forked from TrueCloudLab/neoneo-go
6b21ad9922
Everywhere including examples, external interop APIs, bindings generators
code and in other valuable places. A couple of `interface{}` usages are
intentionally left in the CHANGELOG.md, documentation and tests.
615 lines
18 KiB
Go
615 lines
18 KiB
Go
package compiler
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import (
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"encoding/json"
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"errors"
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"fmt"
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"go/ast"
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"go/types"
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"sort"
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"strconv"
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"strings"
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"unicode"
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"unicode/utf8"
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"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/binding"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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)
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// DebugInfo represents smart-contract debug information.
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type DebugInfo struct {
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MainPkg string `json:"-"`
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Hash util.Uint160 `json:"hash"`
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Documents []string `json:"documents"`
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Methods []MethodDebugInfo `json:"methods"`
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// NamedTypes are exported structured types that have some name (even
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// if the original structure doesn't) and a number of internal fields.
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NamedTypes map[string]binding.ExtendedType `json:"-"`
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Events []EventDebugInfo `json:"events"`
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// EmittedEvents contains events occurring in code.
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EmittedEvents map[string][][]string `json:"-"`
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// InvokedContracts contains foreign contract invocations.
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InvokedContracts map[util.Uint160][]string `json:"-"`
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// StaticVariables contains a list of static variable names and types.
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StaticVariables []string `json:"static-variables"`
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}
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// MethodDebugInfo represents smart-contract's method debug information.
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type MethodDebugInfo struct {
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// ID is the actual name of the method.
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ID string `json:"id"`
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// Name is the name of the method with the first letter in a lowercase
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// together with the namespace it belongs to. We need to keep the first letter
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// lowercased to match manifest standards.
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Name DebugMethodName `json:"name"`
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// IsExported defines whether the method is exported.
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IsExported bool `json:"-"`
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// IsFunction defines whether the method has no receiver.
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IsFunction bool `json:"-"`
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// Range is the range of smart-contract's opcodes corresponding to the method.
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Range DebugRange `json:"range"`
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// Parameters is a list of the method's parameters.
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Parameters []DebugParam `json:"params"`
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// ReturnType is the method's return type.
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ReturnType string `json:"return"`
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// ReturnTypeReal is the method's return type as specified in Go code.
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ReturnTypeReal binding.Override `json:"-"`
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// ReturnTypeExtended is the method's return type with additional data.
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ReturnTypeExtended *binding.ExtendedType `json:"-"`
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// ReturnTypeSC is a return type to use in manifest.
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ReturnTypeSC smartcontract.ParamType `json:"-"`
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Variables []string `json:"variables"`
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// SeqPoints is a map between source lines and byte-code instruction offsets.
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SeqPoints []DebugSeqPoint `json:"sequence-points"`
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}
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// DebugMethodName is a combination of a namespace and name.
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type DebugMethodName struct {
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Namespace string
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Name string
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}
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// EventDebugInfo represents smart-contract's event debug information.
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type EventDebugInfo struct {
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ID string `json:"id"`
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// Name is a human-readable event name in a format "{namespace},{name}".
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Name string `json:"name"`
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Parameters []DebugParam `json:"params"`
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}
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// DebugSeqPoint represents break-point for debugger.
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type DebugSeqPoint struct {
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// Opcode is an opcode's address.
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Opcode int
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// Document is an index of file where sequence point occurs.
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Document int
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// StartLine is the first line of the break-pointed statement.
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StartLine int
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// StartCol is the first column of the break-pointed statement.
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StartCol int
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// EndLine is the last line of the break-pointed statement.
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EndLine int
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// EndCol is the last column of the break-pointed statement.
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EndCol int
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}
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// DebugRange represents the method's section in bytecode.
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type DebugRange struct {
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Start uint16
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End uint16
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}
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// DebugParam represents the variables's name and type.
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type DebugParam struct {
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Name string `json:"name"`
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Type string `json:"type"`
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RealType binding.Override `json:"-"`
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ExtendedType *binding.ExtendedType `json:"-"`
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TypeSC smartcontract.ParamType `json:"-"`
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}
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func (c *codegen) saveSequencePoint(n ast.Node) {
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name := "init"
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if c.scope != nil {
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name = c.scope.name
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}
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fset := c.buildInfo.config.Fset
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start := fset.Position(n.Pos())
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end := fset.Position(n.End())
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c.sequencePoints[name] = append(c.sequencePoints[name], DebugSeqPoint{
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Opcode: c.prog.Len(),
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Document: c.docIndex[start.Filename],
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StartLine: start.Line,
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StartCol: start.Offset,
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EndLine: end.Line,
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EndCol: end.Offset,
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})
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}
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func (c *codegen) emitDebugInfo(contract []byte) *DebugInfo {
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d := &DebugInfo{
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Hash: hash.Hash160(contract),
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MainPkg: c.mainPkg.Name,
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Events: []EventDebugInfo{},
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Documents: c.documents,
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StaticVariables: c.staticVariables,
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}
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if c.initEndOffset > 0 {
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d.Methods = append(d.Methods, MethodDebugInfo{
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ID: manifest.MethodInit,
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Name: DebugMethodName{
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Name: manifest.MethodInit,
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Namespace: c.mainPkg.Name,
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},
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IsExported: true,
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IsFunction: true,
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Range: DebugRange{
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Start: 0,
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End: uint16(c.initEndOffset),
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},
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ReturnType: "Void",
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ReturnTypeSC: smartcontract.VoidType,
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SeqPoints: c.sequencePoints["init"],
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Variables: c.initVariables,
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})
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}
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if c.deployEndOffset >= 0 {
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d.Methods = append(d.Methods, MethodDebugInfo{
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ID: manifest.MethodDeploy,
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Name: DebugMethodName{
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Name: manifest.MethodDeploy,
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Namespace: c.mainPkg.Name,
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},
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IsExported: true,
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IsFunction: true,
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Range: DebugRange{
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Start: uint16(c.initEndOffset + 1),
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End: uint16(c.deployEndOffset),
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},
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Parameters: []DebugParam{
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{
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Name: "data",
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Type: "Any",
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TypeSC: smartcontract.AnyType,
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},
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{
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Name: "isUpdate",
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Type: "Boolean",
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TypeSC: smartcontract.BoolType,
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},
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},
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ReturnType: "Void",
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ReturnTypeSC: smartcontract.VoidType,
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SeqPoints: c.sequencePoints[manifest.MethodDeploy],
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Variables: c.deployVariables,
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})
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}
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start := len(d.Methods)
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d.NamedTypes = make(map[string]binding.ExtendedType)
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for name, scope := range c.funcs {
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m := c.methodInfoFromScope(name, scope, d.NamedTypes)
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if m.Range.Start == m.Range.End {
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continue
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}
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d.Methods = append(d.Methods, *m)
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}
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sort.Slice(d.Methods[start:], func(i, j int) bool {
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return d.Methods[start+i].Name.Name < d.Methods[start+j].Name.Name
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})
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d.EmittedEvents = c.emittedEvents
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d.InvokedContracts = c.invokedContracts
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return d
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}
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func (c *codegen) registerDebugVariable(name string, expr ast.Expr) {
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_, vt, _, _ := c.scAndVMTypeFromExpr(expr, nil)
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if c.scope == nil {
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c.staticVariables = append(c.staticVariables, name+","+vt.String())
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return
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}
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c.scope.variables = append(c.scope.variables, name+","+vt.String())
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}
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func (c *codegen) methodInfoFromScope(name string, scope *funcScope, exts map[string]binding.ExtendedType) *MethodDebugInfo {
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ps := scope.decl.Type.Params
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params := make([]DebugParam, 0, ps.NumFields())
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for i := range ps.List {
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for j := range ps.List[i].Names {
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st, vt, rt, et := c.scAndVMTypeFromExpr(ps.List[i].Type, exts)
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params = append(params, DebugParam{
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Name: ps.List[i].Names[j].Name,
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Type: vt.String(),
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ExtendedType: et,
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RealType: rt,
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TypeSC: st,
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})
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}
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}
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ss := strings.Split(name, ".")
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name = ss[len(ss)-1]
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r, n := utf8.DecodeRuneInString(name)
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st, vt, rt, et := c.scAndVMReturnTypeFromScope(scope, exts)
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return &MethodDebugInfo{
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ID: name,
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Name: DebugMethodName{
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Name: string(unicode.ToLower(r)) + name[n:],
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Namespace: scope.pkg.Name(),
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},
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IsExported: scope.decl.Name.IsExported(),
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IsFunction: scope.decl.Recv == nil,
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Range: scope.rng,
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Parameters: params,
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ReturnType: vt,
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ReturnTypeExtended: et,
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ReturnTypeReal: rt,
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ReturnTypeSC: st,
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SeqPoints: c.sequencePoints[name],
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Variables: scope.variables,
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}
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}
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func (c *codegen) scAndVMReturnTypeFromScope(scope *funcScope, exts map[string]binding.ExtendedType) (smartcontract.ParamType, string, binding.Override, *binding.ExtendedType) {
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results := scope.decl.Type.Results
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switch results.NumFields() {
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case 0:
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return smartcontract.VoidType, "Void", binding.Override{}, nil
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case 1:
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st, vt, s, et := c.scAndVMTypeFromExpr(results.List[0].Type, exts)
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return st, vt.String(), s, et
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default:
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// multiple return values are not supported in debugger
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return smartcontract.AnyType, "Any", binding.Override{}, nil
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}
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}
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func scAndVMInteropTypeFromExpr(named *types.Named, isPointer bool) (smartcontract.ParamType, stackitem.Type, binding.Override, *binding.ExtendedType) {
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name := named.Obj().Name()
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pkg := named.Obj().Pkg().Name()
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switch pkg {
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case "ledger", "management":
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switch name {
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case "ParameterType", "SignerScope", "WitnessAction", "WitnessConditionType", "VMState":
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return smartcontract.IntegerType, stackitem.IntegerT, binding.Override{TypeName: "int"}, nil
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}
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// Block, Transaction, Contract.
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typeName := pkg + "." + name
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et := &binding.ExtendedType{Base: smartcontract.ArrayType, Name: typeName}
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if isPointer {
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typeName = "*" + typeName
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}
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return smartcontract.ArrayType, stackitem.ArrayT, binding.Override{
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Package: named.Obj().Pkg().Path(),
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TypeName: typeName,
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}, et
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case "interop":
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if name != "Interface" {
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over := binding.Override{
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Package: interopPrefix,
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TypeName: "interop." + name,
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}
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switch name {
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case "Hash160":
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return smartcontract.Hash160Type, stackitem.ByteArrayT, over, nil
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case "Hash256":
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return smartcontract.Hash256Type, stackitem.ByteArrayT, over, nil
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case "PublicKey":
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return smartcontract.PublicKeyType, stackitem.ByteArrayT, over, nil
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case "Signature":
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return smartcontract.SignatureType, stackitem.ByteArrayT, over, nil
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}
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}
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}
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return smartcontract.InteropInterfaceType,
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stackitem.InteropT,
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binding.Override{TypeName: "any"},
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&binding.ExtendedType{Base: smartcontract.InteropInterfaceType, Interface: "iterator"} // Temporarily all interops are iterators.
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}
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func (c *codegen) scAndVMTypeFromExpr(typ ast.Expr, exts map[string]binding.ExtendedType) (smartcontract.ParamType, stackitem.Type, binding.Override, *binding.ExtendedType) {
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return c.scAndVMTypeFromType(c.typeOf(typ), exts)
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}
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func (c *codegen) scAndVMTypeFromType(t types.Type, exts map[string]binding.ExtendedType) (smartcontract.ParamType, stackitem.Type, binding.Override, *binding.ExtendedType) {
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if t == nil {
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return smartcontract.AnyType, stackitem.AnyT, binding.Override{TypeName: "any"}, nil
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}
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var isPtr bool
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named, isNamed := t.(*types.Named)
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if !isNamed {
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var ptr *types.Pointer
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if ptr, isPtr = t.(*types.Pointer); isPtr {
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named, isNamed = ptr.Elem().(*types.Named)
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}
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}
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if isNamed {
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if isInteropPath(named.String()) {
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st, vt, over, et := scAndVMInteropTypeFromExpr(named, isPtr)
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if et != nil && et.Base == smartcontract.ArrayType && exts != nil && exts[et.Name].Name != et.Name {
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_ = c.genStructExtended(named.Underlying().(*types.Struct), et.Name, exts)
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}
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return st, vt, over, et
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}
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}
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if ptr, isPtr := t.(*types.Pointer); isPtr {
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t = ptr.Elem()
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}
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var over binding.Override
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switch t := t.Underlying().(type) {
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case *types.Basic:
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info := t.Info()
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switch {
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case info&types.IsInteger != 0:
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over.TypeName = "int"
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return smartcontract.IntegerType, stackitem.IntegerT, over, nil
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case info&types.IsBoolean != 0:
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over.TypeName = "bool"
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return smartcontract.BoolType, stackitem.BooleanT, over, nil
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case info&types.IsString != 0:
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over.TypeName = "string"
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return smartcontract.StringType, stackitem.ByteArrayT, over, nil
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default:
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over.TypeName = "any"
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return smartcontract.AnyType, stackitem.AnyT, over, nil
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}
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case *types.Map:
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et := &binding.ExtendedType{
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Base: smartcontract.MapType,
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}
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et.Key, _, _, _ = c.scAndVMTypeFromType(t.Key(), exts)
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vt, _, over, vet := c.scAndVMTypeFromType(t.Elem(), exts)
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et.Value = vet
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if et.Value == nil {
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et.Value = &binding.ExtendedType{Base: vt}
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}
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over.TypeName = "map[" + t.Key().String() + "]" + over.TypeName
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return smartcontract.MapType, stackitem.MapT, over, et
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case *types.Struct:
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if isNamed {
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over.Package = named.Obj().Pkg().Path()
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over.TypeName = named.Obj().Pkg().Name() + "." + named.Obj().Name()
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_ = c.genStructExtended(t, over.TypeName, exts)
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} else {
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name := "unnamed"
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if exts != nil {
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for exts[name].Name == name {
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name = name + "X"
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}
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_ = c.genStructExtended(t, name, exts)
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}
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}
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return smartcontract.ArrayType, stackitem.StructT, over,
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&binding.ExtendedType{ // Value-less, refer to exts.
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Base: smartcontract.ArrayType,
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Name: over.TypeName,
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}
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case *types.Slice:
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if isByte(t.Elem()) {
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over.TypeName = "[]byte"
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return smartcontract.ByteArrayType, stackitem.ByteArrayT, over, nil
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}
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et := &binding.ExtendedType{
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Base: smartcontract.ArrayType,
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}
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vt, _, over, vet := c.scAndVMTypeFromType(t.Elem(), exts)
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et.Value = vet
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if et.Value == nil {
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et.Value = &binding.ExtendedType{
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Base: vt,
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}
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}
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if over.TypeName != "" {
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over.TypeName = "[]" + over.TypeName
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}
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return smartcontract.ArrayType, stackitem.ArrayT, over, et
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default:
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over.TypeName = "any"
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return smartcontract.AnyType, stackitem.AnyT, over, nil
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}
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}
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func (c *codegen) genStructExtended(t *types.Struct, name string, exts map[string]binding.ExtendedType) *binding.ExtendedType {
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var et *binding.ExtendedType
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if exts != nil {
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if exts[name].Name != name {
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et = &binding.ExtendedType{
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Base: smartcontract.ArrayType,
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Name: name,
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Fields: make([]binding.FieldExtendedType, t.NumFields()),
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}
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exts[name] = *et // Prefill to solve recursive structures.
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for i := range et.Fields {
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field := t.Field(i)
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ft, _, _, fet := c.scAndVMTypeFromType(field.Type(), exts)
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if fet == nil {
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et.Fields[i].ExtendedType.Base = ft
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} else {
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et.Fields[i].ExtendedType = *fet
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}
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et.Fields[i].Field = field.Name()
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}
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exts[name] = *et // Set real structure data.
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} else {
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et = new(binding.ExtendedType)
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*et = exts[name]
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}
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}
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return et
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}
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// MarshalJSON implements the json.Marshaler interface.
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func (d *DebugRange) MarshalJSON() ([]byte, error) {
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return []byte(`"` + strconv.FormatUint(uint64(d.Start), 10) + `-` +
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strconv.FormatUint(uint64(d.End), 10) + `"`), nil
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}
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// UnmarshalJSON implements the json.Unmarshaler interface.
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func (d *DebugRange) UnmarshalJSON(data []byte) error {
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startS, endS, err := parsePairJSON(data, "-")
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if err != nil {
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return err
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}
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start, err := strconv.ParseUint(startS, 10, 16)
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if err != nil {
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return err
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}
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end, err := strconv.ParseUint(endS, 10, 16)
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if err != nil {
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return err
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}
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d.Start = uint16(start)
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d.End = uint16(end)
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return nil
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}
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// MarshalJSON implements the json.Marshaler interface.
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func (d *DebugParam) MarshalJSON() ([]byte, error) {
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return []byte(`"` + d.Name + `,` + d.Type + `"`), nil
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}
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// UnmarshalJSON implements the json.Unmarshaler interface.
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func (d *DebugParam) UnmarshalJSON(data []byte) error {
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startS, endS, err := parsePairJSON(data, ",")
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if err != nil {
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return err
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}
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d.Name = startS
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d.Type = endS
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return nil
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}
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// ToManifestParameter converts DebugParam to manifest.Parameter.
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func (d *DebugParam) ToManifestParameter() manifest.Parameter {
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return manifest.Parameter{
|
|
Name: d.Name,
|
|
Type: d.TypeSC,
|
|
}
|
|
}
|
|
|
|
// ToManifestMethod converts MethodDebugInfo to manifest.Method.
|
|
func (m *MethodDebugInfo) ToManifestMethod() manifest.Method {
|
|
var (
|
|
result manifest.Method
|
|
)
|
|
parameters := make([]manifest.Parameter, len(m.Parameters))
|
|
for i, p := range m.Parameters {
|
|
parameters[i] = p.ToManifestParameter()
|
|
}
|
|
result.Name = m.Name.Name
|
|
result.Offset = int(m.Range.Start)
|
|
result.Parameters = parameters
|
|
result.ReturnType = m.ReturnTypeSC
|
|
return result
|
|
}
|
|
|
|
// MarshalJSON implements the json.Marshaler interface.
|
|
func (d *DebugMethodName) MarshalJSON() ([]byte, error) {
|
|
return []byte(`"` + d.Namespace + `,` + d.Name + `"`), nil
|
|
}
|
|
|
|
// UnmarshalJSON implements the json.Unmarshaler interface.
|
|
func (d *DebugMethodName) UnmarshalJSON(data []byte) error {
|
|
startS, endS, err := parsePairJSON(data, ",")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
d.Namespace = startS
|
|
d.Name = endS
|
|
|
|
return nil
|
|
}
|
|
|
|
// MarshalJSON implements the json.Marshaler interface.
|
|
func (d *DebugSeqPoint) MarshalJSON() ([]byte, error) {
|
|
s := fmt.Sprintf("%d[%d]%d:%d-%d:%d", d.Opcode, d.Document,
|
|
d.StartLine, d.StartCol, d.EndLine, d.EndCol)
|
|
return []byte(`"` + s + `"`), nil
|
|
}
|
|
|
|
// UnmarshalJSON implements the json.Unmarshaler interface.
|
|
func (d *DebugSeqPoint) UnmarshalJSON(data []byte) error {
|
|
_, err := fmt.Sscanf(string(data), `"%d[%d]%d:%d-%d:%d"`,
|
|
&d.Opcode, &d.Document, &d.StartLine, &d.StartCol, &d.EndLine, &d.EndCol)
|
|
return err
|
|
}
|
|
|
|
func parsePairJSON(data []byte, sep string) (string, string, error) {
|
|
var s string
|
|
if err := json.Unmarshal(data, &s); err != nil {
|
|
return "", "", err
|
|
}
|
|
ss := strings.SplitN(s, sep, 2)
|
|
if len(ss) != 2 {
|
|
return "", "", errors.New("invalid range format")
|
|
}
|
|
return ss[0], ss[1], nil
|
|
}
|
|
|
|
// ConvertToManifest converts a contract to the manifest.Manifest struct for debugger.
|
|
// Note: manifest is taken from the external source, however it can be generated ad-hoc. See #1038.
|
|
func (di *DebugInfo) ConvertToManifest(o *Options) (*manifest.Manifest, error) {
|
|
methods := make([]manifest.Method, 0)
|
|
for _, method := range di.Methods {
|
|
if method.IsExported && method.IsFunction && method.Name.Namespace == di.MainPkg {
|
|
mMethod := method.ToManifestMethod()
|
|
for i := range o.SafeMethods {
|
|
if mMethod.Name == o.SafeMethods[i] {
|
|
mMethod.Safe = true
|
|
break
|
|
}
|
|
}
|
|
methods = append(methods, mMethod)
|
|
}
|
|
}
|
|
|
|
result := manifest.NewManifest(o.Name)
|
|
if o.ContractSupportedStandards != nil {
|
|
result.SupportedStandards = o.ContractSupportedStandards
|
|
}
|
|
result.ABI = manifest.ABI{
|
|
Methods: methods,
|
|
Events: o.ContractEvents,
|
|
}
|
|
if result.ABI.Events == nil {
|
|
result.ABI.Events = make([]manifest.Event, 0)
|
|
}
|
|
result.Permissions = o.Permissions
|
|
for name, emitName := range o.Overloads {
|
|
m := result.ABI.GetMethod(name, -1)
|
|
if m == nil {
|
|
return nil, fmt.Errorf("overload for method %s was provided but it wasn't found", name)
|
|
}
|
|
if result.ABI.GetMethod(emitName, -1) == nil {
|
|
return nil, fmt.Errorf("overload with target method %s was provided but it wasn't found", emitName)
|
|
}
|
|
|
|
realM := result.ABI.GetMethod(emitName, len(m.Parameters))
|
|
if realM != nil {
|
|
return nil, fmt.Errorf("conflict overload for %s: "+
|
|
"multiple methods with the same number of parameters", name)
|
|
}
|
|
m.Name = emitName
|
|
// Check the resulting name against set of safe methods.
|
|
for i := range o.SafeMethods {
|
|
if m.Name == o.SafeMethods[i] {
|
|
m.Safe = true
|
|
break
|
|
}
|
|
}
|
|
}
|
|
return result, nil
|
|
}
|