test/mjsunit/debug-setbreakpoint.js

// 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.
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//
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// (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

// Simple function which stores the last debug event.
var listenerComplete = false;
var exception = false;
var f_script_id = 0;
var g_script_id = 0;
var h_script_id = 0;
var f_line = 0;
var g_line = 0;

var base_request = '"seq":0,"type":"request","command":"setbreakpoint"'

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

function testArguments(dcp, arguments, success, is_script) {
  var request = '{' + base_request + ',"arguments":' + arguments + '}'
  var json_response = dcp.processDebugJSONRequest(request);
  var response = safeEval(json_response);
  if (success) {
    assertTrue(response.success, request + ' -> ' + json_response);
    if (is_script) {
      assertEquals('scriptName', response.body.type, request + ' -> ' + json_response);
    } else {
      assertEquals('scriptId', response.body.type, request + ' -> ' + json_response);
    }
  } else {
    assertFalse(response.success, request + ' -> ' + json_response);
  }
  return 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 some illegal setbreakpoint requests.
    var request = '{' + base_request + '}'
    var response = safeEval(dcp.processDebugJSONRequest(request));
    assertFalse(response.success);

    var mirror;

    testArguments(dcp, '{}', false);
    testArguments(dcp, '{"type":"xx"}', false);
    testArguments(dcp, '{"type":"function"}', false);
    testArguments(dcp, '{"type":"script"}', false);
    testArguments(dcp, '{"target":"f"}', false);
    testArguments(dcp, '{"type":"xx","target":"xx"}', false);
    testArguments(dcp, '{"type":"function","target":1}', false);
    testArguments(dcp, '{"type":"function","target":"f","line":-1}', false);
    testArguments(dcp, '{"type":"function","target":"f","column":-1}', false);
    testArguments(dcp, '{"type":"handle","target":"-1"}', false);
    mirror = debug.MakeMirror(o);
    testArguments(dcp, '{"type":"handle","target":' + mirror.handle() + '}', false);

    // Test some legal setbreakpoint requests.
    testArguments(dcp, '{"type":"function","target":"f"}', true, false);
    testArguments(dcp, '{"type":"function","target":"h"}', true, false);
    testArguments(dcp, '{"type":"function","target":"f","line":1}', true, false);
    testArguments(dcp, '{"type":"function","target":"f","position":1}', true, false);
    testArguments(dcp, '{"type":"function","target":"f","condition":"i == 1"}', true, false);
    testArguments(dcp, '{"type":"function","target":"f","enabled":true}', true, false);
    testArguments(dcp, '{"type":"function","target":"f","enabled":false}', true, false);

    testArguments(dcp, '{"type":"script","target":"test"}', true, true);
    testArguments(dcp, '{"type":"script","target":"test"}', true, true);
    testArguments(dcp, '{"type":"script","target":"test","line":1}', true, true);
    testArguments(dcp, '{"type":"script","target":"test","column":1}', true, true);

    testArguments(dcp, '{"type":"scriptId","target":' + f_script_id + ',"line":' + f_line + '}', true, false);
    testArguments(dcp, '{"type":"scriptId","target":' + g_script_id + ',"line":' + g_line + '}', true, false);
    testArguments(dcp, '{"type":"scriptId","target":' + h_script_id + ',"line":' + h_line + '}', true, false);

    mirror = debug.MakeMirror(f);
    testArguments(dcp, '{"type":"handle","target":' + mirror.handle() + '}', true, false);
    mirror = debug.MakeMirror(o.a);
    testArguments(dcp, '{"type":"handle","target":' + mirror.handle() + '}', true, false);

    testArguments(dcp, '{"type":"script","target":"sourceUrlScript","line":0}', true, true);

    // Set a break point on a line with the comment, and check that actual position
    // is the next line after the comment.
    request = '{"type":"scriptId","target":' + g_script_id + ',"line":' + (g_line + 1) + '}';
    response = testArguments(dcp, request, true, false);
    assertEquals(g_line + 2, response.body.actual_locations[0].line);

    // Indicate that all was processed.
    listenerComplete = true;
  }
  } catch (e) {
    exception = e
  };
};

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

function f() {
  a=1
};

function g() {
  // Comment.
  f();
};

eval('function h(){}');
eval('function sourceUrlFunc() { a = 2; }\n//# sourceURL=sourceUrlScript');

o = {a:function(){},b:function(){}}

// Check the script ids for the test functions.
f_script_id = Debug.findScript(f).id;
g_script_id = Debug.findScript(g).id;
h_script_id = Debug.findScript(h).id;
sourceURL_script_id = Debug.findScript(sourceUrlFunc).id;

assertTrue(f_script_id > 0, "invalid script id for f");
assertTrue(g_script_id > 0, "invalid script id for g");
assertTrue(h_script_id > 0, "invalid script id for h");
assertTrue(sourceURL_script_id > 0, "invalid script id for sourceUrlFunc");
assertEquals(f_script_id, g_script_id);

// Get the source line for the test functions.
f_line = Debug.findFunctionSourceLocation(f).line;
g_line = Debug.findFunctionSourceLocation(g).line;
h_line = Debug.findFunctionSourceLocation(h).line;
assertTrue(f_line > 0, "invalid line for f");
assertTrue(g_line > 0, "invalid line for g");
assertTrue(f_line < g_line);
assertEquals(h_line, 0, "invalid line for h");

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

// Make sure that the debug event listener was invoked.
assertTrue(listenerComplete, "listener did not run to completion: " + exception);

// Try setting breakpoint by url specified in sourceURL

var breakListenerCalled = false;

function breakListener(event) {
  if (event == Debug.DebugEvent.Break)
    breakListenerCalled = true;
}

Debug.setListener(breakListener);

sourceUrlFunc();

assertTrue(breakListenerCalled, "Break listener not called on breakpoint set by sourceURL");


// Breakpoint in a script with no statements test case. If breakpoint is set
// to the script body, its actual position is taken from the nearest statement
// below or like in this case is reset to the very end of the script.
// Unless some precautions made, this position becomes out-of-range and
// we get an exception.

// Gets a script of 'i1' function and sets the breakpoint at line #4 which
// should be empty.
function SetBreakpointInI1Script() {
  var i_script = Debug.findScript(i1);
  assertTrue(!!i_script, "invalid script for i1");
  Debug.setScriptBreakPoint(Debug.ScriptBreakPointType.ScriptId,
                            i_script.id, 4);
}

// Creates the eval script and tries to set the breakpoint.
// The tricky part is that the script function must be strongly reachable at the
// moment. Since there's no way of simply getting the pointer to the function,
// we run this code while the script function is being activated on stack.
eval('SetBreakpointInI1Script()\nfunction i1(){}\n\n\n\nfunction i2(){}\n');