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macro: call __gcov_dump() before _exit() w/ coverage enabled

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_exit() skips at-exit hooks, causing lost coverage from processes
utilizing it.

Hopefully resolves systemd/systemd-centos-ci#482
This commit is contained in:
Frantisek Sumsal 2022-04-06 19:41:01 +02:00
parent 80b7f7118e
commit c6552ad381
2 changed files with 16 additions and 0 deletions
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3
meson.build
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@ -47,6 +47,9 @@ fuzzer_build = want_ossfuzz or want_libfuzzer
# More items are added later after they have been detected.
summary({'build mode' : get_option('mode')})
# GCOV doesn't define any macro when compiled with, so let's define it ourselves
conf.set10('BUILT_WITH_COVERAGE', get_option('b_coverage'))
#####################################################################
# Try to install the git pre-commit hook

13
src/basic/macro.h
View file

@ -29,6 +29,19 @@
#define _alignptr_ __attribute__((__aligned__(sizeof(void*))))
#define _warn_unused_result_ __attribute__((__warn_unused_result__))
#if defined(BUILT_WITH_COVERAGE) && BUILT_WITH_COVERAGE
/* We need to explicitly call __gcov_dump() in places where we use _exit(), since
* _exit() skips at-exit hooks resulting in lost coverage */
# include <unistd.h>
extern void __gcov_dump(void);
_noreturn_ static inline void _coverage__exit(int status) {
__gcov_dump();
_exit(status);
}
# define _exit(x) _coverage__exit(x)
#endif
#if !defined(HAS_FEATURE_MEMORY_SANITIZER)
# if defined(__has_feature)
# if __has_feature(memory_sanitizer)