context

Documentation

Overview

Package context contains the context objects for the executors that perform a specific action on the Wasm code tree (Module) that they operate on. The executors keep track of their execution state in these context objects.

Index

• Constants
• type Analyzer
  • func NewAnalyzer(m *sections.Module, params []value.DataType, locals []*sections.Local) *Analyzer
  • func (a *Analyzer) Fail(format string, args ...interface{})
  • func (a *Analyzer) Pop() value.DataType
  • func (a *Analyzer) PopExpected(expected value.DataType) value.DataType
  • func (a *Analyzer) PopMulti(values []value.DataType)
  • func (a *Analyzer) Push(dataType value.DataType)
  • func (a *Analyzer) PushMulti(dataTypes []value.DataType)
• type Label
  • func NewLabel(blockType *sections.FuncType, target helper.Instruction) *Label
• type Reader
  • func NewReader(m *sections.Module, data []byte) *Reader
  • func (r *Reader) GetByte() byte
  • func (r *Reader) GetBytes(count uint32) []byte
  • func (r *Reader) GetDataType() value.DataType
  • func (r *Reader) GetDataTypes() []value.DataType
  • func (r *Reader) GetF32() float32
  • func (r *Reader) GetF64() float64
  • func (r *Reader) GetI32() int32
  • func (r *Reader) GetI64() int64
  • func (r *Reader) GetLimits()
  • func (r *Reader) GetString() string
  • func (r *Reader) GetU32() uint32
  • func (r *Reader) GetU64() uint64
  • func (r *Reader) Size() uint32
• type Runner
  • func NewRunner(m *sections.Module, host interfaces.HostInterface) *Runner
• type Writer
  • func NewWriter() *Writer
  • func (w *Writer) Data() []byte
  • func (w *Writer) PutByte(val byte)
  • func (w *Writer) PutBytes(data []byte)
  • func (w *Writer) PutDataType(dataType value.DataType)
  • func (w *Writer) PutDataTypes(dataTypes []value.DataType)
  • func (w *Writer) PutF32(val float32)
  • func (w *Writer) PutF64(val float64)
  • func (w *Writer) PutI32(val int32)
  • func (w *Writer) PutI64(val int64)
  • func (w *Writer) PutLimits(min uint32, max uint32)
  • func (w *Writer) PutString(val string)
  • func (w *Writer) PutU32(val uint32)
  • func (w *Writer) PutU64(val uint64)
  • func (w *Writer) Size() uint32

Constants

const PAGE_SIZE = 0x10000

Types

type Analyzer

type Analyzer struct {
	BlockMark int
	Code      []helper.Instruction
	Error     error
	Frame     []value.DataType
	FuncNr    uint32
	IP        int
	Labels    []*Label
	Locals    int
	MaxSP     int
	MinSP     int
	Module    *sections.Module
	SP        int
}

func NewAnalyzer

func NewAnalyzer(m *sections.Module, params []value.DataType, locals []*sections.Local) *Analyzer

func (*Analyzer) Fail

func (a *Analyzer) Fail(format string, args ...interface{})

func (*Analyzer) Pop

func (a *Analyzer) Pop() value.DataType

func (*Analyzer) PopExpected

func (a *Analyzer) PopExpected(expected value.DataType) value.DataType

func (*Analyzer) PopMulti

func (a *Analyzer) PopMulti(values []value.DataType)

func (*Analyzer) Push

func (a *Analyzer) Push(dataType value.DataType)

func (*Analyzer) PushMulti

func (a *Analyzer) PushMulti(dataTypes []value.DataType)

type Label

type Label struct {
	BlockInst   helper.Instruction
	BlockType   *sections.FuncType
	HasElse     bool
	Target      helper.Instruction
	Unreachable bool
	UnwindSP    int
}

func NewLabel

func NewLabel(blockType *sections.FuncType, target helper.Instruction) *Label

type Reader

type Reader struct {
	Flag   byte
	Error  error
	Max    uint32
	Min    uint32
	Module *sections.Module
	Opcode byte

	IP int
	// contains filtered or unexported fields
}

func NewReader

func NewReader(m *sections.Module, data []byte) *Reader

func (*Reader) GetByte

func (r *Reader) GetByte() byte

func (*Reader) GetBytes

func (r *Reader) GetBytes(count uint32) []byte

func (*Reader) GetDataType

func (r *Reader) GetDataType() value.DataType

func (*Reader) GetDataTypes

func (r *Reader) GetDataTypes() []value.DataType

func (*Reader) GetF32

func (r *Reader) GetF32() float32

func (*Reader) GetF64

func (r *Reader) GetF64() float64

func (*Reader) GetI32

func (r *Reader) GetI32() int32

func (*Reader) GetI64

func (r *Reader) GetI64() int64

func (*Reader) GetLimits

func (r *Reader) GetLimits()

func (*Reader) GetString

func (r *Reader) GetString() string

func (*Reader) GetU32

func (r *Reader) GetU32() uint32

func (*Reader) GetU64

func (r *Reader) GetU64() uint64

func (*Reader) Size

func (r *Reader) Size() uint32

returns size of unread part

type Runner

type Runner struct {
	Addr      uint32
	Buffer    []byte
	CallDepth int
	Error     error
	Frame     []sections.Variable
	Host      interfaces.HostInterface
	Module    *sections.Module
	Next      helper.Instruction
	SP        int
}

func NewRunner

func NewRunner(m *sections.Module, host interfaces.HostInterface) *Runner

type Writer

type Writer struct {
	// contains filtered or unexported fields
}

func NewWriter

func NewWriter() *Writer

func (*Writer) Data

func (w *Writer) Data() []byte

func (*Writer) PutByte

func (w *Writer) PutByte(val byte)

func (*Writer) PutBytes

func (w *Writer) PutBytes(data []byte)

func (*Writer) PutDataType

func (w *Writer) PutDataType(dataType value.DataType)

func (*Writer) PutDataTypes

func (w *Writer) PutDataTypes(dataTypes []value.DataType)

func (*Writer) PutF32

func (w *Writer) PutF32(val float32)

func (*Writer) PutF64

func (w *Writer) PutF64(val float64)

func (*Writer) PutI32

func (w *Writer) PutI32(val int32)

func (*Writer) PutI64

func (w *Writer) PutI64(val int64)

func (*Writer) PutLimits

func (w *Writer) PutLimits(min uint32, max uint32)

func (*Writer) PutString

func (w *Writer) PutString(val string)

func (*Writer) PutU32

func (w *Writer) PutU32(val uint32)

func (*Writer) PutU64

func (w *Writer) PutU64(val uint64)

func (*Writer) Size

func (w *Writer) Size() uint32

returns size of written part