| Commit message (Collapse) | Author | Age |
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Instead of wrapping every gcov function call in an ifdef.
Note: The usage of `((void)0)` is based on section 7.2 of the C99
standard (N1256)[1] [2]:
> 7.2 Diagnostics <assert.h>
>
> 1 The header <assert.h> defines the assert macro and refers to another
> macro,
>
> NDEBUG
>
> which is not defined by <assert.h>. If NDEBUG is defined as a macro
> name at the point in the source file where <assert.h> is included, the
> assert macro is defined simply as
>
> #define assert(ignore) ((void)0)
See also assert.h(0p) from POSIX.1-2017[3].
Note: This is a continuation of commit b408b20c7 ("gcov: fix build
failure with gcc 11.1.0") / PR #4373.
[1] http://www.open-std.org/JTC1/SC22/WG14/www/docs/n1256.pdf
[2] https://port70.net/~nsz/c/c99/n1256.html#7.2
[3] https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/assert.h.html
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The build currently fails if gcov support is enabled:
$ pacman -Q gcc
gcc 11.1.0-1
$ ./configure --prefix=/usr --enable-apparmor --enable-gcov >/dev/null
$ make >/dev/null
[...]
netstats.c: In function ‘netstats’:
netstats.c:250:25: warning: implicit declaration of function ‘__gcov_flush’; did you mean ‘__gcov_dump’? [-Wimplicit-function-declaration]
250 | __gcov_flush();
| ^~~~~~~~~~~~
| __gcov_dump
[...]
/usr/bin/ld: netstats.o: in function `netstats':
/tmp/firejail-git/src/firejail-git/src/firemon/netstats.c:250: undefined reference to `__gcov_flush'
[...]
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:10: firemon] Error 1
make: *** [Makefile:42: src/firemon/firemon] Error 2
[...]
This happens because __gcov_flush was removed on gcc 11.1.0[1] [2] [3].
See the following gcc commits:
* d39f7dc8d5 ("Do locking for __gcov_dump and __gcov_reset as well.")
* c0532db47d ("Use __gcov_dump and __gcov_reset in execv and fork context.")
* 811b7636cb ("Remove __gcov_flush.")
Its implementation did the following[4]:
__gcov_lock ();
__gcov_dump_int ();
__gcov_reset_int ();
__gcov_unlock ();
As hinted in the commit messages above, the function is no longer needed
because locking is now done inside each of __gcov_dump and __gcov_reset.
So add an implementation of __gcov_flush (on a new gcov_wrapper.h file)
for gcc >= 11.1.0, which just calls __gcov_dump and then __gcov_reset.
Commands used to search and replace:
$ git grep -Flz '#include <gcov.h>' -- '*.c' |
xargs -0 -I '{}' sh -c \
"printf '%s\n' \"\`sed 's|<gcov\\.h>|\"../include/gcov_wrapper.h\"|' '{}'\`\" >'{}'"
Note: This is the continuation of commit 31557e9c7 ("gcov: add missing
gcov.h includes") / PR #4360.
[1] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=d39f7dc8d558ca31a661b02d08ff090ce65e6652
[2] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=c0532db47d092430f8e8f497b2dc53343527bb13
[3] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=811b7636cb8c10f1a550a76242b5666c7ae36da2
[4] https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=libgcc/libgcov-interface.c;h=855e8612018d1c9caf90396a3271337aaefdb9b3#l86
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Fixes the following "implicit declaration" warning (13 occurrences in
total) when building with gcov support:
$ pacman -Q gcc10
gcc10 1:10.2.0-3
$ CC=gcc-10 && export CC
$ ./configure --prefix=/usr --enable-apparmor --enable-gcov >/dev/null
$ make >/dev/null
appimage.c: In function ‘appimage_set’:
appimage.c:140:2: warning: implicit declaration of function ‘__gcov_flush’ [-Wimplicit-function-declaration]
140 | __gcov_flush();
| ^~~~~~~~~~~~
interface.c: In function ‘print_sandbox’:
interface.c:149:3: warning: implicit declaration of function ‘__gcov_flush’ [-Wimplicit-function-declaration]
149 | __gcov_flush();
| ^~~~~~~~~~~~
netstats.c: In function ‘netstats’:
netstats.c:246:4: warning: implicit declaration of function ‘__gcov_flush’ [-Wimplicit-function-declaration]
246 | __gcov_flush();
| ^~~~~~~~~~~~
[...]
Note: The commands above were executed from makepkg, while building
firejail-git from the AUR.
Note2: gcc-10 was used because the build fails with the current gcc
version (11.1.0) on Artix Linux. The failure happens because
__gcov_flush was removed on gcc 11.1.0[1]; this will be addressed later.
Note3: The following command helped find the affected files:
$ git grep -Fl __gcov -- src
[1] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=811b7636cb8c10f1a550a76242b5666c7ae36da2
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System calls (names and numbers) are not exactly the same for 32 bit
and 64 bit architectures. Let's allow defining separate filters for
32-bit arch using seccomp.32, seccomp.32.drop, seccomp.32.keep. This
is useful for mixed 64/32 bit application environments like Steam and
Wine.
Implement protocol and mdwx filtering also for 32 bit arch. It's still
better to block secondary archs completely if not needed.
Lists of supported system calls are also updated.
Warn if preload libraries would be needed due to trace, tracelog or
postexecseccomp (seccomp.drop=execve etc), because a 32-bit dynamic
linker does not understand the 64 bit preload libraries.
Closes #3267.
Signed-off-by: Topi Miettinen <toiwoton@gmail.com>
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* move copyright statement to 2020
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Found using `codespell -q 3 -L shotcut,objext,als,ans,creat,varius,chage,tthe`
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