1 files changed, 24 insertions, 4 deletions
diff --git a/common-main.c b/common-main.c
index 29fb745..c531372 100644
--- a/common-main.c
+++ b/common-main.c
@@ -55,10 +55,30 @@ int main(int argc, const char **argv)
 
 	result = cmd_main(argc, argv);
 
+	/* Not exit(3), but a wrapper calling our common_exit() */
+	exit(result);
+}
+
+static void check_bug_if_BUG(void)
+{
+	if (!bug_called_must_BUG)
+		return;
+	BUG("on exit(): had bug() call(s) in this process without explicit BUG_if_bug()");
+}
+
+/* We wrap exit() to call common_exit() in git-compat-util.h */
+int common_exit(const char *file, int line, int code)
+{
 	/*
-	 * We define exit() to call trace2_cmd_exit_fl() in
-	 * git-compat-util.h. Whether we reach this or exit()
-	 * elsewhere we'll always run our trace2 exit handler.
+	 * For non-POSIX systems: Take the lowest 8 bits of the "code"
+	 * to e.g. turn -1 into 255. On a POSIX system this is
+	 * redundant, see exit(3) and wait(2), but as it doesn't harm
+	 * anything there we don't need to guard this with an "ifdef".
 	 */
-	exit(result);
+	code &= 0xff;
+
+	check_bug_if_BUG();
+	trace2_cmd_exit_fl(file, line, code);
+
+	return code;
 }