Merge llvm trunk r238337 from ^/vendor/llvm/dist, resolve conflicts, and

preserve our customizations, where necessary.

7 files changed, 258 insertions, 151 deletions

diff --git a/contrib/llvm/lib/Support/Windows/COM.inc b/contrib/llvm/lib/Support/Windows/COM.inc
new file mode 100644
index 0000000..0c50d6f
--- /dev/null
+++ b/contrib/llvm/lib/Support/Windows/COM.inc
@@ -0,0 +1,37 @@
+//===- llvm/Support/Windows/COM.inc - Windows COM Implementation *- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Windows portion of COM support.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Windows code.
+//===----------------------------------------------------------------------===//
+
+#include <objbase.h>
+
+namespace llvm {
+namespace sys {
+
+InitializeCOMRAII::InitializeCOMRAII(COMThreadingMode Threading,
+                                     bool SpeedOverMemory) {
+  DWORD Coinit = 0;
+  if (Threading == COMThreadingMode::SingleThreaded)
+    Coinit |= COINIT_APARTMENTTHREADED;
+  else
+    Coinit |= COINIT_MULTITHREADED;
+  if (SpeedOverMemory)
+    Coinit |= COINIT_SPEED_OVER_MEMORY;
+  ::CoInitializeEx(nullptr, Coinit);
+}
+
+InitializeCOMRAII::~InitializeCOMRAII() { ::CoUninitialize(); }
+}
+}
diff --git a/contrib/llvm/lib/Support/Windows/Path.inc b/contrib/llvm/lib/Support/Windows/Path.inc
index d8b5702..72da7c5 100644
--- a/contrib/llvm/lib/Support/Windows/Path.inc
+++ b/contrib/llvm/lib/Support/Windows/Path.inc
@@ -46,10 +46,6 @@ using llvm::sys::windows::UTF8ToUTF16;
 using llvm::sys::windows::UTF16ToUTF8;
 using llvm::sys::path::widenPath;
 
-static std::error_code windows_error(DWORD E) {
-  return mapWindowsError(E);
-}
-
 static bool is_separator(const wchar_t value) {
   switch (value) {
   case L'\\':
@@ -83,7 +79,7 @@ std::error_code widenPath(const Twine &Path8,
   else {
     CurPathLen = ::GetCurrentDirectoryW(0, NULL);
     if (CurPathLen == 0)
-      return windows_error(::GetLastError());
+      return mapWindowsError(::GetLastError());
   }
 
   // Would the absolute path be longer than our limit?
@@ -174,7 +170,7 @@ std::error_code current_path(SmallVectorImpl<char> &result) {
 
     // A zero return value indicates a failure other than insufficient space.
     if (len == 0)
-      return windows_error(::GetLastError());
+      return mapWindowsError(::GetLastError());
 
     // If there's insufficient space, the len returned is larger than the len
     // given.
@@ -195,7 +191,7 @@ std::error_code create_directory(const Twine &path, bool IgnoreExisting) {
   if (!::CreateDirectoryW(path_utf16.begin(), NULL)) {
     DWORD LastError = ::GetLastError();
     if (LastError != ERROR_ALREADY_EXISTS || !IgnoreExisting)
-      return windows_error(LastError);
+      return mapWindowsError(LastError);
   }
 
   return std::error_code();
@@ -212,7 +208,7 @@ std::error_code create_link(const Twine &to, const Twine &from) {
     return ec;
 
   if (!::CreateHardLinkW(wide_from.begin(), wide_to.begin(), NULL))
-    return windows_error(::GetLastError());
+    return mapWindowsError(::GetLastError());
 
   return std::error_code();
 }
@@ -232,14 +228,14 @@ std::error_code remove(const Twine &path, bool IgnoreNonExisting) {
 
   if (ST.type() == file_type::directory_file) {
     if (!::RemoveDirectoryW(c_str(path_utf16))) {
-      std::error_code EC = windows_error(::GetLastError());
+      std::error_code EC = mapWindowsError(::GetLastError());
       if (EC != errc::no_such_file_or_directory || !IgnoreNonExisting)
         return EC;
     }
     return std::error_code();
   }
   if (!::DeleteFileW(c_str(path_utf16))) {
-    std::error_code EC = windows_error(::GetLastError());
+    std::error_code EC = mapWindowsError(::GetLastError());
     if (EC != errc::no_such_file_or_directory || !IgnoreNonExisting)
       return EC;
   }
@@ -261,6 +257,7 @@ std::error_code rename(const Twine &from, const Twine &to) {
                       MOVEFILE_COPY_ALLOWED | MOVEFILE_REPLACE_EXISTING))
       return std::error_code();
     DWORD LastError = ::GetLastError();
+    ec = mapWindowsError(LastError);
     if (LastError != ERROR_ACCESS_DENIED)
       break;
     // Retry MoveFile() at ACCESS_DENIED.
@@ -294,7 +291,7 @@ std::error_code access(const Twine &Path, AccessMode Mode) {
     DWORD LastError = ::GetLastError();
     if (LastError != ERROR_FILE_NOT_FOUND &&
         LastError != ERROR_PATH_NOT_FOUND)
-      return windows_error(LastError);
+      return mapWindowsError(LastError);
     return errc::no_such_file_or_directory;
   }
 
@@ -358,7 +355,7 @@ static std::error_code getStatus(HANDLE FileHandle, file_status &Result) {
   case FILE_TYPE_UNKNOWN: {
     DWORD Err = ::GetLastError();
     if (Err != NO_ERROR)
-      return windows_error(Err);
+      return mapWindowsError(Err);
     Result = file_status(file_type::type_unknown);
     return std::error_code();
   }
@@ -397,7 +394,7 @@ handle_status_error:
     Result = file_status(file_type::type_unknown);
   else
     Result = file_status(file_type::status_error);
-  return windows_error(LastError);
+  return mapWindowsError(LastError);
 }
 
 std::error_code status(const Twine &path, file_status &result) {
@@ -454,7 +451,7 @@ std::error_code setLastModificationAndAccessTime(int FD, TimeValue Time) {
   FT.dwHighDateTime = UI.HighPart;
   HANDLE FileHandle = reinterpret_cast<HANDLE>(_get_osfhandle(FD));
   if (!SetFileTime(FileHandle, NULL, &FT, &FT))
-    return windows_error(::GetLastError());
+    return mapWindowsError(::GetLastError());
   return std::error_code();
 }
 
@@ -481,7 +478,7 @@ std::error_code mapped_file_region::init(int FD, uint64_t Offset,
                            (Offset + Size) & 0xffffffff,
                            0);
   if (FileMappingHandle == NULL) {
-    std::error_code ec = windows_error(GetLastError());
+    std::error_code ec = mapWindowsError(GetLastError());
     return ec;
   }
 
@@ -497,7 +494,7 @@ std::error_code mapped_file_region::init(int FD, uint64_t Offset,
                             Offset & 0xffffffff,
                             Size);
   if (Mapping == NULL) {
-    std::error_code ec = windows_error(GetLastError());
+    std::error_code ec = mapWindowsError(GetLastError());
     ::CloseHandle(FileMappingHandle);
     return ec;
   }
@@ -506,7 +503,7 @@ std::error_code mapped_file_region::init(int FD, uint64_t Offset,
     MEMORY_BASIC_INFORMATION mbi;
     SIZE_T Result = VirtualQuery(Mapping, &mbi, sizeof(mbi));
     if (Result == 0) {
-      std::error_code ec = windows_error(GetLastError());
+      std::error_code ec = mapWindowsError(GetLastError());
       ::UnmapViewOfFile(Mapping);
       ::CloseHandle(FileMappingHandle);
       return ec;
@@ -575,7 +572,7 @@ std::error_code detail::directory_iterator_construct(detail::DirIterState &it,
   WIN32_FIND_DATAW FirstFind;
   ScopedFindHandle FindHandle(::FindFirstFileW(c_str(path_utf16), &FirstFind));
   if (!FindHandle)
-    return windows_error(::GetLastError());
+    return mapWindowsError(::GetLastError());
 
   size_t FilenameLen = ::wcslen(FirstFind.cFileName);
   while ((FilenameLen == 1 && FirstFind.cFileName[0] == L'.') ||
@@ -586,7 +583,7 @@ std::error_code detail::directory_iterator_construct(detail::DirIterState &it,
       // Check for end.
       if (LastError == ERROR_NO_MORE_FILES)
         return detail::directory_iterator_destruct(it);
-      return windows_error(LastError);
+      return mapWindowsError(LastError);
     } else
       FilenameLen = ::wcslen(FirstFind.cFileName);
 
@@ -599,8 +596,8 @@ std::error_code detail::directory_iterator_construct(detail::DirIterState &it,
 
   it.IterationHandle = intptr_t(FindHandle.take());
   SmallString<128> directory_entry_path(path);
-  path::append(directory_entry_path, directory_entry_name_utf8.str());
-  it.CurrentEntry = directory_entry(directory_entry_path.str());
+  path::append(directory_entry_path, directory_entry_name_utf8);
+  it.CurrentEntry = directory_entry(directory_entry_path);
 
   return std::error_code();
 }
@@ -621,7 +618,7 @@ std::error_code detail::directory_iterator_increment(detail::DirIterState &it) {
     // Check for end.
     if (LastError == ERROR_NO_MORE_FILES)
       return detail::directory_iterator_destruct(it);
-    return windows_error(LastError);
+    return mapWindowsError(LastError);
   }
 
   size_t FilenameLen = ::wcslen(FindData.cFileName);
@@ -651,7 +648,7 @@ std::error_code openFileForRead(const Twine &Name, int &ResultFD) {
                            OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
   if (H == INVALID_HANDLE_VALUE) {
     DWORD LastError = ::GetLastError();
-    std::error_code EC = windows_error(LastError);
+    std::error_code EC = mapWindowsError(LastError);
     // Provide a better error message when trying to open directories.
     // This only runs if we failed to open the file, so there is probably
     // no performances issues.
@@ -665,7 +662,7 @@ std::error_code openFileForRead(const Twine &Name, int &ResultFD) {
   int FD = ::_open_osfhandle(intptr_t(H), 0);
   if (FD == -1) {
     ::CloseHandle(H);
-    return windows_error(ERROR_INVALID_HANDLE);
+    return mapWindowsError(ERROR_INVALID_HANDLE);
   }
 
   ResultFD = FD;
@@ -701,7 +698,7 @@ std::error_code openFileForWrite(const Twine &Name, int &ResultFD,
 
   if (H == INVALID_HANDLE_VALUE) {
     DWORD LastError = ::GetLastError();
-    std::error_code EC = windows_error(LastError);
+    std::error_code EC = mapWindowsError(LastError);
     // Provide a better error message when trying to open directories.
     // This only runs if we failed to open the file, so there is probably
     // no performances issues.
@@ -722,7 +719,7 @@ std::error_code openFileForWrite(const Twine &Name, int &ResultFD,
   int FD = ::_open_osfhandle(intptr_t(H), OpenFlags);
   if (FD == -1) {
     ::CloseHandle(H);
-    return windows_error(ERROR_INVALID_HANDLE);
+    return mapWindowsError(ERROR_INVALID_HANDLE);
   }
 
   ResultFD = FD;
@@ -799,7 +796,7 @@ std::error_code UTF8ToUTF16(llvm::StringRef utf8,
                                     utf8.size(), utf16.begin(), 0);
 
     if (len == 0)
-      return windows_error(::GetLastError());
+      return mapWindowsError(::GetLastError());
 
     utf16.reserve(len + 1);
     utf16.set_size(len);
@@ -808,7 +805,7 @@ std::error_code UTF8ToUTF16(llvm::StringRef utf8,
                                 utf8.size(), utf16.begin(), utf16.size());
 
     if (len == 0)
-      return windows_error(::GetLastError());
+      return mapWindowsError(::GetLastError());
   }
 
   // Make utf16 null terminated.
@@ -828,7 +825,7 @@ std::error_code UTF16ToCodePage(unsigned codepage, const wchar_t *utf16,
                                     0, NULL, NULL);
 
     if (len == 0)
-      return windows_error(::GetLastError());
+      return mapWindowsError(::GetLastError());
 
     utf8.reserve(len);
     utf8.set_size(len);
@@ -838,7 +835,7 @@ std::error_code UTF16ToCodePage(unsigned codepage, const wchar_t *utf16,
                                 utf8.size(), NULL, NULL);
 
     if (len == 0)
-      return windows_error(::GetLastError());
+      return mapWindowsError(::GetLastError());
   }
 
   // Make utf8 null terminated.
diff --git a/contrib/llvm/lib/Support/Windows/Process.inc b/contrib/llvm/lib/Support/Windows/Process.inc
index 854eac7..8164956 100644
--- a/contrib/llvm/lib/Support/Windows/Process.inc
+++ b/contrib/llvm/lib/Support/Windows/Process.inc
@@ -156,10 +156,6 @@ Optional<std::string> Process::GetEnv(StringRef Name) {
   return std::string(Res.data());
 }
 
-static std::error_code windows_error(DWORD E) {
-  return mapWindowsError(E);
-}
-
 static void AllocateAndPush(const SmallVectorImpl<char> &S,
                             SmallVectorImpl<const char *> &Vector,
                             SpecificBumpPtrAllocator<char> &Allocator) {
@@ -235,7 +231,7 @@ Process::GetArgumentVector(SmallVectorImpl<const char *> &Args,
   wchar_t **UnicodeCommandLine =
       CommandLineToArgvW(GetCommandLineW(), &ArgCount);
   if (!UnicodeCommandLine)
-    return windows_error(::GetLastError());
+    return mapWindowsError(::GetLastError());
 
   Args.reserve(ArgCount);
   std::error_code ec;
@@ -329,6 +325,16 @@ class DefaultColors
 };
 
 DefaultColors defaultColors;
+
+WORD fg_color(WORD color) {
+  return color & (FOREGROUND_BLUE | FOREGROUND_GREEN |
+                  FOREGROUND_INTENSITY | FOREGROUND_RED);
+}
+
+WORD bg_color(WORD color) {
+  return color & (BACKGROUND_BLUE | BACKGROUND_GREEN |
+                  BACKGROUND_INTENSITY | BACKGROUND_RED);
+}
 }
 
 bool Process::ColorNeedsFlush() {
@@ -350,6 +356,7 @@ const char *Process::OutputBold(bool bg) {
 const char *Process::OutputColor(char code, bool bold, bool bg) {
   if (UseANSI) return colorcodes[bg?1:0][bold?1:0][code&7];
 
+  WORD current = DefaultColors::GetCurrentColor();
   WORD colors;
   if (bg) {
     colors = ((code&1) ? BACKGROUND_RED : 0) |
@@ -357,12 +364,14 @@ const char *Process::OutputColor(char code, bool bold, bool bg) {
       ((code&4) ? BACKGROUND_BLUE : 0);
     if (bold)
       colors |= BACKGROUND_INTENSITY;
+    colors |= fg_color(current);
   } else {
     colors = ((code&1) ? FOREGROUND_RED : 0) |
       ((code&2) ? FOREGROUND_GREEN : 0 ) |
       ((code&4) ? FOREGROUND_BLUE : 0);
     if (bold)
       colors |= FOREGROUND_INTENSITY;
+    colors |= bg_color(current);
   }
   SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), colors);
   return 0;
diff --git a/contrib/llvm/lib/Support/Windows/Program.inc b/contrib/llvm/lib/Support/Windows/Program.inc
index c370077..75685de 100644
--- a/contrib/llvm/lib/Support/Windows/Program.inc
+++ b/contrib/llvm/lib/Support/Windows/Program.inc
@@ -434,7 +434,8 @@ ProcessInfo sys::Wait(const ProcessInfo &PI, unsigned SecondsToWait,
   DWORD status;
   BOOL rc = GetExitCodeProcess(PI.ProcessHandle, &status);
   DWORD err = GetLastError();
-  CloseHandle(PI.ProcessHandle);
+  if (err != ERROR_INVALID_HANDLE)
+    CloseHandle(PI.ProcessHandle);
 
   if (!rc) {
     SetLastError(err);
diff --git a/contrib/llvm/lib/Support/Windows/Signals.inc b/contrib/llvm/lib/Support/Windows/Signals.inc
index 35ba6f8..6006499 100644
--- a/contrib/llvm/lib/Support/Windows/Signals.inc
+++ b/contrib/llvm/lib/Support/Windows/Signals.inc
@@ -10,12 +10,15 @@
 // This file provides the Win32 specific implementation of the Signals class.
 //
 //===----------------------------------------------------------------------===//
-
 #include "llvm/Support/FileSystem.h"
 #include <algorithm>
+#include <signal.h>
 #include <stdio.h>
 #include <vector>
 
+#include "llvm/Support/Format.h"
+#include "llvm/Support/raw_ostream.h"
+
 // The Windows.h header must be after LLVM and standard headers.
 #include "WindowsSupport.h"
 
@@ -165,13 +168,97 @@ static std::vector<std::string> *FilesToRemove = NULL;
 static std::vector<std::pair<void(*)(void*), void*> > *CallBacksToRun = 0;
 static bool RegisteredUnhandledExceptionFilter = false;
 static bool CleanupExecuted = false;
-static bool ExitOnUnhandledExceptions = false;
 static PTOP_LEVEL_EXCEPTION_FILTER OldFilter = NULL;
 
 // Windows creates a new thread to execute the console handler when an event
 // (such as CTRL/C) occurs.  This causes concurrency issues with the above
 // globals which this critical section addresses.
 static CRITICAL_SECTION CriticalSection;
+static bool CriticalSectionInitialized = false;
+
+static void PrintStackTraceForThread(llvm::raw_ostream &OS, HANDLE hProcess,
+                                     HANDLE hThread, STACKFRAME64 &StackFrame,
+                                     CONTEXT *Context) {
+  DWORD machineType;
+#if defined(_M_X64)
+  machineType = IMAGE_FILE_MACHINE_AMD64;
+#else
+  machineType = IMAGE_FILE_MACHINE_I386;
+#endif
+
+  // Initialize the symbol handler.
+  SymSetOptions(SYMOPT_DEFERRED_LOADS | SYMOPT_LOAD_LINES);
+  SymInitialize(hProcess, NULL, TRUE);
+
+  while (true) {
+    if (!StackWalk64(machineType, hProcess, hThread, &StackFrame, Context, NULL,
+                     SymFunctionTableAccess64, SymGetModuleBase64, NULL)) {
+      break;
+    }
+
+    if (StackFrame.AddrFrame.Offset == 0)
+      break;
+
+    using namespace llvm;
+    // Print the PC in hexadecimal.
+    DWORD64 PC = StackFrame.AddrPC.Offset;
+#if defined(_M_X64)
+    OS << format("0x%016llX", PC);
+#elif defined(_M_IX86)
+    OS << format("0x%08lX", static_cast<DWORD>(PC));
+#endif
+
+// Print the parameters.  Assume there are four.
+#if defined(_M_X64)
+    OS << format(" (0x%016llX 0x%016llX 0x%016llX 0x%016llX)",
+            StackFrame.Params[0], StackFrame.Params[1], StackFrame.Params[2],
+            StackFrame.Params[3]);
+#elif defined(_M_IX86)
+    OS << format(" (0x%08lX 0x%08lX 0x%08lX 0x%08lX)",
+            static_cast<DWORD>(StackFrame.Params[0]),
+            static_cast<DWORD>(StackFrame.Params[1]),
+            static_cast<DWORD>(StackFrame.Params[2]),
+            static_cast<DWORD>(StackFrame.Params[3]));
+#endif
+    // Verify the PC belongs to a module in this process.
+    if (!SymGetModuleBase64(hProcess, PC)) {
+      OS << " <unknown module>\n";
+      continue;
+    }
+
+    // Print the symbol name.
+    char buffer[512];
+    IMAGEHLP_SYMBOL64 *symbol = reinterpret_cast<IMAGEHLP_SYMBOL64 *>(buffer);
+    memset(symbol, 0, sizeof(IMAGEHLP_SYMBOL64));
+    symbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
+    symbol->MaxNameLength = 512 - sizeof(IMAGEHLP_SYMBOL64);
+
+    DWORD64 dwDisp;
+    if (!SymGetSymFromAddr64(hProcess, PC, &dwDisp, symbol)) {
+      OS << '\n';
+      continue;
+    }
+
+    buffer[511] = 0;
+    if (dwDisp > 0)
+      OS << format(", %s() + 0x%llX bytes(s)", (const char*)symbol->Name,
+                   dwDisp);
+    else
+      OS << format(", %s", (const char*)symbol->Name);
+
+    // Print the source file and line number information.
+    IMAGEHLP_LINE64 line = {};
+    DWORD dwLineDisp;
+    line.SizeOfStruct = sizeof(line);
+    if (SymGetLineFromAddr64(hProcess, PC, &dwLineDisp, &line)) {
+      OS << format(", %s, line %lu", line.FileName, line.LineNumber);
+      if (dwLineDisp > 0)
+        OS << format(" + 0x%lX byte(s)", dwLineDisp);
+    }
+
+    OS << '\n';
+  }
+}
 
 namespace llvm {
 
@@ -184,7 +271,8 @@ namespace llvm {
 /// AvoidMessageBoxHook - Emulates hitting "retry" from an "abort, retry,
 /// ignore" CRT debug report dialog.  "retry" raises an exception which
 /// ultimately triggers our stack dumper.
-static int AvoidMessageBoxHook(int ReportType, char *Message, int *Return) {
+static LLVM_ATTRIBUTE_UNUSED int
+AvoidMessageBoxHook(int ReportType, char *Message, int *Return) {
   // Set *Return to the retry code for the return value of _CrtDbgReport:
   // http://msdn.microsoft.com/en-us/library/8hyw4sy7(v=vs.71).aspx
   // This may also trigger just-in-time debugging via DebugBreak().
@@ -196,6 +284,22 @@ static int AvoidMessageBoxHook(int ReportType, char *Message, int *Return) {
 
 #endif
 
+extern "C" void HandleAbort(int Sig) {
+  if (Sig == SIGABRT) {
+    LLVM_BUILTIN_TRAP;
+  }
+}
+
+static void InitializeThreading() {
+  if (CriticalSectionInitialized)
+    return;
+
+  // Now's the time to create the critical section. This is the first time
+  // through here, and there's only one thread.
+  InitializeCriticalSection(&CriticalSection);
+  CriticalSectionInitialized = true;
+}
+
 static void RegisterHandler() {
 #if __MINGW32__ && !defined(__MINGW64_VERSION_MAJOR)
   // On MinGW.org, we need to load up the symbols explicitly, because the
@@ -214,9 +318,7 @@ static void RegisterHandler() {
     return;
   }
 
-  // Now's the time to create the critical section.  This is the first time
-  // through here, and there's only one thread.
-  InitializeCriticalSection(&CriticalSection);
+  InitializeThreading();
 
   // Enter it immediately.  Now if someone hits CTRL/C, the console handler
   // can't proceed until the globals are updated.
@@ -226,17 +328,6 @@ static void RegisterHandler() {
   OldFilter = SetUnhandledExceptionFilter(LLVMUnhandledExceptionFilter);
   SetConsoleCtrlHandler(LLVMConsoleCtrlHandler, TRUE);
 
-  // Environment variable to disable any kind of crash dialog.
-  if (getenv("LLVM_DISABLE_CRASH_REPORT")) {
-#ifdef _MSC_VER
-    _CrtSetReportHook(AvoidMessageBoxHook);
-#endif
-    SetErrorMode(SEM_FAILCRITICALERRORS |
-                 SEM_NOGPFAULTERRORBOX |
-                 SEM_NOOPENFILEERRORBOX);
-    ExitOnUnhandledExceptions = true;
-  }
-
   // IMPORTANT NOTE: Caller must call LeaveCriticalSection(&CriticalSection) or
   // else multi-threading problems will ensue.
 }
@@ -267,7 +358,6 @@ void sys::DontRemoveFileOnSignal(StringRef Filename) {
 
   RegisterHandler();
 
-  FilesToRemove->push_back(Filename);
   std::vector<std::string>::reverse_iterator I =
   std::find(FilesToRemove->rbegin(), FilesToRemove->rend(), Filename);
   if (I != FilesToRemove->rend())
@@ -276,19 +366,63 @@ void sys::DontRemoveFileOnSignal(StringRef Filename) {
   LeaveCriticalSection(&CriticalSection);
 }
 
+void sys::DisableSystemDialogsOnCrash() {
+  // Crash to stack trace handler on abort.
+  signal(SIGABRT, HandleAbort);
+
+  // The following functions are not reliably accessible on MinGW.
+#ifdef _MSC_VER
+  // We're already handling writing a "something went wrong" message.
+  _set_abort_behavior(0, _WRITE_ABORT_MSG);
+  // Disable Dr. Watson.
+  _set_abort_behavior(0, _CALL_REPORTFAULT);
+  _CrtSetReportHook(AvoidMessageBoxHook);
+#endif
+
+  // Disable standard error dialog box.
+  SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX |
+               SEM_NOOPENFILEERRORBOX);
+  _set_error_mode(_OUT_TO_STDERR);
+}
+
 /// PrintStackTraceOnErrorSignal - When an error signal (such as SIBABRT or
 /// SIGSEGV) is delivered to the process, print a stack trace and then exit.
-void sys::PrintStackTraceOnErrorSignal() {
+void sys::PrintStackTraceOnErrorSignal(bool DisableCrashReporting) {
+  DisableSystemDialogsOnCrash();
   RegisterHandler();
   LeaveCriticalSection(&CriticalSection);
 }
+}
+
+#if defined(__MINGW32__) && !defined(__MINGW64_VERSION_MAJOR)
+// Provide a prototype for RtlCaptureContext, mingw32 from mingw.org is
+// missing it but mingw-w64 has it.
+extern "C" VOID WINAPI RtlCaptureContext(PCONTEXT ContextRecord);
+#endif
 
-void llvm::sys::PrintStackTrace(FILE *) {
-  // FIXME: Implement.
+void llvm::sys::PrintStackTrace(raw_ostream &OS) {
+
+  STACKFRAME64 StackFrame = {};
+  CONTEXT Context = {};
+  ::RtlCaptureContext(&Context);
+#if defined(_M_X64)
+  StackFrame.AddrPC.Offset = Context.Rip;
+  StackFrame.AddrStack.Offset = Context.Rsp;
+  StackFrame.AddrFrame.Offset = Context.Rbp;
+#else
+  StackFrame.AddrPC.Offset = Context.Eip;
+  StackFrame.AddrStack.Offset = Context.Esp;
+  StackFrame.AddrFrame.Offset = Context.Ebp;
+#endif
+  StackFrame.AddrPC.Mode = AddrModeFlat;
+  StackFrame.AddrStack.Mode = AddrModeFlat;
+  StackFrame.AddrFrame.Mode = AddrModeFlat;
+  PrintStackTraceForThread(OS, GetCurrentProcess(), GetCurrentThread(),
+                           StackFrame, &Context);
 }
 
 
-void sys::SetInterruptFunction(void (*IF)()) {
+void llvm::sys::SetInterruptFunction(void (*IF)()) {
   RegisterHandler();
   InterruptFunction = IF;
   LeaveCriticalSection(&CriticalSection);
@@ -298,16 +432,18 @@ void sys::SetInterruptFunction(void (*IF)()) {
 /// AddSignalHandler - Add a function to be called when a signal is delivered
 /// to the process.  The handler can have a cookie passed to it to identify
 /// what instance of the handler it is.
-void sys::AddSignalHandler(void (*FnPtr)(void *), void *Cookie) {
+void llvm::sys::AddSignalHandler(void (*FnPtr)(void *), void *Cookie) {
   if (CallBacksToRun == 0)
     CallBacksToRun = new std::vector<std::pair<void(*)(void*), void*> >();
   CallBacksToRun->push_back(std::make_pair(FnPtr, Cookie));
   RegisterHandler();
   LeaveCriticalSection(&CriticalSection);
 }
-}
 
 static void Cleanup() {
+  if (CleanupExecuted)
+    return;
+
   EnterCriticalSection(&CriticalSection);
 
   // Prevent other thread from registering new files and directories for
@@ -323,13 +459,18 @@ static void Cleanup() {
     }
 
   if (CallBacksToRun)
-    for (unsigned i = 0, e = CallBacksToRun->size(); i != e; ++i)
-      (*CallBacksToRun)[i].first((*CallBacksToRun)[i].second);
+    for (auto &I : *CallBacksToRun)
+      I.first(I.second);
 
   LeaveCriticalSection(&CriticalSection);
 }
 
 void llvm::sys::RunInterruptHandlers() {
+  // The interrupt handler may be called from an interrupt, but it may also be
+  // called manually (such as the case of report_fatal_error with no registered
+  // error handler). We must ensure that the critical section is properly
+  // initialized.
+  InitializeThreading();
   Cleanup();
 }
 
@@ -337,12 +478,9 @@ static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep) {
   Cleanup();
 
   // Initialize the STACKFRAME structure.
-  STACKFRAME64 StackFrame;
-  memset(&StackFrame, 0, sizeof(StackFrame));
+  STACKFRAME64 StackFrame = {};
 
-  DWORD machineType;
 #if defined(_M_X64)
-  machineType = IMAGE_FILE_MACHINE_AMD64;
   StackFrame.AddrPC.Offset = ep->ContextRecord->Rip;
   StackFrame.AddrPC.Mode = AddrModeFlat;
   StackFrame.AddrStack.Offset = ep->ContextRecord->Rsp;
@@ -350,7 +488,6 @@ static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep) {
   StackFrame.AddrFrame.Offset = ep->ContextRecord->Rbp;
   StackFrame.AddrFrame.Mode = AddrModeFlat;
 #elif defined(_M_IX86)
-  machineType = IMAGE_FILE_MACHINE_I386;
   StackFrame.AddrPC.Offset = ep->ContextRecord->Eip;
   StackFrame.AddrPC.Mode = AddrModeFlat;
   StackFrame.AddrStack.Offset = ep->ContextRecord->Esp;
@@ -361,90 +498,10 @@ static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep) {
 
   HANDLE hProcess = GetCurrentProcess();
   HANDLE hThread = GetCurrentThread();
+  PrintStackTraceForThread(llvm::errs(), hProcess, hThread, StackFrame,
+                           ep->ContextRecord);
 
-  // Initialize the symbol handler.
-  SymSetOptions(SYMOPT_DEFERRED_LOADS|SYMOPT_LOAD_LINES);
-  SymInitialize(hProcess, NULL, TRUE);
-
-  while (true) {
-    if (!StackWalk64(machineType, hProcess, hThread, &StackFrame,
-                   ep->ContextRecord, NULL, SymFunctionTableAccess64,
-                   SymGetModuleBase64, NULL)) {
-      break;
-    }
-
-    if (StackFrame.AddrFrame.Offset == 0)
-      break;
-
-    // Print the PC in hexadecimal.
-    DWORD64 PC = StackFrame.AddrPC.Offset;
-#if defined(_M_X64)
-    fprintf(stderr, "0x%016llX", PC);
-#elif defined(_M_IX86)
-    fprintf(stderr, "0x%08lX", static_cast<DWORD>(PC));
-#endif
-
-    // Print the parameters.  Assume there are four.
-#if defined(_M_X64)
-    fprintf(stderr, " (0x%016llX 0x%016llX 0x%016llX 0x%016llX)",
-                StackFrame.Params[0],
-                StackFrame.Params[1],
-                StackFrame.Params[2],
-                StackFrame.Params[3]);
-#elif defined(_M_IX86)
-    fprintf(stderr, " (0x%08lX 0x%08lX 0x%08lX 0x%08lX)",
-                static_cast<DWORD>(StackFrame.Params[0]),
-                static_cast<DWORD>(StackFrame.Params[1]),
-                static_cast<DWORD>(StackFrame.Params[2]),
-                static_cast<DWORD>(StackFrame.Params[3]));
-#endif
-    // Verify the PC belongs to a module in this process.
-    if (!SymGetModuleBase64(hProcess, PC)) {
-      fputs(" <unknown module>\n", stderr);
-      continue;
-    }
-
-    // Print the symbol name.
-    char buffer[512];
-    IMAGEHLP_SYMBOL64 *symbol = reinterpret_cast<IMAGEHLP_SYMBOL64 *>(buffer);
-    memset(symbol, 0, sizeof(IMAGEHLP_SYMBOL64));
-    symbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
-    symbol->MaxNameLength = 512 - sizeof(IMAGEHLP_SYMBOL64);
-
-    DWORD64 dwDisp;
-    if (!SymGetSymFromAddr64(hProcess, PC, &dwDisp, symbol)) {
-      fputc('\n', stderr);
-      continue;
-    }
-
-    buffer[511] = 0;
-    if (dwDisp > 0)
-      fprintf(stderr, ", %s() + 0x%llX bytes(s)", symbol->Name, dwDisp);
-    else
-      fprintf(stderr, ", %s", symbol->Name);
-
-    // Print the source file and line number information.
-    IMAGEHLP_LINE64 line;
-    DWORD dwLineDisp;
-    memset(&line, 0, sizeof(line));
-    line.SizeOfStruct = sizeof(line);
-    if (SymGetLineFromAddr64(hProcess, PC, &dwLineDisp, &line)) {
-      fprintf(stderr, ", %s, line %lu", line.FileName, line.LineNumber);
-      if (dwLineDisp > 0)
-        fprintf(stderr, " + 0x%lX byte(s)", dwLineDisp);
-    }
-
-    fputc('\n', stderr);
-  }
-
-  if (ExitOnUnhandledExceptions)
-    _exit(ep->ExceptionRecord->ExceptionCode);
-
-  // Allow dialog box to pop up allowing choice to start debugger.
-  if (OldFilter)
-    return (*OldFilter)(ep);
-  else
-    return EXCEPTION_CONTINUE_SEARCH;
+  _exit(ep->ExceptionRecord->ExceptionCode);
 }
 
 static BOOL WINAPI LLVMConsoleCtrlHandler(DWORD dwCtrlType) {
diff --git a/contrib/llvm/lib/Support/Windows/TimeValue.inc b/contrib/llvm/lib/Support/Windows/TimeValue.inc
index 0223ab4..b90b4f1 100644
--- a/contrib/llvm/lib/Support/Windows/TimeValue.inc
+++ b/contrib/llvm/lib/Support/Windows/TimeValue.inc
@@ -47,6 +47,7 @@ std::string TimeValue::str() const {
   __time64_t OurTime = this->toEpochTime();
   int Error = ::_localtime64_s(&Storage, &OurTime);
   assert(!Error);
+  (void)Error;
   LT = &Storage;
 #endif
 
diff --git a/contrib/llvm/lib/Support/Windows/WindowsSupport.h b/contrib/llvm/lib/Support/Windows/WindowsSupport.h
index 1d1cedc..5bb0b8d 100644
--- a/contrib/llvm/lib/Support/Windows/WindowsSupport.h
+++ b/contrib/llvm/lib/Support/Windows/WindowsSupport.h
@@ -19,6 +19,9 @@
 //===          is guaranteed to work on *all* Win32 variants.
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_SUPPORT_WINDOWSSUPPORT_H
+#define LLVM_SUPPORT_WINDOWSSUPPORT_H
+
 // mingw-w64 tends to define it as 0x0502 in its headers.
 #undef _WIN32_WINNT
 #undef _WIN32_IE
@@ -89,7 +92,7 @@ public:
   }
 
   // True if Handle is valid.
-  LLVM_EXPLICIT operator bool() const {
+  explicit operator bool() const {
     return HandleTraits::IsValid(Handle) ? true : false;
   }
 
@@ -178,3 +181,5 @@ std::error_code UTF16ToCurCP(const wchar_t *utf16, size_t utf16_len,
 } // end namespace windows
 } // end namespace sys
 } // end namespace llvm.
+
+#endif