JoBoEVD/UglifyJS
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

fix & improve coverage of estree (#1935)

Browse Source 
- fix `estree` conversion of getter/setter
- fix non-directive literal in `to_mozilla_ast()`
- revamp `test/mozilla-ast.js`
  - reuse `test/ufuzz.js` for code generation
  - use `acorn.parse()` for creating `estree`
- extend `test/ufuzz.js` for `acorn` workaround
  - catch variable redefinition
  - non-trivial literal as directive
  - adjust options for tolerance

Miscellaneous
- optional semi-colon when parsing directives

fixes #1914
closes #1915
This commit is contained in:
Alex Lam S.L
2017-05-15 02:37:53 +08:00
committed by GitHub
parent 504a436e9d
commit e005099fb1
7 changed files with 175 additions and 179 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
lib/mozilla-ast.js
View File

@@ -111,23 +111,19 @@
}, },
Property: function(M) { Property: function(M) {
var key = M.key; var key = M.key;
var name = key.type == "Identifier" ? key.name : key.value;
var args = { var args = {
start : my_start_token(key), start : my_start_token(key),
end : my_end_token(M.value), end : my_end_token(M.value),
key : name, key : key.type == "Identifier" ? key.name : key.value,
value : from_moz(M.value) value : from_moz(M.value)
}; };
switch (M.kind) { if (M.kind == "init") return new AST_ObjectKeyVal(args);
case "init": args.key = new AST_SymbolAccessor({
return new AST_ObjectKeyVal(args); name: args.key
case "set": });
args.value.name = from_moz(key); args.value = new AST_Accessor(args.value);
return new AST_ObjectSetter(args); if (M.kind == "get") return new AST_ObjectGetter(args);
case "get": if (M.kind == "set") return new AST_ObjectSetter(args);
args.value.name = from_moz(key);
return new AST_ObjectGetter(args);
}
}, },
ArrayExpression: function(M) { ArrayExpression: function(M) {
return new AST_Array({ return new AST_Array({
@@ -260,10 +256,7 @@
map("CallExpression", AST_Call, "callee>expression, arguments@args"); map("CallExpression", AST_Call, "callee>expression, arguments@args");
def_to_moz(AST_Toplevel, function To_Moz_Program(M) { def_to_moz(AST_Toplevel, function To_Moz_Program(M) {
return { return to_moz_scope("Program", M);
type: "Program",
body: M.body.map(to_moz)
};
}); });
def_to_moz(AST_Defun, function To_Moz_FunctionDeclaration(M) { def_to_moz(AST_Defun, function To_Moz_FunctionDeclaration(M) {
@@ -271,7 +264,7 @@
type: "FunctionDeclaration", type: "FunctionDeclaration",
id: to_moz(M.name), id: to_moz(M.name),
params: M.argnames.map(to_moz), params: M.argnames.map(to_moz),
body: to_moz_block(M) body: to_moz_scope("BlockStatement", M)
} }
}); });
@@ -280,7 +273,7 @@
type: "FunctionExpression", type: "FunctionExpression",
id: to_moz(M.name), id: to_moz(M.name),
params: M.argnames.map(to_moz), params: M.argnames.map(to_moz),
body: to_moz_block(M) body: to_moz_scope("BlockStatement", M)
} }
}); });
@@ -386,11 +379,10 @@
}); });
def_to_moz(AST_ObjectProperty, function To_Moz_Property(M) { def_to_moz(AST_ObjectProperty, function To_Moz_Property(M) {
var key = ( var key = {
is_identifier(M.key) type: "Literal",
? {type: "Identifier", name: M.key} value: M.key instanceof AST_SymbolAccessor ? M.key.name : M.key
: {type: "Literal", value: M.key} };
);
var kind; var kind;
if (M instanceof AST_ObjectKeyVal) { if (M instanceof AST_ObjectKeyVal) {
kind = "init"; kind = "init";
@@ -551,8 +543,8 @@
moz_to_me = new Function("U2", "my_start_token", "my_end_token", "from_moz", "return(" + moz_to_me + ")")( moz_to_me = new Function("U2", "my_start_token", "my_end_token", "from_moz", "return(" + moz_to_me + ")")(
exports, my_start_token, my_end_token, from_moz exports, my_start_token, my_end_token, from_moz
); );
me_to_moz = new Function("to_moz", "to_moz_block", "return(" + me_to_moz + ")")( me_to_moz = new Function("to_moz", "to_moz_block", "to_moz_scope", "return(" + me_to_moz + ")")(
to_moz, to_moz_block to_moz, to_moz_block, to_moz_scope
); );
MOZ_TO_ME[moztype] = moz_to_me; MOZ_TO_ME[moztype] = moz_to_me;
def_to_moz(mytype, me_to_moz); def_to_moz(mytype, me_to_moz);
@@ -610,4 +602,14 @@
}; };
}; };
function to_moz_scope(type, node) {
var body = node.body.map(to_moz);
if (node.body[0] instanceof AST_SimpleStatement && node.body[0].body instanceof AST_String) {
body.unshift(to_moz(new AST_EmptyStatement(node.body[0])));
}
return {
type: type,
body: body
};
};
})(); })();

20
lib/parse.js
View File

@@ -805,24 +805,20 @@ function parse($TEXT, options) {
handle_regexp(); handle_regexp();
switch (S.token.type) { switch (S.token.type) {
case "string": case "string":
var dir = false; if (S.in_directives) {
if (S.in_directives === true) { tmp = peek();
if ((is_token(peek(), "punc", ";") || peek().nlb) && S.token.raw.indexOf("\\") === -1) { if (S.token.raw.indexOf("\\") == -1
&& (tmp.nlb
|| is_token(tmp, "eof")
|| is_token(tmp, "punc", ";")
|| is_token(tmp, "punc", "}"))) {
S.input.add_directive(S.token.value); S.input.add_directive(S.token.value);
} else { } else {
S.in_directives = false; S.in_directives = false;
} }
} }
var dir = S.in_directives, stat = simple_statement(); var dir = S.in_directives, stat = simple_statement();
if (dir) { return dir ? new AST_Directive(stat.body) : stat;
return new AST_Directive({
start : stat.body.start,
end : stat.body.end,
quote : stat.body.quote,
value : stat.body.value,
});
}
return stat;
case "num": case "num":
case "regexp": case "regexp":
case "operator": case "operator":

5
package.json
View File

@@ -33,10 +33,7 @@
"source-map": "~0.5.1" "source-map": "~0.5.1"
}, },
"devDependencies": { "devDependencies": {
"acorn": "~0.6.0", "acorn": "~5.0.3",
"escodegen": "~1.3.3",
"esfuzz": "~0.3.1",
"estraverse": "~1.5.1",
"mocha": "~2.3.4" "mocha": "~2.3.4"
}, },
"optionalDependencies": { "optionalDependencies": {

16
test/mocha/directives.js
View File

@@ -351,18 +351,28 @@ describe("Directives", function() {
var tests = [ var tests = [
[ [
'"use strict";"use strict";"use strict";"use foo";"use strict";;"use sloppy";doSomething("foo");', '"use strict";"use strict";"use strict";"use foo";"use strict";;"use sloppy";doSomething("foo");',
'"use strict";"use foo";doSomething("foo");' '"use strict";"use foo";doSomething("foo");',
'function f(){ "use strict" }',
'function f(){ "use asm" }',
'function f(){ "use nondirective" }',
'function f(){ ;"use strict" }',
'function f(){ "use \n"; }',
], ],
[ [
// Nothing gets optimised in the compressor because "use asm" is the first statement // Nothing gets optimised in the compressor because "use asm" is the first statement
'"use asm";"use\\x20strict";1+1;', '"use asm";"use\\x20strict";1+1;',
'"use asm";;"use strict";1+1;' // Yet, the parser noticed that "use strict" wasn't a directive '"use asm";;"use strict";1+1;', // Yet, the parser noticed that "use strict" wasn't a directive
'function f(){"use strict"}',
'function f(){"use asm"}',
'function f(){"use nondirective"}',
'function f(){}',
'function f(){}',
] ]
]; ];
for (var i = 0; i < tests.length; i++) { for (var i = 0; i < tests.length; i++) {
assert.strictEqual( assert.strictEqual(
uglify.minify(tests[i][0], {compress: {collapse_vars: true, side_effects: true}}).code, uglify.minify(tests[i][0]).code,
tests[i][1], tests[i][1],
tests[i][0] tests[i][0]
); );

156
test/mozilla-ast.js
View File

@@ -1,103 +1,73 @@
// Testing UglifyJS <-> SpiderMonkey AST conversion // Testing UglifyJS <-> SpiderMonkey AST conversion
// through generative testing. "use strict";
var UglifyJS = require("./node"), var acorn = require("acorn");
escodegen = require("escodegen"), var ufuzz = require("./ufuzz");
esfuzz = require("esfuzz"), var UglifyJS = require("..");
estraverse = require("estraverse"),
prefix = "\r ";
// Normalizes input AST for UglifyJS in order to get correct comparison. function try_beautify(code) {
var beautified = UglifyJS.minify(code, {
function normalizeInput(ast) { compress: false,
return estraverse.replace(ast, { mangle: false,
enter: function(node, parent) { output: {
switch (node.type) { beautify: true,
// Internally mark all the properties with semi-standard type "Property". bracketize: true
case "ObjectExpression":
node.properties.forEach(function (property) {
property.type = "Property";
});
break;
// Since UglifyJS doesn"t recognize different types of property keys,
// decision on SpiderMonkey node type is based on check whether key
// can be valid identifier or not - so we do in input AST.
case "Property":
var key = node.key;
if (key.type === "Literal" && typeof key.value === "string" && UglifyJS.is_identifier(key.value)) {
node.key = {
type: "Identifier",
name: key.value
};
} else if (key.type === "Identifier" && !UglifyJS.is_identifier(key.name)) {
node.key = {
type: "Literal",
value: key.name
};
}
break;
// UglifyJS internally flattens all the expression sequences - either
// to one element (if sequence contains only one element) or flat list.
case "SequenceExpression":
node.expressions = node.expressions.reduce(function flatten(list, expr) {
return list.concat(expr.type === "SequenceExpression" ? expr.expressions.reduce(flatten, []) : [expr]);
}, []);
if (node.expressions.length === 1) {
return node.expressions[0];
}
break;
}
} }
}); });
if (beautified.error) {
console.log("// !!! beautify failed !!!");
console.log(beautified.error.stack);
console.log(code);
} else {
console.log("// (beautified)");
console.log(beautified.code);
}
} }
module.exports = function(options) { function test(original, estree, description) {
console.log("--- UglifyJS <-> Mozilla AST conversion"); var transformed = UglifyJS.minify(UglifyJS.AST_Node.from_mozilla_ast(estree), {
compress: false,
for (var counter = 0; counter < options.iterations; counter++) { mangle: false
process.stdout.write(prefix + counter + "/" + options.iterations); });
if (transformed.error || original !== transformed.code) {
var ast1 = normalizeInput(esfuzz.generate({ console.log("//=============================================================");
maxDepth: options.maxDepth console.log("// !!!!!! Failed... round", round);
})); console.log("// original code");
try_beautify(original);
var ast2 = console.log();
UglifyJS console.log();
.AST_Node console.log("//-------------------------------------------------------------");
.from_mozilla_ast(ast1) console.log("//", description);
.to_mozilla_ast(); if (transformed.error) {
console.log(transformed.error.stack);
var astPair = [ } else {
{name: 'expected', value: ast1}, try_beautify(transformed.code);
{name: 'actual', value: ast2}
];
var jsPair = astPair.map(function(item) {
return {
name: item.name,
value: escodegen.generate(item.value)
}
});
if (jsPair[0].value !== jsPair[1].value) {
var fs = require("fs");
var acorn = require("acorn");
fs.existsSync("tmp") || fs.mkdirSync("tmp");
jsPair.forEach(function (item) {
var fileName = "tmp/dump_" + item.name;
var ast = acorn.parse(item.value);
fs.writeFileSync(fileName + ".js", item.value);
fs.writeFileSync(fileName + ".json", JSON.stringify(ast, null, 2));
});
process.stdout.write("\n");
throw new Error("Got different outputs, check out tmp/dump_*.{js,json} for codes and ASTs.");
} }
console.log("!!!!!! Failed... round", round);
process.exit(1);
} }
}
process.stdout.write(prefix + "Probability of error is less than " + (100 / options.iterations) + "%, stopping.\n"); var num_iterations = ufuzz.num_iterations;
}; for (var round = 1; round <= num_iterations; round++) {
process.stdout.write(round + " of " + num_iterations + "\r");
var code = ufuzz.createTopLevelCode();
var uglified = UglifyJS.minify(code, {
compress: false,
mangle: false,
output: {
ast: true
}
});
test(uglified.code, uglified.ast.to_mozilla_ast(), "AST_Node.to_mozilla_ast()");
try {
test(uglified.code, acorn.parse(code), "acorn.parse()");
} catch (e) {
console.log("//=============================================================");
console.log("// acorn parser failed... round", round);
console.log(e);
console.log("// original code");
console.log(code);
}
}
console.log();

6
test/run-tests.js
View File

@@ -23,12 +23,6 @@ mocha_tests();
var run_sourcemaps_tests = require('./sourcemaps'); var run_sourcemaps_tests = require('./sourcemaps');
run_sourcemaps_tests(); run_sourcemaps_tests();
var run_ast_conversion_tests = require("./mozilla-ast");
run_ast_conversion_tests({
iterations: 1000
});
/* -----[ utils ]----- */ /* -----[ utils ]----- */
function tmpl() { function tmpl() {

99
test/ufuzz.js
View File

@@ -49,6 +49,8 @@ var num_iterations = +process.argv[2] || 1/0;
var verbose = false; // log every generated test var verbose = false; // log every generated test
var verbose_interval = false; // log every 100 generated tests var verbose_interval = false; // log every 100 generated tests
var use_strict = false; var use_strict = false;
var catch_redef = require.main === module;
var generate_directive = require.main === module;
for (var i = 2; i < process.argv.length; ++i) { for (var i = 2; i < process.argv.length; ++i) {
switch (process.argv[i]) { switch (process.argv[i]) {
case '-v': case '-v':
@@ -75,6 +77,12 @@ for (var i = 2; i < process.argv.length; ++i) {
STMT_SECOND_LEVEL_OVERRIDE = STMT_ARG_TO_ID[name]; STMT_SECOND_LEVEL_OVERRIDE = STMT_ARG_TO_ID[name];
if (!(STMT_SECOND_LEVEL_OVERRIDE >= 0)) throw new Error('Unknown statement name; use -? to get a list'); if (!(STMT_SECOND_LEVEL_OVERRIDE >= 0)) throw new Error('Unknown statement name; use -? to get a list');
break; break;
case '--no-catch-redef':
catch_redef = false;
break;
case '--no-directive':
generate_directive = false;
break;
case '--use-strict': case '--use-strict':
use_strict = true; use_strict = true;
break; break;
@@ -103,6 +111,8 @@ for (var i = 2; i < process.argv.length; ++i) {
console.log('-r <int>: maximum recursion depth for generator (higher takes longer)'); console.log('-r <int>: maximum recursion depth for generator (higher takes longer)');
console.log('-s1 <statement name>: force the first level statement to be this one (see list below)'); console.log('-s1 <statement name>: force the first level statement to be this one (see list below)');
console.log('-s2 <statement name>: force the second level statement to be this one (see list below)'); console.log('-s2 <statement name>: force the second level statement to be this one (see list below)');
console.log('--no-catch-redef: do not redefine catch variables');
console.log('--no-directive: do not generate directives');
console.log('--use-strict: generate "use strict"'); console.log('--use-strict: generate "use strict"');
console.log('--stmt-depth-from-func: reset statement depth counter at each function, counts from global otherwise'); console.log('--stmt-depth-from-func: reset statement depth counter at each function, counts from global otherwise');
console.log('--only-stmt <statement names>: a comma delimited white list of statements that may be generated'); console.log('--only-stmt <statement names>: a comma delimited white list of statements that may be generated');
@@ -293,6 +303,7 @@ var TYPEOF_OUTCOMES = [
'symbol', 'symbol',
'crap' ]; 'crap' ];
var unique_vars = [];
var loops = 0; var loops = 0;
var funcs = 0; var funcs = 0;
var labels = 10000; var labels = 10000;
@@ -307,6 +318,10 @@ function strictMode() {
} }
function createTopLevelCode() { function createTopLevelCode() {
VAR_NAMES.length = INITIAL_NAMES_LEN; // prune any previous names still in the list
unique_vars.length = 0;
loops = 0;
funcs = 0;
return [ return [
strictMode(), strictMode(),
'var a = 100, b = 10, c = 0;', 'var a = 100, b = 10, c = 0;',
@@ -342,33 +357,36 @@ function createArgs() {
return args.join(', '); return args.join(', ');
} }
function filterDirective(s) {
if (!generate_directive && !s[1] && /\("/.test(s[2])) s[2] = ';' + s[2];
return s;
}
function createFunction(recurmax, inGlobal, noDecl, canThrow, stmtDepth) { function createFunction(recurmax, inGlobal, noDecl, canThrow, stmtDepth) {
if (--recurmax < 0) { return ';'; } if (--recurmax < 0) { return ';'; }
if (!STMT_COUNT_FROM_GLOBAL) stmtDepth = 0; if (!STMT_COUNT_FROM_GLOBAL) stmtDepth = 0;
var func = funcs++; var func = funcs++;
var namesLenBefore = VAR_NAMES.length; var namesLenBefore = VAR_NAMES.length;
var name = (inGlobal || rng(5) > 0) ? 'f' + func : createVarName(MANDATORY, noDecl); var name;
if (name === 'a' || name === 'b' || name === 'c') name = 'f' + func; // quick hack to prevent assignment to func names of being called if (inGlobal || rng(5) > 0) name = 'f' + func;
var s = ''; else {
unique_vars.push('a', 'b', 'c');
name = createVarName(MANDATORY, noDecl);
unique_vars.length -= 3;
}
var s = [
'function ' + name + '(' + createParams() + '){',
strictMode()
];
if (rng(5) === 0) { if (rng(5) === 0) {
// functions with functions. lower the recursion to prevent a mess. // functions with functions. lower the recursion to prevent a mess.
s = [ s.push(createFunctions(rng(5) + 1, Math.ceil(recurmax * 0.7), NOT_GLOBAL, ANY_TYPE, canThrow, stmtDepth));
'function ' + name + '(' + createParams() + '){',
strictMode(),
createFunctions(rng(5) + 1, Math.ceil(recurmax * 0.7), NOT_GLOBAL, ANY_TYPE, canThrow, stmtDepth),
'}',
''
].join('\n');
} else { } else {
// functions with statements // functions with statements
s = [ s.push(createStatements(3, recurmax, canThrow, CANNOT_BREAK, CANNOT_CONTINUE, CAN_RETURN, stmtDepth));
'function ' + name + '(' + createParams() + '){',
strictMode(),
createStatements(3, recurmax, canThrow, CANNOT_BREAK, CANNOT_CONTINUE, CAN_RETURN, stmtDepth),
'}',
''
].join('\n');
} }
s.push('}', '');
s = filterDirective(s).join('\n');
VAR_NAMES.length = namesLenBefore; VAR_NAMES.length = namesLenBefore;
@@ -477,20 +495,22 @@ function createStatement(recurmax, canThrow, canBreak, canContinue, cannotReturn
case STMT_VAR: case STMT_VAR:
switch (rng(3)) { switch (rng(3)) {
case 0: case 0:
unique_vars.push('c');
var name = createVarName(MANDATORY); var name = createVarName(MANDATORY);
if (name === 'c') name = 'a'; unique_vars.pop();
return 'var ' + name + ';'; return 'var ' + name + ';';
case 1: case 1:
// initializer can only have one expression // initializer can only have one expression
unique_vars.push('c');
var name = createVarName(MANDATORY); var name = createVarName(MANDATORY);
if (name === 'c') name = 'b'; unique_vars.pop();
return 'var ' + name + ' = ' + createExpression(recurmax, NO_COMMA, stmtDepth, canThrow) + ';'; return 'var ' + name + ' = ' + createExpression(recurmax, NO_COMMA, stmtDepth, canThrow) + ';';
default: default:
// initializer can only have one expression // initializer can only have one expression
unique_vars.push('c');
var n1 = createVarName(MANDATORY); var n1 = createVarName(MANDATORY);
if (n1 === 'c') n1 = 'b';
var n2 = createVarName(MANDATORY); var n2 = createVarName(MANDATORY);
if (n2 === 'c') n2 = 'b'; unique_vars.pop();
return 'var ' + n1 + ' = ' + createExpression(recurmax, NO_COMMA, stmtDepth, canThrow) + ', ' + n2 + ' = ' + createExpression(recurmax, NO_COMMA, stmtDepth, canThrow) + ';'; return 'var ' + n1 + ' = ' + createExpression(recurmax, NO_COMMA, stmtDepth, canThrow) + ', ' + n2 + ' = ' + createExpression(recurmax, NO_COMMA, stmtDepth, canThrow) + ';';
} }
case STMT_RETURN_ETC: case STMT_RETURN_ETC:
@@ -531,8 +551,11 @@ function createStatement(recurmax, canThrow, canBreak, canContinue, cannotReturn
var nameLenBefore = VAR_NAMES.length; var nameLenBefore = VAR_NAMES.length;
var catchName = createVarName(MANDATORY); var catchName = createVarName(MANDATORY);
var freshCatchName = VAR_NAMES.length !== nameLenBefore; var freshCatchName = VAR_NAMES.length !== nameLenBefore;
if (!catch_redef) unique_vars.push(catchName);
s += ' catch (' + catchName + ') { ' + createStatements(3, recurmax, canThrow, canBreak, canContinue, cannotReturn, stmtDepth) + ' }'; s += ' catch (' + catchName + ') { ' + createStatements(3, recurmax, canThrow, canBreak, canContinue, cannotReturn, stmtDepth) + ' }';
if (freshCatchName) VAR_NAMES.splice(nameLenBefore, 1); // remove catch name // remove catch name
if (!catch_redef) unique_vars.pop();
if (freshCatchName) VAR_NAMES.splice(nameLenBefore, 1);
} }
if (n !== 0) s += ' finally { ' + createStatements(3, recurmax, canThrow, canBreak, canContinue, cannotReturn, stmtDepth) + ' }'; if (n !== 0) s += ' finally { ' + createStatements(3, recurmax, canThrow, canBreak, canContinue, cannotReturn, stmtDepth) + ' }';
return s; return s;
@@ -610,8 +633,9 @@ function _createExpression(recurmax, noComma, stmtDepth, canThrow) {
case p++: case p++:
case p++: case p++:
var nameLenBefore = VAR_NAMES.length; var nameLenBefore = VAR_NAMES.length;
unique_vars.push('c');
var name = createVarName(MAYBE); // note: this name is only accessible from _within_ the function. and immutable at that. var name = createVarName(MAYBE); // note: this name is only accessible from _within_ the function. and immutable at that.
if (name == 'c') name = 'a'; unique_vars.pop();
var s = []; var s = [];
switch (rng(5)) { switch (rng(5)) {
case 0: case 0:
@@ -663,7 +687,7 @@ function _createExpression(recurmax, noComma, stmtDepth, canThrow) {
break; break;
} }
VAR_NAMES.length = nameLenBefore; VAR_NAMES.length = nameLenBefore;
return s.join('\n'); return filterDirective(s).join('\n');
case p++: case p++:
case p++: case p++:
return createTypeofExpr(recurmax, stmtDepth, canThrow); return createTypeofExpr(recurmax, stmtDepth, canThrow);
@@ -782,7 +806,7 @@ function createAccessor(recurmax, stmtDepth, canThrow) {
createStatements(2, recurmax, canThrow, CANNOT_BREAK, CANNOT_CONTINUE, CAN_RETURN, stmtDepth), createStatements(2, recurmax, canThrow, CANNOT_BREAK, CANNOT_CONTINUE, CAN_RETURN, stmtDepth),
createStatement(recurmax, canThrow, CANNOT_BREAK, CANNOT_CONTINUE, CAN_RETURN, stmtDepth, STMT_RETURN_ETC), createStatement(recurmax, canThrow, CANNOT_BREAK, CANNOT_CONTINUE, CAN_RETURN, stmtDepth, STMT_RETURN_ETC),
'},' '},'
].join('\n'); ];
} else { } else {
var prop2; var prop2;
do { do {
@@ -794,10 +818,10 @@ function createAccessor(recurmax, stmtDepth, canThrow) {
createStatements(2, recurmax, canThrow, CANNOT_BREAK, CANNOT_CONTINUE, CAN_RETURN, stmtDepth), createStatements(2, recurmax, canThrow, CANNOT_BREAK, CANNOT_CONTINUE, CAN_RETURN, stmtDepth),
'this.' + prop2 + createAssignment() + _createBinaryExpr(recurmax, COMMA_OK, stmtDepth, canThrow) + ';', 'this.' + prop2 + createAssignment() + _createBinaryExpr(recurmax, COMMA_OK, stmtDepth, canThrow) + ';',
'},' '},'
].join('\n'); ];
} }
VAR_NAMES.length = namesLenBefore; VAR_NAMES.length = namesLenBefore;
return s; return filterDirective(s).join('\n');
} }
function createObjectLiteral(recurmax, stmtDepth, canThrow) { function createObjectLiteral(recurmax, stmtDepth, canThrow) {
@@ -899,17 +923,24 @@ function getVarName() {
function createVarName(maybe, dontStore) { function createVarName(maybe, dontStore) {
if (!maybe || rng(2)) { if (!maybe || rng(2)) {
var name = VAR_NAMES[rng(VAR_NAMES.length)];
var suffix = rng(3); var suffix = rng(3);
if (suffix) { var name;
name += '_' + suffix; do {
if (!dontStore) VAR_NAMES.push(name); name = VAR_NAMES[rng(VAR_NAMES.length)];
} if (suffix) name += '_' + suffix;
} while (unique_vars.indexOf(name) >= 0);
if (suffix && !dontStore) VAR_NAMES.push(name);
return name; return name;
} }
return ''; return '';
} }
if (require.main !== module) {
exports.createTopLevelCode = createTopLevelCode;
exports.num_iterations = num_iterations;
return;
}
function try_beautify(code, result) { function try_beautify(code, result) {
var beautified = UglifyJS.minify(code, { var beautified = UglifyJS.minify(code, {
compress: false, compress: false,
@@ -1028,10 +1059,6 @@ var uglify_code, uglify_result, ok;
for (var round = 1; round <= num_iterations; round++) { for (var round = 1; round <= num_iterations; round++) {
process.stdout.write(round + " of " + num_iterations + "\r"); process.stdout.write(round + " of " + num_iterations + "\r");
VAR_NAMES.length = INITIAL_NAMES_LEN; // prune any previous names still in the list
loops = 0;
funcs = 0;
original_code = createTopLevelCode(); original_code = createTopLevelCode();
original_result = sandbox.run_code(original_code); original_result = sandbox.run_code(original_code);
(typeof original_result != "string" ? fallback_options : minify_options).forEach(function(options) { (typeof original_result != "string" ? fallback_options : minify_options).forEach(function(options) {