WIP: wasm oob trap handling experiments

src/wasm/wasm-module.h

Index: src/wasm/wasm-module.h
diff --git a/src/wasm/wasm-module.h b/src/wasm/wasm-module.h
index 4dffe6d46811a766456461c696517bae0aa1d194..a85ab2f0e2c96e2e5787e64e3a8d1970893ccefa 100644
--- a/src/wasm/wasm-module.h
+++ b/src/wasm/wasm-module.h
@@ -30,6 +30,13 @@ const uint32_t kWasmMagic = 0x6d736100;
 const uint32_t kWasmVersion = 0x0b;
 const uint8_t kWasmFunctionTypeForm = 0x40;
 
+struct TrapHandlerData {
+  Code* code;
+  TrapHandlerData* next;
+};
+
+extern TrapHandlerData* gTrapHandlers;
+
 // WebAssembly sections are named as strings in the binary format, but
 // internally V8 uses an enum to handle them.
 //