Fixes the following warnings when building with _FORTIFY_SOURCE
and optimizations enabled:
../shared/xalloc.h:49:9: error: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Werror=unused-result]
49 | write(STDERR_FILENO, oommsg, strlen(oommsg));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
or
../compositor/main.c:427:25: error: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Werror=unused-result]
427 | write(STDERR_FILENO, fail_seteuid,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
428 | strlen(fail_seteuid));
| ~~~~~~~~~~~~~~~~~~~~~
../compositor/main.c:434:25: error: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Werror=unused-result]
434 | write(STDERR_FILENO, fail_cloexec,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
435 | strlen(fail_cloexec));
| ~~~~~~~~~~~~~~~~~~~~~
../compositor/main.c:442:25: error: ignoring return value of ‘write’ declared with attribute ‘warn_unused_result’ [-Werror=unused-result]
442 | write(STDERR_FILENO, fail_exec, strlen(fail_exec));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
The definition of zalloc is trivial, so let's just have it here instead
of loading libweston/zalloc.h.
Now xalloc.h does not depend on any libweston header, which makes me
feel slightly better. It's more clean.
Who knows, maybe one day libweston/zalloc.h will be removed.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Recently I learnt that fprintf() is not async-signal-safe. Maybe it also
attempts to allocate memory sometimes. Hence, using it when we
presumably are out of memory is wishful thinking.
Therefore replace that with async-signal-safe code. If you have to check
pointers from traditional signal handlers, now you could do that too!
While doing this, we also lose the string formatting for line number. I
would argue that printing file and line number is not that useful, if
the system really is out of memory. If not out of memory, a core dump
would give us much more detailed information about what went wrong.
clients/window.c had some calls to fail_on_null() and these are simply
replaced. They were used for checking that creating new wl_proxy by
issuing a protocol request worked, and IIRC that only fails on
out-of-memory, so the same rationale applies here.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Drop the even more home-grown alloc wrapper and use the xalloc.h
wrappers directly.
xcalloc() is added and used, because calloc() will detect integer
overflows in the size multiplication, while doing a simple
multiplication in the caller is subject to overflows which may result in
allocating not what was expected, subjecting to out-of-bounds access.
All MEM_ALLOC() calls that had a meaningful multiplication in them were
converted to xcalloc(), the rest to xzalloc().
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Make fail_on_null static inline and put it in xalloc.h so we can use the
header exclusively instead of having to link with the library for it.
This is so we can use xalloc in places (like the RDP backend) without
having to bring in libshared.
Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
It is a public installed header used by libweston.h.
See "Rename compositor.h to libweston/libweston.h" for rationale.
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Switches from inline to pre-processor definitions in order to utilize
__FILE__ and __LINE__ from the .c file in order to display the location
of memory allocation failures when failing.
Now xmalloc, et al calls will produce:
[weston-info] clients/weston-info.c:714: out of memory (1024)
Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Direct fail_on_null calls now produce output like:
[weston-info] clients/weston-info.c:714: out of memory
xmalloc, et al produce output on failure like:
[weston-info] out of memory (-1)
Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
