Wasm-instrumentation

Wasm-instrumentation is a WebAssembly instrument tool using binaryen to implement function mock and coverage collection.

Install wasm-instrumentation

npm i -D wasm-instrumentation

How to use

import initInstrumenter from "wasm-instrumentation";

export async function instrument() {
  const instrumenter = await initInstrumenter();
  const source = instrumenter.allocateUTF8("./build.wasm");
  const output = instrumenter.allocateUTF8("./build.instrumented.wasm");
  const report = instrumenter.allocateUTF8("covInstrument/traceExpression");
  const sourceMap = instrumenter.allocateUTF8("./build.wasm.map");
  const debugInfo = instrumenter.allocateUTF8("./build.debugInfo.json");
  const expectInfo = instrumenter.allocateUTF8("./build.expectInfo.json");

  instrumenter._wasm_instrument(source, output, report, sourceMap, expectInfo, debugInfo, null, null, true);
}

API

_wasm_instrument(sourceWasm, outputWasm, reportFunctionName, sourceMap, expectInfo, debugInfo, include, exclude, skipLib)

• sourceWasm: source wasm file path
• outputWasm: output wasm file path after instrumentation
• reportFunctionName: instrument function, default: "covInstrument/traceExpression"
• sourceMap: source map file of source wasm
• expectInfo: expectInfo file path after instrumentation
• debugInfo: debugInfo file path after instrumentation
• includes: An array of Regex indicate which function shoule be included. eg. ["assembly/.","src/."]
• excludes: An array of Regex indicate which function shoule be excluded. eg. ["test/.*"]
• skipLib: if skip the Assemblyscript lib functions