}

// dataWordFuncName returns the name of the function used to convert a value of type "from"
// to the data word of an interface.
// argType is the type the argument needs to be coerced to.
// needsaddr reports whether the value should be passed (needaddr==false) or its address (needsaddr==true).
func dataWordFuncName(from *types.Type) (fnname string, argType *types.Type, needsaddr bool) {

[compiler:gccgo] skip # gccgo has no cover tool

# Test cover for a package that has an assembly function.

go test -outputdir=$WORK -coverprofile=cover.out coverasm
go tool cover -func=$WORK/cover.out
stdout '\tg\t*100.0%' # Check g is 100% covered.
! stdout '\tf\t*[0-9]' # Check for no coverage on the assembly function

-- go.mod --
module coverasm

go 1.16
-- p.go --
package p

func f()

func g() {
	println("g")
}
-- p.s --

		}
	}
	return "", fmt.Errorf("internal error: unable to locate build action for package %q run action", p.ImportPath)
}

// WriteCoveragePercent writes out to the writer 'w' a "percent
// statements covered" for the package whose test-run action is
// 'runAct', based on the meta-data file 'mf'. This helper is used in
// cases where a user runs "go test -cover" on a package that has

env GOCOVERDIR=$SAVEGOCOVERDIR

# Examine the result.
go tool covdata percent -i=$WORK/covdata
stdout 'coverage: 100.0% of statements'

# By default we want to see packages resident in the module covered,
# but not dependencies.
go tool covdata textfmt -i=$WORK/covdata -o=$WORK/covdata/out.txt
grep 'mode: set' $WORK/covdata/out.txt
grep 'mod.example/main/main.go:' $WORK/covdata/out.txt

		if includeMain && p.Name == "main" && !haveMatch {
			haveMatch = true
			cmode = "regonly"
		}

		// Mark package for instrumentation.
		p.Internal.Cover.Mode = cmode
		covered = append(covered, p)

		// Force import of sync/atomic into package if atomic mode.
		if cfg.BuildCoverMode == "atomic" {
			EnsureImport(p, "sync/atomic")
		}

<!-- This is a new package; covered in 6-stdlib/3-structs.md. -->...

// if it were in the module with module path mpath and root mdir.
// If path is syntactically not within mpath,
// or if mdir is a local file tree (isLocal == true) and the directory
// that would hold path is in a sub-module (covered by a go.mod below mdir),
// dirInModule returns "", false, nil.
//
// Otherwise, dirInModule returns the name of the directory where
// Go source files would be expected, along with a boolean indicating

# statements in the packages matched by "./..."; package "a" (for
# example) has two statements so we expect 20.0% stmts covered. Go
# 1.19 would print 50% here (due to force importing of all ./...
# packages); prior to the fix for #58770 Go 1.20 would show 100%
# coverage. For packages "x" and "f" (which have no tests), check for
# 0% stmts covered (as opposed to "no test files").

go test -count=1 -coverprofile=cov.dat -coverpkg=./... ./...

	if p.rewriteCalls(f) {
		// Add `import _cgo_unsafe "unsafe"` after the package statement.
		f.Edit.Insert(f.offset(f.AST.Name.End()), "; import _cgo_unsafe \"unsafe\"")
	}
	p.rewriteRef(f)
}

// loadDefines coerces gcc into spitting out the #defines in use
// in the file f and saves relevant renamings in f.Name[name].Define.
func (p *Package) loadDefines(f *File) {
	var b bytes.Buffer
	b.WriteString(builtinProlog)

		func(r *Reader, delim byte) ([]byte, error) {
			data, err := r.ReadString(delim)
			return []byte(data), err
		},
		// ReadLine doesn't fit the data/pattern easily
		// so we leave it out. It should be covered via
		// the ReadSlice test since ReadLine simply calls
		// ReadSlice, and it's that function that handles
		// the last byte.
	}

	// Try all readers with UnreadByte.
	for rno, read := range readers {