tree 4ec64a45e2a3dfb2bd731ddce98bb05434c44b69
parent b9dbb030d5e7d2733e877972568368dc806b7304
author Austin Clements <austin@google.com> 1439437150 -0400
committer Austin Clements <austin@google.com> 1442254454 +0000

runtime: fix hashing of trace stacks

The call to hash the trace stack reversed the "seed" and "size"
arguments to memhash and, hence, always called memhash with a 0 size,
which dutifully returned a hash value that depended only on the number
of PCs in the stack and not their values. As a result, all stacks were
put in to a very subset of the 8,192 buckets.

Fix this by passing these arguments in the correct order.

Change-Id: I67cd29312f5615c7ffa23e205008dd72c6b8af62
Reviewed-on: https://go-review.googlesource.com/13613
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>