tree ad7369ec4ef8686ce3b1935667f71420b877bbdd
parent d5ae6ed667e5fde5887b9987f0fa1b6a3902a9bc
author Benjamin Prosnitz <bprosnitz@google.com> 1585956584 +0000
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1585956584 +0000

[llcpp] Don't change source value in std::move of VectorView and tracking_ptr

tracking_ptr is intended to match the behavior of raw pointers for
unowned pointers where possible (and the behavior of unique_ptr for
owned pointers).

This wasn't the case for std::move. Example:
int* x = &something;
int* y = std::move(x);
After these statements, x == y rather than x == nullptr.

The DecodedMessage class (used in ResultOf) has a destructor that
walks the object to close handles. The previous behavior of zeroing
pointers after std::move prevented this walk from traversing the
object and led to handle leaks. This change restores the previous
behavior and allows the object to be walked.

Fixed: 49226
Test: fx test llcpp_fidl_types_test
Test: fx test llcpp_fidl_builder_test

Tests originate from fxr/377022

Change-Id: I35b89f575bfef021c1e4ba48fe549c9fd446439f
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/377654
Commit-Queue: Benjamin Prosnitz <bprosnitz@google.com>
Reviewed-by: Chris Tam <godtamit@google.com>
Reviewed-by: Yifei Teng <yifeit@google.com>
Testability-Review: Yifei Teng <yifeit@google.com>