Revert a series of commits to MCJIT to get the build working in CMake

(and hopefully on Windows). The bots have been down most of the day
because of this, and it's not clear to me what all will be required to
fix it.

The commits started with r153205, then r153207, r153208, and r153221.
The first commit seems to be the real culprit, but I couldn't revert
a smaller number of patches.

When resubmitting, r153207 and r153208 should be folded into r153205,
they were simple build fixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153241 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 25 insertions, 270 deletions

diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
index ff4a2c847e..2896c2d556 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyld.cpp
@@ -26,290 +26,45 @@ RuntimeDyldImpl::~RuntimeDyldImpl() {}
 
 namespace llvm {
 
+void RuntimeDyldImpl::extractFunction(StringRef Name, uint8_t *StartAddress,
+                                      uint8_t *EndAddress) {
+  // FIXME: DEPRECATED in favor of by-section allocation.
+  // Allocate memory for the function via the memory manager.
+  uintptr_t Size = EndAddress - StartAddress + 1;
+  uintptr_t AllocSize = Size;
+  uint8_t *Mem = MemMgr->startFunctionBody(Name.data(), AllocSize);
+  assert(Size >= (uint64_t)(EndAddress - StartAddress + 1) &&
+         "Memory manager failed to allocate enough memory!");
+  // Copy the function payload into the memory block.
+  memcpy(Mem, StartAddress, Size);
+  MemMgr->endFunctionBody(Name.data(), Mem, Mem + Size);
+  // Remember where we put it.
+  unsigned SectionID = Sections.size();
+  Sections.push_back(sys::MemoryBlock(Mem, Size));
 
+  // Default the assigned address for this symbol to wherever this
+  // allocated it.
+  SymbolTable[Name] = SymbolLoc(SectionID, 0);
+  DEBUG(dbgs() << "    allocated to [" << Mem << ", " << Mem + Size << "]\n");
+}
 
 // Resolve the relocations for all symbols we currently know about.
 void RuntimeDyldImpl::resolveRelocations() {
-  // First, resolve relocations assotiated with external symbols.
-  resolveSymbols();
-
   // Just iterate over the sections we have and resolve all the relocations
   // in them. Gross overkill, but it gets the job done.
   for (int i = 0, e = Sections.size(); i != e; ++i) {
-    reassignSectionAddress(i, Sections[i].LoadAddress);
+    reassignSectionAddress(i, SectionLoadAddress[i]);
   }
 }
 
 void RuntimeDyldImpl::mapSectionAddress(void *LocalAddress,
                                         uint64_t TargetAddress) {
-  for (unsigned i = 0, e = Sections.size(); i != e; ++i) {
-    if (Sections[i].Address == LocalAddress) {
-      reassignSectionAddress(i, TargetAddress);
-      return;
-    }
-  }
-  llvm_unreachable("Attempting to remap address of unknown section!");
-}
-
-bool RuntimeDyldImpl::loadObject(const MemoryBuffer *InputBuffer) {
-  // FIXME: ObjectFile don't modify MemoryBuffer.
-  //        It should use const MemoryBuffer as parameter.
-  ObjectFile *obj = ObjectFile::
-                      createObjectFile(const_cast<MemoryBuffer*>(InputBuffer));
-
-  Arch = (Triple::ArchType)obj->getArch();
-
-  LocalSymbolMap LocalSymbols;     // Functions and data symbols from the
-                                   // object file.
-  ObjSectionToIDMap LocalSections; // Used sections from the object file
-
-  error_code err;
-
-
-  // Parse symbols
-  DEBUG(dbgs() << "Parse symbols:\n");
-  for (symbol_iterator it = obj->begin_symbols(), itEnd = obj->end_symbols();
-       it != itEnd; it.increment(err)) {
-    if (err) break;
-    object::SymbolRef::Type SymType;
-    StringRef Name;
-    if ((bool)(err = it->getType(SymType))) break;
-    if ((bool)(err = it->getName(Name))) break;
-
-    if (SymType == object::SymbolRef::ST_Function ||
-        SymType == object::SymbolRef::ST_Data) {
-      uint64_t FileOffset;
-      uint32_t flags;
-      StringRef sData;
-      section_iterator sIt = obj->end_sections();
-      if ((bool)(err = it->getFileOffset(FileOffset))) break;
-      if ((bool)(err = it->getFlags(flags))) break;
-      if ((bool)(err = it->getSection(sIt))) break;
-      if (sIt == obj->end_sections()) continue;
-      if ((bool)(err = sIt->getContents(sData))) break;
-      const uint8_t* SymPtr = (const uint8_t*)InputBuffer->getBufferStart() +
-                              (uintptr_t)FileOffset;
-      uintptr_t SectOffset = (uintptr_t)(SymPtr - (const uint8_t*)sData.begin());
-      unsigned SectionID =
-        findOrEmitSection(*sIt,
-                          SymType == object::SymbolRef::ST_Function,
-                          LocalSections);
-      bool isGlobal = flags & SymbolRef::SF_Global;
-      LocalSymbols[Name.data()] = SymbolLoc(SectionID, SectOffset);
-      DEBUG(dbgs() << "\tFileOffset: " << format("%p", (uintptr_t)FileOffset)
-                   << " flags: " << flags
-                   << " SID: " << SectionID
-                   << " Offset: " << format("%p", SectOffset));
-      if (isGlobal)
-        SymbolTable[Name] = SymbolLoc(SectionID, SectOffset);
-    }
-    DEBUG(dbgs() << "\tType: " << SymType << " Name: " << Name << "\n");
-  }
-  if (err) {
-    report_fatal_error(err.message());
-  }
-
-  // Parse and proccess relocations
-  DEBUG(dbgs() << "Parse relocations:\n");
-  for (section_iterator sIt = obj->begin_sections(),
-       sItEnd = obj->end_sections(); sIt != sItEnd; sIt.increment(err)) {
-    if (err) break;
-    bool isFirstRelocation = true;
-    unsigned SectionID = 0;
-    StubMap Stubs;
-
-    for (relocation_iterator it = sIt->begin_relocations(),
-         itEnd = sIt->end_relocations(); it != itEnd; it.increment(err)) {
-      if (err) break;
-
-      // If it's first relocation in this section, find its SectionID
-      if (isFirstRelocation) {
-        SectionID = findOrEmitSection(*sIt, true, LocalSections);
-        DEBUG(dbgs() << "\tSectionID: " << SectionID << "\n");
-        isFirstRelocation = false;
-      }
-
-      ObjRelocationInfo RI;
-      RI.SectionID = SectionID;
-      if ((bool)(err = it->getAdditionalInfo(RI.AdditionalInfo))) break;
-      if ((bool)(err = it->getOffset(RI.Offset))) break;
-      if ((bool)(err = it->getSymbol(RI.Symbol))) break;
-      if ((bool)(err = it->getType(RI.Type))) break;
-
-      DEBUG(dbgs() << "\t\tAddend: " << RI.AdditionalInfo
-                   << " Offset: " << format("%p", (uintptr_t)RI.Offset)
-                   << " Type: " << (uint32_t)(RI.Type & 0xffffffffL)
-                   << "\n");
-      processRelocationRef(RI, *obj, LocalSections, LocalSymbols, Stubs);
-    }
-    if (err) {
-      report_fatal_error(err.message());
-    }
-  }
-  return false;
-}
-
-unsigned RuntimeDyldImpl::emitSection(const SectionRef &Section,
-                                      bool IsCode) {
-
-  unsigned StubBufSize = 0,
-           StubSize = getMaxStubSize();
-  error_code err;
-  if (StubSize > 0) {
-    for (relocation_iterator it = Section.begin_relocations(),
-         itEnd = Section.end_relocations(); it != itEnd; it.increment(err))
-      StubBufSize += StubSize;
-  }
-  StringRef data;
-  uint64_t Alignment64;
-  if ((bool)(err = Section.getContents(data))) report_fatal_error(err.message());
-  if ((bool)(err = Section.getAlignment(Alignment64)))
-    report_fatal_error(err.message());
-
-  unsigned Alignment = (unsigned)Alignment64 & 0xffffffffL;
-  unsigned DataSize = data.size();
-  unsigned Allocate = DataSize + StubBufSize;
-  unsigned SectionID = Sections.size();
-  const char *pData = data.data();
-  uint8_t *Addr = IsCode
-    ? MemMgr->allocateCodeSection(Allocate, Alignment, SectionID)
-    : MemMgr->allocateDataSection(Allocate, Alignment, SectionID);
-
-  memcpy(Addr, pData, DataSize);
-  DEBUG(dbgs() << "emitSection SectionID: " << SectionID
-               << " obj addr: " << format("%p", pData)
-               << " new addr: " << format("%p", Addr)
-               << " DataSize: " << DataSize
-               << " StubBufSize: " << StubBufSize
-               << " Allocate: " << Allocate
-               << "\n");
-  Sections.push_back(SectionEntry(Addr, Allocate, DataSize,(uintptr_t)pData));
-  return SectionID;
-}
-
-unsigned RuntimeDyldImpl::
-findOrEmitSection(const SectionRef &Section, bool IsCode,
-                  ObjSectionToIDMap &LocalSections) {
-
-  unsigned SectionID = 0;
-  ObjSectionToIDMap::iterator sIDIt = LocalSections.find(Section);
-  if (sIDIt != LocalSections.end())
-    SectionID = sIDIt->second;
-  else {
-    SectionID = emitSection(Section, IsCode);
-    LocalSections[Section] = SectionID;
-  }
-  return SectionID;
-}
-
-void RuntimeDyldImpl::AddRelocation(const RelocationValueRef &Value,
-                                   unsigned SectionID, uintptr_t Offset,
-                                   uint32_t RelType) {
-  DEBUG(dbgs() << "AddRelocation SymNamePtr: " << format("%p", Value.SymbolName)
-               << " SID: " << Value.SectionID
-               << " Addend: " << format("%p", Value.Addend)
-               << " Offset: " << format("%p", Offset)
-               << " RelType: " << format("%x", RelType)
-               << "\n");
-
-  if (Value.SymbolName == 0) {
-    Relocations[Value.SectionID].push_back(RelocationEntry(
-      SectionID,
-      Offset,
-      RelType,
-      Value.Addend));
-  } else
-    SymbolRelocations[Value.SymbolName].push_back(RelocationEntry(
-      SectionID,
-      Offset,
-      RelType,
-      Value.Addend));
-}
-
-uint8_t *RuntimeDyldImpl::createStubFunction(uint8_t *Addr) {
-  // TODO: There is only ARM far stub now. We should add the Thumb stub,
-  // and stubs for branches Thumb - ARM and ARM - Thumb.
-  if (Arch == Triple::arm) {
-    uint32_t *StubAddr = (uint32_t*)Addr;
-    *StubAddr = 0xe51ff004; // ldr pc,<label>
-    return (uint8_t*)++StubAddr;
-  }
-  else
-    return Addr;
+  assert(SectionLocalMemToID.count(LocalAddress) &&
+         "Attempting to remap address of unknown section!");
+  unsigned SectionID = SectionLocalMemToID[LocalAddress];
+  reassignSectionAddress(SectionID, TargetAddress);
 }
 
-// Assign an address to a symbol name and resolve all the relocations
-// associated with it.
-void RuntimeDyldImpl::reassignSectionAddress(unsigned SectionID,
-                                             uint64_t Addr) {
-  // The address to use for relocation resolution is not
-  // the address of the local section buffer. We must be doing
-  // a remote execution environment of some sort. Re-apply any
-  // relocations referencing this section with the given address.
-  //
-  // Addr is a uint64_t because we can't assume the pointer width
-  // of the target is the same as that of the host. Just use a generic
-  // "big enough" type.
-  Sections[SectionID].LoadAddress = Addr;
-  DEBUG(dbgs() << "Resolving relocations Section #" << SectionID
-          << "\t" << format("%p", (uint8_t *)Addr)
-          << "\n");
-  resolveRelocationList(Relocations[SectionID], Addr);
-}
-
-void RuntimeDyldImpl::resolveRelocationEntry(const RelocationEntry &RE,
-                                             uint64_t Value) {
-    uint8_t *Target = Sections[RE.SectionID].Address + RE.Offset;
-    DEBUG(dbgs() << "\tSectionID: " << RE.SectionID
-          << " + " << RE.Offset << " (" << format("%p", Target) << ")"
-          << " Data: " << RE.Data
-          << " Addend: " << RE.Addend
-          << "\n");
-
-    resolveRelocation(Target, Sections[RE.SectionID].LoadAddress + RE.Offset,
-                      Value, RE.Data, RE.Addend);
-}
-
-void RuntimeDyldImpl::resolveRelocationList(const RelocationList &Relocs,
-                                            uint64_t Value) {
-  for (unsigned i = 0, e = Relocs.size(); i != e; ++i) {
-    resolveRelocationEntry(Relocs[i], Value);
-  }
-}
-
-// resolveSymbols - Resolve any relocations to the specified symbols if
-// we know where it lives.
-void RuntimeDyldImpl::resolveSymbols() {
-  StringMap<RelocationList>::iterator it = SymbolRelocations.begin(),
-                                      itEnd = SymbolRelocations.end();
-  for (; it != itEnd; it++) {
-    StringRef Name = it->first();
-    RelocationList &Relocs = it->second;
-    StringMap<SymbolLoc>::const_iterator Loc = SymbolTable.find(Name);
-    if (Loc == SymbolTable.end()) {
-      // This is an external symbol, try to get it address from
-      // MemoryManager.
-      uint8_t *Addr = (uint8_t*) MemMgr->getPointerToNamedFunction(Name.data(),
-                                                                   true);
-      DEBUG(dbgs() << "Resolving relocations Name: " << Name
-              << "\t" << format("%p", Addr)
-              << "\n");
-      resolveRelocationList(Relocs, (uintptr_t)Addr);
-    } else {
-      // Change the relocation to be section relative rather than symbol
-      // relative and move it to the resolved relocation list.
-      DEBUG(dbgs() << "Resolving symbol '" << Name << "'\n");
-      for (int i = 0, e = Relocs.size(); i != e; ++i) {
-        RelocationEntry Entry = Relocs[i];
-        Entry.Addend += Loc->second.second;
-        Relocations[Loc->second.first].push_back(Entry);
-      }
-      Relocs.clear();
-    }
-  }
-}
-
-
 //===----------------------------------------------------------------------===//
 // RuntimeDyld class implementation
 RuntimeDyld::RuntimeDyld(RTDyldMemoryManager *mm) {