB(目标)
gdb a.out并列出源代码，它会显示No such file or directory。这个事实一直都是这样吗？ - 如果我将
1.c文件复制到目标，那么list命令就可以列出源代码了。
我的问题:
GDB一直都是这样的，还是有其他选项可以控制？
您有没有关于调试程序的建议？
一些信息可能有用:
源代码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;
}
交叉编译版本（主机）
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)
编译命令：
arm-linux-gcc -g 1.c
主机：
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
目标：
# uname -a
Linux AT91SAM9-RT9x5 2.6.39 #25 Mon Dec 30 17:40:40 CST 2013 armv5tejl GNU/Linux
复制到目标后，然后：
# ls -l
total 1
-rwxr--r-- 1 ftp 83 6094 Feb 21 15:19 a.out
执行正常
# ./a.out
i=0
i=1
i=2
目标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".
调试 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
$3 = 1
(gdb)
如果我将源代码文件 1.c 复制到同一目录中。
# ls -l
-rw-r--r-- 1 ftp 83 158 Feb 21 15:51 1.c
-rwxr--r-- 1 ftp 83 6094 Feb 21 15:19 a.out
现在gdb可以列出源代码。
# gdb a.out
<...>
(gdb) list
warning: Source file is more recent than executable.
1 #include <stdio.h>
2 #include <string.h>
3 #include <stdlib.h>
4 // main function
5 int main(void)
6 {
7 int i;
8 for(i=0;i<3;i++){
9 printf("i=%d\n",i);
10 }
(gdb)
在主机平台上，如果我
- 使用
gcc -g 1.c进行编译。 - 然后重命名或删除
1.c文件。 - 使用
gdb a.out
同样的情况会发生。
zodiac1111@debian:tmp$ 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)