// Copyright 2016 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include <limits.h> #include <stddef.h> #include <stdint.h> #include <cctype> #include <list> #include "include/v8.h" #include "src/objects-inl.h" #include "src/objects.h" #include "src/parsing/parse-info.h" #include "src/parsing/parsing.h" #include "src/parsing/preparser.h" #include "test/fuzzer/fuzzer-support.h" bool IsValidInput(const uint8_t* data, size_t size) { std::list<char> parentheses; const char* ptr = reinterpret_cast<const char*>(data); for (size_t i = 0; i != size; ++i) { // Check that all characters in the data are valid. if (!(std::isspace(ptr[i]) || std::isprint(ptr[i]))) { return false; } // Check balance of parentheses in the data. switch (ptr[i]) { case '(': case '[': case '{': parentheses.push_back(ptr[i]); break; case ')': if (parentheses.back() != '(') return false; parentheses.pop_back(); break; case ']': if (parentheses.back() != '[') return false; parentheses.pop_back(); break; case '}': if (parentheses.back() != '{') return false; parentheses.pop_back(); break; default: break; } } return parentheses.empty(); } extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { if (!IsValidInput(data, size)) { return 0; } v8_fuzzer::FuzzerSupport* support = v8_fuzzer::FuzzerSupport::Get(); v8::Isolate* isolate = support->GetIsolate(); v8::Isolate::Scope isolate_scope(isolate); v8::HandleScope handle_scope(isolate); v8::Context::Scope context_scope(support->GetContext()); v8::TryCatch try_catch(isolate); v8::internal::Isolate* i_isolate = reinterpret_cast<v8::internal::Isolate*>(isolate); v8::internal::Factory* factory = i_isolate->factory(); if (size > INT_MAX) return 0; v8::internal::MaybeHandle<v8::internal::String> source = factory->NewStringFromOneByte( v8::internal::Vector<const uint8_t>(data, static_cast<int>(size))); if (source.is_null()) return 0; v8::internal::Handle<v8::internal::Script> script = factory->NewScript(source.ToHandleChecked()); v8::internal::ParseInfo info(script); if (!v8::internal::parsing::ParseProgram(&info, i_isolate)) { i_isolate->OptionalRescheduleException(true); } isolate->RequestGarbageCollectionForTesting( v8::Isolate::kFullGarbageCollection); return 0; }