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当我使用 gdb7.6 分析 corefile 时，gdb 打印以下错误：

“./core：没有核心文件处理程序识别格式”

我的环境：

  • HP-UX hp12161 B.11.31 U ia64 0546304299。
  • 编译器：gcc4.7.2。
  • gdb7.6 配置=./configure --enable-64-bit-bfd。

我注意到在 ia64-hpux 平台 gdb 没有调用 set_gdbarch_regset_from_core_section、 deprecated_add_core_fns 接口。

我该怎么做才能解决这个问题？

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1 回答 1

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您应该使用HPE Wildebeest 调试器。这是适用于 hp-ux 的 HPE 的 GNU gdb 分支。GNU gdb 不适用于 hp-ux，既不适用于使用 hp-ux aCC 构建的可执行文件，也不适用于使用 gcc 构建的可执行文件。

例如，对于此系统上可用的任何版本的 gdb：

[ hp-ux_ia64 ~ ] $ gcc --version
gcc (GCC) 4.7.1
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

我做了一个程序转储核心：

[ hp-ux_ia64 ~ ] $ cat > 1.c
main () { ((int*)0)[0]=1; }
[ hp-ux_ia64 ~ ] $ gcc 1.c
[ hp-ux_ia64 ~ ] $ ./a.out
Segmentation fault (core dumped)

在其上运行 GNU gdb，我可以重现您面临的问题。

[ hp-ux_ia64 ~ ] $ /usr/local/bin/gdb -c core
GNU gdb (GDB) 7.6.2
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 "ia64-hp-hpux11.23".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
"/user/ranga/core": no core file handler recognizes format
(gdb) quit

HPE gdb 为我提供了正确的堆栈跟踪。

[ hp-ux_ia64 ~ ] $ /opt/langtools/bin/gdb -c core
HP gdb 6.7 for HP Itanium (32 or 64 bit) and target HP-UX 11iv2 and 11iv3.
Copyright 1986 - 2011 Free Software Foundation, Inc.
Hewlett-Packard Wildebeest 6.7 (based on GDB) is covered by the
GNU General Public License. Type "show copying" to see the conditions to
change it and/or distribute copies. Type "show warranty" for warranty/support.

Reading symbols from a.out...(no debugging symbols found)...done.
Core was generated by `a.out'.
Program terminated with signal 11, Segmentation fault.
SEGV_ACCERR - Invalid Permissions for object
#0  0x4000870:0 in main+0x10 ()
(gdb) bt
#0  0x4000870:0 in main+0x10 ()
(gdb)
于 2020-04-02T10:21:40.420 回答