[wasm] More extensive indirect dispatch signature mismatch tests.

test/mjsunit/wasm/indirect-sig-mismatch.js

+// Copyright 2016 the V8 project authors. All rights reserved.

[Clemens Hammacher, 2017/07/24 11:50:23]

2017

[titzer, 2017/07/24 11:57:39]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --expose-wasm
+
+load("test/mjsunit/wasm/wasm-constants.js");
+load("test/mjsunit/wasm/wasm-module-builder.js");
+
+const kTableSize = 3;
+
+var m_i_v;
+var m_i_i;
+var m_i_ii;
+
+(function BuildExportedMethods() {
+  print("BuildingExportedMethods...");
+  let builder = new WasmModuleBuilder();
+
+  let sig_v_v = builder.addType(kSig_v_v);
+  let sig_i_ii = builder.addType(kSig_i_ii);
+  let sig_i_i = builder.addType(kSig_i_i);
+  let sig_i_v = builder.addType(kSig_i_v);
+
+  print("exported[i_v]  = " + sig_i_v);
+  print("exported[i_i]  = " + sig_i_i);
+  print("exported[i_ii] = " + sig_i_ii);
+
+  builder.addFunction("", sig_i_v)
+    .addBody([
+      kExprI32Const, 41])  // --
+    .exportAs("m_i_v");
+
+  builder.addFunction("m_i_i", sig_i_i)
+    .addBody([
+      kExprI32Const, 42])  // --
+    .exportAs("m_i_i");
+
+  builder.addFunction("m_i_ii", sig_i_ii)
+    .addBody([
+      kExprI32Const, 43])  // --
+    .exportAs("m_i_ii");
+
+  let module = new WebAssembly.Module(builder.toBuffer());
+  let instance = new WebAssembly.Instance(module);
+  m_i_v = instance.exports.m_i_v;
+  m_i_i = instance.exports.m_i_i;
+  m_i_ii = instance.exports.m_i_ii;
+
+  m_i_v.sig = kSig_i_v;
+  m_i_i.sig = kSig_i_i;
+  m_i_ii.sig = kSig_i_ii;

[Clemens Hammacher, 2017/07/24 11:50:23]

I don't get what this test is supposed to test.

[titzer, 2017/07/24 11:57:39]

What this does is record the signature of the global exported functions m_*
(from the first module) as a property on those functions. That way the test loop
below can check this signature against the signature attached below on the
functions exported from the second module.

[Clemens Hammacher, 2017/07/24 12:09:36]

Ah, I see. Thanks for the explanation.

+})();
+
+function caller_module() {
+  let builder = new WasmModuleBuilder();
+
+  let sig_i_v = builder.addType(kSig_i_v);
+  let sig_i_ii = builder.addType(kSig_i_ii);
+  let sig_i_i = builder.addType(kSig_i_i);
+
+  print("imported[i_v]  = " + sig_i_v);
+  print("imported[i_i]  = " + sig_i_i);
+  print("imported[i_ii] = " + sig_i_ii);
+
+
+  builder.addFunction("call1", sig_i_i)
+    .addBody([
+      kExprGetLocal, 0, // --
+      kExprCallIndirect, sig_i_v, kTableZero])  // --
+    .exportAs("call1");
+
+  builder.addFunction("call2", sig_i_i)
+    .addBody([
+      kExprI32Const, 11, // --
+      kExprGetLocal, 0,
+      kExprCallIndirect, sig_i_i, kTableZero])  // --
+    .exportAs("call2");
+
+  builder.addFunction("call3", sig_i_i)
+    .addBody([
+      kExprI32Const, 21,
+      kExprI32Const, 22,
+      kExprGetLocal, 0,
+      kExprCallIndirect, sig_i_ii, kTableZero])  // --
+    .exportAs("call3");
+
+  builder.addImportedTable("imp", "table", kTableSize, kTableSize);
+
+  return builder.toModule();
+}
+
+function call(func, ...args) {
+  try {
+    return "" + func.apply(undefined, args);
+  } catch (e) {
+    return "!" + e;
+  }
+}
+
+function DoCalls(table, calls) {
+  for (func of calls) {
+    print("func = " + func);
+    for (var i = 0; i < 4; i++) {
+      print("  i = " + i);
+      var expectThrow = true;
+      var exp = null;
+      if (i < table.length) {
+        exported = table.get(i);
+        expectThrow = (exported.sig != func.sig);
+        print("     exp=" + exp);

[Clemens Hammacher, 2017/07/24 11:50:23]

Do you want to print the variable {exported}? {exp} is always null.

[titzer, 2017/07/24 11:57:39]

Good catch. One does not simply rename variables in JavaScript ;-)

+        print("     throw=" + expectThrow);
+      } else {
+        print("     exp=<oob>");
+      }
+      print("     result=" + call(func, i));
+      if (expectThrow) {
+        assertThrows(() => func(i), WebAssembly.RuntimeError);
+      } else {
+        assertEquals(exported(0), func(i));
+      }
+    }
+  }
+}
+
+(function TestExecute() {
+  print("TestExecute");
+  let module = caller_module();
+  let table = new WebAssembly.Table({element: "anyfunc",
+    initial: kTableSize, maximum: kTableSize});
+  let instance = new WebAssembly.Instance(module, {imp: {table: table}});
+  instance.exports.call1.sig = kSig_i_v;
+  instance.exports.call2.sig = kSig_i_i;
+  instance.exports.call3.sig = kSig_i_ii;
+
+  let exports = [m_i_v, m_i_i, m_i_ii];
+  let calls = [instance.exports.call1,
+               instance.exports.call2,
+               instance.exports.call3];
+
+  for (f0 of exports) {
+    for (f1 of exports) {
+      for (f2 of exports) {
+        table.set(0, f0);
+        table.set(1, f1);
+        table.set(2, f2);
+
+        DoCalls(table, calls);
+      }
+    }
+  }
+})();