blob: 1081f83f6d278d9feb20819fd9e97fd1b6d0fd62 [file] [log] [blame]
package ssa_test
import (
"debug/dwarf"
"debug/elf"
"debug/macho"
"debug/pe"
"fmt"
"internal/testenv"
"io"
"runtime"
"testing"
)
func open(path string) (*dwarf.Data, error) {
if fh, err := elf.Open(path); err == nil {
return fh.DWARF()
}
if fh, err := pe.Open(path); err == nil {
return fh.DWARF()
}
if fh, err := macho.Open(path); err == nil {
return fh.DWARF()
}
return nil, fmt.Errorf("unrecognized executable format")
}
func must(err error) {
if err != nil {
panic(err)
}
}
type Line struct {
File string
Line int
}
func TestStmtLines(t *testing.T) {
if runtime.GOOS == "plan9" {
t.Skip("skipping on plan9; no DWARF symbol table in executables")
}
lines := map[Line]bool{}
dw, err := open(testenv.GoToolPath(t))
must(err)
rdr := dw.Reader()
rdr.Seek(0)
for {
e, err := rdr.Next()
must(err)
if e == nil {
break
}
if e.Tag != dwarf.TagCompileUnit {
continue
}
pkgname, _ := e.Val(dwarf.AttrName).(string)
if pkgname == "runtime" {
continue
}
lrdr, err := dw.LineReader(e)
must(err)
var le dwarf.LineEntry
for {
err := lrdr.Next(&le)
if err == io.EOF {
break
}
must(err)
fl := Line{le.File.Name, le.Line}
lines[fl] = lines[fl] || le.IsStmt
}
}
nonStmtLines := []Line{}
for line, isstmt := range lines {
if !isstmt {
nonStmtLines = append(nonStmtLines, line)
}
}
if runtime.GOARCH == "amd64" && len(nonStmtLines)*100 > len(lines) { // > 99% obtained on amd64, no backsliding
t.Errorf("Saw too many (amd64, > 1%%) lines without statement marks, total=%d, nostmt=%d\n", len(lines), len(nonStmtLines))
}
if len(nonStmtLines)*100 > 2*len(lines) { // expect 98% elsewhere.
t.Errorf("Saw too many (not amd64, > 2%%) lines without statement marks, total=%d, nostmt=%d\n", len(lines), len(nonStmtLines))
}
t.Logf("total=%d, nostmt=%d\n", len(lines), len(nonStmtLines))
}