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Austin Clements 535741a69a debug/dwarf: fix nil pointer dereference in cyclic type structures
Currently readType simultaneously constructs a type graph and resolves
the sizes of the types. However, these two operations are
fundamentally at odds: the order we parse a cyclic structure in may be
different than the order we need to resolve type sizes in. As a
result, it's possible that when readType attempts to resolve the size
of a typedef, it may dereference a nil Type field of another typedef
retrieved from the type cache that's only partially constructed.

To fix this, we delay resolving typedef sizes until the end of the
readType recursion, when the full type graph is constructed.

Fixes #13039.

Change-Id: I9889af37fb3be5437995030fdd61e45871319d07
Reviewed-on: https://go-review.googlesource.com/18459
Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-01-14 02:05:31 +00:00
api go/types: rename Importer2 to ImporterFrom 2016-01-13 23:40:13 +00:00
doc cmd/compile: recognize Syscall-like functions for liveness analysis 2016-01-14 01:16:45 +00:00
lib/time lib/time: update to IANA release 2015e. 2015-07-22 02:56:31 +00:00
misc cmd/go: -buildmode=c-shared should work on darwin/386 2016-01-13 18:24:38 +00:00
src debug/dwarf: fix nil pointer dereference in cyclic type structures 2016-01-14 02:05:31 +00:00
test cmd/compile: recognize Syscall-like functions for liveness analysis 2016-01-14 01:16:45 +00:00
.gitattributes .gitattributes: prevent all magic line ending changes 2014-12-12 23:14:54 +00:00
.gitignore runtime: break out system-specific constants into package sys 2015-11-12 17:04:45 +00:00
AUTHORS A+C: manual updates 2016-01-08 06:02:39 +00:00
CONTRIBUTING.md doc: suggest security@golang.org for reporting security issues 2015-06-26 09:53:36 +00:00
CONTRIBUTORS A+C: manual updates 2016-01-08 06:02:39 +00:00
favicon.ico godoc: update favicon 2012-10-11 17:02:36 +11:00
LICENSE doc: update licensing text one more time 2012-03-27 15:09:13 +11:00
PATENTS
README.md readme: emphasize issue tracker is for bugs/proposals 2015-10-02 18:44:14 +00:00
robots.txt godoc: serve robots.txt raw 2011-02-19 05:46:20 +11:00

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