Question

我下载了FabariaGest source code然后编译它你必须运行：

在qt 4系统上：

cmake -DMAKE_INSTALL_PREFIX=directory -DWANT_QT4=ON -DWANT_QWT=ON

在qt5系统上：

cmake -DMAKE_INSTALL_PREFIX=directory -DWANT_QT5=ON -DWANT_QWTQT5=ON

完成后，运行

# make install

因为我在启动软件时遇到分段错误，所以我尝试运行

cd /opt/fabaria_gest
gdb fabaria_gest
run
backtrace

但我只能

[user@localhost fabaria_gest]$ gdb fabaria_gest
GNU gdb (GDB) Fedora 7.9.1-19.fc22
Copyright (C) 2015 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-redhat-linux-gnu".
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 fabaria_gest...(no debugging symbols found)...done.
(gdb) run
Starting program: /opt/fabaria_gest/fabaria_gest 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Detaching after fork from child process 7246.
[New Thread 0x7fffe0798700 (LWP 7244)]

Program received signal SIGSEGV, Segmentation fault.
0x00000000004f568c in QBasicAtomicInteger<int>::load() const ()
(gdb) backtrace
#0  0x00000000004f568c in QBasicAtomicInteger<int>::load() const ()
#1  0x0000000000502a92 in QtPrivate::RefCount::ref() ()
#2  0x0000000000502e37 in QString::QString(QString const&) ()
#3  0x00000000006b9709 in _ZL13getSystemInfov ()
#4  0x00000000006bc29f in main ()
(gdb) 
#0  0x00

我可以做些什么来重新编译软件以获得更好的debuginfos？在GDB中设置set follow-fork-mode没有帮助

Answer 1

使用

cmake -DCMAKE_BUILD_TYPE=Debug ...

将指示cmake生成调试信息，这应该使回溯更容易阅读。

编译Qt应用程序以获得更好的debuginfos（Linux）

1 个答案: