Lang Hames 98be16f20f [JITLink][COFF] Use regular external symbol resolution for __ImageBase. ...

This fixes a concurrency bug in the COFF_x86_64 backend: lookupAsync was used
to find __ImageBase without blocking to wait for the result.

Rather than adding promises / futures, this patch just adds an external
__ImageBase symbol if needed. This is the canonical JITLink solution for
resolving external symbols, and is simpler and more concurrency friendly than
using promises / futures with lookupAsync.

2024-12-23 12:28:14 +11:00

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