v8/test/mjsunit/debug-step-4-in-frame.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
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug
// Tests how debugger can step over not necessarily in the top frame.
// Simple 3 functions, that protocol their execution state in global
// variable state.
var state;
function f() {
var a = 1978;
for (state[2] = 0; state[2] < 5; state[2]++) {
void String(a);
}
}
function g() {
for (state[1] = 0; state[1] < 5; state[1]++) {
f();
}
}
function h() {
state = [-1, -1, -1];
for (state[0] = 0; state[0] < 5; state[0]++) {
g();
}
}
function TestCase(frame_index, step_count, expected_final_state) {
print("Test case, parameters " + frame_index + "/" + step_count);
var listener_exception = null;
var state_snapshot;
var listener_state;
var bp;
function listener(event, exec_state, event_data, data) {
print("Here ("+event+"/"+listener_state+"): " +
exec_state.frame(0).sourceLineText());
try {
if (event == Debug.DebugEvent.Break) {
if (listener_state == 0) {
Debug.clearBreakPoint(bp);
var context_frame;
if (frame_index !== undefined) {
context_frame = exec_state.frame(frame_index);
}
exec_state.prepareStep(Debug.StepAction.StepNext,
step_count, context_frame);
listener_state = 1;
} else if (listener_state == 1) {
state_snapshot = String(state);
print("State: " + state_snapshot);
Debug.setListener(null);
listener_state = 2;
}
}
} catch (e) {
listener_exception = e;
}
}
// Add the debug event listener.
listener_state = 0;
Debug.setListener(listener);
bp = Debug.setBreakPoint(f, 1);
h();
Debug.setListener(null);
if (listener_exception !== null) {
print("Exception caught: " + listener_exception);
assertUnreachable();
}
assertEquals(expected_final_state, state_snapshot);
}
// Warm-up -- make sure all is compiled and ready for breakpoint.
h();
// Stepping in the default (top) frame.
TestCase(undefined, 0, "0,0,-1");
TestCase(undefined, 1, "0,0,-1");
TestCase(undefined, 2, "0,0,0");
TestCase(undefined, 5, "0,0,1");
TestCase(undefined, 8, "0,0,3");
// Stepping in the frame #0 (should be exactly the same as above).
TestCase(0, 0, "0,0,-1");
TestCase(0, 1, "0,0,-1");
TestCase(0, 2, "0,0,0");
TestCase(0, 5, "0,0,1");
TestCase(0, 8, "0,0,3");
// Stepping in the frame #1.
TestCase(1, 0, "0,0,5");
TestCase(1, 3, "0,1,5");
TestCase(1, 8, "0,4,5");
// Stepping in the frame #2.
TestCase(2, 3, "1,5,5");
TestCase(2, 8, "4,5,5");