cmd/go, plugin: disable plugins on darwin

We are seeing a bad stack map in #18190. In a copystack, it is
mistaking a slot for a pointer.

Presumably this is caused either by our fledgling dynlink support on
darwin, or a consequence of having two copies of the runtime in the
process. But I have been unable to work out which in the 1.8 window,
so pushing darwin support to 1.9 or later.

Change-Id: I7fa4d2dede75033d9a428f24c1837a4613bd2639
Reviewed-on: https://go-review.googlesource.com/34391
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
David Crawshaw 2016-12-14 14:48:58 -05:00 committed by Brad Fitzpatrick
parent 2adc2d1b8b
commit c1ada22bc1
5 changed files with 4 additions and 7 deletions

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@ -417,7 +417,7 @@ version of gccgo.
plugins written in Go, and a
new <a href="/pkg/plugin/"><code>plugin</code></a> package for
loading such plugins at run time. Plugin support is only currently
available on Linux and macOS.
available on Linux.
</p>
<h2 id="runtime">Runtime</h2>

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@ -29,7 +29,6 @@ cmd/link: fix -buildmode=pie / -linkshared combination (CL 28996)
cmd/link: for -buildmode=exe pass -no-pie to external linker (CL 33106)
cmd/link: insert trampolines for too-far jumps on ARM (CL 29397)
cmd/link: non-executable stack support for Solaris (CL 24142)
cmd/link: plugin support on darwin/amd64 (CL 29394)
cmd/link: put text at address 0x1000000 on darwin/amd64 (CL 32185)
cmd/link: remove the -shared flag (CL 28852)
cmd/link: split large elf text sections on ppc64x (CL 27790)

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@ -786,8 +786,7 @@ func (t *tester) supportedBuildmode(mode string) bool {
// linux-arm64 is missing because it causes the external linker
// to crash, see https://golang.org/issue/17138
switch pair {
case "linux-386", "linux-amd64", "linux-arm",
"darwin-amd64":
case "linux-386", "linux-amd64", "linux-arm":
return true
}
return false

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@ -413,8 +413,7 @@ func buildModeInit() {
} else {
switch platform {
case "linux/amd64", "linux/arm", "linux/arm64", "linux/386",
"android/amd64", "android/arm", "android/arm64", "android/386",
"darwin/amd64":
"android/amd64", "android/arm", "android/arm64", "android/386":
default:
fatalf("-buildmode=plugin not supported on %s\n", platform)
}

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@ -4,7 +4,7 @@
// Package plugin implements loading and symbol resolution of Go plugins.
//
// Currently plugins only work on Linux and Darwin.
// Currently plugins only work on Linux.
//
// A plugin is a Go main package with exported functions and variables that
// has been built with: