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fix corner cases in varify (#4719)

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This commit is contained in:
Alex Lam S.L
2021-03-02 15:33:58 +00:00
committed by GitHub
parent b1e05fd48a
commit adcafce048
3 changed files with 115 additions and 15 deletions
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23
test/ufuzz/index.js
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@@ -919,6 +919,12 @@ function getLabel(label) {
return label && " L" + label;
}
function declareVarName(name, no_var) {
if (!SUPPORT.let || !no_var && rng(10)) return "var ";
block_vars.push(name);
return rng(2) ? "let " : "const ";
}
function createStatement(recurmax, canThrow, canBreak, canContinue, cannotReturn, stmtDepth, target) {
++stmtDepth;
var loop = ++loops;
@@ -955,6 +961,8 @@ function createStatement(recurmax, canThrow, canBreak, canContinue, cannotReturn
canContinue = label.continue || enableLoopControl(canContinue, CAN_CONTINUE);
return label.target + "for (var brake" + loop + " = 5; " + createExpression(recurmax, COMMA_OK, stmtDepth, canThrow) + " && brake" + loop + " > 0; --brake" + loop + ")" + createStatement(recurmax, canThrow, canBreak, canContinue, cannotReturn, stmtDepth);
case STMT_FOR_ENUM:
var block_len = block_vars.length;
var nameLenBefore = VAR_NAMES.length;
var label = createLabel(canBreak, canContinue);
canBreak = label.break || enableLoopControl(canBreak, CAN_BREAK);
canContinue = label.continue || enableLoopControl(canContinue, CAN_CONTINUE);
@@ -963,12 +971,8 @@ function createStatement(recurmax, canThrow, canBreak, canContinue, cannotReturn
var init = "";
if (!/^key/.test(key)) {
if (!(of && bug_for_of_var) && rng(10) == 0) init = "var ";
} else if (!SUPPORT.let || !(of && bug_for_of_var) && rng(10)) {
init = "var ";
} else if (rng(2)) {
init = "let ";
} else {
init = "const ";
init = declareVarName(key, of && bug_for_of_var);
}
if (!SUPPORT.destructuring || of && !(canThrow && rng(20) == 0) || rng(10)) {
init += key;
@@ -1003,8 +1007,15 @@ function createStatement(recurmax, canThrow, canBreak, canContinue, cannotReturn
s += createExpression(recurmax, COMMA_OK, stmtDepth, canThrow) + "; ";
s += label.target + " for (" + init + " in expr" + loop + ") {";
}
if (rng(3)) s += "c = 1 + c; var " + createVarName(MANDATORY) + " = expr" + loop + "[" + key + "]; ";
if (/^key/.test(key)) VAR_NAMES.push(key);
if (rng(3)) {
s += "c = 1 + c; ";
var name = createVarName(MANDATORY);
s += declareVarName(name) + name + " = expr" + loop + "[" + key + "]; ";
}
s += createStatement(recurmax, canThrow, canBreak, canContinue, cannotReturn, stmtDepth) + "}";
VAR_NAMES.length = nameLenBefore;
block_vars.length = block_len;
return "{" + s + "}";
case STMT_SEMI:
return use_strict && rng(20) === 0 ? '"use strict";' : ";";