eda2e8c683
There are a few places in the runtime where new threads enter Go code with a possibly invalid frame pointer. mstart is the entry point for new Ms, and rt0_go is the entrypoint for the program. As we try to introduce frame pointer unwinding in more places (e.g. for heap profiling in CL 540476 or for execution trace events on the system stack in CL 593835), we see these functions on the stack. We need to ensure that they have valid frame pointers. These functions are both considered the "top" (first) frame frame of the call stack, so this CL sets the frame pointer register to 0 in these functions. Updates #63630 Change-Id: I6a6a6964a9ebc6f68ba23d2616e5fb6f19677f97 Reviewed-on: https://go-review.googlesource.com/c/go/+/721020 Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Auto-Submit: Michael Knyszek <mknyszek@google.com> |
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The Go Programming Language
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