[clang] [llvm] [llvm][clang] Sandbox filesystem reads (PR #165350)

[Ben Langmuir via cfe-commits]

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@@ -1132,6 +1147,8 @@ bool is_other(const basic_file_status &status) {
 }
 
 std::error_code is_other(const Twine &Path, bool &Result) {
+  sandbox::violationIfEnabled();
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benlangmuir wrote:

Won't we catch these via `status` being a violation?  Similarly for the other APIs here (e.g. openFileForRead).

https://github.com/llvm/llvm-project/pull/165350