mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-23 04:06:39 +00:00
1e7b32490d
This allows for building GoToSocial with [SQLite transpiled to WASM](https://github.com/ncruces/go-sqlite3) and accessed through [Wazero](https://wazero.io/).
2341 lines
88 KiB
Go
2341 lines
88 KiB
Go
package wasm
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import (
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"bytes"
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"errors"
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"fmt"
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"strconv"
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"strings"
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"github.com/tetratelabs/wazero/api"
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"github.com/tetratelabs/wazero/experimental"
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"github.com/tetratelabs/wazero/internal/leb128"
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)
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// The wazero specific limitation described at RATIONALE.md.
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const maximumValuesOnStack = 1 << 27
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// validateFunction validates the instruction sequence of a function.
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// following the specification https://www.w3.org/TR/2019/REC-wasm-core-1-20191205/#instructions%E2%91%A2.
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//
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// * idx is the index in the FunctionSection
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// * functions are the function index, which is prefixed by imports. The value is the TypeSection index.
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// * globals are the global index, which is prefixed by imports.
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// * memory is the potentially imported memory and can be nil.
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// * table is the potentially imported table and can be nil.
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// * declaredFunctionIndexes is the set of function indexes declared by declarative element segments which can be acceed by OpcodeRefFunc instruction.
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//
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// Returns an error if the instruction sequence is not valid,
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// or potentially it can exceed the maximum number of values on the stack.
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func (m *Module) validateFunction(sts *stacks, enabledFeatures api.CoreFeatures, idx Index, functions []Index,
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globals []GlobalType, memory *Memory, tables []Table, declaredFunctionIndexes map[Index]struct{}, br *bytes.Reader,
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) error {
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return m.validateFunctionWithMaxStackValues(sts, enabledFeatures, idx, functions, globals, memory, tables, maximumValuesOnStack, declaredFunctionIndexes, br)
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}
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func readMemArg(pc uint64, body []byte) (align, offset uint32, read uint64, err error) {
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align, num, err := leb128.LoadUint32(body[pc:])
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if err != nil {
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err = fmt.Errorf("read memory align: %v", err)
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return
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}
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read += num
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offset, num, err = leb128.LoadUint32(body[pc+num:])
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if err != nil {
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err = fmt.Errorf("read memory offset: %v", err)
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return
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}
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read += num
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return align, offset, read, nil
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}
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// validateFunctionWithMaxStackValues is like validateFunction, but allows overriding maxStackValues for testing.
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//
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// * stacks is to track the state of Wasm value and control frame stacks at anypoint of execution, and reused to reduce allocation.
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// * maxStackValues is the maximum height of values stack which the target is allowed to reach.
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func (m *Module) validateFunctionWithMaxStackValues(
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sts *stacks,
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enabledFeatures api.CoreFeatures,
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idx Index,
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functions []Index,
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globals []GlobalType,
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memory *Memory,
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tables []Table,
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maxStackValues int,
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declaredFunctionIndexes map[Index]struct{},
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br *bytes.Reader,
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) error {
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nonStaticLocals := make(map[Index]struct{})
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if len(m.NonStaticLocals) > 0 {
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m.NonStaticLocals[idx] = nonStaticLocals
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}
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functionType := &m.TypeSection[m.FunctionSection[idx]]
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code := &m.CodeSection[idx]
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body := code.Body
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localTypes := code.LocalTypes
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sts.reset(functionType)
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valueTypeStack := &sts.vs
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// We start with the outermost control block which is for function return if the code branches into it.
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controlBlockStack := &sts.cs
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// Now start walking through all the instructions in the body while tracking
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// control blocks and value types to check the validity of all instructions.
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for pc := uint64(0); pc < uint64(len(body)); pc++ {
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op := body[pc]
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if false {
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var instName string
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if op == OpcodeMiscPrefix {
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instName = MiscInstructionName(body[pc+1])
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} else if op == OpcodeVecPrefix {
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instName = VectorInstructionName(body[pc+1])
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} else if op == OpcodeAtomicPrefix {
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instName = AtomicInstructionName(body[pc+1])
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} else {
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instName = InstructionName(op)
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}
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fmt.Printf("handling %s, stack=%s, blocks: %v\n", instName, valueTypeStack.stack, controlBlockStack)
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}
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if len(controlBlockStack.stack) == 0 {
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return fmt.Errorf("unexpected end of function at pc=%#x", pc)
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}
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if OpcodeI32Load <= op && op <= OpcodeI64Store32 {
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if memory == nil {
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return fmt.Errorf("memory must exist for %s", InstructionName(op))
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}
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pc++
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align, _, read, err := readMemArg(pc, body)
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if err != nil {
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return err
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}
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pc += read - 1
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switch op {
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case OpcodeI32Load:
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if 1<<align > 32/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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valueTypeStack.push(ValueTypeI32)
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case OpcodeF32Load:
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if 1<<align > 32/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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valueTypeStack.push(ValueTypeF32)
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case OpcodeI32Store:
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if 1<<align > 32/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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case OpcodeF32Store:
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if 1<<align > 32/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
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return err
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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case OpcodeI64Load:
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if 1<<align > 64/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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valueTypeStack.push(ValueTypeI64)
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case OpcodeF64Load:
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if 1<<align > 64/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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valueTypeStack.push(ValueTypeF64)
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case OpcodeI64Store:
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if 1<<align > 64/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
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return err
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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case OpcodeF64Store:
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if 1<<align > 64/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
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return err
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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case OpcodeI32Load8S:
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if 1<<align > 1 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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valueTypeStack.push(ValueTypeI32)
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case OpcodeI32Load8U:
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if 1<<align > 1 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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valueTypeStack.push(ValueTypeI32)
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case OpcodeI64Load8S, OpcodeI64Load8U:
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if 1<<align > 1 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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valueTypeStack.push(ValueTypeI64)
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case OpcodeI32Store8:
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if 1<<align > 1 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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case OpcodeI64Store8:
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if 1<<align > 1 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
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return err
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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case OpcodeI32Load16S, OpcodeI32Load16U:
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if 1<<align > 16/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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valueTypeStack.push(ValueTypeI32)
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case OpcodeI64Load16S, OpcodeI64Load16U:
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if 1<<align > 16/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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valueTypeStack.push(ValueTypeI64)
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case OpcodeI32Store16:
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if 1<<align > 16/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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case OpcodeI64Store16:
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if 1<<align > 16/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
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return err
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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case OpcodeI64Load32S, OpcodeI64Load32U:
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if 1<<align > 32/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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valueTypeStack.push(ValueTypeI64)
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case OpcodeI64Store32:
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if 1<<align > 32/8 {
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return fmt.Errorf("invalid memory alignment")
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
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return err
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}
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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}
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} else if OpcodeMemorySize <= op && op <= OpcodeMemoryGrow {
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if memory == nil {
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return fmt.Errorf("memory must exist for %s", InstructionName(op))
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}
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pc++
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val, num, err := leb128.LoadUint32(body[pc:])
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if err != nil {
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return fmt.Errorf("read immediate: %v", err)
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}
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if val != 0 || num != 1 {
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return fmt.Errorf("memory instruction reserved bytes not zero with 1 byte")
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}
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switch Opcode(op) {
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case OpcodeMemoryGrow:
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return err
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}
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valueTypeStack.push(ValueTypeI32)
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case OpcodeMemorySize:
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valueTypeStack.push(ValueTypeI32)
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}
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pc += num - 1
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} else if OpcodeI32Const <= op && op <= OpcodeF64Const {
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pc++
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switch Opcode(op) {
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case OpcodeI32Const:
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_, num, err := leb128.LoadInt32(body[pc:])
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if err != nil {
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return fmt.Errorf("read i32 immediate: %s", err)
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}
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pc += num - 1
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valueTypeStack.push(ValueTypeI32)
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case OpcodeI64Const:
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_, num, err := leb128.LoadInt64(body[pc:])
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if err != nil {
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return fmt.Errorf("read i64 immediate: %v", err)
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}
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valueTypeStack.push(ValueTypeI64)
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pc += num - 1
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case OpcodeF32Const:
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valueTypeStack.push(ValueTypeF32)
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pc += 3
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case OpcodeF64Const:
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valueTypeStack.push(ValueTypeF64)
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pc += 7
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}
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} else if OpcodeLocalGet <= op && op <= OpcodeGlobalSet {
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pc++
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index, num, err := leb128.LoadUint32(body[pc:])
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if err != nil {
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return fmt.Errorf("read immediate: %v", err)
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}
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pc += num - 1
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switch op {
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case OpcodeLocalGet:
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inputLen := uint32(len(functionType.Params))
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if l := uint32(len(localTypes)) + inputLen; index >= l {
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return fmt.Errorf("invalid local index for %s %d >= %d(=len(locals)+len(parameters))",
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OpcodeLocalGetName, index, l)
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}
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if index < inputLen {
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valueTypeStack.push(functionType.Params[index])
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} else {
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valueTypeStack.push(localTypes[index-inputLen])
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}
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case OpcodeLocalSet:
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inputLen := uint32(len(functionType.Params))
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if l := uint32(len(localTypes)) + inputLen; index >= l {
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return fmt.Errorf("invalid local index for %s %d >= %d(=len(locals)+len(parameters))",
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OpcodeLocalSetName, index, l)
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}
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nonStaticLocals[index] = struct{}{}
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var expType ValueType
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if index < inputLen {
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expType = functionType.Params[index]
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} else {
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expType = localTypes[index-inputLen]
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}
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if err := valueTypeStack.popAndVerifyType(expType); err != nil {
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return err
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}
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case OpcodeLocalTee:
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inputLen := uint32(len(functionType.Params))
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if l := uint32(len(localTypes)) + inputLen; index >= l {
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return fmt.Errorf("invalid local index for %s %d >= %d(=len(locals)+len(parameters))",
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OpcodeLocalTeeName, index, l)
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}
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nonStaticLocals[index] = struct{}{}
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var expType ValueType
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if index < inputLen {
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expType = functionType.Params[index]
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} else {
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expType = localTypes[index-inputLen]
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}
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if err := valueTypeStack.popAndVerifyType(expType); err != nil {
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return err
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}
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valueTypeStack.push(expType)
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case OpcodeGlobalGet:
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if index >= uint32(len(globals)) {
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return fmt.Errorf("invalid index for %s", OpcodeGlobalGetName)
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}
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valueTypeStack.push(globals[index].ValType)
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case OpcodeGlobalSet:
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if index >= uint32(len(globals)) {
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return fmt.Errorf("invalid global index")
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} else if !globals[index].Mutable {
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return fmt.Errorf("%s when not mutable", OpcodeGlobalSetName)
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} else if err := valueTypeStack.popAndVerifyType(
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globals[index].ValType); err != nil {
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return err
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}
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}
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} else if op == OpcodeBr {
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pc++
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index, num, err := leb128.LoadUint32(body[pc:])
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if err != nil {
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return fmt.Errorf("read immediate: %v", err)
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} else if int(index) >= len(controlBlockStack.stack) {
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return fmt.Errorf("invalid %s operation: index out of range", OpcodeBrName)
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}
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pc += num - 1
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// Check type soundness.
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target := &controlBlockStack.stack[len(controlBlockStack.stack)-int(index)-1]
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var targetResultType []ValueType
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if target.op == OpcodeLoop {
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targetResultType = target.blockType.Params
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} else {
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targetResultType = target.blockType.Results
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}
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if err = valueTypeStack.popResults(op, targetResultType, false); err != nil {
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return err
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}
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// br instruction is stack-polymorphic.
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valueTypeStack.unreachable()
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} else if op == OpcodeBrIf {
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pc++
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index, num, err := leb128.LoadUint32(body[pc:])
|
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if err != nil {
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return fmt.Errorf("read immediate: %v", err)
|
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} else if int(index) >= len(controlBlockStack.stack) {
|
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return fmt.Errorf(
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"invalid ln param given for %s: index=%d with %d for the current label stack length",
|
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OpcodeBrIfName, index, len(controlBlockStack.stack))
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}
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pc += num - 1
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
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return fmt.Errorf("cannot pop the required operand for %s", OpcodeBrIfName)
|
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}
|
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// Check type soundness.
|
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target := &controlBlockStack.stack[len(controlBlockStack.stack)-int(index)-1]
|
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var targetResultType []ValueType
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if target.op == OpcodeLoop {
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targetResultType = target.blockType.Params
|
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} else {
|
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targetResultType = target.blockType.Results
|
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}
|
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if err := valueTypeStack.popResults(op, targetResultType, false); err != nil {
|
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return err
|
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}
|
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// Push back the result
|
|
for _, t := range targetResultType {
|
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valueTypeStack.push(t)
|
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}
|
|
} else if op == OpcodeBrTable {
|
|
pc++
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br.Reset(body[pc:])
|
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nl, num, err := leb128.DecodeUint32(br)
|
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if err != nil {
|
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return fmt.Errorf("read immediate: %w", err)
|
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}
|
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|
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list := make([]uint32, nl)
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for i := uint32(0); i < nl; i++ {
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l, n, err := leb128.DecodeUint32(br)
|
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if err != nil {
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return fmt.Errorf("read immediate: %w", err)
|
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}
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num += n
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list[i] = l
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}
|
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ln, n, err := leb128.DecodeUint32(br)
|
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if err != nil {
|
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return fmt.Errorf("read immediate: %w", err)
|
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} else if int(ln) >= len(controlBlockStack.stack) {
|
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return fmt.Errorf(
|
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"invalid ln param given for %s: ln=%d with %d for the current label stack length",
|
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OpcodeBrTableName, ln, len(controlBlockStack.stack))
|
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}
|
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pc += n + num - 1
|
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// Check type soundness.
|
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if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
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return fmt.Errorf("cannot pop the required operand for %s", OpcodeBrTableName)
|
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}
|
|
lnLabel := &controlBlockStack.stack[len(controlBlockStack.stack)-1-int(ln)]
|
|
var defaultLabelType []ValueType
|
|
// Below, we might modify the slice in case of unreachable. Therefore,
|
|
// we have to copy the content of block result types, otherwise the original
|
|
// function type might result in invalid value types if the block is the outermost label
|
|
// which equals the function's type.
|
|
if lnLabel.op != OpcodeLoop { // Loop operation doesn't require results since the continuation is the beginning of the loop.
|
|
defaultLabelType = make([]ValueType, len(lnLabel.blockType.Results))
|
|
copy(defaultLabelType, lnLabel.blockType.Results)
|
|
} else {
|
|
defaultLabelType = make([]ValueType, len(lnLabel.blockType.Params))
|
|
copy(defaultLabelType, lnLabel.blockType.Params)
|
|
}
|
|
|
|
if enabledFeatures.IsEnabled(api.CoreFeatureReferenceTypes) {
|
|
// As of reference-types proposal, br_table on unreachable state
|
|
// can choose unknown types for expected parameter types for each label.
|
|
// https://github.com/WebAssembly/reference-types/pull/116
|
|
for i := range defaultLabelType {
|
|
index := len(defaultLabelType) - 1 - i
|
|
exp := defaultLabelType[index]
|
|
actual, err := valueTypeStack.pop()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if actual == valueTypeUnknown {
|
|
// Re-assign the expected type to unknown.
|
|
defaultLabelType[index] = valueTypeUnknown
|
|
} else if actual != exp {
|
|
return typeMismatchError(true, OpcodeBrTableName, actual, exp, i)
|
|
}
|
|
}
|
|
} else {
|
|
if err = valueTypeStack.popResults(op, defaultLabelType, false); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
for _, l := range list {
|
|
if int(l) >= len(controlBlockStack.stack) {
|
|
return fmt.Errorf("invalid l param given for %s", OpcodeBrTableName)
|
|
}
|
|
label := &controlBlockStack.stack[len(controlBlockStack.stack)-1-int(l)]
|
|
var tableLabelType []ValueType
|
|
if label.op != OpcodeLoop {
|
|
tableLabelType = label.blockType.Results
|
|
} else {
|
|
tableLabelType = label.blockType.Params
|
|
}
|
|
if len(defaultLabelType) != len(tableLabelType) {
|
|
return fmt.Errorf("inconsistent block type length for %s at %d; %v (ln=%d) != %v (l=%d)", OpcodeBrTableName, l, defaultLabelType, ln, tableLabelType, l)
|
|
}
|
|
for i := range defaultLabelType {
|
|
if defaultLabelType[i] != valueTypeUnknown && defaultLabelType[i] != tableLabelType[i] {
|
|
return fmt.Errorf("incosistent block type for %s at %d", OpcodeBrTableName, l)
|
|
}
|
|
}
|
|
}
|
|
|
|
// br_table instruction is stack-polymorphic.
|
|
valueTypeStack.unreachable()
|
|
} else if op == OpcodeCall {
|
|
pc++
|
|
index, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("read immediate: %v", err)
|
|
}
|
|
pc += num - 1
|
|
if int(index) >= len(functions) {
|
|
return fmt.Errorf("invalid function index")
|
|
}
|
|
funcType := &m.TypeSection[functions[index]]
|
|
for i := 0; i < len(funcType.Params); i++ {
|
|
if err := valueTypeStack.popAndVerifyType(funcType.Params[len(funcType.Params)-1-i]); err != nil {
|
|
return fmt.Errorf("type mismatch on %s operation param type: %v", OpcodeCallName, err)
|
|
}
|
|
}
|
|
for _, exp := range funcType.Results {
|
|
valueTypeStack.push(exp)
|
|
}
|
|
} else if op == OpcodeCallIndirect {
|
|
pc++
|
|
typeIndex, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("read immediate: %v", err)
|
|
}
|
|
pc += num
|
|
|
|
if int(typeIndex) >= len(m.TypeSection) {
|
|
return fmt.Errorf("invalid type index at %s: %d", OpcodeCallIndirectName, typeIndex)
|
|
}
|
|
|
|
tableIndex, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("read table index: %v", err)
|
|
}
|
|
pc += num - 1
|
|
if tableIndex != 0 {
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
|
|
return fmt.Errorf("table index must be zero but was %d: %w", tableIndex, err)
|
|
}
|
|
}
|
|
|
|
if tableIndex >= uint32(len(tables)) {
|
|
return fmt.Errorf("unknown table index: %d", tableIndex)
|
|
}
|
|
|
|
table := tables[tableIndex]
|
|
if table.Type != RefTypeFuncref {
|
|
return fmt.Errorf("table is not funcref type but was %s for %s", RefTypeName(table.Type), OpcodeCallIndirectName)
|
|
}
|
|
|
|
if err = valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the offset in table for %s", OpcodeCallIndirectName)
|
|
}
|
|
funcType := &m.TypeSection[typeIndex]
|
|
for i := 0; i < len(funcType.Params); i++ {
|
|
if err = valueTypeStack.popAndVerifyType(funcType.Params[len(funcType.Params)-1-i]); err != nil {
|
|
return fmt.Errorf("type mismatch on %s operation input type", OpcodeCallIndirectName)
|
|
}
|
|
}
|
|
for _, exp := range funcType.Results {
|
|
valueTypeStack.push(exp)
|
|
}
|
|
} else if OpcodeI32Eqz <= op && op <= OpcodeI64Extend32S {
|
|
switch op {
|
|
case OpcodeI32Eqz:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeI32EqzName, err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeI32Eq, OpcodeI32Ne, OpcodeI32LtS,
|
|
OpcodeI32LtU, OpcodeI32GtS, OpcodeI32GtU, OpcodeI32LeS,
|
|
OpcodeI32LeU, OpcodeI32GeS, OpcodeI32GeU:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the 1st i32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the 2nd i32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeI64Eqz:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeI64EqzName, err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeI64Eq, OpcodeI64Ne, OpcodeI64LtS,
|
|
OpcodeI64LtU, OpcodeI64GtS, OpcodeI64GtU,
|
|
OpcodeI64LeS, OpcodeI64LeU, OpcodeI64GeS, OpcodeI64GeU:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return fmt.Errorf("cannot pop the 1st i64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return fmt.Errorf("cannot pop the 2nd i64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeF32Eq, OpcodeF32Ne, OpcodeF32Lt, OpcodeF32Gt, OpcodeF32Le, OpcodeF32Ge:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
|
|
return fmt.Errorf("cannot pop the 1st f32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
|
|
return fmt.Errorf("cannot pop the 2nd f32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeF64Eq, OpcodeF64Ne, OpcodeF64Lt, OpcodeF64Gt, OpcodeF64Le, OpcodeF64Ge:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
|
|
return fmt.Errorf("cannot pop the 1st f64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
|
|
return fmt.Errorf("cannot pop the 2nd f64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeI32Clz, OpcodeI32Ctz, OpcodeI32Popcnt:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the i32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeI32Add, OpcodeI32Sub, OpcodeI32Mul, OpcodeI32DivS,
|
|
OpcodeI32DivU, OpcodeI32RemS, OpcodeI32RemU, OpcodeI32And,
|
|
OpcodeI32Or, OpcodeI32Xor, OpcodeI32Shl, OpcodeI32ShrS,
|
|
OpcodeI32ShrU, OpcodeI32Rotl, OpcodeI32Rotr:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the 1st operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the 2nd operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeI64Clz, OpcodeI64Ctz, OpcodeI64Popcnt:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return fmt.Errorf("cannot pop the i64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeI64Add, OpcodeI64Sub, OpcodeI64Mul, OpcodeI64DivS,
|
|
OpcodeI64DivU, OpcodeI64RemS, OpcodeI64RemU, OpcodeI64And,
|
|
OpcodeI64Or, OpcodeI64Xor, OpcodeI64Shl, OpcodeI64ShrS,
|
|
OpcodeI64ShrU, OpcodeI64Rotl, OpcodeI64Rotr:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return fmt.Errorf("cannot pop the 1st i64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return fmt.Errorf("cannot pop the 2nd i64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeF32Abs, OpcodeF32Neg, OpcodeF32Ceil,
|
|
OpcodeF32Floor, OpcodeF32Trunc, OpcodeF32Nearest,
|
|
OpcodeF32Sqrt:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
|
|
return fmt.Errorf("cannot pop the 1st f32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF32)
|
|
case OpcodeF32Add, OpcodeF32Sub, OpcodeF32Mul,
|
|
OpcodeF32Div, OpcodeF32Min, OpcodeF32Max,
|
|
OpcodeF32Copysign:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
|
|
return fmt.Errorf("cannot pop the 1st f32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
|
|
return fmt.Errorf("cannot pop the 2nd f32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF32)
|
|
case OpcodeF64Abs, OpcodeF64Neg, OpcodeF64Ceil,
|
|
OpcodeF64Floor, OpcodeF64Trunc, OpcodeF64Nearest,
|
|
OpcodeF64Sqrt:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
|
|
return fmt.Errorf("cannot pop the 1st f64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF64)
|
|
case OpcodeF64Add, OpcodeF64Sub, OpcodeF64Mul,
|
|
OpcodeF64Div, OpcodeF64Min, OpcodeF64Max,
|
|
OpcodeF64Copysign:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
|
|
return fmt.Errorf("cannot pop the 1st f64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
|
|
return fmt.Errorf("cannot pop the 2nd f64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF64)
|
|
case OpcodeI32WrapI64:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeI32WrapI64Name, err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeI32TruncF32S, OpcodeI32TruncF32U:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
|
|
return fmt.Errorf("cannot pop the f32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeI32TruncF64S, OpcodeI32TruncF64U:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
|
|
return fmt.Errorf("cannot pop the f64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeI64ExtendI32S, OpcodeI64ExtendI32U:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the i32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeI64TruncF32S, OpcodeI64TruncF32U:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
|
|
return fmt.Errorf("cannot pop the f32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeI64TruncF64S, OpcodeI64TruncF64U:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
|
|
return fmt.Errorf("cannot pop the f64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeF32ConvertI32S, OpcodeF32ConvertI32U:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the i32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF32)
|
|
case OpcodeF32ConvertI64S, OpcodeF32ConvertI64U:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return fmt.Errorf("cannot pop the i64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF32)
|
|
case OpcodeF32DemoteF64:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeF32DemoteF64Name, err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF32)
|
|
case OpcodeF64ConvertI32S, OpcodeF64ConvertI32U:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the i32 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF64)
|
|
case OpcodeF64ConvertI64S, OpcodeF64ConvertI64U:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return fmt.Errorf("cannot pop the i64 operand for %s: %v", InstructionName(op), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF64)
|
|
case OpcodeF64PromoteF32:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeF64PromoteF32Name, err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF64)
|
|
case OpcodeI32ReinterpretF32:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeI32ReinterpretF32Name, err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeI64ReinterpretF64:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeF64); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeI64ReinterpretF64Name, err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeF32ReinterpretI32:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeF32ReinterpretI32Name, err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF32)
|
|
case OpcodeF64ReinterpretI64:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeF64ReinterpretI64Name, err)
|
|
}
|
|
valueTypeStack.push(ValueTypeF64)
|
|
case OpcodeI32Extend8S, OpcodeI32Extend16S:
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureSignExtensionOps); err != nil {
|
|
return fmt.Errorf("%s invalid as %v", instructionNames[op], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", instructionNames[op], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeI64Extend8S, OpcodeI64Extend16S, OpcodeI64Extend32S:
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureSignExtensionOps); err != nil {
|
|
return fmt.Errorf("%s invalid as %v", instructionNames[op], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", instructionNames[op], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
default:
|
|
return fmt.Errorf("invalid numeric instruction 0x%x", op)
|
|
}
|
|
} else if op >= OpcodeRefNull && op <= OpcodeRefFunc {
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
|
|
return fmt.Errorf("%s invalid as %v", instructionNames[op], err)
|
|
}
|
|
switch op {
|
|
case OpcodeRefNull:
|
|
pc++
|
|
switch reftype := body[pc]; reftype {
|
|
case ValueTypeExternref:
|
|
valueTypeStack.push(ValueTypeExternref)
|
|
case ValueTypeFuncref:
|
|
valueTypeStack.push(ValueTypeFuncref)
|
|
default:
|
|
return fmt.Errorf("unknown type for ref.null: 0x%x", reftype)
|
|
}
|
|
case OpcodeRefIsNull:
|
|
tp, err := valueTypeStack.pop()
|
|
if err != nil {
|
|
return fmt.Errorf("cannot pop the operand for ref.is_null: %v", err)
|
|
} else if !isReferenceValueType(tp) && tp != valueTypeUnknown {
|
|
return fmt.Errorf("type mismatch: expected reference type but was %s", ValueTypeName(tp))
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeRefFunc:
|
|
pc++
|
|
index, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read function index for ref.func: %v", err)
|
|
}
|
|
if _, ok := declaredFunctionIndexes[index]; !ok {
|
|
return fmt.Errorf("undeclared function index %d for ref.func", index)
|
|
}
|
|
pc += num - 1
|
|
valueTypeStack.push(ValueTypeFuncref)
|
|
}
|
|
} else if op == OpcodeTableGet || op == OpcodeTableSet {
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
|
|
return fmt.Errorf("%s is invalid as %v", InstructionName(op), err)
|
|
}
|
|
pc++
|
|
tableIndex, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("read immediate: %v", err)
|
|
}
|
|
if tableIndex >= uint32(len(tables)) {
|
|
return fmt.Errorf("table of index %d not found", tableIndex)
|
|
}
|
|
|
|
refType := tables[tableIndex].Type
|
|
if op == OpcodeTableGet {
|
|
if err := valueTypeStack.popAndVerifyType(api.ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for table.get: %v", err)
|
|
}
|
|
valueTypeStack.push(refType)
|
|
} else {
|
|
if err := valueTypeStack.popAndVerifyType(refType); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for table.set: %v", err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(api.ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for table.set: %v", err)
|
|
}
|
|
}
|
|
pc += num - 1
|
|
} else if op == OpcodeMiscPrefix {
|
|
pc++
|
|
// A misc opcode is encoded as an unsigned variable 32-bit integer.
|
|
miscOp32, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read misc opcode: %v", err)
|
|
}
|
|
pc += num - 1
|
|
miscOpcode := byte(miscOp32)
|
|
// If the misc opcode is beyond byte range, it is highly likely this is an invalid binary, or
|
|
// it is due to the new opcode from a new proposal. In the latter case, we have to
|
|
// change the alias type of OpcodeMisc (which is currently byte) to uint32.
|
|
if uint32(byte(miscOp32)) != miscOp32 {
|
|
return fmt.Errorf("invalid misc opcode: %#x", miscOp32)
|
|
}
|
|
if miscOpcode >= OpcodeMiscI32TruncSatF32S && miscOpcode <= OpcodeMiscI64TruncSatF64U {
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureNonTrappingFloatToIntConversion); err != nil {
|
|
return fmt.Errorf("%s invalid as %v", miscInstructionNames[miscOpcode], err)
|
|
}
|
|
var inType, outType ValueType
|
|
switch miscOpcode {
|
|
case OpcodeMiscI32TruncSatF32S, OpcodeMiscI32TruncSatF32U:
|
|
inType, outType = ValueTypeF32, ValueTypeI32
|
|
case OpcodeMiscI32TruncSatF64S, OpcodeMiscI32TruncSatF64U:
|
|
inType, outType = ValueTypeF64, ValueTypeI32
|
|
case OpcodeMiscI64TruncSatF32S, OpcodeMiscI64TruncSatF32U:
|
|
inType, outType = ValueTypeF32, ValueTypeI64
|
|
case OpcodeMiscI64TruncSatF64S, OpcodeMiscI64TruncSatF64U:
|
|
inType, outType = ValueTypeF64, ValueTypeI64
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(inType); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", miscInstructionNames[miscOpcode], err)
|
|
}
|
|
valueTypeStack.push(outType)
|
|
} else if miscOpcode >= OpcodeMiscMemoryInit && miscOpcode <= OpcodeMiscTableCopy {
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureBulkMemoryOperations); err != nil {
|
|
return fmt.Errorf("%s invalid as %v", miscInstructionNames[miscOpcode], err)
|
|
}
|
|
var params []ValueType
|
|
// Handle opcodes added in bulk-memory-operations/WebAssembly 2.0.
|
|
switch miscOpcode {
|
|
case OpcodeMiscDataDrop:
|
|
if m.DataCountSection == nil {
|
|
return fmt.Errorf("%s requires data count section", MiscInstructionName(miscOpcode))
|
|
}
|
|
|
|
// We need to read the index to the data section.
|
|
pc++
|
|
index, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read data segment index for %s: %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
if int(index) >= len(m.DataSection) {
|
|
return fmt.Errorf("index %d out of range of data section(len=%d)", index, len(m.DataSection))
|
|
}
|
|
pc += num - 1
|
|
case OpcodeMiscMemoryInit, OpcodeMiscMemoryCopy, OpcodeMiscMemoryFill:
|
|
if memory == nil {
|
|
return fmt.Errorf("memory must exist for %s", MiscInstructionName(miscOpcode))
|
|
}
|
|
params = []ValueType{ValueTypeI32, ValueTypeI32, ValueTypeI32}
|
|
|
|
if miscOpcode == OpcodeMiscMemoryInit {
|
|
if m.DataCountSection == nil {
|
|
return fmt.Errorf("%s requires data count section", MiscInstructionName(miscOpcode))
|
|
}
|
|
|
|
// We need to read the index to the data section.
|
|
pc++
|
|
index, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read data segment index for %s: %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
if int(index) >= len(m.DataSection) {
|
|
return fmt.Errorf("index %d out of range of data section(len=%d)", index, len(m.DataSection))
|
|
}
|
|
pc += num - 1
|
|
}
|
|
|
|
pc++
|
|
val, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read memory index for %s: %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
if val != 0 || num != 1 {
|
|
return fmt.Errorf("%s reserved byte must be zero encoded with 1 byte", MiscInstructionName(miscOpcode))
|
|
}
|
|
if miscOpcode == OpcodeMiscMemoryCopy {
|
|
pc++
|
|
// memory.copy needs two memory index which are reserved as zero.
|
|
val, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read memory index for %s: %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
if val != 0 || num != 1 {
|
|
return fmt.Errorf("%s reserved byte must be zero encoded with 1 byte", MiscInstructionName(miscOpcode))
|
|
}
|
|
}
|
|
|
|
case OpcodeMiscTableInit:
|
|
params = []ValueType{ValueTypeI32, ValueTypeI32, ValueTypeI32}
|
|
pc++
|
|
elementIndex, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read element segment index for %s: %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
if int(elementIndex) >= len(m.ElementSection) {
|
|
return fmt.Errorf("index %d out of range of element section(len=%d)", elementIndex, len(m.ElementSection))
|
|
}
|
|
pc += num
|
|
|
|
tableIndex, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read source table index for %s: %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
if tableIndex != 0 {
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
|
|
return fmt.Errorf("source table index must be zero for %s as %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
}
|
|
if tableIndex >= uint32(len(tables)) {
|
|
return fmt.Errorf("table of index %d not found", tableIndex)
|
|
}
|
|
|
|
if m.ElementSection[elementIndex].Type != tables[tableIndex].Type {
|
|
return fmt.Errorf("type mismatch for table.init: element type %s does not match table type %s",
|
|
RefTypeName(m.ElementSection[elementIndex].Type),
|
|
RefTypeName(tables[tableIndex].Type),
|
|
)
|
|
}
|
|
pc += num - 1
|
|
case OpcodeMiscElemDrop:
|
|
pc++
|
|
elementIndex, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read element segment index for %s: %v", MiscInstructionName(miscOpcode), err)
|
|
} else if int(elementIndex) >= len(m.ElementSection) {
|
|
return fmt.Errorf("index %d out of range of element section(len=%d)", elementIndex, len(m.ElementSection))
|
|
}
|
|
pc += num - 1
|
|
case OpcodeMiscTableCopy:
|
|
params = []ValueType{ValueTypeI32, ValueTypeI32, ValueTypeI32}
|
|
pc++
|
|
|
|
dstTableIndex, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read destination table index for %s: %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
if dstTableIndex != 0 {
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
|
|
return fmt.Errorf("destination table index must be zero for %s as %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
}
|
|
if dstTableIndex >= uint32(len(tables)) {
|
|
return fmt.Errorf("table of index %d not found", dstTableIndex)
|
|
}
|
|
pc += num
|
|
|
|
srcTableIndex, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read source table index for %s: %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
if srcTableIndex != 0 {
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
|
|
return fmt.Errorf("source table index must be zero for %s as %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
}
|
|
if srcTableIndex >= uint32(len(tables)) {
|
|
return fmt.Errorf("table of index %d not found", srcTableIndex)
|
|
}
|
|
|
|
if tables[srcTableIndex].Type != tables[dstTableIndex].Type {
|
|
return fmt.Errorf("table type mismatch for table.copy: %s (src) != %s (dst)",
|
|
RefTypeName(tables[srcTableIndex].Type), RefTypeName(tables[dstTableIndex].Type))
|
|
}
|
|
|
|
pc += num - 1
|
|
}
|
|
for _, p := range params {
|
|
if err := valueTypeStack.popAndVerifyType(p); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", miscInstructionNames[miscOpcode], err)
|
|
}
|
|
}
|
|
} else if miscOpcode >= OpcodeMiscTableGrow && miscOpcode <= OpcodeMiscTableFill {
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
|
|
return fmt.Errorf("%s invalid as %v", miscInstructionNames[miscOpcode], err)
|
|
}
|
|
|
|
pc++
|
|
tableIndex, num, err := leb128.LoadUint32(body[pc:])
|
|
if err != nil {
|
|
return fmt.Errorf("failed to read table index for %s: %v", MiscInstructionName(miscOpcode), err)
|
|
}
|
|
if tableIndex >= uint32(len(tables)) {
|
|
return fmt.Errorf("table of index %d not found", tableIndex)
|
|
}
|
|
pc += num - 1
|
|
|
|
var params, results []ValueType
|
|
reftype := tables[tableIndex].Type
|
|
if miscOpcode == OpcodeMiscTableGrow {
|
|
params = []ValueType{ValueTypeI32, reftype}
|
|
results = []ValueType{ValueTypeI32}
|
|
} else if miscOpcode == OpcodeMiscTableSize {
|
|
results = []ValueType{ValueTypeI32}
|
|
} else if miscOpcode == OpcodeMiscTableFill {
|
|
params = []ValueType{ValueTypeI32, reftype, ValueTypeI32}
|
|
}
|
|
|
|
for _, p := range params {
|
|
if err := valueTypeStack.popAndVerifyType(p); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", miscInstructionNames[miscOpcode], err)
|
|
}
|
|
}
|
|
for _, r := range results {
|
|
valueTypeStack.push(r)
|
|
}
|
|
} else {
|
|
return fmt.Errorf("unknown misc opcode %#x", miscOpcode)
|
|
}
|
|
} else if op == OpcodeVecPrefix {
|
|
pc++
|
|
// Vector instructions come with two bytes where the first byte is always OpcodeVecPrefix,
|
|
// and the second byte determines the actual instruction.
|
|
vecOpcode := body[pc]
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureSIMD); err != nil {
|
|
return fmt.Errorf("%s invalid as %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
|
|
switch vecOpcode {
|
|
case OpcodeVecV128Const:
|
|
// Read 128-bit = 16 bytes constants
|
|
if int(pc+16) >= len(body) {
|
|
return fmt.Errorf("cannot read constant vector value for %s", vectorInstructionName[vecOpcode])
|
|
}
|
|
pc += 16
|
|
valueTypeStack.push(ValueTypeV128)
|
|
case OpcodeVecV128AnyTrue, OpcodeVecI8x16AllTrue, OpcodeVecI16x8AllTrue, OpcodeVecI32x4AllTrue, OpcodeVecI64x2AllTrue,
|
|
OpcodeVecI8x16BitMask, OpcodeVecI16x8BitMask, OpcodeVecI32x4BitMask, OpcodeVecI64x2BitMask:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeVecV128Load, OpcodeVecV128Load8x8s, OpcodeVecV128Load8x8u, OpcodeVecV128Load16x4s, OpcodeVecV128Load16x4u,
|
|
OpcodeVecV128Load32x2s, OpcodeVecV128Load32x2u, OpcodeVecV128Load8Splat, OpcodeVecV128Load16Splat,
|
|
OpcodeVecV128Load32Splat, OpcodeVecV128Load64Splat,
|
|
OpcodeVecV128Load32zero, OpcodeVecV128Load64zero:
|
|
if memory == nil {
|
|
return fmt.Errorf("memory must exist for %s", VectorInstructionName(vecOpcode))
|
|
}
|
|
pc++
|
|
align, _, read, err := readMemArg(pc, body)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
pc += read - 1
|
|
var maxAlign uint32
|
|
switch vecOpcode {
|
|
case OpcodeVecV128Load:
|
|
maxAlign = 128 / 8
|
|
case OpcodeVecV128Load8x8s, OpcodeVecV128Load8x8u, OpcodeVecV128Load16x4s, OpcodeVecV128Load16x4u,
|
|
OpcodeVecV128Load32x2s, OpcodeVecV128Load32x2u:
|
|
maxAlign = 64 / 8
|
|
case OpcodeVecV128Load8Splat:
|
|
maxAlign = 1
|
|
case OpcodeVecV128Load16Splat:
|
|
maxAlign = 16 / 8
|
|
case OpcodeVecV128Load32Splat:
|
|
maxAlign = 32 / 8
|
|
case OpcodeVecV128Load64Splat:
|
|
maxAlign = 64 / 8
|
|
case OpcodeVecV128Load32zero:
|
|
maxAlign = 32 / 8
|
|
case OpcodeVecV128Load64zero:
|
|
maxAlign = 64 / 8
|
|
}
|
|
|
|
if 1<<align > maxAlign {
|
|
return fmt.Errorf("invalid memory alignment %d for %s", align, VectorInstructionName(vecOpcode))
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", VectorInstructionName(vecOpcode), err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
case OpcodeVecV128Store:
|
|
if memory == nil {
|
|
return fmt.Errorf("memory must exist for %s", VectorInstructionName(vecOpcode))
|
|
}
|
|
pc++
|
|
align, _, read, err := readMemArg(pc, body)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
pc += read - 1
|
|
if 1<<align > 128/8 {
|
|
return fmt.Errorf("invalid memory alignment %d for %s", align, OpcodeVecV128StoreName)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeVecV128StoreName, err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", OpcodeVecV128StoreName, err)
|
|
}
|
|
case OpcodeVecV128Load8Lane, OpcodeVecV128Load16Lane, OpcodeVecV128Load32Lane, OpcodeVecV128Load64Lane:
|
|
if memory == nil {
|
|
return fmt.Errorf("memory must exist for %s", VectorInstructionName(vecOpcode))
|
|
}
|
|
attr := vecLoadLanes[vecOpcode]
|
|
pc++
|
|
align, _, read, err := readMemArg(pc, body)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if 1<<align > attr.alignMax {
|
|
return fmt.Errorf("invalid memory alignment %d for %s", align, vectorInstructionName[vecOpcode])
|
|
}
|
|
pc += read
|
|
if pc >= uint64(len(body)) {
|
|
return fmt.Errorf("lane for %s not found", OpcodeVecV128Load64LaneName)
|
|
}
|
|
lane := body[pc]
|
|
if lane >= attr.laneCeil {
|
|
return fmt.Errorf("invalid lane index %d >= %d for %s", lane, attr.laneCeil, vectorInstructionName[vecOpcode])
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
case OpcodeVecV128Store8Lane, OpcodeVecV128Store16Lane, OpcodeVecV128Store32Lane, OpcodeVecV128Store64Lane:
|
|
if memory == nil {
|
|
return fmt.Errorf("memory must exist for %s", VectorInstructionName(vecOpcode))
|
|
}
|
|
attr := vecStoreLanes[vecOpcode]
|
|
pc++
|
|
align, _, read, err := readMemArg(pc, body)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if 1<<align > attr.alignMax {
|
|
return fmt.Errorf("invalid memory alignment %d for %s", align, vectorInstructionName[vecOpcode])
|
|
}
|
|
pc += read
|
|
if pc >= uint64(len(body)) {
|
|
return fmt.Errorf("lane for %s not found", vectorInstructionName[vecOpcode])
|
|
}
|
|
lane := body[pc]
|
|
if lane >= attr.laneCeil {
|
|
return fmt.Errorf("invalid lane index %d >= %d for %s", lane, attr.laneCeil, vectorInstructionName[vecOpcode])
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
case OpcodeVecI8x16ExtractLaneS,
|
|
OpcodeVecI8x16ExtractLaneU,
|
|
OpcodeVecI16x8ExtractLaneS,
|
|
OpcodeVecI16x8ExtractLaneU,
|
|
OpcodeVecI32x4ExtractLane,
|
|
OpcodeVecI64x2ExtractLane,
|
|
OpcodeVecF32x4ExtractLane,
|
|
OpcodeVecF64x2ExtractLane:
|
|
pc++
|
|
if pc >= uint64(len(body)) {
|
|
return fmt.Errorf("lane for %s not found", vectorInstructionName[vecOpcode])
|
|
}
|
|
attr := vecExtractLanes[vecOpcode]
|
|
lane := body[pc]
|
|
if lane >= attr.laneCeil {
|
|
return fmt.Errorf("invalid lane index %d >= %d for %s", lane, attr.laneCeil, vectorInstructionName[vecOpcode])
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(attr.resultType)
|
|
case OpcodeVecI8x16ReplaceLane, OpcodeVecI16x8ReplaceLane, OpcodeVecI32x4ReplaceLane,
|
|
OpcodeVecI64x2ReplaceLane, OpcodeVecF32x4ReplaceLane, OpcodeVecF64x2ReplaceLane:
|
|
pc++
|
|
if pc >= uint64(len(body)) {
|
|
return fmt.Errorf("lane for %s not found", vectorInstructionName[vecOpcode])
|
|
}
|
|
attr := vecReplaceLanes[vecOpcode]
|
|
lane := body[pc]
|
|
if lane >= attr.laneCeil {
|
|
return fmt.Errorf("invalid lane index %d >= %d for %s", lane, attr.laneCeil, vectorInstructionName[vecOpcode])
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(attr.paramType); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
case OpcodeVecI8x16Splat, OpcodeVecI16x8Splat, OpcodeVecI32x4Splat,
|
|
OpcodeVecI64x2Splat, OpcodeVecF32x4Splat, OpcodeVecF64x2Splat:
|
|
tp := vecSplatValueTypes[vecOpcode]
|
|
if err := valueTypeStack.popAndVerifyType(tp); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
case OpcodeVecI8x16Swizzle, OpcodeVecV128And, OpcodeVecV128Or, OpcodeVecV128Xor, OpcodeVecV128AndNot:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
case OpcodeVecV128Bitselect:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
case OpcodeVecV128Not:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
case OpcodeVecV128i8x16Shuffle:
|
|
pc++
|
|
if pc+15 >= uint64(len(body)) {
|
|
return fmt.Errorf("16 lane indexes for %s not found", vectorInstructionName[vecOpcode])
|
|
}
|
|
lanes := body[pc : pc+16]
|
|
for i, l := range lanes {
|
|
if l >= 32 {
|
|
return fmt.Errorf("invalid lane index[%d] %d >= %d for %s", i, l, 32, vectorInstructionName[vecOpcode])
|
|
}
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
pc += 15
|
|
case OpcodeVecI8x16Shl, OpcodeVecI8x16ShrS, OpcodeVecI8x16ShrU,
|
|
OpcodeVecI16x8Shl, OpcodeVecI16x8ShrS, OpcodeVecI16x8ShrU,
|
|
OpcodeVecI32x4Shl, OpcodeVecI32x4ShrS, OpcodeVecI32x4ShrU,
|
|
OpcodeVecI64x2Shl, OpcodeVecI64x2ShrS, OpcodeVecI64x2ShrU:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
case OpcodeVecI8x16Eq, OpcodeVecI8x16Ne, OpcodeVecI8x16LtS, OpcodeVecI8x16LtU, OpcodeVecI8x16GtS,
|
|
OpcodeVecI8x16GtU, OpcodeVecI8x16LeS, OpcodeVecI8x16LeU, OpcodeVecI8x16GeS, OpcodeVecI8x16GeU,
|
|
OpcodeVecI16x8Eq, OpcodeVecI16x8Ne, OpcodeVecI16x8LtS, OpcodeVecI16x8LtU, OpcodeVecI16x8GtS,
|
|
OpcodeVecI16x8GtU, OpcodeVecI16x8LeS, OpcodeVecI16x8LeU, OpcodeVecI16x8GeS, OpcodeVecI16x8GeU,
|
|
OpcodeVecI32x4Eq, OpcodeVecI32x4Ne, OpcodeVecI32x4LtS, OpcodeVecI32x4LtU, OpcodeVecI32x4GtS,
|
|
OpcodeVecI32x4GtU, OpcodeVecI32x4LeS, OpcodeVecI32x4LeU, OpcodeVecI32x4GeS, OpcodeVecI32x4GeU,
|
|
OpcodeVecI64x2Eq, OpcodeVecI64x2Ne, OpcodeVecI64x2LtS, OpcodeVecI64x2GtS, OpcodeVecI64x2LeS,
|
|
OpcodeVecI64x2GeS, OpcodeVecF32x4Eq, OpcodeVecF32x4Ne, OpcodeVecF32x4Lt, OpcodeVecF32x4Gt,
|
|
OpcodeVecF32x4Le, OpcodeVecF32x4Ge, OpcodeVecF64x2Eq, OpcodeVecF64x2Ne, OpcodeVecF64x2Lt,
|
|
OpcodeVecF64x2Gt, OpcodeVecF64x2Le, OpcodeVecF64x2Ge,
|
|
OpcodeVecI32x4DotI16x8S,
|
|
OpcodeVecI8x16NarrowI16x8S, OpcodeVecI8x16NarrowI16x8U, OpcodeVecI16x8NarrowI32x4S, OpcodeVecI16x8NarrowI32x4U:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
case OpcodeVecI8x16Neg, OpcodeVecI16x8Neg, OpcodeVecI32x4Neg, OpcodeVecI64x2Neg, OpcodeVecF32x4Neg, OpcodeVecF64x2Neg,
|
|
OpcodeVecF32x4Sqrt, OpcodeVecF64x2Sqrt,
|
|
OpcodeVecI8x16Abs, OpcodeVecI8x16Popcnt, OpcodeVecI16x8Abs, OpcodeVecI32x4Abs, OpcodeVecI64x2Abs,
|
|
OpcodeVecF32x4Abs, OpcodeVecF64x2Abs,
|
|
OpcodeVecF32x4Ceil, OpcodeVecF32x4Floor, OpcodeVecF32x4Trunc, OpcodeVecF32x4Nearest,
|
|
OpcodeVecF64x2Ceil, OpcodeVecF64x2Floor, OpcodeVecF64x2Trunc, OpcodeVecF64x2Nearest,
|
|
OpcodeVecI16x8ExtendLowI8x16S, OpcodeVecI16x8ExtendHighI8x16S, OpcodeVecI16x8ExtendLowI8x16U, OpcodeVecI16x8ExtendHighI8x16U,
|
|
OpcodeVecI32x4ExtendLowI16x8S, OpcodeVecI32x4ExtendHighI16x8S, OpcodeVecI32x4ExtendLowI16x8U, OpcodeVecI32x4ExtendHighI16x8U,
|
|
OpcodeVecI64x2ExtendLowI32x4S, OpcodeVecI64x2ExtendHighI32x4S, OpcodeVecI64x2ExtendLowI32x4U, OpcodeVecI64x2ExtendHighI32x4U,
|
|
OpcodeVecI16x8ExtaddPairwiseI8x16S, OpcodeVecI16x8ExtaddPairwiseI8x16U,
|
|
OpcodeVecI32x4ExtaddPairwiseI16x8S, OpcodeVecI32x4ExtaddPairwiseI16x8U,
|
|
OpcodeVecF64x2PromoteLowF32x4Zero, OpcodeVecF32x4DemoteF64x2Zero,
|
|
OpcodeVecF32x4ConvertI32x4S, OpcodeVecF32x4ConvertI32x4U,
|
|
OpcodeVecF64x2ConvertLowI32x4S, OpcodeVecF64x2ConvertLowI32x4U,
|
|
OpcodeVecI32x4TruncSatF32x4S, OpcodeVecI32x4TruncSatF32x4U, OpcodeVecI32x4TruncSatF64x2SZero, OpcodeVecI32x4TruncSatF64x2UZero:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
|
|
case OpcodeVecI8x16Add, OpcodeVecI8x16AddSatS, OpcodeVecI8x16AddSatU, OpcodeVecI8x16Sub, OpcodeVecI8x16SubSatS, OpcodeVecI8x16SubSatU,
|
|
OpcodeVecI16x8Add, OpcodeVecI16x8AddSatS, OpcodeVecI16x8AddSatU, OpcodeVecI16x8Sub, OpcodeVecI16x8SubSatS, OpcodeVecI16x8SubSatU, OpcodeVecI16x8Mul,
|
|
OpcodeVecI32x4Add, OpcodeVecI32x4Sub, OpcodeVecI32x4Mul,
|
|
OpcodeVecI64x2Add, OpcodeVecI64x2Sub, OpcodeVecI64x2Mul,
|
|
OpcodeVecF32x4Add, OpcodeVecF32x4Sub, OpcodeVecF32x4Mul, OpcodeVecF32x4Div,
|
|
OpcodeVecF64x2Add, OpcodeVecF64x2Sub, OpcodeVecF64x2Mul, OpcodeVecF64x2Div,
|
|
OpcodeVecI8x16MinS, OpcodeVecI8x16MinU, OpcodeVecI8x16MaxS, OpcodeVecI8x16MaxU,
|
|
OpcodeVecI8x16AvgrU,
|
|
OpcodeVecI16x8MinS, OpcodeVecI16x8MinU, OpcodeVecI16x8MaxS, OpcodeVecI16x8MaxU,
|
|
OpcodeVecI16x8AvgrU,
|
|
OpcodeVecI32x4MinS, OpcodeVecI32x4MinU, OpcodeVecI32x4MaxS, OpcodeVecI32x4MaxU,
|
|
OpcodeVecF32x4Min, OpcodeVecF32x4Max, OpcodeVecF64x2Min, OpcodeVecF64x2Max,
|
|
OpcodeVecF32x4Pmin, OpcodeVecF32x4Pmax, OpcodeVecF64x2Pmin, OpcodeVecF64x2Pmax,
|
|
OpcodeVecI16x8Q15mulrSatS,
|
|
OpcodeVecI16x8ExtMulLowI8x16S, OpcodeVecI16x8ExtMulHighI8x16S, OpcodeVecI16x8ExtMulLowI8x16U, OpcodeVecI16x8ExtMulHighI8x16U,
|
|
OpcodeVecI32x4ExtMulLowI16x8S, OpcodeVecI32x4ExtMulHighI16x8S, OpcodeVecI32x4ExtMulLowI16x8U, OpcodeVecI32x4ExtMulHighI16x8U,
|
|
OpcodeVecI64x2ExtMulLowI32x4S, OpcodeVecI64x2ExtMulHighI32x4S, OpcodeVecI64x2ExtMulLowI32x4U, OpcodeVecI64x2ExtMulHighI32x4U:
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeV128); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for %s: %v", vectorInstructionName[vecOpcode], err)
|
|
}
|
|
valueTypeStack.push(ValueTypeV128)
|
|
default:
|
|
return fmt.Errorf("unknown SIMD instruction %s", vectorInstructionName[vecOpcode])
|
|
}
|
|
} else if op == OpcodeBlock {
|
|
br.Reset(body[pc+1:])
|
|
bt, num, err := DecodeBlockType(m.TypeSection, br, enabledFeatures)
|
|
if err != nil {
|
|
return fmt.Errorf("read block: %w", err)
|
|
}
|
|
controlBlockStack.push(pc, 0, 0, bt, num, 0)
|
|
if err = valueTypeStack.popParams(op, bt.Params, false); err != nil {
|
|
return err
|
|
}
|
|
// Plus we have to push any block params again.
|
|
for _, p := range bt.Params {
|
|
valueTypeStack.push(p)
|
|
}
|
|
valueTypeStack.pushStackLimit(len(bt.Params))
|
|
pc += num
|
|
} else if op == OpcodeAtomicPrefix {
|
|
pc++
|
|
// Atomic instructions come with two bytes where the first byte is always OpcodeAtomicPrefix,
|
|
// and the second byte determines the actual instruction.
|
|
atomicOpcode := body[pc]
|
|
if err := enabledFeatures.RequireEnabled(experimental.CoreFeaturesThreads); err != nil {
|
|
return fmt.Errorf("%s invalid as %v", atomicInstructionName[atomicOpcode], err)
|
|
}
|
|
pc++
|
|
|
|
if atomicOpcode == OpcodeAtomicFence {
|
|
// No memory requirement and no arguments or return, however the immediate byte value must be 0.
|
|
imm := body[pc]
|
|
if imm != 0x0 {
|
|
return fmt.Errorf("invalid immediate value for %s", AtomicInstructionName(atomicOpcode))
|
|
}
|
|
continue
|
|
}
|
|
|
|
// All atomic operations except fence (checked above) require memory
|
|
if memory == nil {
|
|
return fmt.Errorf("memory must exist for %s", AtomicInstructionName(atomicOpcode))
|
|
}
|
|
align, _, read, err := readMemArg(pc, body)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
pc += read - 1
|
|
switch atomicOpcode {
|
|
case OpcodeAtomicMemoryNotify:
|
|
if 1<<align > 32/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicMemoryWait32:
|
|
if 1<<align > 32/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicMemoryWait64:
|
|
if 1<<align > 64/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicI32Load:
|
|
if 1<<align > 32/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicI64Load:
|
|
if 1<<align > 64/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeAtomicI32Load8U:
|
|
if 1<<align != 1 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicI32Load16U:
|
|
if 1<<align != 16/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicI64Load8U:
|
|
if 1<<align != 1 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeAtomicI64Load16U:
|
|
if 1<<align > 16/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeAtomicI64Load32U:
|
|
if 1<<align > 32/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeAtomicI32Store:
|
|
if 1<<align > 32/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
case OpcodeAtomicI64Store:
|
|
if 1<<align > 64/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
case OpcodeAtomicI32Store8:
|
|
if 1<<align > 1 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
case OpcodeAtomicI32Store16:
|
|
if 1<<align > 16/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
case OpcodeAtomicI64Store8:
|
|
if 1<<align > 1 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
case OpcodeAtomicI64Store16:
|
|
if 1<<align > 16/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
case OpcodeAtomicI64Store32:
|
|
if 1<<align > 32/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
case OpcodeAtomicI32RmwAdd, OpcodeAtomicI32RmwSub, OpcodeAtomicI32RmwAnd, OpcodeAtomicI32RmwOr, OpcodeAtomicI32RmwXor, OpcodeAtomicI32RmwXchg:
|
|
if 1<<align > 32/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicI32Rmw8AddU, OpcodeAtomicI32Rmw8SubU, OpcodeAtomicI32Rmw8AndU, OpcodeAtomicI32Rmw8OrU, OpcodeAtomicI32Rmw8XorU, OpcodeAtomicI32Rmw8XchgU:
|
|
if 1<<align > 1 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicI32Rmw16AddU, OpcodeAtomicI32Rmw16SubU, OpcodeAtomicI32Rmw16AndU, OpcodeAtomicI32Rmw16OrU, OpcodeAtomicI32Rmw16XorU, OpcodeAtomicI32Rmw16XchgU:
|
|
if 1<<align > 16/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicI64RmwAdd, OpcodeAtomicI64RmwSub, OpcodeAtomicI64RmwAnd, OpcodeAtomicI64RmwOr, OpcodeAtomicI64RmwXor, OpcodeAtomicI64RmwXchg:
|
|
if 1<<align > 64/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeAtomicI64Rmw8AddU, OpcodeAtomicI64Rmw8SubU, OpcodeAtomicI64Rmw8AndU, OpcodeAtomicI64Rmw8OrU, OpcodeAtomicI64Rmw8XorU, OpcodeAtomicI64Rmw8XchgU:
|
|
if 1<<align > 1 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeAtomicI64Rmw16AddU, OpcodeAtomicI64Rmw16SubU, OpcodeAtomicI64Rmw16AndU, OpcodeAtomicI64Rmw16OrU, OpcodeAtomicI64Rmw16XorU, OpcodeAtomicI64Rmw16XchgU:
|
|
if 1<<align > 16/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeAtomicI64Rmw32AddU, OpcodeAtomicI64Rmw32SubU, OpcodeAtomicI64Rmw32AndU, OpcodeAtomicI64Rmw32OrU, OpcodeAtomicI64Rmw32XorU, OpcodeAtomicI64Rmw32XchgU:
|
|
if 1<<align > 32/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeAtomicI32RmwCmpxchg:
|
|
if 1<<align > 32/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicI32Rmw8CmpxchgU:
|
|
if 1<<align > 1 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicI32Rmw16CmpxchgU:
|
|
if 1<<align > 16/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI32)
|
|
case OpcodeAtomicI64RmwCmpxchg:
|
|
if 1<<align > 64/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeAtomicI64Rmw8CmpxchgU:
|
|
if 1<<align > 1 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeAtomicI64Rmw16CmpxchgU:
|
|
if 1<<align > 16/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
case OpcodeAtomicI64Rmw32CmpxchgU:
|
|
if 1<<align > 32/8 {
|
|
return fmt.Errorf("invalid memory alignment")
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI64); err != nil {
|
|
return err
|
|
}
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return err
|
|
}
|
|
valueTypeStack.push(ValueTypeI64)
|
|
default:
|
|
return fmt.Errorf("invalid atomic opcode: 0x%x", atomicOpcode)
|
|
}
|
|
} else if op == OpcodeLoop {
|
|
br.Reset(body[pc+1:])
|
|
bt, num, err := DecodeBlockType(m.TypeSection, br, enabledFeatures)
|
|
if err != nil {
|
|
return fmt.Errorf("read block: %w", err)
|
|
}
|
|
controlBlockStack.push(pc, 0, 0, bt, num, op)
|
|
if err = valueTypeStack.popParams(op, bt.Params, false); err != nil {
|
|
return err
|
|
}
|
|
// Plus we have to push any block params again.
|
|
for _, p := range bt.Params {
|
|
valueTypeStack.push(p)
|
|
}
|
|
valueTypeStack.pushStackLimit(len(bt.Params))
|
|
pc += num
|
|
} else if op == OpcodeIf {
|
|
br.Reset(body[pc+1:])
|
|
bt, num, err := DecodeBlockType(m.TypeSection, br, enabledFeatures)
|
|
if err != nil {
|
|
return fmt.Errorf("read block: %w", err)
|
|
}
|
|
controlBlockStack.push(pc, 0, 0, bt, num, op)
|
|
if err = valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("cannot pop the operand for 'if': %v", err)
|
|
}
|
|
if err = valueTypeStack.popParams(op, bt.Params, false); err != nil {
|
|
return err
|
|
}
|
|
// Plus we have to push any block params again.
|
|
for _, p := range bt.Params {
|
|
valueTypeStack.push(p)
|
|
}
|
|
valueTypeStack.pushStackLimit(len(bt.Params))
|
|
pc += num
|
|
} else if op == OpcodeElse {
|
|
bl := &controlBlockStack.stack[len(controlBlockStack.stack)-1]
|
|
if bl.op != OpcodeIf {
|
|
return fmt.Errorf("else instruction must be used in if block: %#x", pc)
|
|
}
|
|
bl.op = OpcodeElse
|
|
bl.elseAt = pc
|
|
// Check the type soundness of the instructions *before* entering this else Op.
|
|
if err := valueTypeStack.popResults(OpcodeIf, bl.blockType.Results, true); err != nil {
|
|
return err
|
|
}
|
|
// Before entering instructions inside else, we pop all the values pushed by then block.
|
|
valueTypeStack.resetAtStackLimit()
|
|
// Plus we have to push any block params again.
|
|
for _, p := range bl.blockType.Params {
|
|
valueTypeStack.push(p)
|
|
}
|
|
} else if op == OpcodeEnd {
|
|
bl := controlBlockStack.pop()
|
|
bl.endAt = pc
|
|
|
|
// OpcodeEnd can end a block or the function itself. Check to see what it is:
|
|
|
|
ifMissingElse := bl.op == OpcodeIf && bl.elseAt <= bl.startAt
|
|
if ifMissingElse {
|
|
// If this is the end of block without else, the number of block's results and params must be same.
|
|
// Otherwise, the value stack would result in the inconsistent state at runtime.
|
|
if !bytes.Equal(bl.blockType.Results, bl.blockType.Params) {
|
|
return typeCountError(false, OpcodeElseName, bl.blockType.Params, bl.blockType.Results)
|
|
}
|
|
// -1 skips else, to handle if block without else properly.
|
|
bl.elseAt = bl.endAt - 1
|
|
}
|
|
|
|
// Determine the block context
|
|
ctx := "" // the outer-most block: the function return
|
|
if bl.op == OpcodeIf && !ifMissingElse && bl.elseAt > 0 {
|
|
ctx = OpcodeElseName
|
|
} else if bl.op != 0 {
|
|
ctx = InstructionName(bl.op)
|
|
}
|
|
|
|
// Check return types match
|
|
if err := valueTypeStack.requireStackValues(false, ctx, bl.blockType.Results, true); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Put the result types at the end after resetting at the stack limit
|
|
// since we might have Any type between the limit and the current top.
|
|
valueTypeStack.resetAtStackLimit()
|
|
for _, exp := range bl.blockType.Results {
|
|
valueTypeStack.push(exp)
|
|
}
|
|
// We exit if/loop/block, so reset the constraints on the stack manipulation
|
|
// on values previously pushed by outer blocks.
|
|
valueTypeStack.popStackLimit()
|
|
} else if op == OpcodeReturn {
|
|
// Same formatting as OpcodeEnd on the outer-most block
|
|
if err := valueTypeStack.requireStackValues(false, "", functionType.Results, false); err != nil {
|
|
return err
|
|
}
|
|
// return instruction is stack-polymorphic.
|
|
valueTypeStack.unreachable()
|
|
} else if op == OpcodeDrop {
|
|
_, err := valueTypeStack.pop()
|
|
if err != nil {
|
|
return fmt.Errorf("invalid drop: %v", err)
|
|
}
|
|
} else if op == OpcodeSelect || op == OpcodeTypedSelect {
|
|
if err := valueTypeStack.popAndVerifyType(ValueTypeI32); err != nil {
|
|
return fmt.Errorf("type mismatch on 3rd select operand: %v", err)
|
|
}
|
|
v1, err := valueTypeStack.pop()
|
|
if err != nil {
|
|
return fmt.Errorf("invalid select: %v", err)
|
|
}
|
|
v2, err := valueTypeStack.pop()
|
|
if err != nil {
|
|
return fmt.Errorf("invalid select: %v", err)
|
|
}
|
|
|
|
if op == OpcodeTypedSelect {
|
|
if err := enabledFeatures.RequireEnabled(api.CoreFeatureReferenceTypes); err != nil {
|
|
return fmt.Errorf("%s is invalid as %w", InstructionName(op), err)
|
|
}
|
|
pc++
|
|
if numTypeImmeidates := body[pc]; numTypeImmeidates != 1 {
|
|
return fmt.Errorf("too many type immediates for %s", InstructionName(op))
|
|
}
|
|
pc++
|
|
tp := body[pc]
|
|
if tp != ValueTypeI32 && tp != ValueTypeI64 && tp != ValueTypeF32 && tp != ValueTypeF64 &&
|
|
tp != api.ValueTypeExternref && tp != ValueTypeFuncref && tp != ValueTypeV128 {
|
|
return fmt.Errorf("invalid type %s for %s", ValueTypeName(tp), OpcodeTypedSelectName)
|
|
}
|
|
} else if isReferenceValueType(v1) || isReferenceValueType(v2) {
|
|
return fmt.Errorf("reference types cannot be used for non typed select instruction")
|
|
}
|
|
|
|
if v1 != v2 && v1 != valueTypeUnknown && v2 != valueTypeUnknown {
|
|
return fmt.Errorf("type mismatch on 1st and 2nd select operands")
|
|
}
|
|
if v1 == valueTypeUnknown {
|
|
valueTypeStack.push(v2)
|
|
} else {
|
|
valueTypeStack.push(v1)
|
|
}
|
|
} else if op == OpcodeUnreachable {
|
|
// unreachable instruction is stack-polymorphic.
|
|
valueTypeStack.unreachable()
|
|
} else if op == OpcodeNop {
|
|
} else {
|
|
return fmt.Errorf("invalid instruction 0x%x", op)
|
|
}
|
|
}
|
|
|
|
if len(controlBlockStack.stack) > 0 {
|
|
return fmt.Errorf("ill-nested block exists")
|
|
}
|
|
if valueTypeStack.maximumStackPointer > maxStackValues {
|
|
return fmt.Errorf("function may have %d stack values, which exceeds limit %d", valueTypeStack.maximumStackPointer, maxStackValues)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
var vecExtractLanes = [...]struct {
|
|
laneCeil byte
|
|
resultType ValueType
|
|
}{
|
|
OpcodeVecI8x16ExtractLaneS: {laneCeil: 16, resultType: ValueTypeI32},
|
|
OpcodeVecI8x16ExtractLaneU: {laneCeil: 16, resultType: ValueTypeI32},
|
|
OpcodeVecI16x8ExtractLaneS: {laneCeil: 8, resultType: ValueTypeI32},
|
|
OpcodeVecI16x8ExtractLaneU: {laneCeil: 8, resultType: ValueTypeI32},
|
|
OpcodeVecI32x4ExtractLane: {laneCeil: 4, resultType: ValueTypeI32},
|
|
OpcodeVecI64x2ExtractLane: {laneCeil: 2, resultType: ValueTypeI64},
|
|
OpcodeVecF32x4ExtractLane: {laneCeil: 4, resultType: ValueTypeF32},
|
|
OpcodeVecF64x2ExtractLane: {laneCeil: 2, resultType: ValueTypeF64},
|
|
}
|
|
|
|
var vecReplaceLanes = [...]struct {
|
|
laneCeil byte
|
|
paramType ValueType
|
|
}{
|
|
OpcodeVecI8x16ReplaceLane: {laneCeil: 16, paramType: ValueTypeI32},
|
|
OpcodeVecI16x8ReplaceLane: {laneCeil: 8, paramType: ValueTypeI32},
|
|
OpcodeVecI32x4ReplaceLane: {laneCeil: 4, paramType: ValueTypeI32},
|
|
OpcodeVecI64x2ReplaceLane: {laneCeil: 2, paramType: ValueTypeI64},
|
|
OpcodeVecF32x4ReplaceLane: {laneCeil: 4, paramType: ValueTypeF32},
|
|
OpcodeVecF64x2ReplaceLane: {laneCeil: 2, paramType: ValueTypeF64},
|
|
}
|
|
|
|
var vecStoreLanes = [...]struct {
|
|
alignMax uint32
|
|
laneCeil byte
|
|
}{
|
|
OpcodeVecV128Store64Lane: {alignMax: 64 / 8, laneCeil: 128 / 64},
|
|
OpcodeVecV128Store32Lane: {alignMax: 32 / 8, laneCeil: 128 / 32},
|
|
OpcodeVecV128Store16Lane: {alignMax: 16 / 8, laneCeil: 128 / 16},
|
|
OpcodeVecV128Store8Lane: {alignMax: 1, laneCeil: 128 / 8},
|
|
}
|
|
|
|
var vecLoadLanes = [...]struct {
|
|
alignMax uint32
|
|
laneCeil byte
|
|
}{
|
|
OpcodeVecV128Load64Lane: {alignMax: 64 / 8, laneCeil: 128 / 64},
|
|
OpcodeVecV128Load32Lane: {alignMax: 32 / 8, laneCeil: 128 / 32},
|
|
OpcodeVecV128Load16Lane: {alignMax: 16 / 8, laneCeil: 128 / 16},
|
|
OpcodeVecV128Load8Lane: {alignMax: 1, laneCeil: 128 / 8},
|
|
}
|
|
|
|
var vecSplatValueTypes = [...]ValueType{
|
|
OpcodeVecI8x16Splat: ValueTypeI32,
|
|
OpcodeVecI16x8Splat: ValueTypeI32,
|
|
OpcodeVecI32x4Splat: ValueTypeI32,
|
|
OpcodeVecI64x2Splat: ValueTypeI64,
|
|
OpcodeVecF32x4Splat: ValueTypeF32,
|
|
OpcodeVecF64x2Splat: ValueTypeF64,
|
|
}
|
|
|
|
type stacks struct {
|
|
vs valueTypeStack
|
|
cs controlBlockStack
|
|
}
|
|
|
|
func (sts *stacks) reset(functionType *FunctionType) {
|
|
// Reset valueStack for reuse.
|
|
sts.vs.stack = sts.vs.stack[:0]
|
|
sts.vs.stackLimits = sts.vs.stackLimits[:0]
|
|
sts.vs.maximumStackPointer = 0
|
|
sts.cs.stack = sts.cs.stack[:0]
|
|
sts.cs.stack = append(sts.cs.stack, controlBlock{blockType: functionType})
|
|
}
|
|
|
|
type controlBlockStack struct {
|
|
stack []controlBlock
|
|
}
|
|
|
|
func (s *controlBlockStack) pop() *controlBlock {
|
|
tail := len(s.stack) - 1
|
|
ret := &s.stack[tail]
|
|
s.stack = s.stack[:tail]
|
|
return ret
|
|
}
|
|
|
|
func (s *controlBlockStack) push(startAt, elseAt, endAt uint64, blockType *FunctionType, blockTypeBytes uint64, op Opcode) {
|
|
s.stack = append(s.stack, controlBlock{
|
|
startAt: startAt,
|
|
elseAt: elseAt,
|
|
endAt: endAt,
|
|
blockType: blockType,
|
|
blockTypeBytes: blockTypeBytes,
|
|
op: op,
|
|
})
|
|
}
|
|
|
|
type valueTypeStack struct {
|
|
stack []ValueType
|
|
stackLimits []int
|
|
maximumStackPointer int
|
|
// requireStackValuesTmp is used in requireStackValues function to reduce the allocation.
|
|
requireStackValuesTmp []ValueType
|
|
}
|
|
|
|
// Only used in the analyzeFunction below.
|
|
const valueTypeUnknown = ValueType(0xFF)
|
|
|
|
func (s *valueTypeStack) tryPop() (vt ValueType, limit int, ok bool) {
|
|
if len(s.stackLimits) > 0 {
|
|
limit = s.stackLimits[len(s.stackLimits)-1]
|
|
}
|
|
stackLen := len(s.stack)
|
|
if stackLen <= limit {
|
|
return
|
|
} else if stackLen == limit+1 && s.stack[limit] == valueTypeUnknown {
|
|
vt = valueTypeUnknown
|
|
ok = true
|
|
return
|
|
} else {
|
|
vt = s.stack[stackLen-1]
|
|
s.stack = s.stack[:stackLen-1]
|
|
ok = true
|
|
return
|
|
}
|
|
}
|
|
|
|
func (s *valueTypeStack) pop() (ValueType, error) {
|
|
if vt, limit, ok := s.tryPop(); ok {
|
|
return vt, nil
|
|
} else {
|
|
return 0, fmt.Errorf("invalid operation: trying to pop at %d with limit %d", len(s.stack), limit)
|
|
}
|
|
}
|
|
|
|
// popAndVerifyType returns an error if the stack value is unexpected.
|
|
func (s *valueTypeStack) popAndVerifyType(expected ValueType) error {
|
|
have, _, ok := s.tryPop()
|
|
if !ok {
|
|
return fmt.Errorf("%s missing", ValueTypeName(expected))
|
|
}
|
|
if have != expected && have != valueTypeUnknown && expected != valueTypeUnknown {
|
|
return fmt.Errorf("type mismatch: expected %s, but was %s", ValueTypeName(expected), ValueTypeName(have))
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (s *valueTypeStack) push(v ValueType) {
|
|
s.stack = append(s.stack, v)
|
|
if sp := len(s.stack); sp > s.maximumStackPointer {
|
|
s.maximumStackPointer = sp
|
|
}
|
|
}
|
|
|
|
func (s *valueTypeStack) unreachable() {
|
|
s.resetAtStackLimit()
|
|
s.stack = append(s.stack, valueTypeUnknown)
|
|
}
|
|
|
|
func (s *valueTypeStack) resetAtStackLimit() {
|
|
if len(s.stackLimits) != 0 {
|
|
s.stack = s.stack[:s.stackLimits[len(s.stackLimits)-1]]
|
|
} else {
|
|
s.stack = s.stack[:0]
|
|
}
|
|
}
|
|
|
|
func (s *valueTypeStack) popStackLimit() {
|
|
if len(s.stackLimits) != 0 {
|
|
s.stackLimits = s.stackLimits[:len(s.stackLimits)-1]
|
|
}
|
|
}
|
|
|
|
// pushStackLimit pushes the control frame's bottom of the stack.
|
|
func (s *valueTypeStack) pushStackLimit(params int) {
|
|
limit := len(s.stack) - params
|
|
s.stackLimits = append(s.stackLimits, limit)
|
|
}
|
|
|
|
func (s *valueTypeStack) popParams(oc Opcode, want []ValueType, checkAboveLimit bool) error {
|
|
return s.requireStackValues(true, InstructionName(oc), want, checkAboveLimit)
|
|
}
|
|
|
|
func (s *valueTypeStack) popResults(oc Opcode, want []ValueType, checkAboveLimit bool) error {
|
|
return s.requireStackValues(false, InstructionName(oc), want, checkAboveLimit)
|
|
}
|
|
|
|
func (s *valueTypeStack) requireStackValues(
|
|
isParam bool,
|
|
context string,
|
|
want []ValueType,
|
|
checkAboveLimit bool,
|
|
) error {
|
|
limit := 0
|
|
if len(s.stackLimits) > 0 {
|
|
limit = s.stackLimits[len(s.stackLimits)-1]
|
|
}
|
|
// Iterate backwards as we are comparing the desired slice against stack value types.
|
|
countWanted := len(want)
|
|
|
|
// First, check if there are enough values on the stack.
|
|
s.requireStackValuesTmp = s.requireStackValuesTmp[:0]
|
|
for i := countWanted - 1; i >= 0; i-- {
|
|
popped, _, ok := s.tryPop()
|
|
if !ok {
|
|
if len(s.requireStackValuesTmp) > len(want) {
|
|
return typeCountError(isParam, context, s.requireStackValuesTmp, want)
|
|
}
|
|
return typeCountError(isParam, context, s.requireStackValuesTmp, want)
|
|
}
|
|
s.requireStackValuesTmp = append(s.requireStackValuesTmp, popped)
|
|
}
|
|
|
|
// Now, check if there are too many values.
|
|
if checkAboveLimit {
|
|
if !(limit == len(s.stack) || (limit+1 == len(s.stack) && s.stack[limit] == valueTypeUnknown)) {
|
|
return typeCountError(isParam, context, append(s.stack, want...), want)
|
|
}
|
|
}
|
|
|
|
// Finally, check the types of the values:
|
|
for i, v := range s.requireStackValuesTmp {
|
|
nextWant := want[countWanted-i-1] // have is in reverse order (stack)
|
|
if v != nextWant && v != valueTypeUnknown && nextWant != valueTypeUnknown {
|
|
return typeMismatchError(isParam, context, v, nextWant, i)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// typeMismatchError returns an error similar to go compiler's error on type mismatch.
|
|
func typeMismatchError(isParam bool, context string, have ValueType, want ValueType, i int) error {
|
|
var ret strings.Builder
|
|
ret.WriteString("cannot use ")
|
|
ret.WriteString(ValueTypeName(have))
|
|
if context != "" {
|
|
ret.WriteString(" in ")
|
|
ret.WriteString(context)
|
|
ret.WriteString(" block")
|
|
}
|
|
if isParam {
|
|
ret.WriteString(" as param")
|
|
} else {
|
|
ret.WriteString(" as result")
|
|
}
|
|
ret.WriteString("[")
|
|
ret.WriteString(strconv.Itoa(i))
|
|
ret.WriteString("] type ")
|
|
ret.WriteString(ValueTypeName(want))
|
|
return errors.New(ret.String())
|
|
}
|
|
|
|
// typeCountError returns an error similar to go compiler's error on type count mismatch.
|
|
func typeCountError(isParam bool, context string, have []ValueType, want []ValueType) error {
|
|
var ret strings.Builder
|
|
if len(have) > len(want) {
|
|
ret.WriteString("too many ")
|
|
} else {
|
|
ret.WriteString("not enough ")
|
|
}
|
|
if isParam {
|
|
ret.WriteString("params")
|
|
} else {
|
|
ret.WriteString("results")
|
|
}
|
|
if context != "" {
|
|
if isParam {
|
|
ret.WriteString(" for ")
|
|
} else {
|
|
ret.WriteString(" in ")
|
|
}
|
|
ret.WriteString(context)
|
|
ret.WriteString(" block")
|
|
}
|
|
ret.WriteString("\n\thave (")
|
|
writeValueTypes(have, &ret)
|
|
ret.WriteString(")\n\twant (")
|
|
writeValueTypes(want, &ret)
|
|
ret.WriteByte(')')
|
|
return errors.New(ret.String())
|
|
}
|
|
|
|
func writeValueTypes(vts []ValueType, ret *strings.Builder) {
|
|
switch len(vts) {
|
|
case 0:
|
|
case 1:
|
|
ret.WriteString(ValueTypeName(vts[0]))
|
|
default:
|
|
ret.WriteString(ValueTypeName(vts[0]))
|
|
for _, vt := range vts[1:] {
|
|
ret.WriteString(", ")
|
|
ret.WriteString(ValueTypeName(vt))
|
|
}
|
|
}
|
|
}
|
|
|
|
func (s *valueTypeStack) String() string {
|
|
var typeStrs, limits []string
|
|
for _, v := range s.stack {
|
|
var str string
|
|
if v == valueTypeUnknown {
|
|
str = "unknown"
|
|
} else {
|
|
str = ValueTypeName(v)
|
|
}
|
|
typeStrs = append(typeStrs, str)
|
|
}
|
|
for _, d := range s.stackLimits {
|
|
limits = append(limits, fmt.Sprintf("%d", d))
|
|
}
|
|
return fmt.Sprintf("{stack: [%s], limits: [%s]}",
|
|
strings.Join(typeStrs, ", "), strings.Join(limits, ","))
|
|
}
|
|
|
|
type controlBlock struct {
|
|
startAt, elseAt, endAt uint64
|
|
blockType *FunctionType
|
|
blockTypeBytes uint64
|
|
// op is zero when the outermost block
|
|
op Opcode
|
|
}
|
|
|
|
// DecodeBlockType decodes the type index from a positive 33-bit signed integer. Negative numbers indicate up to one
|
|
// WebAssembly 1.0 (20191205) compatible result type. Positive numbers are decoded when `enabledFeatures` include
|
|
// CoreFeatureMultiValue and include an index in the Module.TypeSection.
|
|
//
|
|
// See https://www.w3.org/TR/2019/REC-wasm-core-1-20191205/#binary-blocktype
|
|
// See https://github.com/WebAssembly/spec/blob/wg-2.0.draft1/proposals/multi-value/Overview.md
|
|
func DecodeBlockType(types []FunctionType, r *bytes.Reader, enabledFeatures api.CoreFeatures) (*FunctionType, uint64, error) {
|
|
raw, num, err := leb128.DecodeInt33AsInt64(r)
|
|
if err != nil {
|
|
return nil, 0, fmt.Errorf("decode int33: %w", err)
|
|
}
|
|
|
|
var ret *FunctionType
|
|
switch raw {
|
|
case -64: // 0x40 in original byte = nil
|
|
ret = blockType_v_v
|
|
case -1: // 0x7f in original byte = i32
|
|
ret = blockType_v_i32
|
|
case -2: // 0x7e in original byte = i64
|
|
ret = blockType_v_i64
|
|
case -3: // 0x7d in original byte = f32
|
|
ret = blockType_v_f32
|
|
case -4: // 0x7c in original byte = f64
|
|
ret = blockType_v_f64
|
|
case -5: // 0x7b in original byte = v128
|
|
ret = blockType_v_v128
|
|
case -16: // 0x70 in original byte = funcref
|
|
ret = blockType_v_funcref
|
|
case -17: // 0x6f in original byte = externref
|
|
ret = blockType_v_externref
|
|
default:
|
|
if err = enabledFeatures.RequireEnabled(api.CoreFeatureMultiValue); err != nil {
|
|
return nil, num, fmt.Errorf("block with function type return invalid as %v", err)
|
|
}
|
|
if raw < 0 || (raw >= int64(len(types))) {
|
|
return nil, 0, fmt.Errorf("type index out of range: %d", raw)
|
|
}
|
|
ret = &types[raw]
|
|
}
|
|
return ret, num, err
|
|
}
|
|
|
|
// These block types are defined as globals in order to avoid allocations in DecodeBlockType.
|
|
var (
|
|
blockType_v_v = &FunctionType{}
|
|
blockType_v_i32 = &FunctionType{Results: []ValueType{ValueTypeI32}, ResultNumInUint64: 1}
|
|
blockType_v_i64 = &FunctionType{Results: []ValueType{ValueTypeI64}, ResultNumInUint64: 1}
|
|
blockType_v_f32 = &FunctionType{Results: []ValueType{ValueTypeF32}, ResultNumInUint64: 1}
|
|
blockType_v_f64 = &FunctionType{Results: []ValueType{ValueTypeF64}, ResultNumInUint64: 1}
|
|
blockType_v_v128 = &FunctionType{Results: []ValueType{ValueTypeV128}, ResultNumInUint64: 2}
|
|
blockType_v_funcref = &FunctionType{Results: []ValueType{ValueTypeFuncref}, ResultNumInUint64: 1}
|
|
blockType_v_externref = &FunctionType{Results: []ValueType{ValueTypeExternref}, ResultNumInUint64: 1}
|
|
)
|
|
|
|
// SplitCallStack returns the input stack resliced to the count of params and
|
|
// results, or errors if it isn't long enough for either.
|
|
func SplitCallStack(ft *FunctionType, stack []uint64) (params []uint64, results []uint64, err error) {
|
|
stackLen := len(stack)
|
|
if n := ft.ParamNumInUint64; n > stackLen {
|
|
return nil, nil, fmt.Errorf("need %d params, but stack size is %d", n, stackLen)
|
|
} else if n > 0 {
|
|
params = stack[:n]
|
|
}
|
|
if n := ft.ResultNumInUint64; n > stackLen {
|
|
return nil, nil, fmt.Errorf("need %d results, but stack size is %d", n, stackLen)
|
|
} else if n > 0 {
|
|
results = stack[:n]
|
|
}
|
|
return
|
|
}
|