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improve ufuzz on destructuring (#4580)

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This commit is contained in:
Alex Lam S.L
2021-01-22 18:00:26 +00:00
committed by GitHub
parent 0358637725
commit c0614654d9
1 changed files with 33 additions and 9 deletions
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42
test/ufuzz/index.js
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@@ -431,6 +431,14 @@ function createAssignmentPairs(recurmax, stmtDepth, canThrow, nameLenBefore, was
unique_vars.length = len;
return pairs;
function mapShuffled(array, fn) {
var result = [];
for (var i = array.length; --i >= 0;) {
result.splice(rng(result.length + 1), 0, fn(array[i], i));
}
return result;
}
function convertToRest(names) {
var last = names.length - 1;
if (last >= 0 && SUPPORT.rest && rng(20) == 0) {
@@ -561,19 +569,24 @@ function createAssignmentPairs(recurmax, stmtDepth, canThrow, nameLenBefore, was
}
});
fill(function() {
var last = pairs.names.length - 1, has_rest = false;
var s = pairs.names.map(function(name, index) {
if (index in keys) return keys[index] + ": " + name;
if (index == last && SUPPORT.rest_object && rng(20) == 0 && name.indexOf("=") < 0) {
has_rest = true;
return "..." + name;
var last = pairs.names.length - 1, rest;
if (last >= 0 && !(last in keys) && SUPPORT.rest_object && rng(20) == 0) {
rest = pairs.names.pop();
if (!/=/.test(rest)) rest = "..." + rest;
}
var s = mapShuffled(pairs.names, function(name, index) {
if (index in keys) return keys[index] + ": " + name;
return rng(10) == 0 ? name : createKey(recurmax, keys) + ": " + name;
}).join(", ");
if (!has_rest) s = addTrailingComma(s);
});
if (rest) {
s.push(rest);
s = s.join(", ");
} else {
s = addTrailingComma(s.join(", "));
}
names.unshift("{ " + s + " }" + createDefaultValue(recurmax, noDefault));
}, function() {
values.unshift("{ " + addTrailingComma(pairs.values.map(function(value, index) {
values.unshift("{ " + addTrailingComma(mapShuffled(pairs.values, function(value, index) {
var key = index in keys ? keys[index] : createKey(recurmax, keys);
return key + ": " + value;
}).join(", ")) + " }");
@@ -1807,6 +1820,10 @@ function is_error_recursion(ex) {
return ex.name == "RangeError" && /Invalid string length|Maximum call stack size exceeded/.test(ex.message);
}
function is_error_destructuring(ex) {
return ex.name == "TypeError" && /^Cannot destructure /.test(ex.message);
}
function patch_try_catch(orig, toplevel) {
var stack = [ {
code: orig,
@@ -1865,6 +1882,9 @@ function patch_try_catch(orig, toplevel) {
} else if (is_error_recursion(result)) {
index = result.ufuzz_try;
return orig.slice(0, index) + 'throw new Error("skipping infinite recursion");' + orig.slice(index);
} else if (is_error_destructuring(result)) {
index = result.ufuzz_catch;
return orig.slice(0, index) + result.ufuzz_var + ' = new Error("cannot destructure");' + orig.slice(index);
}
}
stack.filled = true;
@@ -1971,6 +1991,10 @@ for (var round = 1; round <= num_iterations; round++) {
if (!ok && errored && is_error_recursion(original_result)) {
if (is_error_recursion(uglify_result) || typeof uglify_result == "string") ok = true;
}
// ignore difference in error message caused by destructuring
if (!ok && errored && is_error_destructuring(uglify_result) && is_error_destructuring(original_result)) {
ok = true;
}
// ignore errors above when caught by try-catch
if (!ok) {
var orig_skipped = patch_try_catch(original_code, toplevel);