f1e5a70a4b
I decided to vendor all debug/dwarf and debug/elf files so that the project can be go get-table. All changes that I am waiting to land in Go 1.4 are now captured in /vendor/debug/*.
104 lines
2.2 KiB
Go
104 lines
2.2 KiB
Go
package line
|
|
|
|
import (
|
|
"debug/elf"
|
|
"os"
|
|
"os/exec"
|
|
"path/filepath"
|
|
"strings"
|
|
"testing"
|
|
|
|
"github.com/davecheney/profile"
|
|
)
|
|
|
|
func grabDebugLineSection(p string, t *testing.T) []byte {
|
|
f, err := os.Open(p)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer f.Close()
|
|
|
|
ef, err := elf.NewFile(f)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
data, err := ef.Section(".debug_line").Data()
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
return data
|
|
}
|
|
|
|
func TestDebugLinePrologueParser(t *testing.T) {
|
|
// Test against known good values, from readelf --debug-dump=rawline _fixtures/testnextprog
|
|
p, err := filepath.Abs("../../_fixtures/testnextprog")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
err = exec.Command("go", "build", "-gcflags=-N -l", "-o", p, p+".go").Run()
|
|
if err != nil {
|
|
t.Fatal("Could not compile test file", p, err)
|
|
}
|
|
defer os.Remove(p)
|
|
data := grabDebugLineSection(p, t)
|
|
dbl := Parse(data)
|
|
prologue := dbl.Prologue
|
|
|
|
if prologue.Version != uint16(2) {
|
|
t.Fatal("Version not parsed correctly", prologue.Version)
|
|
}
|
|
|
|
if prologue.MinInstrLength != uint8(1) {
|
|
t.Fatal("Minimun Instruction Length not parsed correctly", prologue.MinInstrLength)
|
|
}
|
|
|
|
if prologue.InitialIsStmt != uint8(1) {
|
|
t.Fatal("Initial value of 'is_stmt' not parsed correctly", prologue.InitialIsStmt)
|
|
}
|
|
|
|
if prologue.LineBase != int8(-1) {
|
|
t.Fatal("Line base not parsed correctly", prologue.LineBase)
|
|
}
|
|
|
|
if prologue.LineRange != uint8(4) {
|
|
t.Fatal("Line Range not parsed correctly", prologue.LineRange)
|
|
}
|
|
|
|
if prologue.OpcodeBase != uint8(10) {
|
|
t.Fatal("Opcode Base not parsed correctly", prologue.OpcodeBase)
|
|
}
|
|
|
|
lengths := []uint8{0, 1, 1, 1, 1, 0, 0, 0, 1}
|
|
for i, l := range prologue.StdOpLengths {
|
|
if l != lengths[i] {
|
|
t.Fatal("Length not parsed correctly", l)
|
|
}
|
|
}
|
|
|
|
if len(dbl.IncludeDirs) != 0 {
|
|
t.Fatal("Include dirs not parsed correctly")
|
|
}
|
|
|
|
if !strings.Contains(dbl.FileNames[0].Name, "/dbg/_fixtures/testnextprog.go") {
|
|
t.Fatal("First entry not parsed correctly")
|
|
}
|
|
}
|
|
|
|
func BenchmarkLineParser(b *testing.B) {
|
|
defer profile.Start(profile.MemProfile).Stop()
|
|
p, err := filepath.Abs("../../_fixtures/testnextprog")
|
|
if err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
|
|
data := grabDebugLineSection(p, nil)
|
|
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
_ = Parse(data)
|
|
}
|
|
}
|