mirror of https://github.com/Icinga/icinga2.git
214 lines
6.2 KiB
Markdown
214 lines
6.2 KiB
Markdown
# <a id="debug"></a> Debug Icinga 2
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> **Note**
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>
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> If you are planning to build your own development environment,
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> please consult the `INSTALL.md` file from the source tree.
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## <a id="debug-requirements"></a> Debug Requirements
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Make sure that the debug symbols are available for Icinga 2.
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The Icinga 2 packages provide a debug package which must be
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installed separately for all involved binaries, like `icinga2-bin`
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or `icinga2-ido-mysql`.
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Debian/Ubuntu:
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# apt-get install icinga2-dbg
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RHEL/CentOS:
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# yum install icinga2-debuginfo
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SLES/openSUSE:
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# zypper install icinga2-bin-debuginfo icinga2-ido-mysql-debuginfo
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Furthermore, you may also have to install debug symbols for Boost and your C library.
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If you're building your own binaries you should use the `-DCMAKE_BUILD_TYPE=Debug` cmake
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build flag for debug builds.
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## <a id="development-debug-gdb"></a> GDB
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Install gdb:
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Debian/Ubuntu:
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# apt-get install gdb
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RHEL/CentOS/Fedora:
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# yum install gdb
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SLES/openSUSE:
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# zypper install gdb
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Install the `boost`, `python` and `icinga2` pretty printers. Absolute paths are required,
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so please make sure to update the installation paths accordingly (`pwd`).
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$ mkdir -p ~/.gdb_printers && cd ~/.gdb_printers
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Boost Pretty Printers compatible with Python 3:
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$ git clone https://github.com/mateidavid/Boost-Pretty-Printer.git && cd Boost-Pretty-Printer
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$ git checkout python-3
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$ pwd
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/home/michi/.gdb_printers/Boost-Pretty-Printer
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Python Pretty Printers:
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$ cd ~/.gdb_printers
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$ svn co svn://gcc.gnu.org/svn/gcc/trunk/libstdc++-v3/python
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Icinga 2 Pretty Printers:
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$ mkdir -p ~/.gdb_printers/icinga2 && cd ~/.gdb_printers/icinga2
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$ wget https://raw.githubusercontent.com/Icinga/icinga2/master/tools/debug/gdb/icingadbg.py
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Now you'll need to modify/setup your `~/.gdbinit` configuration file.
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You can download the one from Icinga 2 and modify all paths.
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Example on Fedora 22:
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$ wget https://raw.githubusercontent.com/Icinga/icinga2/master/tools/debug/gdb/gdbinit -O ~/.gdbinit
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$ vim ~/.gdbinit
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set print pretty on
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python
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import sys
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sys.path.insert(0, '/home/michi/.gdb_printers/icinga2')
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from icingadbg import register_icinga_printers
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register_icinga_printers()
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end
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python
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import sys
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sys.path.insert(0, '/home/michi/.gdb_printers/python')
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from libstdcxx.v6.printers import register_libstdcxx_printers
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try:
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register_libstdcxx_printers(None)
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except:
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pass
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end
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python
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import sys
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sys.path.insert(0, '/home/michi/.gdb_printers/Boost-Pretty-Printer')
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import boost_print
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boost_print.register_printers()
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end
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If you are getting the following error when running gdb, the `libstdcxx`
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printers are already preloaded in your environment and you can remove
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the duplicate import in your `~/.gdbinit` file.
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RuntimeError: pretty-printer already registered: libstdc++-v6
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### <a id="development-debug-gdb-run"></a> GDB Run
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Call GDB with the binary and all arguments and run it in foreground.
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# gdb --args /usr/sbin/icinga2 daemon -x debug
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> **Note**
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>
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> If gdb tells you it's missing debug symbols, quit gdb and install
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> them: `Missing separate debuginfos, use: debuginfo-install ...`
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Run the application.
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(gdb) r
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Kill the running application.
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(gdb) k
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Continue after breakpoint.
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(gdb) c
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### <a id="development-debug-gdb-backtrace"></a> GDB Backtrace
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If Icinga 2 aborted its operation abnormally, generate a backtrace.
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(gdb) bt
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(gdb) bt full
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>**Tip**
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>
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> If you're opening an issue at [https://dev.icinga.org] make sure
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> to attach as much detail as possible.
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### <a id="development-debug-gdb-backtrace-stepping"></a> GDB Backtrace Stepping
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Identifying the problem may require stepping into the backtrace, analysing
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the current scope, attributes, and possible unmet requirements. `p` prints
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the value of the selected variable or function call result.
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(gdb) up
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(gdb) down
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(gdb) p checkable
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(gdb) p checkable.px->m_Name
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### <a id="development-debug-gdb-breakpoint"></a> GDB Breakpoints
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To set a breakpoint to a specific function call, or file specific line.
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(gdb) b checkable.cpp:125
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(gdb) b icinga::Checkable::SetEnablePerfdata
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GDB will ask about loading the required symbols later, select `yes` instead
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of `no`.
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Then run Icinga 2 until it reaches the first breakpoint. Continue with `c`
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afterwards.
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(gdb) run
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(gdb) c
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If you want to delete all breakpoints, use `d` and select `yes`.
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(gdb) d
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> **Tip**
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>
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> When debugging exceptions, set your breakpoint like this: `b __cxa_throw`.
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Breakpoint Example:
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(gdb) b __cxa_throw
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(gdb) r
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(gdb) up
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....
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(gdb) up
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#11 0x00007ffff7cbf9ff in icinga::Utility::GlobRecursive(icinga::String const&, icinga::String const&, boost::function<void (icinga::String const&)> const&, int) (path=..., pattern=..., callback=..., type=1)
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at /home/michi/coding/icinga/icinga2/lib/base/utility.cpp:609
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609 callback(cpath);
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(gdb) l
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604
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605 #endif /* _WIN32 */
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606
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607 std::sort(files.begin(), files.end());
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608 BOOST_FOREACH(const String& cpath, files) {
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609 callback(cpath);
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610 }
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611
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612 std::sort(dirs.begin(), dirs.end());
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613 BOOST_FOREACH(const String& cpath, dirs) {
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(gdb) p files
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$3 = std::vector of length 11, capacity 16 = {{static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/agent.conf"}, {static NPos = 18446744073709551615,
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m_Data = "/etc/icinga2/conf.d/commands.conf"}, {static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/downtimes.conf"}, {static NPos = 18446744073709551615,
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m_Data = "/etc/icinga2/conf.d/groups.conf"}, {static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/notifications.conf"}, {static NPos = 18446744073709551615,
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m_Data = "/etc/icinga2/conf.d/satellite.conf"}, {static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/services.conf"}, {static NPos = 18446744073709551615,
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m_Data = "/etc/icinga2/conf.d/templates.conf"}, {static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/test.conf"}, {static NPos = 18446744073709551615,
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m_Data = "/etc/icinga2/conf.d/timeperiods.conf"}, {static NPos = 18446744073709551615, m_Data = "/etc/icinga2/conf.d/users.conf"}}
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