0384235a15
In the past, we planned to implement asynchronous preemption using precise register pointer maps. In this strategy, conversions between unsafe.Pointer and uintptr would need to be marked as unsafe points, as if a pointer value is temporarily converted to uintptr (and not live otherwise), the GC would not be able to see it when scanning the stack (and registers). But now we actually implemented asynchronous preemption with inner frame conservative scan. So even if a pointer value lives as an integer the GC can still see it. There is no need to mark the conversion as unsafe points. This allows more places to be preempted, as well as for debugger to inject a call. Fixes #57719. Change-Id: I375ab820d8d74d122b565cf72ecc7cdb225dbc01 Reviewed-on: https://go-review.googlesource.com/c/go/+/461696 Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com> Reviewed-by: Austin Clements <austin@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Cherry Mui <cherryyz@google.com> |
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