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2020-10-30reflect,runtime: use internal ABI for selected ASM routines, attempt 2Than McIntosh
[This is a roll-forward of CL 262319, with a fix for some Darwin test failures]. Change the definitions of selected runtime assembly routines from ABI0 (the default) to ABIInternal. The ABIInternal def is intended to indicate that these functions don't follow the existing Go runtime ABI. In addition, convert the assembly reference to runtime.main (from runtime.mainPC) to ABIInternal. Finally, for functions such as "runtime.duffzero" that are called directly from generated code, make sure that the compiler looks up the correct ABI version. This is intended to support the register abi work, however these changes should not have any issues even when GOEXPERIMENT=regabi is not in effect. Updates #27539, #40724. Change-Id: Idf507f1c06176073563845239e1a54dad51a9ea9 Reviewed-on: https://go-review.googlesource.com/c/go/+/266638 Trust: Than McIntosh <thanm@google.com> Run-TryBot: Than McIntosh <thanm@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com> TryBot-Result: Go Bot <gobot@golang.org>
2020-10-29Revert "reflect,runtime: use internal ABI for selected ASM routines"Than McIntosh
This reverts commit 50af50d136551e2009b2b52e829570536271cdaa. Reason for revert: Causes failures in the runtime package test on Darwin, apparently. Change-Id: I006bc1b3443fa7207e92fb4a93e3fb438d4d3de3 Reviewed-on: https://go-review.googlesource.com/c/go/+/266257 Trust: Than McIntosh <thanm@google.com> Run-TryBot: Than McIntosh <thanm@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-10-29reflect,runtime: use internal ABI for selected ASM routinesThan McIntosh
Change the definitions of selected runtime assembly routines from ABI0 (the default) to ABIInternal. The ABIInternal def is intended to indicate that these functions don't follow the existing Go runtime ABI. In addition, convert the assembly reference to runtime.main (from runtime.mainPC) to ABIInternal. Finally, for functions such as "runtime.duffzero" that are called directly from generated code, make sure that the compiler looks up the correct ABI version. This is intended to support the register abi work, however these changes should not have any issues even when GOEXPERIMENT=regabi is not in effect. Updates #27539, #40724. Change-Id: I9846f8dcaccc95718cf2e61a18b7e924a0677e4c Reviewed-on: https://go-review.googlesource.com/c/go/+/262319 Run-TryBot: Than McIntosh <thanm@google.com> TryBot-Result: Go Bot <gobot@golang.org> Trust: Than McIntosh <thanm@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com>
2020-10-06runtime: use sigaltstack on macOS/ARM64Cherry Zhang
Currently we don't use sigaltstack on darwin/arm64, as is not supported on iOS. However, it is supported on macOS. Use it. (iOS remains unchanged.) Change-Id: Icc154c5e2edf2dbdc8ca68741ad9157fc15a72ee Reviewed-on: https://go-review.googlesource.com/c/go/+/256917 Trust: Cherry Zhang <cherryyz@google.com> Reviewed-by: Ian Lance Taylor <iant@golang.org>
2020-09-23all: add GOOS=iosCherry Zhang
Introduce GOOS=ios for iOS systems. GOOS=ios matches "darwin" build tag, like GOOS=android matches "linux" and GOOS=illumos matches "solaris". Only ios/arm64 is supported (ios/amd64 is not). GOOS=ios and GOOS=darwin remain essentially the same at this point. They will diverge at later time, to differentiate macOS and iOS. Uses of GOOS=="darwin" are changed to (GOOS=="darwin" || GOOS=="ios"), except if it clearly means macOS (e.g. GOOS=="darwin" && GOARCH=="amd64"), it remains GOOS=="darwin". Updates #38485. Change-Id: I4faacdc1008f42434599efb3c3ad90763a83b67c Reviewed-on: https://go-review.googlesource.com/c/go/+/254740 Trust: Cherry Zhang <cherryyz@google.com> Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Austin Clements <austin@google.com>
2019-11-12runtime: enable async preemption on darwin/arm64Cherry Zhang
The problem should be fixed by the previous CL. Reenable async preemption on darwin/arm64. Updates #35439. Change-Id: I93e8c4702b4d8fe6abaa6fc9c27def5c8aed1b59 Reviewed-on: https://go-review.googlesource.com/c/go/+/206419 Reviewed-by: Keith Randall <khr@golang.org>
2019-11-07runtime: add async preemption support on ARM64Cherry Zhang
This CL adds support of call injection and async preemption on ARM64. There seems no way to return from the injected call without clobbering *any* register. So we have to clobber one, which is chosen to be REGTMP. Previous CLs have marked code sequences that use REGTMP async-nonpreemtible. Change-Id: Ieca4e3ba5557adf3d0f5d923bce5f1769b58e30b Reviewed-on: https://go-review.googlesource.com/c/go/+/203461 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org> Reviewed-by: Austin Clements <austin@google.com>
2019-11-02runtime: asynchronous preemption function for x86Austin Clements
This adds asynchronous preemption function for amd64 and 386. These functions spill and restore all register state that can be used by user Go code. For the moment we stub out the other arches. For #10958, #24543. Change-Id: I6f93fabe9875f4834922a5712362e79045c00aca Reviewed-on: https://go-review.googlesource.com/c/go/+/201759 Run-TryBot: Austin Clements <austin@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com>
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