runtime: add lock partial order edge for trace and wbufSpans and mheap

This edge represents the case of executing a write barrier under the
trace lock: we might use the wbufSpans lock to get a new trace buffer,
or mheap to allocate a totally new one.

Fixes #52794.

Change-Id: Ia1ac2c744b8284ae29f4745373df3f9675ab1168
Reviewed-on: https://go-review.googlesource.com/c/go/+/405476
Run-TryBot: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
1 file changed
tree: 287f49f29f2d0bc67bcc96b8d290858faf80f430
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. codereview.cfg
  12. CONTRIBUTING.md
  13. CONTRIBUTORS
  14. LICENSE
  15. PATENTS
  16. README.md
  17. SECURITY.md
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