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// Copyright 2010 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.
// Scenario: some function is being edited; the outer function has to have its
// positions patched. Accoring to a special markup of function text
// corresponding byte-code PCs should coincide before change and after it.
Debug = debug.Debug
Debug.setListener(function() {});
eval(
"function F1() { return 5; }\n" +
"function ChooseAnimal(/*$*/ ) {\n" +
"/*$*/ var x = F1(/*$*/ );\n" +
"/*$*/ var res/*$*/ =/*$*/ (function() { return 'Cat'; } )();\n" +
"/*$*/ var y/*$*/ = F2(/*$*/ F1()/*$*/ , F1(/*$*/ )/*$*/ );\n" +
"/*$*/ if (/*$*/ x.toString(/*$*/ )) { /*$*/ y = 3;/*$*/ } else {/*$*/ y = 8;/*$*/ }\n" +
"/*$*/ var z = /*$*/ x * y;\n" +
"/*$*/ return/*$*/ res/*$*/ + z;/*$*/ }\n" +
"function F2(x, y) { return x + y; }"
);
// Find all *$* markers in text of the function and read corresponding statement
// PCs.
function ReadMarkerPositions(func) {
var text = func.toString();
var positions = new Array();
var match;
var pattern = /\/\*\$\*\//g;
while ((match = pattern.exec(text)) != null) {
positions.push(match.index);
}
return positions;
}
function ReadPCMap(func, positions) {
var res = new Array();
for (var i = 0; i < positions.length; i++) {
var pc = Debug.LiveEdit.GetPcFromSourcePos(func, positions[i]);
if (typeof pc === 'undefined') {
// Function was marked for recompilation and it's code was replaced with a
// stub. This can happen at any time especially if we are running with
// --stress-opt. There is no way to get PCs now.
return;
}
res.push(pc);
}
return res;
}
function ApplyPatch(orig_animal, new_animal) {
var res = ChooseAnimal();
assertEquals(orig_animal + "15", res);
var script = Debug.findScript(ChooseAnimal);
var orig_string = "'" + orig_animal + "'";
var patch_string = "'" + new_animal + "'";
var patch_pos = script.source.indexOf(orig_string);
var change_log = new Array();
Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script,
patch_pos,
orig_string.length,
patch_string,
change_log);
print("Change log: " + JSON.stringify(change_log) + "\n");
var markerPositions = ReadMarkerPositions(ChooseAnimal);
var pcArray = ReadPCMap(ChooseAnimal, markerPositions);
var res = ChooseAnimal();
assertEquals(new_animal + "15", res);
return pcArray;
}
var pcArray1 = ApplyPatch('Cat', 'Dog');
// When we patched function for the first time it was deoptimized.
// Check that after the second patch maping between sources position and
// pcs will not change.
var pcArray2 = ApplyPatch('Dog', 'Capybara');
print(pcArray1);
print(pcArray2);
// Function can be marked for recompilation at any point (especially if we are
// running with --stress-opt). When we mark function for recompilation we
// replace it's code with stub. So there is no reliable way to get PCs for
// function.
if (pcArray1 && pcArray2) {
assertArrayEquals(pcArray1, pcArray2);
}
Debug.setListener(null);
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