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Source file src/debug/macho/file_test.go

Documentation: debug/macho

     1  // Copyright 2009 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package macho
     6  
     7  import (
     8  	"reflect"
     9  	"testing"
    10  )
    11  
    12  type fileTest struct {
    13  	file        string
    14  	hdr         FileHeader
    15  	loads       []interface{}
    16  	sections    []*SectionHeader
    17  	relocations map[string][]Reloc
    18  }
    19  
    20  var fileTests = []fileTest{
    21  	{
    22  		"testdata/gcc-386-darwin-exec",
    23  		FileHeader{0xfeedface, Cpu386, 0x3, 0x2, 0xc, 0x3c0, 0x85},
    24  		[]interface{}{
    25  			&SegmentHeader{LoadCmdSegment, 0x38, "__PAGEZERO", 0x0, 0x1000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
    26  			&SegmentHeader{LoadCmdSegment, 0xc0, "__TEXT", 0x1000, 0x1000, 0x0, 0x1000, 0x7, 0x5, 0x2, 0x0},
    27  			&SegmentHeader{LoadCmdSegment, 0xc0, "__DATA", 0x2000, 0x1000, 0x1000, 0x1000, 0x7, 0x3, 0x2, 0x0},
    28  			&SegmentHeader{LoadCmdSegment, 0x7c, "__IMPORT", 0x3000, 0x1000, 0x2000, 0x1000, 0x7, 0x7, 0x1, 0x0},
    29  			&SegmentHeader{LoadCmdSegment, 0x38, "__LINKEDIT", 0x4000, 0x1000, 0x3000, 0x12c, 0x7, 0x1, 0x0, 0x0},
    30  			nil, // LC_SYMTAB
    31  			nil, // LC_DYSYMTAB
    32  			nil, // LC_LOAD_DYLINKER
    33  			nil, // LC_UUID
    34  			nil, // LC_UNIXTHREAD
    35  			&Dylib{nil, "/usr/lib/libgcc_s.1.dylib", 0x2, 0x10000, 0x10000},
    36  			&Dylib{nil, "/usr/lib/libSystem.B.dylib", 0x2, 0x6f0104, 0x10000},
    37  		},
    38  		[]*SectionHeader{
    39  			{"__text", "__TEXT", 0x1f68, 0x88, 0xf68, 0x2, 0x0, 0x0, 0x80000400},
    40  			{"__cstring", "__TEXT", 0x1ff0, 0xd, 0xff0, 0x0, 0x0, 0x0, 0x2},
    41  			{"__data", "__DATA", 0x2000, 0x14, 0x1000, 0x2, 0x0, 0x0, 0x0},
    42  			{"__dyld", "__DATA", 0x2014, 0x1c, 0x1014, 0x2, 0x0, 0x0, 0x0},
    43  			{"__jump_table", "__IMPORT", 0x3000, 0xa, 0x2000, 0x6, 0x0, 0x0, 0x4000008},
    44  		},
    45  		nil,
    46  	},
    47  	{
    48  		"testdata/gcc-amd64-darwin-exec",
    49  		FileHeader{0xfeedfacf, CpuAmd64, 0x80000003, 0x2, 0xb, 0x568, 0x85},
    50  		[]interface{}{
    51  			&SegmentHeader{LoadCmdSegment64, 0x48, "__PAGEZERO", 0x0, 0x100000000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
    52  			&SegmentHeader{LoadCmdSegment64, 0x1d8, "__TEXT", 0x100000000, 0x1000, 0x0, 0x1000, 0x7, 0x5, 0x5, 0x0},
    53  			&SegmentHeader{LoadCmdSegment64, 0x138, "__DATA", 0x100001000, 0x1000, 0x1000, 0x1000, 0x7, 0x3, 0x3, 0x0},
    54  			&SegmentHeader{LoadCmdSegment64, 0x48, "__LINKEDIT", 0x100002000, 0x1000, 0x2000, 0x140, 0x7, 0x1, 0x0, 0x0},
    55  			nil, // LC_SYMTAB
    56  			nil, // LC_DYSYMTAB
    57  			nil, // LC_LOAD_DYLINKER
    58  			nil, // LC_UUID
    59  			nil, // LC_UNIXTHREAD
    60  			&Dylib{nil, "/usr/lib/libgcc_s.1.dylib", 0x2, 0x10000, 0x10000},
    61  			&Dylib{nil, "/usr/lib/libSystem.B.dylib", 0x2, 0x6f0104, 0x10000},
    62  		},
    63  		[]*SectionHeader{
    64  			{"__text", "__TEXT", 0x100000f14, 0x6d, 0xf14, 0x2, 0x0, 0x0, 0x80000400},
    65  			{"__symbol_stub1", "__TEXT", 0x100000f81, 0xc, 0xf81, 0x0, 0x0, 0x0, 0x80000408},
    66  			{"__stub_helper", "__TEXT", 0x100000f90, 0x18, 0xf90, 0x2, 0x0, 0x0, 0x0},
    67  			{"__cstring", "__TEXT", 0x100000fa8, 0xd, 0xfa8, 0x0, 0x0, 0x0, 0x2},
    68  			{"__eh_frame", "__TEXT", 0x100000fb8, 0x48, 0xfb8, 0x3, 0x0, 0x0, 0x6000000b},
    69  			{"__data", "__DATA", 0x100001000, 0x1c, 0x1000, 0x3, 0x0, 0x0, 0x0},
    70  			{"__dyld", "__DATA", 0x100001020, 0x38, 0x1020, 0x3, 0x0, 0x0, 0x0},
    71  			{"__la_symbol_ptr", "__DATA", 0x100001058, 0x10, 0x1058, 0x2, 0x0, 0x0, 0x7},
    72  		},
    73  		nil,
    74  	},
    75  	{
    76  		"testdata/gcc-amd64-darwin-exec-debug",
    77  		FileHeader{0xfeedfacf, CpuAmd64, 0x80000003, 0xa, 0x4, 0x5a0, 0},
    78  		[]interface{}{
    79  			nil, // LC_UUID
    80  			&SegmentHeader{LoadCmdSegment64, 0x1d8, "__TEXT", 0x100000000, 0x1000, 0x0, 0x0, 0x7, 0x5, 0x5, 0x0},
    81  			&SegmentHeader{LoadCmdSegment64, 0x138, "__DATA", 0x100001000, 0x1000, 0x0, 0x0, 0x7, 0x3, 0x3, 0x0},
    82  			&SegmentHeader{LoadCmdSegment64, 0x278, "__DWARF", 0x100002000, 0x1000, 0x1000, 0x1bc, 0x7, 0x3, 0x7, 0x0},
    83  		},
    84  		[]*SectionHeader{
    85  			{"__text", "__TEXT", 0x100000f14, 0x0, 0x0, 0x2, 0x0, 0x0, 0x80000400},
    86  			{"__symbol_stub1", "__TEXT", 0x100000f81, 0x0, 0x0, 0x0, 0x0, 0x0, 0x80000408},
    87  			{"__stub_helper", "__TEXT", 0x100000f90, 0x0, 0x0, 0x2, 0x0, 0x0, 0x0},
    88  			{"__cstring", "__TEXT", 0x100000fa8, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2},
    89  			{"__eh_frame", "__TEXT", 0x100000fb8, 0x0, 0x0, 0x3, 0x0, 0x0, 0x6000000b},
    90  			{"__data", "__DATA", 0x100001000, 0x0, 0x0, 0x3, 0x0, 0x0, 0x0},
    91  			{"__dyld", "__DATA", 0x100001020, 0x0, 0x0, 0x3, 0x0, 0x0, 0x0},
    92  			{"__la_symbol_ptr", "__DATA", 0x100001058, 0x0, 0x0, 0x2, 0x0, 0x0, 0x7},
    93  			{"__debug_abbrev", "__DWARF", 0x100002000, 0x36, 0x1000, 0x0, 0x0, 0x0, 0x0},
    94  			{"__debug_aranges", "__DWARF", 0x100002036, 0x30, 0x1036, 0x0, 0x0, 0x0, 0x0},
    95  			{"__debug_frame", "__DWARF", 0x100002066, 0x40, 0x1066, 0x0, 0x0, 0x0, 0x0},
    96  			{"__debug_info", "__DWARF", 0x1000020a6, 0x54, 0x10a6, 0x0, 0x0, 0x0, 0x0},
    97  			{"__debug_line", "__DWARF", 0x1000020fa, 0x47, 0x10fa, 0x0, 0x0, 0x0, 0x0},
    98  			{"__debug_pubnames", "__DWARF", 0x100002141, 0x1b, 0x1141, 0x0, 0x0, 0x0, 0x0},
    99  			{"__debug_str", "__DWARF", 0x10000215c, 0x60, 0x115c, 0x0, 0x0, 0x0, 0x0},
   100  		},
   101  		nil,
   102  	},
   103  	{
   104  		"testdata/clang-386-darwin-exec-with-rpath",
   105  		FileHeader{0xfeedface, Cpu386, 0x3, 0x2, 0x10, 0x42c, 0x1200085},
   106  		[]interface{}{
   107  			nil, // LC_SEGMENT
   108  			nil, // LC_SEGMENT
   109  			nil, // LC_SEGMENT
   110  			nil, // LC_SEGMENT
   111  			nil, // LC_DYLD_INFO_ONLY
   112  			nil, // LC_SYMTAB
   113  			nil, // LC_DYSYMTAB
   114  			nil, // LC_LOAD_DYLINKER
   115  			nil, // LC_UUID
   116  			nil, // LC_VERSION_MIN_MACOSX
   117  			nil, // LC_SOURCE_VERSION
   118  			nil, // LC_MAIN
   119  			nil, // LC_LOAD_DYLIB
   120  			&Rpath{nil, "/my/rpath"},
   121  			nil, // LC_FUNCTION_STARTS
   122  			nil, // LC_DATA_IN_CODE
   123  		},
   124  		nil,
   125  		nil,
   126  	},
   127  	{
   128  		"testdata/clang-amd64-darwin-exec-with-rpath",
   129  		FileHeader{0xfeedfacf, CpuAmd64, 0x80000003, 0x2, 0x10, 0x4c8, 0x200085},
   130  		[]interface{}{
   131  			nil, // LC_SEGMENT
   132  			nil, // LC_SEGMENT
   133  			nil, // LC_SEGMENT
   134  			nil, // LC_SEGMENT
   135  			nil, // LC_DYLD_INFO_ONLY
   136  			nil, // LC_SYMTAB
   137  			nil, // LC_DYSYMTAB
   138  			nil, // LC_LOAD_DYLINKER
   139  			nil, // LC_UUID
   140  			nil, // LC_VERSION_MIN_MACOSX
   141  			nil, // LC_SOURCE_VERSION
   142  			nil, // LC_MAIN
   143  			nil, // LC_LOAD_DYLIB
   144  			&Rpath{nil, "/my/rpath"},
   145  			nil, // LC_FUNCTION_STARTS
   146  			nil, // LC_DATA_IN_CODE
   147  		},
   148  		nil,
   149  		nil,
   150  	},
   151  	{
   152  		"testdata/clang-386-darwin.obj",
   153  		FileHeader{0xfeedface, Cpu386, 0x3, 0x1, 0x4, 0x138, 0x2000},
   154  		nil,
   155  		nil,
   156  		map[string][]Reloc{
   157  			"__text": []Reloc{
   158  				{
   159  					Addr:      0x1d,
   160  					Type:      uint8(GENERIC_RELOC_VANILLA),
   161  					Len:       2,
   162  					Pcrel:     true,
   163  					Extern:    true,
   164  					Value:     1,
   165  					Scattered: false,
   166  				},
   167  				{
   168  					Addr:      0xe,
   169  					Type:      uint8(GENERIC_RELOC_LOCAL_SECTDIFF),
   170  					Len:       2,
   171  					Pcrel:     false,
   172  					Value:     0x2d,
   173  					Scattered: true,
   174  				},
   175  				{
   176  					Addr:      0x0,
   177  					Type:      uint8(GENERIC_RELOC_PAIR),
   178  					Len:       2,
   179  					Pcrel:     false,
   180  					Value:     0xb,
   181  					Scattered: true,
   182  				},
   183  			},
   184  		},
   185  	},
   186  	{
   187  		"testdata/clang-amd64-darwin.obj",
   188  		FileHeader{0xfeedfacf, CpuAmd64, 0x3, 0x1, 0x4, 0x200, 0x2000},
   189  		nil,
   190  		nil,
   191  		map[string][]Reloc{
   192  			"__text": []Reloc{
   193  				{
   194  					Addr:   0x19,
   195  					Type:   uint8(X86_64_RELOC_BRANCH),
   196  					Len:    2,
   197  					Pcrel:  true,
   198  					Extern: true,
   199  					Value:  1,
   200  				},
   201  				{
   202  					Addr:   0xb,
   203  					Type:   uint8(X86_64_RELOC_SIGNED),
   204  					Len:    2,
   205  					Pcrel:  true,
   206  					Extern: false,
   207  					Value:  2,
   208  				},
   209  			},
   210  			"__compact_unwind": []Reloc{
   211  				{
   212  					Addr:   0x0,
   213  					Type:   uint8(X86_64_RELOC_UNSIGNED),
   214  					Len:    3,
   215  					Pcrel:  false,
   216  					Extern: false,
   217  					Value:  1,
   218  				},
   219  			},
   220  		},
   221  	},
   222  }
   223  
   224  func TestOpen(t *testing.T) {
   225  	for i := range fileTests {
   226  		tt := &fileTests[i]
   227  
   228  		f, err := Open(tt.file)
   229  		if err != nil {
   230  			t.Error(err)
   231  			continue
   232  		}
   233  		if !reflect.DeepEqual(f.FileHeader, tt.hdr) {
   234  			t.Errorf("open %s:\n\thave %#v\n\twant %#v\n", tt.file, f.FileHeader, tt.hdr)
   235  			continue
   236  		}
   237  		for i, l := range f.Loads {
   238  			if len(l.Raw()) < 8 {
   239  				t.Errorf("open %s, command %d:\n\tload command %T don't have enough data\n", tt.file, i, l)
   240  			}
   241  		}
   242  		if tt.loads != nil {
   243  			for i, l := range f.Loads {
   244  				if i >= len(tt.loads) {
   245  					break
   246  				}
   247  
   248  				want := tt.loads[i]
   249  				if want == nil {
   250  					continue
   251  				}
   252  
   253  				switch l := l.(type) {
   254  				case *Segment:
   255  					have := &l.SegmentHeader
   256  					if !reflect.DeepEqual(have, want) {
   257  						t.Errorf("open %s, command %d:\n\thave %#v\n\twant %#v\n", tt.file, i, have, want)
   258  					}
   259  				case *Dylib:
   260  					have := l
   261  					have.LoadBytes = nil
   262  					if !reflect.DeepEqual(have, want) {
   263  						t.Errorf("open %s, command %d:\n\thave %#v\n\twant %#v\n", tt.file, i, have, want)
   264  					}
   265  				case *Rpath:
   266  					have := l
   267  					have.LoadBytes = nil
   268  					if !reflect.DeepEqual(have, want) {
   269  						t.Errorf("open %s, command %d:\n\thave %#v\n\twant %#v\n", tt.file, i, have, want)
   270  					}
   271  				default:
   272  					t.Errorf("open %s, command %d: unknown load command\n\thave %#v\n\twant %#v\n", tt.file, i, l, want)
   273  				}
   274  			}
   275  			tn := len(tt.loads)
   276  			fn := len(f.Loads)
   277  			if tn != fn {
   278  				t.Errorf("open %s: len(Loads) = %d, want %d", tt.file, fn, tn)
   279  			}
   280  		}
   281  
   282  		if tt.sections != nil {
   283  			for i, sh := range f.Sections {
   284  				if i >= len(tt.sections) {
   285  					break
   286  				}
   287  				have := &sh.SectionHeader
   288  				want := tt.sections[i]
   289  				if !reflect.DeepEqual(have, want) {
   290  					t.Errorf("open %s, section %d:\n\thave %#v\n\twant %#v\n", tt.file, i, have, want)
   291  				}
   292  			}
   293  			tn := len(tt.sections)
   294  			fn := len(f.Sections)
   295  			if tn != fn {
   296  				t.Errorf("open %s: len(Sections) = %d, want %d", tt.file, fn, tn)
   297  			}
   298  		}
   299  
   300  		if tt.relocations != nil {
   301  			for i, sh := range f.Sections {
   302  				have := sh.Relocs
   303  				want := tt.relocations[sh.Name]
   304  				if !reflect.DeepEqual(have, want) {
   305  					t.Errorf("open %s, relocations in section %d (%s):\n\thave %#v\n\twant %#v\n", tt.file, i, sh.Name, have, want)
   306  				}
   307  			}
   308  		}
   309  	}
   310  }
   311  
   312  func TestOpenFailure(t *testing.T) {
   313  	filename := "file.go"    // not a Mach-O file
   314  	_, err := Open(filename) // don't crash
   315  	if err == nil {
   316  		t.Errorf("open %s: succeeded unexpectedly", filename)
   317  	}
   318  }
   319  
   320  func TestOpenFat(t *testing.T) {
   321  	ff, err := OpenFat("testdata/fat-gcc-386-amd64-darwin-exec")
   322  	if err != nil {
   323  		t.Fatal(err)
   324  	}
   325  
   326  	if ff.Magic != MagicFat {
   327  		t.Errorf("OpenFat: got magic number %#x, want %#x", ff.Magic, MagicFat)
   328  	}
   329  	if len(ff.Arches) != 2 {
   330  		t.Errorf("OpenFat: got %d architectures, want 2", len(ff.Arches))
   331  	}
   332  
   333  	for i := range ff.Arches {
   334  		arch := &ff.Arches[i]
   335  		ftArch := &fileTests[i]
   336  
   337  		if arch.Cpu != ftArch.hdr.Cpu || arch.SubCpu != ftArch.hdr.SubCpu {
   338  			t.Errorf("OpenFat: architecture #%d got cpu=%#x subtype=%#x, expected cpu=%#x, subtype=%#x", i, arch.Cpu, arch.SubCpu, ftArch.hdr.Cpu, ftArch.hdr.SubCpu)
   339  		}
   340  
   341  		if !reflect.DeepEqual(arch.FileHeader, ftArch.hdr) {
   342  			t.Errorf("OpenFat header:\n\tgot %#v\n\twant %#v\n", arch.FileHeader, ftArch.hdr)
   343  		}
   344  	}
   345  }
   346  
   347  func TestOpenFatFailure(t *testing.T) {
   348  	filename := "file.go" // not a Mach-O file
   349  	if _, err := OpenFat(filename); err == nil {
   350  		t.Errorf("OpenFat %s: succeeded unexpectedly", filename)
   351  	}
   352  
   353  	filename = "testdata/gcc-386-darwin-exec" // not a fat Mach-O
   354  	ff, err := OpenFat(filename)
   355  	if err != ErrNotFat {
   356  		t.Errorf("OpenFat %s: got %v, want ErrNotFat", filename, err)
   357  	}
   358  	if ff != nil {
   359  		t.Errorf("OpenFat %s: got %v, want nil", filename, ff)
   360  	}
   361  }
   362  
   363  func TestRelocTypeString(t *testing.T) {
   364  	if X86_64_RELOC_BRANCH.String() != "X86_64_RELOC_BRANCH" {
   365  		t.Errorf("got %v, want %v", X86_64_RELOC_BRANCH.String(), "X86_64_RELOC_BRANCH")
   366  	}
   367  	if X86_64_RELOC_BRANCH.GoString() != "macho.X86_64_RELOC_BRANCH" {
   368  		t.Errorf("got %v, want %v", X86_64_RELOC_BRANCH.GoString(), "macho.X86_64_RELOC_BRANCH")
   369  	}
   370  }
   371  
   372  func TestTypeString(t *testing.T) {
   373  	if TypeExec.String() != "Exec" {
   374  		t.Errorf("got %v, want %v", TypeExec.String(), "Exec")
   375  	}
   376  	if TypeExec.GoString() != "macho.Exec" {
   377  		t.Errorf("got %v, want %v", TypeExec.GoString(), "macho.Exec")
   378  	}
   379  }
   380  

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