Rework and simplify the "lcov" support for the testsuite.

[sliver-openvswitch.git] / tests / lcov-wrapper.in

diff --git a/tests/lcov-wrapper.in b/tests/lcov-wrapper.in
new file mode 100755 (executable)
index 0000000..1981cda
--- /dev/null
+++ b/tests/lcov-wrapper.in
@@ -0,0 +1,58 @@
+#! /bin/sh
+
+abs_top_builddir='@abs_top_builddir@'
+wrap_program=`basename '@wrap_program@'`
+
+# Strip the first directory from $PATH that contains $wrap_program,
+# so that below we run the real $wrap_program, not ourselves.
+not_found=true
+new_path=
+first=true
+save_IFS=$IFS
+IFS=:
+for dir in $PATH; do
+    IFS=$save_IFS
+    if $not_found && test -x "$dir/$wrap_program"; then
+        not_found=false
+    else
+        if $first; then
+            first=false
+            new_path=$dir
+        else
+            new_path=$new_path:$dir
+        fi
+    fi
+done
+IFS=$save_IFS
+if $not_found; then
+    echo "$0: error: cannot find $wrap_program in \$PATH" >&2
+    exit 1
+fi
+PATH=$new_path
+export PATH
+
+# XXX Probably want some kind of synchronization here to deal with
+# programs running in parallel.
+LCOV="lcov -b $abs_top_builddir -d $abs_top_builddir -q"
+$LCOV -z
+
+# Run the subprocess and propagate signals to it.
+for signal in 1 2 3 5 15; do
+    trap "kill -$signal \$!     # Propagate signal
+          trap - $signal        # Reset signal to default
+          wait                  # Wait for child to die
+          kill -$signal $$      # Kill ourselves with same signal
+          exit 1                # Exit in case 'kill' failed" $signal
+done
+$wrap_program 0<&0 "$@" &       # 0<&0 prevents shell from closing stdin
+exec 0</dev/null                # Don't hold stdin open unnecessarily
+wait $!; rc=$?
+
+# Run lcov, but only if some .gcda files were produced, since lcov
+# complains otherwise.
+for file in `find "$abs_top_builddir" -name '*.gcda'`; do
+    $LCOV -c -o - >> "$abs_top_builddir/tests/coverage.info"
+    break
+done
+
+exit $rc