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8 Commits

Author SHA1 Message Date
Mike Ash
fe7e13bba5 [Runtime][IRGen] Sign type context descriptor pointers. 
Ensure that context descriptor pointers are signed in the runtime by putting the ptrauth_struct attribute on the types.

We use the new __builtin_ptrauth_struct_key/disc to conditionally apply ptrauth_struct to TrailingObjects based on the signing of the base type, so that pointers to TrailingObjects get signed when used with a context descriptor pointer.

We add new runtime entrypoints that take signed pointers where appropriate, and have the compiler emit calls to the new entrypoints when targeting a sufficiently new OS.

rdar://111480914
 2023-07-07 18:10:35 -04:00
Josh Soref
871634b9f3 Spelling include (#42616) 
* spelling: accessible

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* spelling: are

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* spelling: dereference

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* spelling: for

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* spelling: guarantee

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* spelling: initialization

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* spelling: label

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* spelling: mangled

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* spelling: performance

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* spelling: referenced

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* spelling: standard

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* spelling: truncate

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* spelling: undesirable

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* spelling: uniformly

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* spelling: uninitialized

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* spelling: value

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* spelling: verification

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Co-authored-by: Josh Soref <jsoref@users.noreply.github.com>
 2022-04-25 09:00:59 -07:00
Arnold Schwaighofer
36ae8cd90d Remove non-existant header use 2020-12-05 09:06:47 -08:00
Adrian Prantl
468b74bd70 Update Swift master-next for upstream llvm.org changes. 2019-10-21 13:31:31 -07:00
JF Bastien
31e6a989f5 [NFC] Don't use LLVM_ALIGNAS (#26411) 
It's not useful anymore, and I'm about to remove it in upstream.
 2019-07-30 13:14:02 -07:00
JF Bastien
7ef9a6cdf1 Don't use AlignedCharArray (#26351) 
I'm about to remove it in https://reviews.llvm.org/D65249
 2019-07-25 12:54:38 -07:00
Doug Gregor
9af914eafa [ABI] Remove the “final” assertion from the ABI’s TrailingObjects. 
In our ABI, we’re using some C++ ABI tricks to simplify the 
implementation of the runtime. One of them, in FullMetadata, requires
that we inherit from classes that we would also like to make use
TrailingObjects. Remove the “final” assertion from TrailingObjects
so we can do so.

We promise to be careful.
 2018-07-20 20:54:49 -07:00
Joe Groff
fe192c6daf Runtime: Refactor NominalTypeDescriptor to use TrailingObjects. 
NFC intended. The layout of trailing matter here is getting fairly complex, so it's good to use LLVM's existing library code to keep track of it. We use a fork of llvm's TrailingObjects.h header so that future changes to LLVM don't disturb the ABI of Swift runtime objects that use the template.
 2017-12-11 16:26:29 -08:00