Revert "Revert "Revert "Revert "Switch external cvtres.exe for llvm's own resource library.""""

This reverts commit 147f45f.

Revert "Revert "Revert "Revert "Replace trivial use of external rc.exe by writing our own .res file.""""

This reverts commit 61a90a6.

The patches were intially reverted because they were causing a failure
on CrWinClangLLD.  Unfortunately, this was done haphazardly and didn't
compile, so the revert was reverted again quickly to fix this.  One that
was done, the revert of the revert was itself reverted.  This allowed me
to finally fix the actual bug in r307452.  This patch re-enables the
code path that had originally been causing the bug, now that it (should)
be fixed.

llvm-svn: 307460

Author: Eric Beckmann

lld/COFF/DriverUtils.cpp

@@ -20,12 +20,15 @@
 #include "Symbols.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/StringSwitch.h"
+#include "llvm/BinaryFormat/COFF.h"
 #include "llvm/Object/COFF.h"
+#include "llvm/Object/WindowsResource.h"
 #include "llvm/Option/Arg.h"
 #include "llvm/Option/ArgList.h"
 #include "llvm/Option/Option.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FileUtilities.h"
+#include "llvm/Support/MathExtras.h"
 #include "llvm/Support/Process.h"
 #include "llvm/Support/Program.h"
 #include "llvm/Support/raw_ostream.h"
@@ -41,6 +44,9 @@ namespace lld {
 namespace coff {
 namespace {
 
+const uint16_t SUBLANG_ENGLISH_US = 0x0409;
+const uint16_t RT_MANIFEST = 24;
+
 class Executor {
 public:
   explicit Executor(StringRef S) : Prog(Saver.save(S)) {}
@@ -260,26 +266,6 @@ void parseManifestUAC(StringRef Arg) {
   }
 }
 
-// Quote each line with "". Existing double-quote is converted
-// to two double-quotes.
-static void quoteAndPrint(raw_ostream &Out, StringRef S) {
-  while (!S.empty()) {
-    StringRef Line;
-    std::tie(Line, S) = S.split("\n");
-    if (Line.empty())
-      continue;
-    Out << '\"';
-    for (int I = 0, E = Line.size(); I != E; ++I) {
-      if (Line[I] == '\"') {
-        Out << "\"\"";
-      } else {
-        Out << Line[I];
-      }
-    }
-    Out << "\"\n";
-  }
-}
-
 // An RAII temporary file class that automatically removes a temporary file.
 namespace {
 class TemporaryFile {
@@ -393,38 +379,62 @@ static std::string createManifestXml() {
   return readFile(File2.Path);
 }
 
+static std::unique_ptr<MemoryBuffer>
+createMemoryBufferForManifestRes(size_t ManifestSize) {
+  size_t ResSize = alignTo(
+      object::WIN_RES_MAGIC_SIZE + object::WIN_RES_NULL_ENTRY_SIZE +
+          sizeof(object::WinResHeaderPrefix) + sizeof(object::WinResIDs) +
+          sizeof(object::WinResHeaderSuffix) + ManifestSize,
+      object::WIN_RES_DATA_ALIGNMENT);
+  return MemoryBuffer::getNewMemBuffer(ResSize);
+}
+
+static void writeResFileHeader(char *&Buf) {
+  memcpy(Buf, COFF::WinResMagic, sizeof(COFF::WinResMagic));
+  Buf += sizeof(COFF::WinResMagic);
+  memset(Buf, 0, object::WIN_RES_NULL_ENTRY_SIZE);
+  Buf += object::WIN_RES_NULL_ENTRY_SIZE;
+}
+
+static void writeResEntryHeader(char *&Buf, size_t ManifestSize) {
+  // Write the prefix.
+  auto *Prefix = reinterpret_cast<object::WinResHeaderPrefix *>(Buf);
+  Prefix->DataSize = ManifestSize;
+  Prefix->HeaderSize = sizeof(object::WinResHeaderPrefix) +
+                       sizeof(object::WinResIDs) +
+                       sizeof(object::WinResHeaderSuffix);
+  Buf += sizeof(object::WinResHeaderPrefix);
+
+  // Write the Type/Name IDs.
+  auto *IDs = reinterpret_cast<object::WinResIDs *>(Buf);
+  IDs->setType(RT_MANIFEST);
+  IDs->setName(Config->ManifestID);
+  Buf += sizeof(object::WinResIDs);
+
+  // Write the suffix.
+  auto *Suffix = reinterpret_cast<object::WinResHeaderSuffix *>(Buf);
+  Suffix->DataVersion = 0;
+  Suffix->MemoryFlags = object::WIN_RES_PURE_MOVEABLE;
+  Suffix->Language = SUBLANG_ENGLISH_US;
+  Suffix->Version = 0;
+  Suffix->Characteristics = 0;
+  Buf += sizeof(object::WinResHeaderSuffix);
+}
+
 // Create a resource file containing a manifest XML.
 std::unique_ptr<MemoryBuffer> createManifestRes() {
-  // Create a temporary file for the resource script file.
-  TemporaryFile RCFile("manifest", "rc");
+  std::string Manifest = createManifestXml();
 
-  // Open the temporary file for writing.
-  std::error_code EC;
-  raw_fd_ostream Out(RCFile.Path, EC, sys::fs::F_Text);
-  if (EC)
-    fatal(EC, "failed to open " + RCFile.Path);
-
-  // Write resource script to the RC file.
-  Out << "#define LANG_ENGLISH 9\n"
-      << "#define SUBLANG_DEFAULT 1\n"
-      << "#define APP_MANIFEST " << Config->ManifestID << "\n"
-      << "#define RT_MANIFEST 24\n"
-      << "LANGUAGE LANG_ENGLISH, SUBLANG_DEFAULT\n"
-      << "APP_MANIFEST RT_MANIFEST {\n";
-  quoteAndPrint(Out, createManifestXml());
-  Out << "}\n";
-  Out.close();
-
-  // Create output resource file.
-  TemporaryFile ResFile("output-resource", "res");
-
-  Executor E("rc.exe");
-  E.add("/fo");
-  E.add(ResFile.Path);
-  E.add("/nologo");
-  E.add(RCFile.Path);
-  E.run();
-  return ResFile.getMemoryBuffer();
+  std::unique_ptr<MemoryBuffer> Res =
+      createMemoryBufferForManifestRes(Manifest.size());
+
+  char *Buf = const_cast<char *>(Res->getBufferStart());
+  writeResFileHeader(Buf);
+  writeResEntryHeader(Buf, Manifest.size());
+
+  // Copy the manifest data into the .res file.
+  std::copy(Manifest.begin(), Manifest.end(), Buf);
+  return Res;
 }
 
 void createSideBySideManifest() {
@@ -595,40 +605,22 @@ void checkFailIfMismatch(StringRef Arg) {
 // using cvtres.exe.
 std::unique_ptr<MemoryBuffer>
 convertResToCOFF(const std::vector<MemoryBufferRef> &MBs) {
-  // Create an output file path.
-  TemporaryFile File("resource-file", "obj");
+  object::WindowsResourceParser Parser;
 
-  // Execute cvtres.exe.
-  Executor E("cvtres.exe");
-  E.add("/machine:" + machineToStr(Config->Machine));
-  E.add("/readonly");
-  E.add("/nologo");
-  E.add("/out:" + Twine(File.Path));
-
-  // We must create new files because the memory buffers we have may have no
-  // underlying file still existing on the disk.
-  // It happens if it was created from a TemporaryFile, which usually delete
-  // the file just after creating the MemoryBuffer.
-  std::vector<TemporaryFile> ResFiles;
-  ResFiles.reserve(MBs.size());
   for (MemoryBufferRef MB : MBs) {
-    // We store the temporary file in a vector to avoid deletion
-    // before running cvtres
-    ResFiles.emplace_back("resource-file", "res");
-    TemporaryFile& ResFile = ResFiles.back();
-    // Write the content of the resource in a temporary file
-    std::error_code EC;
-    raw_fd_ostream OS(ResFile.Path, EC, sys::fs::F_None);
-    if (EC)
-      fatal(EC, "failed to open " + ResFile.Path);
-    OS << MB.getBuffer();
-    OS.close();
-
-    E.add(ResFile.Path);
+    std::unique_ptr<object::Binary> Bin = check(object::createBinary(MB));
+    object::WindowsResource *RF = dyn_cast<object::WindowsResource>(Bin.get());
+    if (!RF)
+      fatal("cannot compile non-resource file as resource");
+    if (auto EC = Parser.parse(RF))
+      fatal(EC, "failed to parse .res file");
   }
 
-  E.run();
-  return File.getMemoryBuffer();
+  Expected<std::unique_ptr<MemoryBuffer>> E =
+      llvm::object::writeWindowsResourceCOFF(Config->Machine, Parser);
+  if (!E)
+    fatal(errorToErrorCode(E.takeError()), "failed to write .res to COFF");
+  return std::move(E.get());
 }
 
 // Run MSVC link.exe for given in-memory object files.

lld/test/COFF/combined-resources.test

@@ -4,8 +4,6 @@
 // > rc /fo combined-resources.res /nologo combined-resources.rc
 // > rc /fo combined-resources-2.res /nologo combined-resources-2.rc
 
-# REQUIRES: winres
-
 # RUN: yaml2obj < %p/Inputs/ret42.yaml > %t.obj
 # RUN: lld-link /out:%t.exe /entry:main %t.obj %p/Inputs/resource.res \
 # RUN:   %p/Inputs/combined-resources.res %p/Inputs/combined-resources-2.res

lld/test/COFF/def-name.test

@@ -1,5 +1,3 @@
-# REQUIRES: winres
-
 # RUN: rm -rf %t
 # RUN: mkdir -p %t
 # RUN: cd %t

lld/test/COFF/dll.test

@@ -1,5 +1,3 @@
-# REQUIRES: winres
-
 # RUN: yaml2obj < %p/Inputs/export.yaml > %t.obj
 # RUN: lld-link /out:%t.dll /dll %t.obj /export:exportfn1 /export:exportfn2 \
 # RUN:   /export:mangled

lld/test/COFF/dllimport-gc.test

@@ -1,5 +1,3 @@
-# REQUIRES: winres
-
 # RUN: yaml2obj < %p/Inputs/export.yaml > %t-lib.obj
 # RUN: lld-link /out:%t.dll /dll %t-lib.obj /implib:%t.lib /export:exportfn1
 

lld/test/COFF/manifestinput.test

@@ -1,4 +1,4 @@
-# REQUIRES: winres
+# REQUIRES: win_mt
 
 # RUN: yaml2obj %p/Inputs/ret42.yaml > %t.obj
 # RUN: lld-link /out:%t.exe /entry:main \
@@ -8,3 +8,28 @@
 
 CHECK: <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 CHECK: <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0"><dependency><dependentAssembly><assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="6.0.0.0" processorArchitecture="*" publicKeyToken="6595b64144ccf1df" language="*"></assemblyIdentity></dependentAssembly></dependency><trustInfo><security><requestedPrivileges><requestedExecutionLevel level="requireAdministrator" uiAccess="false"></requestedExecutionLevel></requestedPrivileges></security></trustInfo></assembly>
+
+# RUN: yaml2obj %p/Inputs/ret42.yaml > %t.obj
+# RUN: lld-link /out:%t.exe /entry:main \
+# RUN:   /manifest:embed \
+# RUN:   /manifestuac:"level='requireAdministrator'" \
+# RUN:   /manifestinput:%p/Inputs/manifestinput.test %t.obj
+# RUN: llvm-readobj -coff-resources -file-headers %t.exe | FileCheck %s \
+# RUN:   -check-prefix TEST_EMBED
+
+TEST_EMBED:          ResourceTableRVA: 0x1000
+TEST_EMBED-NEXT:     ResourceTableSize: 0x298
+TEST_EMBED-DAG:      Resources [
+TEST_EMBED-NEXT:       Total Number of Resources: 1 
+TEST_EMBED-DAG:        Number of String Entries: 0
+TEST_EMBED-NEXT:       Number of ID Entries: 1
+TEST_EMBED-NEXT:       Type: kRT_MANIFEST (ID 24) [
+TEST_EMBED-NEXT:         Table Offset: 0x18
+TEST_EMBED-NEXT:         Number of String Entries: 0
+TEST_EMBED-NEXT:         Number of ID Entries: 1
+TEST_EMBED-NEXT:         Name: (ID 1) [
+TEST_EMBED-NEXT:           Table Offset: 0x30
+TEST_EMBED-NEXT:           Number of String Entries: 0
+TEST_EMBED-NEXT:           Number of ID Entries: 1
+TEST_EMBED-NEXT:           Language: (ID 1033) [
+TEST_EMBED-NEXT:             Entry Offset: 0x48

lld/test/COFF/noentry.test

@@ -1,5 +1,3 @@
-# REQUIRES: winres
-
 # RUN: yaml2obj < %p/Inputs/export.yaml > %t.obj
 # RUN: lld-link /out:%t.dll /dll %t.obj
 # RUN: llvm-readobj -file-headers %t.dll | FileCheck -check-prefix=ENTRY %s

lld/test/COFF/out.test

@@ -1,4 +1,3 @@
-# REQUIRES: winres
 # RUN: yaml2obj < %p/Inputs/ret42.yaml > %t.obj
 
 # RUN: mkdir -p %T/out/tmp

lld/test/COFF/resource.test

@@ -1,5 +1,3 @@
-# REQUIRES: winres
-
 # RUN: yaml2obj < %p/Inputs/ret42.yaml > %t.obj
 # RUN: lld-link /out:%t.exe /entry:main %t.obj %p/Inputs/resource.res
 

lld/test/lit.cfg

@@ -264,8 +264,7 @@ llvm_config_cmd.wait()
 # Set a fake constant version so that we get consitent output.
 config.environment['LLD_VERSION'] = 'LLD 1.0'
 
-# Check if Windows resource file compiler exists.
-cvtres = lit.util.which('cvtres', config.environment['PATH'])
-rc = lit.util.which('rc', config.environment['PATH'])
-if cvtres and rc:
-    config.available_features.add('winres')
+# Indirectly check if the mt.exe Microsoft utility exists by searching for
+# cvtres, which always accompanies it.
+if lit.util.which('cvtres', config.environment['PATH']):
+    config.available_features.add('win_mt')

llvm/include/llvm/BinaryFormat/COFF.h

@@ -46,6 +46,12 @@ static const char ClGlObjMagic[] = {
     '\xac', '\x9b', '\xd6', '\xb6', '\x22', '\x26', '\x53', '\xc2',
 };
 
+// The signature bytes that start a .res file.
+static const char WinResMagic[] = {
+    '\x00', '\x00', '\x00', '\x00', '\x20', '\x00', '\x00', '\x00',
+    '\xff', '\xff', '\x00', '\x00', '\xff', '\xff', '\x00', '\x00',
+};
+
 // Sizes in bytes of various things in the COFF format.
 enum {
   Header16Size = 20,

llvm/include/llvm/Object/WindowsResource.h

@@ -43,12 +43,47 @@
 #include <map>
 
 namespace llvm {
-
 namespace object {
 
 class WindowsResource;
 
-enum class Machine { UNKNOWN, ARM, X64, X86 };
+const size_t WIN_RES_MAGIC_SIZE = 16;
+const size_t WIN_RES_NULL_ENTRY_SIZE = 16;
+const uint32_t WIN_RES_HEADER_ALIGNMENT = 4;
+const uint32_t WIN_RES_DATA_ALIGNMENT = 4;
+const uint16_t WIN_RES_PURE_MOVEABLE = 0x0030;
+
+struct WinResHeaderPrefix {
+  support::ulittle32_t DataSize;
+  support::ulittle32_t HeaderSize;
+};
+
+// Type and Name may each either be an integer ID or a string.  This struct is
+// only used in the case where they are both IDs.
+struct WinResIDs {
+  uint16_t TypeFlag;
+  support::ulittle16_t TypeID;
+  uint16_t NameFlag;
+  support::ulittle16_t NameID;
+
+  void setType(uint16_t ID) {
+    TypeFlag = 0xffff;
+    TypeID = ID;
+  }
+
+  void setName(uint16_t ID) {
+    NameFlag = 0xffff;
+    NameID = ID;
+  }
+};
+
+struct WinResHeaderSuffix {
+  support::ulittle32_t DataVersion;
+  support::ulittle16_t MemoryFlags;
+  support::ulittle16_t Language;
+  support::ulittle32_t Version;
+  support::ulittle32_t Characteristics;
+};
 
 class ResourceEntryRef {
 public:
@@ -73,22 +108,14 @@ class ResourceEntryRef {
 
   Error loadNext();
 
-  struct HeaderSuffix {
-    support::ulittle32_t DataVersion;
-    support::ulittle16_t MemoryFlags;
-    support::ulittle16_t Language;
-    support::ulittle32_t Version;
-    support::ulittle32_t Characteristics;
-  };
-
   BinaryStreamReader Reader;
   bool IsStringType;
   ArrayRef<UTF16> Type;
   uint16_t TypeID;
   bool IsStringName;
   ArrayRef<UTF16> Name;
   uint16_t NameID;
-  const HeaderSuffix *Suffix = nullptr;
+  const WinResHeaderSuffix *Suffix = nullptr;
   ArrayRef<uint8_t> Data;
   const WindowsResource *OwningRes = nullptr;
 };

llvm/lib/BinaryFormat/Magic.cpp

@@ -51,7 +51,8 @@ file_magic llvm::identify_magic(StringRef Magic) {
       return file_magic::coff_import_library;
     }
     // Windows resource file
-    if (startswith(Magic, "\0\0\0\0\x20\0\0\0\xFF"))
+    if (Magic.size() >= sizeof(COFF::WinResMagic) &&
+        memcmp(Magic.data(), COFF::WinResMagic, sizeof(COFF::WinResMagic)) == 0)
       return file_magic::windows_resource;
     // 0x0000 = COFF unknown machine type
     if (Magic[1] == 0)