Javascript
|
2799行
|
79.49 KB
// 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.
String.prototype.startsWith = function (str) {
if (str.length > this.length)
return false;
return this.substr(0, str.length) == str;
}
function log10(num) {
return Math.log(num)/Math.log(10);
}
function ToInspectableObject(obj) {
if (!obj && typeof obj === 'object') {
return void 0;
} else {
return Object(obj);
}
}
function GetCompletions(global, last, full) {
var full_tokens = full.split();
full = full_tokens.pop();
var parts = full.split('.');
parts.pop();
var current = global;
for (var i = 0; i < parts.length; i++) {
var part = parts[i];
var next = current[part];
if (!next)
return [];
current = next;
}
var result = [];
current = ToInspectableObject(current);
while (typeof current !== 'undefined') {
var mirror = new $debug.ObjectMirror(current);
var properties = mirror.properties();
for (var i = 0; i < properties.length; i++) {
var name = properties[i].name();
if (typeof name === 'string' && name.startsWith(last))
result.push(name);
}
current = ToInspectableObject(current.__proto__);
}
return result;
}
// Global object holding debugger related constants and state.
const Debug = {};
// Debug events which can occour in the V8 JavaScript engine. These originate
// from the API include file v8-debug.h.
Debug.DebugEvent = { Break: 1,
Exception: 2,
NewFunction: 3,
BeforeCompile: 4,
AfterCompile: 5 };
// The different types of scripts matching enum ScriptType in objects.h.
Debug.ScriptType = { Native: 0,
Extension: 1,
Normal: 2 };
// The different types of script compilations matching enum
// Script::CompilationType in objects.h.
Debug.ScriptCompilationType = { Host: 0,
Eval: 1,
JSON: 2 };
// The different types of scopes matching constants runtime.cc.
Debug.ScopeType = { Global: 0,
Local: 1,
With: 2,
Closure: 3,
Catch: 4 };
// Current debug state.
const kNoFrame = -1;
Debug.State = {
currentFrame: kNoFrame,
displaySourceStartLine: -1,
displaySourceEndLine: -1,
currentSourceLine: -1
}
var trace_compile = false; // Tracing all compile events?
var trace_debug_json = false; // Tracing all debug json packets?
var last_cmd_line = '';
//var lol_is_enabled; // Set to true in d8.cc if LIVE_OBJECT_LIST is defined.
var lol_next_dump_index = 0;
const kDefaultLolLinesToPrintAtATime = 10;
const kMaxLolLinesToPrintAtATime = 1000;
var repeat_cmd_line = '';
var is_running = true;
// Copied from debug-delay.js. This is needed below:
function ScriptTypeFlag(type) {
return (1 << type);
}
// Process a debugger JSON message into a display text and a running status.
// This function returns an object with properties "text" and "running" holding
// this information.
function DebugMessageDetails(message) {
if (trace_debug_json) {
print("received: '" + message + "'");
}
// Convert the JSON string to an object.
var response = new ProtocolPackage(message);
is_running = response.running();
if (response.type() == 'event') {
return DebugEventDetails(response);
} else {
return DebugResponseDetails(response);
}
}
function DebugEventDetails(response) {
details = {text:'', running:false}
// Get the running state.
details.running = response.running();
var body = response.body();
var result = '';
switch (response.event()) {
case 'break':
if (body.breakpoints) {
result += 'breakpoint';
if (body.breakpoints.length > 1) {
result += 's';
}
result += ' #';
for (var i = 0; i < body.breakpoints.length; i++) {
if (i > 0) {
result += ', #';
}
result += body.breakpoints[i];
}
} else {
result += 'break';
}
result += ' in ';
result += body.invocationText;
result += ', ';
result += SourceInfo(body);
result += '\n';
result += SourceUnderline(body.sourceLineText, body.sourceColumn);
Debug.State.currentSourceLine = body.sourceLine;
Debug.State.displaySourceStartLine = -1;
Debug.State.displaySourceEndLine = -1;
Debug.State.currentFrame = 0;
details.text = result;
break;
case 'exception':
if (body.uncaught) {
result += 'Uncaught: ';
} else {
result += 'Exception: ';
}
result += '"';
result += body.exception.text;
result += '"';
if (body.sourceLine >= 0) {
result += ', ';
result += SourceInfo(body);
result += '\n';
result += SourceUnderline(body.sourceLineText, body.sourceColumn);
Debug.State.currentSourceLine = body.sourceLine;
Debug.State.displaySourceStartLine = -1;
Debug.State.displaySourceEndLine = -1;
Debug.State.currentFrame = 0;
} else {
result += ' (empty stack)';
Debug.State.currentSourceLine = -1;
Debug.State.displaySourceStartLine = -1;
Debug.State.displaySourceEndLine = -1;
Debug.State.currentFrame = kNoFrame;
}
details.text = result;
break;
case 'afterCompile':
if (trace_compile) {
result = 'Source ' + body.script.name + ' compiled:\n'
var source = body.script.source;
if (!(source[source.length - 1] == '\n')) {
result += source;
} else {
result += source.substring(0, source.length - 1);
}
}
details.text = result;
break;
case 'scriptCollected':
details.text = result;
break;
default:
details.text = 'Unknown debug event ' + response.event();
}
return details;
};
function SourceInfo(body) {
var result = '';
if (body.script) {
if (body.script.name) {
result += body.script.name;
} else {
result += '[unnamed]';
}
}
result += ' line ';
result += body.sourceLine + 1;
result += ' column ';
result += body.sourceColumn + 1;
return result;
}
function SourceUnderline(source_text, position) {
if (!source_text) {
return;
}
// Create an underline with a caret pointing to the source position. If the
// source contains a tab character the underline will have a tab character in
// the same place otherwise the underline will have a space character.
var underline = '';
for (var i = 0; i < position; i++) {
if (source_text[i] == '\t') {
underline += '\t';
} else {
underline += ' ';
}
}
underline += '^';
// Return the source line text with the underline beneath.
return source_text + '\n' + underline;
};
// Converts a text command to a JSON request.
function DebugCommandToJSONRequest(cmd_line) {
var result = new DebugRequest(cmd_line).JSONRequest();
if (trace_debug_json && result) {
print("sending: '" + result + "'");
}
return result;
};
function DebugRequest(cmd_line) {
// If the very first character is a { assume that a JSON request have been
// entered as a command. Converting that to a JSON request is trivial.
if (cmd_line && cmd_line.length > 0 && cmd_line.charAt(0) == '{') {
this.request_ = cmd_line;
return;
}
// Check for a simple carriage return to repeat the last command:
var is_repeating = false;
if (cmd_line == '\n') {
if (is_running) {
cmd_line = 'break'; // Not in debugger mode, break with a frame request.
} else {
cmd_line = repeat_cmd_line; // use command to repeat.
is_repeating = true;
}
}
if (!is_running) { // Only save the command if in debugger mode.
repeat_cmd_line = cmd_line; // save last command.
}
// Trim string for leading and trailing whitespace.
cmd_line = cmd_line.replace(/^\s+|\s+$/g, '');
// Find the command.
var pos = cmd_line.indexOf(' ');
var cmd;
var args;
if (pos == -1) {
cmd = cmd_line;
args = '';
} else {
cmd = cmd_line.slice(0, pos);
args = cmd_line.slice(pos).replace(/^\s+|\s+$/g, '');
}
if ((cmd === undefined) || !cmd) {
this.request_ = void 0;
return;
}
last_cmd = cmd;
// Switch on command.
switch (cmd) {
case 'continue':
case 'c':
this.request_ = this.continueCommandToJSONRequest_(args);
break;
case 'step':
case 's':
this.request_ = this.stepCommandToJSONRequest_(args, 'in');
break;
case 'stepi':
case 'si':
this.request_ = this.stepCommandToJSONRequest_(args, 'min');
break;
case 'next':
case 'n':
this.request_ = this.stepCommandToJSONRequest_(args, 'next');
break;
case 'finish':
case 'fin':
this.request_ = this.stepCommandToJSONRequest_(args, 'out');
break;
case 'backtrace':
case 'bt':
this.request_ = this.backtraceCommandToJSONRequest_(args);
break;
case 'frame':
case 'f':
this.request_ = this.frameCommandToJSONRequest_(args);
break;
case 'scopes':
this.request_ = this.scopesCommandToJSONRequest_(args);
break;
case 'scope':
this.request_ = this.scopeCommandToJSONRequest_(args);
break;
case 'disconnect':
case 'exit':
case 'quit':
this.request_ = this.disconnectCommandToJSONRequest_(args);
break;
case 'up':
this.request_ =
this.frameCommandToJSONRequest_('' +
(Debug.State.currentFrame + 1));
break;
case 'down':
case 'do':
this.request_ =
this.frameCommandToJSONRequest_('' +
(Debug.State.currentFrame - 1));
break;
case 'set':
case 'print':
case 'p':
this.request_ = this.printCommandToJSONRequest_(args);
break;
case 'dir':
this.request_ = this.dirCommandToJSONRequest_(args);
break;
case 'references':
this.request_ = this.referencesCommandToJSONRequest_(args);
break;
case 'instances':
this.request_ = this.instancesCommandToJSONRequest_(args);
break;
case 'list':
case 'l':
this.request_ = this.listCommandToJSONRequest_(args);
break;
case 'source':
this.request_ = this.sourceCommandToJSONRequest_(args);
break;
case 'scripts':
case 'script':
case 'scr':
this.request_ = this.scriptsCommandToJSONRequest_(args);
break;
case 'break':
case 'b':
this.request_ = this.breakCommandToJSONRequest_(args);
break;
case 'breakpoints':
case 'bb':
this.request_ = this.breakpointsCommandToJSONRequest_(args);
break;
case 'clear':
case 'delete':
case 'd':
this.request_ = this.clearCommandToJSONRequest_(args);
break;
case 'threads':
this.request_ = this.threadsCommandToJSONRequest_(args);
break;
case 'cond':
this.request_ = this.changeBreakpointCommandToJSONRequest_(args, 'cond');
break;
case 'enable':
case 'en':
this.request_ =
this.changeBreakpointCommandToJSONRequest_(args, 'enable');
break;
case 'disable':
case 'dis':
this.request_ =
this.changeBreakpointCommandToJSONRequest_(args, 'disable');
break;
case 'ignore':
this.request_ =
this.changeBreakpointCommandToJSONRequest_(args, 'ignore');
break;
case 'info':
case 'inf':
this.request_ = this.infoCommandToJSONRequest_(args);
break;
case 'flags':
this.request_ = this.v8FlagsToJSONRequest_(args);
break;
case 'gc':
this.request_ = this.gcToJSONRequest_(args);
break;
case 'trace':
case 'tr':
// Return undefined to indicate command handled internally (no JSON).
this.request_ = void 0;
this.traceCommand_(args);
break;
case 'help':
case '?':
this.helpCommand_(args);
// Return undefined to indicate command handled internally (no JSON).
this.request_ = void 0;
break;
case 'liveobjectlist':
case 'lol':
if (lol_is_enabled) {
this.request_ = this.lolToJSONRequest_(args, is_repeating);
break;
}
default:
throw new Error('Unknown command "' + cmd + '"');
}
}
DebugRequest.prototype.JSONRequest = function() {
return this.request_;
}
function RequestPacket(command) {
this.seq = 0;
this.type = 'request';
this.command = command;
}
RequestPacket.prototype.toJSONProtocol = function() {
// Encode the protocol header.
var json = '{';
json += '"seq":' + this.seq;
json += ',"type":"' + this.type + '"';
if (this.command) {
json += ',"command":' + StringToJSON_(this.command);
}
if (this.arguments) {
json += ',"arguments":';
// Encode the arguments part.
if (this.arguments.toJSONProtocol) {
json += this.arguments.toJSONProtocol()
} else {
json += SimpleObjectToJSON_(this.arguments);
}
}
json += '}';
return json;
}
DebugRequest.prototype.createRequest = function(command) {
return new RequestPacket(command);
};
// Note: we use detected command repetition as a signal for continuation here.
DebugRequest.prototype.createLOLRequest = function(command,
start_index,
lines_to_dump,
is_continuation) {
if (is_continuation) {
start_index = lol_next_dump_index;
}
if (lines_to_dump) {
lines_to_dump = parseInt(lines_to_dump);
} else {
lines_to_dump = kDefaultLolLinesToPrintAtATime;
}
if (lines_to_dump > kMaxLolLinesToPrintAtATime) {
lines_to_dump = kMaxLolLinesToPrintAtATime;
}
// Save the next start_index to dump from:
lol_next_dump_index = start_index + lines_to_dump;
var request = this.createRequest(command);
request.arguments = {};
request.arguments.start = start_index;
request.arguments.count = lines_to_dump;
return request;
};
// Create a JSON request for the evaluation command.
DebugRequest.prototype.makeEvaluateJSONRequest_ = function(expression) {
// Global varaible used to store whether a handle was requested.
lookup_handle = null;
if (lol_is_enabled) {
// Check if the expression is a obj id in the form @<obj id>.
var obj_id_match = expression.match(/^@([0-9]+)$/);
if (obj_id_match) {
var obj_id = parseInt(obj_id_match[1]);
// Build a dump request.
var request = this.createRequest('getobj');
request.arguments = {};
request.arguments.obj_id = obj_id;
return request.toJSONProtocol();
}
}
// Check if the expression is a handle id in the form #<handle>#.
var handle_match = expression.match(/^#([0-9]*)#$/);
if (handle_match) {
// Remember the handle requested in a global variable.
lookup_handle = parseInt(handle_match[1]);
// Build a lookup request.
var request = this.createRequest('lookup');
request.arguments = {};
request.arguments.handles = [ lookup_handle ];
return request.toJSONProtocol();
} else {
// Build an evaluate request.
var request = this.createRequest('evaluate');
request.arguments = {};
request.arguments.expression = expression;
// Request a global evaluation if there is no current frame.
if (Debug.State.currentFrame == kNoFrame) {
request.arguments.global = true;
}
return request.toJSONProtocol();
}
};
// Create a JSON request for the references/instances command.
DebugRequest.prototype.makeReferencesJSONRequest_ = function(handle, type) {
// Build a references request.
var handle_match = handle.match(/^#([0-9]*)#$/);
if (handle_match) {
var request = this.createRequest('references');
request.arguments = {};
request.arguments.type = type;
request.arguments.handle = parseInt(handle_match[1]);
return request.toJSONProtocol();
} else {
throw new Error('Invalid object id.');
}
};
// Create a JSON request for the continue command.
DebugRequest.prototype.continueCommandToJSONRequest_ = function(args) {
var request = this.createRequest('continue');
return request.toJSONProtocol();
};
// Create a JSON request for the step command.
DebugRequest.prototype.stepCommandToJSONRequest_ = function(args, type) {
// Requesting a step is through the continue command with additional
// arguments.
var request = this.createRequest('continue');
request.arguments = {};
// Process arguments if any.
// Only process args if the command is 'step' which is indicated by type being
// set to 'in'. For all other commands, ignore the args.
if (args && args.length > 0) {
args = args.split(/\s+/g);
if (args.length > 2) {
throw new Error('Invalid step arguments.');
}
if (args.length > 0) {
// Check if we have a gdb stype step command. If so, the 1st arg would
// be the step count. If it's not a number, then assume that we're
// parsing for the legacy v8 step command.
var stepcount = Number(args[0]);
if (stepcount == Number.NaN) {
// No step count at arg 1. Process as legacy d8 step command:
if (args.length == 2) {
var stepcount = parseInt(args[1]);
if (isNaN(stepcount) || stepcount <= 0) {
throw new Error('Invalid step count argument "' + args[0] + '".');
}
request.arguments.stepcount = stepcount;
}
// Get the step action.
switch (args[0]) {
case 'in':
case 'i':
request.arguments.stepaction = 'in';
break;
case 'min':
case 'm':
request.arguments.stepaction = 'min';
break;
case 'next':
case 'n':
request.arguments.stepaction = 'next';
break;
case 'out':
case 'o':
request.arguments.stepaction = 'out';
break;
default:
throw new Error('Invalid step argument "' + args[0] + '".');
}
} else {
// gdb style step commands:
request.arguments.stepaction = type;
request.arguments.stepcount = stepcount;
}
}
} else {
// Default is step of the specified type.
request.arguments.stepaction = type;
}
return request.toJSONProtocol();
};
// Create a JSON request for the backtrace command.
DebugRequest.prototype.backtraceCommandToJSONRequest_ = function(args) {
// Build a backtrace request from the text command.
var request = this.createRequest('backtrace');
// Default is to show top 10 frames.
request.arguments = {};
request.arguments.fromFrame = 0;
request.arguments.toFrame = 10;
args = args.split(/\s*[ ]+\s*/g);
if (args.length == 1 && args[0].length > 0) {
var frameCount = parseInt(args[0]);
if (frameCount > 0) {
// Show top frames.
request.arguments.fromFrame = 0;
request.arguments.toFrame = frameCount;
} else {
// Show bottom frames.
request.arguments.fromFrame = 0;
request.arguments.toFrame = -frameCount;
request.arguments.bottom = true;
}
} else if (args.length == 2) {
var fromFrame = parseInt(args[0]);
var toFrame = parseInt(args[1]);
if (isNaN(fromFrame) || fromFrame < 0) {
throw new Error('Invalid start frame argument "' + args[0] + '".');
}
if (isNaN(toFrame) || toFrame < 0) {
throw new Error('Invalid end frame argument "' + args[1] + '".');
}
if (fromFrame > toFrame) {
throw new Error('Invalid arguments start frame cannot be larger ' +
'than end frame.');
}
// Show frame range.
request.arguments.fromFrame = fromFrame;
request.arguments.toFrame = toFrame + 1;
} else if (args.length > 2) {
throw new Error('Invalid backtrace arguments.');
}
return request.toJSONProtocol();
};
// Create a JSON request for the frame command.
DebugRequest.prototype.frameCommandToJSONRequest_ = function(args) {
// Build a frame request from the text command.
var request = this.createRequest('frame');
args = args.split(/\s*[ ]+\s*/g);
if (args.length > 0 && args[0].length > 0) {
request.arguments = {};
request.arguments.number = args[0];
}
return request.toJSONProtocol();
};
// Create a JSON request for the scopes command.
DebugRequest.prototype.scopesCommandToJSONRequest_ = function(args) {
// Build a scopes request from the text command.
var request = this.createRequest('scopes');
return request.toJSONProtocol();
};
// Create a JSON request for the scope command.
DebugRequest.prototype.scopeCommandToJSONRequest_ = function(args) {
// Build a scope request from the text command.
var request = this.createRequest('scope');
args = args.split(/\s*[ ]+\s*/g);
if (args.length > 0 && args[0].length > 0) {
request.arguments = {};
request.arguments.number = args[0];
}
return request.toJSONProtocol();
};
// Create a JSON request for the print command.
DebugRequest.prototype.printCommandToJSONRequest_ = function(args) {
// Build an evaluate request from the text command.
if (args.length == 0) {
throw new Error('Missing expression.');
}
return this.makeEvaluateJSONRequest_(args);
};
// Create a JSON request for the dir command.
DebugRequest.prototype.dirCommandToJSONRequest_ = function(args) {
// Build an evaluate request from the text command.
if (args.length == 0) {
throw new Error('Missing expression.');
}
return this.makeEvaluateJSONRequest_(args);
};
// Create a JSON request for the references command.
DebugRequest.prototype.referencesCommandToJSONRequest_ = function(args) {
// Build an evaluate request from the text command.
if (args.length == 0) {
throw new Error('Missing object id.');
}
return this.makeReferencesJSONRequest_(args, 'referencedBy');
};
// Create a JSON request for the instances command.
DebugRequest.prototype.instancesCommandToJSONRequest_ = function(args) {
// Build an evaluate request from the text command.
if (args.length == 0) {
throw new Error('Missing object id.');
}
// Build a references request.
return this.makeReferencesJSONRequest_(args, 'constructedBy');
};
// Create a JSON request for the list command.
DebugRequest.prototype.listCommandToJSONRequest_ = function(args) {
// Default is ten lines starting five lines before the current location.
if (Debug.State.displaySourceEndLine == -1) {
// If we list forwards, we will start listing after the last source end
// line. Set it to start from 5 lines before the current location.
Debug.State.displaySourceEndLine = Debug.State.currentSourceLine - 5;
// If we list backwards, we will start listing backwards from the last
// source start line. Set it to start from 1 lines before the current
// location.
Debug.State.displaySourceStartLine = Debug.State.currentSourceLine + 1;
}
var from = Debug.State.displaySourceEndLine + 1;
var lines = 10;
// Parse the arguments.
args = args.split(/\s*,\s*/g);
if (args == '') {
} else if ((args.length == 1) && (args[0] == '-')) {
from = Debug.State.displaySourceStartLine - lines;
} else if (args.length == 2) {
from = parseInt(args[0]);
lines = parseInt(args[1]) - from + 1; // inclusive of the ending line.
} else {
throw new Error('Invalid list arguments.');
}
Debug.State.displaySourceStartLine = from;
Debug.State.displaySourceEndLine = from + lines - 1;
var sourceArgs = '' + from + ' ' + lines;
return this.sourceCommandToJSONRequest_(sourceArgs);
};
// Create a JSON request for the source command.
DebugRequest.prototype.sourceCommandToJSONRequest_ = function(args) {
// Build a evaluate request from the text command.
var request = this.createRequest('source');
// Default is ten lines starting five lines before the current location.
var from = Debug.State.currentSourceLine - 5;
var lines = 10;
// Parse the arguments.
args = args.split(/\s*[ ]+\s*/g);
if (args.length > 1 && args[0].length > 0 && args[1].length > 0) {
from = parseInt(args[0]) - 1;
lines = parseInt(args[1]);
} else if (args.length > 0 && args[0].length > 0) {
from = parseInt(args[0]) - 1;
}
if (from < 0) from = 0;
if (lines < 0) lines = 10;
// Request source arround current source location.
request.arguments = {};
request.arguments.fromLine = from;
request.arguments.toLine = from + lines;
return request.toJSONProtocol();
};
// Create a JSON request for the scripts command.
DebugRequest.prototype.scriptsCommandToJSONRequest_ = function(args) {
// Build a evaluate request from the text command.
var request = this.createRequest('scripts');
// Process arguments if any.
if (args && args.length > 0) {
args = args.split(/\s*[ ]+\s*/g);
if (args.length > 1) {
throw new Error('Invalid scripts arguments.');
}
request.arguments = {};
switch (args[0]) {
case 'natives':
request.arguments.types = ScriptTypeFlag(Debug.ScriptType.Native);
break;
case 'extensions':
request.arguments.types = ScriptTypeFlag(Debug.ScriptType.Extension);
break;
case 'all':
request.arguments.types =
ScriptTypeFlag(Debug.ScriptType.Normal) |
ScriptTypeFlag(Debug.ScriptType.Native) |
ScriptTypeFlag(Debug.ScriptType.Extension);
break;
default:
// If the arg is not one of the know one aboves, then it must be a
// filter used for filtering the results:
request.arguments.filter = args[0];
break;
}
}
return request.toJSONProtocol();
};
// Create a JSON request for the break command.
DebugRequest.prototype.breakCommandToJSONRequest_ = function(args) {
// Build a evaluate request from the text command.
// Process arguments if any.
if (args && args.length > 0) {
var target = args;
var type = 'function';
var line;
var column;
var condition;
var pos;
var request = this.createRequest('setbreakpoint');
// Break the args into target spec and condition if appropriate.
// Check for breakpoint condition.
pos = args.indexOf(' ');
if (pos > 0) {
target = args.substring(0, pos);
condition = args.substring(pos + 1, args.length);
}
// Check for script breakpoint (name:line[:column]). If no ':' in break
// specification it is considered a function break point.
pos = target.indexOf(':');
if (pos > 0) {
type = 'script';
var tmp = target.substring(pos + 1, target.length);
target = target.substring(0, pos);
// Check for both line and column.
pos = tmp.indexOf(':');
if (pos > 0) {
column = parseInt(tmp.substring(pos + 1, tmp.length)) - 1;
line = parseInt(tmp.substring(0, pos)) - 1;
} else {
line = parseInt(tmp) - 1;
}
} else if (target[0] == '#' && target[target.length - 1] == '#') {
type = 'handle';
target = target.substring(1, target.length - 1);
} else {
type = 'function';
}
request.arguments = {};
request.arguments.type = type;
request.arguments.target = target;
request.arguments.line = line;
request.arguments.column = column;
request.arguments.condition = condition;
} else {
var request = this.createRequest('suspend');
}
return request.toJSONProtocol();
};
DebugRequest.prototype.breakpointsCommandToJSONRequest_ = function(args) {
if (args && args.length > 0) {
throw new Error('Unexpected arguments.');
}
var request = this.createRequest('listbreakpoints');
return request.toJSONProtocol();
};
// Create a JSON request for the clear command.
DebugRequest.prototype.clearCommandToJSONRequest_ = function(args) {
// Build a evaluate request from the text command.
var request = this.createRequest('clearbreakpoint');
// Process arguments if any.
if (args && args.length > 0) {
request.arguments = {};
request.arguments.breakpoint = parseInt(args);
} else {
throw new Error('Invalid break arguments.');
}
return request.toJSONProtocol();
};
// Create a JSON request for the change breakpoint command.
DebugRequest.prototype.changeBreakpointCommandToJSONRequest_ =
function(args, command) {
var request;
// Check for exception breaks first:
// en[able] exc[eptions] [all|unc[aught]]
// en[able] [all|unc[aught]] exc[eptions]
// dis[able] exc[eptions] [all|unc[aught]]
// dis[able] [all|unc[aught]] exc[eptions]
if ((command == 'enable' || command == 'disable') &&
args && args.length > 1) {
var nextPos = args.indexOf(' ');
var arg1 = (nextPos > 0) ? args.substring(0, nextPos) : args;
var excType = null;
// Check for:
// en[able] exc[eptions] [all|unc[aught]]
// dis[able] exc[eptions] [all|unc[aught]]
if (arg1 == 'exc' || arg1 == 'exception' || arg1 == 'exceptions') {
var arg2 = (nextPos > 0) ?
args.substring(nextPos + 1, args.length) : 'all';
if (!arg2) {
arg2 = 'all'; // if unspecified, set for all.
} if (arg2 == 'unc') { // check for short cut.
arg2 = 'uncaught';
}
excType = arg2;
// Check for:
// en[able] [all|unc[aught]] exc[eptions]
// dis[able] [all|unc[aught]] exc[eptions]
} else if (arg1 == 'all' || arg1 == 'unc' || arg1 == 'uncaught') {
var arg2 = (nextPos > 0) ?
args.substring(nextPos + 1, args.length) : null;
if (arg2 == 'exc' || arg1 == 'exception' || arg1 == 'exceptions') {
excType = arg1;
if (excType == 'unc') {
excType = 'uncaught';
}
}
}
// If we matched one of the command formats, then excType will be non-null:
if (excType) {
// Build a evaluate request from the text command.
request = this.createRequest('setexceptionbreak');
request.arguments = {};
request.arguments.type = excType;
request.arguments.enabled = (command == 'enable');
return request.toJSONProtocol();
}
}
// Build a evaluate request from the text command.
request = this.createRequest('changebreakpoint');
// Process arguments if any.
if (args && args.length > 0) {
request.arguments = {};
var pos = args.indexOf(' ');
var breakpointArg = args;
var otherArgs;
if (pos > 0) {
breakpointArg = args.substring(0, pos);
otherArgs = args.substring(pos + 1, args.length);
}
request.arguments.breakpoint = parseInt(breakpointArg);
switch(command) {
case 'cond':
request.arguments.condition = otherArgs ? otherArgs : null;
break;
case 'enable':
request.arguments.enabled = true;
break;
case 'disable':
request.arguments.enabled = false;
break;
case 'ignore':
request.arguments.ignoreCount = parseInt(otherArgs);
break;
default:
throw new Error('Invalid arguments.');
}
} else {
throw new Error('Invalid arguments.');
}
return request.toJSONProtocol();
};
// Create a JSON request for the disconnect command.
DebugRequest.prototype.disconnectCommandToJSONRequest_ = function(args) {
var request;
request = this.createRequest('disconnect');
return request.toJSONProtocol();
};
// Create a JSON request for the info command.
DebugRequest.prototype.infoCommandToJSONRequest_ = function(args) {
var request;
if (args && (args == 'break' || args == 'br')) {
// Build a evaluate request from the text command.
request = this.createRequest('listbreakpoints');
last_cmd = 'info break';
} else if (args && (args == 'locals' || args == 'lo')) {
// Build a evaluate request from the text command.
request = this.createRequest('frame');
last_cmd = 'info locals';
} else if (args && (args == 'args' || args == 'ar')) {
// Build a evaluate request from the text command.
request = this.createRequest('frame');
last_cmd = 'info args';
} else if (lol_is_enabled &&
args && (args == 'liveobjectlist' || args == 'lol')) {
// Build a evaluate request from the text command.
return this.liveObjectListToJSONRequest_(null);
} else {
throw new Error('Invalid info arguments.');
}
return request.toJSONProtocol();
};
DebugRequest.prototype.v8FlagsToJSONRequest_ = function(args) {
var request;
request = this.createRequest('v8flags');
request.arguments = {};
request.arguments.flags = args;
return request.toJSONProtocol();
};
DebugRequest.prototype.gcToJSONRequest_ = function(args) {
var request;
if (!args) {
args = 'all';
}
var args = args.split(/\s+/g);
var cmd = args[0];
switch(cmd) {
case 'all':
case 'quick':
case 'full':
case 'young':
case 'old':
case 'compact':
case 'sweep':
case 'scavenge': {
if (cmd == 'young') { cmd = 'quick'; }
else if (cmd == 'old') { cmd = 'full'; }
request = this.createRequest('gc');
request.arguments = {};
request.arguments.type = cmd;
break;
}
// Else fall thru to the default case below to report the error.
default:
throw new Error('Missing arguments after ' + cmd + '.');
}
return request.toJSONProtocol();
};
// Args: [v[erbose]] [<N>] [i[ndex] <i>] [t[ype] <type>] [sp[ace] <space>]
DebugRequest.prototype.lolMakeListRequest =
function(cmd, args, first_arg_index, is_repeating) {
var request;
var start_index = 0;
var dump_limit = void 0;
var type_filter = void 0;
var space_filter = void 0;
var prop_filter = void 0;
var is_verbose = false;
var i;
for (i = first_arg_index; i < args.length; i++) {
var arg = args[i];
// Check for [v[erbose]]:
if (arg === 'verbose' || arg === 'v') {
// Nothing to do. This is already implied by args.length > 3.
is_verbose = true;
// Check for [<N>]:
} else if (arg.match(/^[0-9]+$/)) {
dump_limit = arg;
is_verbose = true;
// Check for i[ndex] <i>:
} else if (arg === 'index' || arg === 'i') {
i++;
if (args.length < i) {
throw new Error('Missing index after ' + arg + '.');
}
start_index = parseInt(args[i]);
// The user input start index starts at 1:
if (start_index <= 0) {
throw new Error('Invalid index ' + args[i] + '.');
}
start_index -= 1;
is_verbose = true;
// Check for t[ype] <type>:
} else if (arg === 'type' || arg === 't') {
i++;
if (args.length < i) {
throw new Error('Missing type after ' + arg + '.');
}
type_filter = args[i];
// Check for space <heap space name>:
} else if (arg === 'space' || arg === 'sp') {
i++;
if (args.length < i) {
throw new Error('Missing space name after ' + arg + '.');
}
space_filter = args[i];
// Check for property <prop name>:
} else if (arg === 'property' || arg === 'prop') {
i++;
if (args.length < i) {
throw new Error('Missing property name after ' + arg + '.');
}
prop_filter = args[i];
} else {
throw new Error('Unknown args at ' + arg + '.');
}
}
// Build the verbose request:
if (is_verbose) {
request = this.createLOLRequest('lol-'+cmd,
start_index,
dump_limit,
is_repeating);
request.arguments.verbose = true;
} else {
request = this.createRequest('lol-'+cmd);
request.arguments = {};
}
request.arguments.filter = {};
if (type_filter) {
request.arguments.filter.type = type_filter;
}
if (space_filter) {
request.arguments.filter.space = space_filter;
}
if (prop_filter) {
request.arguments.filter.prop = prop_filter;
}
return request;
}
function extractObjId(args) {
var id = args;
id = id.match(/^@([0-9]+)$/);
if (id) {
id = id[1];
} else {
throw new Error('Invalid obj id ' + args + '.');
}
return parseInt(id);
}
DebugRequest.prototype.lolToJSONRequest_ = function(args, is_repeating) {
var request;
// Use default command if one is not specified:
if (!args) {
args = 'info';
}
var orig_args = args;
var first_arg_index;
var arg, i;
var args = args.split(/\s+/g);
var cmd = args[0];
var id;
// Command: <id> [v[erbose]] ...
if (cmd.match(/^[0-9]+$/)) {
// Convert to the padded list command:
// Command: l[ist] <dummy> <id> [v[erbose]] ...
// Insert the implicit 'list' in front and process as normal:
cmd = 'list';
args.unshift(cmd);
}
switch(cmd) {
// Command: c[apture]
case 'capture':
case 'c':
request = this.createRequest('lol-capture');
break;
// Command: clear|d[elete] <id>|all
case 'clear':
case 'delete':
case 'del': {
if (args.length < 2) {
throw new Error('Missing argument after ' + cmd + '.');
} else if (args.length > 2) {
throw new Error('Too many arguments after ' + cmd + '.');
}
id = args[1];
if (id.match(/^[0-9]+$/)) {
// Delete a specific lol record:
request = this.createRequest('lol-delete');
request.arguments = {};
request.arguments.id = parseInt(id);
} else if (id === 'all') {
// Delete all:
request = this.createRequest('lol-reset');
} else {
throw new Error('Invalid argument after ' + cmd + '.');
}
break;
}
// Command: diff <id1> <id2> [<dump options>]
case 'diff':
first_arg_index = 3;
// Command: list <dummy> <id> [<dump options>]
case 'list':
// Command: ret[ainers] <obj id> [<dump options>]
case 'retainers':
case 'ret':
case 'retaining-paths':
case 'rp': {
if (cmd === 'ret') cmd = 'retainers';
else if (cmd === 'rp') cmd = 'retaining-paths';
if (!first_arg_index) first_arg_index = 2;
if (args.length < first_arg_index) {
throw new Error('Too few arguments after ' + cmd + '.');
}
var request_cmd = (cmd === 'list') ? 'diff':cmd;
request = this.lolMakeListRequest(request_cmd,
args,
first_arg_index,
is_repeating);
if (cmd === 'diff') {
request.arguments.id1 = parseInt(args[1]);
request.arguments.id2 = parseInt(args[2]);
} else if (cmd == 'list') {
request.arguments.id1 = 0;
request.arguments.id2 = parseInt(args[1]);
} else {
request.arguments.id = extractObjId(args[1]);
}
break;
}
// Command: getid
case 'getid': {
request = this.createRequest('lol-getid');
request.arguments = {};
request.arguments.address = args[1];
break;
}
// Command: inf[o] [<N>]
case 'info':
case 'inf': {
if (args.length > 2) {
throw new Error('Too many arguments after ' + cmd + '.');
}
// Built the info request:
request = this.createLOLRequest('lol-info', 0, args[1], is_repeating);
break;
}
// Command: path <obj id 1> <obj id 2>
case 'path': {
request = this.createRequest('lol-path');
request.arguments = {};
if (args.length > 2) {
request.arguments.id1 = extractObjId(args[1]);
request.arguments.id2 = extractObjId(args[2]);
} else {
request.arguments.id1 = 0;
request.arguments.id2 = extractObjId(args[1]);
}
break;
}
// Command: print
case 'print': {
request = this.createRequest('lol-print');
request.arguments = {};
request.arguments.id = extractObjId(args[1]);
break;
}
// Command: reset
case 'reset': {
request = this.createRequest('lol-reset');
break;
}
default:
throw new Error('Invalid arguments.');
}
return request.toJSONProtocol();
};
// Create a JSON request for the threads command.
DebugRequest.prototype.threadsCommandToJSONRequest_ = function(args) {
// Build a threads request from the text command.
var request = this.createRequest('threads');
return request.toJSONProtocol();
};
// Handle the trace command.
DebugRequest.prototype.traceCommand_ = function(args) {
// Process arguments.
if (args && args.length > 0) {
if (args == 'compile') {
trace_compile = !trace_compile;
print('Tracing of compiled scripts ' + (trace_compile ? 'on' : 'off'));
} else if (args === 'debug json' || args === 'json' || args === 'packets') {
trace_debug_json = !trace_debug_json;
print('Tracing of debug json packets ' +
(trace_debug_json ? 'on' : 'off'));
} else {
throw new Error('Invalid trace arguments.');
}
} else {
throw new Error('Invalid trace arguments.');
}
}
// Handle the help command.
DebugRequest.prototype.helpCommand_ = function(args) {
// Help os quite simple.
if (args && args.length > 0) {
print('warning: arguments to \'help\' are ignored');
}
print('Note: <> denotes symbollic values to be replaced with real values.');
print('Note: [] denotes optional parts of commands, or optional options / arguments.');
print(' e.g. d[elete] - you get the same command if you type d or delete.');
print('');
print('[break] - break as soon as possible');
print('b[reak] location [condition]');
print(' - break on named function: location is a function name');
print(' - break on function: location is #<id>#');
print(' - break on script position: location is name:line[:column]');
print('');
print('clear <breakpoint #> - deletes the specified user defined breakpoint');
print('d[elete] <breakpoint #> - deletes the specified user defined breakpoint');
print('dis[able] <breakpoint #> - disables the specified user defined breakpoint');
print('dis[able] exc[eptions] [[all] | unc[aught]]');
print(' - disables breaking on exceptions');
print('en[able] <breakpoint #> - enables the specified user defined breakpoint');
print('en[able] exc[eptions] [[all] | unc[aught]]');
print(' - enables breaking on exceptions');
print('');
print('b[ack]t[race] [n] | [-n] | [from to]');
print(' - prints the stack back trace');
print('f[rame] - prints info about the current frame context');
print('f[rame] <frame #> - set context to specified frame #');
print('scopes');
print('scope <scope #>');
print('');
print('up - set context to caller of current frame');
print('do[wn] - set context to callee of current frame');
print('inf[o] br[eak] - prints info about breakpoints in use');
print('inf[o] ar[gs] - prints info about arguments of the current function');
print('inf[o] lo[cals] - prints info about locals in the current function');
print('inf[o] liveobjectlist|lol - same as \'lol info\'');
print('');
print('step [in | next | out| min [step count]]');
print('c[ontinue] - continue executing after a breakpoint');
print('s[tep] [<N>] - step into the next N callees (default N is 1)');
print('s[tep]i [<N>] - step into the next N callees (default N is 1)');
print('n[ext] [<N>] - step over the next N callees (default N is 1)');
print('fin[ish] [<N>] - step out of N frames (default N is 1)');
print('');
print('p[rint] <expression> - prints the result of the specified expression');
print('dir <expression> - prints the object structure of the result');
print('set <var> = <expression> - executes the specified statement');
print('');
print('l[ist] - list the source code around for the current pc');
print('l[ist] [- | <start>,<end>] - list the specified range of source code');
print('source [from line [num lines]]');
print('scr[ipts] [native|extensions|all]');
print('scr[ipts] [<filter text>] - list scripts with the specified text in its description');
print('');
print('gc - runs the garbage collector');
print('');
if (lol_is_enabled) {
print('liveobjectlist|lol <command> - live object list tracking.');
print(' where <command> can be:');
print(' c[apture] - captures a LOL list.');
print(' clear|del[ete] <id>|all - clears LOL of id <id>.');
print(' If \'all\' is unspecified instead, will clear all.');
print(' diff <id1> <id2> [<dump options>]');
print(' - prints the diff between LOLs id1 and id2.');
print(' - also see <dump options> below.');
print(' getid <address> - gets the obj id for the specified address if available.');
print(' The address must be in hex form prefixed with 0x.');
print(' inf[o] [<N>] - lists summary info of all LOL lists.');
print(' If N is specified, will print N items at a time.');
print(' [l[ist]] <id> [<dump options>]');
print(' - prints the listing of objects in LOL id.');
print(' - also see <dump options> below.');
print(' reset - clears all LOL lists.');
print(' ret[ainers] <id> [<dump options>]');
print(' - prints the list of retainers of obj id.');
print(' - also see <dump options> below.');
print(' path <id1> <id2> - prints the retaining path from obj id1 to id2.');
print(' If only one id is specified, will print the path from');
print(' roots to the specified object if available.');
print(' print <id> - prints the obj for the specified obj id if available.');
print('');
print(' <dump options> includes:');
print(' [v[erbose]] - do verbose dump.');
print(' [<N>] - dump N items at a time. Implies verbose dump.');
print(' If unspecified, N will default to '+
kDefaultLolLinesToPrintAtATime+'. Max N is '+
kMaxLolLinesToPrintAtATime+'.');
print(' [i[ndex] <i>] - start dump from index i. Implies verbose dump.');
print(' [t[ype] <type>] - filter by type.');
print(' [sp[ace] <space name>] - filter by heap space where <space name> is one of');
print(' { cell, code, lo, map, new, old-data, old-pointer }.');
print('');
print(' If the verbose option, or an option that implies a verbose dump');
print(' is specified, then a verbose dump will requested. Else, a summary dump');
print(' will be requested.');
print('');
}
print('trace compile');
// hidden command: trace debug json - toggles tracing of debug json packets
print('');
print('disconnect|exit|quit - disconnects and quits the debugger');
print('help - prints this help information');
}
function formatHandleReference_(value) {
if (value.handle() >= 0) {
return '#' + value.handle() + '#';
} else {
return '#Transient#';
}
}
function formatObject_(value, include_properties) {
var result = '';
result += formatHandleReference_(value);
result += ', type: object'
result += ', constructor ';
var ctor = value.constructorFunctionValue();
result += formatHandleReference_(ctor);
result += ', __proto__ ';
var proto = value.protoObjectValue();
result += formatHandleReference_(proto);
result += ', ';
result += value.propertyCount();
result += ' properties.';
if (include_properties) {
result += '\n';
for (var i = 0; i < value.propertyCount(); i++) {
result += ' ';
result += value.propertyName(i);
result += ': ';
var property_value = value.propertyValue(i);
if (property_value instanceof ProtocolReference) {
result += '<no type>';
} else {
if (property_value && property_value.type()) {
result += property_value.type();
} else {
result += '<no type>';
}
}
result += ' ';
result += formatHandleReference_(property_value);
result += '\n';
}
}
return result;
}
function formatScope_(scope) {
var result = '';
var index = scope.index;
result += '#' + (index <= 9 ? '0' : '') + index;
result += ' ';
switch (scope.type) {
case Debug.ScopeType.Global:
result += 'Global, ';
result += '#' + scope.object.ref + '#';
break;
case Debug.ScopeType.Local:
result += 'Local';
break;
case Debug.ScopeType.With:
result += 'With, ';
result += '#' + scope.object.ref + '#';
break;
case Debug.ScopeType.Catch:
result += 'Catch, ';
result += '#' + scope.object.ref + '#';
break;
case Debug.ScopeType.Closure:
result += 'Closure';
break;
default:
result += 'UNKNOWN';
}
return result;
}
function refObjectToString_(protocolPackage, handle) {
var value = protocolPackage.lookup(handle);
var result = '';
if (value.isString()) {
result = '"' + value.value() + '"';
} else if (value.isPrimitive()) {
result = value.valueString();
} else if (value.isObject()) {
result += formatObject_(value, true);
}
return result;
}
function decodeLolCaptureResponse(body) {
var result;
result = 'Captured live object list '+ body.id +
': count '+ body.count + ' size ' + body.size;
return result;
}
function decodeLolDeleteResponse(body) {
var result;
result = 'Deleted live object list '+ body.id;
return result;
}
function digitsIn(value) {
var digits = 0;
if (value === 0) value = 1;
while (value >= 1) {
digits++;
value /= 10;
}
return digits;
}
function padding(value, max_digits) {
var padding_digits = max_digits - digitsIn(value);
var padding = '';
while (padding_digits > 0) {
padding += ' ';
padding_digits--;
}
return padding;
}
function decodeLolInfoResponse(body) {
var result;
var lists = body.lists;
var length = lists.length;
var first_index = body.first_index + 1;
var has_more = ((first_index + length) <= body.count);
result = 'captured live object lists';
if (has_more || (first_index != 1)) {
result += ' ['+ length +' of '+ body.count +
': starting from '+ first_index +']';
}
result += ':\n';
var max_digits = digitsIn(body.count);
var last_count = 0;
var last_size = 0;
for (var i = 0; i < length; i++) {
var entry = lists[i];
var count = entry.count;
var size = entry.size;
var index = first_index + i;
result += ' [' + padding(index, max_digits) + index + '] id '+ entry.id +
': count '+ count;
if (last_count > 0) {
result += '(+' + (count - last_count) + ')';
}
result += ' size '+ size;
if (last_size > 0) {
result += '(+' + (size - last_size) + ')';
}
result += '\n';
last_count = count;
last_size = size;
}
result += ' total: '+length+' lists\n';
if (has_more) {
result += ' -- press <enter> for more --\n';
} else {
repeat_cmd_line = '';
}
if (length === 0) result += ' none\n';
return result;
}
function decodeLolListResponse(body, title) {
var result;
var total_count = body.count;
var total_size = body.size;
var length;
var max_digits;
var i;
var entry;
var index;
var max_count_digits = digitsIn(total_count);
var max_size_digits;
var summary = body.summary;
if (summary) {
var roots_count = 0;
var found_root = body.found_root || 0;
var found_weak_root = body.found_weak_root || 0;
// Print the summary result:
result = 'summary of objects:\n';
length = summary.length;
if (found_root !== 0) {
roots_count++;
}
if (found_weak_root !== 0) {
roots_count++;
}
max_digits = digitsIn(length + roots_count);
max_size_digits = digitsIn(total_size);
index = 1;
if (found_root !== 0) {
result += ' [' + padding(index, max_digits) + index + '] ' +
' count '+ 1 + padding(0, max_count_digits) +
' '+ padding(0, max_size_digits+1) +
' : <root>\n';
index++;
}
if (found_weak_root !== 0) {
result += ' [' + padding(index, max_digits) + index + '] ' +
' count '+ 1 + padding(0, max_count_digits) +
' '+ padding(0, max_size_digits+1) +
' : <weak root>\n';
index++;
}
for (i = 0; i < length; i++) {
entry = summary[i];
var count = entry.count;
var size = entry.size;
result += ' [' + padding(index, max_digits) + index + '] ' +
' count '+ count + padding(count, max_count_digits) +
' size '+ size + padding(size, max_size_digits) +
' : <' + entry.desc + '>\n';
index++;
}
result += '\n total count: '+(total_count+roots_count)+'\n';
if (body.size) {
result += ' total size: '+body.size+'\n';
}
} else {
// Print the full dump result:
var first_index = body.first_index + 1;
var elements = body.elements;
length = elements.length;
var has_more = ((first_index + length) <= total_count);
result = title;
if (has_more || (first_index != 1)) {
result += ' ['+ length +' of '+ total_count +
': starting from '+ first_index +']';
}
result += ':\n';
if (length === 0) result += ' none\n';
max_digits = digitsIn(length);
var max_id = 0;
var max_size = 0;
for (i = 0; i < length; i++) {
entry = elements[i];
if (entry.id > max_id) max_id = entry.id;
if (entry.size > max_size) max_size = entry.size;
}
var max_id_digits = digitsIn(max_id);
max_size_digits = digitsIn(max_size);
for (i = 0; i < length; i++) {
entry = elements[i];
index = first_index + i;
result += ' ['+ padding(index, max_digits) + index +']';
if (entry.id !== 0) {
result += ' @' + entry.id + padding(entry.id, max_id_digits) +
': size ' + entry.size + ', ' +
padding(entry.size, max_size_digits) + entry.desc + '\n';
} else {
// Must be a root or weak root:
result += ' ' + entry.desc + '\n';
}
}
if (has_more) {
result += ' -- press <enter> for more --\n';
} else {
repeat_cmd_line = '';
}
if (length === 0) result += ' none\n';
}
return result;
}
function decodeLolDiffResponse(body) {
var title = 'objects';
return decodeLolListResponse(body, title);
}
function decodeLolRetainersResponse(body) {
var title = 'retainers for @' + body.id;
return decodeLolListResponse(body, title);
}
function decodeLolPathResponse(body) {
return body.path;
}
function decodeLolResetResponse(body) {
return 'Reset all live object lists.';
}
function decodeLolGetIdResponse(body) {
if (body.id == 0) {
return 'Address is invalid, or object has been moved or collected';
}
return 'obj id is @' + body.id;
}
function decodeLolPrintResponse(body) {
return body.dump;
}
// Rounds number 'num' to 'length' decimal places.
function roundNumber(num, length) {
var factor = Math.pow(10, length);
return Math.round(num * factor) / factor;
}
// Convert a JSON response to text for display in a text based debugger.
function DebugResponseDetails(response) {
details = {text:'', running:false}
try {
if (!response.success()) {
details.text = response.message();
return details;
}
// Get the running state.
details.running = response.running();
var body = response.body();
var result = '';
switch (response.command()) {
case 'suspend':
details.text = 'stopped';
break;
case 'setbreakpoint':
result = 'set breakpoint #';
result += body.breakpoint;
details.text = result;
break;
case 'clearbreakpoint':
result = 'cleared breakpoint #';
result += body.breakpoint;
details.text = result;
break;
case 'changebreakpoint':
result = 'successfully changed breakpoint';
details.text = result;
break;
case 'listbreakpoints':
result = 'breakpoints: (' + body.breakpoints.length + ')';
for (var i = 0; i < body.breakpoints.length; i++) {
var breakpoint = body.breakpoints[i];
result += '\n id=' + breakpoint.number;
result += ' type=' + breakpoint.type;
if (breakpoint.script_id) {
result += ' script_id=' + breakpoint.script_id;
}
if (breakpoint.script_name) {
result += ' script_name=' + breakpoint.script_name;
}
result += ' line=' + (breakpoint.line + 1);
if (breakpoint.column != null) {
result += ' column=' + (breakpoint.column + 1);
}
if (breakpoint.groupId) {
result += ' groupId=' + breakpoint.groupId;
}
if (breakpoint.ignoreCount) {
result += ' ignoreCount=' + breakpoint.ignoreCount;
}
if (breakpoint.active === false) {
result += ' inactive';
}
if (breakpoint.condition) {
result += ' condition=' + breakpoint.condition;
}
result += ' hit_count=' + breakpoint.hit_count;
}
if (body.breakpoints.length === 0) {
result = "No user defined breakpoints\n";
} else {
result += '\n';
}
if (body.breakOnExceptions) {
result += '* breaking on ALL exceptions is enabled\n';
} else if (body.breakOnUncaughtExceptions) {
result += '* breaking on UNCAUGHT exceptions is enabled\n';
} else {
result += '* all exception breakpoints are disabled\n';
}
details.text = result;
break;
case 'setexceptionbreak':
result = 'Break on ' + body.type + ' exceptions: ';
result += body.enabled ? 'enabled' : 'disabled';
details.text = result;
break;
case 'backtrace':
if (body.totalFrames == 0) {
result = '(empty stack)';
} else {
var result = 'Frames #' + body.fromFrame + ' to #' +
(body.toFrame - 1) + ' of ' + body.totalFrames + '\n';
for (i = 0; i < body.frames.length; i++) {
if (i != 0) result += '\n';
result += body.frames[i].text;
}
}
details.text = result;
break;
case 'frame':
if (last_cmd === 'info locals') {
var locals = body.locals;
if (locals.length === 0) {
result = 'No locals';
} else {
for (var i = 0; i < locals.length; i++) {
var local = locals[i];
result += local.name + ' = ';
result += refObjectToString_(response, local.value.ref);
result += '\n';
}
}
} else if (last_cmd === 'info args') {
var args = body.arguments;
if (args.length === 0) {
result = 'No arguments';
} else {
for (var i = 0; i < args.length; i++) {
var arg = args[i];
result += arg.name + ' = ';
result += refObjectToString_(response, arg.value.ref);
result += '\n';
}
}
} else {
result = SourceUnderline(body.sourceLineText,
body.column);
Debug.State.currentSourceLine = body.line;
Debug.State.currentFrame = body.index;
Debug.State.displaySourceStartLine = -1;
Debug.State.displaySourceEndLine = -1;
}
details.text = result;
break;
case 'scopes':
if (body.totalScopes == 0) {
result = '(no scopes)';
} else {
result = 'Scopes #' + body.fromScope + ' to #' +
(body.toScope - 1) + ' of ' + body.totalScopes + '\n';
for (i = 0; i < body.scopes.length; i++) {
if (i != 0) {
result += '\n';
}
result += formatScope_(body.scopes[i]);
}
}
details.text = result;
break;
case 'scope':
result += formatScope_(body);
result += '\n';
var scope_object_value = response.lookup(body.object.ref);
result += formatObject_(scope_object_value, true);
details.text = result;
break;
case 'evaluate':
case 'lookup':
case 'getobj':
if (last_cmd == 'p' || last_cmd == 'print') {
result = body.text;
} else {
var value;
if (lookup_handle) {
value = response.bodyValue(lookup_handle);
} else {
value = response.bodyValue();
}
if (value.isObject()) {
result += formatObject_(value, true);
} else {
result += 'type: ';
result += value.type();
if (!value.isUndefined() && !value.isNull()) {
result += ', ';
if (value.isString()) {
result += '"';
}
result += value.value();
if (value.isString()) {
result += '"';
}
}
result += '\n';
}
}
details.text = result;
break;
case 'references':
var count = body.length;
result += 'found ' + count + ' objects';
result += '\n';
for (var i = 0; i < count; i++) {
var value = response.bodyValue(i);
result += formatObject_(value, false);
result += '\n';
}
details.text = result;
break;
case 'source':
// Get the source from the response.
var source = body.source;
var from_line = body.fromLine + 1;
var lines = source.split('\n');
var maxdigits = 1 + Math.floor(log10(from_line + lines.length));
if (maxdigits < 3) {
maxdigits = 3;
}
var result = '';
for (var num = 0; num < lines.length; num++) {
// Check if there's an extra newline at the end.
if (num == (lines.length - 1) && lines[num].length == 0) {
break;
}
var current_line = from_line + num;
spacer = maxdigits - (1 + Math.floor(log10(current_line)));
if (current_line == Debug.State.currentSourceLine + 1) {
for (var i = 0; i < maxdigits; i++) {
result += '>';
}
result += ' ';
} else {
for (var i = 0; i < spacer; i++) {
result += ' ';
}
result += current_line + ': ';
}
result += lines[num];
result += '\n';
}
details.text = result;
break;
case 'scripts':
var result = '';
for (i = 0; i < body.length; i++) {
if (i != 0) result += '\n';
if (body[i].id) {
result += body[i].id;
} else {
result += '[no id]';
}
result += ', ';
if (body[i].name) {
result += body[i].name;
} else {
if (body[i].compilationType == Debug.ScriptCompilationType.Eval
&& body[i].evalFromScript
) {
result += 'eval from ';
var script_value = response.lookup(body[i].evalFromScript.ref);
result += ' ' + script_value.field('name');
result += ':' + (body[i].evalFromLocation.line + 1);
result += ':' + body[i].evalFromLocation.column;
} else if (body[i].compilationType ==
Debug.ScriptCompilationType.JSON) {
result += 'JSON ';
} else { // body[i].compilation == Debug.ScriptCompilationType.Host
result += '[unnamed] ';
}
}
result += ' (lines: ';
result += body[i].lineCount;
result += ', length: ';
result += body[i].sourceLength;
if (body[i].type == Debug.ScriptType.Native) {
result += ', native';
} else if (body[i].type == Debug.ScriptType.Extension) {
result += ', extension';
}
result += '), [';
var sourceStart = body[i].sourceStart;
if (sourceStart.length > 40) {
sourceStart = sourceStart.substring(0, 37) + '...';
}
result += sourceStart;
result += ']';
}
if (body.length == 0) {
result = "no matching scripts found";
}
details.text = result;
break;
case 'threads':
var result = 'Active V8 threads: ' + body.totalThreads + '\n';
body.threads.sort(function(a, b) { return a.id - b.id; });
for (i = 0; i < body.threads.length; i++) {
result += body.threads[i].current ? '*' : ' ';
result += ' ';
result += body.threads[i].id;
result += '\n';
}
details.text = result;
break;
case 'continue':
details.text = "(running)";
break;
case 'v8flags':
details.text = "flags set";
break;
case 'gc':
details.text = "GC " + body.before + " => " + body.after;
if (body.after > (1024*1024)) {
details.text +=
" (" + roundNumber(body.before/(1024*1024), 1) + "M => " +
roundNumber(body.after/(1024*1024), 1) + "M)";
} else if (body.after > 1024) {
details.text +=
" (" + roundNumber(body.before/1024, 1) + "K => " +
roundNumber(body.after/1024, 1) + "K)";
}
break;
case 'lol-capture':
details.text = decodeLolCaptureResponse(body);
break;
case 'lol-delete':
details.text = decodeLolDeleteResponse(body);
break;
case 'lol-diff':
details.text = decodeLolDiffResponse(body);
break;
case 'lol-getid':
details.text = decodeLolGetIdResponse(body);
break;
case 'lol-info':
details.text = decodeLolInfoResponse(body);
break;
case 'lol-print':
details.text = decodeLolPrintResponse(body);
break;
case 'lol-reset':
details.text = decodeLolResetResponse(body);
break;
case 'lol-retainers':
details.text = decodeLolRetainersResponse(body);
break;
case 'lol-path':
details.text = decodeLolPathResponse(body);
break;
default:
details.text =
'Response for unknown command \'' + response.command() + '\'' +
' (' + response.raw_json() + ')';
}
} catch (e) {
details.text = 'Error: "' + e + '" formatting response';
}
return details;
};
/**
* Protocol packages send from the debugger.
* @param {string} json - raw protocol packet as JSON string.
* @constructor
*/
function ProtocolPackage(json) {
this.raw_json_ = json;
this.packet_ = JSON.parse(json);
this.refs_ = [];
if (this.packet_.refs) {
for (var i = 0; i < this.packet_.refs.length; i++) {
this.refs_[this.packet_.refs[i].handle] = this.packet_.refs[i];
}
}
}
/**
* Get the packet type.
* @return {String} the packet type
*/
ProtocolPackage.prototype.type = function() {
return this.packet_.type;
}
/**
* Get the packet event.
* @return {Object} the packet event
*/
ProtocolPackage.prototype.event = function() {
return this.packet_.event;
}
/**
* Get the packet request sequence.
* @return {number} the packet request sequence
*/
ProtocolPackage.prototype.requestSeq = function() {
return this.packet_.request_seq;
}
/**
* Get the packet request sequence.
* @return {number} the packet request sequence
*/
ProtocolPackage.prototype.running = function() {
return this.packet_.running ? true : false;
}
ProtocolPackage.prototype.success = function() {
return this.packet_.success ? true : false;
}
ProtocolPackage.prototype.message = function() {
return this.packet_.message;
}
ProtocolPackage.prototype.command = function() {
return this.packet_.command;
}
ProtocolPackage.prototype.body = function() {
return this.packet_.body;
}
ProtocolPackage.prototype.bodyValue = function(index) {
if (index != null) {
return new ProtocolValue(this.packet_.body[index], this);
} else {
return new ProtocolValue(this.packet_.body, this);
}
}
ProtocolPackage.prototype.body = function() {
return this.packet_.body;
}
ProtocolPackage.prototype.lookup = function(handle) {
var value = this.refs_[handle];
if (value) {
return new ProtocolValue(value, this);
} else {
return new ProtocolReference(handle);
}
}
ProtocolPackage.prototype.raw_json = function() {
return this.raw_json_;
}
function ProtocolValue(value, packet) {
this.value_ = value;
this.packet_ = packet;
}
/**
* Get the value type.
* @return {String} the value type
*/
ProtocolValue.prototype.type = function() {
return this.value_.type;
}
/**
* Get a metadata field from a protocol value.
* @return {Object} the metadata field value
*/
ProtocolValue.prototype.field = function(name) {
return this.value_[name];
}
/**
* Check is the value is a primitive value.
* @return {boolean} true if the value is primitive
*/
ProtocolValue.prototype.isPrimitive = function() {
return this.isUndefined() || this.isNull() || this.isBoolean() ||
this.isNumber() || this.isString();
}
/**
* Get the object handle.
* @return {number} the value handle
*/
ProtocolValue.prototype.handle = function() {
return this.value_.handle;
}
/**
* Check is the value is undefined.
* @return {boolean} true if the value is undefined
*/
ProtocolValue.prototype.isUndefined = function() {
return this.value_.type == 'undefined';
}
/**
* Check is the value is null.
* @return {boolean} true if the value is null
*/
ProtocolValue.prototype.isNull = function() {
return this.value_.type == 'null';
}
/**
* Check is the value is a boolean.
* @return {boolean} true if the value is a boolean
*/
ProtocolValue.prototype.isBoolean = function() {
return this.value_.type == 'boolean';
}
/**
* Check is the value is a number.
* @return {boolean} true if the value is a number
*/
ProtocolValue.prototype.isNumber = function() {
return this.value_.type == 'number';
}
/**
* Check is the value is a string.
* @return {boolean} true if the value is a string
*/
ProtocolValue.prototype.isString = function() {
return this.value_.type == 'string';
}
/**
* Check is the value is an object.
* @return {boolean} true if the value is an object
*/
ProtocolValue.prototype.isObject = function() {
return this.value_.type == 'object' || this.value_.type == 'function' ||
this.value_.type == 'error' || this.value_.type == 'regexp';
}
/**
* Get the constructor function
* @return {ProtocolValue} constructor function
*/
ProtocolValue.prototype.constructorFunctionValue = function() {
var ctor = this.value_.constructorFunction;
return this.packet_.lookup(ctor.ref);
}
/**
* Get the __proto__ value
* @return {ProtocolValue} __proto__ value
*/
ProtocolValue.prototype.protoObjectValue = function() {
var proto = this.value_.protoObject;
return this.packet_.lookup(proto.ref);
}
/**
* Get the number og properties.
* @return {number} the number of properties
*/
ProtocolValue.prototype.propertyCount = function() {
return this.value_.properties ? this.value_.properties.length : 0;
}
/**
* Get the specified property name.
* @return {string} property name
*/
ProtocolValue.prototype.propertyName = function(index) {
var property = this.value_.properties[index];
return property.name;
}
/**
* Return index for the property name.
* @param name The property name to look for
* @return {number} index for the property name
*/
ProtocolValue.prototype.propertyIndex = function(name) {
for (var i = 0; i < this.propertyCount(); i++) {
if (this.value_.properties[i].name == name) {
return i;
}
}
return null;
}
/**
* Get the specified property value.
* @return {ProtocolValue} property value
*/
ProtocolValue.prototype.propertyValue = function(index) {
var property = this.value_.properties[index];
return this.packet_.lookup(property.ref);
}
/**
* Check is the value is a string.
* @return {boolean} true if the value is a string
*/
ProtocolValue.prototype.value = function() {
return this.value_.value;
}
ProtocolValue.prototype.valueString = function() {
return this.value_.text;
}
function ProtocolReference(handle) {
this.handle_ = handle;
}
ProtocolReference.prototype.handle = function() {
return this.handle_;
}
function MakeJSONPair_(name, value) {
return '"' + name + '":' + value;
}
function ArrayToJSONObject_(content) {
return '{' + content.join(',') + '}';
}
function ArrayToJSONArray_(content) {
return '[' + content.join(',') + ']';
}
function BooleanToJSON_(value) {
return String(value);
}
function NumberToJSON_(value) {
return String(value);
}
// Mapping of some control characters to avoid the \uXXXX syntax for most
// commonly used control cahracters.
const ctrlCharMap_ = {
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
'\f': '\\f',
'\r': '\\r',
'"' : '\\"',
'\\': '\\\\'
};
// Regular expression testing for ", \ and control characters (0x00 - 0x1F).
const ctrlCharTest_ = new RegExp('["\\\\\x00-\x1F]');
// Regular expression matching ", \ and control characters (0x00 - 0x1F)
// globally.
const ctrlCharMatch_ = new RegExp('["\\\\\x00-\x1F]', 'g');
/**
* Convert a String to its JSON representation (see http://www.json.org/). To
* avoid depending on the String object this method calls the functions in
* string.js directly and not through the value.
* @param {String} value The String value to format as JSON
* @return {string} JSON formatted String value
*/
function StringToJSON_(value) {
// Check for" , \ and control characters (0x00 - 0x1F). No need to call
// RegExpTest as ctrlchar is constructed using RegExp.
if (ctrlCharTest_.test(value)) {
// Replace ", \ and control characters (0x00 - 0x1F).
return '"' +
value.replace(ctrlCharMatch_, function (char) {
// Use charmap if possible.
var mapped = ctrlCharMap_[char];
if (mapped) return mapped;
mapped = char.charCodeAt();
// Convert control character to unicode escape sequence.
return '\\u00' +
'0' + // TODO %NumberToRadixString(Math.floor(mapped / 16), 16) +
'0' // TODO %NumberToRadixString(mapped % 16, 16);
})
+ '"';
}
// Simple string with no special characters.
return '"' + value + '"';
}
/**
* Convert a Date to ISO 8601 format. To avoid depending on the Date object
* this method calls the functions in date.js directly and not through the
* value.
* @param {Date} value The Date value to format as JSON
* @return {string} JSON formatted Date value
*/
function DateToISO8601_(value) {
function f(n) {
return n < 10 ? '0' + n : n;
}
function g(n) {
return n < 10 ? '00' + n : n < 100 ? '0' + n : n;
}
return builtins.GetUTCFullYearFrom(value) + '-' +
f(builtins.GetUTCMonthFrom(value) + 1) + '-' +
f(builtins.GetUTCDateFrom(value)) + 'T' +
f(builtins.GetUTCHoursFrom(value)) + ':' +
f(builtins.GetUTCMinutesFrom(value)) + ':' +
f(builtins.GetUTCSecondsFrom(value)) + '.' +
g(builtins.GetUTCMillisecondsFrom(value)) + 'Z';
}
/**
* Convert a Date to ISO 8601 format. To avoid depending on the Date object
* this method calls the functions in date.js directly and not through the
* value.
* @param {Date} value The Date value to format as JSON
* @return {string} JSON formatted Date value
*/
function DateToJSON_(value) {
return '"' + DateToISO8601_(value) + '"';
}
/**
* Convert an Object to its JSON representation (see http://www.json.org/).
* This implementation simply runs through all string property names and adds
* each property to the JSON representation for some predefined types. For type
* "object" the function calls itself recursively unless the object has the
* function property "toJSONProtocol" in which case that is used. This is not
* a general implementation but sufficient for the debugger. Note that circular
* structures will cause infinite recursion.
* @param {Object} object The object to format as JSON
* @return {string} JSON formatted object value
*/
function SimpleObjectToJSON_(object) {
var content = [];
for (var key in object) {
// Only consider string keys.
if (typeof key == 'string') {
var property_value = object[key];
// Format the value based on its type.
var property_value_json;
switch (typeof property_value) {
case 'object':
if (property_value === null) {
property_value_json = 'null';
} else if (typeof property_value.toJSONProtocol == 'function') {
property_value_json = property_value.toJSONProtocol(true)
} else if (property_value.constructor.name == 'Array'){
property_value_json = SimpleArrayToJSON_(property_value);
} else {
property_value_json = SimpleObjectToJSON_(property_value);
}
break;
case 'boolean':
property_value_json = BooleanToJSON_(property_value);
break;
case 'number':
property_value_json = NumberToJSON_(property_value);
break;
case 'string':
property_value_json = StringToJSON_(property_value);
break;
default:
property_value_json = null;
}
// Add the property if relevant.
if (property_value_json) {
content.push(StringToJSON_(key) + ':' + property_value_json);
}
}
}
// Make JSON object representation.
return '{' + content.join(',') + '}';
}
/**
* Convert an array to its JSON representation. This is a VERY simple
* implementation just to support what is needed for the debugger.
* @param {Array} arrya The array to format as JSON
* @return {string} JSON formatted array value
*/
function SimpleArrayToJSON_(array) {
// Make JSON array representation.
var json = '[';
for (var i = 0; i < array.length; i++) {
if (i != 0) {
json += ',';
}
var elem = array[i];
if (elem.toJSONProtocol) {
json += elem.toJSONProtocol(true)
} else if (typeof(elem) === 'object') {
json += SimpleObjectToJSON_(elem);
} else if (typeof(elem) === 'boolean') {
json += BooleanToJSON_(elem);
} else if (typeof(elem) === 'number') {
json += NumberToJSON_(elem);
} else if (typeof(elem) === 'string') {
json += StringToJSON_(elem);
} else {
json += elem;
}
}
json += ']';
return json;
}