[Blocklist] Make sure blocklist config is read through VFS

Make sure block-list file is read through VFS so CASFS can be used to
read the configuration to ensure sound caching, and also the path of the
blocklist can be canonicalized via path remapping.

include/swift/Basic/BlockList.h

@@ -23,6 +23,8 @@
 
 namespace swift {
 
+class SourceManager;
+
 enum class BlockListAction: uint8_t {
   Undefined = 0,
 #define BLOCKLIST_ACTION(NAME) NAME,
@@ -41,7 +43,7 @@ public:
   void addConfigureFilePath(StringRef path);
   bool hasBlockListAction(StringRef key, BlockListKeyKind keyKind,
                           BlockListAction action);
-  BlockListStore();
+  BlockListStore(SourceManager &SM);
   ~BlockListStore();
 private:
   Implementation &Impl;

lib/AST/ASTContext.cpp

@@ -58,6 +58,7 @@
 #include "swift/AST/TypeCheckRequests.h"
 #include "swift/Basic/APIntMap.h"
 #include "swift/Basic/Assertions.h"
+#include "swift/Basic/BlockList.h"
 #include "swift/Basic/Compiler.h"
 #include "swift/Basic/SourceManager.h"
 #include "swift/Basic/Statistic.h"
@@ -779,6 +780,7 @@ ASTContext::ASTContext(
       evaluator(Diags, langOpts), TheBuiltinModule(createBuiltinModule(*this)),
       StdlibModuleName(getIdentifier(STDLIB_NAME)),
       SwiftShimsModuleName(getIdentifier(SWIFT_SHIMS_NAME)),
+      blockListConfig(SourceMgr),
       TheErrorType(new (*this, AllocationArena::Permanent) ErrorType(
           *this, Type(), RecursiveTypeProperties::HasError)),
       TheUnresolvedType(new(*this, AllocationArena::Permanent)

lib/Basic/BlockList.cpp

@@ -19,7 +19,7 @@
 #include "swift/Basic/SourceManager.h"
 
 struct swift::BlockListStore::Implementation {
-  SourceManager SM;
+  SourceManager &SM;
   llvm::StringMap<std::vector<BlockListAction>> ModuleActionDict;
   llvm::StringMap<std::vector<BlockListAction>> ProjectActionDict;
   void addConfigureFilePath(StringRef path);
@@ -44,9 +44,12 @@ struct swift::BlockListStore::Implementation {
     }
     return std::string();
   }
+
+  Implementation(SourceManager &SM) : SM(SM) {}
 };
 
-swift::BlockListStore::BlockListStore(): Impl(*new Implementation()) {}
+swift::BlockListStore::BlockListStore(swift::SourceManager &SM)
+    : Impl(*new Implementation(SM)) {}
 
 swift::BlockListStore::~BlockListStore() { delete &Impl; }
 

test/CAS/block-list.swift

@@ -4,6 +4,7 @@
 // RUN: %target-swift-frontend -scan-dependencies -module-name Test -O \
 // RUN:   -disable-implicit-string-processing-module-import -disable-implicit-concurrency-module-import \
 // RUN:   -blocklist-file %t/blocklist.yml -blocklist-file %t/empty.yml \
+// RUN:   -scanner-prefix-map %t=/^tmp \
 // RUN:   %t/main.swift -o %t/deps.json -cache-compile-job -cas-path %t/cas 
 
 // RUN: %{python} %S/Inputs/BuildCommandExtractor.py %t/deps.json clang:SwiftShims > %t/shim.cmd
@@ -25,10 +26,11 @@
 // RUN:   -swift-version 5 -disable-implicit-swift-modules \
 // RUN:   -disable-implicit-string-processing-module-import -disable-implicit-concurrency-module-import \
 // RUN:   -module-name Test -explicit-swift-module-map-file @%t/map.casid \
-// RUN:   -blocklist-file %t/blocklist.yml -blocklist-file %t/empty.yml \
+// RUN:   -blocklist-file /^tmp/blocklist.yml -blocklist-file /^tmp/empty.yml \
 // RUN:   -enable-layout-string-value-witnesses -enable-layout-string-value-witnesses-instantiation \
 // RUN:   -enable-experimental-feature LayoutStringValueWitnesses -enable-experimental-feature LayoutStringValueWitnessesInstantiation \
-// RUN:   %t/main.swift @%t/MyApp.cmd 2>&1 | %FileCheck %s --check-prefix CHECK-BLOCKED
+// RUN:   -cache-replay-prefix-map /^tmp=%t \
+// RUN:   /^tmp/main.swift @%t/MyApp.cmd 2>&1 | %FileCheck %s --check-prefix CHECK-BLOCKED
 
 // CHECK-BLOCKED: note: Layout string value witnesses have been disabled for module 'Test' through block list entry
 // CHECK-BLOCKED-NOT: type_layout_string

unittests/Basic/BlocklistTest.cpp

@@ -14,6 +14,7 @@
 #include "swift/AST/SearchPathOptions.h"
 #include "swift/Basic/Defer.h"
 #include "swift/Basic/BlockList.h"
+#include "swift/Basic/SourceManager.h"
 
 using namespace swift;
 
@@ -46,7 +47,8 @@ TEST(BlocklistTest, testYamlParsing) {
   ASSERT_FALSE(llvm::sys::fs::createUniqueDirectory(
       "BlocklistTest.testYamlParsing", temp));
   SWIFT_DEFER { llvm::sys::fs::remove_directories(temp); };
-  BlockListStore store;
+  SourceManager sm;
+  BlockListStore store(sm);
   std::string path1, path2;
   ASSERT_FALSE(emitFileWithContents(temp, "block1.yaml",
                                     "---\n"