Editando: sync.go
// Copyright 2021 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package pkgbits import ( "fmt" "runtime" "strings" ) // fmtFrames formats a backtrace for reporting reader/writer desyncs. func fmtFrames(pcs ...uintptr) []string { res := make([]string, 0, len(pcs)) walkFrames(pcs, func(file string, line int, name string, offset uintptr) { // Trim package from function name. It's just redundant noise. name = strings.TrimPrefix(name, "cmd/compile/internal/noder.") res = append(res, fmt.Sprintf("%s:%v: %s +0x%v", file, line, name, offset)) }) return res } type frameVisitor func(file string, line int, name string, offset uintptr) // walkFrames calls visit for each call frame represented by pcs. // // pcs should be a slice of PCs, as returned by runtime.Callers. func walkFrames(pcs []uintptr, visit frameVisitor) { if len(pcs) == 0 { return } frames := runtime.CallersFrames(pcs) for { frame, more := frames.Next() visit(frame.File, frame.Line, frame.Function, frame.PC-frame.Entry) if !more { return } } } // SyncMarker is an enum type that represents markers that may be // written to export data to ensure the reader and writer stay // synchronized. type SyncMarker int //go:generate stringer -type=SyncMarker -trimprefix=Sync const ( _ SyncMarker = iota // Public markers (known to go/types importers). // Low-level coding markers. SyncEOF SyncBool SyncInt64 SyncUint64 SyncString SyncValue SyncVal SyncRelocs SyncReloc SyncUseReloc // Higher-level object and type markers. SyncPublic SyncPos SyncPosBase SyncObject SyncObject1 SyncPkg SyncPkgDef SyncMethod SyncType SyncTypeIdx SyncTypeParamNames SyncSignature SyncParams SyncParam SyncCodeObj SyncSym SyncLocalIdent SyncSelector // Private markers (only known to cmd/compile). SyncPrivate SyncFuncExt SyncVarExt SyncTypeExt SyncPragma SyncExprList SyncExprs SyncExpr SyncExprType SyncAssign SyncOp SyncFuncLit SyncCompLit SyncDecl SyncFuncBody SyncOpenScope SyncCloseScope SyncCloseAnotherScope SyncDeclNames SyncDeclName SyncStmts SyncBlockStmt SyncIfStmt SyncForStmt SyncSwitchStmt SyncRangeStmt SyncCaseClause SyncCommClause SyncSelectStmt SyncDecls SyncLabeledStmt SyncUseObjLocal SyncAddLocal SyncLinkname SyncStmt1 SyncStmtsEnd SyncLabel SyncOptLabel SyncMultiExpr SyncRType SyncConvRTTI )
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