Add function which can be used to check if there is any pending
data to process. It can be used to determine if deferred logging
has completed processing.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Remove LOG_MINIMAL kconfig option which was confusing
since LOG_MODE_MINIMAL existed. LOG_MINIMAL was used to
force minimal mode but because of invalid dependencies
it was leading to issues.
Refactored code to use LOG_MODE_MINIMAL everywhere and
renamed LOG_MINIMAL to LOG_DEFAULT_MINIMAL which has impact
on defualt logging mode (which still can be later changed
in conf file or in menuconfig).
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Added log_internal.h for internal APIs. Move functions out of
log_core.h. Log_core.h shall have only macros and functions related
to logging message creation. Log_core.h is included by log.h thus
number of dependencies in that headers must be limited to minimum
to allow including without risk of circular dependencies.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Added implementation of log_msg2 which is creating log messages
using cbprintf packaging and storing them in circular ring buffer
(mpsg_pbuf).
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
The log mechanism, even in immediate mode, adds somewhere
between 1K-2K of footprint to applications that use it.
We want to standardize the logging APIs for all logging
within the kernel, but need to not let platforms with
very constrained RAM/ROM in the dust.
This patch introduces CONFIG_LOG_MINIMAL, which is a very
thin wrapper to printk(). It supports the APIs expressed
in logging/log.h.
This will be the new default for test cases.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit adds basic userspace support to the logging subsystem.
With this change, the following API could be called from user mode:
- LOG_*()
- LOG_INST_*(),
- LOG_HEXDUMP_*(),
- LOG_HEXDUMP_INST_*(),
- LOG_PANIC(), LOG_PROCESS(),
- log_printk(), log_generic(), log_buffrered_cnt(),
- log_filter_set(NULL, ...)
With userspace disabled, the logger behavior and performance
is not affected. With userspace enabled, the calls from kernel
space have an additional overhead introduced by _is_user_context().
The logger behavior changes when it is called from the user context.
All strings logged using LOG_*() and LOG_INST_*() API from userspace
are rendered in place for security reasons and then placed in
log_strdup() memory pool, which should be large enough to hold bursts
of log messages.
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Signed-off-by: Piotr Zięcik <piotr.ziecik@nordicsemi.no>
Cleaning up log.h include dependencies to allow log.h including in base
headers (e.g. kernel.h).
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Modified log_filter_set function to limit level if requested
level is not compiled in. Additionally, extended function to
return actually set level. Removed redundant code from log_cmds.
Change fixes shell log backend initialization which was setting
log levels without taking into account compiled in limits.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Added commands for getting current status and controlling which log
messages are forwared to available backends.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Any word started with underscore followed by and uppercase letter or a
second underscore is a reserved word according with C99.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
Documenting new logger features: waking up processing thread
and internal logger processing thread.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Added configurable threshold of number of buffered log messages
on which log wakes up thread which processes buffered logs. Thread
ID is provided during logger initialization. Feature is optional
and can be disabled by setting CONFIG_LOG_PROCESS_TRIGGER_THR to 0.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Log API can be used before user can explicitly initialize the logger.
In order to ensure that logger core is ready to buffer log messages
it must be initialize as early as possible. Initialization does not
include initialization of default backend since driver may not be
ready and backend is needed only when log messages are processed.
Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
Adding new implementation of logging subsystem. New features
includes: support for multiple backends, improving performance
by deferring log processing to the known context, adding
timestamps and logs filtering options (compile time, runtime,
module level, instance level). Console backend added as the
example backend.
Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
Krzysztof Chruscinski
Kumar Gala
Andrew Boie
Piotr Zięcik
Alberto Escolar Piedras
Anas Nashif
Flavio Ceolin
David B. Kinder