Diagnostic Log and Trace
This component provides a log and trace interface, based on the standardised protocol specified in the AUTOSAR standard 4.0 DLT. This software can be used by GENIVI components and other applications as logging framework.
DLT basically consists of 3 components:
- DLT Library: Enables DLT logging for DLT user applications and temporary storage of log messages if daemon isn't available.
- DLT Daemon: Receiving log messages from DLT user applications and temporary storage of log messages if client isn't available. Transmit log messages to DLT Client and response to control messages.
- DLT Client: Receiving and storing log messages from DLT Daemon into one single trace file and sending control message
Furthermore, the repository contains several adaptors, console utilities as well as test applications.
Build and install
The following packages need to be installed in order to be able to build and install DLT daemon:
On Ubuntu those dependencies can be installed with the following command:
sudo apt-get install cmake zlib1g-dev libdbus-glib-1-dev
To build and install the DLT daemon, follow these steps:
mkdir build cd build cmake .. make optional: sudo make install optional: sudo ldconfig
|BUILD_SHARED_LIBS||ON||Set to OFF to build static libraries|
|DLT_IPC||"FIFO"||Set to either "UNIX_SOCKET" or "FIFO"|
|WITH_DLT_USE_IPv6||ON||Set to ON for IPv6 support|
|WITH_DLT_EXAMPLES||ON||Set to ON to build src/examples binaries|
|DLT_USER||genivi||Set user for process not run as root|
|WITH_CHECK_CONFIG_FILE||OFF||Set to ON to create a configure file of CheckIncludeFiles and CheckFunctionExists|
|WITH_UDP_CONNECTION||ON||Set to ON to enable dlt UDP multicast SUPPORT|
Command Line Tool Options
|WITH_DLT_ADAPTOR||OFF||Set to ON to build src/adaptor binaries|
|WITH_DLT_CONSOLE||ON||Set to ON to build src/console binaries|
|WITH_DLT_SYSTEM||OFF||Set to ON to build src/system binaries|
|WITH_DLT_LOGSTORAGE_CTRL_UDEV||OFF||PROTOTYPE! Set to ON to build|
|WITH_DLT_KPI||OFF||Set to ON to build src/kpi binaries|
Linux OS Integration Options
|WITH_SYSTEMD||OFF||Set to ON to run CMakeLists.txt in systemd|
|WITH_SYSTEMD_WATCHDOG||OFF||Set to ON to use the systemd watchdog in dlt-daemon|
|WITH_SYSTEMD_JOURNAL||OFF||Set to ON to use the systemd journal in dlt-system|
|WITH_DLT_DBUS||OFF||Set to ON to build src/dbus binaries|
|WITH_DOC||OFF||Set to ON to build documentation target|
|WITH_MAN||OFF||Set to OFF to skip building of man pages|
|WITH_TESTSCRIPTS||OFF||Set to ON to run CMakeLists.txt in test scripts|
|WITH_DLT_TESTS||ON||Set to ON to build src/test binaries|
|WITH_DLTTEST||OFF||Set to ON to build with modifications to test User-Daemon communication with corrupt messages|
|WITH_DLT_UNIT_TESTS||OFF||Set to ON to build unit test binaries|
|WITH_GPROF||OFF||Set -pg to compile flag|
Experimental Features Options
|WITH_DLT_SHM_ENABLE||OFF||Set to OFF to use FIFO as IPC from user to daemon|
|WITH_DLT_CXX11_EXT||OFF||Set to ON to build C++11 extensions|
|WITH_DLT_COREDUMPHANDLER||OFF||EXPERIMENTAL! Set to ON to build src/core_dump_handler binaries. EXPERIMENTAL|
In order to change these options, you can modify these values with cmake, do the appropriate changes in CmakeList.txt or via the commandline for cmake
Change a value with: cmake -D<Variable>=<Value>, E.g.
cmake .. -DWITH_SYSTEMD=ON -DWITH_SYSTEMD_JOURNAL=ON -DCMAKE_INSTALL_PREFIX=/usr
Specific documentation can be found in the following files:
- For Developers
- Extended Network Trace
- DLT Filetransfer
- DLT KPI
- DLT Core Dump Handler
All text based documentation will be replaced with by Markdown-based documentation for convinient access.
Old documentation (not maintained - will be removed in future releases):
- DLT Design Specification: doc/dlt_design_specification.txt
The API documentation is generated with doxygen.
mkdir build cd build cmake -DWITH_DOC=ON .. make doc
The man pages are generated with pandoc.
If the man pages are changed the following command must be executed.
mkdir build cd build cmake -DWITH_MAN=ON .. make generate_man
The generated man pages overwrite the existing ones.
Start working, best practice is to commit smaller, compilable pieces during the work that makes it easier to handle later on.
If you want to commit your changes, create a Pull Request in Github.
Before contributing code, run uncrustify to harmonize code style.
Configuration: util/uncrustify.cfg uncrustify version: 0.68_f
List of open issues can be found on Github
- DLT library: Usage of dlt_user_log_write_float64() and DLT_FLOAT64() leads to "Illegal instruction (core dumped)" on ARM target.
- DLT library: Nested calls to DLT_LOG_ ... are not supported, and will lead to a deadlock.
- For Non linux platforms [eg: QNX] IPC supported is UNIX_SOCKET. For Linux Platforms both IPC FIFO and UNIX_SOCKET are supported
Developed and tested with Ubuntu Linux 16 64-bit / Intel PC
Full information on the license for this software is available in the "LICENSE" file. Full information on the license for the cityhash code is available in "COPYING" file in src/core_dump_handler/cityhash_c.