Add m-esr52 at 52.6.0

1 files changed, 689 insertions, 0 deletions

diff --git a/js/src/wasm/WasmBinaryFormat.h b/js/src/wasm/WasmBinaryFormat.h
new file mode 100644
index 000000000..2f95ebafb
--- /dev/null
+++ b/js/src/wasm/WasmBinaryFormat.h
@@ -0,0 +1,689 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ *
+ * Copyright 2016 Mozilla Foundation
+ *
+ * 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.
+ */
+
+#ifndef wasm_binary_format_h
+#define wasm_binary_format_h
+
+#include "wasm/WasmTypes.h"
+
+namespace js {
+namespace wasm {
+
+// The Encoder class appends bytes to the Bytes object it is given during
+// construction. The client is responsible for the Bytes's lifetime and must
+// keep the Bytes alive as long as the Encoder is used.
+
+class Encoder
+{
+    Bytes& bytes_;
+
+    template <class T>
+    MOZ_MUST_USE bool write(const T& v) {
+        return bytes_.append(reinterpret_cast<const uint8_t*>(&v), sizeof(T));
+    }
+
+    template <typename UInt>
+    MOZ_MUST_USE bool writeVarU(UInt i) {
+        do {
+            uint8_t byte = i & 0x7f;
+            i >>= 7;
+            if (i != 0)
+                byte |= 0x80;
+            if (!bytes_.append(byte))
+                return false;
+        } while (i != 0);
+        return true;
+    }
+
+    template <typename SInt>
+    MOZ_MUST_USE bool writeVarS(SInt i) {
+        bool done;
+        do {
+            uint8_t byte = i & 0x7f;
+            i >>= 7;
+            done = ((i == 0) && !(byte & 0x40)) || ((i == -1) && (byte & 0x40));
+            if (!done)
+                byte |= 0x80;
+            if (!bytes_.append(byte))
+                return false;
+        } while (!done);
+        return true;
+    }
+
+    void patchVarU32(size_t offset, uint32_t patchBits, uint32_t assertBits) {
+        do {
+            uint8_t assertByte = assertBits & 0x7f;
+            uint8_t patchByte = patchBits & 0x7f;
+            assertBits >>= 7;
+            patchBits >>= 7;
+            if (assertBits != 0) {
+                assertByte |= 0x80;
+                patchByte |= 0x80;
+            }
+            MOZ_ASSERT(assertByte == bytes_[offset]);
+            bytes_[offset] = patchByte;
+            offset++;
+        } while(assertBits != 0);
+    }
+
+    void patchFixedU7(size_t offset, uint8_t patchBits, uint8_t assertBits) {
+        MOZ_ASSERT(patchBits <= uint8_t(INT8_MAX));
+        patchFixedU8(offset, patchBits, assertBits);
+    }
+
+    void patchFixedU8(size_t offset, uint8_t patchBits, uint8_t assertBits) {
+        MOZ_ASSERT(bytes_[offset] == assertBits);
+        bytes_[offset] = patchBits;
+    }
+
+    uint32_t varU32ByteLength(size_t offset) const {
+        size_t start = offset;
+        while (bytes_[offset] & 0x80)
+            offset++;
+        return offset - start + 1;
+    }
+
+  public:
+    explicit Encoder(Bytes& bytes)
+      : bytes_(bytes)
+    {
+        MOZ_ASSERT(empty());
+    }
+
+    size_t currentOffset() const { return bytes_.length(); }
+    bool empty() const { return currentOffset() == 0; }
+
+    // Fixed-size encoding operations simply copy the literal bytes (without
+    // attempting to align).
+
+    MOZ_MUST_USE bool writeFixedU7(uint8_t i) {
+        MOZ_ASSERT(i <= uint8_t(INT8_MAX));
+        return writeFixedU8(i);
+    }
+    MOZ_MUST_USE bool writeFixedU8(uint8_t i) {
+        return write<uint8_t>(i);
+    }
+    MOZ_MUST_USE bool writeFixedU32(uint32_t i) {
+        return write<uint32_t>(i);
+    }
+    MOZ_MUST_USE bool writeFixedF32(RawF32 f) {
+        return write<uint32_t>(f.bits());
+    }
+    MOZ_MUST_USE bool writeFixedF64(RawF64 d) {
+        return write<uint64_t>(d.bits());
+    }
+    MOZ_MUST_USE bool writeFixedI8x16(const I8x16& i8x16) {
+        return write<I8x16>(i8x16);
+    }
+    MOZ_MUST_USE bool writeFixedI16x8(const I16x8& i16x8) {
+        return write<I16x8>(i16x8);
+    }
+    MOZ_MUST_USE bool writeFixedI32x4(const I32x4& i32x4) {
+        return write<I32x4>(i32x4);
+    }
+    MOZ_MUST_USE bool writeFixedF32x4(const F32x4& f32x4) {
+        return write<F32x4>(f32x4);
+    }
+
+    // Variable-length encodings that all use LEB128.
+
+    MOZ_MUST_USE bool writeVarU32(uint32_t i) {
+        return writeVarU<uint32_t>(i);
+    }
+    MOZ_MUST_USE bool writeVarS32(int32_t i) {
+        return writeVarS<int32_t>(i);
+    }
+    MOZ_MUST_USE bool writeVarU64(uint64_t i) {
+        return writeVarU<uint64_t>(i);
+    }
+    MOZ_MUST_USE bool writeVarS64(int64_t i) {
+        return writeVarS<int64_t>(i);
+    }
+    MOZ_MUST_USE bool writeValType(ValType type) {
+        static_assert(size_t(TypeCode::Limit) <= UINT8_MAX, "fits");
+        MOZ_ASSERT(size_t(type) < size_t(TypeCode::Limit));
+        return writeFixedU8(uint8_t(type));
+    }
+    MOZ_MUST_USE bool writeBlockType(ExprType type) {
+        static_assert(size_t(TypeCode::Limit) <= UINT8_MAX, "fits");
+        MOZ_ASSERT(size_t(type) < size_t(TypeCode::Limit));
+        return writeFixedU8(uint8_t(type));
+    }
+    MOZ_MUST_USE bool writeOp(Op op) {
+        static_assert(size_t(Op::Limit) <= 2 * UINT8_MAX, "fits");
+        MOZ_ASSERT(size_t(op) < size_t(Op::Limit));
+        if (size_t(op) < UINT8_MAX)
+            return writeFixedU8(uint8_t(op));
+        return writeFixedU8(UINT8_MAX) &&
+               writeFixedU8(size_t(op) - UINT8_MAX);
+    }
+
+    // Fixed-length encodings that allow back-patching.
+
+    MOZ_MUST_USE bool writePatchableFixedU7(size_t* offset) {
+        *offset = bytes_.length();
+        return writeFixedU8(UINT8_MAX);
+    }
+    void patchFixedU7(size_t offset, uint8_t patchBits) {
+        return patchFixedU7(offset, patchBits, UINT8_MAX);
+    }
+
+    // Variable-length encodings that allow back-patching.
+
+    MOZ_MUST_USE bool writePatchableVarU32(size_t* offset) {
+        *offset = bytes_.length();
+        return writeVarU32(UINT32_MAX);
+    }
+    void patchVarU32(size_t offset, uint32_t patchBits) {
+        return patchVarU32(offset, patchBits, UINT32_MAX);
+    }
+
+    // Byte ranges start with an LEB128 length followed by an arbitrary sequence
+    // of bytes. When used for strings, bytes are to be interpreted as utf8.
+
+    MOZ_MUST_USE bool writeBytes(const void* bytes, uint32_t numBytes) {
+        return writeVarU32(numBytes) &&
+               bytes_.append(reinterpret_cast<const uint8_t*>(bytes), numBytes);
+    }
+
+    // A "section" is a contiguous range of bytes that stores its own size so
+    // that it may be trivially skipped without examining the contents. Sections
+    // require backpatching since the size of the section is only known at the
+    // end while the size's varU32 must be stored at the beginning. Immediately
+    // after the section length is the string id of the section.
+
+    MOZ_MUST_USE bool startSection(SectionId id, size_t* offset) {
+        MOZ_ASSERT(id != SectionId::UserDefined); // not supported yet
+
+        return writeVarU32(uint32_t(id)) &&
+               writePatchableVarU32(offset);
+    }
+    void finishSection(size_t offset) {
+        return patchVarU32(offset, bytes_.length() - offset - varU32ByteLength(offset));
+    }
+};
+
+// The Decoder class decodes the bytes in the range it is given during
+// construction. The client is responsible for keeping the byte range alive as
+// long as the Decoder is used.
+
+class Decoder
+{
+    const uint8_t* const beg_;
+    const uint8_t* const end_;
+    const uint8_t* cur_;
+    UniqueChars* error_;
+
+    template <class T>
+    MOZ_MUST_USE bool read(T* out) {
+        if (bytesRemain() < sizeof(T))
+            return false;
+        memcpy((void*)out, cur_, sizeof(T));
+        cur_ += sizeof(T);
+        return true;
+    }
+
+    template <class T>
+    T uncheckedRead() {
+        MOZ_ASSERT(bytesRemain() >= sizeof(T));
+        T ret;
+        memcpy(&ret, cur_, sizeof(T));
+        cur_ += sizeof(T);
+        return ret;
+    }
+
+    template <class T>
+    void uncheckedRead(T* ret) {
+        MOZ_ASSERT(bytesRemain() >= sizeof(T));
+        memcpy(ret, cur_, sizeof(T));
+        cur_ += sizeof(T);
+    }
+
+    template <typename UInt>
+    MOZ_MUST_USE bool readVarU(UInt* out) {
+        const unsigned numBits = sizeof(UInt) * CHAR_BIT;
+        const unsigned remainderBits = numBits % 7;
+        const unsigned numBitsInSevens = numBits - remainderBits;
+        UInt u = 0;
+        uint8_t byte;
+        UInt shift = 0;
+        do {
+            if (!readFixedU8(&byte))
+                return false;
+            if (!(byte & 0x80)) {
+                *out = u | UInt(byte) << shift;
+                return true;
+            }
+            u |= UInt(byte & 0x7F) << shift;
+            shift += 7;
+        } while (shift != numBitsInSevens);
+        if (!readFixedU8(&byte) || (byte & (unsigned(-1) << remainderBits)))
+            return false;
+        *out = u | (UInt(byte) << numBitsInSevens);
+        return true;
+    }
+
+    template <typename SInt>
+    MOZ_MUST_USE bool readVarS(SInt* out) {
+        const unsigned numBits = sizeof(SInt) * CHAR_BIT;
+        const unsigned remainderBits = numBits % 7;
+        const unsigned numBitsInSevens = numBits - remainderBits;
+        SInt s = 0;
+        uint8_t byte;
+        unsigned shift = 0;
+        do {
+            if (!readFixedU8(&byte))
+                return false;
+            s |= SInt(byte & 0x7f) << shift;
+            shift += 7;
+            if (!(byte & 0x80)) {
+                if (byte & 0x40)
+                    s |= SInt(-1) << shift;
+                *out = s;
+                return true;
+            }
+        } while (shift < numBitsInSevens);
+        if (!remainderBits || !readFixedU8(&byte) || (byte & 0x80))
+            return false;
+        uint8_t mask = 0x7f & (uint8_t(-1) << remainderBits);
+        if ((byte & mask) != ((byte & (1 << (remainderBits - 1))) ? mask : 0))
+            return false;
+        *out = s | SInt(byte) << shift;
+        return true;
+    }
+
+  public:
+    Decoder(const uint8_t* begin, const uint8_t* end, UniqueChars* error)
+      : beg_(begin),
+        end_(end),
+        cur_(begin),
+        error_(error)
+    {
+        MOZ_ASSERT(begin <= end);
+    }
+    explicit Decoder(const Bytes& bytes, UniqueChars* error = nullptr)
+      : beg_(bytes.begin()),
+        end_(bytes.end()),
+        cur_(bytes.begin()),
+        error_(error)
+    {}
+
+    bool fail(const char* msg, ...) MOZ_FORMAT_PRINTF(2, 3);
+    bool fail(UniqueChars msg);
+    void clearError() {
+        if (error_)
+            error_->reset();
+    }
+
+    bool done() const {
+        MOZ_ASSERT(cur_ <= end_);
+        return cur_ == end_;
+    }
+
+    size_t bytesRemain() const {
+        MOZ_ASSERT(end_ >= cur_);
+        return size_t(end_ - cur_);
+    }
+    // pos must be a value previously returned from currentPosition.
+    void rollbackPosition(const uint8_t* pos) {
+        cur_ = pos;
+    }
+    const uint8_t* currentPosition() const {
+        return cur_;
+    }
+    size_t currentOffset() const {
+        return cur_ - beg_;
+    }
+    const uint8_t* begin() const {
+        return beg_;
+    }
+
+    // Fixed-size encoding operations simply copy the literal bytes (without
+    // attempting to align).
+
+    MOZ_MUST_USE bool readFixedU8(uint8_t* i) {
+        return read<uint8_t>(i);
+    }
+    MOZ_MUST_USE bool readFixedU32(uint32_t* u) {
+        return read<uint32_t>(u);
+    }
+    MOZ_MUST_USE bool readFixedF32(RawF32* f) {
+        uint32_t u;
+        if (!read<uint32_t>(&u))
+            return false;
+        *f = RawF32::fromBits(u);
+        return true;
+    }
+    MOZ_MUST_USE bool readFixedF64(RawF64* d) {
+        uint64_t u;
+        if (!read<uint64_t>(&u))
+            return false;
+        *d = RawF64::fromBits(u);
+        return true;
+    }
+    MOZ_MUST_USE bool readFixedI8x16(I8x16* i8x16) {
+        return read<I8x16>(i8x16);
+    }
+    MOZ_MUST_USE bool readFixedI16x8(I16x8* i16x8) {
+        return read<I16x8>(i16x8);
+    }
+    MOZ_MUST_USE bool readFixedI32x4(I32x4* i32x4) {
+        return read<I32x4>(i32x4);
+    }
+    MOZ_MUST_USE bool readFixedF32x4(F32x4* f32x4) {
+        return read<F32x4>(f32x4);
+    }
+
+    // Variable-length encodings that all use LEB128.
+
+    MOZ_MUST_USE bool readVarU32(uint32_t* out) {
+        return readVarU<uint32_t>(out);
+    }
+    MOZ_MUST_USE bool readVarS32(int32_t* out) {
+        return readVarS<int32_t>(out);
+    }
+    MOZ_MUST_USE bool readVarU64(uint64_t* out) {
+        return readVarU<uint64_t>(out);
+    }
+    MOZ_MUST_USE bool readVarS64(int64_t* out) {
+        return readVarS<int64_t>(out);
+    }
+    MOZ_MUST_USE bool readValType(uint8_t* type) {
+        static_assert(uint8_t(TypeCode::Limit) <= UINT8_MAX, "fits");
+        return readFixedU8(type);
+    }
+    MOZ_MUST_USE bool readBlockType(uint8_t* type) {
+        static_assert(size_t(TypeCode::Limit) <= UINT8_MAX, "fits");
+        return readFixedU8(type);
+    }
+    MOZ_MUST_USE bool readOp(uint16_t* op) {
+        static_assert(size_t(Op::Limit) <= 2 * UINT8_MAX, "fits");
+        uint8_t u8;
+        if (!readFixedU8(&u8))
+            return false;
+        if (MOZ_LIKELY(u8 != UINT8_MAX)) {
+            *op = u8;
+            return true;
+        }
+        if (!readFixedU8(&u8))
+            return false;
+        *op = uint16_t(u8) + UINT8_MAX;
+        return true;
+    }
+
+    // See writeBytes comment.
+
+    MOZ_MUST_USE bool readBytes(uint32_t numBytes, const uint8_t** bytes = nullptr) {
+        if (bytes)
+            *bytes = cur_;
+        if (bytesRemain() < numBytes)
+            return false;
+        cur_ += numBytes;
+        return true;
+    }
+
+    // See "section" description in Encoder.
+
+    static const uint32_t NotStarted = UINT32_MAX;
+
+    MOZ_MUST_USE bool startSection(SectionId id,
+                                   uint32_t* startOffset,
+                                   uint32_t* size,
+                                   const char* sectionName)
+    {
+        const uint8_t* const before = cur_;
+        const uint8_t* beforeId = before;
+        uint32_t idValue;
+        if (!readVarU32(&idValue))
+            goto backup;
+        while (idValue != uint32_t(id)) {
+            if (idValue != uint32_t(SectionId::UserDefined))
+                goto backup;
+            // Rewind to the section id since skipUserDefinedSection expects it.
+            cur_ = beforeId;
+            if (!skipUserDefinedSection())
+                return false;
+            beforeId = cur_;
+            if (!readVarU32(&idValue))
+                goto backup;
+        }
+        if (!readVarU32(size))
+            goto fail;
+        if (bytesRemain() < *size)
+            goto fail;
+        *startOffset = cur_ - beg_;
+        return true;
+      backup:
+        cur_ = before;
+        *startOffset = NotStarted;
+        return true;
+      fail:
+        return fail("failed to start %s section", sectionName);
+    }
+    MOZ_MUST_USE bool finishSection(uint32_t startOffset, uint32_t size,
+                                    const char* sectionName)
+    {
+        if (size != (cur_ - beg_) - startOffset)
+            return fail("byte size mismatch in %s section", sectionName);
+        return true;
+    }
+
+    // "User sections" do not cause validation errors unless the error is in
+    // the user-defined section header itself.
+
+    MOZ_MUST_USE bool startUserDefinedSection(const char* expectedId,
+                                              size_t expectedIdSize,
+                                              uint32_t* sectionStart,
+                                              uint32_t* sectionSize)
+    {
+        const uint8_t* const before = cur_;
+        while (true) {
+            if (!startSection(SectionId::UserDefined, sectionStart, sectionSize, "user-defined"))
+                return false;
+            if (*sectionStart == NotStarted) {
+                cur_ = before;
+                return true;
+            }
+            uint32_t idSize;
+            if (!readVarU32(&idSize))
+                goto fail;
+            if (idSize > bytesRemain() || currentOffset() + idSize > *sectionStart + *sectionSize)
+                goto fail;
+            if (expectedId && (expectedIdSize != idSize || !!memcmp(cur_, expectedId, idSize))) {
+                finishUserDefinedSection(*sectionStart, *sectionSize);
+                continue;
+            }
+            cur_ += idSize;
+            return true;
+        }
+        MOZ_CRASH("unreachable");
+      fail:
+        return fail("failed to start user-defined section");
+    }
+    template <size_t IdSizeWith0>
+    MOZ_MUST_USE bool startUserDefinedSection(const char (&id)[IdSizeWith0],
+                                              uint32_t* sectionStart,
+                                              uint32_t* sectionSize)
+    {
+        MOZ_ASSERT(id[IdSizeWith0 - 1] == '\0');
+        return startUserDefinedSection(id, IdSizeWith0 - 1, sectionStart, sectionSize);
+    }
+    void finishUserDefinedSection(uint32_t sectionStart, uint32_t sectionSize) {
+        MOZ_ASSERT(cur_ >= beg_);
+        MOZ_ASSERT(cur_ <= end_);
+        cur_ = (beg_ + sectionStart) + sectionSize;
+        MOZ_ASSERT(cur_ <= end_);
+        clearError();
+    }
+    MOZ_MUST_USE bool skipUserDefinedSection() {
+        uint32_t sectionStart, sectionSize;
+        if (!startUserDefinedSection(nullptr, 0, &sectionStart, &sectionSize))
+            return false;
+        if (sectionStart == NotStarted)
+            return fail("expected user-defined section");
+        finishUserDefinedSection(sectionStart, sectionSize);
+        return true;
+    }
+
+    // The infallible "unchecked" decoding functions can be used when we are
+    // sure that the bytes are well-formed (by construction or due to previous
+    // validation).
+
+    uint8_t uncheckedReadFixedU8() {
+        return uncheckedRead<uint8_t>();
+    }
+    uint32_t uncheckedReadFixedU32() {
+        return uncheckedRead<uint32_t>();
+    }
+    RawF32 uncheckedReadFixedF32() {
+        return RawF32::fromBits(uncheckedRead<uint32_t>());
+    }
+    RawF64 uncheckedReadFixedF64() {
+        return RawF64::fromBits(uncheckedRead<uint64_t>());
+    }
+    template <typename UInt>
+    UInt uncheckedReadVarU() {
+        static const unsigned numBits = sizeof(UInt) * CHAR_BIT;
+        static const unsigned remainderBits = numBits % 7;
+        static const unsigned numBitsInSevens = numBits - remainderBits;
+        UInt decoded = 0;
+        uint32_t shift = 0;
+        do {
+            uint8_t byte = *cur_++;
+            if (!(byte & 0x80))
+                return decoded | (UInt(byte) << shift);
+            decoded |= UInt(byte & 0x7f) << shift;
+            shift += 7;
+        } while (shift != numBitsInSevens);
+        uint8_t byte = *cur_++;
+        MOZ_ASSERT(!(byte & 0xf0));
+        return decoded | (UInt(byte) << numBitsInSevens);
+    }
+    uint32_t uncheckedReadVarU32() {
+        return uncheckedReadVarU<uint32_t>();
+    }
+    int32_t uncheckedReadVarS32() {
+        int32_t i32 = 0;
+        MOZ_ALWAYS_TRUE(readVarS32(&i32));
+        return i32;
+    }
+    uint64_t uncheckedReadVarU64() {
+        return uncheckedReadVarU<uint64_t>();
+    }
+    int64_t uncheckedReadVarS64() {
+        int64_t i64 = 0;
+        MOZ_ALWAYS_TRUE(readVarS64(&i64));
+        return i64;
+    }
+    ValType uncheckedReadValType() {
+        return (ValType)uncheckedReadFixedU8();
+    }
+    Op uncheckedReadOp() {
+        static_assert(size_t(Op::Limit) <= 2 * UINT8_MAX, "fits");
+        uint8_t u8 = uncheckedReadFixedU8();
+        return u8 != UINT8_MAX
+               ? Op(u8)
+               : Op(uncheckedReadFixedU8() + UINT8_MAX);
+    }
+    void uncheckedReadFixedI8x16(I8x16* i8x16) {
+        struct T { I8x16 v; };
+        T t = uncheckedRead<T>();
+        memcpy(i8x16, &t, sizeof(t));
+    }
+    void uncheckedReadFixedI16x8(I16x8* i16x8) {
+        struct T { I16x8 v; };
+        T t = uncheckedRead<T>();
+        memcpy(i16x8, &t, sizeof(t));
+    }
+    void uncheckedReadFixedI32x4(I32x4* i32x4) {
+        struct T { I32x4 v; };
+        T t = uncheckedRead<T>();
+        memcpy(i32x4, &t, sizeof(t));
+    }
+    void uncheckedReadFixedF32x4(F32x4* f32x4) {
+        struct T { F32x4 v; };
+        T t = uncheckedRead<T>();
+        memcpy(f32x4, &t, sizeof(t));
+    }
+};
+
+// Reusable macro encoding/decoding functions reused by both the two
+// encoders (AsmJS/WasmTextToBinary) and all the decoders
+// (WasmCompile/WasmIonCompile/WasmBaselineCompile/WasmBinaryToText).
+
+// Misc helpers.
+
+UniqueChars
+DecodeName(Decoder& d);
+
+MOZ_MUST_USE bool
+DecodeTableLimits(Decoder& d, TableDescVector* tables);
+
+MOZ_MUST_USE bool
+GlobalIsJSCompatible(Decoder& d, ValType type, bool isMutable);
+
+MOZ_MUST_USE bool
+EncodeLocalEntries(Encoder& d, const ValTypeVector& locals);
+
+MOZ_MUST_USE bool
+DecodeLocalEntries(Decoder& d, ModuleKind kind, ValTypeVector* locals);
+
+MOZ_MUST_USE bool
+DecodeGlobalType(Decoder& d, ValType* type, bool* isMutable);
+
+MOZ_MUST_USE bool
+DecodeInitializerExpression(Decoder& d, const GlobalDescVector& globals, ValType expected,
+                            InitExpr* init);
+
+MOZ_MUST_USE bool
+DecodeLimits(Decoder& d, Limits* limits);
+
+MOZ_MUST_USE bool
+DecodeMemoryLimits(Decoder& d, bool hasMemory, Limits* memory);
+
+// Section macros.
+
+MOZ_MUST_USE bool
+DecodePreamble(Decoder& d);
+
+MOZ_MUST_USE bool
+DecodeTypeSection(Decoder& d, SigWithIdVector* sigs);
+
+MOZ_MUST_USE bool
+DecodeImportSection(Decoder& d, const SigWithIdVector& sigs, Uint32Vector* funcSigIndices,
+                    GlobalDescVector* globals, TableDescVector* tables, Maybe<Limits>* memory,
+                    ImportVector* imports);
+
+MOZ_MUST_USE bool
+DecodeFunctionSection(Decoder& d, const SigWithIdVector& sigs, size_t numImportedFunc,
+                      Uint32Vector* funcSigIndexes);
+
+MOZ_MUST_USE bool
+DecodeUnknownSections(Decoder& d);
+
+MOZ_MUST_USE bool
+DecodeDataSection(Decoder& d, bool usesMemory, uint32_t minMemoryByteLength,
+                  const GlobalDescVector& globals, DataSegmentVector* segments);
+
+MOZ_MUST_USE bool
+DecodeMemorySection(Decoder& d, bool hasMemory, Limits* memory, bool* present);
+
+} // namespace wasm
+} // namespace js
+
+#endif // wasm_binary_format_h