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improve sandbox fidelity (#3415)

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This commit is contained in:
Alex Lam S.L
2019-05-15 23:26:57 +08:00
committed by GitHub
parent 1f0def10eb
commit a21c348d93
7 changed files with 167 additions and 84 deletions
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17
test/sandbox.js
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@@ -52,32 +52,19 @@ function createContext() {
return ctx;
}
var context;
exports.run_code = function(code, reuse) {
exports.run_code = function(code, toplevel) {
var stdout = "";
var original_write = process.stdout.write;
process.stdout.write = function(chunk) {
stdout += chunk;
};
try {
if (!reuse || !context) context = createContext();
vm.runInContext([
"!function() {",
code,
"}();",
].join("\n"), context, { timeout: 5000 });
vm.runInContext(toplevel ? "(function(){" + code + "})()" : code, createContext(), { timeout: 5000 });
return stdout;
} catch (ex) {
return ex;
} finally {
process.stdout.write = original_write;
if (!reuse || code.indexOf(".prototype") >= 0) {
context = null;
} else {
vm.runInContext(Object.keys(context).map(function(name) {
return "delete " + name;
}).join("\n"), context);
}
}
};