#!/usr/bin/env bash
# Copyright 2015 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.

# For testing Android, this script requires adb to push and run compiled
# binaries on a target device.

set -e

if [ ! -f src/libgo/libgo.go ]; then
	cwd=$(pwd)
	echo 'misc/cgo/testcshared/test.bash is running in $cwd' 1>&2
	exit 1
fi

goos=$(go env GOOS)
goarch=$(go env GOARCH)
goroot=$(go env GOROOT)
if [ ! -d "$goroot" ]; then
	echo 'misc/cgo/testcshared/test.bash cannnot find GOROOT' 1>&2
	echo '$GOROOT:' "$GOROOT" 1>&2
	echo 'go env GOROOT:' "$goroot" 1>&2
	exit 1
fi

# Directory where cgo headers and outputs will be installed.
# The installation directory format varies depending on the platform.
installdir=pkg/${goos}_${goarch}_testcshared_shared
if [ "${goos}" == "darwin" ]; then
	installdir=pkg/${goos}_${goarch}_testcshared
fi

# Temporary directory on the android device.
androidpath=/data/local/tmp/testcshared-$$

function cleanup() {
	rm -f libgo.$libext libgo2.$libext libgo4.$libext libgo5.$libext
	rm -f libgo.h libgo4.h libgo5.h
	rm -f testp testp2 testp3 testp4 testp5
	rm -rf pkg "${goroot}/${installdir}"

	if [ "$goos" == "android" ]; then
		adb shell rm -rf "$androidpath"
	fi
}
trap cleanup EXIT

if [ "$goos" == "android" ]; then
	adb shell mkdir -p "$androidpath"
fi

function run() {
	case "$goos" in
	"android")
		local args=$@
		output=$(adb shell "cd ${androidpath}; $@")
		output=$(echo $output|tr -d '\r')
		case $output in
			*PASS) echo "PASS";; 
			*) echo "$output";;
		esac
		;;
	*)
		echo $(env $@)
		;;
	esac
}

function binpush() {
	bin=${1}
	if [ "$goos" == "android" ]; then
		adb push "$bin"  "${androidpath}/${bin}" 2>/dev/null
	fi
}

rm -rf pkg

suffix="-installsuffix testcshared"

libext="so"
if [ "$goos" == "darwin" ]; then
	libext="dylib"
fi

# Create the header files.
GOPATH=$(pwd) go install -buildmode=c-shared $suffix libgo

GOPATH=$(pwd) go build -buildmode=c-shared $suffix -o libgo.$libext src/libgo/libgo.go
binpush libgo.$libext

if [ "$goos" == "linux" ] || [ "$goos" == "android" ] ; then
    if readelf -d libgo.$libext | grep TEXTREL >/dev/null; then
        echo "libgo.$libext has TEXTREL set"
        exit 1
    fi
fi

GOGCCFLAGS=$(go env GOGCCFLAGS)
if [ "$goos" == "android" ]; then
	GOGCCFLAGS="${GOGCCFLAGS} -pie"
fi

status=0

# test0: exported symbols in shared lib are accessible.
# TODO(iant): using _shared here shouldn't really be necessary.
$(go env CC) ${GOGCCFLAGS} -I ${installdir} -o testp main0.c libgo.$libext
binpush testp

output=$(run LD_LIBRARY_PATH=. ./testp)
if [ "$output" != "PASS" ]; then
	echo "FAIL test0 got ${output}"
	status=1
fi

# test1: shared library can be dynamically loaded and exported symbols are accessible.
$(go env CC) ${GOGCCFLAGS} -o testp main1.c -ldl
binpush testp
output=$(run ./testp ./libgo.$libext)
if [ "$output" != "PASS" ]; then
	echo "FAIL test1 got ${output}"
	status=1
fi

# test2: tests libgo2 which does not export any functions.
GOPATH=$(pwd) go build -buildmode=c-shared $suffix -o libgo2.$libext libgo2
binpush libgo2.$libext
linkflags="-Wl,--no-as-needed"
if [ "$goos" == "darwin" ]; then
	linkflags=""
fi
$(go env CC) ${GOGCCFLAGS} -o testp2 main2.c $linkflags libgo2.$libext
binpush testp2
output=$(run LD_LIBRARY_PATH=. ./testp2)
if [ "$output" != "PASS" ]; then
	echo "FAIL test2 got ${output}"
	status=1
fi

# test3: tests main.main is exported on android.
if [ "$goos" == "android" ]; then
	$(go env CC) ${GOGCCFLAGS} -o testp3 main3.c -ldl
	binpush testp3
	output=$(run ./testp ./libgo.so)
	if [ "$output" != "PASS" ]; then
		echo "FAIL test3 got ${output}"
		status=1
	fi
fi

# test4: tests signal handlers
GOPATH=$(pwd) go build -buildmode=c-shared $suffix -o libgo4.$libext libgo4
binpush libgo4.$libext
$(go env CC) ${GOGCCFLAGS} -pthread -o testp4 main4.c -ldl
binpush testp4
output=$(run ./testp4 ./libgo4.$libext 2>&1)
if test "$output" != "PASS"; then
    echo "FAIL test4 got ${output}"
    if test "$goos" != "android"; then
	echo "re-running test4 in verbose mode"
	./testp4 ./libgo4.$libext verbose
    fi
    status=1
fi

# test5: tests signal handlers with os/signal.Notify
GOPATH=$(pwd) go build -buildmode=c-shared $suffix -o libgo5.$libext libgo5
binpush libgo5.$libext
$(go env CC) ${GOGCCFLAGS} -pthread -o testp5 main5.c -ldl
binpush testp5
output=$(run ./testp5 ./libgo5.$libext 2>&1)
if test "$output" != "PASS"; then
    echo "FAIL test5 got ${output}"
    if test "$goos" != "android"; then
	echo "re-running test5 in verbose mode"
	./testp5 ./libgo5.$libext verbose
    fi
    status=1
fi

if test $status = 0; then
    echo "ok"
fi

exit $status