mirror of
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315 lines
9.2 KiB
Go
315 lines
9.2 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package dwarf_test
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import (
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. "debug/dwarf"
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"io"
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"strings"
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"testing"
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)
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var (
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file1C = &LineFile{Name: "/home/austin/go.dev/src/debug/dwarf/testdata/line1.c"}
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file1H = &LineFile{Name: "/home/austin/go.dev/src/debug/dwarf/testdata/line1.h"}
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file2C = &LineFile{Name: "/home/austin/go.dev/src/debug/dwarf/testdata/line2.c"}
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)
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func TestLineELFGCC(t *testing.T) {
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// Generated by:
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// # gcc --version | head -n1
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// gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2
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// # gcc -g -o line-gcc.elf line*.c
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// Line table based on readelf --debug-dump=rawline,decodedline
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want := []LineEntry{
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{Address: 0x40059d, File: file1H, Line: 2, IsStmt: true},
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{Address: 0x4005a5, File: file1H, Line: 2, IsStmt: true},
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{Address: 0x4005b4, File: file1H, Line: 5, IsStmt: true},
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{Address: 0x4005bd, File: file1H, Line: 6, IsStmt: true, Discriminator: 2},
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{Address: 0x4005c7, File: file1H, Line: 5, IsStmt: true, Discriminator: 2},
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{Address: 0x4005cb, File: file1H, Line: 5, IsStmt: false, Discriminator: 1},
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{Address: 0x4005d1, File: file1H, Line: 7, IsStmt: true},
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{Address: 0x4005e7, File: file1C, Line: 6, IsStmt: true},
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{Address: 0x4005eb, File: file1C, Line: 7, IsStmt: true},
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{Address: 0x4005f5, File: file1C, Line: 8, IsStmt: true},
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{Address: 0x4005ff, File: file1C, Line: 9, IsStmt: true},
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{Address: 0x400601, EndSequence: true},
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{Address: 0x400601, File: file2C, Line: 4, IsStmt: true},
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{Address: 0x400605, File: file2C, Line: 5, IsStmt: true},
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{Address: 0x40060f, File: file2C, Line: 6, IsStmt: true},
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{Address: 0x400611, EndSequence: true},
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}
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testLineTable(t, want, elfData(t, "testdata/line-gcc.elf"))
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}
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func TestLineGCCWindows(t *testing.T) {
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// Generated by:
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// > gcc --version
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// gcc (tdm64-1) 4.9.2
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// > gcc -g -o line-gcc-win.bin line1.c C:\workdir\go\src\debug\dwarf\testdata\line2.c
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toWindows := func(lf *LineFile) *LineFile {
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lf2 := *lf
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lf2.Name = strings.Replace(lf2.Name, "/home/austin/go.dev/", "C:\\workdir\\go\\", -1)
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lf2.Name = strings.Replace(lf2.Name, "/", "\\", -1)
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return &lf2
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}
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file1C := toWindows(file1C)
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file1H := toWindows(file1H)
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file2C := toWindows(file2C)
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// Line table based on objdump --dwarf=rawline,decodedline
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want := []LineEntry{
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{Address: 0x401530, File: file1H, Line: 2, IsStmt: true},
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{Address: 0x401538, File: file1H, Line: 5, IsStmt: true},
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{Address: 0x401541, File: file1H, Line: 6, IsStmt: true, Discriminator: 3},
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{Address: 0x40154b, File: file1H, Line: 5, IsStmt: true, Discriminator: 3},
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{Address: 0x40154f, File: file1H, Line: 5, IsStmt: false, Discriminator: 1},
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{Address: 0x401555, File: file1H, Line: 7, IsStmt: true},
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{Address: 0x40155b, File: file1C, Line: 6, IsStmt: true},
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{Address: 0x401563, File: file1C, Line: 6, IsStmt: true},
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{Address: 0x401568, File: file1C, Line: 7, IsStmt: true},
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{Address: 0x40156d, File: file1C, Line: 8, IsStmt: true},
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{Address: 0x401572, File: file1C, Line: 9, IsStmt: true},
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{Address: 0x401578, EndSequence: true},
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{Address: 0x401580, File: file2C, Line: 4, IsStmt: true},
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{Address: 0x401588, File: file2C, Line: 5, IsStmt: true},
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{Address: 0x401595, File: file2C, Line: 6, IsStmt: true},
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{Address: 0x40159b, EndSequence: true},
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}
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testLineTable(t, want, peData(t, "testdata/line-gcc-win.bin"))
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}
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func TestLineELFClang(t *testing.T) {
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// Generated by:
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// # clang --version | head -n1
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// Ubuntu clang version 3.4-1ubuntu3 (tags/RELEASE_34/final) (based on LLVM 3.4)
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// # clang -g -o line-clang.elf line*.
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want := []LineEntry{
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{Address: 0x400530, File: file1C, Line: 6, IsStmt: true},
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{Address: 0x400534, File: file1C, Line: 7, IsStmt: true, PrologueEnd: true},
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{Address: 0x400539, File: file1C, Line: 8, IsStmt: true},
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{Address: 0x400545, File: file1C, Line: 9, IsStmt: true},
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{Address: 0x400550, File: file1H, Line: 2, IsStmt: true},
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{Address: 0x400554, File: file1H, Line: 5, IsStmt: true, PrologueEnd: true},
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{Address: 0x400568, File: file1H, Line: 6, IsStmt: true},
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{Address: 0x400571, File: file1H, Line: 5, IsStmt: true},
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{Address: 0x400581, File: file1H, Line: 7, IsStmt: true},
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{Address: 0x400583, EndSequence: true},
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{Address: 0x400590, File: file2C, Line: 4, IsStmt: true},
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{Address: 0x4005a0, File: file2C, Line: 5, IsStmt: true, PrologueEnd: true},
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{Address: 0x4005a7, File: file2C, Line: 6, IsStmt: true},
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{Address: 0x4005b0, EndSequence: true},
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}
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testLineTable(t, want, elfData(t, "testdata/line-clang.elf"))
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}
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func TestLineSeek(t *testing.T) {
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d := elfData(t, "testdata/line-gcc.elf")
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// Get the line table for the first CU.
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cu, err := d.Reader().Next()
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if err != nil {
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t.Fatal("d.Reader().Next:", err)
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}
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lr, err := d.LineReader(cu)
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if err != nil {
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t.Fatal("d.LineReader:", err)
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}
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// Read entries forward.
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var line LineEntry
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var posTable []LineReaderPos
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var table []LineEntry
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for {
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posTable = append(posTable, lr.Tell())
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err := lr.Next(&line)
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if err != nil {
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if err == io.EOF {
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break
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}
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t.Fatal("lr.Next:", err)
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}
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table = append(table, line)
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}
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// Test that Reset returns to the first line.
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lr.Reset()
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if err := lr.Next(&line); err != nil {
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t.Fatal("lr.Next after Reset failed:", err)
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} else if line != table[0] {
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t.Fatal("lr.Next after Reset returned", line, "instead of", table[0])
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}
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// Check that entries match when seeking backward.
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for i := len(posTable) - 1; i >= 0; i-- {
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lr.Seek(posTable[i])
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err := lr.Next(&line)
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if i == len(posTable)-1 {
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if err != io.EOF {
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t.Fatal("expected io.EOF after seek to end, got", err)
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}
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} else if err != nil {
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t.Fatal("lr.Next after seek to", posTable[i], "failed:", err)
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} else if line != table[i] {
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t.Fatal("lr.Next after seek to", posTable[i], "returned", line, "instead of", table[i])
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}
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}
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// Check that seeking to a PC returns the right line.
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if err := lr.SeekPC(table[0].Address-1, &line); err != ErrUnknownPC {
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t.Fatalf("lr.SeekPC to %#x returned %v instead of ErrUnknownPC", table[0].Address-1, err)
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}
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for i, testLine := range table {
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if testLine.EndSequence {
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if err := lr.SeekPC(testLine.Address, &line); err != ErrUnknownPC {
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t.Fatalf("lr.SeekPC to %#x returned %v instead of ErrUnknownPC", testLine.Address, err)
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}
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continue
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}
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nextPC := table[i+1].Address
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for pc := testLine.Address; pc < nextPC; pc++ {
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if err := lr.SeekPC(pc, &line); err != nil {
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t.Fatalf("lr.SeekPC to %#x failed: %v", pc, err)
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} else if line != testLine {
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t.Fatalf("lr.SeekPC to %#x returned %v instead of %v", pc, line, testLine)
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}
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}
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}
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}
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func testLineTable(t *testing.T, want []LineEntry, d *Data) {
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// Get line table from d.
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var got []LineEntry
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dr := d.Reader()
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for {
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ent, err := dr.Next()
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if err != nil {
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t.Fatal("dr.Next:", err)
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} else if ent == nil {
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break
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}
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if ent.Tag != TagCompileUnit {
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dr.SkipChildren()
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continue
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}
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// Decode CU's line table.
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lr, err := d.LineReader(ent)
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if err != nil {
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t.Fatal("d.LineReader:", err)
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} else if lr == nil {
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continue
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}
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for {
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var line LineEntry
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err := lr.Next(&line)
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if err != nil {
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if err == io.EOF {
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break
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}
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t.Fatal("lr.Next:", err)
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}
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// Ignore sources from the Windows build environment.
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if strings.HasPrefix(line.File.Name, "C:\\crossdev\\") ||
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strings.HasPrefix(line.File.Name, "C:/crossdev/") {
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continue
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}
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got = append(got, line)
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}
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}
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// Compare line tables.
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if !compareLines(got, want) {
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t.Log("Line tables do not match. Got:")
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dumpLines(t, got)
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t.Log("Want:")
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dumpLines(t, want)
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t.FailNow()
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}
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}
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func compareLines(a, b []LineEntry) bool {
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if len(a) != len(b) {
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return false
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}
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for i := range a {
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al, bl := a[i], b[i]
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// If both are EndSequence, then the only other valid
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// field is Address. Otherwise, test equality of all
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// fields.
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if al.EndSequence && bl.EndSequence && al.Address == bl.Address {
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continue
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}
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if al.File.Name != bl.File.Name {
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return false
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}
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al.File = nil
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bl.File = nil
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if al != bl {
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return false
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}
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}
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return true
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}
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func dumpLines(t *testing.T, lines []LineEntry) {
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for _, l := range lines {
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t.Logf(" %+v File:%+v", l, l.File)
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}
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}
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type joinTest struct {
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dirname, filename string
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path string
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}
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var joinTests = []joinTest{
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{"a", "b", "a/b"},
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{"a", "", "a"},
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{"", "b", "b"},
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{"/a", "b", "/a/b"},
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{"/a/", "b", "/a/b"},
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{`C:\Windows\`, `System32`, `C:\Windows\System32`},
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{`C:\Windows\`, ``, `C:\Windows\`},
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{`C:\`, `Windows`, `C:\Windows`},
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{`C:\Windows\`, `C:System32`, `C:\Windows\System32`},
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{`C:\Windows`, `a/b`, `C:\Windows\a/b`},
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{`\\host\share\`, `foo`, `\\host\share\foo`},
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{`\\host\share\`, `foo\bar`, `\\host\share\foo\bar`},
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{`//host/share/`, `foo/bar`, `//host/share/foo/bar`},
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// The following are "best effort". We shouldn't see relative
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// base directories in DWARF, but these test that pathJoin
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// doesn't fail miserably if it sees one.
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{`C:`, `a`, `C:a`},
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{`C:`, `a\b`, `C:a\b`},
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{`C:.`, `a`, `C:.\a`},
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{`C:a`, `b`, `C:a\b`},
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}
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func TestPathJoin(t *testing.T) {
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for _, test := range joinTests {
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got := PathJoin(test.dirname, test.filename)
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if test.path != got {
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t.Errorf("pathJoin(%q, %q) = %q, want %q", test.dirname, test.filename, got, test.path)
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}
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}
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}
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