453 lines
13 KiB
Go
453 lines
13 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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"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/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
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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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Documents []string `json:"documents"`
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Methods []MethodDebugInfo `json:"methods"`
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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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// StaticVariables contains 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 method is exported.
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IsExported bool `json:"-"`
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// IsFunction defines whether 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 method's parameters.
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Parameters []DebugParam `json:"params"`
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// ReturnType is method's return type.
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ReturnType string `json:"return"`
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// ReturnTypeSC is 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 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 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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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.program.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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MainPkg: c.mainPkg.Pkg.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.Pkg.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.Pkg.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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for name, scope := range c.funcs {
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m := c.methodInfoFromScope(name, scope)
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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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d.EmittedEvents = c.emittedEvents
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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)
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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) *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 := c.scAndVMTypeFromExpr(ps.List[i].Type)
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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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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 := c.scAndVMReturnTypeFromScope(scope)
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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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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) (smartcontract.ParamType, string) {
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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"
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case 1:
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st, vt := c.scAndVMTypeFromExpr(results.List[0].Type)
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return st, vt.String()
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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"
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}
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}
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func scAndVMInteropTypeFromExpr(named *types.Named) (smartcontract.ParamType, stackitem.Type) {
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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", "contract":
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return smartcontract.ArrayType, stackitem.ArrayT // Block, Transaction, Contract
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case "interop":
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if name != "Interface" {
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switch name {
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case "Hash160":
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return smartcontract.Hash160Type, stackitem.ByteArrayT
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case "Hash256":
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return smartcontract.Hash256Type, stackitem.ByteArrayT
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case "PublicKey":
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return smartcontract.PublicKeyType, stackitem.ByteArrayT
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case "Signature":
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return smartcontract.SignatureType, stackitem.ByteArrayT
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}
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}
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}
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return smartcontract.InteropInterfaceType, stackitem.InteropT
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}
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func (c *codegen) scAndVMTypeFromExpr(typ ast.Expr) (smartcontract.ParamType, stackitem.Type) {
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t := c.typeOf(typ)
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if c.typeOf(typ) == nil {
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return smartcontract.AnyType, stackitem.AnyT
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}
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if named, ok := t.(*types.Named); ok {
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if isInteropPath(named.String()) {
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return scAndVMInteropTypeFromExpr(named)
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}
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}
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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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return smartcontract.IntegerType, stackitem.IntegerT
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case info&types.IsBoolean != 0:
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return smartcontract.BoolType, stackitem.BooleanT
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case info&types.IsString != 0:
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return smartcontract.StringType, stackitem.ByteArrayT
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default:
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return smartcontract.AnyType, stackitem.AnyT
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}
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case *types.Map:
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return smartcontract.MapType, stackitem.MapT
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case *types.Struct:
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return smartcontract.ArrayType, stackitem.StructT
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case *types.Slice:
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if isByte(t.Elem()) {
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return smartcontract.ByteArrayType, stackitem.ByteArrayT
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}
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return smartcontract.ArrayType, stackitem.ArrayT
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default:
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return smartcontract.AnyType, stackitem.AnyT
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}
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}
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// MarshalJSON implements 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 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 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 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{
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Name: d.Name,
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Type: d.TypeSC,
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}
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}
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// ToManifestMethod converts MethodDebugInfo to manifest.Method.
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func (m *MethodDebugInfo) ToManifestMethod() manifest.Method {
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var (
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result manifest.Method
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)
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parameters := make([]manifest.Parameter, len(m.Parameters))
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for i, p := range m.Parameters {
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parameters[i] = p.ToManifestParameter()
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}
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result.Name = m.Name.Name
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result.Offset = int(m.Range.Start)
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result.Parameters = parameters
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result.ReturnType = m.ReturnTypeSC
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return result
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}
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// MarshalJSON implements json.Marshaler interface.
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func (d *DebugMethodName) MarshalJSON() ([]byte, error) {
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return []byte(`"` + d.Namespace + `,` + d.Name + `"`), nil
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}
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// UnmarshalJSON implements json.Unmarshaler interface.
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func (d *DebugMethodName) 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.Namespace = startS
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d.Name = endS
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return nil
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}
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// MarshalJSON implements json.Marshaler interface.
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func (d *DebugSeqPoint) MarshalJSON() ([]byte, error) {
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s := fmt.Sprintf("%d[%d]%d:%d-%d:%d", d.Opcode, d.Document,
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d.StartLine, d.StartCol, d.EndLine, d.EndCol)
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return []byte(`"` + s + `"`), nil
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}
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// UnmarshalJSON implements json.Unmarshaler interface.
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func (d *DebugSeqPoint) UnmarshalJSON(data []byte) error {
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_, err := fmt.Sscanf(string(data), `"%d[%d]%d:%d-%d:%d"`,
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&d.Opcode, &d.Document, &d.StartLine, &d.StartCol, &d.EndLine, &d.EndCol)
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return err
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}
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func parsePairJSON(data []byte, sep string) (string, string, error) {
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var s string
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if err := json.Unmarshal(data, &s); err != nil {
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return "", "", err
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}
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ss := strings.SplitN(s, sep, 2)
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if len(ss) != 2 {
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return "", "", errors.New("invalid range format")
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}
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return ss[0], ss[1], nil
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}
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// ConvertToManifest converts contract to the manifest.Manifest struct for debugger.
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// Note: manifest is taken from the external source, however it can be generated ad-hoc. See #1038.
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func (di *DebugInfo) ConvertToManifest(o *Options) (*manifest.Manifest, error) {
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methods := make([]manifest.Method, 0)
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for _, method := range di.Methods {
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if method.IsExported && method.IsFunction && method.Name.Namespace == di.MainPkg {
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mMethod := method.ToManifestMethod()
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for i := range o.SafeMethods {
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if mMethod.Name == o.SafeMethods[i] {
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mMethod.Safe = true
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break
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}
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}
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methods = append(methods, mMethod)
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}
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}
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result := manifest.NewManifest(o.Name)
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if o.ContractSupportedStandards != nil {
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result.SupportedStandards = o.ContractSupportedStandards
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}
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result.ABI = manifest.ABI{
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Methods: methods,
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Events: o.ContractEvents,
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}
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if result.ABI.Events == nil {
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result.ABI.Events = make([]manifest.Event, 0)
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}
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result.Permissions = []manifest.Permission{
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{
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Contract: manifest.PermissionDesc{
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Type: manifest.PermissionWildcard,
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},
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Methods: manifest.WildStrings{},
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},
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}
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return result, nil
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}
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