tree f0c9b665d9e314a4131b939d1dbb4bff0b478d40
parent f37a63e419b5601308dbbabe37e0fef7d9ecf816
author Shoaib Meenai <smeenai@fb.com> 1555363888 +0000
committer Shoaib Meenai <smeenai@fb.com> 1555363888 +0000

[Support] Fix recursive response file expansion guard

Response file expansion limits the amount of expansion to prevent
potential infinite recursion. However, the current logic assumes that
any argument beginning with @ is a response file, which is not true for
e.g. `-Xlinker -rpath -Xlinker @executable_path/../lib` on Darwin.
Having too many of these non-response file arguments beginning with @
prevents actual response files from being expanded. Instead, limit based
on the number of successful response file expansions, which should still
prevent infinite recursion but also avoid false positives.

Differential Revision: https://reviews.llvm.org/D60631

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358452 91177308-0d34-0410-b5e6-96231b3b80d8