godefs: rudimentary tests

currently only defined for darwin

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/4528123

src/cmd/godefs/Makefile

@@ -14,3 +14,6 @@ OFILES=\
 HFILES=a.h
 
 include ../../Make.ccmd
+
+test: $(TARG)
+	./test.sh

src/cmd/godefs/test.sh

+#!/usr/bin/env bash
+# Copyright 2011 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+eval $(gomake --no-print-directory -f ../../Make.inc go-env)
+
+TMP="testdata_tmp.go"
+TEST="testdata.c"
+GOLDEN="testdata_${GOOS}_${GOARCH}.golden"
+
+case ${GOARCH} in
+"amd64") CCARG="-f-m64";;
+"386") CCARG="-f-m32";;
+*) CCARG="";;
+esac
+
+cleanup() {
+	rm ${TMP}
+}
+
+error() {
+	cleanup
+	echo $1
+	exit 1
+}
+
+if [ ! -e ${GOLDEN} ]; then
+	echo "skipping - no golden defined for this platform"
+	exit
+fi
+
+./godefs -g test ${CCARG} ${TEST} > ${TMP}
+if [ $? != 0 ]; then
+	error "Error: Could not run godefs for ${TEST}"
+fi
+
+diff ${TMP} ${GOLDEN}
+if [ $? != 0 ]; then
+	error "FAIL: godefs for ${TEST} did not match ${GOLDEN}"
+fi
+
+cleanup
+
+echo "PASS"

src/cmd/godefs/testdata.c

+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include <stdint.h>
+
+// Issue 432 - enum fields in struct can cause misaligned struct fields
+typedef enum {
+	a
+} T1;
+
+struct T2 {
+	uint8_t a;
+	T1 b;
+	T1 c;
+	uint16_t d;
+};
+
+typedef struct T2 T2;
+typedef T2 $T2;
+
+// Issue 1162 - structs with fields named Pad[0-9]+ conflict with field
+// names used by godefs for padding
+struct T3 {
+	uint8_t a;
+	int Pad0;
+};
+
+typedef struct T3 $T3;
+
+// Issue 1466 - forward references to types in stabs debug info were
+// always treated as enums
+struct T4 {};
+
+struct T5 {
+	struct T4 *a;
+};
+
+typedef struct T5 T5;
+typedef struct T4 $T4;
+typedef T5 $T5;
\ No newline at end of file

src/cmd/godefs/testdata_darwin_386.golden

+// ./godefs -g test -f-m32 testdata.c
+
+// MACHINE GENERATED - DO NOT EDIT.
+
+package test
+
+// Constants
+
+// Types
+
+type T2 struct {
+	A uint8;
+	Pad_godefs_0 [3]byte;
+	B uint32;
+	C uint32;
+	D uint16;
+	Pad_godefs_1 [2]byte;
+}
+
+type T3 struct {
+	A uint8;
+	Pad_godefs_0 [3]byte;
+	Pad0 int32;
+}
+
+type T4 struct {
+}
+
+type T5 struct {
+	A *T4;
+}

src/cmd/godefs/testdata_darwin_amd64.golden

+// ./godefs -g test -f-m64 testdata.c
+
+// MACHINE GENERATED - DO NOT EDIT.
+
+package test
+
+// Constants
+
+// Types
+
+type T2 struct {
+	A uint8;
+	Pad_godefs_0 [3]byte;
+	B uint32;
+	C uint32;
+	D uint16;
+	Pad_godefs_1 [2]byte;
+}
+
+type T3 struct {
+	A uint8;
+	Pad_godefs_0 [3]byte;
+	Pad0 int32;
+}
+
+type T4 struct {
+}
+
+type T5 struct {
+	A *T4;
+}

src/run.bash

@@ -49,6 +49,10 @@ GOMAXPROCS=10 gomake testshort
 time gomake test
 ) || exit $?
 
+(xcd cmd/godefs
+gomake test
+) || exit $?
+
 [ "$GOARCH" == arm ] ||
 [ "$GOHOSTOS" == windows ] ||
 (xcd ../misc/cgo/stdio