Also check if there is enough space to write the payload bytes.
We check if there is enough space for the invoke_item structure first.
Then we calculate how much bytes we need to use for the payload but we
fail to check if we can actually write that much data, risking
overwriting existing data from the ringbuffer and causing a crash later
when we try to jump to invalid memory.
Add some more comments.
Check if we are driving or following and only start the timers when we
are the driver of the graph.
Ready events from non-drivers are not really a problem because they are
ignored. They only cause unnecessary wakeups in the graph.
Mark some structures, arrays static/const at various places.
In some cases this prevents unnecessary initialization
when a function is entered.
All in all, the text segments across all shared
libraries are reduced by about 2 KiB. However,
the total size increases by about 2 KiB as well.
Several places in the code don't handle reconnecting DBus connections
yet. In those cases, a ref to the DBusConnection handle needs to be
kept, so that there's no use-after-free if it gets freed by spa_dbus
if the connection is broken.
Adjust spa_dbus so that others keeping additional refs is safe.
Set this once during setup so we don't have to remember to call fflush() after
each logging operation.
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
In the interested of making the logs narrower, let's drop some digits from the
clock_gettime() seconds value. Clamping to 5 digigts, this gives us just under
28h before we wrap which is likely good enough for debugging.
Write the timestamp and location into a temporary buffer, then include them in
the message print. This makes bugs involving size vs length less likely and
provides a fixed limit for how much space the filename can take in the
message.
The two are functionally equivalent, but spa_snprintf never returns a value
higher than the size, preventing memory corruption where our input string
exceeds the target buffer size (see c851349f1).
Niche case: we can no longer differ between real overflow and fitting an
N-byte string into an N+1 sized buffer, we now get a "...truncated" message
now for log messages of exactly 999 bytes long.
If the message was too long, then the `vsnprintf()` call would
fill up `location`, leaving no space for the color escape sequence
and the newline, causing a stack buffer overrun here:
size += snprintf(p + size, len - size, "%s\n", impl->colors ? suffix : "");
Fix that by reserving the last 24 bytes of the message buffer.
When we add a new listener to an object, it will emit the full state
of the object. For this it temporarily sets the change_mask to all
changes. Restore the previous state after this or else we might not
emit the right change_mask for the next listener.
Consider the case where one there are two listeners on an object.
The object emits a change and the first listener wants to enumerate the
changed params. For this is adds a new listener and then triggers the
enumeration. If we set the change_mask to 0 after adding the listener,
the second listener would get a 0 change_mask and fail to update
its state.
This replaces the manual check for "true" and some (inconsistent) return value
of atoi. All those instances now require either "true" or "1" to parse as
true, any other value (including NULL) is boolean false.
This way we can reset the dbus connection when we got a disconnect
and signal the event. This can then be used by the client to
do a new connection_get().
SPA_MEMBER is misleading, all we're doing here is pointer+offset and a
type-casting the result. Rename to SPA_PTROFF which is more expressive (and
has the same number of characters so we don't need to re-indent).
Set source user data for all dbus sources and set a destroy notify
when removed.
Remove the dbus user data to remove the source user data.
Clean up remaining sources when destoying a connection
Clean up remaining connections when freeing the dbus plugins.
Fixes#1114
Make info parsing a bit easier to read by assigning the key and
value to temporary variables.
Improve the parsing of channelmap using json parser to make it
support more cases.
Add a unit test for channelmap parsing options.
