wasm-getAllColumnOffsets.js

Enable keyboard shortcuts

// |jit-test| test-also=--wasm-compiler=optimizing; skip-if: !wasmDebuggingEnabled()

// Tests that wasm module scripts have column and line to bytecode offset

// information when source text is generated.

load(libdir + "asserts.js");

// Checking if experimental format generates internal source map to binary file

// by querying debugger scripts getAllColumnOffsets.

function getAllOffsets(wast) {

  var sandbox = newGlobal({newCompartment: true});

  var dbg = new Debugger();

  dbg.addDebuggee(sandbox);

  dbg.allowWasmBinarySource = true;

  sandbox.eval(`

    var wasm = wasmTextToBinary('${wast}');

    var m = new WebAssembly.Instance(new WebAssembly.Module(wasm));

`);

  var wasmScript = dbg.findScripts().filter(s => s.format == 'wasm')[0];

  return wasmScript.getAllColumnOffsets();

var offsets1 = getAllOffsets('(module \

  (func (nop)) \

  (func (drop (f32.sqrt (f32.add (f32.const 1.0) (f32.const 2.0))))) \

)');

// There shall be total 5 lines with single and unique offset per line.

var usedOffsets = Object.create(null),

    usedLines = Object.create(null);

assertEq(offsets1.length, 5);

offsets1.forEach(({offset, lineNumber, columnNumber}) => {

  assertEq(offset > 0, true);

  assertEq(lineNumber > 0, true);

  assertEq(columnNumber > 0, true);

  usedOffsets[offset] = true;

  usedLines[lineNumber] = true;

});

assertEq(Object.keys(usedOffsets).length, 5);

assertEq(Object.keys(usedLines).length, 5);