| commit | 79685b59b78804f99e46f12ac888edbc0a6d1472 | [log] [tgz] |
|---|---|---|
| author | Lang Hames <lhames@gmail.com> | Tue Jan 28 14:46:27 2025 +1100 |
| committer | Lang Hames <lhames@gmail.com> | Tue Jan 28 14:57:49 2025 +1100 |
| tree | d5beec232797b08b2e9518869116a637f1122a81 | |
| parent | 8b29c5ccddb87ac7336a700877dc08cdc57ac65b [diff] |
[JITLink][aarch64] Fix dependence tracking for Pointer64Authenticated edges. Transform Pointer64Authenticated edges into KeepAlive edges, rather than removing them, in order to preserve symbol dependence information. The lowerPointer64AuthEdgesToSigningFunction pass is responsible for transforming Pointer64Authenticated edges to a signing function that can be run in the executing process to initialize global PAC pointers. Removing the edges entirely in this pass results in loss of dependence tracking, which can in turn cause ORC to report PAC pointers as ready before the pointers targets have completed materialization (resulting in a use-before-finalize error, often manifesting as access to uninitialized / unprotected memory). This commit addresses the issue by leaving the edges in the graph and simply changing their kind to KeepAlive, a no-op for fixup purposes but followed for dependence tracking purposes.
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