gocore: skip nil largeType when discovering pointers

If a core is taken while a goroutine is allocating a large object (which
is more likely than smaller objects, because zeroing is delayed and
takes longer than for smaller objects) gocore might observe a nil
largeType in the span, which is left nil to prevent the GC from trying
to scan the partially-initialized object.

Fixes golang/go#71182.

Change-Id: Iafa7aed29466dc8ad6eac8f10171885421e10f76
Reviewed-on: https://go-review.googlesource.com/c/debug/+/641515
Reviewed-by: Nicolas Hillegeer <aktau@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
1 file changed
tree: f9610cedff679efee15ce51bf6e175f51c86bfcf
  1. cmd/
  2. dwtest/
  3. internal/
  4. third_party/
  5. codereview.cfg
  6. CONTRIBUTING.md
  7. go.mod
  8. go.sum
  9. LICENSE
  10. README.md
README.md

Go Debug

Go Reference

This repository holds utilities and libraries for debugging Go programs.

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