wasmi interpreter (#7796)

ethcore/src/executive.rs

@@ -156,11 +156,7 @@ impl TransactOptions<trace::NoopTracer, trace::NoopVMTracer> {
 
 pub fn executor(machine: &Machine, vm_factory: &Factory, params: &ActionParams) -> Box<vm::Vm> {
 	if machine.supports_wasm() && params.code.as_ref().map_or(false, |code| code.len() > 4 && &code[0..4] == WASM_MAGIC_NUMBER) {
-		Box::new(
-			wasm::WasmInterpreter::new()
-				// prefer to fail fast
-				.expect("Failed to create wasm runtime")
-		)
+		Box::new(wasm::WasmInterpreter)
 	} else {
 		vm_factory.create(params.gas)
 	}

ethcore/vm/src/schedule.rs

@@ -127,20 +127,19 @@ pub struct WasmCosts {
 	pub mul: u32,
 	/// Memory (load/store) operations multiplier.
 	pub mem: u32,
-	/// Memory copy operation, per byte.
-	pub mem_cmp: u32,
-	/// Memory copy operation, per byte.
-	pub mem_copy: u32,
-	/// Memory move operation, per byte.
-	pub mem_move: u32,
-	/// Memory set operation, per byte.
-	pub mem_set: u32,
-	/// Static region charge, per byte.
-	pub static_region: u32,
 	/// General static query of U256 value from env-info
 	pub static_u256: u32,
 	/// General static query of Address value from env-info
 	pub static_address: u32,
+	/// Memory stipend. Amount of free memory (in 64kb pages) each contract can use for stack.
+	pub initial_mem: u32,
+	/// Grow memory cost, per page (64kb)
+	pub grow_mem: u32,
+	/// Cost of wasm opcode is calculated as TABLE_ENTRY_COST * `opcodes_mul` / `opcodes_div`
+	pub opcodes_mul: u32,
+	/// Cost of wasm opcode is calculated as TABLE_ENTRY_COST * `opcodes_mul` / `opcodes_div`
+	pub opcodes_div: u32,
+
 }
 
 impl Default for WasmCosts {
@@ -150,13 +149,12 @@ impl Default for WasmCosts {
 			div: 16,
 			mul: 4,
 			mem: 2,
-			mem_cmp: 1,
-			mem_copy: 1,
-			mem_move: 1,
-			mem_set: 1,
-			static_region: 1,
 			static_u256: 64,
 			static_address: 40,
+			initial_mem: 4096,
+			grow_mem: 8192,
+			opcodes_mul: 3,
+			opcodes_div: 8,
 		}
 	}
 }

ethcore/wasm/Cargo.toml

@@ -8,8 +8,9 @@ byteorder = "1.0"
 ethcore-util = { path = "../../util" }
 ethcore-bigint = { path = "../../util/bigint" }
 log = "0.3"
-parity-wasm = "0.15"
+parity-wasm = "0.23"
 libc = "0.2"
 wasm-utils = { git = "https://github.com/paritytech/wasm-utils" }
 vm = { path = "../vm" }
 ethcore-logger = { path = "../../logger" }
+wasmi = { git = "https://github.com/pepyakin/wasmi" }

ethcore/wasm/run/src/runner.rs

@@ -16,7 +16,7 @@ fn load_code<P: AsRef<path::Path>>(p: P) -> io::Result<Vec<u8>> {
 }
 
 fn wasm_interpreter() -> WasmInterpreter {
-	WasmInterpreter::new().expect("wasm interpreter to create without errors")
+	WasmInterpreter
 }
 
 #[derive(Debug)]