c++ - gdb 重新设置断点时出错(无法访问内存)

Question

我正在尝试让 gdb 在 pcbsd10 (freebsd10) 中设置一个断点。

我已经用调试符号编译了我的代码，这里是 gdb 的输出

GNU gdb (GDB) 7.7
Copyright (C) 2014 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-unknown-freebsd10.0".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from tor...done.
(gdb) break config.c:3626
Breakpoint 1 at 0xfde72: file src/or/config.c, line 3626.
(gdb) run
Starting program: /usr/home/jon/swdev/apps/tor/src/or/tor -f /home/jon/torrc
Error in re-setting breakpoint 1: Cannot access memory at address 0xfdb90
Error in re-setting breakpoint 1: Cannot access memory at address 0xfdb90
...

而且我的代码继续运行而不会在断点处停止。

这是怎么回事？我怎样才能更深入地了解 gdb 失败的原因？

Answer 1

您可能正在查看此 GDB bug .

虽然看起来 GDB 7.7 应该已经有了修复，但您可能想尝试 7.7.1。

或者，将您的二进制文件构建为非 PIE 二进制文件(从 Makefile 中删除 -fPIE)。