1 files changed, 100 insertions, 0 deletions
diff --git a/js/src/fuzz-tests/util/sanitize.js b/js/src/fuzz-tests/util/sanitize.js
new file mode 100644
index 0000000000..77c5badc00
--- /dev/null
+++ b/js/src/fuzz-tests/util/sanitize.js
@@ -0,0 +1,100 @@
+/* -*- Mode: javascript; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// This function can be used to "sanitize" a new global for fuzzing in such
+// a way that permanent side-effects, hangs and behavior that could be harmful
+// to libFuzzer targets is reduced to a minimum.
+function sanitizeGlobal(g) {
+  let lfFuncs = {
+    // Noisy functions (output)
+    backtrace: function () { },
+    getBacktrace: function () { },
+    help: function () { },
+    print: function (s) { return s.toString(); },
+    printErr: function (s) { return s.toString(); },
+    putstr: function (s) { return s.toString(); },
+    stackDump: function () { },
+    dumpHeap: function () { },
+    dumpScopeChain: function () { },
+    dumpObjectWrappers: function () { },
+    dumpGCArenaInfo: function () { },
+    printProfilerEvents: function () { },
+
+    // Harmful functions (hangs, timeouts, leaks)
+    getLcovInfo: function () { },
+    readline: function () { },
+    readlineBuf: function () { },
+    timeout: function () { },
+    quit: function () { },
+    interruptIf: function () { },
+    terminate: function () { },
+    invokeInterruptCallback: function () { },
+    setInterruptCallback: function () { },
+    intern: function () { },
+    evalInWorker: function () { },
+    sleep: function () { },
+    cacheEntry: function () { },
+    streamCacheEntry: function () { },
+    createMappedArrayBuffer: function () { },
+    wasmCompileInSeparateProcess: function () { },
+    gcparam: function () { },
+    newGlobal: function () { return g; },
+
+    // Harmful functions (throw)
+    assertEq: function (a, b) { return a.toString() == b.toString(); },
+    throwError: function () { },
+    reportOutOfMemory: function () { },
+    throwOutOfMemory: function () { },
+    reportLargeAllocationFailure: function () { },
+
+    // Functions that need limiting
+    gczeal: function (m, f) { return gczeal(m, 100); },
+    startgc: function (n, o) { startgc(n > 20 ? 20 : n, o); },
+    gcslice: function (n) { gcslice(n > 20 ? 20 : n); },
+
+    // Global side-effects
+    deterministicgc: function () { },
+    fullcompartmentchecks: function () { },
+    setIonCheckGraphCoherency: function () { },
+    enableShellAllocationMetadataBuilder: function () { },
+    setTimeResolution: function () { },
+    options: function () { return "tracejit,methodjit,typeinfer"; },
+    setJitCompilerOption: function () { },
+    clearLastWarning: function () { },
+    enableSingleStepProfiling: function () { },
+    disableSingleStepProfiling: function () { },
+    enableGeckoProfiling: function () { },
+    enableGeckoProfilingWithSlowAssertions: function () { },
+    disableGeckoProfiling: function () { },
+    enqueueJob: function () { },
+    globalOfFirstJobInQueue: function () { },
+    drainJobQueue: function () { },
+    setPromiseRejectionTrackerCallback: function () { },
+    startTimingMutator: function () { },
+    stopTimingMutator: function () { },
+    setModuleLoadHook: function () { },
+    // Left enabled, as it is required for now to avoid leaks
+    //setModuleResolveHook: function() {},
+    setModuleMetadataHook: function () { },
+    setModuleDynamicImportHook: function () { },
+    finishDynamicModuleImport: function () { },
+    abortDynamicModuleImport: function () { },
+    offThreadCompileToStencil: function () { },
+    offThreadCompileModuleToStencil: function () { },
+    offThreadDecodeStencil: function () { },
+    finishOffThreadStencil: function () { },
+    addPromiseReactions: function () { },
+    ignoreUnhandledRejections: function () { },
+    enableTrackAllocations: function () { },
+    disableTrackAllocations: function () { },
+    setTestFilenameValidationCallback: function () { },
+  };
+
+  for (let lfFunc in lfFuncs) {
+    g[lfFunc] = lfFuncs[lfFunc];
+  }
+
+  return g;
+}