1 files changed, 73 insertions, 0 deletions
diff --git a/lib/Support/ErrorHandling.cpp b/lib/Support/ErrorHandling.cpp
new file mode 100644
index 0000000..dff4f03
--- /dev/null
+++ b/lib/Support/ErrorHandling.cpp
@@ -0,0 +1,73 @@
+//===- lib/Support/ErrorHandling.cpp - Callbacks for errors -----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// 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.
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/System/Threading.h"
+#include <cassert>
+#include <cstdlib>
+
+using namespace llvm;
+using namespace std;
+
+static llvm_error_handler_t ErrorHandler = 0;
+static void *ErrorHandlerUserData = 0;
+
+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");
+  assert(!ErrorHandler && "Error handler already registered!\n");
+  ErrorHandler = handler;
+  ErrorHandlerUserData = user_data;
+}
+
+void llvm_remove_error_handler() {
+  ErrorHandler = 0;
+}
+
+void llvm_report_error(const char *reason) {
+  llvm_report_error(Twine(reason));
+}
+
+void llvm_report_error(const std::string &reason) {
+  llvm_report_error(Twine(reason));
+}
+
+void llvm_report_error(const Twine &reason) {
+  if (!ErrorHandler) {
+    errs() << "LLVM ERROR: " << reason << "\n";
+  } else {
+    ErrorHandler(ErrorHandlerUserData, reason.str());
+  }
+  exit(1);
+}
+
+void 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.
+  if (msg)
+    errs() << msg << "\n";
+  errs() << "UNREACHABLE executed";
+  if (file)
+    errs() << " at " << file << ":" << line;
+  errs() << "!\n";
+  abort();
+}
+}
+