-//===- lib/Support/ErrorHandling.cpp - Callbacks for errors -----*- C++ -*-===//
+//===- lib/Support/ErrorHandling.cpp - Callbacks for errors ---------------===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
//
-// This file defines an API for error handling, it supersedes cerr+abort(), and
-// cerr+exit() style error handling.
-// Callbacks can be registered for these errors through this API.
+// This file defines an API used to indicate fatal error conditions. Non-fatal
+// errors (most of them) should be handled through LLVMContext.
+//
//===----------------------------------------------------------------------===//
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm-c/Core.h"
+#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Twine.h"
+#include "llvm/Config/config.h"
#include "llvm/Support/Debug.h"
-#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Errc.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Mutex.h"
+#include "llvm/Support/MutexGuard.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/Threading.h"
+#include "llvm/Support/WindowsError.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/System/Threading.h"
#include <cassert>
#include <cstdlib>
+#if defined(HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+#if defined(_MSC_VER)
+# include <io.h>
+# include <fcntl.h>
+#endif
+
using namespace llvm;
-using namespace std;
-static llvm_error_handler_t ErrorHandler = 0;
-static void *ErrorHandlerUserData = 0;
+static fatal_error_handler_t ErrorHandler = nullptr;
+static void *ErrorHandlerUserData = nullptr;
+
+static ManagedStatic<sys::Mutex> ErrorHandlerMutex;
-namespace llvm {
-void llvm_install_error_handler(llvm_error_handler_t handler,
- void *user_data) {
- assert(!llvm_is_multithreaded() &&
- "Cannot register error handlers after starting multithreaded mode!\n");
+void llvm::install_fatal_error_handler(fatal_error_handler_t handler,
+ void *user_data) {
+ llvm::MutexGuard Lock(*ErrorHandlerMutex);
assert(!ErrorHandler && "Error handler already registered!\n");
ErrorHandler = handler;
ErrorHandlerUserData = user_data;
}
-void llvm_remove_error_handler() {
- ErrorHandler = 0;
+void llvm::remove_fatal_error_handler() {
+ llvm::MutexGuard Lock(*ErrorHandlerMutex);
+ ErrorHandler = nullptr;
+ ErrorHandlerUserData = nullptr;
+}
+
+void llvm::report_fatal_error(const char *Reason, bool GenCrashDiag) {
+ report_fatal_error(Twine(Reason), GenCrashDiag);
}
-void report_fatal_error(const char *reason) {
- report_fatal_error(Twine(reason));
+void llvm::report_fatal_error(const std::string &Reason, bool GenCrashDiag) {
+ report_fatal_error(Twine(Reason), GenCrashDiag);
}
-void report_fatal_error(const std::string &reason) {
- report_fatal_error(Twine(reason));
+void llvm::report_fatal_error(StringRef Reason, bool GenCrashDiag) {
+ report_fatal_error(Twine(Reason), GenCrashDiag);
}
-void report_fatal_error(const Twine &reason) {
- if (!ErrorHandler) {
- errs() << "LLVM ERROR: " << reason << "\n";
+void llvm::report_fatal_error(const Twine &Reason, bool GenCrashDiag) {
+ llvm::fatal_error_handler_t handler = nullptr;
+ void* handlerData = nullptr;
+ {
+ // Only acquire the mutex while reading the handler, so as not to invoke a
+ // user-supplied callback under a lock.
+ llvm::MutexGuard Lock(*ErrorHandlerMutex);
+ handler = ErrorHandler;
+ handlerData = ErrorHandlerUserData;
+ }
+
+ if (handler) {
+ handler(handlerData, Reason.str(), GenCrashDiag);
} else {
- ErrorHandler(ErrorHandlerUserData, reason.str());
+ // Blast the result out to stderr. We don't try hard to make sure this
+ // succeeds (e.g. handling EINTR) and we can't use errs() here because
+ // raw ostreams can call report_fatal_error.
+ SmallVector<char, 64> Buffer;
+ raw_svector_ostream OS(Buffer);
+ OS << "LLVM ERROR: " << Reason << "\n";
+ StringRef MessageStr = OS.str();
+ ssize_t written = ::write(2, MessageStr.data(), MessageStr.size());
+ (void)written; // If something went wrong, we deliberately just give up.
}
+
+ // If we reached here, we are failing ungracefully. Run the interrupt handlers
+ // to make sure any special cleanups get done, in particular that we remove
+ // files registered with RemoveFileOnSignal.
+ sys::RunInterruptHandlers();
+
exit(1);
}
-void llvm_unreachable_internal(const char *msg, const char *file,
- unsigned line) {
+void llvm::llvm_unreachable_internal(const char *msg, const char *file,
+ unsigned line) {
// This code intentionally doesn't call the ErrorHandler callback, because
// llvm_unreachable is intended to be used to indicate "impossible"
// situations, and not legitimate runtime errors.
dbgs() << " at " << file << ":" << line;
dbgs() << "!\n";
abort();
+#ifdef LLVM_BUILTIN_UNREACHABLE
+ // Windows systems and possibly others don't declare abort() to be noreturn,
+ // so use the unreachable builtin to avoid a Clang self-host warning.
+ LLVM_BUILTIN_UNREACHABLE;
+#endif
}
+
+static void bindingsErrorHandler(void *user_data, const std::string& reason,
+ bool gen_crash_diag) {
+ LLVMFatalErrorHandler handler =
+ LLVM_EXTENSION reinterpret_cast<LLVMFatalErrorHandler>(user_data);
+ handler(reason.c_str());
}
+
+void LLVMInstallFatalErrorHandler(LLVMFatalErrorHandler Handler) {
+ install_fatal_error_handler(bindingsErrorHandler,
+ LLVM_EXTENSION reinterpret_cast<void *>(Handler));
+}
+
+void LLVMResetFatalErrorHandler() {
+ remove_fatal_error_handler();
+}
+
+#ifdef LLVM_ON_WIN32
+
+#include <winerror.h>
+
+// I'd rather not double the line count of the following.
+#define MAP_ERR_TO_COND(x, y) \
+ case x: \
+ return make_error_code(errc::y)
+
+std::error_code llvm::mapWindowsError(unsigned EV) {
+ switch (EV) {
+ MAP_ERR_TO_COND(ERROR_ACCESS_DENIED, permission_denied);
+ MAP_ERR_TO_COND(ERROR_ALREADY_EXISTS, file_exists);
+ MAP_ERR_TO_COND(ERROR_BAD_UNIT, no_such_device);
+ MAP_ERR_TO_COND(ERROR_BUFFER_OVERFLOW, filename_too_long);
+ MAP_ERR_TO_COND(ERROR_BUSY, device_or_resource_busy);
+ MAP_ERR_TO_COND(ERROR_BUSY_DRIVE, device_or_resource_busy);
+ MAP_ERR_TO_COND(ERROR_CANNOT_MAKE, permission_denied);
+ MAP_ERR_TO_COND(ERROR_CANTOPEN, io_error);
+ MAP_ERR_TO_COND(ERROR_CANTREAD, io_error);
+ MAP_ERR_TO_COND(ERROR_CANTWRITE, io_error);
+ MAP_ERR_TO_COND(ERROR_CURRENT_DIRECTORY, permission_denied);
+ MAP_ERR_TO_COND(ERROR_DEV_NOT_EXIST, no_such_device);
+ MAP_ERR_TO_COND(ERROR_DEVICE_IN_USE, device_or_resource_busy);
+ MAP_ERR_TO_COND(ERROR_DIR_NOT_EMPTY, directory_not_empty);
+ MAP_ERR_TO_COND(ERROR_DIRECTORY, invalid_argument);
+ MAP_ERR_TO_COND(ERROR_DISK_FULL, no_space_on_device);
+ MAP_ERR_TO_COND(ERROR_FILE_EXISTS, file_exists);
+ MAP_ERR_TO_COND(ERROR_FILE_NOT_FOUND, no_such_file_or_directory);
+ MAP_ERR_TO_COND(ERROR_HANDLE_DISK_FULL, no_space_on_device);
+ MAP_ERR_TO_COND(ERROR_INVALID_ACCESS, permission_denied);
+ MAP_ERR_TO_COND(ERROR_INVALID_DRIVE, no_such_device);
+ MAP_ERR_TO_COND(ERROR_INVALID_FUNCTION, function_not_supported);
+ MAP_ERR_TO_COND(ERROR_INVALID_HANDLE, invalid_argument);
+ MAP_ERR_TO_COND(ERROR_INVALID_NAME, invalid_argument);
+ MAP_ERR_TO_COND(ERROR_LOCK_VIOLATION, no_lock_available);
+ MAP_ERR_TO_COND(ERROR_LOCKED, no_lock_available);
+ MAP_ERR_TO_COND(ERROR_NEGATIVE_SEEK, invalid_argument);
+ MAP_ERR_TO_COND(ERROR_NOACCESS, permission_denied);
+ MAP_ERR_TO_COND(ERROR_NOT_ENOUGH_MEMORY, not_enough_memory);
+ MAP_ERR_TO_COND(ERROR_NOT_READY, resource_unavailable_try_again);
+ MAP_ERR_TO_COND(ERROR_OPEN_FAILED, io_error);
+ MAP_ERR_TO_COND(ERROR_OPEN_FILES, device_or_resource_busy);
+ MAP_ERR_TO_COND(ERROR_OUTOFMEMORY, not_enough_memory);
+ MAP_ERR_TO_COND(ERROR_PATH_NOT_FOUND, no_such_file_or_directory);
+ MAP_ERR_TO_COND(ERROR_BAD_NETPATH, no_such_file_or_directory);
+ MAP_ERR_TO_COND(ERROR_READ_FAULT, io_error);
+ MAP_ERR_TO_COND(ERROR_RETRY, resource_unavailable_try_again);
+ MAP_ERR_TO_COND(ERROR_SEEK, io_error);
+ MAP_ERR_TO_COND(ERROR_SHARING_VIOLATION, permission_denied);
+ MAP_ERR_TO_COND(ERROR_TOO_MANY_OPEN_FILES, too_many_files_open);
+ MAP_ERR_TO_COND(ERROR_WRITE_FAULT, io_error);
+ MAP_ERR_TO_COND(ERROR_WRITE_PROTECT, permission_denied);
+ MAP_ERR_TO_COND(WSAEACCES, permission_denied);
+ MAP_ERR_TO_COND(WSAEBADF, bad_file_descriptor);
+ MAP_ERR_TO_COND(WSAEFAULT, bad_address);
+ MAP_ERR_TO_COND(WSAEINTR, interrupted);
+ MAP_ERR_TO_COND(WSAEINVAL, invalid_argument);
+ MAP_ERR_TO_COND(WSAEMFILE, too_many_files_open);
+ MAP_ERR_TO_COND(WSAENAMETOOLONG, filename_too_long);
+ default:
+ return std::error_code(EV, std::system_category());
+ }
+}
+
+#endif
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