Start the maemopad application from the gdb. (gdb) run Starting program: /targets/x86/usr/bin/maemopad [Thread debugging using libthread_db enabled] [New Thread -1222154560 (LWP 22944)] /home/maemo/.osso/current-gtk-key-theme:1: Unable to find include file: "keybindings.rc" maemopad: GLIB Add option -g to CFLAGS Make sure you have set option -g in CFLAGS in the debian/rules file, and that this option is effective and always enabled. The ld.so.1 libraries are part of the core file image like libc.so or any other library, so you need the 32-bit ld.so.1 library or 64-bit ld.so.1 library that matches the program Now the backtrace (bt) can be listed from application to see what functions have been called. http://ibuildsystem.com/warning-cannot/warning-cannot-initialize-thread-debugging-library-generic-error.php
On gnu/Linux and Solaris systems, gdb uses a “helper” libthread_db library to obtain information about threads in the inferior process. To apply a command to all threads in descending order, type thread apply all command. Compile the gdb_example.c application in the Scratchbox for armel architecture. [sbox-x86: ~] > sb-conf select armel Hangup Shell restarting... [sbox-armel: ~] > pwd /home/user [sbox-armel: ~] > cd src/testing/gdb_example [sbox-armel: ~/src/testing/gdb_example] The second echo command defines the name of the core dump file.
http://maemo.org/development/tools/doc/strace ltrace - a library call tracer. Valgrind works only in the X86 environment under Scratchbox, so this tool cannot be used in the device itself. Here the maemopad will be used as an example application to debug in the X86 target with gdb.
It can also be seen that the sleep() function has further called the nanosleep() function, and that is when it got the -SIGSEGV signal (see the note above). 22.214.171.124.4 Debugging Core Check your packages debian/rules file and remove all lines that have statements to create dbg packages. Internally, the default value comes from the LIBTHREAD_DB_SEARCH_PATH macro. If the package has any function(s) that have the noreturn GCC attribute, you need to make sure that the object(s) containing those are compiled with -fno-omit-frame-pointer (or remove the noreturn attribute).
You may find this useful in writing breakpoint conditional expressions, command scripts, and so forth. GDB will be unable to debug shared library initializers Also tried building gdb from source, no luck. Unlike the thread number component of the thread ID, no two threads have the same global ID, even when you're debugging multiple inferiors. How does Gandalf end up on the roof of Isengard?
The link to the full Valgrind manual is given at the end of this section. 126.96.36.199 Installing Valgrind Tool Installing Valgrind is simple. Done Need to get 384kB of source archives. yruss972 commented Mar 26, 2014 I did the following: 1) removed the ife directory from /opt/local/lib/node_modules/vippy/node_modules 2) cloned the node-ife project into my homedir 3) from inside /opt/local/lib/node_modules/vippy/ ran npm install For example, (gdb) info threads Id Target Id Frame * 1 process 35 thread 13 main (argc=1, argv=0x7ffffff8) 2 process 35 thread 23 0x34e5 in sigpause () 3 process 35
This also produces an ASCII or HTML report of allocation backtraces. Desktop and Control Panel applications are both launched by the maemo-launcher daemon. If you omit path, ‘libthread-db-search-path’ will be reset to its default value ($sdir:$pdir on gnu/Linux and Solaris systems). dbx might display one or more of the following error messages when you load a “mismatched” core file: dbx: core file read error: address 0xff3dd1bc not available dbx: warning: could not
The gdb thread debugging facility allows you to observe all threads while your program runs—but whenever gdb takes control, one thread in particular is always the focus of debugging. http://ibuildsystem.com/warning-cannot/warning-cannot-set-rr-scheduler.php In other words, gdb assigns a thread number to the program's “main thread” even if the program is not multi-threaded. There is absolutely no warranty for GDB. It shows also the parameters to the called functions. (gdb) bt #0 example_3 () at gdb_example.c:48 #1 0x080483dc in example_2 (a=0x80484f8 "parameter here") at gdb_example.c:39 #2 0x080483b9 in example_1 (x=2) at
dh_* commands) in your debian/rules file, use this instead: DEB_DH_STRIP_ARGS :=
When debugging threads in an application, gdb needs to be linked against the same thread library that the application is using. 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. show print thread-eventsShow whether messages will be printed when gdb detects that threads have started and exited. See Stopping and Starting Multi-thread Programs, for more information about how gdb behaves
There are other tutorials and documentation readily available in the Internet for that purpose. thread find [regexp]Search for and display thread ids whose name or systag matches the supplied regular expression. Giving higher number takes a bit more memory. Now in example_1(1) function.
Activate the X86 target, go to the testing directory and download the source package of maemopad application. [sbox-armel] sb-conf select x86 [sbox-x86] cd ~/src/ [sbox-x86 ~/src] mkdir maemopad [sbox-x86 ~/src/maemopad] cd thread thread-idMake thread ID thread-id the current thread. Setting up valgrind (3.3.0-1.osso1) ... [sbox-x86: ~] > N.B. http://ibuildsystem.com/warning-cannot/warning-cannot-load-sbd.php Forcing everyone to speak the same language My cat sat on my laptop, now the right side of my keyboard types the wrong characters Straight line equation How to handle a
Get:1 http://juri.research.nokia.com diablo/free maemopad 2.3 (dsc) [476B] Get:2 http://juri.research.nokia.com diablo/free maemopad 2.3 (tar) [384kB] Fetched 384kB in 0s (4637kB/s) dpkg-source: warning: extracting unsigned source package (./maemopad_2.3.dsc) dpkg-source: extracting maemopad in maemopad-2.3 In addition to a per-inferior number, each thread is also assigned a unique global number, also known as global thread ID, a single integer. In the long run, it is better to modify the source package to generate a separate debug symbol (-dbg) package. You can download these from maemo.org: valgrind_example.tar.gz. [sbox-x86: ~] > mkdir src [sbox-x86: ~] > cd src [sbox-x86: ~/src] > After downloading, just copy the valgrind_example.tar.gz file to the ~/src/ directory
This example follows the basic logic of the first example, but this time is performed in the device. Type "show copying" to see the conditions. The default values for core dumps can be seen by reading the file linuxrc with the more command in the device, and by studying the enable_coredumps() function: /home/user # more /mnt/initfs/linuxrc On these systems, a name specified with ‘thread name’ will override the system-give name, and removing the user-specified name will cause gdb to once again display the system-specified name.
snip ... (gdb) run /usr/bin/hildon-desktop.launch ... If you are looking at a core file from a threaded program, and the where command does not display a stack, try using lwp commands. mkdir /usr/lib/debug cd /usr/lib/debug mkdir targets ln -s /usr/lib/debug \ targets/$(sh -c '. /targets/links/scratchbox.config;echo $SBOX_TARGET_NAME') The reason for this is that realpath on libraries and binaries inside Scratchbox returns /scratchbox/targets/.../usr/lib/... postwait/node-ife#2 yruss972 commented Mar 26, 2014 I installed from NPM and just saw the IPV6 issue on the node-ife repo.
the ones the application is using) from the device to the Scratchbox. Their plug-ins are all shared libraries (i.e. .so files). These options work when debugging a core file, where assign $fp=... See the section above about prelinked binaries and libraries.
non-Scratchbox version of gdb) is used. The one used can be checked with: [sbox-x86: ~] > which gdb /targets/links/arch_tools/bin/gdb If only using the command gdb, then the gdb used is the one provided by Scratchbox. When clicking the hello world plug-in in the Control Panel, the execution should stop at the given breakpoint. The reason for this is that there might be some software packages in the SDK repositories that are so-called sdk variants.
snip ... /home/user # rich-core-extract /media/mmc1/core-dumps/gdb_example2-11-1390.rcore.lzo \ coredir The newly-created coredir includes lots of information in different files about the system. C++ compilation can perform name mangling –fge Dec 27 '11 at 1:34 It's a program including C++ code, while I don't think name mangling bothers here. –Fei Dec 28