1 files changed, 36 insertions, 0 deletions
diff --git a/testsuite/dwz.tests/cycle.sh b/testsuite/dwz.tests/cycle.sh
new file mode 100644
index 0000000..ce42521
--- /dev/null
+++ b/testsuite/dwz.tests/cycle.sh
@@ -0,0 +1,36 @@
+readelf_flags=""
+if readelf -h 2>&1 | grep -q "\-wN"; then
+    readelf_flags=-wN
+fi
+
+cp $execs/cycle 1
+
+# Using mode 3 in checksum_die_ref.
+$execs/dwz-for-test 1 -o 1.z --devel-dump-dies 2> DUMP.1
+rm -f 1.z
+
+# Skipping mode 3 in checksum_die_ref.
+$execs/dwz-for-test 1 -o 1.z --devel-dump-dies --devel-no-checksum-cycle-opt 2> DUMP.2
+rm -f 1.z
+
+# Verify that mode 3 and mode 4 have different checksums.
+grep " s structure_type" DUMP.1 > LINE.1
+grep " s structure_type" DUMP.2 > LINE.2
+! diff -q LINE.1 LINE.2
+rm -f DUMP.1 DUMP.2 LINE.1 LINE.2
+
+# Verify that dwz actually works with --devel-no-checksum-cycle-opt.
+cp 1 2
+$execs/dwz-for-test -m 3 1 2 --devel-no-checksum-cycle-opt --devel-ignore-size
+
+cnt=$(readelf -wi 3 | grep -c "DW_AT_name.*: s$")
+[ $cnt -eq 1 ]
+
+# Even with -wN readelf 2.38-15.fc37 follows and prints the contents
+# of the alt file. So make sure it cannot do that by removing it.
+rm 3
+
+cnt=$(readelf -wi $readelf_flags 1 | grep -c "DW_AT_name.*: s$" || true)
+[ $cnt -eq 0 ]
+
+rm -f 1 2 3