1 files changed, 63 insertions, 0 deletions
diff --git a/wasm/InputEvent.h b/wasm/InputEvent.h
new file mode 100644
index 000000000000..d7c12627bd3d
--- /dev/null
+++ b/wasm/InputEvent.h
@@ -0,0 +1,63 @@
+//===- InputEvent.h ---------------------------------------------*- C++ -*-===//
+//
+//                             The LLVM Linker
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Wasm events are features that suspend the current execution and transfer the
+// control flow to a corresponding handler. Currently the only supported event
+// kind is exceptions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLD_WASM_INPUT_EVENT_H
+#define LLD_WASM_INPUT_EVENT_H
+
+#include "Config.h"
+#include "InputFiles.h"
+#include "WriterUtils.h"
+#include "lld/Common/ErrorHandler.h"
+#include "llvm/Object/Wasm.h"
+
+namespace lld {
+namespace wasm {
+
+// Represents a single Wasm Event within an input file. These are combined to
+// form the final EVENTS section.
+class InputEvent {
+public:
+  InputEvent(const WasmSignature &S, const WasmEvent &E, ObjFile *F)
+      : File(F), Event(E), Signature(S), Live(!Config->GcSections) {}
+
+  StringRef getName() const { return Event.SymbolName; }
+  const WasmEventType &getType() const { return Event.Type; }
+
+  uint32_t getEventIndex() const { return EventIndex.getValue(); }
+  bool hasEventIndex() const { return EventIndex.hasValue(); }
+  void setEventIndex(uint32_t Index) {
+    assert(!hasEventIndex());
+    EventIndex = Index;
+  }
+
+  ObjFile *File;
+  WasmEvent Event;
+  const WasmSignature &Signature;
+
+  bool Live = false;
+
+protected:
+  llvm::Optional<uint32_t> EventIndex;
+};
+
+} // namespace wasm
+
+inline std::string toString(const wasm::InputEvent *E) {
+  return (toString(E->File) + ":(" + E->getName() + ")").str();
+}
+
+} // namespace lld
+
+#endif // LLD_WASM_INPUT_EVENT_H