In case we're out of memory we should abort after having printed an error
message, this is similar to crashing but not exactly the same, so ensure
we exit for SIGABRT and not because of a SIGSEV.
We use a test wrapper to ensure that both the exit code and the stderr
match what we expected.
During tests in which we are isolating directories, we may still create
temporary files in the global temporary directory without cleaning them
because the value returned by g_get_tmp_dir() is cached when we isolate
the tests directory to the global TMPDIR.
To ensure that we're always isolating the temporary directories, let's
unset the cached temporary directory once we've defined $G_TEST_TMPDIR
so that the returned value of g_get_tmpdir() can be recomputed using the
test isolated temporary directory.
This prevents stalls/deadlocks/timeouts on macOS. I don’t know why, as I
don’t have access to a macOS machine to test — this MR was put together
via testing on CI.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
This regressed in commit 9f558a2c50.
Not sure if it makes a functional difference to the test, though.
Signed-off-by: Philip Withnall <pwithnall@endlessos.org>
We can get a "-Wcast-align", if the target type that we cast to ("ct") has a
larger alignment than GTypeInstance.
That can happen on i686 architecture, if the GObject type has larger
alignment than the parent struct (or GObject). Since on i686, embeding
a "long long" or a "long double" in a struct still does not increase
the alignment beyond 4 bytes, this usually only happens when using the
__attribute__() to increase the alignment (or to have a field that has
the alignment increased).
It can happen on x86_64 when having a "long double" field.
The compiler warning is hard to avoid but not very useful, because it purely
operates on the pointer types at compile time. G_TYPE_CHECK_INSTANCE_CAST()
instead asserts (in non-optimized mode) that the pointer really points
to the expected GTypeInstance (and if that's the case, then the alignment
should be suitable already).
This is like in commit ed553e8e30 ('gtype: Eliminate -Wcast-align warnings
with G_TYPE_CHECK_INSTANCE_CAST'). But also fix the optimized code path.
With the unpatched G_TYPE_CHECK_INSTANCE_CAST() macro, the unit test would
now show the problem (with gcc-9.3.1-2.fc30.i686 or
gcc-12.2.1-4.fc37.x86_64):
$ export G_DISABLE_CAST_CHECKS=1
$ export CFLAGS='-Wcast-align=strict'
$ meson build
$ ninja -C build
...
In file included from ../gobject/gobject.h:26,
from ../gobject/gbinding.h:31,
from ../glib/glib-object.h:24,
from ../gobject/tests/objects-refcount1.c:2:
../gobject/tests/objects-refcount1.c: In function ‘my_test_dispose’:
../gobject/gtype.h:2523:42: warning: cast increases required alignment of target type [-Wcast-align]
2523 | # define _G_TYPE_CIC(ip, gt, ct) ((ct*) ip)
| ^
../gobject/gtype.h:517:66: note: in expansion of macro ‘_G_TYPE_CIC’
517 | #define G_TYPE_CHECK_INSTANCE_CAST(instance, g_type, c_type) (_G_TYPE_CIC ((instance), (g_type), c_type))
| ^~~~~~~~~~~
../gobject/tests/objects-refcount1.c:9:37: note: in expansion of macro ‘G_TYPE_CHECK_INSTANCE_CAST’
9 | #define MY_TEST(test) (G_TYPE_CHECK_INSTANCE_CAST ((test), G_TYPE_TEST, GTest))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gobject/tests/objects-refcount1.c:96:10: note: in expansion of macro ‘MY_TEST’
96 | test = MY_TEST (object);
| ^~~~~~~
It has always been considered an unsigned value, and we also returned it
straight as int in g_hash_table_size(), but it was actually used as an
int.
So use the same type of g_hash_table_size(). Not using more standard
unsigned not to risk that it may different from the guint typedef.
We eventually need to return them as an array anyways.
Sadly we can't just reuse such memory because each element is a pointer and
not a guchar, but still we can be cheaper in various operations.
Add functions to steal all the keys or values from a ghash (especially
useful when it's used as a set), passing the ownership of then to a
GPtrArray container that preserves the destroy notify functions.
GPtrArray's are faster than lists and provide more flexibility, so add
APIs to get hash keys and values using these containers too.
Given that we know the size at array initialization we can optimize the
allocation quite a bit, making it faster than the API using GList both at
creation time and for consumers.
GArray's g_array_append_val(), g_array_prened_val() and g_array_insert_val()
macros required an user to use literals to add a new value.
This could be inconvenient at times, but it's possible to avoid this with
recent compilers, in fact in case glib_typeof is defined we can take
advantage of it, to initialize a temporary variable to store the literal
value and pass its address to the actual function.
The array of offsets is little-endian, even on big-endian architectures
like s390x.
Fixes: ade71fb5 "gvariant: Don’t allow child elements to overlap with each other"
Resolves: https://gitlab.gnome.org/GNOME/glib/-/issues/2839
Signed-off-by: Simon McVittie <smcv@collabora.com>
I noticed this when running the test on an Arm Morello system where varargs
have bounds. g_variant_new() was trying to read an integer using va_arg(),
but since there was no argument it resulted in a bounds errors there.
On most other architectures this will just read whatever value is contained
in the next argument register and is not something that ASan can detect, so
it never resulted in test failures.
posix_memalign() requires the alignment to be a multiple of sizeof(void*),
and a power of 2. Passing 8 does not fulfil both of those constraints on
Arm Morello which resulted in a "posix_memalign failed" test failure.
Co-authored-by: Graeme Jenkinson <graeme@capabilitieslimited.co.uk>
