Reland 'Add VFS support for sanitizers' blacklist'

The original patch broke the test for Windows.
Trying to fix as per Reid's suggestions outlined here:
https://reviews.llvm.org/rC371663

Differential Revision: https://reviews.llvm.org/D67742

llvm-svn: 374006

1 files changed, 18 insertions, 1 deletions

diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index a41b64ffcc8..906c54194d9 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -72,6 +72,7 @@
 #include "llvm/ADT/PointerUnion.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
@@ -81,6 +82,7 @@
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/MathExtras.h"
+#include "llvm/Support/VirtualFileSystem.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 #include <cassert>
@@ -826,6 +828,18 @@ static bool isAddrSpaceMapManglingEnabled(const TargetInfo &TI,
   llvm_unreachable("getAddressSpaceMapMangling() doesn't cover anything.");
 }
 
+static std::vector<std::string>
+getRealPaths(llvm::vfs::FileSystem &VFS, llvm::ArrayRef<std::string> Paths) {
+  std::vector<std::string> Result;
+  llvm::SmallString<128> Buffer;
+  for (const auto &File : Paths) {
+    if (std::error_code EC = VFS.getRealPath(File, Buffer))
+      llvm::report_fatal_error("can't open file '" + File + "': " + EC.message());
+    Result.push_back(Buffer.str());
+  }
+  return Result;
+}
+
 ASTContext::ASTContext(LangOptions &LOpts, SourceManager &SM,
                        IdentifierTable &idents, SelectorTable &sels,
                        Builtin::Context &builtins)
@@ -833,7 +847,10 @@ ASTContext::ASTContext(LangOptions &LOpts, SourceManager &SM,
       TemplateSpecializationTypes(this_()),
       DependentTemplateSpecializationTypes(this_()),
       SubstTemplateTemplateParmPacks(this_()), SourceMgr(SM), LangOpts(LOpts),
-      SanitizerBL(new SanitizerBlacklist(LangOpts.SanitizerBlacklistFiles, SM)),
+      SanitizerBL(new SanitizerBlacklist(
+          getRealPaths(SM.getFileManager().getVirtualFileSystem(),
+                       LangOpts.SanitizerBlacklistFiles),
+          SM)),
       XRayFilter(new XRayFunctionFilter(LangOpts.XRayAlwaysInstrumentFiles,
                                         LangOpts.XRayNeverInstrumentFiles,
                                         LangOpts.XRayAttrListFiles, SM)),