d5e00a583d
Support multiple file / directory tables for multiple compilation units. - added a type DebugLines that can hold number of DebugLineInfo - added a supporting attribute to DebugLineInfo called 'Lookup' which is to be used to quickly lookup if file exists in FileNames slice - added supporting methods to lookup and return corresponding DebugLineInfo - changed the debug_line parsing behavior to read all the available tables and push them to DebugLines - since Process.lineInfo is now a slice, it was breaking AllPCsBetween as well - updated that function's definition to accept a new filename parameter to be able to extract related DebugLineInfo - updated calls to AllPCsBetween - fixed tests that were broken due to attribute type change in Process - updated _fixtures/cgotest program to include stdio.h, so that it updates .debug_line header - added a test to check 'next' in a cgo binary - OSX - 1.4 does not support cgo, handle that in new testcase
105 lines
2.3 KiB
Go
105 lines
2.3 KiB
Go
package line
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import (
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"debug/elf"
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"debug/macho"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"testing"
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"github.com/davecheney/profile"
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)
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func grabDebugLineSection(p string, t *testing.T) []byte {
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f, err := os.Open(p)
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if err != nil {
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t.Fatal(err)
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}
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defer f.Close()
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ef, err := elf.NewFile(f)
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if err == nil {
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data, _ := ef.Section(".debug_line").Data()
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return data
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}
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mf, _ := macho.NewFile(f)
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data, _ := mf.Section("__debug_line").Data()
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return data
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}
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func TestDebugLinePrologueParser(t *testing.T) {
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// Test against known good values, from readelf --debug-dump=rawline _fixtures/testnextprog
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p, err := filepath.Abs("../../_fixtures/testnextprog")
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if err != nil {
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t.Fatal(err)
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}
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err = exec.Command("go", "build", "-gcflags=-N -l", "-o", p, p+".go").Run()
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if err != nil {
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t.Fatal("Could not compile test file", p, err)
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}
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defer os.Remove(p)
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data := grabDebugLineSection(p, t)
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debugLines := Parse(data)
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dbl := debugLines[0]
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prologue := dbl.Prologue
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if prologue.Version != uint16(2) {
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t.Fatal("Version not parsed correctly", prologue.Version)
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}
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if prologue.MinInstrLength != uint8(1) {
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t.Fatal("Minimun Instruction Length not parsed correctly", prologue.MinInstrLength)
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}
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if prologue.InitialIsStmt != uint8(1) {
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t.Fatal("Initial value of 'is_stmt' not parsed correctly", prologue.InitialIsStmt)
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}
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if prologue.LineBase != int8(-1) {
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t.Fatal("Line base not parsed correctly", prologue.LineBase)
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}
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if prologue.LineRange != uint8(4) {
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t.Fatal("Line Range not parsed correctly", prologue.LineRange)
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}
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if prologue.OpcodeBase != uint8(10) {
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t.Fatal("Opcode Base not parsed correctly", prologue.OpcodeBase)
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}
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lengths := []uint8{0, 1, 1, 1, 1, 0, 0, 0, 1}
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for i, l := range prologue.StdOpLengths {
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if l != lengths[i] {
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t.Fatal("Length not parsed correctly", l)
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}
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}
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if len(dbl.IncludeDirs) != 0 {
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t.Fatal("Include dirs not parsed correctly")
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}
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if !strings.Contains(dbl.FileNames[0].Name, "/delve/_fixtures/testnextprog.go") {
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t.Fatal("First file entry not parsed correctly")
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}
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}
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func BenchmarkLineParser(b *testing.B) {
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defer profile.Start(profile.MemProfile).Stop()
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p, err := filepath.Abs("../../_fixtures/testnextprog")
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if err != nil {
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b.Fatal(err)
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}
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data := grabDebugLineSection(p, nil)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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_ = Parse(data)
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}
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}
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