http://sourceware.org/ml/gdb/2007-09/msg00274.html Is the email thread on the GDB forum.
The issue is debugging a simple multi threaded C++ application using GDB, was using eclipse
until it crashed due to getting this message Cannot find new threads: generic error then I started using gdb to trace the issue.
Hello,
I'm trying to debug simple multithreaded app and get the following error:
[Thread debugging using libthread_db enabled]
Cannot find new threads: generic error
Can set break points and trace as shown below.
(gdb)
Here is the info..
GNU gdb Red Hat Linux (6.6-15.fc7rh)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) list
9 #include <iostream>
10
11 void helloworld(const char* who)
12 {
13 std::cout << who << "says, \"Hello World.\"" << std::endl;
14 }
15
16 int main()
17 {
18 boost::thread thrd(boost::bind(&helloworld, "Bob"));
(gdb) list
19 thrd.join();
20 }
21
(gdb) b main
Breakpoint 1 at 0x8048320: file ../helloworld.cpp, line 18.
(gdb) run
Starting program: /home/tcmichals/workspace/example/Debug/example
[Thread debugging using libthread_db enabled]
Cannot find new threads: generic error
(gdb) n
Single stepping until exit from function _start,
which has no line number information.
Cannot find user-level thread for LWP 3719: generic error
(gdb) n
Single stepping until exit from function _start,
which has no line number information.
Cannot find user-level thread for LWP 3719: generic error
The kernel version is:
Linux version 2.6.22.4-65.fc7 (kojibuilder@xenbuilder2.fedora.redhat.com)
(gcc v
ersion 4.1.2 20070502 (Red Hat 4.1.2-12)) #1 SMP Tue Aug 21 22:36:56 EDT
2007
Hybrid Mode
