742fda9524
If a goroutine is synchronously preempted, then taking a frame-pointer-based stack trace at that preemption will skip PC of the caller of the function which called into morestack. This happens because the frame pointer is pushed to the stack after the preamble, leaving the stack in an odd state for frame pointer unwinding. Deal with this by marking a goroutine as synchronously preempted and using that signal to load the missing PC from the stack. On LR platforms this is available in gp.sched.lr. On non-LR platforms like x86, it's at gp.sched.sp, because there are no args, no locals, and no frame pointer pushed to the SP yet. For #68090. Change-Id: I73a1206d8b84eecb8a96dbe727195da30088f288 Reviewed-on: https://go-review.googlesource.com/c/go/+/684435 Reviewed-by: Cherry Mui <cherryyz@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Nick Ripley <nick.ripley@datadoghq.com>
The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
Gopher image by Renee French, licensed under Creative Commons 4.0 Attribution license.
Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.
Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
Download and Install
Binary Distributions
Official binary distributions are available at https://go.dev/dl/.
After downloading a binary release, visit https://go.dev/doc/install for installation instructions.
Install From Source
If a binary distribution is not available for your combination of operating system and architecture, visit https://go.dev/doc/install/source for source installation instructions.
Contributing
Go is the work of thousands of contributors. We appreciate your help!
To contribute, please read the contribution guidelines at https://go.dev/doc/contribute.
Note that the Go project uses the issue tracker for bug reports and proposals only. See https://go.dev/wiki/Questions for a list of places to ask questions about the Go language.