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go/test/fixedbugs/issue4348.go
Cherry Zhang c9c64886ef cmd/internal/obj: reject too large symbols
We never supported symbol larger than 2GB (issue #9862), so the
object file uses 32-bit for symbol sizes. Check and reject too
large symbol before truncating its size.

Fixes #42054.

Change-Id: I0d1d585ebdba9556f2fd3a97043bd4296d5cc9e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/263641
Trust: Cherry Zhang <cherryyz@google.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
2020-10-20 18:51:03 +00:00

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584 B
Go

// skip
// Copyright 2012 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.
// Issue 4348. After switch to 64-bit ints the compiler generates
// illegal instructions when using large array bounds or indexes.
// Skip. We reject symbols larger that 2GB (Issue #9862).
package main
// 1<<32 on a 64-bit machine, 1 otherwise.
const LARGE = ^uint(0)>>32 + 1
func A() int {
var a []int
return a[LARGE]
}
var b [LARGE]int
func B(i int) int {
return b[i]
}
func main() {
n := A()
B(n)
}