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Audit sources of shared state across rustc #63643

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@aturon

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@aturon

Infrastructure for parallel compilation has landed in rustc, but the shared state involved has not been fully documented (in terms of what state exists, invariants, atomicity, lock ordering, etc) or assessed for removal by refactoring.

This issue tracks the PR history for parallelization infrastructure, which is being re-audited to seed an initial list of shared state to assess. The initial output of the audit is this paper doc, which will ultimately be turned into a set of individual issues.

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  • Issues created for individual pieces of state, together with a tracking issue

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A-parallel-compilerArea: parallel compilerT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.WG-compiler-performanceWorking group: Compiler Performance

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