| commit | 72dec90bfdb60a0ca2ac1b743db472d2e689414e | [log] [tgz] |
|---|---|---|
| author | Cherry Zhang <cherryyz@google.com> | Sat Oct 24 13:14:36 2020 -0400 |
| committer | Cherry Zhang <cherryyz@google.com> | Wed Oct 28 13:25:44 2020 +0000 |
| tree | 9c3e315b322275e8b55f01c40757bb0ed2f47b25 | |
| parent | cf6cfba4d5358404dd890f6025e573a4b2156543 [diff] |
runtime: set up TLS without cgo on darwin/arm64 Currently, on darwin/arm64 we set up TLS using cgo. TLS is not set for pure Go programs. As we use libc for syscalls on darwin, we need to save the G register before the libc call. Otherwise it is not signal-safe, as a signal may land during the execution of a libc function, where the G register may be clobbered. This CL initializes TLS in Go, by calling the pthread functions directly without cgo. This makes it possible to save the G register to TLS in pure Go programs (done in a later CL). Inspired by Elias's CL 209197. Write the logic in Go instead of assembly. Updates #38485, #35853. Change-Id: I257ba2a411ad387b2f4d50d10129d37fec7a226e Reviewed-on: https://go-review.googlesource.com/c/go/+/265118 Trust: Cherry Zhang <cherryyz@google.com> Trust: Elias Naur <mail@eliasnaur.com> Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
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