| // 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) { |
| // Ignore too long inputs as they tend to find OOM or timeouts, not real bugs. |
| if (size > 2048) { |
| return false; |
| } |
| |
| 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(i_isolate, script); |
| if (!v8::internal::parsing::ParseProgram(&info, i_isolate)) { |
| i_isolate->OptionalRescheduleException(true); |
| } |
| isolate->RequestGarbageCollectionForTesting( |
| v8::Isolate::kFullGarbageCollection); |
| return 0; |
| } |