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fix corner cases in infinite recursion detection (#3924)

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This commit is contained in:
Alex Lam S.L
2020-05-25 15:54:57 +01:00
committed by GitHub
parent 2c4d7d66ef
commit 27bdcbbd83
1 changed files with 3 additions and 3 deletions
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6
test/ufuzz/index.js
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@@ -1177,19 +1177,19 @@ function skip_infinite_recursion(orig, toplevel) {
var code = orig; var code = orig;
var tries = []; var tries = [];
var offset = 0; var offset = 0;
var re = /(?:(?:^|[\s{};])try|}\s*catch\s*\(([^)]+)\)|}\s*finally)\s*(?={)/g; var re = /(?:(?:^|[\s{});])try|}\s*catch\s*\(([^)]+)\)|}\s*finally)\s*(?={)/g;
var match; var match;
while (match = re.exec(code)) { while (match = re.exec(code)) {
if (/}\s*finally\s*$/.test(match[0])) { if (/}\s*finally\s*$/.test(match[0])) {
tries.shift(); tries.shift();
continue; continue;
} }
if (tries.length && tries[0].catch) tries.shift();
var index = match.index + match[0].length + 1; var index = match.index + match[0].length + 1;
if (/(?:^|[\s{};])try\s*$/.test(match[0])) { if (/(?:^|[\s{});])try\s*$/.test(match[0])) {
tries.unshift({ try: index - offset }); tries.unshift({ try: index - offset });
continue; continue;
} }
while (tries.length && tries[0].catch) tries.shift();
tries[0].catch = index; tries[0].catch = index;
var insert = "throw " + match[1] + ".ufuzz_skip || (" + match[1] + ".ufuzz_skip = " + tries[0].try + "), " + match[1] + ";"; var insert = "throw " + match[1] + ".ufuzz_skip || (" + match[1] + ".ufuzz_skip = " + tries[0].try + "), " + match[1] + ";";
var new_code = code.slice(0, index) + insert + code.slice(index); var new_code = code.slice(0, index) + insert + code.slice(index);