a760b82cab
This changes the compiler to be more aggressive about lazy compilation of closures with non-trivial outer context. Compilation can only be triggered with a valid outer context now. One exception is the debugger, which can request compilation of arbitrary shared code, but it ensures to trigger compilation only at points where no context is needed. This relands r11782, r11783, r11790 and a minor fix. R=ulan@chromium.org TEST=mjsunit/debug-script-breakpoints-nested Review URL: https://chromiumcodereview.appspot.com/10543141 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11866 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
68 lines
2.7 KiB
JavaScript
68 lines
2.7 KiB
JavaScript
// Copyright 2012 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 just counts the number of break points hit.
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var 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_point_hit_count++;
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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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function makeClosure() {
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var x;
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return function() {
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return x; // Breakpoint line ( #47 )
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};
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}
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// Create closure before break point is set.
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var closure = makeClosure();
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// The debugger triggers re-compilation.
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assertEquals(0, Debug.scriptBreakPoints().length);
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var scr = Debug.findScript(makeClosure);
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var sbp = Debug.setScriptBreakPointById(scr.id, 47);
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assertEquals(1, Debug.scriptBreakPoints().length);
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// Ensure the closure actually triggers a break point hit.
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closure();
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assertEquals(1, break_point_hit_count);
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// Remove script break point.
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assertEquals(1, Debug.scriptBreakPoints().length);
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Debug.clearBreakPoint(sbp);
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assertEquals(0, Debug.scriptBreakPoints().length);
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