cmd/vendor: import vet fixes from x/tools

Fixes build - I did not understand that vetall was
effectively pinned to a vet version by cmd/go.mod.

Change-Id: I56bfd8f62eadacc97cad0ed48e41a178bbc18b8f
Reviewed-on: https://go-review.googlesource.com/c/go/+/176179
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/go.mod

@@ -8,5 +8,5 @@ require (
 	golang.org/x/arch v0.0.0-20181203225421-5a4828bb7045
 	golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c
 	golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82 // indirect
-	golang.org/x/tools v0.0.0-20190325223049-1d95b17f1b04
+	golang.org/x/tools v0.0.0-20190509153222-73554e0f7805
 )

src/cmd/go.sum

@@ -8,9 +8,10 @@ golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c h1:Vj5n4GlwjmQteupaxJ9+0FNOmBrHfq7vN4btdGoDZgI=
 golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82 h1:vsphBvatvfbhlb4PO1BYSr9dzugGxJ/SQHoNufZJq1w=
 golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/tools v0.0.0-20190325223049-1d95b17f1b04 h1:SRYGE+BqJRgY8JH4p2NmwTPeuREKqKYw5IuEmthTHKQ=
-golang.org/x/tools v0.0.0-20190325223049-1d95b17f1b04/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190509153222-73554e0f7805 h1:1ufBXAsTpUhSmmPXEEs5PrGQSfnBhsjAd2SmVhp9xrY=
+golang.org/x/tools v0.0.0-20190509153222-73554e0f7805/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=

src/cmd/vendor/golang.org/x/tools/go/analysis/analysis.go

@@ -128,10 +128,32 @@ type Pass struct {
 	// See comments for ExportObjectFact.
 	ExportPackageFact func(fact Fact)
 
+	// AllPackageFacts returns a new slice containing all package facts in unspecified order.
+	// WARNING: This is an experimental API and may change in the future.
+	AllPackageFacts func() []PackageFact
+
+	// AllObjectFacts returns a new slice containing all object facts in unspecified order.
+	// WARNING: This is an experimental API and may change in the future.
+	AllObjectFacts func() []ObjectFact
+
 	/* Further fields may be added in future. */
 	// For example, suggested or applied refactorings.
 }
 
+// PackageFact is a package together with an associated fact.
+// WARNING: This is an experimental API and may change in the future.
+type PackageFact struct {
+	Package *types.Package
+	Fact    Fact
+}
+
+// ObjectFact is an object together with an associated fact.
+// WARNING: This is an experimental API and may change in the future.
+type ObjectFact struct {
+	Object types.Object
+	Fact   Fact
+}
+
 // Reportf is a helper function that reports a Diagnostic using the
 // specified position and formatted error message.
 func (pass *Pass) Reportf(pos token.Pos, format string, args ...interface{}) {

src/cmd/vendor/golang.org/x/tools/go/analysis/passes/asmdecl/asmdecl.go

@@ -130,7 +130,7 @@ var (
 	asmPlusBuild = re(`//\s+\+build\s+([^\n]+)`)
 	asmTEXT      = re(`\bTEXT\b(.*)·([^\(]+)\(SB\)(?:\s*,\s*([0-9A-Z|+()]+))?(?:\s*,\s*\$(-?[0-9]+)(?:-([0-9]+))?)?`)
 	asmDATA      = re(`\b(DATA|GLOBL)\b`)
-	asmNamedFP   = re(`([a-zA-Z0-9_\xFF-\x{10FFFF}]+)(?:\+([0-9]+))\(FP\)`)
+	asmNamedFP   = re(`\$?([a-zA-Z0-9_\xFF-\x{10FFFF}]+)(?:\+([0-9]+))\(FP\)`)
 	asmUnnamedFP = re(`[^+\-0-9](([0-9]+)\(FP\))`)
 	asmSP        = re(`[^+\-0-9](([0-9]+)\(([A-Z0-9]+)\))`)
 	asmOpcode    = re(`^\s*(?:[A-Z0-9a-z_]+:)?\s*([A-Z]+)\s*([^,]*)(?:,\s*(.*))?`)
@@ -184,6 +184,7 @@ Files:
 			fnName             string
 			localSize, argSize int
 			wroteSP            bool
+			noframe            bool
 			haveRetArg         bool
 			retLine            []int
 		)
@@ -231,6 +232,11 @@ Files:
 				}
 			}
 
+			// Ignore comments and commented-out code.
+			if i := strings.Index(line, "//"); i >= 0 {
+				line = line[:i]
+			}
+
 			if m := asmTEXT.FindStringSubmatch(line); m != nil {
 				flushRet()
 				if arch == "" {
@@ -254,7 +260,7 @@ Files:
 					// identifiers to represent the directory separator.
 					pkgPath = strings.Replace(pkgPath, "∕", "/", -1)
 					if pkgPath != pass.Pkg.Path() {
-						log.Printf("%s:%d: [%s] cannot check cross-package assembly function: %s is in package %s", fname, lineno, arch, fnName, pkgPath)
+						// log.Printf("%s:%d: [%s] cannot check cross-package assembly function: %s is in package %s", fname, lineno, arch, fnName, pkgPath)
 						fn = nil
 						fnName = ""
 						continue
@@ -275,7 +281,8 @@ Files:
 					localSize += archDef.intSize
 				}
 				argSize, _ = strconv.Atoi(m[5])
-				if fn == nil && !strings.Contains(fnName, "<>") {
+				noframe = strings.Contains(flag, "NOFRAME")
+				if fn == nil && !strings.Contains(fnName, "<>") && !noframe {
 					badf("function %s missing Go declaration", fnName)
 				}
 				wroteSP = false
@@ -305,13 +312,18 @@ Files:
 				continue
 			}
 
-			if strings.Contains(line, ", "+archDef.stack) || strings.Contains(line, ",\t"+archDef.stack) {
+			if strings.Contains(line, ", "+archDef.stack) || strings.Contains(line, ",\t"+archDef.stack) || strings.Contains(line, "NOP "+archDef.stack) || strings.Contains(line, "NOP\t"+archDef.stack) {
 				wroteSP = true
 				continue
 			}
 
+			if arch == "wasm" && strings.Contains(line, "CallImport") {
+				// CallImport is a call out to magic that can write the result.
+				haveRetArg = true
+			}
+
 			for _, m := range asmSP.FindAllStringSubmatch(line, -1) {
-				if m[3] != archDef.stack || wroteSP {
+				if m[3] != archDef.stack || wroteSP || noframe {
 					continue
 				}
 				off := 0
@@ -371,7 +383,7 @@ Files:
 					}
 					continue
 				}
-				asmCheckVar(badf, fn, line, m[0], off, v)
+				asmCheckVar(badf, fn, line, m[0], off, v, archDef)
 			}
 		}
 		flushRet()
@@ -589,7 +601,7 @@ func asmParseDecl(pass *analysis.Pass, decl *ast.FuncDecl) map[string]*asmFunc {
 }
 
 // asmCheckVar checks a single variable reference.
-func asmCheckVar(badf func(string, ...interface{}), fn *asmFunc, line, expr string, off int, v *asmVar) {
+func asmCheckVar(badf func(string, ...interface{}), fn *asmFunc, line, expr string, off int, v *asmVar, archDef *asmArch) {
 	m := asmOpcode.FindStringSubmatch(line)
 	if m == nil {
 		if !strings.HasPrefix(strings.TrimSpace(line), "//") {
@@ -598,6 +610,8 @@ func asmCheckVar(badf func(string, ...interface{}), fn *asmFunc, line, expr stri
 		return
 	}
 
+	addr := strings.HasPrefix(expr, "$")
+
 	// Determine operand sizes from instruction.
 	// Typically the suffix suffices, but there are exceptions.
 	var src, dst, kind asmKind
@@ -617,10 +631,13 @@ func asmCheckVar(badf func(string, ...interface{}), fn *asmFunc, line, expr stri
 	// They just take the address of it.
 	case "386.LEAL":
 		dst = 4
+		addr = true
 	case "amd64.LEAQ":
 		dst = 8
+		addr = true
 	case "amd64p32.LEAL":
 		dst = 4
+		addr = true
 	default:
 		switch fn.arch.name {
 		case "386", "amd64":
@@ -725,6 +742,11 @@ func asmCheckVar(badf func(string, ...interface{}), fn *asmFunc, line, expr stri
 		vs = v.inner[0].size
 		vt = v.inner[0].typ
 	}
+	if addr {
+		vk = asmKind(archDef.ptrSize)
+		vs = archDef.ptrSize
+		vt = "address"
+	}
 
 	if off != v.off {
 		var inner bytes.Buffer

src/cmd/vendor/golang.org/x/tools/go/analysis/passes/lostcancel/lostcancel.go

@@ -45,6 +45,8 @@ var contextPackage = "context"
 // control-flow path from the call to a return statement and that path
 // does not "use" the cancel function.  Any reference to the variable
 // counts as a use, even within a nested function literal.
+// If the variable's scope is larger than the function
+// containing the assignment, we assume that other uses exist.
 //
 // checkLostCancel analyzes a single named or literal function.
 func run(pass *analysis.Pass) (interface{}, error) {
@@ -66,6 +68,15 @@ func run(pass *analysis.Pass) (interface{}, error) {
 }
 
 func runFunc(pass *analysis.Pass, node ast.Node) {
+	// Find scope of function node
+	var funcScope *types.Scope
+	switch v := node.(type) {
+	case *ast.FuncLit:
+		funcScope = pass.TypesInfo.Scopes[v.Type]
+	case *ast.FuncDecl:
+		funcScope = pass.TypesInfo.Scopes[v.Type]
+	}
+
 	// Maps each cancel variable to its defining ValueSpec/AssignStmt.
 	cancelvars := make(map[*types.Var]ast.Node)
 
@@ -114,7 +125,11 @@ func runFunc(pass *analysis.Pass, node ast.Node) {
 					"the cancel function returned by context.%s should be called, not discarded, to avoid a context leak",
 					n.(*ast.SelectorExpr).Sel.Name)
 			} else if v, ok := pass.TypesInfo.Uses[id].(*types.Var); ok {
+				// If the cancel variable is defined outside function scope,
+				// do not analyze it.
+				if funcScope.Contains(v.Pos()) {
 					cancelvars[v] = stmt
+				}
 			} else if v, ok := pass.TypesInfo.Defs[id].(*types.Var); ok {
 				cancelvars[v] = stmt
 			}

src/cmd/vendor/golang.org/x/tools/go/analysis/passes/printf/printf.go

@@ -856,20 +856,28 @@ func recursiveStringer(pass *analysis.Pass, e ast.Expr) bool {
 		return false
 	}
 
-	// Is it the receiver r, or &r?
-	recv := stringMethod.Type().(*types.Signature).Recv()
-	if recv == nil {
+	sig := stringMethod.Type().(*types.Signature)
+	if !isStringer(sig) {
 		return false
 	}
+
+	// Is it the receiver r, or &r?
 	if u, ok := e.(*ast.UnaryExpr); ok && u.Op == token.AND {
 		e = u.X // strip off & from &r
 	}
 	if id, ok := e.(*ast.Ident); ok {
-		return pass.TypesInfo.Uses[id] == recv
+		return pass.TypesInfo.Uses[id] == sig.Recv()
 	}
 	return false
 }
 
+// isStringer reports whether the method signature matches the String() definition in fmt.Stringer.
+func isStringer(sig *types.Signature) bool {
+	return sig.Params().Len() == 0 &&
+		sig.Results().Len() == 1 &&
+		sig.Results().At(0).Type() == types.Typ[types.String]
+}
+
 // isFunctionValue reports whether the expression is a function as opposed to a function call.
 // It is almost always a mistake to print a function value.
 func isFunctionValue(pass *analysis.Pass, e ast.Expr) bool {

src/cmd/vendor/golang.org/x/tools/go/analysis/passes/stdmethods/stdmethods.go

@@ -116,6 +116,13 @@ func canonicalMethod(pass *analysis.Pass, id *ast.Ident) {
 	args := sign.Params()
 	results := sign.Results()
 
+	// Special case: WriteTo with more than one argument,
+	// not trying at all to implement io.WriterTo,
+	// comes up often enough to skip.
+	if id.Name == "WriteTo" && args.Len() > 1 {
+		return
+	}
+
 	// Do the =s (if any) all match?
 	if !matchParams(pass, expect.args, args, "=") || !matchParams(pass, expect.results, results, "=") {
 		return

src/cmd/vendor/golang.org/x/tools/go/analysis/passes/structtag/structtag.go

@@ -56,6 +56,13 @@ var checkTagSpaces = map[string]bool{"json": true, "xml": true, "asn1": true}
 
 // checkCanonicalFieldTag checks a single struct field tag.
 func checkCanonicalFieldTag(pass *analysis.Pass, field *types.Var, tag string, seen *map[[2]string]token.Pos) {
+	switch pass.Pkg.Path() {
+	case "encoding/json", "encoding/xml":
+		// These packages know how to use their own APIs.
+		// Sometimes they are testing what happens to incorrect programs.
+		return
+	}
+
 	for _, key := range checkTagDups {
 		checkTagDuplicates(pass, tag, key, field, field, seen)
 	}

src/cmd/vendor/golang.org/x/tools/go/analysis/passes/unmarshal/unmarshal.go

@@ -29,6 +29,13 @@ var Analyzer = &analysis.Analyzer{
 }
 
 func run(pass *analysis.Pass) (interface{}, error) {
+	switch pass.Pkg.Path() {
+	case "encoding/gob", "encoding/json", "encoding/xml":
+		// These packages know how to use their own APIs.
+		// Sometimes they are testing what happens to incorrect programs.
+		return nil, nil
+	}
+
 	inspect := pass.ResultOf[inspect.Analyzer].(*inspector.Inspector)
 
 	nodeFilter := []ast.Node{

src/cmd/vendor/modules.txt

@@ -26,7 +26,7 @@ golang.org/x/crypto/ssh/terminal
 # golang.org/x/sys v0.0.0-20190502175342-a43fa875dd82
 golang.org/x/sys/unix
 golang.org/x/sys/windows
-# golang.org/x/tools v0.0.0-20190325223049-1d95b17f1b04
+# golang.org/x/tools v0.0.0-20190509153222-73554e0f7805
 golang.org/x/tools/go/analysis
 golang.org/x/tools/go/analysis/internal/analysisflags
 golang.org/x/tools/go/analysis/internal/facts

src/cmd/vet/all/main.go

@@ -233,7 +233,7 @@ func (p platform) vet() {
 		vetTool := filepath.Join(tmpdir, "vet")
 		vetCmd = []string{
 			vetTool,
-			"-nilness=0", // expensive, uses SSA
+			// "-nilness=0", // expensive, uses SSA
 		}
 
 		cmd := exec.Command(cmdGoPath, "build", "-o", vetTool, "golang.org/x/tools/go/analysis/cmd/vet")