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runtime: reenable bad pointer check in GC

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The last time we tried this, linux/arm64 broke.
The series of CLs leading to this one fixes that problem.
Let's try again.

Fixes #9880.

Change-Id: I67bc1d959175ec972d4dcbe4aa6f153790f74251
Reviewed-on: https://go-review.googlesource.com/12849
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
This commit is contained in:
Russ Cox 2015-07-29 15:18:56 -04:00
parent 034a10d44c
commit 4addec3aaa
1 changed files with 1 additions and 1 deletions
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2
src/runtime/mbitmap.go
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@ -201,7 +201,7 @@ func heapBitsForObject(p uintptr) (base uintptr, hbits heapBits, s *mspan) {
// The following ensures that we are rigorous about what data // The following ensures that we are rigorous about what data
// structures hold valid pointers. // structures hold valid pointers.
// TODO(rsc): Check if this still happens. // TODO(rsc): Check if this still happens.
if false { if true {
// Still happens sometimes. We don't know why. // Still happens sometimes. We don't know why.
printlock() printlock()
print("runtime:objectstart Span weird: p=", hex(p), " k=", hex(k)) print("runtime:objectstart Span weird: p=", hex(p), " k=", hex(k))