2bf71f888f
Replaces the graph-based liveness analyzer in the bytecode graph builder with an initial bytecode-based liveness analysis pass, which is added to the existing loop extent analysis. Now the StateValues in the graph have their inputs initialised to optimized_out, rather than being modified after the graph is built. Review-Url: https://codereview.chromium.org/2523893003 Cr-Commit-Position: refs/heads/master@{#41355}
71 lines
2.4 KiB
JavaScript
71 lines
2.4 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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//
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// Flags: --noanalyze-environment-liveness
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// Test that a variable in the local scope that shadows a context-allocated
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// variable is correctly resolved when being evaluated in the debugger.
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Debug = debug.Debug;
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var exception = false;
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function listener(event, exec_state, event_data, data) {
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if (event != Debug.DebugEvent.Break) return;
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var breakpoint = exec_state.frame(0);
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try {
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// Assert correct break point.
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assertTrue(breakpoint.sourceLineText().indexOf("// Break") > -1);
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// Assert correct value.
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assertEquals(3, breakpoint.evaluate('x').value());
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} catch (e) {
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exception = e;
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}
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}
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Debug.setListener(listener);
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function h() {
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var x; // Context-allocated due to g().
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var g = function g() {
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x = -7;
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};
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var f = function f() {
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var x = 3; // Allocated in the local scope.
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debugger; // Break.
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};
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f();
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}
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h();
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assertFalse(exception);
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