Relocate Mach-O AST section parsing from SerializedModuleLoader/ to ASTSectionImporter/.

Swift SVN r7869

include/swift/ASTSectionImporter/ASTSectionImporter.h

@@ -0,0 +1,42 @@
+//===--- ASTSectionImporter.cpp - Import AST Section Modules ---*- C++ -*--===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See http://swift.org/LICENSE.txt for license information
+// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements support for loading modules serialized into a
+// Mach-O AST section into Swift.
+//
+//===----------------------------------------------------------------------===//
+#ifndef SWIFT_ASTSECTION_IMPORTER_H
+#define SWIFT_ASTSECTION_IMPORTER_H
+
+#include "llvm/ADT/SmallVector.h"
+#include <memory>
+
+namespace llvm {
+  class MemoryBuffer;
+}
+namespace swift {
+  class SerializedModuleLoader;
+
+  /// \brief Povided a memory buffer with an entire Mach-O __apple_ast
+  /// section, this function makes memory buffer copies of all swift
+  /// modules found in it and registers them using
+  /// registerMemoryBuffer() so they can be found by loadModule(). The
+  /// the access path of all modules found in the section is appended
+  /// to the vector foundModules.
+  /// \return true if successful.
+  bool parseASTSection(SerializedModuleLoader* SML,
+                       const std::unique_ptr<llvm::MemoryBuffer> &data,
+                       SmallVectorImpl<std::string> &foundModules);
+
+
+}
+#endif

include/swift/Serialization/SerializedModuleLoader.h

@@ -13,6 +13,7 @@
 #ifndef SWIFT_SERIALIZATION_MODULELOADER_H
 #define SWIFT_SERIALIZATION_MODULELOADER_H
 
+#include "swift/Basic/Dwarf.h"
 #include "swift/AST/ModuleLoader.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -70,16 +71,6 @@ public:
     MemoryBuffers[AccessPath].reset(input.release());
   }
 
-  /// \brief Povided a memory buffer with an entire Mach-O __apple_ast
-  /// section, this function makes memory buffer copies of all swift
-  /// modules found in it and registers them using
-  /// registerMemoryBuffer() so they can be found by loadModule(). The
-  /// the access path of all modules found in the section is appended
-  /// to the vector foundModules.
-  /// \return true if successful.
-  bool addASTSection(std::unique_ptr<llvm::MemoryBuffer> data,
-                     SmallVectorImpl<std::string> &foundModules);
-
   /// \brief Look for declarations associated with the given name.
   ///
   /// \param module The module to search.

lib/ASTSectionImporter/ASTSectionImporter.cpp

@@ -0,0 +1,83 @@
+//===--- ASTSectionImporter.cpp - Import AST Section Modules --------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See http://swift.org/LICENSE.txt for license information
+// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements support for loading modules serialized into a
+// Mach-O AST section into Swift.
+//
+//===----------------------------------------------------------------------===//
+
+#include "swift/Serialization/SerializedModuleLoader.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace swift {
+
+bool parseASTSection(SerializedModuleLoader* SML,
+                     const std::unique_ptr<llvm::MemoryBuffer> &MemoryBuffer,
+                     SmallVectorImpl<std::string> &foundModules) {
+  struct apple_ast_hdr {
+    uint32_t version;
+    uint32_t nmods;
+  };
+
+  struct module_header {
+   uint64_t bitstream_ofs;
+   uint64_t bitstream_size;
+   uint64_t name_ofs;
+   uint32_t language;
+   uint32_t flags;
+  };
+
+  if (MemoryBuffer->getBufferSize() < sizeof(struct apple_ast_hdr)
+                                    + sizeof(struct module_header)) {
+    llvm::dbgs() << "__apple_ast section is too small.\n";
+    return false;
+  }
+
+  size_t size = MemoryBuffer->getBufferSize();
+  const char *data = MemoryBuffer->getBufferStart();
+  auto apple_ast_hdr = reinterpret_cast<const struct apple_ast_hdr *>(data);
+  if (apple_ast_hdr->version != 1) {
+    llvm::dbgs() << "Unsupported __apple_ast section version.\n";
+    return false;
+  }
+
+  // Iterate over all AST modules.
+  for (uint32_t i = 0; i < apple_ast_hdr->nmods; ++i) {
+    auto mh = reinterpret_cast<const struct module_header *>
+      (data+sizeof(apple_ast_hdr));
+
+    if (mh->language != dwarf::DW_LANG_Swift)
+      continue;
+
+    // Get the access path.
+    if (mh->name_ofs + 4 > size) return false;
+    auto nchars = *reinterpret_cast<const uint32_t *>(data + mh->name_ofs);
+    if (mh->name_ofs+sizeof(nchars) > size) return false;
+    assert(nchars < (2 << 10) && "path failed sanity check");
+    llvm::StringRef AccessPath(data+mh->name_ofs+sizeof(nchars), nchars);
+
+    // loadModule() wants to take ownership of the input memory buffer.
+    // Copy the bitstream into a new memory buffer.
+    if (mh->bitstream_ofs + mh->bitstream_size > size) return false;
+    auto mem = llvm::StringRef(data+mh->bitstream_ofs, mh->bitstream_size);
+    auto bitstream = llvm::MemoryBuffer::getMemBufferCopy(mem, AccessPath);
+
+    // Register the memory buffer.
+    SML->registerMemoryBuffer(AccessPath,
+                              std::unique_ptr<llvm::MemoryBuffer>(bitstream));
+    foundModules.push_back(AccessPath);
+  }
+  return true;
+}
+
+}

lib/ASTSectionImporter/CMakeLists.txt

@@ -0,0 +1,4 @@
+add_swift_library(swiftASTSectionImporter
+  ASTSectionImporter.cpp
+  DEPENDS swiftBasic LLVMCore)
+

lib/ASTSectionImporter/Makefile

@@ -0,0 +1,19 @@
+##===- swift/lib/ASTSectionImporter/Makefile --------------*- Makefile -*-===##
+#
+# This source file is part of the Swift.org open source project
+#
+# Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See http://swift.org/LICENSE.txt for license information
+# See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+#
+##===----------------------------------------------------------------------===##
+
+SWIFT_LEVEL := ../..
+include $(SWIFT_LEVEL)/../../Makefile.config
+
+LIBRARYNAME := swiftASTSectionImporter
+
+include $(SWIFT_LEVEL)/Makefile
+

lib/CMakeLists.txt

@@ -8,6 +8,7 @@ add_subdirectory(Parse)
 add_subdirectory(Sema)
 add_subdirectory(ClangImporter)
 add_subdirectory(NullClangImporter)
+add_subdirectory(ASTSectionImporter)
 add_subdirectory(Serialization)
 add_subdirectory(IDE)
 add_subdirectory(Frontend)

lib/ClangImporter/Makefile

@@ -1,5 +1,5 @@
 ##===- swift/lib/ClangImporter/Makefile --------------------*- Makefile -*-===##
-# 
+#
 # This source file is part of the Swift.org open source project
 #
 # Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors

lib/Makefile

@@ -12,6 +12,6 @@
 SWIFT_LEVEL := ..
 
 PARALLEL_DIRS = Basic AST Sema Parse SIL SILGen SILPasses IRGen ClangImporter \
-                NullClangImporter Serialization IDE Frontend
+                NullClangImporter ASTSectionImporter Serialization IDE Frontend
 
 include $(SWIFT_LEVEL)/Makefile

lib/Serialization/SerializedModuleLoader.cpp

@@ -16,7 +16,6 @@
 #include "swift/AST/AST.h"
 #include "swift/AST/Component.h"
 #include "swift/AST/Diagnostics.h"
-#include "swift/Basic/Dwarf.h"
 #include "swift/Basic/STLExtras.h"
 #include "swift/Basic/SourceManager.h"
 #include "llvm/ADT/SmallString.h"
@@ -81,67 +80,6 @@ static llvm::error_code findModule(ASTContext &ctx, AccessPathElem moduleID,
   return err;
 }
 
-
-bool SerializedModuleLoader::
-addASTSection(std::unique_ptr<llvm::MemoryBuffer> MemoryBuffer,
-               SmallVectorImpl<std::string> &foundModules) {
-  struct apple_ast_hdr {
-    uint32_t version;
-    uint32_t nmods;
-  };
-
-  struct module_header {
-   uint64_t bitstream_ofs;
-   uint64_t bitstream_size;
-   uint64_t name_ofs;
-   uint32_t language;
-   uint32_t flags;
-  };
-
-  if (MemoryBuffer->getBufferSize() < sizeof(struct apple_ast_hdr)
-                                    + sizeof(struct module_header)) {
-    llvm::dbgs() << "__apple_ast section is too small.\n";
-    return false;
-  }
-
-  size_t size = MemoryBuffer->getBufferSize();
-  const char *data = MemoryBuffer->getBufferStart();
-  auto apple_ast_hdr = reinterpret_cast<const struct apple_ast_hdr *>(data);
-  if (apple_ast_hdr->version != 1) {
-    llvm::dbgs() << "Unsupported __apple_ast section version.\n";
-    return false;
-  }
-
-  // Iterate over all AST modules.
-  for (uint32_t i = 0; i < apple_ast_hdr->nmods; ++i) {
-    auto mh = reinterpret_cast<const struct module_header *>
-      (data+sizeof(apple_ast_hdr));
-
-    if (mh->language != dwarf::DW_LANG_Swift)
-      continue;
-
-    // Get the access path.
-    if (mh->name_ofs + 4 > size) return false;
-    auto nchars = *reinterpret_cast<const uint32_t *>(data + mh->name_ofs);
-    if (mh->name_ofs+sizeof(nchars) > size) return false;
-    assert(nchars < (2 << 10) && "path failed sanity check");
-    llvm::StringRef AccessPath(data+mh->name_ofs+sizeof(nchars), nchars);
-
-    // loadModule() wants to take ownership of the input memory buffer.
-    // Copy the bitstream into a new memory buffer.
-    if (mh->bitstream_ofs + mh->bitstream_size > size) return false;
-    auto mem = llvm::StringRef(data+mh->bitstream_ofs, mh->bitstream_size);
-    auto bitstream = llvm::MemoryBuffer::getMemBufferCopy(mem, AccessPath);
-
-    // Register the memory buffer.
-    registerMemoryBuffer(AccessPath,
-                         std::unique_ptr<llvm::MemoryBuffer>(bitstream));
-    foundModules.push_back(AccessPath);
-  }
-  return true;
-}
-
-
 Module *SerializedModuleLoader::loadModule(SourceLoc importLoc,
                                            Module::AccessPathTy path) {
   // FIXME: Swift submodules?

tools/lldb-moduleimport-test/CMakeLists.txt

@@ -1,6 +1,6 @@
 add_swift_executable(lldb-moduleimport-test
   lldb-moduleimport-test.cpp
-  DEPENDS swiftParse swiftSema swiftClangImporter swiftAST swiftSerialization swiftFrontend
+  DEPENDS swiftParse swiftSema swiftClangImporter swiftAST swiftASTSectionImporter swiftSerialization swiftFrontend
   COMPONENT_DEPENDS support ${LLVM_TARGETS_TO_BUILD})
 
 target_link_libraries(swift)

tools/lldb-moduleimport-test/Makefile

@@ -17,7 +17,9 @@ TOOLNAME = lldb-moduleimport-test
 include $(SWIFT_LEVEL)/../../Makefile.config
 
 LINK_COMPONENTS := $(TARGETS_TO_BUILD) bitreader mcjit option
-USEDLIBS = swiftFrontend.a swiftParse.a swiftClangImporter.a swiftSIL.a swiftSema.a swiftSerialization.a swiftAST.a swiftBasic.a
+USEDLIBS = swiftFrontend.a swiftParse.a \
+	swiftClangImporter.a swiftASTSectionImporter.a \
+	swiftSIL.a swiftSema.a swiftSerialization.a swiftAST.a swiftBasic.a
 
 LLVMLibsOptions :=     \
   -lclangDriver        \

tools/lldb-moduleimport-test/lldb-moduleimport-test.cpp

@@ -17,7 +17,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "swift/Frontend/Frontend.h"
-#include "swift/Serialization/SerializedModuleLoader.h"
+#include "swift/ASTSectionImporter/ASTSectionImporter.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/PrettyStackTrace.h"
@@ -100,8 +100,9 @@ int main(int argc, char **argv) {
             // Pass the __apple_AST section to the module loader.
             auto data = llvm::MemoryBuffer::getNewMemBuffer(section.size, name);
             macho.read(const_cast<char *>(data->getBufferStart()), section.size);
-            if (!CI.getSerializedModuleLoader()->addASTSection
-                 (std::unique_ptr<llvm::MemoryBuffer>(data), modules))
+            if (!parseASTSection(CI.getSerializedModuleLoader(),
+                                 std::unique_ptr<llvm::MemoryBuffer>(data),
+                                 modules))
               exit(1);
 
             for (auto path : modules)