runtime: fix TestPhysPageSize on AIX
AIX doesn't allow to mmap an address range which is already mmap.
Therefore, once the region has been allocated, it must munmap before
being able to play with it.
The corresponding Go Toolchain patch is CL 174059.
Change-Id: I3dbadb7f5d7bf78714b7a28f41d41c75c61772ab
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/174138
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/libgo/go/runtime/runtime_mmap_test.go b/libgo/go/runtime/runtime_mmap_test.go
index c004041..188fd5d 100644
--- a/libgo/go/runtime/runtime_mmap_test.go
+++ b/libgo/go/runtime/runtime_mmap_test.go
@@ -32,6 +32,11 @@
t.Fatalf("Mmap: %v", err)
}
+ if runtime.GOOS == "aix" {
+ // AIX does not allow mapping a range that is already mapped.
+ runtime.Munmap(unsafe.Pointer(uintptr(b)), 2*ps)
+ }
+
// Mmap should fail at a half page into the buffer.
_, err = runtime.Mmap(unsafe.Pointer(uintptr(b)+ps/2), ps, 0, runtime.MAP_ANON|runtime.MAP_PRIVATE|runtime.MAP_FIXED, -1, 0)
if err == 0 {
