v8/test/mjsunit/debug-mirror-cache.js

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// 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
// The functions used for testing backtraces. They are at the top to make the
// testing of source line/column easier.
function f(x, y) {
a=1;
};
function g() {
new f(1);
};
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug
listenerCallCount = 0;
listenerExceptions = [];
function listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Break)
{
listenerCallCount++;
// Check that mirror cache is cleared when entering debugger.
assertTrue(debug.MirrorCacheIsEmpty(), "Mirror cache not cleared");
// Get the debug command processor in paused state.
var dcp = exec_state.debugCommandProcessor(false);
// Make a backtrace request to create some mirrors.
var json;
json = '{"seq":0,"type":"request","command":"backtrace"}'
dcp.processDebugJSONRequest(json);
// Make sure looking up loaded scripts does not clear the cache.
Debug.scripts();
// Some mirrors where cached.
assertFalse(debug.MirrorCacheIsEmpty(), "Mirror cache not used");
}
} catch (e) {
print(e);
listenerExceptions.push(e);
};
};
// Add the debug event listener.
Debug.setListener(listener);
// Enter the debugger twice.
debugger;
debugger;
assertEquals([], listenerExceptions, "Exception in listener");
// Make sure that the debug event listener vas invoked.
assertEquals(2, listenerCallCount, "Listener not called");