7f43cf0539
Before, we conservatively marked every variable in a scope as used if the scope contained 'with'. Instead, just mark the variables occurring in the body of the with. This avoids marking 'arguments' as used whenever 'with' occurs, which incurs an extra performance penalty (a use of arguments is seen as an instruction to redirect all parameter accesses to the arguments object). Review URL: http://codereview.chromium.org/6357007 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6415 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
131 lines
4.2 KiB
JavaScript
131 lines
4.2 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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listenerComplete = false;
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exception = false;
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function checkFrame0(name, value) {
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assertTrue(name == 'a' || name == 'b', 'check name');
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if (name == 'a') {
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assertEquals(1, value);
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} else if (name == 'b') {
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assertEquals(2, value);
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}
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}
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function checkFrame1(name, value) {
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assertTrue(name == '.arguments' || name == 'arguments' || name == 'a',
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'check name');
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if (name == 'a') {
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assertEquals(3, value);
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}
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}
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function checkFrame2(name, value) {
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assertTrue(name == 'a' || name == 'b');
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if (name == 'a') {
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assertEquals(5, value);
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}
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if (name == 'b') {
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assertEquals(0, value);
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}
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}
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function listener(event, exec_state, event_data, data) {
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try {
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if (event == Debug.DebugEvent.Break)
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{
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// Frame 0 has normal variables a and b.
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var frame0 = exec_state.frame(0);
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checkFrame0(frame0.localName(0), frame0.localValue(0).value());
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checkFrame0(frame0.localName(1), frame0.localValue(1).value());
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// Frame 1 has normal variables a and arguments (and the .arguments
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// variable).
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var frame1 = exec_state.frame(1);
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checkFrame1(frame1.localName(0), frame1.localValue(0).value());
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checkFrame1(frame1.localName(1), frame1.localValue(1).value());
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checkFrame1(frame1.localName(2), frame1.localValue(2).value());
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// Frame 2 has normal variables a and b.
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var frame2 = exec_state.frame(2);
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checkFrame2(frame2.localName(0), frame2.localValue(0).value());
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checkFrame2(frame2.localName(1), frame2.localValue(1).value());
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// Evaluating a and b on frames 0, 1 and 2 produces 1, 2, 3, 4, 5 and 6.
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assertEquals(1, exec_state.frame(0).evaluate('a').value());
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assertEquals(2, exec_state.frame(0).evaluate('b').value());
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assertEquals(3, exec_state.frame(1).evaluate('a').value());
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assertEquals(4, exec_state.frame(1).evaluate('b').value());
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assertEquals(5, exec_state.frame(2).evaluate('a').value());
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assertEquals(6, exec_state.frame(2).evaluate('b').value());
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// Indicate that all was processed.
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listenerComplete = true;
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}
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} catch (e) {
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exception = e
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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 h() {
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var a = 1;
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var b = 2;
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debugger; // Breakpoint.
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};
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function g() {
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var a = 3;
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eval("var b = 4;");
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h();
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};
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function f() {
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var a = 5;
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var b = 0;
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with ({b:6}) {
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g();
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}
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};
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f();
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// Make sure that the debug event listener vas invoked.
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assertTrue(listenerComplete);
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assertFalse(exception, "exception in listener")
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