70546f6404
DLLs built with recent Microsoft toolchains for ARM64 test for ARMv8.1 atomics by potentially calling an illegal instruction, and then trapping the exception to disable use of them by way of a structured exception handler. However, vectored exception handlers are always called before structured exception handlers. When LoadLibrary-ing DLLs that do this probing during initialization, our lastcontinuehandler winds up being called, and then crashing, but actually it should give execution back to the library to handle the exception and fix up the state. So special case this for arm64 with illegal instructions, and hope that we're not masking other things in external DLLs that might more fatally trigger an illegal instruction exception. Updates #47576. Change-Id: I341ab99cd8d513ae999b75596749d49779072022 Reviewed-on: https://go-review.googlesource.com/c/go/+/340070 Trust: Jason A. Donenfeld <Jason@zx2c4.com> Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Russ Cox <rsc@golang.org> |
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