| // UNREVIEWED |
| |
| // 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" |
| "strings" |
| ) |
| |
| // EnableSync controls whether sync markers are written into unified |
| // IR's export data format and also whether they're expected when |
| // reading them back in. They're inessential to the correct |
| // functioning of unified IR, but are helpful during development to |
| // detect mistakes. |
| // |
| // When sync is enabled, writer stack frames will also be included in |
| // the export data. Currently, a fixed number of frames are included, |
| // controlled by -d=syncframes (default 0). |
| const EnableSync = true |
| |
| // 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) |
| |
| // 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 |
| 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 |
| ) |
