package main

// Test passing C struct to exported Go function.

/*
#include <stdint.h>

typedef struct { uintptr_t x, y; char b; } T;

void CF(int x);
*/
import "C"

//export F
func F(t C.T) { println(t.x, t.y, t.b) }

func main() {
	C.CF(C.int(0))
}

#include <stdint.h>
#include <stdlib.h>

typedef struct { uintptr_t x, y; char b; } T;

extern void F(T);

void CF(int x) {
	T *t = malloc(sizeof(T));
	t->x = x;
	t->y = x;
	t->b = (char)x;
	F(*t);
}

$ CC=clang go build -msan .
$ ./x
Uninitialized bytes in __msan_check_mem_is_initialized at offset 17 inside [0x7fff51f33f00, 24)
==893435==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x4f5368 in msancall /usr/local/google/home/cherryyz/src/go-tip/src/runtime/msan_amd64.s:78

SUMMARY: MemorySanitizer: use-of-uninitialized-value /usr/local/google/home/cherryyz/src/go-tip/src/runtime/msan_amd64.s:78 in msancall
Exiting