1a73f73b3b
The format of the name section changed recently. It now contains subsections of different type (currently for function names or local variable names). This CL changes our internal wasm module builders (in JS and C++) to emit this new format, and changes the decoder to understand it. We currently only parse the function name section, and ignore names of local variables. I will later extend this to parse local variable names when needed for debugging. R=ahaas@chromium.org, rossberg@chromium.org BUG=v8:6222 Change-Id: I2627160c25c9209a3f09abe0b88941ec48b24434 Reviewed-on: https://chromium-review.googlesource.com/470247 Commit-Queue: Clemens Hammacher <clemensh@chromium.org> Reviewed-by: Andreas Rossberg <rossberg@chromium.org> Cr-Commit-Position: refs/heads/master@{#44492}
64 lines
2.0 KiB
C++
64 lines
2.0 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 "test/fuzzer/wasm-section-fuzzers.h"
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#include "include/v8.h"
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#include "src/isolate.h"
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#include "src/objects-inl.h"
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#include "src/wasm/wasm-module-builder.h"
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#include "src/wasm/wasm-module.h"
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#include "src/zone/accounting-allocator.h"
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#include "src/zone/zone.h"
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#include "test/common/wasm/wasm-module-runner.h"
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#include "test/fuzzer/fuzzer-support.h"
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using namespace v8::internal::wasm;
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static const char* kNameString = "name";
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static const size_t kNameStringLength = 4;
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int fuzz_wasm_section(SectionCode section, const uint8_t* data, size_t size) {
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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::internal::Isolate* i_isolate =
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reinterpret_cast<v8::internal::Isolate*>(isolate);
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// Clear any pending exceptions from a prior run.
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if (i_isolate->has_pending_exception()) {
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i_isolate->clear_pending_exception();
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}
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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::AccountingAllocator allocator;
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v8::internal::Zone zone(&allocator, ZONE_NAME);
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ZoneBuffer buffer(&zone);
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buffer.write_u32(kWasmMagic);
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buffer.write_u32(kWasmVersion);
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if (section == kNameSectionCode) {
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buffer.write_u8(kUnknownSectionCode);
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buffer.write_size(size + kNameStringLength + 1);
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buffer.write_u8(kNameStringLength);
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buffer.write(reinterpret_cast<const uint8_t*>(kNameString),
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kNameStringLength);
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buffer.write(data, size);
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} else {
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buffer.write_u8(section);
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buffer.write_size(size);
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buffer.write(data, size);
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}
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ErrorThrower thrower(i_isolate, "decoder");
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std::unique_ptr<const WasmModule> module(testing::DecodeWasmModuleForTesting(
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i_isolate, &thrower, buffer.begin(), buffer.end(), kWasmOrigin));
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return 0;
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}
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