tree 4275f05d29e8a287104a9aa2602db1e654cb8353
parent 2563706e4ead80d6906d66ae23c8915c360583ad
author Clément Chigot <clement.chigot@atos.net> 1602078465 +0200
committer Ian Lance Taylor <iant@golang.org> 1602636797 +0000

reflect: ensure uniqueness of type descriptors on AIX.

On AIX, duplication of type descriptors can occur if one is
declared in the libgo and one in the Go program being compiled.
The AIX linker isn't able to merge them together as Linux one does.
One solution is to always load libgo first but that needs a huge mechanism in
gcc core. Thus, this patch ensures that the duplication isn't visible
for the end user.

In reflect and internal/reflectlite, the comparison of rtypes is made on their
name and not only on their addresses.

In reflect, toType() function is using a canonicalization map to force rtypes
having the same rtype.String() to return the same Type. This can't be made in
internal/reflectlite as it needs sync package. But, for now, it doesn't matter
as internal/reflectlite is not widely used.

Fixes golang/go#39276

Change-Id: I56f04f8e7068fbda4ec6b24159c02b7d7fa8b8c5
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/260158
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Than McIntosh <thanm@google.com>
Trust: Cherry Zhang <cherryyz@google.com>