[PATCH] D30915: Canonicalize the path provided by -fmodules-cache-path

[Adrian Prantl via Phabricator via cfe-commits]

aprantl created this revision.

This fixes lookup mismatches that could previously happen when the module cache path contained a '/./' component.
In combination with https://reviews.llvm.org/D28299 this bug can cause a use-after-free.

rdar://problem/30413458


https://reviews.llvm.org/D30915

Files:
  lib/Frontend/CompilerInvocation.cpp
  test/Modules/Inputs/outofdate-rebuild/AppKit.h
  test/Modules/Inputs/outofdate-rebuild/Cocoa.h
  test/Modules/Inputs/outofdate-rebuild/CoreText.h
  test/Modules/Inputs/outofdate-rebuild/CoreVideo.h
  test/Modules/Inputs/outofdate-rebuild/Foundation.h
  test/Modules/Inputs/outofdate-rebuild/module.modulemap
  test/Modules/modules-cache-path-canonicalization.m

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