cmd/gc: offset 2147483649 too large for OINDREG

[bradfitz]

This:

package main

func main() {
        var buf [1<<31]byte
        buf[len(buf)-1] = 0
}

generates:

large.go:3: stack frame too large (>2GB)

If that's too large, why isn't it just heap-promoted?





This works fine:

package main

var ptr *byte

func main() {
        var buf [1<<31]byte
        buf[len(buf)-1] = 0
        ptr = &buf[0]
}




But this:

package main

/*

*/
import "C"

import "unsafe"

func main() {
        var buf [1<<31 + 2]byte
        for i := range buf {
                buf[i] = 'a'
        }
        buf[len(buf)-1] = 0  // ERROR: offset 2147483649 too large for OINDREG
        println(len(C.GoString((*C.char)(unsafe.Pointer(&buf[0])))))
}

Yields: x.go:15: offset 2147483649 too large for OINDREG

[bradfitz]

Comment 1:

The first example above is now fixed by:
cmd/gc: move large stack variables to heap
https://code.google.com/p/go/source/detail?r=29b6246f5a9c 
But "offset 2147483649 too large for OINDREG" remains.

[bradfitz]

Comment 2:

That is:
package main
func main() {
        var buf [1<<31 + 2]byte
        buf[len(buf)-1] = 0  // ERROR: offset 2147483649 too large for OINDREG                                
}

[remyoudompheng]

Comment 3:

https://golang.org/cl/12992043/

Status changed to Started.

[remyoudompheng]

Comment 4:

This issue was closed by revision 9c21ce5.

Status changed to Fixed.