refcounting and take advantage of it.
Also, set the Swift1 flag in classes we generate.
Also, initialize a global cache of the non-pointer-isa
mask and use that instead of object_getClass, at least
within the runtime.
Also, centralize the runtime on a _swift_getSuperclass
function and make that use a direct access while we
await word from Greg on the desired ABI requirements.
Swift SVN r21077
We want to initialize the side weak reference the first time we retain a new unowned reference, not reinitialize the weak reference every time we retain it. Unowned @objc references are still racy, but this fixes the obvious brokenness behind <rdar://problem/17623813>.
Swift SVN r21074
The allocator's crimes include:
* It uses OS SPI that must not be used by non-OS apps.
* It does not play well with memory debugging tools like Instruments.
* It does not return memory to the OS in response to memory pressure.
* It is less tested than we would like because many configurations
inadvertently turn it off (such as running from Xcode).
* Its per-thread magazine implementation does not actually work.
* Its "try alloc" flag is incompletely implemented and never used.
* Its "zero fill" flag is unimplemented and inconsistently used.
Swift SVN r20757
This is the most general dynamic cast operation, permitting
arbitary source and destination types and handling arbitrary
changes in representation. A value of the destination type
is constructed in an address provided by the caller; flags
control the behavior w.r.t. the source value.
Not yet used; probably buggy in various particulars.
Swift SVN r18815
Prior to this fix this would fail:
(swift) import Foundation
(swift) extension NSDate { func foo() { println("foo") }}
As the Class for NSDate was not initialized.
<rdar://problem/16934080>
Swift SVN r18206
Huge allocation leaks are detected correctly.
Tiny allocation leaks are problematic, both false positive and false negative.
For example:
leaks Report Version: 2.0
Process 73345: 4980 nodes malloced for 1677 KB
Process 73345: 1 leak for 1048576 total leaked bytes.
Leak: 0x10aed0000 size=1048576 zone: SwiftZone_0x10adc35d8
Swift SVN r18007
