[lldb] Add reproducer verifier

Add a reproducer verifier that catches:

 - Missing or invalid home directory
 - Missing or invalid working directory
 - Missing or invalid module/symbol paths
 - Missing files from the VFS

The verifier is enabled by default during replay, but can be skipped by
passing --reproducer-no-verify.

Differential revision: https://reviews.llvm.org/D86497

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/lib/Support/VirtualFileSystem.cpp b/llvm/lib/Support/VirtualFileSystem.cpp
index 5b757c9..bbde44c 100644
--- a/llvm/lib/Support/VirtualFileSystem.cpp
+++ b/llvm/lib/Support/VirtualFileSystem.cpp
@@ -1159,6 +1159,17 @@ StringRef RedirectingFileSystem::getExternalContentsPrefixDir() const {
   return ExternalContentsPrefixDir;
 }
 
+void RedirectingFileSystem::setFallthrough(bool Fallthrough) {
+  IsFallthrough = Fallthrough;
+}
+
+std::vector<StringRef> RedirectingFileSystem::getRoots() const {
+  std::vector<StringRef> R;
+  for (const auto &Root : Roots)
+    R.push_back(Root->getName());
+  return R;
+}
+
 void RedirectingFileSystem::dump(raw_ostream &OS) const {
   for (const auto &Root : Roots)
     dumpEntry(OS, Root.get());