b3e1eb0c0d
Introduce a ReusableUnoptimizedCompileState class, passed to ParseInfo, which stores a couple of pointers and most importantly the Zone and AstValueFactory of the parse. This allows the Zone and AstValueFactory to be reused across multiple parses, rather than re-initialising per-Parse. With this, we can amend the LazyCompileDispatcher to initialise one LocalIsolate, Zone and AstValueFactory per background thread loop, rather than one per compile task, which allows us to reduce per-task costs and re-use the AstValueFactory's string table and previous String internalizations. Change-Id: Ia0e29c4e31fbe29af57674ebb10916865d38b2ce Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3313106 Reviewed-by: Toon Verwaest <verwaest@chromium.org> Commit-Queue: Leszek Swirski <leszeks@chromium.org> Cr-Commit-Position: refs/heads/main@{#78289}
104 lines
3.4 KiB
C++
104 lines
3.4 KiB
C++
// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <limits.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <cctype>
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#include <list>
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#include "include/v8-context.h"
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#include "include/v8-exception.h"
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#include "include/v8-isolate.h"
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#include "include/v8-local-handle.h"
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#include "src/objects/objects-inl.h"
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#include "src/objects/objects.h"
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#include "src/parsing/parse-info.h"
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#include "src/parsing/parsing.h"
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#include "src/parsing/preparser.h"
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#include "test/fuzzer/fuzzer-support.h"
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bool IsValidInput(const uint8_t* data, size_t size) {
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// Ignore too long inputs as they tend to find OOM or timeouts, not real bugs.
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if (size > 2048) return false;
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std::vector<char> parentheses;
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const char* ptr = reinterpret_cast<const char*>(data);
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for (size_t i = 0; i != size; ++i) {
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// Check that all characters in the data are valid.
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if (!std::isspace(ptr[i]) && !std::isprint(ptr[i])) return false;
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// Check balance of parentheses in the data.
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switch (ptr[i]) {
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case '(':
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case '[':
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case '{':
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parentheses.push_back(ptr[i]);
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break;
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case ')':
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if (parentheses.empty() || parentheses.back() != '(') return false;
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parentheses.pop_back();
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break;
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case ']':
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if (parentheses.empty() || parentheses.back() != '[') return false;
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parentheses.pop_back();
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break;
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case '}':
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if (parentheses.empty() || parentheses.back() != '{') return false;
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parentheses.pop_back();
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break;
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default:
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break;
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}
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}
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return parentheses.empty();
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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if (!IsValidInput(data, size)) {
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return 0;
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}
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v8_fuzzer::FuzzerSupport* support = v8_fuzzer::FuzzerSupport::Get();
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v8::Isolate* isolate = support->GetIsolate();
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v8::Isolate::Scope isolate_scope(isolate);
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v8::HandleScope handle_scope(isolate);
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v8::Context::Scope context_scope(support->GetContext());
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v8::TryCatch try_catch(isolate);
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v8::internal::Isolate* i_isolate =
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reinterpret_cast<v8::internal::Isolate*>(isolate);
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v8::internal::Factory* factory = i_isolate->factory();
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if (size > INT_MAX) return 0;
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v8::internal::MaybeHandle<v8::internal::String> source =
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factory->NewStringFromOneByte(
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v8::base::Vector<const uint8_t>(data, static_cast<int>(size)));
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if (source.is_null()) return 0;
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v8::internal::Handle<v8::internal::Script> script =
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factory->NewScript(source.ToHandleChecked());
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v8::internal::UnoptimizedCompileState state;
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v8::internal::ReusableUnoptimizedCompileState reusable_state(i_isolate);
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v8::internal::UnoptimizedCompileFlags flags =
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v8::internal::UnoptimizedCompileFlags::ForScriptCompile(i_isolate,
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*script);
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v8::internal::ParseInfo info(i_isolate, flags, &state, &reusable_state);
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if (!v8::internal::parsing::ParseProgram(
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&info, script, i_isolate, i::parsing::ReportStatisticsMode::kYes)) {
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info.pending_error_handler()->PrepareErrors(i_isolate,
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info.ast_value_factory());
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info.pending_error_handler()->ReportErrors(i_isolate, script);
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i_isolate->OptionalRescheduleException(true);
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}
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isolate->RequestGarbageCollectionForTesting(
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v8::Isolate::kFullGarbageCollection);
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return 0;
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}
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