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Support table initializer expressions; completes function references support
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‎README.md‎

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@@ -63,6 +63,7 @@ Wabt has been compiled to JavaScript via emscripten. Some of the functionality i
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| [extended-const][] | `--enable-extended-const` | | ✓ | ✓ | ✓ | ✓ | ✓ |
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| [relaxed-simd][] | `--enable-relaxed-simd` | | ✓ | ✓ | ✓ | ✓ | |
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| [custom-page-sizes][] | `--enable-custom-page-sizes`| | ✓ | ✓ | ✓ | ✓ | ✓ |
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| [function-references][] | `--enable-function-references` | | ✓ | ✓ | ✓ | ✓ | |
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[exception handling]: https://github.com/WebAssembly/exception-handling
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[mutable globals]: https://github.com/WebAssembly/mutable-global
@@ -80,6 +81,7 @@ Wabt has been compiled to JavaScript via emscripten. Some of the functionality i
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[extended-const]: https://github.com/WebAssembly/extended-const
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[relaxed-simd]: https://github.com/WebAssembly/relaxed-simd
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[custom-page-sizes]: https://github.com/WebAssembly/custom-page-sizes
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[function-references]: https://github.com/WebAssembly/function-references
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## Cloning
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‎include/wabt/binary-reader-logging.h‎

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@@ -96,9 +96,13 @@ class BinaryReaderLogging : public BinaryReaderDelegate {
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Result BeginTableSection(Offset size) override;
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Result OnTableCount(Index count) override;
99-
Result OnTable(Index index,
100-
Type elem_type,
101-
const Limits* elem_limits) override;
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Result BeginTable(Index index,
100+
Type elem_type,
101+
const Limits* elem_limits,
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TableInitExprStatus init_provided) override;
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Result BeginTableInitExpr(Index index) override;
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Result EndTableInitExpr(Index index) override;
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Result EndTable(Index index) override;
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Result EndTableSection() override;
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Result BeginMemorySection(Offset size) override;

‎include/wabt/binary-reader-nop.h‎

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@@ -121,11 +121,15 @@ class BinaryReaderNop : public BinaryReaderDelegate {
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/* Table section */
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Result BeginTableSection(Offset size) override { return Result::Ok; }
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Result OnTableCount(Index count) override { return Result::Ok; }
124-
Result OnTable(Index index,
125-
Type elem_type,
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const Limits* elem_limits) override {
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Result BeginTable(Index index,
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Type elem_type,
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const Limits* elem_limits,
127+
TableInitExprStatus init_provided) override {
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return Result::Ok;
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}
130+
Result BeginTableInitExpr(Index index) override { return Result::Ok; }
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Result EndTableInitExpr(Index index) override { return Result::Ok; }
132+
Result EndTable(Index index) override { return Result::Ok; }
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Result EndTableSection() override { return Result::Ok; }
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/* Memory section */

‎include/wabt/binary-reader.h‎

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Original file line numberDiff line numberDiff line change
@@ -66,6 +66,11 @@ struct CatchClause {
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};
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using CatchClauseVector = std::vector<CatchClause>;
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69+
enum class TableInitExprStatus {
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TableWithInitExpression,
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TableWithoutInitExpression,
72+
};
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class BinaryReaderDelegate {
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public:
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struct State {
@@ -156,9 +161,13 @@ class BinaryReaderDelegate {
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/* Table section */
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virtual Result BeginTableSection(Offset size) = 0;
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virtual Result OnTableCount(Index count) = 0;
159-
virtual Result OnTable(Index index,
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Type elem_type,
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const Limits* elem_limits) = 0;
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virtual Result BeginTable(Index index,
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Type elem_type,
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const Limits* elem_limits,
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TableInitExprStatus init_provided) = 0;
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virtual Result BeginTableInitExpr(Index index) = 0;
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virtual Result EndTableInitExpr(Index index) = 0;
170+
virtual Result EndTable(Index index) = 0;
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virtual Result EndTableSection() = 0;
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/* Memory section */

‎include/wabt/binary.h‎

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@@ -34,6 +34,7 @@
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#define WABT_BINARY_LIMITS_ALL_TABLE_FLAGS \
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(WABT_BINARY_LIMITS_HAS_MAX_FLAG | WABT_BINARY_LIMITS_IS_SHARED_FLAG | \
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WABT_BINARY_LIMITS_IS_64_FLAG)
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#define WABT_BINARY_TABLE_HAS_INIT_FUNC 0x40
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#define WABT_BINARY_SECTION_NAME "name"
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#define WABT_BINARY_SECTION_RELOC "reloc"

‎include/wabt/interp/interp-inl.h‎

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@@ -422,12 +422,6 @@ void RequireType(ValueType type) {
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assert(HasType<T>(type));
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}
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425-
inline bool TypesMatch(ValueType expected, ValueType actual) {
426-
// Currently there is no subtyping, so expected and actual must match
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// exactly. In the future this may be expanded.
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return expected == actual;
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}
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//// Value ////
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inline Value WABT_VECTORCALL Value::Make(s32 val) { Value res; res.i32_ = val; res.SetType(ValueType::I32); return res; }
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inline Value WABT_VECTORCALL Value::Make(u32 val) { Value res; res.i32_ = val; res.SetType(ValueType::I32); return res; }
@@ -682,8 +676,8 @@ inline bool Table::classof(const Object* obj) {
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}
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// static
685-
inline Table::Ptr Table::New(Store& store, TableType type) {
686-
return store.Alloc<Table>(store, type);
679+
inline Table::Ptr Table::New(Store& store, TableType type, Ref init_ref) {
680+
return store.Alloc<Table>(store, type, init_ref);
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}
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689683
inline const ExternType& Table::extern_type() {

‎include/wabt/interp/interp.h‎

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Original file line numberDiff line numberDiff line change
@@ -157,6 +157,10 @@ using u32x2 = Simd<u32, 2>;
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//// Types ////
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160+
bool TypesMatch(ValueType expected, ValueType actual);
161+
162+
//// Limits ////
163+
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bool CanGrow(const Limits&, u32 old_size, u32 delta, u32* new_size);
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Result Match(const Limits& expected,
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const Limits& actual,
@@ -334,6 +338,7 @@ struct FuncDesc {
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struct TableDesc {
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TableType type;
341+
FuncDesc init_func;
337342
};
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struct MemoryDesc {
@@ -818,7 +823,7 @@ class Table : public Extern {
818823
static const char* GetTypeName() { return "Table"; }
819824
using Ptr = RefPtr<Table>;
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821-
static Table::Ptr New(Store&, TableType);
826+
static Table::Ptr New(Store&, TableType, Ref);
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823828
Result Match(Store&, const ImportType&, Trap::Ptr* out_trap) override;
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@@ -850,7 +855,7 @@ class Table : public Extern {
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private:
852857
friend Store;
853-
explicit Table(Store&, TableType);
858+
explicit Table(Store&, TableType, Ref);
854859
void Mark(Store&) override;
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TableType type_;

‎include/wabt/ir.h‎

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@@ -987,13 +987,14 @@ struct Table {
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std::string name;
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Limits elem_limits;
989989
Type elem_type;
990+
ExprList init_expr;
990991
};
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992993
using ExprListVector = std::vector<ExprList>;
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994995
struct ElemSegment {
995996
explicit ElemSegment(std::string_view name) : name(name) {}
996-
uint8_t GetFlags(const Module*) const;
997+
uint8_t GetFlags(const Module*, bool function_references_enabled) const;
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998999
SegmentKind kind = SegmentKind::Active;
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std::string name;

‎include/wabt/shared-validator.h‎

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@@ -40,6 +40,11 @@ struct ValidateOptions {
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Features features;
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};
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43+
enum class TableImportStatus {
44+
TableIsImported,
45+
TableIsNotImported,
46+
};
47+
4348
class SharedValidator {
4449
public:
4550
WABT_DISALLOW_COPY_AND_ASSIGN(SharedValidator);
@@ -75,7 +80,7 @@ class SharedValidator {
7580
Result OnArrayType(const Location&, TypeMut field);
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Result OnFunction(const Location&, Var sig_var);
78-
Result OnTable(const Location&, Type elem_type, const Limits&);
83+
Result OnTable(const Location&, Type elem_type, const Limits&, TableImportStatus import_status, TableInitExprStatus init_provided);
7984
Result OnMemory(const Location&, const Limits&, uint32_t page_size);
8085
Result OnGlobalImport(const Location&, Type type, bool mutable_);
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Result OnGlobal(const Location&, Type type, bool mutable_);

‎src/apply-names.cc‎

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@@ -102,6 +102,7 @@ class NameApplier : public ExprVisitor::DelegateNop {
102102
Result VisitGlobal(Global* global);
103103
Result VisitTag(Tag* tag);
104104
Result VisitExport(Index export_index, Export* export_);
105+
Result VisitTable(Table* table);
105106
Result VisitElemSegment(Index elem_segment_index, ElemSegment* segment);
106107
Result VisitDataSegment(Index data_segment_index, DataSegment* segment);
107108
Result VisitStart(Var* start_var);
@@ -559,6 +560,11 @@ Result NameApplier::VisitExport(Index export_index, Export* export_) {
559560
return Result::Ok;
560561
}
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563+
Result NameApplier::VisitTable(Table* table) {
564+
CHECK_RESULT(visitor_.VisitExprList(table->init_expr));
565+
return Result::Ok;
566+
}
567+
562568
Result NameApplier::VisitElemSegment(Index elem_segment_index,
563569
ElemSegment* segment) {
564570
CHECK_RESULT(UseNameForTableVar(&segment->table_var));
@@ -594,6 +600,8 @@ Result NameApplier::VisitModule(Module* module) {
594600
CHECK_RESULT(VisitTag(module->tags[i]));
595601
for (size_t i = 0; i < module->exports.size(); ++i)
596602
CHECK_RESULT(VisitExport(i, module->exports[i]));
603+
for (size_t i = 0; i < module->tables.size(); ++i)
604+
CHECK_RESULT(VisitTable(module->tables[i]));
597605
for (size_t i = 0; i < module->elem_segments.size(); ++i)
598606
CHECK_RESULT(VisitElemSegment(i, module->elem_segments[i]));
599607
for (size_t i = 0; i < module->data_segments.size(); ++i)

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