v8/test/mjsunit/debug-evaluate-locals.js
kmillikin@chromium.org 8a9eeaf8da Reapply change to with/arguments interaction.
This is svn r6415 with a bugfix.

The bug was that we can have scopes with 0 heap slots (functions with
such scopes do not need a local context) and scopes with at least
Context::MIN_CONTEXT_SLOTS.  The code generator only allocated a local
context if there were strictly more than Context::MIN_CONTEXT_SLOTS.
Before the change to with/arguments, it was impossible to actually get
a function scope with exactly Context::MIN_CONTEXT_SLOTS because every
such scope included a heap-allocated arguments (and arguments shadow)
slot.

Review URL: http://codereview.chromium.org/6248014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6426 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2011-01-21 11:28:35 +00:00

130 lines
4.2 KiB
JavaScript

// Copyright 2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --expose-debug-as debug
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug
listenerComplete = false;
exception = false;
function checkFrame0(name, value) {
assertTrue(name == 'a' || name == 'b', 'frame0 name');
if (name == 'a') {
assertEquals(1, value);
} else if (name == 'b') {
assertEquals(2, value);
}
}
function checkFrame1(name, value) {
assertTrue(name == '.arguments' || name == 'arguments' || name == 'a',
'frame1 name');
if (name == 'a') {
assertEquals(3, value);
}
}
function checkFrame2(name, value) {
assertTrue(name == 'a' || name == 'b', 'frame2 name');
if (name == 'a') {
assertEquals(5, value);
} else if (name == 'b') {
assertEquals(0, value);
}
}
function listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Break)
{
// Frame 0 has normal variables a and b.
var frame0 = exec_state.frame(0);
checkFrame0(frame0.localName(0), frame0.localValue(0).value());
checkFrame0(frame0.localName(1), frame0.localValue(1).value());
// Frame 1 has normal variables a and arguments (and the .arguments
// variable).
var frame1 = exec_state.frame(1);
checkFrame1(frame1.localName(0), frame1.localValue(0).value());
checkFrame1(frame1.localName(1), frame1.localValue(1).value());
checkFrame1(frame1.localName(2), frame1.localValue(2).value());
// Frame 2 has normal variables a and b.
var frame2 = exec_state.frame(2);
checkFrame2(frame2.localName(0), frame2.localValue(0).value());
checkFrame2(frame2.localName(1), frame2.localValue(1).value());
// Evaluating a and b on frames 0, 1 and 2 produces 1, 2, 3, 4, 5 and 6.
assertEquals(1, exec_state.frame(0).evaluate('a').value());
assertEquals(2, exec_state.frame(0).evaluate('b').value());
assertEquals(3, exec_state.frame(1).evaluate('a').value());
assertEquals(4, exec_state.frame(1).evaluate('b').value());
assertEquals(5, exec_state.frame(2).evaluate('a').value());
assertEquals(6, exec_state.frame(2).evaluate('b').value());
// Indicate that all was processed.
listenerComplete = true;
}
} catch (e) {
exception = e
};
};
// Add the debug event listener.
Debug.setListener(listener);
function h() {
var a = 1;
var b = 2;
debugger; // Breakpoint.
};
function g() {
var a = 3;
eval("var b = 4;");
h();
};
function f() {
var a = 5;
var b = 0;
with ({b:6}) {
g();
}
};
f();
// Make sure that the debug event listener vas invoked.
assertTrue(listenerComplete);
assertFalse(exception, "exception in listener")