[thread-safety] use real location for trace spacers
[thread-safety] use real location for trace spacers

Reviewed By: jberdine

Differential Revision: D4906402

fbshipit-source-id: 77f63c6

blzq/infer,jvillard/infer,ryoon/infer,ryoon/infer,facebook/infer,jvillard/infer,ryoon/infer,facebook/infer,ropas/infer,ropas/infer,jvillard/infer,jvillard/infer,ropas/infer,ryoon/infer,ryoon/infer,blzq/infer,blzq/infer,blzq/infer,ropas/infer,facebook/infer,blzq/infer,facebook/infer,ropas/infer,jvillard/infer,ropas/infer,blzq/infer,ryoon/infer,facebook/infer,jvillard/infer,jvillard/infer,facebook/infer,facebook/infer