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Implement common code for debug status output and remove daemon-specific
code that is duplicated everywhere.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
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Implement common code for debug config output and remove daemon-specific
code that is duplicated everywhere.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
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The debug library allows to register a `debug_set_all` callback which
should enable all debugs in a daemon. This callback is implemented
exactly the same in each daemon. Instead of duplicating the code, rework
the lib to allow registration of each debug type, and implement the
common code only once in the lib.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
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Done with a combination of regex'ing and banging my head against a wall.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
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Again, see previous commits.
Signed-off-by: David Lamparter <equinox@diac24.net>
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Separate out the debug_init api to have 2 functions:
1) Function to register a callback
2) Function to initiate the cli.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
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Allow multiple callers to initialize themselves to receive
callbacks for debug on/off operations.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
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These are necessary to use functions defined in these headers from C++.
Signed-off-by: David Lamparter <equinox@diac24.net>
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
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C++ doesn't have ISO C11 stdatomic.h or "_Atomic inttype", so use
std::atomic instead to get the headers compatible.
Signed-off-by: David Lamparter <equinox@diac24.net>
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* Add DEBUG*() macros
This set of macros allows you to write printf-like debugging lines that
automatically check whether a debug is on before printing. This should
eliminate the need for explicit checks in simple cases. For example:
if (SUCH_AND_SUCH_DEBUG_IS_ON) {
zlog_warn(...);
}
Becomes:
DEBUG(warn, such_and_such, ...);
Or, equivalently,
DEBUGE(such_and_such, ...);
The levels passed to DEBUG are expanded into the names of zlog_*
functions, so the same zlog levels are available. There's also a set of
macros that have the level built into them; DEBUGE for errors, DEBUGW
for warnings, etc. Good for brevity.
* Add singular setting macros
Change the 'SET' macros to accept a boolean indicating whether the
provided bits should be set or unset, and map on/off macros to them.
Helps condense code where you already have a boolean condition that
tells you what you want to do as you can avoid writing the branch.
Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
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The current strategy for fine-grained debugging across FRR is to use
static long int bitfields, in combination with helper macros that are
copy-pasted between daemons, to hold state on what debugging information
should be collected at any given time. This has a couple of problems:
* These bitfields are generally extern'd and accessed everywhere, so
they are not MT-safe or easy to make MT-safe
* Lots of code duplication from copy-pasting the DEBUG_* macros...
* Code duplication because of the "term" vs "conf" debugging concept
This patch aims to remedy that by providing some infrastructure to work
with debugs. The core concept of using bitfields has been retained, but
the number of these for each debug has been reduced to 1. This allows
easy use of lock-free methods for synchronizing access to debugging
info.
The helper macros have also been retained but they are now collected in
one place and perform exclusively atomic operations.
Finally there is a bit of code that allows daemons to register
callbacks, which I used to implement a command that will toggle all
debugging for any daemons that use these facilities.
Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
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* debug.[ch]: Remove unused files.
* Makefile.am: Remove references to debug.c and debug.h
* ospf_main.c: Remove #include "debug.h" (was not being used, and
lib/debug.h has now been deleted).
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lib/debug.{c,h}: glibc backtrace printing function (from the glibc info page)
configure.ac: check for glibc backtrace and set define
lib/zebra.h: glibc backtrace support
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