1 files changed, 270 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/async-stack-traces.js b/deps/v8/test/mjsunit/async-stack-traces.js
new file mode 100644
index 0000000000..05cf8a095f
--- /dev/null
+++ b/deps/v8/test/mjsunit/async-stack-traces.js
@@ -0,0 +1,270 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --async-stack-traces
+
+// Basic test with an explicit throw.
+(function() {
+  async function one(x) {
+    await two(x);
+  }
+
+  async function two(x) {
+    await x;
+    throw new Error();
+  }
+
+  async function test(f) {
+    try {
+      await f(1);
+      assertUnreachable();
+    } catch (e) {
+      assertInstanceof(e, Error);
+      assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
+    }
+  }
+
+  assertPromiseResult((async () => {
+    await test(one);
+    await test(one);
+    %OptimizeFunctionOnNextCall(two);
+    await test(one);
+    %OptimizeFunctionOnNextCall(one);
+    await test(one);
+  })());
+})();
+
+// Basic test with an implicit throw (via ToNumber on Symbol).
+(function() {
+  async function one(x) {
+    return await two(x);
+  }
+
+  async function two(x) {
+    await x;
+    return +x;  // This will raise a TypeError.
+  }
+
+  async function test(f) {
+    try {
+      await f(Symbol());
+      assertUnreachable();
+    } catch (e) {
+      assertInstanceof(e, TypeError);
+      assertMatches(/TypeError.+at two.+at async one.+at async test/ms, e.stack);
+    }
+  }
+
+  assertPromiseResult((async() => {
+    await test(one);
+    await test(one);
+    %OptimizeFunctionOnNextCall(two);
+    await test(one);
+    %OptimizeFunctionOnNextCall(one);
+    await test(one);
+  })());
+})();
+
+// Basic test with throw in inlined function.
+(function() {
+  function throwError() {
+    throw new Error();
+  }
+
+  async function one(x) {
+    return await two(x);
+  }
+
+  async function two(x) {
+    await x;
+    return throwError();
+  }
+
+  async function test(f) {
+    try {
+      await f(1);
+      assertUnreachable();
+    } catch (e) {
+      assertInstanceof(e, Error);
+      assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
+    }
+  }
+
+  assertPromiseResult((async() => {
+    await test(one);
+    await test(one);
+    %OptimizeFunctionOnNextCall(two);
+    await test(one);
+    %OptimizeFunctionOnNextCall(one);
+    await test(one);
+  })());
+})();
+
+// Basic test with async function inlined into sync function.
+(function() {
+  function callOne(x) {
+    return one(x);
+  }
+
+  function callTwo(x) {
+    return two(x);
+  }
+
+  async function one(x) {
+    return await callTwo(x);
+  }
+
+  async function two(x) {
+    await x;
+    throw new Error();
+  }
+
+  async function test(f) {
+    try {
+      await f(1);
+      assertUnreachable();
+    } catch (e) {
+      assertInstanceof(e, Error);
+      assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
+    }
+  }
+
+  assertPromiseResult((async() => {
+    await test(callOne);
+    await test(callOne);
+    %OptimizeFunctionOnNextCall(callTwo);
+    await test(callOne);
+    %OptimizeFunctionOnNextCall(callOne);
+    await test(callOne);
+  })());
+})();
+
+// Basic test with async functions and promises chained via
+// Promise.prototype.then(), which should still work following
+// the generic chain upwards.
+(function() {
+  async function one(x) {
+    return await two(x).then(x => x);
+  }
+
+  async function two(x) {
+    await x.then(x => x);
+    throw new Error();
+  }
+
+  async function test(f) {
+    try {
+      await f(Promise.resolve(1));
+      assertUnreachable();
+    } catch (e) {
+      assertInstanceof(e, Error);
+      assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
+    }
+  }
+
+  assertPromiseResult((async() => {
+    await test(one);
+    await test(one);
+    %OptimizeFunctionOnNextCall(two);
+    await test(one);
+    %OptimizeFunctionOnNextCall(one);
+    await test(one);
+  })());
+})();
+
+// Basic test for async generators called from async
+// functions with an explicit throw.
+(function() {
+  async function one(x) {
+    for await (const y of two(x)) {}
+  }
+
+  async function* two(x) {
+    await x;
+    throw new Error();
+  }
+
+  async function test(f) {
+    try {
+      await f(1);
+      assertUnreachable();
+    } catch (e) {
+      assertInstanceof(e, Error);
+      assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
+    }
+  }
+
+  assertPromiseResult((async () => {
+    await test(one);
+    await test(one);
+    %OptimizeFunctionOnNextCall(two);
+    await test(one);
+    %OptimizeFunctionOnNextCall(one);
+    await test(one);
+  })());
+})();
+
+// Basic test for async functions called from async
+// generators with an explicit throw.
+(function() {
+  async function* one(x) {
+    await two(x);
+  }
+
+  async function two(x) {
+    await x;
+    throw new Error();
+  }
+
+  async function test(f) {
+    try {
+      for await (const x of f(1)) {}
+      assertUnreachable();
+    } catch (e) {
+      assertInstanceof(e, Error);
+      assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
+    }
+  }
+
+  assertPromiseResult((async () => {
+    await test(one);
+    await test(one);
+    %OptimizeFunctionOnNextCall(two);
+    await test(one);
+    %OptimizeFunctionOnNextCall(one);
+    await test(one);
+  })());
+})();
+
+// Basic test for async functions called from async
+// generators with an explicit throw (with yield).
+(function() {
+  async function* one(x) {
+    yield two(x);
+  }
+
+  async function two(x) {
+    await x;
+    throw new Error();
+  }
+
+  async function test(f) {
+    try {
+      for await (const x of f(1)) {}
+      assertUnreachable();
+    } catch (e) {
+      assertInstanceof(e, Error);
+      assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
+    }
+  }
+
+  assertPromiseResult((async () => {
+    await test(one);
+    await test(one);
+    %OptimizeFunctionOnNextCall(two);
+    await test(one);
+    %OptimizeFunctionOnNextCall(one);
+    await test(one);
+  })());
+})();