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-rw-r--r--include/coverage.h25
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diff --git a/include/coverage.h b/include/coverage.h
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+++ b/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);
+__attribute__((noreturn)) void _exit(int);
+
+__attribute__((noreturn)) static inline void _coverage__exit(int status) {
+ __gcov_dump();
+ _exit(status);
+}
+#define _exit(x) _coverage__exit(x)
+
+#endif