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author | 2021-06-15 16:17:56 -0300 | |
---|---|---|
committer | 2021-06-25 17:00:35 -0300 | |
commit | b408b20c70816ed16ed6343e36af3f9d26976752 (patch) | |
tree | de10b7793095605b3ee2ee6deae65e273c76d9e7 /src/include | |
parent | gcov: add missing gcov.h includes (diff) | |
download | firejail-b408b20c70816ed16ed6343e36af3f9d26976752.tar.gz firejail-b408b20c70816ed16ed6343e36af3f9d26976752.tar.zst firejail-b408b20c70816ed16ed6343e36af3f9d26976752.zip |
gcov: fix build failure with gcc 11.1.0
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
Diffstat (limited to 'src/include')
-rw-r--r-- | src/include/gcov_wrapper.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/include/gcov_wrapper.h b/src/include/gcov_wrapper.h new file mode 100644 index 000000000..2f409309d --- /dev/null +++ b/src/include/gcov_wrapper.h | |||
@@ -0,0 +1,40 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2021 Firejail Authors | ||
3 | * | ||
4 | * This file is part of firejail project | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License as published by | ||
8 | * the Free Software Foundation; either version 2 of the License, or | ||
9 | * (at your option) any later version. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU General Public License along | ||
17 | * with this program; if not, write to the Free Software Foundation, Inc., | ||
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
19 | */ | ||
20 | |||
21 | #ifndef GCOV_WRAPPER_H | ||
22 | #define GCOV_WRAPPER_H | ||
23 | |||
24 | #include <gcov.h> | ||
25 | |||
26 | /* | ||
27 | * __gcov_flush was removed on gcc 11.1.0 (as it's no longer needed), but it | ||
28 | * appears to be the safe/"correct" way to do things on previous versions (as | ||
29 | * it ensured proper locking, which is now done elsewhere). Thus, keep using | ||
30 | * it in the code and ensure that it exists, in order to support gcc <11.1.0 | ||
31 | * and gcc >=11.1.0, respectively. | ||
32 | */ | ||
33 | #if __GNUC__ > 11 || (__GNUC__ == 11 && __GNUC_MINOR__ >= 1) | ||
34 | static void __gcov_flush(void) { | ||
35 | __gcov_dump(); | ||
36 | __gcov_reset(); | ||
37 | } | ||
38 | #endif | ||
39 | |||
40 | #endif /* GCOV_WRAPPER_H */ | ||