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garble/testdata/script/cgo.txtar

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[!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 1.23
-- main.go --
package main
// It's important that the main package only has files importing "C",
// as that used to trigger https://github.com/burrowers/garble/issues/916.
import "C"
import "test/main/imported"
func main() {
imported.RegularFunc()
cgoFunc()
}
-- imported/imported_regular.go --
package imported
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 callGoCallbacks() {
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.callGoCallbacks()
}
//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)
}
}
//export printString
func printString(cs *C.char) {
fmt.Println(C.GoString(cs))
}
-- separate.h --
void separateFunction();
-- separate.c --
#include "_cgo_export.h"
#include <stdio.h>
void separateFunction() {
goCallback();
printString("string from C");
}
-- main.stdout --
3
true
go callback
go callback
string from C
-- reversed.stdout --
regular filename: test/main/imported/imported_regular.go
3
true
go callback
go callback
string from C