v8/test/mjsunit/debug-listbreakpoints.js

// Copyright 2010 the V8 project authors. All rights reserved.
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// 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.
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//       copyright notice, this list of conditions and the following
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//
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// 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

// Note: the following tests only checks the debugger handling of the
// setexceptionbreak command.  It does not test whether the debugger
// actually breaks on exceptions or not.  That functionality is tested
// in test-debug.cc instead.

// Note: The following function g() is purposedly placed here so that
// its line numbers will not change should we add more lines of test code
// below.  The test checks for these line numbers.

function g() { // line 40
  var x = 5;
  var y = 6;
  var z = 7;
};

var first_lineno = 40; // Must be the line number of g() above.
                       // The first line of the file is line 0.

// Simple function which stores the last debug event.
listenerComplete = false;
exception = false;

var breakpoint1 = -1;
var base_request = '"seq":0,"type":"request","command":"listbreakpoints"'

function safeEval(code) {
  try {
    return eval('(' + code + ')');
  } catch (e) {
    assertEquals(void 0, e);
    return undefined;
  }
}


function clearBreakpoint(dcp, breakpoint_id) {
  var base_request = '"seq":0,"type":"request","command":"clearbreakpoint"'
  var arguments = '{"breakpoint":' + breakpoint_id + '}'
  var request = '{' + base_request + ',"arguments":' + arguments + '}'
  var json_response = dcp.processDebugJSONRequest(request);
}


function setBreakOnException(dcp, type, enabled) {
  var base_request = '"seq":0,"type":"request","command":"setexceptionbreak"'
  var arguments = '{"type":"' + type + '","enabled":' + enabled + '}'
  var request = '{' + base_request + ',"arguments":' + arguments + '}'
  var json_response = dcp.processDebugJSONRequest(request);
}


function testArguments(dcp, success, breakpoint_ids, breakpoint_linenos,
                       break_on_all, break_on_uncaught) {
  var request = '{' + base_request + '}'
  var json_response = dcp.processDebugJSONRequest(request);
  var response = safeEval(json_response);
  var num_breakpoints = breakpoint_ids.length;

  if (success) {
    assertTrue(response.success, json_response);
    assertEquals(response.body.breakpoints.length, num_breakpoints);
    if (num_breakpoints > 0) {
      var breakpoints = response.body.breakpoints;
      for (var i = 0; i < breakpoints.length; i++) {
        var id = breakpoints[i].number;
        var found = false;
        for (var j = 0; j < num_breakpoints; j++) {
          if (breakpoint_ids[j] == id) {
            assertEquals(breakpoints[i].line, breakpoint_linenos[j]);
            found = true;
            break;
          }
        }
        assertTrue(found, "found unexpected breakpoint " + id);
      }
    }
    assertEquals(response.body.breakOnExceptions, break_on_all);
    assertEquals(response.body.breakOnUncaughtExceptions, break_on_uncaught);
  } else {
    assertFalse(response.success, json_response);
  }
}


function listener(event, exec_state, event_data, data) {
  try {
  if (event == Debug.DebugEvent.Break) {
    // Get the debug command processor.
    var dcp = exec_state.debugCommandProcessor("unspecified_running_state");

    // Test with the 1 breakpoint already set:
    testArguments(dcp, true, [ breakpoint1 ], [ first_lineno ], false, false);

    setBreakOnException(dcp, "all", true);
    testArguments(dcp, true, [ breakpoint1 ], [ first_lineno ], true, false);

    setBreakOnException(dcp, "uncaught", true);
    testArguments(dcp, true, [ breakpoint1 ], [ first_lineno ], true, true);

    setBreakOnException(dcp, "all", false);
    testArguments(dcp, true, [ breakpoint1 ], [ first_lineno ], false, true);

    setBreakOnException(dcp, "uncaught", false);
    testArguments(dcp, true, [ breakpoint1 ], [ first_lineno ], false, false);

    // Clear the one breakpoint and retest:
    clearBreakpoint(dcp, breakpoint1);
    testArguments(dcp, true, [], [], false, false);

    setBreakOnException(dcp, "all", true);
    testArguments(dcp, true, [], [], true, false);

    setBreakOnException(dcp, "uncaught", true);
    testArguments(dcp, true, [], [], true, true);

    setBreakOnException(dcp, "all", false);
    testArguments(dcp, true, [], [], false, true);

    setBreakOnException(dcp, "uncaught", false);
    testArguments(dcp, true, [], [], false, false);

    // Set some more breakpoints, and clear them in various orders:
    var bp2 = Debug.setBreakPoint(g, 1, 0);
    testArguments(dcp, true, [ bp2 ],
                  [ first_lineno + 1 ],
                  false, false);

    var bp3 = Debug.setBreakPoint(g, 2, 0);
    testArguments(dcp, true, [ bp2, bp3 ],
                  [ first_lineno + 1, first_lineno + 2 ],
                  false, false);

    var bp4 = Debug.setBreakPoint(g, 3, 0);
    testArguments(dcp, true, [ bp2, bp3, bp4 ],
                  [ first_lineno + 1, first_lineno + 2, first_lineno + 3 ],
                  false, false);

    clearBreakpoint(dcp, bp3);
    testArguments(dcp, true, [ bp2, bp4 ],
                  [ first_lineno + 1, first_lineno + 3 ],
                  false, false);

    clearBreakpoint(dcp, bp4);
    testArguments(dcp, true, [ bp2 ],
                  [ first_lineno + 1 ],
                  false, false);

    var bp5 = Debug.setBreakPoint(g, 3, 0);
    testArguments(dcp, true, [ bp2, bp5 ],
                  [ first_lineno + 1, first_lineno + 3 ],
                  false, false);

    clearBreakpoint(dcp, bp2);
    testArguments(dcp, true, [ bp5 ],
                  [ first_lineno + 3 ],
                  false, false);

    clearBreakpoint(dcp, bp5);
    testArguments(dcp, true, [], [], false, false);

    // Indicate that all was processed.
    listenerComplete = true;

  }
  } catch (e) {
    exception = e
  };
};

// Add the debug event listener.
Debug.setListener(listener);

// Set a break point and call to invoke the debug event listener.
breakpoint1 = Debug.setBreakPoint(g, 0, 0);
g();

// Make sure that the debug event listener vas invoked.
assertFalse(exception, "exception in listener")
assertTrue(listenerComplete, "listener did not run to completion");