Add a WITH_CLANG_EXTRAS option for src.conf(5), disabled by default,

that builds the following additional llvm/clang tools:

- bugpoint
- llc
- lli
- llvm-ar
- llvm-as
- llvm-bcanalyzer
- llvm-diff
- llvm-dis
- llvm-extract
- llvm-ld
- llvm-link
- llvm-mc
- llvm-nm
- llvm-objdump
- llvm-prof
- llvm-ranlib
- llvm-rtdyld
- llvm-stub
- macho-dump
- opt

These tools are mainly useful for people that want to manipulate llvm
bitcode (.bc) and llvm assembly language (.ll) files, or want to tinker
with llvm and clang themselves.

MFC after:	2 weeks

1 files changed, 151 insertions, 0 deletions

diff --git a/contrib/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp b/contrib/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp
new file mode 100644
index 0000000..ec9d652
--- /dev/null
+++ b/contrib/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp
@@ -0,0 +1,151 @@
+//===-- llvm-rtdyld.cpp - MCJIT Testing Tool ------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This is a testing tool for use with the MC-JIT LLVM components.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ExecutionEngine/RuntimeDyld.h"
+#include "llvm/Object/MachOObject.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Memory.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/system_error.h"
+using namespace llvm;
+using namespace llvm::object;
+
+static cl::list<std::string>
+InputFileList(cl::Positional, cl::ZeroOrMore,
+              cl::desc("<input file>"));
+
+enum ActionType {
+  AC_Execute
+};
+
+static cl::opt<ActionType>
+Action(cl::desc("Action to perform:"),
+       cl::init(AC_Execute),
+       cl::values(clEnumValN(AC_Execute, "execute",
+                             "Load, link, and execute the inputs."),
+                  clEnumValEnd));
+
+static cl::opt<std::string>
+EntryPoint("entry",
+           cl::desc("Function to call as entry point."),
+           cl::init("_main"));
+
+/* *** */
+
+// A trivial memory manager that doesn't do anything fancy, just uses the
+// support library allocation routines directly.
+class TrivialMemoryManager : public RTDyldMemoryManager {
+public:
+  SmallVector<sys::MemoryBlock, 16> FunctionMemory;
+
+  uint8_t *startFunctionBody(const char *Name, uintptr_t &Size);
+  void endFunctionBody(const char *Name, uint8_t *FunctionStart,
+                       uint8_t *FunctionEnd);
+};
+
+uint8_t *TrivialMemoryManager::startFunctionBody(const char *Name,
+                                                 uintptr_t &Size) {
+  return (uint8_t*)sys::Memory::AllocateRWX(Size, 0, 0).base();
+}
+
+void TrivialMemoryManager::endFunctionBody(const char *Name,
+                                           uint8_t *FunctionStart,
+                                           uint8_t *FunctionEnd) {
+  uintptr_t Size = FunctionEnd - FunctionStart + 1;
+  FunctionMemory.push_back(sys::MemoryBlock(FunctionStart, Size));
+}
+
+static const char *ProgramName;
+
+static void Message(const char *Type, const Twine &Msg) {
+  errs() << ProgramName << ": " << Type << ": " << Msg << "\n";
+}
+
+static int Error(const Twine &Msg) {
+  Message("error", Msg);
+  return 1;
+}
+
+/* *** */
+
+static int executeInput() {
+  // Instantiate a dynamic linker.
+  TrivialMemoryManager *MemMgr = new TrivialMemoryManager;
+  RuntimeDyld Dyld(MemMgr);
+
+  // If we don't have any input files, read from stdin.
+  if (!InputFileList.size())
+    InputFileList.push_back("-");
+  for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
+    // Load the input memory buffer.
+    OwningPtr<MemoryBuffer> InputBuffer;
+    if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFileList[i],
+                                                     InputBuffer))
+      return Error("unable to read input: '" + ec.message() + "'");
+
+    // Load the object file into it.
+    if (Dyld.loadObject(InputBuffer.take())) {
+      return Error(Dyld.getErrorString());
+    }
+  }
+
+  // Resolve all the relocations we can.
+  Dyld.resolveRelocations();
+
+  // FIXME: Error out if there are unresolved relocations.
+
+  // Get the address of the entry point (_main by default).
+  void *MainAddress = Dyld.getSymbolAddress(EntryPoint);
+  if (MainAddress == 0)
+    return Error("no definition for '" + EntryPoint + "'");
+
+  // Invalidate the instruction cache for each loaded function.
+  for (unsigned i = 0, e = MemMgr->FunctionMemory.size(); i != e; ++i) {
+    sys::MemoryBlock &Data = MemMgr->FunctionMemory[i];
+    // Make sure the memory is executable.
+    std::string ErrorStr;
+    sys::Memory::InvalidateInstructionCache(Data.base(), Data.size());
+    if (!sys::Memory::setExecutable(Data, &ErrorStr))
+      return Error("unable to mark function executable: '" + ErrorStr + "'");
+  }
+
+  // Dispatch to _main().
+  errs() << "loaded '" << EntryPoint << "' at: " << (void*)MainAddress << "\n";
+
+  int (*Main)(int, const char**) =
+    (int(*)(int,const char**)) uintptr_t(MainAddress);
+  const char **Argv = new const char*[2];
+  // Use the name of the first input object module as argv[0] for the target.
+  Argv[0] = InputFileList[0].c_str();
+  Argv[1] = 0;
+  return Main(1, Argv);
+}
+
+int main(int argc, char **argv) {
+  ProgramName = argv[0];
+  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
+
+  cl::ParseCommandLineOptions(argc, argv, "llvm MC-JIT tool\n");
+
+  switch (Action) {
+  default:
+  case AC_Execute:
+    return executeInput();
+  }
+
+  return 0;
+}