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cmd/compile, runtime: make the go.itab.* symbols module-local

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Otherwise, the way the ELF dynamic linker works means that you can end up with
the same itab being passed to additab twice, leading to the itab linked list
having a cycle in it. Add a test to additab in runtime to catch this when it
happens, not some arbitrary and surprsing time later.

Fixes #17594

Change-Id: I6c82edcc9ac88ac188d1185370242dc92f46b1ad
Reviewed-on: https://go-review.googlesource.com/32131
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Michael Hudson-Doyle 2016-10-26 15:57:58 +13:00
parent aabdb66d89
commit 8b07ec20f7
4 changed files with 21 additions and 2 deletions
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9
misc/cgo/testshared/src/depBase/dep.go
View file

@ -1,5 +1,10 @@
package depBase
import (
"os"
"reflect"
)
var V int = 1
var HasMask []string = []string{"hi"}
@ -13,6 +18,10 @@ type Dep struct {
}
func (d *Dep) Method() int {
// This code below causes various go.itab.* symbols to be generated in
// the shared library. Similar code in ../exe/exe.go results in
// exercising https://github.com/golang/go/issues/17594
reflect.TypeOf(os.Stdout).Elem()
return 10
}