fb58d55187dfe1565d10c0c0ffdbaa85376cf0b8 added weak linking for ASAN,
skipping it for MinGW because weak symbols are broken there.
The same is true for Cygwin, so skip things there too.
This fixes the following build error under MSYS2:
/usr/lib/gcc/x86_64-pc-msys/13.3.0/../../../../x86_64-pc-msys/bin/ld:
glib/msys-glib-2.0-0.dll.p/gutils.c.o:gutils.c:
(.rdata$.refptr.__lsan_enable[.refptr.__lsan_enable]+0x0): undefined reference to `__lsan_enable'
While an index greater than `G_MAXINT` can’t be passed to
`g_ptr_array_insert()`, `-1` can be — and if that’s done with an array
which has more than `G_MAXINT` elements in it, the new element will be
inserted part-way through the array rather than being appended.
Spotted by building with `-Wsign-conversion`.
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #3405
The latter only accepts a `gint` as the number of elements in the array,
which means that its use in `GArray` (and related array implementations)
truncates at least half the potential array size.
So, introduce a replacement for it which uses `size_t` for the number of
elements. This is inline with what `qsort()` (or `qsort_r()`) actually
does. Unfortunately we can’t directly use `qsort_r()` because it’s not
guaranteed to be a stable sort.
This fixes some `-Wsign-conversion` warnings (when building GLib with
that enabled).
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #3405
Commit 9dad94e7q ensured `test_data` is freed when a test is skipped,
but didn't ensure that when a whole test suite is skipped.
We are assuming the ownership of `test_data` is passed to GTestCase
with `g_test_add_data_func_full()` so free `test_data` always when
freeing a test case.
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
gmacros.h casts functions to GDestroyNotify, which prevents enabling the
following hardening options in applications: -fsanitize=address
-fsanitize=cfi-icall (without -fsanitize-cfi-icall-generalize-pointers),
and -Wcast-function-type-strict.
Define another inline function that warps the original function into
GDestroyNotify.
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
We have required C99 for a while; in the meantime, most C toolchains
have moved on to C11 or later as the default C standard.
We still allow for C99 toolchains, but in the future we are going to
require a C11 toolchain to build and use GLib.
Some of these are properties of a Standard C or POSIX platform that
are true by definition and checked for completeness (for example intptr_t
is defined to be signed, and uintptr_t unsigned), while others are
checking that GLib's type detection has been done correctly.
Signed-off-by: Simon McVittie <smcv@debian.org>
Neither the new nftw()-based rm_rf() implementation, nor the fallback
implementation, should fail the test if there is an error during cleanup
of the directory tree. And the output on stderr that the nftw()-based
implementation emits should not interfere with Meson parsing the TAP
stream on stdout.
The test is run in a subprocess so that we can clean up after ourselves.
Previously, when cleaning up the temporary directory tree created by
passing G_TEST_OPTION_ISOLATE_DIRS, any symbolic links in that tree
would be followed recursively. If the test case has created a symbolic
link in its temporary directory to a directory outside that tree, this
could lead to unexpected data loss; in particular, if the test case
author has (unwisely) created a symbolic link to /, they could lose all
data on the system.
On systems that have the ftw.h header, replace the current rm_rf()
implementation with one that uses nftw() to perform a depth-first
traversal (FTW_DEPTH) without following symbolic links (FTW_PHYS), and
without crossing mount points (FTW_MOUNT) in case a test has mounted
some other filesystem in the temporary directory.
The callback logs any error to the standard error stream, but returns 0
rather than -1 to allow nftw() to keep walking the tree rather than
terminating immediately. Suppose we are trying to clean up the following
tree:
tmpdir/
a/
f/ (directory not readable for some reason)
g/
p
b/
c
d
Since tmpdir/a/f is not readable, we can expect to fail to delete
tmpdir/a/f, tmpdir/a and tmpdir; but it is preferable to (attempt) to
delete the rest of the tree rather than failing outright. The cost is
that three errors will be logged (for tmpdir/a/f, tmpdir/a and tmpdir).
nftw() is part of POSIX.1-2001, SUSv1, and glibc ≥ 2.1, so should be
available on effectively every platform except Windows. (And Windows
does not enable symbolic links by default so the developer error is less
likely to occur there.)
The macOS ftw(3) manpage says:
> These functions are provided for compatibility with legacy code. New
> code should use the fts(3) functions.
fts(3) does not seem to be part of any standard, but it does seem to be
equally widely supported. The Linux manpages do not indicate that
nftw() is deprecated.
Fixes: https://gitlab.gnome.org/GNOME/glib/-/issues/3290
Do not try to inject the C standard into `c_args`: Meson already
generates a compiler command line with the appropriate C standard, and
adding another one into it at a random position is either potentially
undefined behaviour, or it's going to break the build because the
compiler does not accept more than one switch.
Meson has an `override_options` argument for the executable() object,
and we are already using it in places.
GVariant Text Format section on bytestrings links to `g_strcompress`
but what it does was only briefly described in the header file,
which is not visible in the gi-docgen-built reference. To really
find out one would have to guess to continue through the rabbit hole
to `g_strescape`.
Let’s merge the description from the header and elaborate on it a bit.
Saying that it inserts a backslash before special character is incorrect
for anything but a double quote and backslash itself. Instead, it replaces
the special characters with a C escape sequence.
Let’s fix that and also make it less C focused by using Unicode names
of the characters instead of assuming everyone knows C escape sequences
by heart.
GCC 14 now emits this warning with the tests:
```
In file included from ../glib/gthread.h:34,
from ../glib/gasyncqueue.h:34,
from ../glib/glib.h:34,
from ../glib/tests/atomic.c:14:
../glib/tests/atomic.c: In function 'test_types':
../glib/gatomic.h:140:5: error: argument 2 of '__atomic_store' discards 'volatile' qualifier [-Werror=discarded-qualifiers]
140 | __atomic_store (gaps_temp_atomic, &gaps_temp_newval, __ATOMIC_SEQ_CST); \
| ^~~~~~~~~~~~~~
../glib/tests/atomic.c:139:3: note: in expansion of macro 'g_atomic_pointer_set'
139 | g_atomic_pointer_set (&vp_str_vol, NULL);
| ^~~~~~~~~~~~~~~~~~~~
cc1.exe: all warnings being treated as errors
```
I can’t think of a way to cast around this in the definition of
`g_atomic_pointer_set()` without making the behaviour worse (less type
safe) for modern non-volatile atomic variables.
We would like to strongly nudge users of GLib away from declaring atomic
variables as `volatile`, so letting another compiler warning be emitted
when they do is not the end of the world. As long as it doesn’t stop old
code compiling (without `-Werror`).
Signed-off-by: Philip Withnall <pwithnall@gnome.org>
When running the alternate stack tests under valgrind the stack memory
gets corrupted that we've initialized gets somehow corrupted and this
causes a read-error while reading the stack memory area.
No matter if we use instead malloc-allocated or mmap'ed memory areas,
the result is always the same: a memory error while reading it.
Reading byte 2645
Reading byte 2646
Reading byte 2647
Reading byte 2648
==46100== Invalid read of size 1
Now this memory is definitely stack-allocated and unless the valgrind
stack gets corrupted, there's no way it could have been removed.
I quite trust that this is some valgrind problem only though since no
other memory analyzer I've tried (memory sanitizer mostly) has
highlighted any issue with this.
As per this, since the main point of the test was just checking if
signals are delivered properly even when using an alternate stack, I
think that we can just safely run a simpler version of the test when
running under valgrind. This implies assuming that sigaltstack()
does what is supposed to do, without us double-checking it, but I guess
we can trust that (especially because we're still testing it when not
using valgrind).
Closes: #3337
Some architecture such as sparc and some flavors of arm needs -latomic
to avoid the following build failure:
gthread-posix.c:(.text+0xda8): undefined reference to `__atomic_compare_exchange_4'
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
