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go/misc/cgo/testshared/testdata/gcdata/main/main.go
Bryan C. Mills a88575d662 Revert "cmd/go: remove support for -buildmode=shared"
This reverts CL 359096.

Updates #47788.

Reason for revert: -buildmode=shared may have actually been working in a few very specific cases. We should not remove -buildmode=shared until we have implemented an alternative to support those few cases.

Change-Id: Ia962b06abacc11f6f29fc29d092773be175e32f1
Reviewed-on: https://go-review.googlesource.com/c/go/+/359575
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2021-10-29 17:32:24 +00:00

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763 B
Go

// Copyright 2020 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.
// Test that GC data is generated correctly for global
// variables with types defined in a shared library.
// See issue 39927.
// This test run under GODEBUG=clobberfree=1. The check
// *x[i] == 12345 depends on this debug mode to clobber
// the value if the object is freed prematurely.
package main
import (
"fmt"
"runtime"
"testshared/gcdata/p"
)
var x p.T
func main() {
for i := range x {
x[i] = new(int)
*x[i] = 12345
}
runtime.GC()
runtime.GC()
runtime.GC()
for i := range x {
if *x[i] != 12345 {
fmt.Printf("x[%d] == %d, want 12345\n", i, *x[i])
panic("FAIL")
}
}
}