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# Going further
This part of the documentation is dedicated to developers who want to dig into some more specific topics about Jami.
```{toctree}
:maxdepth: 1
choosing-crf-value-for-encoder
delivery-status
important-rfcs
location-sharing
message-displayed-status
setting-up-your-own-turn-server
```
\ No newline at end of file
##############
Going further
##############
This part of the documentation is dedicated to developers who want to dig
some more specific topics about Jami.
.. toctree::
:maxdepth: 1
choosing-crf-value-for-encoder
delivery-status
important-rfcs
location-sharing
message-displayed-status
setting-up-your-own-turn-server
\ No newline at end of file
# Developer manual
The Jami developer manual is a reference for Jami developers and contributors.
It documents the various aspects of hacking on and developing Jami.
It includes in-depth explanations of how Jami is designed and how its various parts work together.
```{toctree}
:maxdepth: 1
feature-requests
new-developers/index
jami-concepts/index
going-further/index
processes/index
```
\ No newline at end of file
################
Developer manual
################
The Jami developer manual is a reference for Jami developers and
contributors, documenting the various aspects of hacking on and
developing Jami, including in-depth explanations of how Jami is
designed and how its various parts work together.
.. toctree::
:maxdepth: 1
feature-requests
new-developers/index
jami-concepts/index
going-further/index
processes/index
\ No newline at end of file
# Debugging tools
There are several ways to debug Jami from a developer perspective, depending on what is required to be debugged.
## Loggers
The first way is to use runtime loggers.
Starting `jami` with `-d` will enable logging by the daemon (or the Troubleshoot section in the General settings).
All logs are not enabled by default, as Jami uses several libraries.
However, passing environment variables enables logs:
+ `SIPLOGLEVEL=5` enables logs from PJSIP.
+ `DHTLOGLEVEL=5` enables logs from OpenDHT.
+ `AVLOGLEVEL=50` enables logs from ffmpeg.
## Debuggers
Generally, the IDE has an embedded debugger.
Otherwise, `gdb` can be used, for example, to be able to add breakpoints, backtraces from crashes, print internal structures, etc.
To get debug symbols, it is required to compile the project in *DEBUG* mode.
Some useful commands:
+ `b file.cpp:line` - add a breakpoint (*file.cpp:line* can be replaced by a symbol)
+ `t a a bt` - (thread apply all backtrace) to get all backtraces
+ `Ctrl + X / A` - pass in graphical view
+ `p` - print an internal value.
```{note}
Visual Studio Code is fully supported by Jami and can be used to debug the project.
```
## Profilers
Debuggers are useful, but they do not show real-time memory consumption/network activity/CPU usage.
For this, an embedded profiler in the (Android Studio, Qt Creator/Visual Studio, etc.) IDE can be used.
## AddressSanitizer
[AddressSanitizer](https://github.com/google/sanitizers/wiki/AddressSanitizer) can be useful to detect leaks, crashes, and potential deadlocks at runtime.
To enable this, compile the daemon with `CXXFLAGS+="-fsanitize=address"`.
Other flags like `tsan` may be useful.
## Valgrind/Callgrind
[Valgrind](https://valgrind.org/) is a tool to watch allocations, CPU usage, and more and can be used via:
`valgrind --tool=callgrind ./jami -d`.
This will make the application very slow but can provide useful reports about memory allocation/performance usage (**KCacheGrind** can be used to read reports).
## Tests
Daemon has many tests and coverage enabled.
If the daemon is built in static (else private symbols will not be available), adding new tests can help to reproduce bugs, solve bugs, and avoid any regression.
(cf. `daemon/tests/unitTests`)
## Agent
Tests are only using one daemon to simulate both peers.
So it can be difficult to test in various environments.
Another possibility is to write a scenario and run an agent (documentation is available in the daemon's repository).
## LTTng
Finally, tracepoints can be created and analyzed.
`daemon/tools/trace` provide the documentation and some examples.
The advantage of [LTTng](https://lttng.org/) is that it is quicker than logs, can be triggered by system events and can be used with tracepoints already present in the kernel (so that it can be used with tracepoints from network interfaces).
## Tests
Both clients and daemon have tests.
Daemon's tests are written in C++ and use the `cppunit` framework.
They are located in the `daemon/tests` directory.
\ No newline at end of file
Debugging Tools
---------------
There are several ways to debug Jami from a developer perspective, depending on what you want to debug.
Loggers
~~~~~~~
The first way is to use runtime loggers. Starting `jami` with `-d` will enable logging by the daemon
(or the Troubleshoot section in the General settings). Because Jami uses several libraries, we do not
enable all logs by default. But you can pass some environment variables to show it:
+ `SIPLOGLEVEL=5` for enabling logs from PJSIP.
+ `DHTLOGLEVEL=5` for enabling logs from OpenDHT.
+ `AVLOGLEVEL=50` for enabling logs from ffmpeg.
Debuggers
~~~~~~~~~
Generally your IDE has an embedded debugger. Else, you can use `gdb` for example to be able to
add breakpoints, backtraces from crashes, print internal structures, etc. You need to compile the
project in *DEBUG* mode to get debug symbols.
Some useful commands:
+ `b file.cpp:line` - Add a breakpoint (*file.cpp:line* can be replaced by a symbol)
+ `t a a bt` - (thread apply all backtrace) to get all backtraces
+ `Ctrl + X / A` - pass in graphical view
+ `p` - print an internal value.
Note: VSCode is fully supported by Jami and can be used to debug the project.
Profilers
~~~~~~~~~
Debuggers are useful, but they do not show real-time memory consumption/network activity/CPU usage.
For this, you can use the embedded profiler in your IDE (from Android Studio or Qt Creator/Visual Studio
for example).
Address Sanitizer
~~~~~~~~~~~~~~~~~
This can be useful to detect leaks, crashes, potential deadlocks at runtime. To enable this, you can
compile the daemon with `CXXFLAGS+="-fsanitize=address"`. Other flags like `tsan` may be useful.
Valgrind/Callgrind
~~~~~~~~~~~~~~~~~~
Valgrind is a tool to watch allocations, CPU usage and more and can be used via:
`valgrind --tool=callgrind ./jami -d`. This will make the application very slow but can provide useful
reports about memory allocation/performance usage (**KCacheGrind** can be used to read reports).
Tests
~~~~~
Daemon has many tests and coverage enabled. If the daemon is built in static (else private symbols will
not be available), adding new tests can help to reproduce bugs, solve bugs and avoid any regression.
(cf. `daemon/tests/unitTests``)
Agent
~~~~~
Tests are only using one daemon to simulate both peers. So it can be difficult to test in various
environments. Another possibility is to write a scenario and run an agent (documentation is available
in the daemon's repository).
LTTng
~~~~~
Finally, tracepoints can be created and analyzed. `daemon/tools/trace` provide the documentation
and some examples. The advantage of LTTng is that it is quicker than logs, can be triggered by system
events and can be used with tracepoints already present in the kernel (so that it can be used with
tracepoints from network interfaces).
Tests
~~~~~
Both clients and daemon have tests. Daemon's tests are written in C++ and use the `cppunit` framework.
They are located in the `daemon/tests` directory.
\ No newline at end of file
# New developers
This part of the documentation is intended for new developers who want to contribute to the project.
It explains some of the tools and conventions.
```{toctree}
:maxdepth: 1
apis-of-jami
coding-style
debugging-tools
improving-quality-of-jami
qt-qml-coding-style
qt-qml-testing-tools
submitting-your-first-patch
working-with-gerrit
```
\ No newline at end of file
##############
New Developers
##############
This part of the documentation is intended for new developers who want to
contribute to the project. It explains the tools, some conventions and some
tools.
.. toctree::
:maxdepth: 1
apis-of-jami
coding-style
debugging-tools
improving-quality-of-jami
qt-qml-coding-style
qt-qml-testing-tools
submitting-your-first-patch
working-with-gerrit
\ No newline at end of file
#########
Processes
#########
# Processes
This section describes the processes that are used to develop and release the
software.
This section describes the processes that are used to develop and release the software.
.. toctree::
:maxdepth: 1
```{toctree}
:maxdepth: 1
design-process
release-process
\ No newline at end of file
design-process
release-process
```
\ No newline at end of file
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