garble/testdata/script/cgo.txtar

[!cgo] skip 'this test requires cgo to be enabled'

exec garble build
! stderr 'warning' # check that the C toolchain is happy
exec ./main
cmp stdout main.stdout
! binsubstr main$exe 'PortedField' 'test/main'

[short] stop # no need to verify this with -short

# Ensure that reversing works with cgo.
env GARBLE_TEST_REVERSING=true
exec ./main
cp stdout reversing.stdout
stdin reversing.stdout
exec garble reverse .
cmp stdout reversed.stdout
env GARBLE_TEST_REVERSING=false

exec garble -tiny build
exec ./main
cmp stdout main.stdout

go build
! stderr 'warning' # check that the C toolchain is happy
exec ./main
cmp stdout main.stdout
binsubstr main$exe 'privateAdd'
-- go.mod --
module test/main

go 1.22
-- main.go --
package main

func main() {
	regularFunc()
	cgoFunc()
}
-- regular_main.go --
package main

import (
	"fmt"
	"os"
	"runtime"
)

func regularFunc() {
	if os.Getenv("GARBLE_TEST_REVERSING") == "true" {
		_, filename, _, _ := runtime.Caller(0)
		fmt.Println("regular filename:", filename)
	}
}
-- cgo_main.go --
package main

import (
	"fmt"
	"os"
	"os/user"
	"runtime"
)

/*
#include "separate.h" // inline comment

static int privateAdd(int a, int b) {
	return a + b;
}

extern void goCallback();

static void callGoCallback() {
	goCallback();
	separateFunction();
}

struct portedStruct {
	char* PortedField;
};
*/
import "C"

func cgoFunc() {
	fmt.Println(C.privateAdd(C.int(1), C.int(2)))
	_, _ = user.Current()

	st := C.struct_portedStruct{}
	fmt.Println(st.PortedField == nil)

	C.callGoCallback()
}

//export goCallback
func goCallback() {
	fmt.Println("go callback")
	// TODO: support reversing filenames in cgo files
	if false && os.Getenv("GARBLE_TEST_REVERSING") == "true" {
		_, filename, _, _ := runtime.Caller(0)
		fmt.Println("cgo filename:", filename)
	}
}
-- separate.h --
void separateFunction();
-- separate.c --
#include "_cgo_export.h"

void separateFunction() {
	goCallback();
}
-- main.stdout --
3
true
go callback
go callback
-- reversed.stdout --
regular filename: test/main/regular_main.go
3
true
go callback
go callback