d9e068d289
Recently some tsan tests were enabled on ppc64le which had not been enabled before. This resulted in failures on systems with tsan available, and while debugging it was determined that there were other issues related to the use of signals with cgo. Signals were not being forwarded within programs linked against libtsan because the nocgo sigaction was being called for ppc64le with or without cgo. Adding callCgoSigaction and calling that allows signals to be registered so that signal forwarding works. For linux-ppc64 and aix-ppc64, this won't change. On linux-ppc64 there is no cgo. I can't test aix-ppc64 so those owners can enable it if they want. In reviewing comments about sigtramp in sys_linux_arm64 it was noted that a previous issue in arm64 due to missing callee save registers could also be a problem on ppc64x, so code was added to save and restore those. Also, the use of R31 as a temp register in some cases caused an issue since it is a nonvolatile register in C and was being clobbered in cases where the C code expected it to be valid. The code sequences to load these addresses were changed to avoid the use of R31 when loading such an address. To get around a vet error, the stubs_ppc64x.go file in runtime was split into stubs_ppc64.go and stubs_ppc64le.go. Updates #45040 Change-Id: Ia4ecff950613cbe1b89471790b1d3819d5b5cfb9 Reviewed-on: https://go-review.googlesource.com/c/go/+/306369 Trust: Lynn Boger <laboger@linux.vnet.ibm.com> Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Carlos Eduardo Seo <carlos.seo@linaro.org> |
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