717394492d
For objects which only have simple assignments of the form this.x = ...; a specialized constructor stub is now generated. This generated code allocates the object and fills in the initial properties directly. If this fails for some reason code continues in the generic constructor stub which in turn might pass control to the runtime system. Added counter to see how many objects are constructed using a specialized stub. The specialized stub is only implemented for ia32 architecture in this change. For x64 and ARM the generic construct stub is used. This is change is identical to http://codereview.chromium.org/174392 (committed in r2753 and reverted in r2754) except that a few parts have already been committed from http://codereview.chromium.org/173469 (committed in r2762). Review URL: http://codereview.chromium.org/173470 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2764 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
79 lines
2.8 KiB
JavaScript
79 lines
2.8 KiB
JavaScript
// Copyright 2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --expose-debug-as debug
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// Get the Debug object exposed from the debug context global object.
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Debug = debug.Debug
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// Simple debug event handler which counts the number of breaks hit and steps.
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var break_break_point_hit_count = 0;
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function listener(event, exec_state, event_data, data) {
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if (event == Debug.DebugEvent.Break) {
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break_break_point_hit_count++;
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// Continue stepping until returned to bottom frame.
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if (exec_state.frameCount() > 1) {
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exec_state.prepareStep(Debug.StepAction.StepIn);
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}
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// Test that there is a script.
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assertTrue(typeof(event_data.func().script()) == 'object');
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}
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};
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// Add the debug event listener.
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Debug.setListener(listener);
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// Test step into constructor with simple constructor.
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function X() {
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}
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function f() {
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debugger;
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new X();
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};
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break_break_point_hit_count = 0;
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f();
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assertEquals(5, break_break_point_hit_count);
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f();
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assertEquals(10, break_break_point_hit_count);
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f();
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assertEquals(15, break_break_point_hit_count);
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// Test step into constructor with builtin constructor.
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function g() {
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debugger;
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new Date();
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};
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break_break_point_hit_count = 0;
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g();
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assertEquals(4, break_break_point_hit_count);
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// Get rid of the debug event listener.
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Debug.setListener(null);
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