tree f261e55e909f6b6d6636831337d2d00dd72a0f08
parent 8c439c7e841d04d2f05b963fe54457be526ac3d0
author Martin Kustermann <kustermann@google.com> 1548412308 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1548412308 +0000

[VM/AOT] Ensure we set flags from snapshot very early in the VM initialization

There are uses of flags before the VM snapshot gets read, so we need to
move the "snapshot sniffing" code to the very beginning of Dart::Init().

Due to the fact that FullSnapshotReader/Deserializer assume there is a
[Thread] available - and we don't have a [Thread] yet when we should
process the flags - this CL moves version/feature logic into a new
[SnapshotHeaderReader] class which does not depend on Thread/...

Change-Id: I38a45041f0696b96e44fc2b294e3442a5fba1a81
Reviewed-on: https://dart-review.googlesource.com/c/90941
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Ryan Macnak <rmacnak@google.com>