util-linux/include/coverage.h

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/*
* No copyright is claimed. This code is in the public domain; do with
* it what you wish.
*/
#ifndef UTIL_LINUX_COVERAGE_H
#define UTIL_LINUX_COVERAGE_H
/* When built with --coverage (gcov) we need to explicitly call __gcov_dump()
* in places where we use _exit(), since _exit() skips at-exit hooks resulting
* in lost coverage.
*
* To make sure we don't miss any _exit() calls, this header file is included
* explicitly on the compiler command line via the -include directive (only
* when built with --coverage/-Db_coverage=true)
*/
void __gcov_dump(void);
void _exit(int);
__attribute__((noreturn)) static inline void _coverage__exit(int status) {
__gcov_dump();
_exit(status);
}
#define _exit(x) _coverage__exit(x)
#endif