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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.

The following packages need to be installed in order to be able to build and install DLT daemon:

• cmake
• zlib
• dbus

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

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:

• ReleaseNotes
• Glossary
• For Developers
• Logstorage
• MultiNode
• 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

• dlt-daemon(1)
• dlt.conf(5)
• dlt-system(1)
• dlt-system.conf(5)
• dlt-convert(1)
• dlt-sortbytimestamp(1)
• dlt-receive(1)
• dlt-control(1)
• dlt-logstorage-ctrl(1)
• dlt-passive-node-ctrl(1)
• dlt-adaptor-stdin(1)
• dlt-adaptor-udp(1)

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.

https://lists.genivi.org/mailman/listinfo/genivi-diagnostic-log-and-trace_lists.genivi.org

Saya Sugiura [email protected], Quynh Le Hoang Ngoc [email protected]