some deletions

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / golang.org / x / tools@v0.0.0-20201105173854-bc9fc8d8c4bc / go / analysis / passes / atomicalign / atomicalign.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/atomicalign/atomicalign.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/atomicalign/atomicalign.go
deleted file mode 100644 (file)
index e2e1a4f..0000000
--- a/.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools@v0.0.0-20201105173854-bc9fc8d8c4bc/go/analysis/passes/atomicalign/atomicalign.go
+++ /dev/null
@@ -1,117 +0,0 @@
-// Copyright 2019 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 atomicalign defines an Analyzer that checks for non-64-bit-aligned
-// arguments to sync/atomic functions. On non-32-bit platforms, those functions
-// panic if their argument variables are not 64-bit aligned. It is therefore
-// the caller's responsibility to arrange for 64-bit alignment of such variables.
-// See https://golang.org/pkg/sync/atomic/#pkg-note-BUG
-package atomicalign
-
-import (
-       "go/ast"
-       "go/token"
-       "go/types"
-
-       "golang.org/x/tools/go/analysis"
-       "golang.org/x/tools/go/analysis/passes/inspect"
-       "golang.org/x/tools/go/analysis/passes/internal/analysisutil"
-       "golang.org/x/tools/go/ast/inspector"
-)
-
-const Doc = "check for non-64-bits-aligned arguments to sync/atomic functions"
-
-var Analyzer = &analysis.Analyzer{
-       Name:     "atomicalign",
-       Doc:      Doc,
-       Requires: []*analysis.Analyzer{inspect.Analyzer},
-       Run:      run,
-}
-
-func run(pass *analysis.Pass) (interface{}, error) {
-       if 8*pass.TypesSizes.Sizeof(types.Typ[types.Uintptr]) == 64 {
-               return nil, nil // 64-bit platform
-       }
-       if !analysisutil.Imports(pass.Pkg, "sync/atomic") {
-               return nil, nil // doesn't directly import sync/atomic
-       }
-
-       inspect := pass.ResultOf[inspect.Analyzer].(*inspector.Inspector)
-       nodeFilter := []ast.Node{
-               (*ast.CallExpr)(nil),
-       }
-
-       inspect.Preorder(nodeFilter, func(node ast.Node) {
-               call := node.(*ast.CallExpr)
-               sel, ok := call.Fun.(*ast.SelectorExpr)
-               if !ok {
-                       return
-               }
-               pkgIdent, ok := sel.X.(*ast.Ident)
-               if !ok {
-                       return
-               }
-               pkgName, ok := pass.TypesInfo.Uses[pkgIdent].(*types.PkgName)
-               if !ok || pkgName.Imported().Path() != "sync/atomic" {
-                       return
-               }
-
-               switch sel.Sel.Name {
-               case "AddInt64", "AddUint64",
-                       "LoadInt64", "LoadUint64",
-                       "StoreInt64", "StoreUint64",
-                       "SwapInt64", "SwapUint64",
-                       "CompareAndSwapInt64", "CompareAndSwapUint64":
-
-                       // For all the listed functions, the expression to check is always the first function argument.
-                       check64BitAlignment(pass, sel.Sel.Name, call.Args[0])
-               }
-       })
-
-       return nil, nil
-}
-
-func check64BitAlignment(pass *analysis.Pass, funcName string, arg ast.Expr) {
-       // Checks the argument is made of the address operator (&) applied to
-       // to a struct field (as opposed to a variable as the first word of
-       // uint64 and int64 variables can be relied upon to be 64-bit aligned.
-       unary, ok := arg.(*ast.UnaryExpr)
-       if !ok || unary.Op != token.AND {
-               return
-       }
-
-       // Retrieve the types.Struct in order to get the offset of the
-       // atomically accessed field.
-       sel, ok := unary.X.(*ast.SelectorExpr)
-       if !ok {
-               return
-       }
-       tvar, ok := pass.TypesInfo.Selections[sel].Obj().(*types.Var)
-       if !ok || !tvar.IsField() {
-               return
-       }
-
-       stype, ok := pass.TypesInfo.Types[sel.X].Type.Underlying().(*types.Struct)
-       if !ok {
-               return
-       }
-
-       var offset int64
-       var fields []*types.Var
-       for i := 0; i < stype.NumFields(); i++ {
-               f := stype.Field(i)
-               fields = append(fields, f)
-               if f == tvar {
-                       // We're done, this is the field we were looking for,
-                       // no need to fill the fields slice further.
-                       offset = pass.TypesSizes.Offsetsof(fields)[i]
-                       break
-               }
-       }
-       if offset&7 == 0 {
-               return // 64-bit aligned
-       }
-
-       pass.ReportRangef(arg, "address of non 64-bit aligned field .%s passed to atomic.%s", tvar.Name(), funcName)
-}