This sort of thing typically means you have a mismatched libc version between your host and target.  They must be the 
same or you will get these bogus shared lib events, since
gdb sets a breakpoint on a libc function to detect shared lib loading/unloading, and if
the libc on the target doesn't match it will trigger spuriously.
 
Colin

________________________________

From: Mark Dowdy [mailto:community-noreply@qnx.com]
Sent: Fri 10/10/2008 8:32 PM
To: momentics-community
Subject: Stop due to shared library event



I'm attempting to debug an app on a QNX630 SP2 system. I'm running gdb
version 5.2.1qnx-nto and Momentics 3.0.0 build 200509222156. When I
debug the application, I get many "Stopped due to shared library event"
errors but there's no clue regarding what the 'event' is that's causing
the problem. Complete console output for the problem session is included
below. Insights would be appreciated.



info tidinfo

Threads for pid 761897 (tmp/EcatTest_gmark_dowdy1223684293764)

Tid:  State:      Flags:

 1    3     0

[Switching to process 761897 (state = 0x03)]

Stopped due to shared library event

info sharedlibrary

From        To          Syms Read   Shared Object Library

0xb8217c3c  0xb826e8fc  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so

0xb82be16c  0xb82ec0e3  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3

0xb03140b4  0xb035319e  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2

Stopped due to shared library event

info sharedlibrary

From        To          Syms Read   Shared Object Library

0xb8217c3c  0xb826e8fc  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so

0xb82be16c  0xb82ec0e3  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3

0xb03140b4  0xb035319e  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2

Stopped due to shared library event

info sharedlibrary

From        To          Syms Read   Shared Object Library

0xb8217c3c  0xb826e8fc  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so

0xb82be16c  0xb82ec0e3  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3

0xb03140b4  0xb035319e  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2

Stopped due to shared library event

info sharedlibrary

From        To          Syms Read   Shared Object Library

0xb8217c3c  0xb826e8fc  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so

0xb82be16c  0xb82ec0e3  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3

0xb03140b4  0xb035319e  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2

Stopped due to shared library event

info sharedlibrary

From        To          Syms Read   Shared Object Library

0xb8217c3c  0xb826e8fc  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so

0xb82be16c  0xb82ec0e3  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3

0xb03140b4  0xb035319e  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2

Stopped due to shared library event

info sharedlibrary

From        To          Syms Read   Shared Object Library

0xb8217c3c  0xb826e8fc  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so

0xb82be16c  0xb82ec0e3  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3

0xb03140b4  0xb035319e  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2

info tidinfo

Threads for pid 761897 (tmp/EcatTest_gmark_dowdy1223684293764)

Tid:  State:      Flags:

*1    3     0

info sharedlibrary

From        To          Syms Read   Shared Object Library

0xb8217c3c  0xb826e8fc  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so

0xb82be16c  0xb82ec0e3  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3

0xb03140b4  0xb035319e  Yes
/cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2





_______________________________________________
QNX Momentics Community Support
http://community.qnx.com/sf/go/post14891

This is not an error this is debugging message. Event is "shared library" event, debugger has an invisible breakpoint on
 them to support source breakpoints in shared libraries.
Every time new library loaded it attempts to insert unresolved breakpoints. It should not cause any problems. Does it?

Mark Dowdy wrote:
> I'm attempting to debug an app on a QNX630 SP2 system. I'm running gdb
> version 5.2.1qnx-nto and Momentics 3.0.0 build 200509222156. When I
> debug the application, I get many "Stopped due to shared library event"
> errors but there's no clue regarding what the 'event' is that's causing
> the problem. Complete console output for the problem session is included
> below. Insights would be appreciated.
> 
>  
> 
> info tidinfo
> 
> Threads for pid 761897 (tmp/EcatTest_gmark_dowdy1223684293764)
> 
> Tid:  State:      Flags:
> 
>  1    3     0
> 
> [Switching to process 761897 (state = 0x03)]
> 
> Stopped due to shared library event
> 
> info sharedlibrary
> 
> From        To          Syms Read   Shared Object Library
> 
> 0xb8217c3c  0xb826e8fc  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so
> 
> 0xb82be16c  0xb82ec0e3  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3
> 
> 0xb03140b4  0xb035319e  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2
> 
> Stopped due to shared library event
> 
> info sharedlibrary
> 
> From        To          Syms Read   Shared Object Library
> 
> 0xb8217c3c  0xb826e8fc  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so
> 
> 0xb82be16c  0xb82ec0e3  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3
> 
> 0xb03140b4  0xb035319e  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2
> 
> Stopped due to shared library event
> 
> info sharedlibrary
> 
> From        To          Syms Read   Shared Object Library
> 
> 0xb8217c3c  0xb826e8fc  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so
> 
> 0xb82be16c  0xb82ec0e3  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3
> 
> 0xb03140b4  0xb035319e  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2
> 
> Stopped due to shared library event
> 
> info sharedlibrary
> 
> From        To          Syms Read   Shared Object Library
> 
> 0xb8217c3c  0xb826e8fc  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so
> 
> 0xb82be16c  0xb82ec0e3  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3
> 
> 0xb03140b4  0xb035319e  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2
> 
> Stopped due to shared library event
> 
> info sharedlibrary
> 
> From        To          Syms Read   Shared Object Library
> 
> 0xb8217c3c  0xb826e8fc  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so
> 
> 0xb82be16c  0xb82ec0e3  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3
> 
> 0xb03140b4  0xb035319e  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2
> 
> Stopped due to shared library event
> 
> info sharedlibrary
> 
> From        To          Syms Read   Shared Object Library
> 
> 0xb8217c3c  0xb826e8fc  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libAtEcatEDK.so
> 
> 0xb82be16c  0xb82ec0e3  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libcpp.so.3
> 
> 0xb03140b4  0xb035319e  Yes
> /cygdrive/c/QNX630/target/qnx6/x86/lib/libc.so.2
> 
> info tidinfo
> 
> Threads for pid 761897 (tmp/EcatTest_gmark_dowdy1223684293764)
> 
> Tid:  State:      Flags:
> 
> *1    3     0
> 
> info sharedlibrary
> 
> From        To          Syms Read   Shared Object Library
> 
> 0xb8217c3c  0xb826e8fc  Yes
>...