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/* * Copyright 2016 WebAssembly Community Group participants * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "wabt/binary-reader.h" #include <cassert> #include <cinttypes> #include <cstdarg> #include <cstdint> #include <cstdio> #include <cstring> #include <stack> #include <vector> #include "wabt/config.h" #include "wabt/binary-reader-logging.h" #include "wabt/binary.h" #include "wabt/leb128.h" #include "wabt/stream.h" #include "wabt/utf8.h" #if HAVE_ALLOCA #include <alloca.h> #endif #define ERROR_IF(expr, ...) \ do { \ if (expr) { \ PrintError(__VA_ARGS__); \ return Result::Error; \ } \ } while (0) #define ERROR_UNLESS(expr, ...) ERROR_IF(!(expr), __VA_ARGS__) #define ERROR_UNLESS_OPCODE_ENABLED(opcode) \ do { \ if (!opcode.IsEnabled(options_.features)) { \ return ReportUnexpectedOpcode(opcode); \ } \ } while (0) #define CALLBACK0(member) \ ERROR_UNLESS(Succeeded(delegate_->member()), #member " callback failed") #define CALLBACK(member, ...) \ ERROR_UNLESS(Succeeded(delegate_->member(__VA_ARGS__)), \ #member " callback failed") namespace wabt { namespace { class BinaryReader { public: struct ReadModuleOptions { bool stop_on_first_error; }; BinaryReader(const void* data, size_t size, BinaryReaderDelegate* delegate, const ReadBinaryOptions& options); Result ReadModule(const ReadModuleOptions& options); private: template <typename T, T BinaryReader::*member> struct ValueRestoreGuard { explicit ValueRestoreGuard(BinaryReader* this_) : this_(this_), previous_value_(this_->*member) {} ~ValueRestoreGuard() { this_->*member = previous_value_; } BinaryReader* this_; T previous_value_; }; struct ReadSectionsOptions { bool stop_on_first_error; }; void WABT_PRINTF_FORMAT(2, 3) PrintError(const char* format, ...); [[nodiscard]] Result ReadOpcode(Opcode* out_value, const char* desc); template <typename T> [[nodiscard]] Result ReadT(T* out_value, const char* type_name, const char* desc); [[nodiscard]] Result ReadU8(uint8_t* out_value, const char* desc); [[nodiscard]] Result ReadU32(uint32_t* out_value, const char* desc); [[nodiscard]] Result ReadF32(uint32_t* out_value, const char* desc); [[nodiscard]] Result ReadF64(uint64_t* out_value, const char* desc); [[nodiscard]] Result ReadV128(v128* out_value, const char* desc); [[nodiscard]] Result ReadU32Leb128(uint32_t* out_value, const char* desc); [[nodiscard]] Result ReadU64Leb128(uint64_t* out_value, const char* desc); [[nodiscard]] Result ReadS32Leb128(uint32_t* out_value, const char* desc); [[nodiscard]] Result ReadS64Leb128(uint64_t* out_value, const char* desc); [[nodiscard]] Result ReadType(Type* out_value, const char* desc); [[nodiscard]] Result ReadRefType(Type* out_value, const char* desc); [[nodiscard]] Result ReadExternalKind(ExternalKind* out_value, const char* desc); [[nodiscard]] Result ReadStr(std::string_view* out_str, const char* desc); [[nodiscard]] Result ReadBytes(const void** out_data, Address* out_data_size, const char* desc); [[nodiscard]] Result ReadBytesWithSize(const void** out_data, Offset size, const char* desc); [[nodiscard]] Result ReadIndex(Index* index, const char* desc); [[nodiscard]] Result ReadOffset(Offset* offset, const char* desc); [[nodiscard]] Result ReadAlignment(Address* align_log2, const char* desc); [[nodiscard]] Result CheckAlignment(Address* align_log2, const char* desc); [[nodiscard]] Result TakeHasMemidx(Address* align_log2, bool* has_memidx); [[nodiscard]] Result ReadMemidx(Index* memidx, const char* desc); [[nodiscard]] Result ReadMemLocation(Address* alignment_log2, Index* memidx, Address* offset, const char* desc_align, const char* desc_memidx, const char* desc_offset, uint8_t* lane_val = nullptr); [[nodiscard]] Result CallbackMemLocation(const Address* alignment_log2, const Index* memidx, const Address* offset, const uint8_t* lane_val = nullptr); [[nodiscard]] Result ReadCount(Index* index, const char* desc); [[nodiscard]] Result ReadField(TypeMut* out_value); bool IsConcreteType(Type); bool IsBlockType(Type); Index NumTotalFuncs(); [[nodiscard]] Result ReadInitExpr(Index index); [[nodiscard]] Result ReadTable(Type* out_elem_type, Limits* out_elem_limits); [[nodiscard]] Result ReadMemory(Limits* out_page_limits, uint32_t* out_page_size); [[nodiscard]] Result ReadGlobalHeader(Type* out_type, bool* out_mutable); [[nodiscard]] Result ReadTagType(Index* out_sig_index); [[nodiscard]] Result ReadAddress(Address* out_value, Index memory, const char* desc); [[nodiscard]] Result ReadFunctionBody(Offset end_offset); // ReadInstructions reads until end_offset or the nesting depth reaches zero. [[nodiscard]] Result ReadInstructions(Offset end_offset, const char* context); [[nodiscard]] Result ReadNameSection(Offset section_size); [[nodiscard]] Result ReadRelocSection(Offset section_size); [[nodiscard]] Result ReadDylinkSection(Offset section_size); [[nodiscard]] Result ReadGenericCustomSection(std::string_view name, Offset section_size); [[nodiscard]] Result ReadDylink0Section(Offset section_size); [[nodiscard]] Result ReadTargetFeaturesSections(Offset section_size); [[nodiscard]] Result ReadLinkingSection(Offset section_size); [[nodiscard]] Result ReadCodeMetadataSection(std::string_view name, Offset section_size); [[nodiscard]] Result ReadCustomSection(Index section_index, Offset section_size); [[nodiscard]] Result ReadTypeSection(Offset section_size); [[nodiscard]] Result ReadImportSection(Offset section_size); [[nodiscard]] Result ReadFunctionSection(Offset section_size); [[nodiscard]] Result ReadTableSection(Offset section_size); [[nodiscard]] Result ReadMemorySection(Offset section_size); [[nodiscard]] Result ReadGlobalSection(Offset section_size); [[nodiscard]] Result ReadExportSection(Offset section_size); [[nodiscard]] Result ReadStartSection(Offset section_size); [[nodiscard]] Result ReadElemSection(Offset section_size); [[nodiscard]] Result ReadCodeSection(Offset section_size); [[nodiscard]] Result ReadDataSection(Offset section_size); [[nodiscard]] Result ReadDataCountSection(Offset section_size); [[nodiscard]] Result ReadTagSection(Offset section_size); [[nodiscard]] Result ReadSections(const ReadSectionsOptions& options); Result ReportUnexpectedOpcode(Opcode opcode, const char* message = nullptr); size_t read_end_ = 0; // Either the section end or data_size. BinaryReaderDelegate::State state_; BinaryReaderLogging logging_delegate_; BinaryReaderDelegate* delegate_ = nullptr; TypeVector param_types_; TypeVector result_types_; TypeMutVector fields_; std::vector<Index> target_depths_; const ReadBinaryOptions& options_; BinarySection last_known_section_ = BinarySection::Invalid; bool did_read_names_section_ = false; bool reading_custom_section_ = false; Index num_func_imports_ = 0; Index num_table_imports_ = 0; Index num_memory_imports_ = 0; Index num_global_imports_ = 0; Index num_tag_imports_ = 0; Index num_function_signatures_ = 0; Index num_function_bodies_ = 0; Index num_data_segments_ = 0; Index data_count_ = kInvalidIndex; using ReadEndRestoreGuard = ValueRestoreGuard<size_t, &BinaryReader::read_end_>; }; BinaryReader::BinaryReader(const void* data, size_t size, BinaryReaderDelegate* delegate, const ReadBinaryOptions& options) : read_end_(size), state_(static_cast<const uint8_t*>(data), size), logging_delegate_(options.log_stream, delegate), delegate_(options.log_stream ? &logging_delegate_ : delegate), options_(options), last_known_section_(BinarySection::Invalid) { delegate->OnSetState(&state_); } void WABT_PRINTF_FORMAT(2, 3) BinaryReader::PrintError(const char* format, ...) { ErrorLevel error_level = reading_custom_section_ && !options_.fail_on_custom_section_error ? ErrorLevel::Warning : ErrorLevel::Error; WABT_SNPRINTF_ALLOCA(buffer, length, format); Error error(error_level, Location(state_.offset), buffer); bool handled = delegate_->OnError(error); if (!handled) { // Not great to just print, but we don't want to eat the error either. fprintf(stderr, "%07" PRIzx ": %s: %s\n", state_.offset, GetErrorLevelName(error_level), buffer); } } Result BinaryReader::ReportUnexpectedOpcode(Opcode opcode, const char* where) { std::string message = "unexpected opcode"; if (where) { message += ' '; message += where; } message += ":"; std::vector<uint8_t> bytes = opcode.GetBytes(); assert(bytes.size() > 0); for (uint8_t byte : bytes) { message += StringPrintf(" 0x%x", byte); } PrintError("%s", message.c_str()); return Result::Error; } Result BinaryReader::ReadOpcode(Opcode* out_value, const char* desc) { uint8_t value = 0; CHECK_RESULT(ReadU8(&value, desc)); if (Opcode::IsPrefixByte(value)) { uint32_t code; CHECK_RESULT(ReadU32Leb128(&code, desc)); *out_value = Opcode::FromCode(value, code); } else { *out_value = Opcode::FromCode(value); } return Result::Ok; } template <typename T> Result BinaryReader::ReadT(T* out_value, const char* type_name, const char* desc) { if (state_.offset + sizeof(T) > read_end_) { PrintError("unable to read %s: %s", type_name, desc); return Result::Error; } #if WABT_BIG_ENDIAN uint8_t tmp[sizeof(T)]; memcpy(tmp, state_.data + state_.offset, sizeof(tmp)); SwapBytesSized(tmp, sizeof(tmp)); memcpy(out_value, tmp, sizeof(T)); #else memcpy(out_value, state_.data + state_.offset, sizeof(T)); #endif state_.offset += sizeof(T); return Result::Ok; } Result BinaryReader::ReadU8(uint8_t* out_value, const char* desc) { return ReadT(out_value, "uint8_t", desc); } Result BinaryReader::ReadU32(uint32_t* out_value, const char* desc) { return ReadT(out_value, "uint32_t", desc); } Result BinaryReader::ReadF32(uint32_t* out_value, const char* desc) { return ReadT(out_value, "float", desc); } Result BinaryReader::ReadF64(uint64_t* out_value, const char* desc) { return ReadT(out_value, "double", desc); } Result BinaryReader::ReadV128(v128* out_value, const char* desc) { return ReadT(out_value, "v128", desc); } Result BinaryReader::ReadU32Leb128(uint32_t* out_value, const char* desc) { const uint8_t* p = state_.data + state_.offset; const uint8_t* end = state_.data + read_end_; size_t bytes_read = wabt::ReadU32Leb128(p, end, out_value); ERROR_UNLESS(bytes_read > 0, "unable to read u32 leb128: %s", desc); state_.offset += bytes_read; return Result::Ok; } Result BinaryReader::ReadU64Leb128(uint64_t* out_value, const char* desc) { const uint8_t* p = state_.data + state_.offset; const uint8_t* end = state_.data + read_end_; size_t bytes_read = wabt::ReadU64Leb128(p, end, out_value); ERROR_UNLESS(bytes_read > 0, "unable to read u64 leb128: %s", desc); state_.offset += bytes_read; return Result::Ok; } Result BinaryReader::ReadS32Leb128(uint32_t* out_value, const char* desc) { const uint8_t* p = state_.data + state_.offset; const uint8_t* end = state_.data + read_end_; size_t bytes_read = wabt::ReadS32Leb128(p, end, out_value); ERROR_UNLESS(bytes_read > 0, "unable to read i32 leb128: %s", desc); state_.offset += bytes_read; return Result::Ok; } Result BinaryReader::ReadS64Leb128(uint64_t* out_value, const char* desc) { const uint8_t* p = state_.data + state_.offset; const uint8_t* end = state_.data + read_end_; size_t bytes_read = wabt::ReadS64Leb128(p, end, out_value); ERROR_UNLESS(bytes_read > 0, "unable to read i64 leb128: %s", desc); state_.offset += bytes_read; return Result::Ok; } Result BinaryReader::ReadType(Type* out_value, const char* desc) { uint32_t type = 0; CHECK_RESULT(ReadS32Leb128(&type, desc)); if (static_cast<Type::Enum>(type) == Type::Reference) { uint32_t heap_type = 0; CHECK_RESULT(ReadS32Leb128(&heap_type, desc)); *out_value = Type(Type::Reference, heap_type); } else { *out_value = static_cast<Type>(type); } return Result::Ok; } Result BinaryReader::ReadRefType(Type* out_value, const char* desc) { uint32_t type = 0; CHECK_RESULT(ReadS32Leb128(&type, desc)); *out_value = static_cast<Type>(type); ERROR_UNLESS(out_value->IsRef(), "%s must be a reference type", desc); return Result::Ok; } Result BinaryReader::ReadExternalKind(ExternalKind* out_value, const char* desc) { uint8_t value = 0; CHECK_RESULT(ReadU8(&value, desc)); ERROR_UNLESS(value < kExternalKindCount, "invalid export external kind: %d", value); *out_value = static_cast<ExternalKind>(value); return Result::Ok; } Result BinaryReader::ReadStr(std::string_view* out_str, const char* desc) { uint32_t str_len = 0; CHECK_RESULT(ReadU32Leb128(&str_len, "string length")); ERROR_UNLESS(state_.offset + str_len <= read_end_, "unable to read string: %s", desc); *out_str = std::string_view( reinterpret_cast<const char*>(state_.data) + state_.offset, str_len); state_.offset += str_len; ERROR_UNLESS(IsValidUtf8(out_str->data(), out_str->length()), "invalid utf-8 encoding: %s", desc); return Result::Ok; } Result BinaryReader::ReadBytes(const void** out_data, Address* out_data_size, const char* desc) { uint32_t data_size = 0; CHECK_RESULT(ReadU32Leb128(&data_size, "data size")); CHECK_RESULT(ReadBytesWithSize(out_data, data_size, desc)); *out_data_size = data_size; return Result::Ok; } Result BinaryReader::ReadBytesWithSize(const void** out_data, Offset size, const char* desc) { ERROR_UNLESS(state_.offset + size <= read_end_, "unable to read data: %s", desc); *out_data = static_cast<const uint8_t*>(state_.data) + state_.offset; state_.offset += size; return Result::Ok; } Result BinaryReader::ReadIndex(Index* index, const char* desc) { uint32_t value; CHECK_RESULT(ReadU32Leb128(&value, desc)); *index = value; return Result::Ok; } Result BinaryReader::ReadOffset(Offset* offset, const char* desc) { uint32_t value; CHECK_RESULT(ReadU32Leb128(&value, desc)); *offset = value; return Result::Ok; } Result BinaryReader::ReadAlignment(Address* alignment_log2, const char* desc) { uint32_t value; CHECK_RESULT(ReadU32Leb128(&value, desc)); *alignment_log2 = value; return Result::Ok; } Result BinaryReader::CheckAlignment(Address* align_log2, const char* desc) { uint32_t value = *align_log2; if (value >= 32) { PrintError("invalid %s: %" PRIu32, desc, value); return Result::Error; } return Result::Ok; } Result BinaryReader::TakeHasMemidx(Address* align_log2, bool* has_memidx) { // extract the has_memidx flag *has_memidx = (*align_log2 >> 6) & 1; // then clear it *align_log2 &= ~(1 << 6); return Result::Ok; } Result BinaryReader::ReadMemidx(Index* memidx, const char* desc) { CHECK_RESULT(ReadIndex(memidx, desc)); return Result::Ok; } Result BinaryReader::ReadMemLocation(Address* alignment_log2, Index* memidx, Address* offset, const char* desc_align, const char* desc_memidx, const char* desc_offset, uint8_t* lane_val) { bool has_memidx = false; CHECK_RESULT(ReadAlignment(alignment_log2, desc_align)); CHECK_RESULT(TakeHasMemidx(alignment_log2, &has_memidx)); CHECK_RESULT(CheckAlignment(alignment_log2, desc_align)); *memidx = 0; if (has_memidx) { ERROR_IF(!options_.features.multi_memory_enabled(), "multi_memory not allowed"); CHECK_RESULT(ReadMemidx(memidx, desc_memidx)); } CHECK_RESULT(ReadAddress(offset, 0, desc_offset)); if (lane_val) { CHECK_RESULT(ReadU8(lane_val, "Lane idx")); } return Result::Ok; } Result BinaryReader::CallbackMemLocation(const Address* alignment_log2, const Index* memidx, const Address* offset, const uint8_t* lane_val) { if (lane_val) { if (*memidx) { CALLBACK(OnOpcodeUint32Uint32Uint32Uint32, *alignment_log2, *memidx, *offset, *lane_val); } else { CALLBACK(OnOpcodeUint32Uint32Uint32, *alignment_log2, *offset, *lane_val); } } else { if (*memidx) { CALLBACK(OnOpcodeUint32Uint32Uint32, *alignment_log2, *memidx, *offset); } else { CALLBACK(OnOpcodeUint32Uint32, *alignment_log2, *offset); } } return Result::Ok; } Result BinaryReader::ReadCount(Index* count, const char* desc) { CHECK_RESULT(ReadIndex(count, desc)); // This check assumes that each item follows in this section, and takes at // least 1 byte. It's possible that this check passes but reading fails // later. It is still useful to check here, though, because it early-outs // when an erroneous large count is used, before allocating memory for it. size_t section_remaining = read_end_ - state_.offset; if (*count > section_remaining) { PrintError("invalid %s %" PRIindex ", only %" PRIzd " bytes left in section", desc, *count, section_remaining); return Result::Error; } return Result::Ok; } Result BinaryReader::ReadField(TypeMut* out_value) { // TODO: Reuse for global header too? Type field_type; CHECK_RESULT(ReadType(&field_type, "field type")); ERROR_UNLESS(IsConcreteType(field_type), "expected valid field type (got " PRItypecode ")", WABT_PRINTF_TYPE_CODE(field_type)); uint8_t mutable_ = 0; CHECK_RESULT(ReadU8(&mutable_, "field mutability")); ERROR_UNLESS(mutable_ <= 1, "field mutability must be 0 or 1"); out_value->type = field_type; out_value->mutable_ = mutable_; return Result::Ok; } bool BinaryReader::IsConcreteType(Type type) { switch (type) { case Type::I32: case Type::I64: case Type::F32: case Type::F64: return true; case Type::V128: return options_.features.simd_enabled(); case Type::FuncRef: case Type::ExternRef: return options_.features.reference_types_enabled(); case Type::ExnRef: return options_.features.exceptions_enabled(); case Type::Reference: return options_.features.function_references_enabled(); default: return false; } } bool BinaryReader::IsBlockType(Type type) { if (IsConcreteType(type) || type == Type::Void) { return true; } if (!(options_.features.multi_value_enabled() && type.IsIndex())) { return false; } return true; } Index BinaryReader::NumTotalFuncs() { return num_func_imports_ + num_function_signatures_; } Result BinaryReader::ReadInitExpr(Index index) { CHECK_RESULT(ReadInstructions(read_end_, "init expression")); assert(state_.offset <= read_end_); return Result::Ok; } Result BinaryReader::ReadTable(Type* out_elem_type, Limits* out_elem_limits) { CHECK_RESULT(ReadRefType(out_elem_type, "table elem type")); uint8_t flags; uint32_t initial; uint32_t max = 0; CHECK_RESULT(ReadU8(&flags, "table flags")); bool has_max = flags & WABT_BINARY_LIMITS_HAS_MAX_FLAG; bool is_shared = flags & WABT_BINARY_LIMITS_IS_SHARED_FLAG; bool is_64 = flags & WABT_BINARY_LIMITS_IS_64_FLAG; const uint8_t unknown_flags = flags & ~WABT_BINARY_LIMITS_ALL_TABLE_FLAGS; ERROR_IF(is_shared, "tables may not be shared"); ERROR_IF(is_64 && !options_.features.memory64_enabled(), "memory64 not allowed"); ERROR_UNLESS(unknown_flags == 0, "malformed table limits flag: %d", flags); CHECK_RESULT(ReadU32Leb128(&initial, "table initial elem count")); if (has_max) { CHECK_RESULT(ReadU32Leb128(&max, "table max elem count")); } out_elem_limits->has_max = has_max; out_elem_limits->is_64 = is_64; out_elem_limits->initial = initial; out_elem_limits->max = max; return Result::Ok; } Result BinaryReader::ReadMemory(Limits* out_page_limits, uint32_t* out_page_size) { uint8_t flags; uint64_t initial; uint64_t max = 0; CHECK_RESULT(ReadU8(&flags, "memory flags")); bool has_max = flags & WABT_BINARY_LIMITS_HAS_MAX_FLAG; bool is_shared = flags & WABT_BINARY_LIMITS_IS_SHARED_FLAG; bool is_64 = flags & WABT_BINARY_LIMITS_IS_64_FLAG; bool has_custom_page_size = flags & WABT_BINARY_LIMITS_HAS_CUSTOM_PAGE_SIZE_FLAG; const uint8_t unknown_flags = flags & ~WABT_BINARY_LIMITS_ALL_MEMORY_FLAGS; ERROR_UNLESS(unknown_flags == 0, "malformed memory limits flag: %d", flags); ERROR_IF(is_shared && !options_.features.threads_enabled(), "memory may not be shared: threads not allowed"); ERROR_IF(is_64 && !options_.features.memory64_enabled(), "memory64 not allowed"); ERROR_IF( has_custom_page_size && !options_.features.custom_page_sizes_enabled(), "custom page sizes not allowed"); if (options_.features.memory64_enabled()) { CHECK_RESULT(ReadU64Leb128(&initial, "memory initial page count")); if (has_max) { CHECK_RESULT(ReadU64Leb128(&max, "memory max page count")); } } else { uint32_t initial32; CHECK_RESULT(ReadU32Leb128(&initial32, "memory initial page count")); initial = initial32; if (has_max) { uint32_t max32; CHECK_RESULT(ReadU32Leb128(&max32, "memory max page count")); max = max32; } } if (has_custom_page_size) { uint32_t page_size_log2; CHECK_RESULT(ReadU32Leb128(&page_size_log2, "memory page size")); ERROR_IF(page_size_log2 > 16, "malformed memory page size"); *out_page_size = 1 << page_size_log2; } else { *out_page_size = WABT_DEFAULT_PAGE_SIZE; } out_page_limits->has_max = has_max; out_page_limits->is_shared = is_shared; out_page_limits->is_64 = is_64; out_page_limits->initial = initial; out_page_limits->max = max; return Result::Ok; } Result BinaryReader::ReadGlobalHeader(Type* out_type, bool* out_mutable) { Type global_type = Type::Void; uint8_t mutable_ = 0; CHECK_RESULT(ReadType(&global_type, "global type")); ERROR_UNLESS(IsConcreteType(global_type), "invalid global type: %#x", static_cast<int>(global_type)); CHECK_RESULT(ReadU8(&mutable_, "global mutability")); ERROR_UNLESS(mutable_ <= 1, "global mutability must be 0 or 1"); *out_type = global_type; *out_mutable = mutable_; return Result::Ok; } Result BinaryReader::ReadAddress(Address* out_value, Index memory, const char* desc) { if (options_.features.memory64_enabled()) { return ReadU64Leb128(out_value, desc); } else { uint32_t val; Result res = ReadU32Leb128(&val, desc); *out_value = val; return res; } } Result BinaryReader::ReadFunctionBody(Offset end_offset) { CHECK_RESULT(ReadInstructions(end_offset, "function body")); ERROR_UNLESS(state_.offset == end_offset, "function body shorter than given size"); return Result::Ok; } Result BinaryReader::ReadInstructions(Offset end_offset, const char* context) { std::stack<Opcode> nested_blocks; while (state_.offset < end_offset) { Opcode opcode; CHECK_RESULT(ReadOpcode(&opcode, "opcode")); CALLBACK(OnOpcode, opcode); ERROR_UNLESS_OPCODE_ENABLED(opcode); switch (opcode) { case Opcode::Unreachable: CALLBACK0(OnUnreachableExpr); CALLBACK0(OnOpcodeBare); break; case Opcode::Block: { nested_blocks.push(opcode); Type sig_type; CHECK_RESULT(ReadType(&sig_type, "block signature type")); ERROR_UNLESS(IsBlockType(sig_type), "expected valid block signature type"); CALLBACK(OnBlockExpr, sig_type); CALLBACK(OnOpcodeBlockSig, sig_type); break; } case Opcode::Loop: { nested_blocks.push(opcode); Type sig_type; CHECK_RESULT(ReadType(&sig_type, "loop signature type")); ERROR_UNLESS(IsBlockType(sig_type), "expected valid block signature type"); CALLBACK(OnLoopExpr, sig_type); CALLBACK(OnOpcodeBlockSig, sig_type); break; } case Opcode::If: { nested_blocks.push(opcode); Type sig_type; CHECK_RESULT(ReadType(&sig_type, "if signature type")); ERROR_UNLESS(IsBlockType(sig_type), "expected valid block signature type"); CALLBACK(OnIfExpr, sig_type); CALLBACK(OnOpcodeBlockSig, sig_type); break; } case Opcode::Else: ERROR_IF(nested_blocks.empty() || (nested_blocks.top() != Opcode::If), "else outside if block"); CALLBACK0(OnElseExpr); CALLBACK0(OnOpcodeBare); break; case Opcode::SelectT: { Index num_results; CHECK_RESULT(ReadCount(&num_results, "num result types")); result_types_.resize(num_results); for (Index i = 0; i < num_results; ++i) { Type result_type; CHECK_RESULT(ReadType(&result_type, "select result type")); ERROR_UNLESS(IsConcreteType(result_type), "expected valid select result type (got " PRItypecode ")", WABT_PRINTF_TYPE_CODE(result_type)); result_types_[i] = result_type; } if (num_results) { CALLBACK(OnSelectExpr, num_results, result_types_.data()); CALLBACK(OnOpcodeType, result_types_[0]); } else { CALLBACK(OnSelectExpr, 0, NULL); CALLBACK0(OnOpcodeBare); } break; } case Opcode::Select: CALLBACK(OnSelectExpr, 0, nullptr); CALLBACK0(OnOpcodeBare); break; case Opcode::Br: { Index depth; CHECK_RESULT(ReadIndex(&depth, "br depth")); CALLBACK(OnBrExpr, depth); CALLBACK(OnOpcodeIndex, depth); break; } case Opcode::BrIf: { Index depth; CHECK_RESULT(ReadIndex(&depth, "br_if depth")); CALLBACK(OnBrIfExpr, depth); CALLBACK(OnOpcodeIndex, depth); break; } case Opcode::BrTable: { Index num_targets; CHECK_RESULT(ReadCount(&num_targets, "br_table target count")); target_depths_.resize(num_targets); for (Index i = 0; i < num_targets; ++i) { Index target_depth; CHECK_RESULT(ReadIndex(&target_depth, "br_table target depth")); target_depths_[i] = target_depth; } Index default_target_depth; CHECK_RESULT( ReadIndex(&default_target_depth, "br_table default target depth")); Index* target_depths = num_targets ? target_depths_.data() : nullptr; CALLBACK(OnBrTableExpr, num_targets, target_depths, default_target_depth); break; } case Opcode::Return: CALLBACK0(OnReturnExpr); CALLBACK0(OnOpcodeBare); break; case Opcode::Nop: CALLBACK0(OnNopExpr); CALLBACK0(OnOpcodeBare); break; case Opcode::Drop: CALLBACK0(OnDropExpr); CALLBACK0(OnOpcodeBare); break; case Opcode::End: CALLBACK0(OnEndExpr); if (nested_blocks.empty()) { return Result::Ok; } nested_blocks.pop(); break; case Opcode::I32Const: { uint32_t value; CHECK_RESULT(ReadS32Leb128(&value, "i32.const value")); CALLBACK(OnI32ConstExpr, value); CALLBACK(OnOpcodeUint32, value); break; } case Opcode::I64Const: { uint64_t value; CHECK_RESULT(ReadS64Leb128(&value, "i64.const value")); CALLBACK(OnI64ConstExpr, value); CALLBACK(OnOpcodeUint64, value); break; } case Opcode::F32Const: { uint32_t value_bits = 0; CHECK_RESULT(ReadF32(&value_bits, "f32.const value")); CALLBACK(OnF32ConstExpr, value_bits); CALLBACK(OnOpcodeF32, value_bits); break; } case Opcode::F64Const: { uint64_t value_bits = 0; CHECK_RESULT(ReadF64(&value_bits, "f64.const value")); CALLBACK(OnF64ConstExpr, value_bits); CALLBACK(OnOpcodeF64, value_bits); break; } case Opcode::V128Const: { v128 value_bits; ZeroMemory(value_bits); CHECK_RESULT(ReadV128(&value_bits, "v128.const value")); CALLBACK(OnV128ConstExpr, value_bits); CALLBACK(OnOpcodeV128, value_bits); break; } case Opcode::GlobalGet: { Index global_index; CHECK_RESULT(ReadIndex(&global_index, "global.get global index")); CALLBACK(OnGlobalGetExpr, global_index); CALLBACK(OnOpcodeIndex, global_index); break; } case Opcode::LocalGet: { Index local_index; CHECK_RESULT(ReadIndex(&local_index, "local.get local index")); CALLBACK(OnLocalGetExpr, local_index); CALLBACK(OnOpcodeIndex, local_index); break; } case Opcode::GlobalSet: { Index global_index; CHECK_RESULT(ReadIndex(&global_index, "global.set global index")); CALLBACK(OnGlobalSetExpr, global_index); CALLBACK(OnOpcodeIndex, global_index); break; } case Opcode::LocalSet: { Index local_index; CHECK_RESULT(ReadIndex(&local_index, "local.set local index")); CALLBACK(OnLocalSetExpr, local_index); CALLBACK(OnOpcodeIndex, local_index); break; } case Opcode::Call: { Index func_index; CHECK_RESULT(ReadIndex(&func_index, "call function index")); CALLBACK(OnCallExpr, func_index); CALLBACK(OnOpcodeIndex, func_index); break; } case Opcode::CallIndirect: { Index sig_index; CHECK_RESULT(ReadIndex(&sig_index, "call_indirect signature index")); Index table_index = 0; if (options_.features.reference_types_enabled()) { CHECK_RESULT(ReadIndex(&table_index, "call_indirect table index")); } else { uint8_t reserved; CHECK_RESULT(ReadU8(&reserved, "call_indirect reserved")); ERROR_UNLESS(reserved == 0, "call_indirect reserved value must be 0"); } CALLBACK(OnCallIndirectExpr, sig_index, table_index); CALLBACK(OnOpcodeUint32Uint32, sig_index, table_index); break; } case Opcode::ReturnCall: { Index func_index; CHECK_RESULT(ReadIndex(&func_index, "return_call")); CALLBACK(OnReturnCallExpr, func_index); CALLBACK(OnOpcodeIndex, func_index); break; } case Opcode::ReturnCallIndirect: { Index sig_index; CHECK_RESULT(ReadIndex(&sig_index, "return_call_indirect")); Index table_index = 0; if (options_.features.reference_types_enabled()) { CHECK_RESULT( ReadIndex(&table_index, "return_call_indirect table index")); } else { uint8_t reserved; CHECK_RESULT(ReadU8(&reserved, "return_call_indirect reserved")); ERROR_UNLESS(reserved == 0, "return_call_indirect reserved value must be 0"); } CALLBACK(OnReturnCallIndirectExpr, sig_index, table_index); CALLBACK(OnOpcodeUint32Uint32, sig_index, table_index); break; } case Opcode::LocalTee: { Index local_index; CHECK_RESULT(ReadIndex(&local_index, "local.tee local index")); CALLBACK(OnLocalTeeExpr, local_index); CALLBACK(OnOpcodeIndex, local_index); break; } case Opcode::I32Load8S: case Opcode::I32Load8U: case Opcode::I32Load16S: case Opcode::I32Load16U: case Opcode::I64Load8S: case Opcode::I64Load8U: case Opcode::I64Load16S: case Opcode::I64Load16U: case Opcode::I64Load32S: case Opcode::I64Load32U: case Opcode::I32Load: case Opcode::I64Load: case Opcode::F32Load: case Opcode::F64Load: case Opcode::V128Load: case Opcode::V128Load8X8S: case Opcode::V128Load8X8U: case Opcode::V128Load16X4S: case Opcode::V128Load16X4U: case Opcode::V128Load32X2S: case Opcode::V128Load32X2U: { Address alignment_log2; Index memidx; Address offset; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "load alignment", "load memidx", "load offset")); CALLBACK(OnLoadExpr, opcode, memidx, alignment_log2, offset); CHECK_RESULT(CallbackMemLocation(&alignment_log2, &memidx, &offset)); break; } case Opcode::I32Store8: case Opcode::I32Store16: case Opcode::I64Store8: case Opcode::I64Store16: case Opcode::I64Store32: case Opcode::I32Store: case Opcode::I64Store: case Opcode::F32Store: case Opcode::F64Store: case Opcode::V128Store: { Address alignment_log2; Index memidx; Address offset; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "store alignment", "store memidx", "store offset")); CALLBACK(OnStoreExpr, opcode, memidx, alignment_log2, offset); CHECK_RESULT(CallbackMemLocation(&alignment_log2, &memidx, &offset)); break; } case Opcode::MemorySize: { Index memidx = 0; if (!options_.features.multi_memory_enabled()) { uint8_t reserved; CHECK_RESULT(ReadU8(&reserved, "memory.size reserved")); ERROR_UNLESS(reserved == 0, "memory.size reserved value must be 0"); } else { CHECK_RESULT(ReadMemidx(&memidx, "memory.size memidx")); } CALLBACK(OnMemorySizeExpr, memidx); CALLBACK(OnOpcodeUint32, memidx); break; } case Opcode::MemoryGrow: { Index memidx = 0; if (!options_.features.multi_memory_enabled()) { uint8_t reserved; CHECK_RESULT(ReadU8(&reserved, "memory.grow reserved")); ERROR_UNLESS(reserved == 0, "memory.grow reserved value must be 0"); } else { CHECK_RESULT(ReadMemidx(&memidx, "memory.grow memidx")); } CALLBACK(OnMemoryGrowExpr, memidx); CALLBACK(OnOpcodeUint32, memidx); break; } case Opcode::I32Add: case Opcode::I32Sub: case Opcode::I32Mul: case Opcode::I32DivS: case Opcode::I32DivU: case Opcode::I32RemS: case Opcode::I32RemU: case Opcode::I32And: case Opcode::I32Or: case Opcode::I32Xor: case Opcode::I32Shl: case Opcode::I32ShrU: case Opcode::I32ShrS: case Opcode::I32Rotr: case Opcode::I32Rotl: case Opcode::I64Add: case Opcode::I64Sub: case Opcode::I64Mul: case Opcode::I64DivS: case Opcode::I64DivU: case Opcode::I64RemS: case Opcode::I64RemU: case Opcode::I64And: case Opcode::I64Or: case Opcode::I64Xor: case Opcode::I64Shl: case Opcode::I64ShrU: case Opcode::I64ShrS: case Opcode::I64Rotr: case Opcode::I64Rotl: case Opcode::F32Add: case Opcode::F32Sub: case Opcode::F32Mul: case Opcode::F32Div: case Opcode::F32Min: case Opcode::F32Max: case Opcode::F32Copysign: case Opcode::F64Add: case Opcode::F64Sub: case Opcode::F64Mul: case Opcode::F64Div: case Opcode::F64Min: case Opcode::F64Max: case Opcode::F64Copysign: case Opcode::I8X16Add: case Opcode::I16X8Add: case Opcode::I32X4Add: case Opcode::I64X2Add: case Opcode::I8X16Sub: case Opcode::I16X8Sub: case Opcode::I32X4Sub: case Opcode::I64X2Sub: case Opcode::I16X8Mul: case Opcode::I32X4Mul: case Opcode::I64X2Mul: case Opcode::I8X16AddSatS: case Opcode::I8X16AddSatU: case Opcode::I16X8AddSatS: case Opcode::I16X8AddSatU: case Opcode::I8X16SubSatS: case Opcode::I8X16SubSatU: case Opcode::I16X8SubSatS: case Opcode::I16X8SubSatU: case Opcode::I8X16MinS: case Opcode::I16X8MinS: case Opcode::I32X4MinS: case Opcode::I8X16MinU: case Opcode::I16X8MinU: case Opcode::I32X4MinU: case Opcode::I8X16MaxS: case Opcode::I16X8MaxS: case Opcode::I32X4MaxS: case Opcode::I8X16MaxU: case Opcode::I16X8MaxU: case Opcode::I32X4MaxU: case Opcode::I8X16Shl: case Opcode::I16X8Shl: case Opcode::I32X4Shl: case Opcode::I64X2Shl: case Opcode::I8X16ShrS: case Opcode::I8X16ShrU: case Opcode::I16X8ShrS: case Opcode::I16X8ShrU: case Opcode::I32X4ShrS: case Opcode::I32X4ShrU: case Opcode::I64X2ShrS: case Opcode::I64X2ShrU: case Opcode::V128And: case Opcode::V128Or: case Opcode::V128Xor: case Opcode::F32X4Min: case Opcode::F32X4PMin: case Opcode::F64X2Min: case Opcode::F64X2PMin: case Opcode::F32X4Max: case Opcode::F32X4PMax: case Opcode::F64X2Max: case Opcode::F64X2PMax: case Opcode::F32X4Add: case Opcode::F64X2Add: case Opcode::F32X4Sub: case Opcode::F64X2Sub: case Opcode::F32X4Div: case Opcode::F64X2Div: case Opcode::F32X4Mul: case Opcode::F64X2Mul: case Opcode::I8X16Swizzle: case Opcode::I8X16NarrowI16X8S: case Opcode::I8X16NarrowI16X8U: case Opcode::I16X8NarrowI32X4S: case Opcode::I16X8NarrowI32X4U: case Opcode::V128Andnot: case Opcode::I8X16AvgrU: case Opcode::I16X8AvgrU: case Opcode::I16X8ExtmulLowI8X16S: case Opcode::I16X8ExtmulHighI8X16S: case Opcode::I16X8ExtmulLowI8X16U: case Opcode::I16X8ExtmulHighI8X16U: case Opcode::I32X4ExtmulLowI16X8S: case Opcode::I32X4ExtmulHighI16X8S: case Opcode::I32X4ExtmulLowI16X8U: case Opcode::I32X4ExtmulHighI16X8U: case Opcode::I64X2ExtmulLowI32X4S: case Opcode::I64X2ExtmulHighI32X4S: case Opcode::I64X2ExtmulLowI32X4U: case Opcode::I64X2ExtmulHighI32X4U: case Opcode::I16X8Q15mulrSatS: case Opcode::I32X4DotI16X8S: case Opcode::I8X16RelaxedSwizzle: case Opcode::F32X4RelaxedMin: case Opcode::F32X4RelaxedMax: case Opcode::F64X2RelaxedMin: case Opcode::F64X2RelaxedMax: case Opcode::I16X8RelaxedQ15mulrS: case Opcode::I16X8DotI8X16I7X16S: CALLBACK(OnBinaryExpr, opcode); CALLBACK0(OnOpcodeBare); break; case Opcode::I32Eq: case Opcode::I32Ne: case Opcode::I32LtS: case Opcode::I32LeS: case Opcode::I32LtU: case Opcode::I32LeU: case Opcode::I32GtS: case Opcode::I32GeS: case Opcode::I32GtU: case Opcode::I32GeU: case Opcode::I64Eq: case Opcode::I64Ne: case Opcode::I64LtS: case Opcode::I64LeS: case Opcode::I64LtU: case Opcode::I64LeU: case Opcode::I64GtS: case Opcode::I64GeS: case Opcode::I64GtU: case Opcode::I64GeU: case Opcode::F32Eq: case Opcode::F32Ne: case Opcode::F32Lt: case Opcode::F32Le: case Opcode::F32Gt: case Opcode::F32Ge: case Opcode::F64Eq: case Opcode::F64Ne: case Opcode::F64Lt: case Opcode::F64Le: case Opcode::F64Gt: case Opcode::F64Ge: case Opcode::I8X16Eq: case Opcode::I16X8Eq: case Opcode::I32X4Eq: case Opcode::I64X2Eq: case Opcode::F32X4Eq: case Opcode::F64X2Eq: case Opcode::I8X16Ne: case Opcode::I16X8Ne: case Opcode::I32X4Ne: case Opcode::I64X2Ne: case Opcode::F32X4Ne: case Opcode::F64X2Ne: case Opcode::I8X16LtS: case Opcode::I8X16LtU: case Opcode::I16X8LtS: case Opcode::I16X8LtU: case Opcode::I32X4LtS: case Opcode::I32X4LtU: case Opcode::I64X2LtS: case Opcode::F32X4Lt: case Opcode::F64X2Lt: case Opcode::I8X16LeS: case Opcode::I8X16LeU: case Opcode::I16X8LeS: case Opcode::I16X8LeU: case Opcode::I32X4LeS: case Opcode::I32X4LeU: case Opcode::I64X2LeS: case Opcode::F32X4Le: case Opcode::F64X2Le: case Opcode::I8X16GtS: case Opcode::I8X16GtU: case Opcode::I16X8GtS: case Opcode::I16X8GtU: case Opcode::I32X4GtS: case Opcode::I32X4GtU: case Opcode::I64X2GtS: case Opcode::F32X4Gt: case Opcode::F64X2Gt: case Opcode::I8X16GeS: case Opcode::I8X16GeU: case Opcode::I16X8GeS: case Opcode::I16X8GeU: case Opcode::I32X4GeS: case Opcode::I32X4GeU: case Opcode::I64X2GeS: case Opcode::F32X4Ge: case Opcode::F64X2Ge: CALLBACK(OnCompareExpr, opcode); CALLBACK0(OnOpcodeBare); break; case Opcode::I32Clz: case Opcode::I32Ctz: case Opcode::I32Popcnt: case Opcode::I64Clz: case Opcode::I64Ctz: case Opcode::I64Popcnt: case Opcode::F32Abs: case Opcode::F32Neg: case Opcode::F32Ceil: case Opcode::F32Floor: case Opcode::F32Trunc: case Opcode::F32Nearest: case Opcode::F32Sqrt: case Opcode::F64Abs: case Opcode::F64Neg: case Opcode::F64Ceil: case Opcode::F64Floor: case Opcode::F64Trunc: case Opcode::F64Nearest: case Opcode::F64Sqrt: case Opcode::I8X16Splat: case Opcode::I16X8Splat: case Opcode::I32X4Splat: case Opcode::I64X2Splat: case Opcode::F32X4Splat: case Opcode::F64X2Splat: case Opcode::I8X16Neg: case Opcode::I16X8Neg: case Opcode::I32X4Neg: case Opcode::I64X2Neg: case Opcode::V128Not: case Opcode::V128AnyTrue: case Opcode::I8X16Bitmask: case Opcode::I16X8Bitmask: case Opcode::I32X4Bitmask: case Opcode::I64X2Bitmask: case Opcode::I8X16AllTrue: case Opcode::I16X8AllTrue: case Opcode::I32X4AllTrue: case Opcode::I64X2AllTrue: case Opcode::F32X4Ceil: case Opcode::F64X2Ceil: case Opcode::F32X4Floor: case Opcode::F64X2Floor: case Opcode::F32X4Trunc: case Opcode::F64X2Trunc: case Opcode::F32X4Nearest: case Opcode::F64X2Nearest: case Opcode::F32X4Neg: case Opcode::F64X2Neg: case Opcode::F32X4Abs: case Opcode::F64X2Abs: case Opcode::F32X4Sqrt: case Opcode::F64X2Sqrt: case Opcode::I16X8ExtendLowI8X16S: case Opcode::I16X8ExtendHighI8X16S: case Opcode::I16X8ExtendLowI8X16U: case Opcode::I16X8ExtendHighI8X16U: case Opcode::I32X4ExtendLowI16X8S: case Opcode::I32X4ExtendHighI16X8S: case Opcode::I32X4ExtendLowI16X8U: case Opcode::I32X4ExtendHighI16X8U: case Opcode::I64X2ExtendLowI32X4S: case Opcode::I64X2ExtendHighI32X4S: case Opcode::I64X2ExtendLowI32X4U: case Opcode::I64X2ExtendHighI32X4U: case Opcode::I8X16Abs: case Opcode::I16X8Abs: case Opcode::I32X4Abs: case Opcode::I64X2Abs: case Opcode::I8X16Popcnt: case Opcode::I16X8ExtaddPairwiseI8X16S: case Opcode::I16X8ExtaddPairwiseI8X16U: case Opcode::I32X4ExtaddPairwiseI16X8S: case Opcode::I32X4ExtaddPairwiseI16X8U: case Opcode::I32X4RelaxedTruncF32X4S: case Opcode::I32X4RelaxedTruncF32X4U: case Opcode::I32X4RelaxedTruncF64X2SZero: case Opcode::I32X4RelaxedTruncF64X2UZero: CALLBACK(OnUnaryExpr, opcode); CALLBACK0(OnOpcodeBare); break; case Opcode::V128BitSelect: case Opcode::F32X4RelaxedMadd: case Opcode::F32X4RelaxedNmadd: case Opcode::F64X2RelaxedMadd: case Opcode::F64X2RelaxedNmadd: case Opcode::I8X16RelaxedLaneSelect: case Opcode::I16X8RelaxedLaneSelect: case Opcode::I32X4RelaxedLaneSelect: case Opcode::I64X2RelaxedLaneSelect: case Opcode::I32X4DotI8X16I7X16AddS: CALLBACK(OnTernaryExpr, opcode); CALLBACK0(OnOpcodeBare); break; case Opcode::I8X16ExtractLaneS: case Opcode::I8X16ExtractLaneU: case Opcode::I16X8ExtractLaneS: case Opcode::I16X8ExtractLaneU: case Opcode::I32X4ExtractLane: case Opcode::I64X2ExtractLane: case Opcode::F32X4ExtractLane: case Opcode::F64X2ExtractLane: case Opcode::I8X16ReplaceLane: case Opcode::I16X8ReplaceLane: case Opcode::I32X4ReplaceLane: case Opcode::I64X2ReplaceLane: case Opcode::F32X4ReplaceLane: case Opcode::F64X2ReplaceLane: { uint8_t lane_val; CHECK_RESULT(ReadU8(&lane_val, "Lane idx")); CALLBACK(OnSimdLaneOpExpr, opcode, lane_val); CALLBACK(OnOpcodeUint64, lane_val); break; } case Opcode::I8X16Shuffle: { v128 value; CHECK_RESULT(ReadV128(&value, "Lane idx [16]")); CALLBACK(OnSimdShuffleOpExpr, opcode, value); CALLBACK(OnOpcodeV128, value); break; } case Opcode::V128Load8Splat: case Opcode::V128Load16Splat: case Opcode::V128Load32Splat: case Opcode::V128Load64Splat: { Address alignment_log2; Index memidx; Address offset; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "load alignment", "load memidx", "load offset")); CALLBACK(OnLoadSplatExpr, opcode, memidx, alignment_log2, offset); CHECK_RESULT(CallbackMemLocation(&alignment_log2, &memidx, &offset)); break; } case Opcode::V128Load8Lane: case Opcode::V128Load16Lane: case Opcode::V128Load32Lane: case Opcode::V128Load64Lane: { Address alignment_log2; Index memidx; Address offset; uint8_t lane_val; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "load alignment", "load memidx", "load offset", &lane_val)); CALLBACK(OnSimdLoadLaneExpr, opcode, memidx, alignment_log2, offset, lane_val); CHECK_RESULT( CallbackMemLocation(&alignment_log2, &memidx, &offset, &lane_val)); break; } case Opcode::V128Store8Lane: case Opcode::V128Store16Lane: case Opcode::V128Store32Lane: case Opcode::V128Store64Lane: { Address alignment_log2; Index memidx; Address offset; uint8_t lane_val; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "store alignment", "store memidx", "store offset", &lane_val)); CALLBACK(OnSimdStoreLaneExpr, opcode, memidx, alignment_log2, offset, lane_val); CHECK_RESULT( CallbackMemLocation(&alignment_log2, &memidx, &offset, &lane_val)); break; } case Opcode::V128Load32Zero: case Opcode::V128Load64Zero: { Address alignment_log2; Index memidx; Address offset; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "load alignment", "load memidx", "load offset")); CALLBACK(OnLoadZeroExpr, opcode, memidx, alignment_log2, offset); CHECK_RESULT(CallbackMemLocation(&alignment_log2, &memidx, &offset)); break; } case Opcode::I32TruncF32S: case Opcode::I32TruncF64S: case Opcode::I32TruncF32U: case Opcode::I32TruncF64U: case Opcode::I32WrapI64: case Opcode::I64TruncF32S: case Opcode::I64TruncF64S: case Opcode::I64TruncF32U: case Opcode::I64TruncF64U: case Opcode::I64ExtendI32S: case Opcode::I64ExtendI32U: case Opcode::F32ConvertI32S: case Opcode::F32ConvertI32U: case Opcode::F32ConvertI64S: case Opcode::F32ConvertI64U: case Opcode::F32DemoteF64: case Opcode::F32ReinterpretI32: case Opcode::F64ConvertI32S: case Opcode::F64ConvertI32U: case Opcode::F64ConvertI64S: case Opcode::F64ConvertI64U: case Opcode::F64PromoteF32: case Opcode::F64ReinterpretI64: case Opcode::I32ReinterpretF32: case Opcode::I64ReinterpretF64: case Opcode::I32Eqz: case Opcode::I64Eqz: case Opcode::F32X4ConvertI32X4S: case Opcode::F32X4ConvertI32X4U: case Opcode::I32X4TruncSatF32X4S: case Opcode::I32X4TruncSatF32X4U: case Opcode::F32X4DemoteF64X2Zero: case Opcode::F64X2PromoteLowF32X4: case Opcode::I32X4TruncSatF64X2SZero: case Opcode::I32X4TruncSatF64X2UZero: case Opcode::F64X2ConvertLowI32X4S: case Opcode::F64X2ConvertLowI32X4U: CALLBACK(OnConvertExpr, opcode); CALLBACK0(OnOpcodeBare); break; case Opcode::Try: { nested_blocks.push(opcode); Type sig_type; CHECK_RESULT(ReadType(&sig_type, "try signature type")); ERROR_UNLESS(IsBlockType(sig_type), "expected valid block signature type"); CALLBACK(OnTryExpr, sig_type); CALLBACK(OnOpcodeBlockSig, sig_type); break; } case Opcode::Catch: { Index index; CHECK_RESULT(ReadIndex(&index, "tag index")); CALLBACK(OnCatchExpr, index); CALLBACK(OnOpcodeIndex, index); break; } case Opcode::CatchAll: { CALLBACK(OnCatchAllExpr); CALLBACK(OnOpcodeBare); break; } case Opcode::Delegate: { ERROR_IF(nested_blocks.empty() || (nested_blocks.top() != Opcode::Try), "delegate outside try block"); nested_blocks.pop(); Index index; CHECK_RESULT(ReadIndex(&index, "depth")); CALLBACK(OnDelegateExpr, index); CALLBACK(OnOpcodeIndex, index); break; } case Opcode::Rethrow: { Index depth; CHECK_RESULT(ReadIndex(&depth, "catch depth")); CALLBACK(OnRethrowExpr, depth); CALLBACK(OnOpcodeIndex, depth); break; } case Opcode::Throw: { Index index; CHECK_RESULT(ReadIndex(&index, "tag index")); CALLBACK(OnThrowExpr, index); CALLBACK(OnOpcodeIndex, index); break; } case Opcode::I32Extend8S: case Opcode::I32Extend16S: case Opcode::I64Extend8S: case Opcode::I64Extend16S: case Opcode::I64Extend32S: CALLBACK(OnUnaryExpr, opcode); CALLBACK0(OnOpcodeBare); break; case Opcode::I32TruncSatF32S: case Opcode::I32TruncSatF32U: case Opcode::I32TruncSatF64S: case Opcode::I32TruncSatF64U: case Opcode::I64TruncSatF32S: case Opcode::I64TruncSatF32U: case Opcode::I64TruncSatF64S: case Opcode::I64TruncSatF64U: CALLBACK(OnConvertExpr, opcode); CALLBACK0(OnOpcodeBare); break; case Opcode::MemoryAtomicNotify: { Address alignment_log2; Index memidx; Address offset; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "notify alignment", "notify memidx", "notify offset")); CALLBACK(OnAtomicNotifyExpr, opcode, memidx, alignment_log2, offset); CHECK_RESULT(CallbackMemLocation(&alignment_log2, &memidx, &offset)); break; } case Opcode::MemoryAtomicWait32: case Opcode::MemoryAtomicWait64: { Address alignment_log2; Index memidx; Address offset; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "wait alignment", "wait memidx", "wait offset")); CALLBACK(OnAtomicWaitExpr, opcode, memidx, alignment_log2, offset); CHECK_RESULT(CallbackMemLocation(&alignment_log2, &memidx, &offset)); break; } case Opcode::AtomicFence: { uint8_t consistency_model; CHECK_RESULT(ReadU8(&consistency_model, "consistency model")); ERROR_UNLESS(consistency_model == 0, "atomic.fence consistency model must be 0"); CALLBACK(OnAtomicFenceExpr, consistency_model); CALLBACK(OnOpcodeUint32, consistency_model); break; } case Opcode::I32AtomicLoad8U: case Opcode::I32AtomicLoad16U: case Opcode::I64AtomicLoad8U: case Opcode::I64AtomicLoad16U: case Opcode::I64AtomicLoad32U: case Opcode::I32AtomicLoad: case Opcode::I64AtomicLoad: { Address alignment_log2; Index memidx; Address offset; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "load alignment", "load memidx", "load offset")); CALLBACK(OnAtomicLoadExpr, opcode, memidx, alignment_log2, offset); CHECK_RESULT(CallbackMemLocation(&alignment_log2, &memidx, &offset)); break; } case Opcode::I32AtomicStore8: case Opcode::I32AtomicStore16: case Opcode::I64AtomicStore8: case Opcode::I64AtomicStore16: case Opcode::I64AtomicStore32: case Opcode::I32AtomicStore: case Opcode::I64AtomicStore: { Address alignment_log2; Index memidx; Address offset; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "store alignment", "store memidx", "store offset")); CALLBACK(OnAtomicStoreExpr, opcode, memidx, alignment_log2, offset); CHECK_RESULT(CallbackMemLocation(&alignment_log2, &memidx, &offset)); break; } case Opcode::I32AtomicRmwAdd: case Opcode::I64AtomicRmwAdd: case Opcode::I32AtomicRmw8AddU: case Opcode::I32AtomicRmw16AddU: case Opcode::I64AtomicRmw8AddU: case Opcode::I64AtomicRmw16AddU: case Opcode::I64AtomicRmw32AddU: case Opcode::I32AtomicRmwSub: case Opcode::I64AtomicRmwSub: case Opcode::I32AtomicRmw8SubU: case Opcode::I32AtomicRmw16SubU: case Opcode::I64AtomicRmw8SubU: case Opcode::I64AtomicRmw16SubU: case Opcode::I64AtomicRmw32SubU: case Opcode::I32AtomicRmwAnd: case Opcode::I64AtomicRmwAnd: case Opcode::I32AtomicRmw8AndU: case Opcode::I32AtomicRmw16AndU: case Opcode::I64AtomicRmw8AndU: case Opcode::I64AtomicRmw16AndU: case Opcode::I64AtomicRmw32AndU: case Opcode::I32AtomicRmwOr: case Opcode::I64AtomicRmwOr: case Opcode::I32AtomicRmw8OrU: case Opcode::I32AtomicRmw16OrU: case Opcode::I64AtomicRmw8OrU: case Opcode::I64AtomicRmw16OrU: case Opcode::I64AtomicRmw32OrU: case Opcode::I32AtomicRmwXor: case Opcode::I64AtomicRmwXor: case Opcode::I32AtomicRmw8XorU: case Opcode::I32AtomicRmw16XorU: case Opcode::I64AtomicRmw8XorU: case Opcode::I64AtomicRmw16XorU: case Opcode::I64AtomicRmw32XorU: case Opcode::I32AtomicRmwXchg: case Opcode::I64AtomicRmwXchg: case Opcode::I32AtomicRmw8XchgU: case Opcode::I32AtomicRmw16XchgU: case Opcode::I64AtomicRmw8XchgU: case Opcode::I64AtomicRmw16XchgU: case Opcode::I64AtomicRmw32XchgU: { Address alignment_log2; Index memidx; Address offset; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "memory alignment", "memory memidx", "memory offset")); CALLBACK(OnAtomicRmwExpr, opcode, memidx, alignment_log2, offset); CHECK_RESULT(CallbackMemLocation(&alignment_log2, &memidx, &offset)); break; } case Opcode::I32AtomicRmwCmpxchg: case Opcode::I64AtomicRmwCmpxchg: case Opcode::I32AtomicRmw8CmpxchgU: case Opcode::I32AtomicRmw16CmpxchgU: case Opcode::I64AtomicRmw8CmpxchgU: case Opcode::I64AtomicRmw16CmpxchgU: case Opcode::I64AtomicRmw32CmpxchgU: { Address alignment_log2; Index memidx; Address offset; CHECK_RESULT(ReadMemLocation(&alignment_log2, &memidx, &offset, "memory alignment", "memory memidx", "memory offset")); CALLBACK(OnAtomicRmwCmpxchgExpr, opcode, memidx, alignment_log2, offset); CHECK_RESULT(CallbackMemLocation(&alignment_log2, &memidx, &offset)); break; } case Opcode::TableInit: { Index segment; CHECK_RESULT(ReadIndex(&segment, "elem segment index")); Index table_index; CHECK_RESULT(ReadIndex(&table_index, "reserved table index")); CALLBACK(OnTableInitExpr, segment, table_index); CALLBACK(OnOpcodeUint32Uint32, segment, table_index); break; } case Opcode::MemoryInit: { Index segment; ERROR_IF(data_count_ == kInvalidIndex, "memory.init requires data count section"); CHECK_RESULT(ReadIndex(&segment, "elem segment index")); Index memidx = 0; if (!options_.features.multi_memory_enabled()) { uint8_t reserved; CHECK_RESULT(ReadU8(&reserved, "reserved memory index")); ERROR_UNLESS(reserved == 0, "reserved value must be 0"); } else { CHECK_RESULT(ReadMemidx(&memidx, "memory.init memidx")); } CALLBACK(OnMemoryInitExpr, segment, memidx); CALLBACK(OnOpcodeUint32Uint32, segment, memidx); break; } case Opcode::DataDrop: ERROR_IF(data_count_ == kInvalidIndex, "data.drop requires data count section"); [[fallthrough]]; case Opcode::ElemDrop: { Index segment; CHECK_RESULT(ReadIndex(&segment, "segment index")); if (opcode == Opcode::DataDrop) { CALLBACK(OnDataDropExpr, segment); } else { CALLBACK(OnElemDropExpr, segment); } CALLBACK(OnOpcodeUint32, segment); break; } case Opcode::MemoryFill: { Index memidx = 0; if (!options_.features.multi_memory_enabled()) { uint8_t reserved; CHECK_RESULT(ReadU8(&reserved, "memory.fill reserved")); ERROR_UNLESS(reserved == 0, "memory.fill reserved value must be 0"); } else { CHECK_RESULT(ReadMemidx(&memidx, "memory.fill memidx")); } CALLBACK(OnMemoryFillExpr, memidx); CALLBACK(OnOpcodeUint32, memidx); break; } case Opcode::MemoryCopy: { Index destmemidx = 0; Index srcmemidx = 0; if (!options_.features.multi_memory_enabled()) { uint8_t reserved; CHECK_RESULT(ReadU8(&reserved, "reserved memory index")); ERROR_UNLESS(reserved == 0, "reserved value must be 0"); CHECK_RESULT(ReadU8(&reserved, "reserved memory index")); ERROR_UNLESS(reserved == 0, "reserved value must be 0"); } else { CHECK_RESULT(ReadMemidx(&destmemidx, "memory.copy destmemindex")); CHECK_RESULT(ReadMemidx(&srcmemidx, "memory.copy srcmemidx")); } CALLBACK(OnMemoryCopyExpr, destmemidx, srcmemidx); CALLBACK(OnOpcodeUint32Uint32, destmemidx, srcmemidx); break; } case Opcode::TableCopy: { Index table_dst; Index table_src; CHECK_RESULT(ReadIndex(&table_dst, "reserved table index")); CHECK_RESULT(ReadIndex(&table_src, "table src")); CALLBACK(OnTableCopyExpr, table_dst, table_src); CALLBACK(OnOpcodeUint32Uint32, table_dst, table_src); break; } case Opcode::TableGet: { Index table; CHECK_RESULT(ReadIndex(&table, "table index")); CALLBACK(OnTableGetExpr, table); CALLBACK(OnOpcodeUint32, table); break; } case Opcode::TableSet: { Index table; CHECK_RESULT(ReadIndex(&table, "table index")); CALLBACK(OnTableSetExpr, table); CALLBACK(OnOpcodeUint32, table); break; } case Opcode::TableGrow: { Index table; CHECK_RESULT(ReadIndex(&table, "table index")); CALLBACK(OnTableGrowExpr, table); CALLBACK(OnOpcodeUint32, table); break; } case Opcode::TableSize: { Index table; CHECK_RESULT(ReadIndex(&table, "table index")); CALLBACK(OnTableSizeExpr, table); CALLBACK(OnOpcodeUint32, table); break; } case Opcode::TableFill: { Index table; CHECK_RESULT(ReadIndex(&table, "table index")); CALLBACK(OnTableFillExpr, table); CALLBACK(OnOpcodeUint32, table); break; } case Opcode::RefFunc: { Index func; CHECK_RESULT(ReadIndex(&func, "func index")); CALLBACK(OnRefFuncExpr, func); CALLBACK(OnOpcodeUint32, func); break; } case Opcode::RefNull: { Type type; CHECK_RESULT(ReadRefType(&type, "ref.null type")); CALLBACK(OnRefNullExpr, type); CALLBACK(OnOpcodeType, type); break; } case Opcode::RefIsNull: CALLBACK(OnRefIsNullExpr); CALLBACK(OnOpcodeBare); break; case Opcode::CallRef: CALLBACK(OnCallRefExpr); CALLBACK(OnOpcodeBare); break; default: return ReportUnexpectedOpcode(opcode); } } PrintError("%s must end with END opcode", context); return Result::Error; } Result BinaryReader::ReadNameSection(Offset section_size) { CALLBACK(BeginNamesSection, section_size); Index i = 0; uint32_t previous_subsection_type = 0; while (state_.offset < read_end_) { uint32_t name_type; Offset subsection_size; CHECK_RESULT(ReadU32Leb128(&name_type, "name type")); if (i != 0) { ERROR_UNLESS(name_type != previous_subsection_type, "duplicate sub-section"); ERROR_UNLESS(name_type >= previous_subsection_type, "out-of-order sub-section"); } previous_subsection_type = name_type; CHECK_RESULT(ReadOffset(&subsection_size, "subsection size")); size_t subsection_end = state_.offset + subsection_size; ERROR_UNLESS(subsection_end <= read_end_, "invalid sub-section size: extends past end"); ReadEndRestoreGuard guard(this); read_end_ = subsection_end; NameSectionSubsection type = static_cast<NameSectionSubsection>(name_type); if (type <= NameSectionSubsection::Last) { CALLBACK(OnNameSubsection, i, type, subsection_size); } switch (type) { case NameSectionSubsection::Module: CALLBACK(OnModuleNameSubsection, i, name_type, subsection_size); if (subsection_size) { std::string_view name; CHECK_RESULT(ReadStr(&name, "module name")); CALLBACK(OnModuleName, name); } break; case NameSectionSubsection::Function: CALLBACK(OnFunctionNameSubsection, i, name_type, subsection_size); if (subsection_size) { Index num_names; CHECK_RESULT(ReadCount(&num_names, "name count")); CALLBACK(OnFunctionNamesCount, num_names); Index last_function_index = kInvalidIndex; for (Index j = 0; j < num_names; ++j) { Index function_index; std::string_view function_name; CHECK_RESULT(ReadIndex(&function_index, "function index")); ERROR_UNLESS(function_index != last_function_index, "duplicate function name: %u", function_index); ERROR_UNLESS(last_function_index == kInvalidIndex || function_index > last_function_index, "function index out of order: %u", function_index); last_function_index = function_index; ERROR_UNLESS(function_index < NumTotalFuncs(), "invalid function index: %" PRIindex, function_index); CHECK_RESULT(ReadStr(&function_name, "function name")); CALLBACK(OnFunctionName, function_index, function_name); } } break; case NameSectionSubsection::Local: CALLBACK(OnLocalNameSubsection, i, name_type, subsection_size); if (subsection_size) { Index num_funcs; CHECK_RESULT(ReadCount(&num_funcs, "function count")); CALLBACK(OnLocalNameFunctionCount, num_funcs); Index last_function_index = kInvalidIndex; for (Index j = 0; j < num_funcs; ++j) { Index function_index; CHECK_RESULT(ReadIndex(&function_index, "function index")); ERROR_UNLESS(function_index < NumTotalFuncs(), "invalid function index: %u", function_index); ERROR_UNLESS(last_function_index == kInvalidIndex || function_index > last_function_index, "locals function index out of order: %u", function_index); last_function_index = function_index; Index num_locals; CHECK_RESULT(ReadCount(&num_locals, "local count")); CALLBACK(OnLocalNameLocalCount, function_index, num_locals); Index last_local_index = kInvalidIndex; for (Index k = 0; k < num_locals; ++k) { Index local_index; std::string_view local_name; CHECK_RESULT(ReadIndex(&local_index, "named index")); ERROR_UNLESS(local_index != last_local_index, "duplicate local index: %u", local_index); ERROR_UNLESS(last_local_index == kInvalidIndex || local_index > last_local_index, "local index out of order: %u", local_index); last_local_index = local_index; CHECK_RESULT(ReadStr(&local_name, "name")); CALLBACK(OnLocalName, function_index, local_index, local_name); } } } break; case NameSectionSubsection::Label: // TODO(sbc): Implement label names. These are slightly more complicated // since they refer to offsets in the code section / instruction stream. state_.offset = subsection_end; break; case NameSectionSubsection::Type: case NameSectionSubsection::Table: case NameSectionSubsection::Memory: case NameSectionSubsection::Global: case NameSectionSubsection::ElemSegment: case NameSectionSubsection::DataSegment: case NameSectionSubsection::Tag: if (subsection_size) { Index num_names; CHECK_RESULT(ReadCount(&num_names, "name count")); CALLBACK(OnNameCount, num_names); for (Index j = 0; j < num_names; ++j) { Index index; std::string_view name; CHECK_RESULT(ReadIndex(&index, "index")); CHECK_RESULT(ReadStr(&name, "name")); CALLBACK(OnNameEntry, type, index, name); } } state_.offset = subsection_end; break; default: // Unknown subsection, skip it. state_.offset = subsection_end; break; } ++i; ERROR_UNLESS(state_.offset == subsection_end, "unfinished sub-section (expected end: 0x%" PRIzx ")", subsection_end); } CALLBACK0(EndNamesSection); return Result::Ok; } Result BinaryReader::ReadRelocSection(Offset section_size) { CALLBACK(BeginRelocSection, section_size); uint32_t section_index; CHECK_RESULT(ReadU32Leb128(§ion_index, "section index")); Index num_relocs; CHECK_RESULT(ReadCount(&num_relocs, "relocation count")); CALLBACK(OnRelocCount, num_relocs, section_index); for (Index i = 0; i < num_relocs; ++i) { Offset offset; Index index; uint32_t reloc_type, addend = 0; CHECK_RESULT(ReadU32Leb128(&reloc_type, "relocation type")); CHECK_RESULT(ReadOffset(&offset, "offset")); CHECK_RESULT(ReadIndex(&index, "index")); RelocType type = static_cast<RelocType>(reloc_type); switch (type) { case RelocType::MemoryAddressLEB: case RelocType::MemoryAddressLEB64: case RelocType::MemoryAddressSLEB: case RelocType::MemoryAddressSLEB64: case RelocType::MemoryAddressRelSLEB: case RelocType::MemoryAddressRelSLEB64: case RelocType::MemoryAddressI32: case RelocType::MemoryAddressI64: case RelocType::MemoryAddressLocRelI32: case RelocType::FunctionOffsetI32: case RelocType::FunctionOffsetI64: case RelocType::SectionOffsetI32: case RelocType::MemoryAddressTLSSLEB: case RelocType::MemoryAddressTLSSLEB64: CHECK_RESULT(ReadS32Leb128(&addend, "addend")); break; case RelocType::FuncIndexLEB: case RelocType::FuncIndexI32: case RelocType::TableIndexSLEB: case RelocType::TableIndexSLEB64: case RelocType::TableIndexI32: case RelocType::TableIndexI64: case RelocType::TypeIndexLEB: case RelocType::GlobalIndexLEB: case RelocType::GlobalIndexI32: case RelocType::TagIndexLEB: case RelocType::TableIndexRelSLEB: case RelocType::TableIndexRelSLEB64: case RelocType::TableNumberLEB: break; default: PrintError("unknown reloc type: %s", GetRelocTypeName(type)); return Result::Error; } CALLBACK(OnReloc, type, offset, index, addend); } CALLBACK0(EndRelocSection); return Result::Ok; } Result BinaryReader::ReadDylink0Section(Offset section_size) { CALLBACK(BeginDylinkSection, section_size); while (state_.offset < read_end_) { uint32_t dylink_type; Offset subsection_size; CHECK_RESULT(ReadU32Leb128(&dylink_type, "type")); CHECK_RESULT(ReadOffset(&subsection_size, "subsection size")); size_t subsection_end = state_.offset + subsection_size; ERROR_UNLESS(subsection_end <= read_end_, "invalid sub-section size: extends past end"); ReadEndRestoreGuard guard(this); read_end_ = subsection_end; uint32_t count; switch (static_cast<DylinkEntryType>(dylink_type)) { case DylinkEntryType::MemInfo: { uint32_t mem_size; uint32_t mem_align; uint32_t table_size; uint32_t table_align; CHECK_RESULT(ReadU32Leb128(&mem_size, "mem_size")); CHECK_RESULT(ReadU32Leb128(&mem_align, "mem_align")); CHECK_RESULT(ReadU32Leb128(&table_size, "table_size")); CHECK_RESULT(ReadU32Leb128(&table_align, "table_align")); CALLBACK(OnDylinkInfo, mem_size, mem_align, table_size, table_align); break; } case DylinkEntryType::Needed: CHECK_RESULT(ReadU32Leb128(&count, "needed_dynlibs")); CALLBACK(OnDylinkNeededCount, count); while (count--) { std::string_view so_name; CHECK_RESULT(ReadStr(&so_name, "dylib so_name")); CALLBACK(OnDylinkNeeded, so_name); } break; case DylinkEntryType::ImportInfo: CHECK_RESULT(ReadU32Leb128(&count, "count")); CALLBACK(OnDylinkImportCount, count); for (Index i = 0; i < count; ++i) { uint32_t flags = 0; std::string_view module; std::string_view field; CHECK_RESULT(ReadStr(&module, "module")); CHECK_RESULT(ReadStr(&field, "field")); CHECK_RESULT(ReadU32Leb128(&flags, "flags")); CALLBACK(OnDylinkImport, module, field, flags); } break; case DylinkEntryType::ExportInfo: CHECK_RESULT(ReadU32Leb128(&count, "count")); CALLBACK(OnDylinkExportCount, count); for (Index i = 0; i < count; ++i) { uint32_t flags = 0; std::string_view name; CHECK_RESULT(ReadStr(&name, "name")); CHECK_RESULT(ReadU32Leb128(&flags, "flags")); CALLBACK(OnDylinkExport, name, flags); } break; default: // Unknown subsection, skip it. state_.offset = subsection_end; break; } ERROR_UNLESS(state_.offset == subsection_end, "unfinished sub-section (expected end: 0x%" PRIzx ")", subsection_end); } CALLBACK0(EndDylinkSection); return Result::Ok; } Result BinaryReader::ReadDylinkSection(Offset section_size) { CALLBACK(BeginDylinkSection, section_size); uint32_t mem_size; uint32_t mem_align; uint32_t table_size; uint32_t table_align; CHECK_RESULT(ReadU32Leb128(&mem_size, "mem_size")); CHECK_RESULT(ReadU32Leb128(&mem_align, "mem_align")); CHECK_RESULT(ReadU32Leb128(&table_size, "table_size")); CHECK_RESULT(ReadU32Leb128(&table_align, "table_align")); CALLBACK(OnDylinkInfo, mem_size, mem_align, table_size, table_align); uint32_t count; CHECK_RESULT(ReadU32Leb128(&count, "needed_dynlibs")); CALLBACK(OnDylinkNeededCount, count); while (count--) { std::string_view so_name; CHECK_RESULT(ReadStr(&so_name, "dylib so_name")); CALLBACK(OnDylinkNeeded, so_name); } CALLBACK0(EndDylinkSection); return Result::Ok; } Result BinaryReader::ReadTargetFeaturesSections(Offset section_size) { CALLBACK(BeginTargetFeaturesSection, section_size); uint32_t count; CHECK_RESULT(ReadU32Leb128(&count, "sym count")); CALLBACK(OnFeatureCount, count); while (count--) { uint8_t prefix; std::string_view name; CHECK_RESULT(ReadU8(&prefix, "prefix")); CHECK_RESULT(ReadStr(&name, "feature name")); CALLBACK(OnFeature, prefix, name); } CALLBACK0(EndTargetFeaturesSection); return Result::Ok; } Result BinaryReader::ReadGenericCustomSection(std::string_view name, Offset section_size) { CALLBACK(BeginGenericCustomSection, section_size); const void* data; Offset custom_data_size = read_end_ - state_.offset; CHECK_RESULT( ReadBytesWithSize(&data, custom_data_size, "custom section data")); CALLBACK(OnGenericCustomSection, name, data, custom_data_size); CALLBACK0(EndGenericCustomSection); return Result::Ok; } Result BinaryReader::ReadLinkingSection(Offset section_size) { CALLBACK(BeginLinkingSection, section_size); uint32_t version; CHECK_RESULT(ReadU32Leb128(&version, "version")); ERROR_UNLESS(version == 2, "invalid linking metadata version: %u", version); while (state_.offset < read_end_) { uint32_t linking_type; Offset subsection_size; CHECK_RESULT(ReadU32Leb128(&linking_type, "type")); CHECK_RESULT(ReadOffset(&subsection_size, "subsection size")); size_t subsection_end = state_.offset + subsection_size; ERROR_UNLESS(subsection_end <= read_end_, "invalid sub-section size: extends past end"); ReadEndRestoreGuard guard(this); read_end_ = subsection_end; uint32_t count; switch (static_cast<LinkingEntryType>(linking_type)) { case LinkingEntryType::SymbolTable: CHECK_RESULT(ReadU32Leb128(&count, "sym count")); CALLBACK(OnSymbolCount, count); for (Index i = 0; i < count; ++i) { std::string_view name; uint32_t flags = 0; uint32_t kind = 0; CHECK_RESULT(ReadU32Leb128(&kind, "sym type")); CHECK_RESULT(ReadU32Leb128(&flags, "sym flags")); SymbolType sym_type = static_cast<SymbolType>(kind); switch (sym_type) { case SymbolType::Function: case SymbolType::Global: case SymbolType::Tag: case SymbolType::Table: { uint32_t index = 0; CHECK_RESULT(ReadU32Leb128(&index, "index")); if ((flags & WABT_SYMBOL_FLAG_UNDEFINED) == 0 || (flags & WABT_SYMBOL_FLAG_EXPLICIT_NAME) != 0) CHECK_RESULT(ReadStr(&name, "symbol name")); switch (sym_type) { case SymbolType::Function: CALLBACK(OnFunctionSymbol, i, flags, name, index); break; case SymbolType::Global: CALLBACK(OnGlobalSymbol, i, flags, name, index); break; case SymbolType::Tag: CALLBACK(OnTagSymbol, i, flags, name, index); break; case SymbolType::Table: CALLBACK(OnTableSymbol, i, flags, name, index); break; default: WABT_UNREACHABLE; } break; } case SymbolType::Data: { uint32_t segment = 0; uint32_t offset = 0; uint32_t size = 0; CHECK_RESULT(ReadStr(&name, "symbol name")); if ((flags & WABT_SYMBOL_FLAG_UNDEFINED) == 0) { CHECK_RESULT(ReadU32Leb128(&segment, "segment")); CHECK_RESULT(ReadU32Leb128(&offset, "offset")); CHECK_RESULT(ReadU32Leb128(&size, "size")); } CALLBACK(OnDataSymbol, i, flags, name, segment, offset, size); break; } case SymbolType::Section: { uint32_t index = 0; CHECK_RESULT(ReadU32Leb128(&index, "index")); CALLBACK(OnSectionSymbol, i, flags, index); break; } } } break; case LinkingEntryType::SegmentInfo: CHECK_RESULT(ReadU32Leb128(&count, "info count")); CALLBACK(OnSegmentInfoCount, count); for (Index i = 0; i < count; i++) { std::string_view name; Address alignment_log2; uint32_t flags; CHECK_RESULT(ReadStr(&name, "segment name")); CHECK_RESULT(ReadAlignment(&alignment_log2, "segment alignment")); CHECK_RESULT(CheckAlignment(&alignment_log2, "segment alignment")); CHECK_RESULT(ReadU32Leb128(&flags, "segment flags")); CALLBACK(OnSegmentInfo, i, name, alignment_log2, flags); } break; case LinkingEntryType::InitFunctions: CHECK_RESULT(ReadU32Leb128(&count, "info count")); CALLBACK(OnInitFunctionCount, count); while (count--) { uint32_t priority; uint32_t symbol; CHECK_RESULT(ReadU32Leb128(&priority, "priority")); CHECK_RESULT(ReadU32Leb128(&symbol, "symbol index")); CALLBACK(OnInitFunction, priority, symbol); } break; case LinkingEntryType::ComdatInfo: CHECK_RESULT(ReadU32Leb128(&count, "count")); CALLBACK(OnComdatCount, count); while (count--) { uint32_t flags; uint32_t entry_count; std::string_view name; CHECK_RESULT(ReadStr(&name, "comdat name")); CHECK_RESULT(ReadU32Leb128(&flags, "flags")); CHECK_RESULT(ReadU32Leb128(&entry_count, "entry count")); CALLBACK(OnComdatBegin, name, flags, entry_count); while (entry_count--) { uint32_t kind; uint32_t index; CHECK_RESULT(ReadU32Leb128(&kind, "kind")); CHECK_RESULT(ReadU32Leb128(&index, "index")); ComdatType comdat_type = static_cast<ComdatType>(kind); CALLBACK(OnComdatEntry, comdat_type, index); } } break; default: // Unknown subsection, skip it. state_.offset = subsection_end; break; } ERROR_UNLESS(state_.offset == subsection_end, "unfinished sub-section (expected end: 0x%" PRIzx ")", subsection_end); } CALLBACK0(EndLinkingSection); return Result::Ok; } Result BinaryReader::ReadTagType(Index* out_sig_index) { uint8_t attribute; CHECK_RESULT(ReadU8(&attribute, "tag attribute")); ERROR_UNLESS(attribute == 0, "tag attribute must be 0"); CHECK_RESULT(ReadIndex(out_sig_index, "tag signature index")); return Result::Ok; } Result BinaryReader::ReadTagSection(Offset section_size) { CALLBACK(BeginTagSection, section_size); Index num_tags; CHECK_RESULT(ReadCount(&num_tags, "tag count")); CALLBACK(OnTagCount, num_tags); for (Index i = 0; i < num_tags; ++i) { Index tag_index = num_tag_imports_ + i; Index sig_index; CHECK_RESULT(ReadTagType(&sig_index)); CALLBACK(OnTagType, tag_index, sig_index); } CALLBACK(EndTagSection); return Result::Ok; } Result BinaryReader::ReadCodeMetadataSection(std::string_view name, Offset section_size) { CALLBACK(BeginCodeMetadataSection, name, section_size); Index num_functions; CHECK_RESULT(ReadCount(&num_functions, "function count")); CALLBACK(OnCodeMetadataFuncCount, num_functions); Index last_function_index = kInvalidIndex; for (Index i = 0; i < num_functions; ++i) { Index function_index; CHECK_RESULT(ReadCount(&function_index, "function index")); ERROR_UNLESS(function_index >= num_func_imports_, "function import can't have metadata (got %" PRIindex ")", function_index); ERROR_UNLESS(function_index < NumTotalFuncs(), "invalid function index: %" PRIindex, function_index); ERROR_UNLESS(function_index != last_function_index, "duplicate function index: %" PRIindex, function_index); ERROR_UNLESS(last_function_index == kInvalidIndex || function_index > last_function_index, "function index out of order: %" PRIindex, function_index); last_function_index = function_index; Index num_metadata; CHECK_RESULT(ReadCount(&num_metadata, "metadata instances count")); CALLBACK(OnCodeMetadataCount, function_index, num_metadata); Offset last_code_offset = kInvalidOffset; for (Index j = 0; j < num_metadata; ++j) { Offset code_offset; CHECK_RESULT(ReadOffset(&code_offset, "code offset")); ERROR_UNLESS(code_offset != last_code_offset, "duplicate code offset: %" PRIzx, code_offset); ERROR_UNLESS( last_code_offset == kInvalidOffset || code_offset > last_code_offset, "code offset out of order: %" PRIzx, code_offset); last_code_offset = code_offset; Address data_size; const void* data; CHECK_RESULT(ReadBytes(&data, &data_size, "instance data")); CALLBACK(OnCodeMetadata, code_offset, data, data_size); } } CALLBACK(EndCodeMetadataSection); return Result::Ok; } Result BinaryReader::ReadCustomSection(Index section_index, Offset section_size) { std::string_view section_name; CHECK_RESULT(ReadStr(§ion_name, "section name")); CALLBACK(BeginCustomSection, section_index, section_size, section_name); ValueRestoreGuard<bool, &BinaryReader::reading_custom_section_> guard(this); reading_custom_section_ = true; { // Backtrack parser when scope ends ValueRestoreGuard<BinaryReaderDelegate::State, &BinaryReader::state_> guard( this); CHECK_RESULT(ReadGenericCustomSection(section_name, section_size)); } if (options_.read_debug_names && section_name == WABT_BINARY_SECTION_NAME) { CHECK_RESULT(ReadNameSection(section_size)); did_read_names_section_ = true; } else if (section_name == WABT_BINARY_SECTION_DYLINK0) { CHECK_RESULT(ReadDylink0Section(section_size)); } else if (section_name == WABT_BINARY_SECTION_DYLINK) { CHECK_RESULT(ReadDylinkSection(section_size)); } else if (section_name.rfind(WABT_BINARY_SECTION_RELOC, 0) == 0) { // Reloc sections always begin with "reloc." CHECK_RESULT(ReadRelocSection(section_size)); } else if (section_name == WABT_BINARY_SECTION_TARGET_FEATURES) { CHECK_RESULT(ReadTargetFeaturesSections(section_size)); } else if (section_name == WABT_BINARY_SECTION_LINKING) { CHECK_RESULT(ReadLinkingSection(section_size)); } else if (options_.features.code_metadata_enabled() && section_name.find(WABT_BINARY_SECTION_CODE_METADATA) == 0) { std::string_view metadata_name = section_name; metadata_name.remove_prefix(sizeof(WABT_BINARY_SECTION_CODE_METADATA) - 1); CHECK_RESULT(ReadCodeMetadataSection(metadata_name, section_size)); } else { // Skip. This is a generic custom section, and is handled above. state_.offset = read_end_; } CALLBACK0(EndCustomSection); return Result::Ok; } Result BinaryReader::ReadTypeSection(Offset section_size) { CALLBACK(BeginTypeSection, section_size); Index num_signatures; CHECK_RESULT(ReadCount(&num_signatures, "type count")); CALLBACK(OnTypeCount, num_signatures); for (Index i = 0; i < num_signatures; ++i) { Type form; if (options_.features.gc_enabled()) { CHECK_RESULT(ReadType(&form, "type form")); } else { uint8_t type; CHECK_RESULT(ReadU8(&type, "type form")); ERROR_UNLESS(type == 0x60, "unexpected type form (got %#x)", type); form = Type::Func; } switch (form) { case Type::Func: { Index num_params; CHECK_RESULT(ReadCount(&num_params, "function param count")); param_types_.resize(num_params); for (Index j = 0; j < num_params; ++j) { Type param_type; CHECK_RESULT(ReadType(¶m_type, "function param type")); ERROR_UNLESS(IsConcreteType(param_type), "expected valid param type (got " PRItypecode ")", WABT_PRINTF_TYPE_CODE(param_type)); param_types_[j] = param_type; } Index num_results; CHECK_RESULT(ReadCount(&num_results, "function result count")); result_types_.resize(num_results); for (Index j = 0; j < num_results; ++j) { Type result_type; CHECK_RESULT(ReadType(&result_type, "function result type")); ERROR_UNLESS(IsConcreteType(result_type), "expected valid result type (got " PRItypecode ")", WABT_PRINTF_TYPE_CODE(result_type)); result_types_[j] = result_type; } Type* param_types = num_params ? param_types_.data() : nullptr; Type* result_types = num_results ? result_types_.data() : nullptr; CALLBACK(OnFuncType, i, num_params, param_types, num_results, result_types); break; } case Type::Struct: { ERROR_UNLESS(options_.features.gc_enabled(), "invalid type form: struct not allowed"); Index num_fields; CHECK_RESULT(ReadCount(&num_fields, "field count")); fields_.resize(num_fields); for (Index j = 0; j < num_fields; ++j) { CHECK_RESULT(ReadField(&fields_[j])); } CALLBACK(OnStructType, i, fields_.size(), fields_.data()); break; } case Type::Array: { ERROR_UNLESS(options_.features.gc_enabled(), "invalid type form: array not allowed"); TypeMut field; CHECK_RESULT(ReadField(&field)); CALLBACK(OnArrayType, i, field); break; }; default: PrintError("unexpected type form (got " PRItypecode ")", WABT_PRINTF_TYPE_CODE(form)); return Result::Error; } } CALLBACK0(EndTypeSection); return Result::Ok; } Result BinaryReader::ReadImportSection(Offset section_size) { CALLBACK(BeginImportSection, section_size); Index num_imports; CHECK_RESULT(ReadCount(&num_imports, "import count")); CALLBACK(OnImportCount, num_imports); for (Index i = 0; i < num_imports; ++i) { std::string_view module_name; CHECK_RESULT(ReadStr(&module_name, "import module name")); std::string_view field_name; CHECK_RESULT(ReadStr(&field_name, "import field name")); uint8_t kind; CHECK_RESULT(ReadU8(&kind, "import kind")); CALLBACK(OnImport, i, static_cast<ExternalKind>(kind), module_name, field_name); switch (static_cast<ExternalKind>(kind)) { case ExternalKind::Func: { Index sig_index; CHECK_RESULT(ReadIndex(&sig_index, "import signature index")); CALLBACK(OnImportFunc, i, module_name, field_name, num_func_imports_, sig_index); num_func_imports_++; break; } case ExternalKind::Table: { Type elem_type; Limits elem_limits; CHECK_RESULT(ReadTable(&elem_type, &elem_limits)); CALLBACK(OnImportTable, i, module_name, field_name, num_table_imports_, elem_type, &elem_limits); num_table_imports_++; break; } case ExternalKind::Memory: { Limits page_limits; uint32_t page_size; CHECK_RESULT(ReadMemory(&page_limits, &page_size)); CALLBACK(OnImportMemory, i, module_name, field_name, num_memory_imports_, &page_limits, page_size); num_memory_imports_++; break; } case ExternalKind::Global: { Type type; bool mutable_; CHECK_RESULT(ReadGlobalHeader(&type, &mutable_)); CALLBACK(OnImportGlobal, i, module_name, field_name, num_global_imports_, type, mutable_); num_global_imports_++; break; } case ExternalKind::Tag: { ERROR_UNLESS(options_.features.exceptions_enabled(), "invalid import tag kind: exceptions not allowed"); Index sig_index; CHECK_RESULT(ReadTagType(&sig_index)); CALLBACK(OnImportTag, i, module_name, field_name, num_tag_imports_, sig_index); num_tag_imports_++; break; } default: PrintError("malformed import kind: %d", kind); return Result::Error; } } CALLBACK0(EndImportSection); return Result::Ok; } Result BinaryReader::ReadFunctionSection(Offset section_size) { CALLBACK(BeginFunctionSection, section_size); CHECK_RESULT( ReadCount(&num_function_signatures_, "function signature count")); CALLBACK(OnFunctionCount, num_function_signatures_); for (Index i = 0; i < num_function_signatures_; ++i) { Index func_index = num_func_imports_ + i; Index sig_index; CHECK_RESULT(ReadIndex(&sig_index, "function signature index")); CALLBACK(OnFunction, func_index, sig_index); } CALLBACK0(EndFunctionSection); return Result::Ok; } Result BinaryReader::ReadTableSection(Offset section_size) { CALLBACK(BeginTableSection, section_size); Index num_tables; CHECK_RESULT(ReadCount(&num_tables, "table count")); CALLBACK(OnTableCount, num_tables); for (Index i = 0; i < num_tables; ++i) { Index table_index = num_table_imports_ + i; Type elem_type; Limits elem_limits; CHECK_RESULT(ReadTable(&elem_type, &elem_limits)); CALLBACK(OnTable, table_index, elem_type, &elem_limits); } CALLBACK0(EndTableSection); return Result::Ok; } Result BinaryReader::ReadMemorySection(Offset section_size) { CALLBACK(BeginMemorySection, section_size); Index num_memories; CHECK_RESULT(ReadCount(&num_memories, "memory count")); CALLBACK(OnMemoryCount, num_memories); for (Index i = 0; i < num_memories; ++i) { Index memory_index = num_memory_imports_ + i; Limits page_limits; uint32_t page_size; CHECK_RESULT(ReadMemory(&page_limits, &page_size)); CALLBACK(OnMemory, memory_index, &page_limits, page_size); } CALLBACK0(EndMemorySection); return Result::Ok; } Result BinaryReader::ReadGlobalSection(Offset section_size) { CALLBACK(BeginGlobalSection, section_size); Index num_globals; CHECK_RESULT(ReadCount(&num_globals, "global count")); CALLBACK(OnGlobalCount, num_globals); for (Index i = 0; i < num_globals; ++i) { Index global_index = num_global_imports_ + i; Type global_type; bool mutable_; CHECK_RESULT(ReadGlobalHeader(&global_type, &mutable_)); CALLBACK(BeginGlobal, global_index, global_type, mutable_); CALLBACK(BeginGlobalInitExpr, global_index); CHECK_RESULT(ReadInitExpr(global_index)); CALLBACK(EndGlobalInitExpr, global_index); CALLBACK(EndGlobal, global_index); } CALLBACK0(EndGlobalSection); return Result::Ok; } Result BinaryReader::ReadExportSection(Offset section_size) { CALLBACK(BeginExportSection, section_size); Index num_exports; CHECK_RESULT(ReadCount(&num_exports, "export count")); CALLBACK(OnExportCount, num_exports); for (Index i = 0; i < num_exports; ++i) { std::string_view name; CHECK_RESULT(ReadStr(&name, "export item name")); ExternalKind kind; CHECK_RESULT(ReadExternalKind(&kind, "export kind")); Index item_index; CHECK_RESULT(ReadIndex(&item_index, "export item index")); if (kind == ExternalKind::Tag) { ERROR_UNLESS(options_.features.exceptions_enabled(), "invalid export tag kind: exceptions not allowed"); } CALLBACK(OnExport, i, static_cast<ExternalKind>(kind), item_index, name); } CALLBACK0(EndExportSection); return Result::Ok; } Result BinaryReader::ReadStartSection(Offset section_size) { CALLBACK(BeginStartSection, section_size); Index func_index; CHECK_RESULT(ReadIndex(&func_index, "start function index")); CALLBACK(OnStartFunction, func_index); CALLBACK0(EndStartSection); return Result::Ok; } Result BinaryReader::ReadElemSection(Offset section_size) { CALLBACK(BeginElemSection, section_size); Index num_elem_segments; CHECK_RESULT(ReadCount(&num_elem_segments, "elem segment count")); CALLBACK(OnElemSegmentCount, num_elem_segments); for (Index i = 0; i < num_elem_segments; ++i) { uint32_t flags; CHECK_RESULT(ReadU32Leb128(&flags, "elem segment flags")); ERROR_IF(flags > SegFlagMax, "invalid elem segment flags: %#x", flags); Index table_index(0); if ((flags & (SegPassive | SegExplicitIndex)) == SegExplicitIndex) { CHECK_RESULT(ReadIndex(&table_index, "elem segment table index")); } Type elem_type = Type::FuncRef; CALLBACK(BeginElemSegment, i, table_index, flags); if (!(flags & SegPassive)) { CALLBACK(BeginElemSegmentInitExpr, i); CHECK_RESULT(ReadInitExpr(i)); CALLBACK(EndElemSegmentInitExpr, i); } // For backwards compat we support not declaring the element kind. if (flags & (SegPassive | SegExplicitIndex)) { if (flags & SegUseElemExprs) { CHECK_RESULT(ReadRefType(&elem_type, "table elem type")); } else { ExternalKind kind; CHECK_RESULT(ReadExternalKind(&kind, "export kind")); ERROR_UNLESS(kind == ExternalKind::Func, "segment elem type must be func (%s)", elem_type.GetName().c_str()); elem_type = Type::FuncRef; } } CALLBACK(OnElemSegmentElemType, i, elem_type); Index num_elem_exprs; CHECK_RESULT(ReadCount(&num_elem_exprs, "elem count")); CALLBACK(OnElemSegmentElemExprCount, i, num_elem_exprs); for (Index j = 0; j < num_elem_exprs; ++j) { CALLBACK(BeginElemExpr, i, j); if (flags & SegUseElemExprs) { CHECK_RESULT(ReadInitExpr(j)); } else { Index func_index; CHECK_RESULT(ReadIndex(&func_index, "elem expr func index")); CALLBACK(OnOpcode, Opcode::RefFunc); CALLBACK(OnRefFuncExpr, func_index); CALLBACK(OnOpcodeUint32, func_index); CALLBACK0(OnEndExpr); } CALLBACK(EndElemExpr, i, j); } CALLBACK(EndElemSegment, i); } CALLBACK0(EndElemSection); return Result::Ok; } Result BinaryReader::ReadCodeSection(Offset section_size) { CALLBACK(BeginCodeSection, section_size); CHECK_RESULT(ReadCount(&num_function_bodies_, "function body count")); ERROR_UNLESS(num_function_signatures_ == num_function_bodies_, "function signature count != function body count"); CALLBACK(OnFunctionBodyCount, num_function_bodies_); for (Index i = 0; i < num_function_bodies_; ++i) { Index func_index = num_func_imports_ + i; Offset func_offset = state_.offset; state_.offset = func_offset; uint32_t body_size; CHECK_RESULT(ReadU32Leb128(&body_size, "function body size")); Offset body_start_offset = state_.offset; Offset end_offset = body_start_offset + body_size; CALLBACK(BeginFunctionBody, func_index, body_size); uint64_t total_locals = 0; Index num_local_decls; CHECK_RESULT(ReadCount(&num_local_decls, "local declaration count")); CALLBACK(OnLocalDeclCount, num_local_decls); for (Index k = 0; k < num_local_decls; ++k) { Index num_local_types; CHECK_RESULT(ReadIndex(&num_local_types, "local type count")); total_locals += num_local_types; ERROR_UNLESS(total_locals <= UINT32_MAX, "local count must be <= 0x%x", UINT32_MAX); Type local_type; CHECK_RESULT(ReadType(&local_type, "local type")); ERROR_UNLESS(IsConcreteType(local_type), "expected valid local type"); CALLBACK(OnLocalDecl, k, num_local_types, local_type); } CALLBACK(EndLocalDecls); if (options_.skip_function_bodies) { state_.offset = end_offset; } else { CHECK_RESULT(ReadFunctionBody(end_offset)); } CALLBACK(EndFunctionBody, func_index); } CALLBACK0(EndCodeSection); return Result::Ok; } Result BinaryReader::ReadDataSection(Offset section_size) { CALLBACK(BeginDataSection, section_size); CHECK_RESULT(ReadCount(&num_data_segments_, "data segment count")); CALLBACK(OnDataSegmentCount, num_data_segments_); // If the DataCount section is not present, then data_count_ will be invalid. ERROR_UNLESS( data_count_ == kInvalidIndex || data_count_ == num_data_segments_, "data segment count does not equal count in DataCount section"); for (Index i = 0; i < num_data_segments_; ++i) { uint32_t flags; CHECK_RESULT(ReadU32Leb128(&flags, "data segment flags")); ERROR_IF(flags != 0 && !options_.features.bulk_memory_enabled(), "invalid memory index %d: bulk memory not allowed", flags); ERROR_IF(flags > SegFlagMax, "invalid data segment flags: %#x", flags); Index memory_index(0); if (flags & SegExplicitIndex) { CHECK_RESULT(ReadIndex(&memory_index, "data segment memory index")); } CALLBACK(BeginDataSegment, i, memory_index, flags); if (!(flags & SegPassive)) { CALLBACK(BeginDataSegmentInitExpr, i); CHECK_RESULT(ReadInitExpr(i)); CALLBACK(EndDataSegmentInitExpr, i); } Address data_size; const void* data; CHECK_RESULT(ReadBytes(&data, &data_size, "data segment data")); CALLBACK(OnDataSegmentData, i, data, data_size); CALLBACK(EndDataSegment, i); } CALLBACK0(EndDataSection); return Result::Ok; } Result BinaryReader::ReadDataCountSection(Offset section_size) { CALLBACK(BeginDataCountSection, section_size); Index data_count; CHECK_RESULT(ReadIndex(&data_count, "data count")); CALLBACK(OnDataCount, data_count); CALLBACK0(EndDataCountSection); data_count_ = data_count; return Result::Ok; } Result BinaryReader::ReadSections(const ReadSectionsOptions& options) { Result result = Result::Ok; Index section_index = 0; bool seen_section_code[static_cast<int>(BinarySection::Last) + 1] = {false}; for (; state_.offset < state_.size; ++section_index) { uint8_t section_code; Offset section_size; CHECK_RESULT(ReadU8(§ion_code, "section code")); CHECK_RESULT(ReadOffset(§ion_size, "section size")); ReadEndRestoreGuard guard(this); read_end_ = state_.offset + section_size; if (section_code >= kBinarySectionCount) { PrintError("invalid section code: %u", section_code); if (options.stop_on_first_error) { return Result::Error; } // If we don't have to stop on first error, continue reading // sections, because although we could not understand the // current section, we can continue and correctly parse // subsequent sections, so we can give back as much information // as we can understand. result = Result::Error; state_.offset = read_end_; continue; } BinarySection section = static_cast<BinarySection>(section_code); if (section != BinarySection::Custom) { if (seen_section_code[section_code]) { PrintError("multiple %s sections", GetSectionName(section)); return Result::Error; } seen_section_code[section_code] = true; } ERROR_UNLESS(read_end_ <= state_.size, "invalid section size: extends past end"); ERROR_UNLESS( last_known_section_ == BinarySection::Invalid || section == BinarySection::Custom || GetSectionOrder(section) > GetSectionOrder(last_known_section_), "section %s out of order", GetSectionName(section)); ERROR_UNLESS(!did_read_names_section_ || section == BinarySection::Custom, "%s section can not occur after Name section", GetSectionName(section)); CALLBACK(BeginSection, section_index, section, section_size); bool stop_on_first_error = options_.stop_on_first_error; Result section_result = Result::Error; switch (section) { case BinarySection::Custom: section_result = ReadCustomSection(section_index, section_size); if (options_.fail_on_custom_section_error) { result |= section_result; } else { stop_on_first_error = false; } break; case BinarySection::Type: section_result = ReadTypeSection(section_size); result |= section_result; break; case BinarySection::Import: section_result = ReadImportSection(section_size); result |= section_result; break; case BinarySection::Function: section_result = ReadFunctionSection(section_size); result |= section_result; break; case BinarySection::Table: section_result = ReadTableSection(section_size); result |= section_result; break; case BinarySection::Memory: section_result = ReadMemorySection(section_size); result |= section_result; break; case BinarySection::Global: section_result = ReadGlobalSection(section_size); result |= section_result; break; case BinarySection::Export: section_result = ReadExportSection(section_size); result |= section_result; break; case BinarySection::Start: section_result = ReadStartSection(section_size); result |= section_result; break; case BinarySection::Elem: section_result = ReadElemSection(section_size); result |= section_result; break; case BinarySection::Code: section_result = ReadCodeSection(section_size); result |= section_result; break; case BinarySection::Data: section_result = ReadDataSection(section_size); result |= section_result; break; case BinarySection::Tag: ERROR_UNLESS(options_.features.exceptions_enabled(), "invalid section code: %u", static_cast<unsigned int>(section)); section_result = ReadTagSection(section_size); result |= section_result; break; case BinarySection::DataCount: ERROR_UNLESS(options_.features.bulk_memory_enabled(), "invalid section code: %u", static_cast<unsigned int>(section)); section_result = ReadDataCountSection(section_size); result |= section_result; break; case BinarySection::Invalid: WABT_UNREACHABLE; } if (Succeeded(section_result) && state_.offset != read_end_) { PrintError("unfinished section (expected end: 0x%" PRIzx ")", read_end_); section_result = Result::Error; result |= section_result; } if (Failed(section_result)) { if (stop_on_first_error) { return Result::Error; } // If we're continuing after failing to read this section, move the // offset to the expected section end. This way we may be able to read // further sections. state_.offset = read_end_; } if (section != BinarySection::Custom) { last_known_section_ = section; } } return result; } Result BinaryReader::ReadModule(const ReadModuleOptions& options) { uint32_t magic = 0; CHECK_RESULT(ReadU32(&magic, "magic")); ERROR_UNLESS(magic == WABT_BINARY_MAGIC, "bad magic value"); uint32_t version = 0; CHECK_RESULT(ReadU32(&version, "version")); ERROR_UNLESS(version == WABT_BINARY_VERSION, "bad wasm file version: %#x (expected %#x)", version, WABT_BINARY_VERSION); CALLBACK(BeginModule, version); CHECK_RESULT(ReadSections(ReadSectionsOptions{options.stop_on_first_error})); // This is checked in ReadCodeSection, but it must be checked at the end too, // in case the code section was omitted. ERROR_UNLESS(num_function_signatures_ == num_function_bodies_, "function signature count != function body count"); // This is checked in ReadDataSection, but it must be checked at the end too, // in case the data section was omitted. ERROR_IF(num_data_segments_ == 0 && data_count_ != kInvalidIndex && data_count_ != 0, "Data section missing but DataCount non-zero"); CALLBACK0(EndModule); return Result::Ok; } } // end anonymous namespace Result ReadBinary(const void* data, size_t size, BinaryReaderDelegate* delegate, const ReadBinaryOptions& options) { BinaryReader reader(data, size, delegate, options); return reader.ReadModule( BinaryReader::ReadModuleOptions{options.stop_on_first_error}); } } // namespace wabt
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2026-08-25