fschneider@google.com
13b7b7242a
Until now there was a large discrepancy between x.f() and (x.f)() This CL makes x.f() as fast as (x.f)() by automatically generating a intermediate dispatcher function that loads the field and invokes the result as a closure. The approach resembles the one taken for fast noSuchMethod invocation and reuses the same per-class cache of dispatcher functions. It also fixes a bug in the debugger so that VM-generated implicit dispatcher functions (like for noSuchMethod, or field-as-method invocation) don't show up the debuggers stack trace. BUG=https://code.google.com/p/dart/issues/detail?id=11041 R=srdjan@google.com Review URL: https://codereview.chromium.org//18750004 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@25001 260f80e4-7a28-3924-810f-c04153c831b5
66 lines
1.8 KiB
Dart
66 lines
1.8 KiB
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// This test forks a second vm process that runs this dart script as
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// a debug target.
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// Run this test with option --wire to see the json messages sent
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// between the processes.
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// Run this test with option --verbose to see the stdout and stderr output
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// of the debug target process.
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import "debug_lib.dart";
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bar(x) {
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print(x);
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}
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main() {
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if (RunScript(testScript)) return;
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print("Hello from debuggee");
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var f = bar;
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f("closure call");
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bar(12);
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var a = new A();
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for (var i = 0; i < 2; ++i) {
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a.foo(i);
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}
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}
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class A {
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A() {
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foo =
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(x) => print(x);
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}
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var foo;
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}
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// Expected debugger events and commands.
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var testScript = [
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MatchFrame(0, "main"), // Top frame in trace is function "main".
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SetBreakpoint(22), // Set breakpoint a line 22, at the closure call.
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Resume(),
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MatchFrame(0, "main"), // Should be at closure call.
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StepInto(),
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MatchFrames(["bar", "main"]), // Should be in closure function now.
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StepOut(),
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MatchFrame(0, "main"), // Back in main, before static call to bar().
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SetBreakpoint(15), // Breakpoint in bar();
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Resume(),
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MatchFrames(["bar", "main"]),
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SetBreakpoint(26), // Breakpoint in main() at a.field(i).
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SetBreakpoint(33), // Breakpoint in closure.
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Resume(),
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MatchFrame(0, "main"), // Should be in main().
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MatchLocals({"i": "0"}),
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StepInto(),
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StepInto(),
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MatchFrames(["A.<anonymous closure>", "main"]), // In closure function.
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Resume(),
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MatchFrame(0, "main"), // Back in main().
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MatchLocals({"i": "1"}),
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Resume(),
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MatchFrames(["A.<anonymous closure>", "main"]), // In closure function.
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Resume()
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];
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