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+//===- Win32/Signals.cpp - Win32 Signals 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 provides the Win32 specific implementation of the Signals class.
+//
+//===----------------------------------------------------------------------===//
+#include "llvm/Support/FileSystem.h"
+#include <algorithm>
+#include <signal.h>
+#include <stdio.h>
+
+#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"
+
+#ifdef __MINGW32__
+ #include <imagehlp.h>
+#else
+ #include <dbghelp.h>
+#endif
+#include <psapi.h>
+
+#ifdef _MSC_VER
+ #pragma comment(lib, "psapi.lib")
+#elif __MINGW32__
+ #if (HAVE_LIBPSAPI != 1)
+ #error "libpsapi.a should be present"
+ #endif
+ // The version of g++ that comes with MinGW does *not* properly understand
+ // the ll format specifier for printf. However, MinGW passes the format
+ // specifiers on to the MSVCRT entirely, and the CRT understands the ll
+ // specifier. So these warnings are spurious in this case. Since we compile
+ // with -Wall, this will generate these warnings which should be ignored. So
+ // we will turn off the warnings for this just file. However, MinGW also does
+ // not support push and pop for diagnostics, so we have to manually turn it
+ // back on at the end of the file.
+ #pragma GCC diagnostic ignored "-Wformat"
+ #pragma GCC diagnostic ignored "-Wformat-extra-args"
+
+ #if !defined(__MINGW64_VERSION_MAJOR)
+ // MinGW.org does not have updated support for the 64-bit versions of the
+ // DebugHlp APIs. So we will have to load them manually. The structures and
+ // method signatures were pulled from DbgHelp.h in the Windows Platform SDK,
+ // and adjusted for brevity.
+ typedef struct _IMAGEHLP_LINE64 {
+ DWORD SizeOfStruct;
+ PVOID Key;
+ DWORD LineNumber;
+ PCHAR FileName;
+ DWORD64 Address;
+ } IMAGEHLP_LINE64, *PIMAGEHLP_LINE64;
+
+ typedef struct _IMAGEHLP_SYMBOL64 {
+ DWORD SizeOfStruct;
+ DWORD64 Address;
+ DWORD Size;
+ DWORD Flags;
+ DWORD MaxNameLength;
+ CHAR Name[1];
+ } IMAGEHLP_SYMBOL64, *PIMAGEHLP_SYMBOL64;
+
+ typedef struct _tagADDRESS64 {
+ DWORD64 Offset;
+ WORD Segment;
+ ADDRESS_MODE Mode;
+ } ADDRESS64, *LPADDRESS64;
+
+ typedef struct _KDHELP64 {
+ DWORD64 Thread;
+ DWORD ThCallbackStack;
+ DWORD ThCallbackBStore;
+ DWORD NextCallback;
+ DWORD FramePointer;
+ DWORD64 KiCallUserMode;
+ DWORD64 KeUserCallbackDispatcher;
+ DWORD64 SystemRangeStart;
+ DWORD64 KiUserExceptionDispatcher;
+ DWORD64 StackBase;
+ DWORD64 StackLimit;
+ DWORD64 Reserved[5];
+ } KDHELP64, *PKDHELP64;
+
+ typedef struct _tagSTACKFRAME64 {
+ ADDRESS64 AddrPC;
+ ADDRESS64 AddrReturn;
+ ADDRESS64 AddrFrame;
+ ADDRESS64 AddrStack;
+ ADDRESS64 AddrBStore;
+ PVOID FuncTableEntry;
+ DWORD64 Params[4];
+ BOOL Far;
+ BOOL Virtual;
+ DWORD64 Reserved[3];
+ KDHELP64 KdHelp;
+ } STACKFRAME64, *LPSTACKFRAME64;
+ #endif // !defined(__MINGW64_VERSION_MAJOR)
+#endif // __MINGW32__
+
+typedef BOOL (__stdcall *PREAD_PROCESS_MEMORY_ROUTINE64)(HANDLE hProcess,
+ DWORD64 qwBaseAddress, PVOID lpBuffer, DWORD nSize,
+ LPDWORD lpNumberOfBytesRead);
+
+typedef PVOID (__stdcall *PFUNCTION_TABLE_ACCESS_ROUTINE64)( HANDLE ahProcess,
+ DWORD64 AddrBase);
+
+typedef DWORD64 (__stdcall *PGET_MODULE_BASE_ROUTINE64)(HANDLE hProcess,
+ DWORD64 Address);
+
+typedef DWORD64 (__stdcall *PTRANSLATE_ADDRESS_ROUTINE64)(HANDLE hProcess,
+ HANDLE hThread, LPADDRESS64 lpaddr);
+
+typedef BOOL (WINAPI *fpStackWalk64)(DWORD, HANDLE, HANDLE, LPSTACKFRAME64,
+ PVOID, PREAD_PROCESS_MEMORY_ROUTINE64,
+ PFUNCTION_TABLE_ACCESS_ROUTINE64,
+ PGET_MODULE_BASE_ROUTINE64,
+ PTRANSLATE_ADDRESS_ROUTINE64);
+static fpStackWalk64 fStackWalk64;
+
+typedef DWORD64 (WINAPI *fpSymGetModuleBase64)(HANDLE, DWORD64);
+static fpSymGetModuleBase64 fSymGetModuleBase64;
+
+typedef BOOL (WINAPI *fpSymGetSymFromAddr64)(HANDLE, DWORD64,
+ PDWORD64, PIMAGEHLP_SYMBOL64);
+static fpSymGetSymFromAddr64 fSymGetSymFromAddr64;
+
+typedef BOOL (WINAPI *fpSymGetLineFromAddr64)(HANDLE, DWORD64,
+ PDWORD, PIMAGEHLP_LINE64);
+static fpSymGetLineFromAddr64 fSymGetLineFromAddr64;
+
+typedef BOOL(WINAPI *fpSymGetModuleInfo64)(HANDLE hProcess, DWORD64 dwAddr,
+ PIMAGEHLP_MODULE64 ModuleInfo);
+static fpSymGetModuleInfo64 fSymGetModuleInfo64;
+
+typedef PVOID (WINAPI *fpSymFunctionTableAccess64)(HANDLE, DWORD64);
+static fpSymFunctionTableAccess64 fSymFunctionTableAccess64;
+
+typedef DWORD (WINAPI *fpSymSetOptions)(DWORD);
+static fpSymSetOptions fSymSetOptions;
+
+typedef BOOL (WINAPI *fpSymInitialize)(HANDLE, PCSTR, BOOL);
+static fpSymInitialize fSymInitialize;
+
+typedef BOOL (WINAPI *fpEnumerateLoadedModules)(HANDLE,PENUMLOADED_MODULES_CALLBACK64,PVOID);
+static fpEnumerateLoadedModules fEnumerateLoadedModules;
+
+static bool load64BitDebugHelp(void) {
+ HMODULE hLib = ::LoadLibraryW(L"Dbghelp.dll");
+ if (hLib) {
+ fStackWalk64 = (fpStackWalk64)
+ ::GetProcAddress(hLib, "StackWalk64");
+ fSymGetModuleBase64 = (fpSymGetModuleBase64)
+ ::GetProcAddress(hLib, "SymGetModuleBase64");
+ fSymGetSymFromAddr64 = (fpSymGetSymFromAddr64)
+ ::GetProcAddress(hLib, "SymGetSymFromAddr64");
+ fSymGetLineFromAddr64 = (fpSymGetLineFromAddr64)
+ ::GetProcAddress(hLib, "SymGetLineFromAddr64");
+ fSymGetModuleInfo64 = (fpSymGetModuleInfo64)
+ ::GetProcAddress(hLib, "SymGetModuleInfo64");
+ fSymFunctionTableAccess64 = (fpSymFunctionTableAccess64)
+ ::GetProcAddress(hLib, "SymFunctionTableAccess64");
+ fSymSetOptions = (fpSymSetOptions)::GetProcAddress(hLib, "SymSetOptions");
+ fSymInitialize = (fpSymInitialize)::GetProcAddress(hLib, "SymInitialize");
+ fEnumerateLoadedModules = (fpEnumerateLoadedModules)
+ ::GetProcAddress(hLib, "EnumerateLoadedModules64");
+ }
+ return fStackWalk64 && fSymInitialize && fSymSetOptions;
+}
+
+using namespace llvm;
+
+// Forward declare.
+static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep);
+static BOOL WINAPI LLVMConsoleCtrlHandler(DWORD dwCtrlType);
+
+// InterruptFunction - The function to call if ctrl-c is pressed.
+static void (*InterruptFunction)() = 0;
+
+static std::vector<std::string> *FilesToRemove = NULL;
+static bool RegisteredUnhandledExceptionFilter = false;
+static bool CleanupExecuted = 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;
+
+enum {
+#if defined(_M_X64)
+ NativeMachineType = IMAGE_FILE_MACHINE_AMD64
+#else
+ NativeMachineType = IMAGE_FILE_MACHINE_I386
+#endif
+};
+
+static bool printStackTraceWithLLVMSymbolizer(llvm::raw_ostream &OS,
+ HANDLE hProcess, HANDLE hThread,
+ STACKFRAME64 &StackFrameOrig,
+ CONTEXT *ContextOrig) {
+ // StackWalk64 modifies the incoming stack frame and context, so copy them.
+ STACKFRAME64 StackFrame = StackFrameOrig;
+
+ // Copy the register context so that we don't modify it while we unwind. We
+ // could use InitializeContext + CopyContext, but that's only required to get
+ // at AVX registers, which typically aren't needed by StackWalk64. Reduce the
+ // flag set to indicate that there's less data.
+ CONTEXT Context = *ContextOrig;
+ Context.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
+
+ static void *StackTrace[256];
+ size_t Depth = 0;
+ while (fStackWalk64(NativeMachineType, hProcess, hThread, &StackFrame,
+ &Context, 0, fSymFunctionTableAccess64,
+ fSymGetModuleBase64, 0)) {
+ if (StackFrame.AddrFrame.Offset == 0)
+ break;
+ StackTrace[Depth++] = (void *)(uintptr_t)StackFrame.AddrPC.Offset;
+ if (Depth >= array_lengthof(StackTrace))
+ break;
+ }
+
+ return printSymbolizedStackTrace(&StackTrace[0], Depth, OS);
+}
+
+namespace {
+struct FindModuleData {
+ void **StackTrace;
+ int Depth;
+ const char **Modules;
+ intptr_t *Offsets;
+ StringSaver *StrPool;
+};
+}
+
+static BOOL CALLBACK findModuleCallback(WIN32_ELMCB_PCSTR ModuleName,
+ DWORD64 ModuleBase, ULONG ModuleSize,
+ void *VoidData) {
+ FindModuleData *Data = (FindModuleData*)VoidData;
+ intptr_t Beg = ModuleBase;
+ intptr_t End = Beg + ModuleSize;
+ for (int I = 0; I < Data->Depth; I++) {
+ if (Data->Modules[I])
+ continue;
+ intptr_t Addr = (intptr_t)Data->StackTrace[I];
+ if (Beg <= Addr && Addr < End) {
+ Data->Modules[I] = Data->StrPool->save(ModuleName);
+ Data->Offsets[I] = Addr - Beg;
+ }
+ }
+ return TRUE;
+}
+
+static bool findModulesAndOffsets(void **StackTrace, int Depth,
+ const char **Modules, intptr_t *Offsets,
+ const char *MainExecutableName,
+ StringSaver &StrPool) {
+ if (!fEnumerateLoadedModules)
+ return false;
+ FindModuleData Data;
+ Data.StackTrace = StackTrace;
+ Data.Depth = Depth;
+ Data.Modules = Modules;
+ Data.Offsets = Offsets;
+ Data.StrPool = &StrPool;
+ fEnumerateLoadedModules(GetCurrentProcess(), findModuleCallback, &Data);
+ return true;
+}
+
+static void PrintStackTraceForThread(llvm::raw_ostream &OS, HANDLE hProcess,
+ HANDLE hThread, STACKFRAME64 &StackFrame,
+ CONTEXT *Context) {
+ // Initialize the symbol handler.
+ fSymSetOptions(SYMOPT_DEFERRED_LOADS | SYMOPT_LOAD_LINES);
+ fSymInitialize(hProcess, NULL, TRUE);
+
+ // Try llvm-symbolizer first. llvm-symbolizer knows how to deal with both PDBs
+ // and DWARF, so it should do a good job regardless of what debug info or
+ // linker is in use.
+ if (printStackTraceWithLLVMSymbolizer(OS, hProcess, hThread, StackFrame,
+ Context)) {
+ return;
+ }
+
+ while (true) {
+ if (!fStackWalk64(NativeMachineType, hProcess, hThread, &StackFrame,
+ Context, 0, fSymFunctionTableAccess64,
+ fSymGetModuleBase64, 0)) {
+ 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 (!fSymGetModuleBase64(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 (!fSymGetSymFromAddr64(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 (fSymGetLineFromAddr64(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 {
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only Win32 specific code
+//=== and must not be UNIX code
+//===----------------------------------------------------------------------===//
+
+#ifdef _MSC_VER
+/// AvoidMessageBoxHook - Emulates hitting "retry" from an "abort, retry,
+/// ignore" CRT debug report dialog. "retry" raises an exception which
+/// ultimately triggers our stack dumper.
+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().
+ if (Return)
+ *Return = 1;
+ // Don't call _CrtDbgReport.
+ return TRUE;
+}
+
+#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 we cannot load up the APIs (which would be unexpected as they should
+ // exist on every version of Windows we support), we will bail out since
+ // there would be nothing to report.
+ if (!load64BitDebugHelp()) {
+ assert(false && "These APIs should always be available");
+ return;
+ }
+
+ if (RegisteredUnhandledExceptionFilter) {
+ EnterCriticalSection(&CriticalSection);
+ return;
+ }
+
+ InitializeThreading();
+
+ // Enter it immediately. Now if someone hits CTRL/C, the console handler
+ // can't proceed until the globals are updated.
+ EnterCriticalSection(&CriticalSection);
+
+ RegisteredUnhandledExceptionFilter = true;
+ OldFilter = SetUnhandledExceptionFilter(LLVMUnhandledExceptionFilter);
+ SetConsoleCtrlHandler(LLVMConsoleCtrlHandler, TRUE);
+
+ // IMPORTANT NOTE: Caller must call LeaveCriticalSection(&CriticalSection) or
+ // else multi-threading problems will ensue.
+}
+
+// RemoveFileOnSignal - The public API
+bool sys::RemoveFileOnSignal(StringRef Filename, std::string* ErrMsg) {
+ RegisterHandler();
+
+ if (CleanupExecuted) {
+ if (ErrMsg)
+ *ErrMsg = "Process terminating -- cannot register for removal";
+ return true;
+ }
+
+ if (FilesToRemove == NULL)
+ FilesToRemove = new std::vector<std::string>;
+
+ FilesToRemove->push_back(Filename);
+
+ LeaveCriticalSection(&CriticalSection);
+ return false;
+}
+
+// DontRemoveFileOnSignal - The public API
+void sys::DontRemoveFileOnSignal(StringRef Filename) {
+ if (FilesToRemove == NULL)
+ return;
+
+ RegisterHandler();
+
+ std::vector<std::string>::reverse_iterator I =
+ std::find(FilesToRemove->rbegin(), FilesToRemove->rend(), Filename);
+ if (I != FilesToRemove->rend())
+ FilesToRemove->erase(I.base()-1);
+
+ 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(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(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 llvm::sys::SetInterruptFunction(void (*IF)()) {
+ RegisterHandler();
+ InterruptFunction = IF;
+ LeaveCriticalSection(&CriticalSection);
+}
+
+
+/// 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 llvm::sys::AddSignalHandler(void (*FnPtr)(void *), void *Cookie) {
+ 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
+ // removal, should we be executing because of the console handler callback.
+ CleanupExecuted = true;
+
+ // FIXME: open files cannot be deleted.
+ if (FilesToRemove != NULL)
+ while (!FilesToRemove->empty()) {
+ llvm::sys::fs::remove(FilesToRemove->back());
+ FilesToRemove->pop_back();
+ }
+ llvm::sys::RunSignalHandlers();
+ 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();
+}
+
+static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep) {
+ Cleanup();
+
+ // Initialize the STACKFRAME structure.
+ STACKFRAME64 StackFrame = {};
+
+#if defined(_M_X64)
+ StackFrame.AddrPC.Offset = ep->ContextRecord->Rip;
+ StackFrame.AddrPC.Mode = AddrModeFlat;
+ StackFrame.AddrStack.Offset = ep->ContextRecord->Rsp;
+ StackFrame.AddrStack.Mode = AddrModeFlat;
+ StackFrame.AddrFrame.Offset = ep->ContextRecord->Rbp;
+ StackFrame.AddrFrame.Mode = AddrModeFlat;
+#elif defined(_M_IX86)
+ StackFrame.AddrPC.Offset = ep->ContextRecord->Eip;
+ StackFrame.AddrPC.Mode = AddrModeFlat;
+ StackFrame.AddrStack.Offset = ep->ContextRecord->Esp;
+ StackFrame.AddrStack.Mode = AddrModeFlat;
+ StackFrame.AddrFrame.Offset = ep->ContextRecord->Ebp;
+ StackFrame.AddrFrame.Mode = AddrModeFlat;
+#endif
+
+ HANDLE hProcess = GetCurrentProcess();
+ HANDLE hThread = GetCurrentThread();
+ PrintStackTraceForThread(llvm::errs(), hProcess, hThread, StackFrame,
+ ep->ContextRecord);
+
+ _exit(ep->ExceptionRecord->ExceptionCode);
+}
+
+static BOOL WINAPI LLVMConsoleCtrlHandler(DWORD dwCtrlType) {
+ // We are running in our very own thread, courtesy of Windows.
+ EnterCriticalSection(&CriticalSection);
+ Cleanup();
+
+ // If an interrupt function has been set, go and run one it; otherwise,
+ // the process dies.
+ void (*IF)() = InterruptFunction;
+ InterruptFunction = 0; // Don't run it on another CTRL-C.
+
+ if (IF) {
+ // Note: if the interrupt function throws an exception, there is nothing
+ // to catch it in this thread so it will kill the process.
+ IF(); // Run it now.
+ LeaveCriticalSection(&CriticalSection);
+ return TRUE; // Don't kill the process.
+ }
+
+ // Allow normal processing to take place; i.e., the process dies.
+ LeaveCriticalSection(&CriticalSection);
+ return FALSE;
+}
+
+#if __MINGW32__
+ // We turned these warnings off for this file so that MinGW-g++ doesn't
+ // complain about the ll format specifiers used. Now we are turning the
+ // warnings back on. If MinGW starts to support diagnostic stacks, we can
+ // replace this with a pop.
+ #pragma GCC diagnostic warning "-Wformat"
+ #pragma GCC diagnostic warning "-Wformat-extra-args"
+#endif
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