1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/wasm-getAllColumnOffsets.js b/js/src/jit-test/tests/debug/wasm-getAllColumnOffsets.js
new file mode 100644
index 0000000000..58e85f1d84
--- /dev/null
+++ b/js/src/jit-test/tests/debug/wasm-getAllColumnOffsets.js
@@ -0,0 +1,41 @@
+// |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 8 lines with single and unique offset per line.
+var usedOffsets = Object.create(null),
+    usedLines = Object.create(null);
+assertEq(offsets1.length, 8);
+
+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, 8);
+assertEq(Object.keys(usedLines).length, 8);