GCC 调试选项 -dH
通过此链接： http://gcc.gnu.org/onlinedocs/gcc/Debugging -选项.html
-dH 每当发生错误时生成核心转储。
因此，我编译了一个有语法错误的程序并生成了核心文件。现在如何使用该核心文件？由于尚未生成任何可执行文件，因此无法调用 GDB。
[11:11:12 Wed Apr 27]
~/junk1 $ls
core hell.c
[11:11:15 Wed Apr 27]
~/junk1 $gcc -g hell.c -dH
hell.c: In function ‘main’:
hell.c:4: error: expected ‘;’ before ‘}’ token
gcc: Internal error: Aborted (program cc1)
Please submit a full bug report.
See <http://bugs.opensuse.org/> for instructions.
[11:11:36 Wed Apr 27]
~/junk1 $ls
core hell.c
[11:12:09 Wed Apr 27]
~/junk1 $gdb cc1 core
GNU gdb (GDB) SUSE (6.8.91.20090930-2.4)
Copyright (C) 2009 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 "x86_64-suse-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
***cc1: No such file or directory.***
Missing separate debuginfo for the main executable file
Try: zypper install -C "debuginfo(build-id)=41f1efcceccfa5fa0b3476021c731c489547f86e"
Core was generated by `/usr/lib64/gcc/x86_64-suse-linux/4.4/cc1 -quiet hell.c -quiet -dumpbase hell.c'.
Program terminated with signal 6, Aborted.
#0 0x00007fb1b01654e5 in ?? ()
(gdb)
GDB 在上面的输出中显示： cc1：没有这样的文件或目录。 我应该如何使用该核心文件？
From this link: http://gcc.gnu.org/onlinedocs/gcc/Debugging-Options.html
-dH Produce a core dump whenever an error occurs.
So, I compiled a program with a syntax error and the core file was generated. How can that core file be used now? GDB can't be invoked since any executable has not been generated, yet.
[11:11:12 Wed Apr 27]
~/junk1 $ls
core hell.c
[11:11:15 Wed Apr 27]
~/junk1 $gcc -g hell.c -dH
hell.c: In function ‘main’:
hell.c:4: error: expected ‘;’ before ‘}’ token
gcc: Internal error: Aborted (program cc1)
Please submit a full bug report.
See <http://bugs.opensuse.org/> for instructions.
[11:11:36 Wed Apr 27]
~/junk1 $ls
core hell.c
[11:12:09 Wed Apr 27]
~/junk1 $gdb cc1 core
GNU gdb (GDB) SUSE (6.8.91.20090930-2.4)
Copyright (C) 2009 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 "x86_64-suse-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
***cc1: No such file or directory.***
Missing separate debuginfo for the main executable file
Try: zypper install -C "debuginfo(build-id)=41f1efcceccfa5fa0b3476021c731c489547f86e"
Core was generated by `/usr/lib64/gcc/x86_64-suse-linux/4.4/cc1 -quiet hell.c -quiet -dumpbase hell.c'.
Program terminated with signal 6, Aborted.
#0 0x00007fb1b01654e5 in ?? ()
(gdb)
The GDB says: cc1: No such file or directory, in the above output.
How I am supposed to use that core file?
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评论（2）
我认为这个开关是为了帮助调试gcc，而不是你的程序。 链接到的页面如下所示：
强调我的。
cc1程序是 GCC 的内部部分，它可能位于/usr/lib/或/usr/libexec/下的某个位置。I think that switch is to help debug gcc, not your program. The page you link to starts like this:
Emphasis mine.
The
cc1program is an internal part of GCC, it is probably somewhere under/usr/lib/or/usr/libexec/.gdb -c corefile应该可以工作。我不必使用-dH选项，因此不确定它在帮助调试方面有多大用处。gdb -c corefileshould work. I haven't had to use the-dHoption, so not sure how useful it is in helping with debugging.