[delve/pkg/dwarf] panic: runtime error: slice bounds out of range #3873

amalavet · 2024-12-04T20:41:20Z

For certain applications, Delve is panicking when I attempt to debug. This issue is only present for some of my go projects, some applications I can debug without issue.

What version of Delve are you using (dlv version)?

Delve Debugger
Version: 1.23.1
Build: $Id: 2eba762d75437d380e48fc42213853f13aa2904d $

What version of Go are you using? (go version)?

go version go1.23.3 darwin/arm64

What operating system and processor architecture are you using?

darwin/arm64 (MacOS)

What did you do?

❯ dlv debug cmd/server/main.go

What did you expect to see?

Type 'help' for list of commands.
(dlv)

What did you see instead?

panic: runtime error: slice bounds out of range [74:0]

goroutine 7 [running]:
github.com/go-delve/delve/pkg/dwarf/line.parseIncludeDirs5(0x14003cc3810, 0x1400419d1a0)
        REDACTED/go/1.23.3/pkg/mod/github.com/go-delve/[email protected]/pkg/dwarf/line/line_parser.go:188 +0x460
github.com/go-delve/delve/pkg/dwarf/line.Parse({0x14006b3e630, 0xd}, 0x1400419d1a0, {0x0, 0x0, 0x0}, 0x0, 0x76c000, 0x0, 0x8)
        REDACTED/go/1.23.3/pkg/mod/github.com/go-delve/[email protected]/pkg/dwarf/line/line_parser.go:100 +0x23c
github.com/go-delve/delve/pkg/proc.(*BinaryInfo).loadDebugInfoMaps(0x1400023e000, 0x140016bc000, {0x14003c42000, 0x9b6289, 0x9b6289}, {0x14004768000, 0x6cf93a, 0x6cf93a}, 0x140016943c0, 0x14000242200)
        REDACTED/go/1.23.3/pkg/mod/github.com/go-delve/[email protected]/pkg/proc/bininfo.go:2478 +0x7a8
created by github.com/go-delve/delve/pkg/proc.loadBinaryInfoMacho in goroutine 1
        REDACTED/go/1.23.3/pkg/mod/github.com/go-delve/[email protected]/pkg/proc/bininfo.go:2017 +0x590

Also, here is my go env

GO111MODULE='on'
GOARCH='arm64'
GOBIN=''
GOCACHE='REDACTED/Library/Caches/go-build'
GOENV='REDACTED/Library/Application Support/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='arm64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMODCACHE='REDACTED/go/1.23.3/pkg/mod'
GONOPROXY=''
GONOSUMDB=REDACTED
GOOS='darwin'
GOPATH='REDACTED/go/1.23.3'
GOPRIVATE=''
GOPROXY=REDACTED
GOROOT='REDACTED/.goenv/versions/1.23.3'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='REDACTED/.goenv/versions/1.23.3/pkg/tool/darwin_arm64'
GOVCS=''
GOVERSION='go1.23.3'
GODEBUG=''
GOTELEMETRY='local'
GOTELEMETRYDIR='REDACTED/Library/Application Support/go/telemetry'
GCCGO='gccgo'
GOARM64='v8.0'
AR='ar'
CC='/usr/local/bin/gcc'
CXX='/usr/bin/g++'
CGO_ENABLED='1'
GOMOD='REDACTED/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -arch arm64 -pthread -fmessage-length=0 -ffile-prefix-map=/var/folders/p2/r1fr92ns20dggzgnmv20w1p80000gn/T/go-build3234217224=/tmp/go-build -gno-record-gcc-switches -fno-common'

The text was updated successfully, but these errors were encountered:

amalavet · 2024-12-04T20:44:38Z

I notice here that MacOS darwin/arm64 is not on the supported list. Could this be the issue, and if so, is there a plan to support Apple's M series of processors?

amalavet · 2024-12-04T20:55:00Z

Update, setting CGO_ENABLED=0 seems to provide a fix for projects that don't require it

aarzilli · 2024-12-05T08:00:57Z

Darwin/arm64 is supported. There is probably a bug in our implementation of DWARFv5, it would be very helpful if you could share the binary file that produces this error, even privately. Alternatively can you post the output of dlv debug --log --log-output=debugger ... as well as use go build -gcflags='all=-N -l' -o executable ... to compile and then run otool -l executable.

amalavet · 2024-12-06T16:01:15Z

Will send logs shortly

amalavet · 2024-12-17T02:24:03Z

Unfortunately, because the issue is occurring when debugging internal software at my company, I cannot provide anything beyond what I have already shared.

aarzilli · 2024-12-17T07:41:29Z

Not even the names of the sections returned by otool -l? I'd have to close this as not-reproducible.

amalavet · 2025-01-06T16:45:23Z

Let me check

amalavet · 2025-01-06T16:48:47Z

executablecmd/server/main.go:
Load command 0
      cmd LC_SEGMENT_64
  cmdsize 72
  segname __PAGEZERO
   vmaddr 0x0000000000000000
   vmsize 0x0000000100000000
  fileoff 0
 filesize 0
  maxprot 0x00000000
 initprot 0x00000000
   nsects 0
    flags 0x0
Load command 1
      cmd LC_SEGMENT_64
  cmdsize 552
  segname __TEXT
   vmaddr 0x0000000100000000
   vmsize 0x0000000001e84000
  fileoff 0
 filesize 31997952
  maxprot 0x00000005
 initprot 0x00000005
   nsects 6
    flags 0x0
Section
  sectname __text
   segname __TEXT
      addr 0x00000001000047a0
      size 0x0000000001879560
    offset 18336
     align 2^5 (32)
    reloff 0
    nreloc 0
     flags 0x80000400
 reserved1 0
 reserved2 0
Section
  sectname __stubs
   segname __TEXT
      addr 0x000000010187dd00
      size 0x0000000000000840
    offset 25681152
     align 2^2 (4)
    reloff 0
    nreloc 0
     flags 0x80000408
 reserved1 0 (index into indirect symbol table)
 reserved2 12 (size of stubs)
Section
  sectname __rodata
   segname __TEXT
      addr 0x000000010187e540
      size 0x0000000000601d35
    offset 25683264
     align 2^5 (32)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __cstring
   segname __TEXT
      addr 0x0000000101e80278
      size 0x0000000000000405
    offset 31982200
     align 2^3 (8)
    reloff 0
    nreloc 0
     flags 0x00000002
 reserved1 0
 reserved2 0
Section
  sectname __const
   segname __TEXT
      addr 0x0000000101e80680
      size 0x00000000000002f8
    offset 31983232
     align 2^4 (16)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __eh_frame
   segname __TEXT
      addr 0x0000000101e80978
      size 0x0000000000003678
    offset 31983992
     align 2^3 (8)
    reloff 0
    nreloc 0
     flags 0x6800000b
 reserved1 0
 reserved2 0
Load command 2
      cmd LC_SEGMENT_64
  cmdsize 632
  segname __DATA_CONST
   vmaddr 0x0000000101e84000
   vmsize 0x0000000001048000
  fileoff 31997952
 filesize 17072128
  maxprot 0x00000003
 initprot 0x00000003
   nsects 7
    flags 0x10
Section
  sectname __got
   segname __DATA_CONST
      addr 0x0000000101e84000
      size 0x00000000000005a0
    offset 31997952
     align 2^3 (8)
    reloff 0
    nreloc 0
     flags 0x00000006
 reserved1 176 (index into indirect symbol table)
 reserved2 0
Section
  sectname __const
   segname __DATA_CONST
      addr 0x0000000101e845a0
      size 0x0000000000000010
    offset 31999392
     align 2^3 (8)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __cfstring
   segname __DATA_CONST
      addr 0x0000000101e845b0
      size 0x0000000000000040
    offset 31999408
     align 2^3 (8)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __rodata
   segname __DATA_CONST
      addr 0x0000000101e84600
      size 0x000000000052f580
    offset 31999488
     align 2^5 (32)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __typelink
   segname __DATA_CONST
      addr 0x00000001023b3b80
      size 0x000000000000ec3c
    offset 37436288
     align 2^5 (32)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __itablink
   segname __DATA_CONST
      addr 0x00000001023c27c0
      size 0x00000000000059d0
    offset 37496768
     align 2^5 (32)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __gopclntab
   segname __DATA_CONST
      addr 0x00000001023c81a0
      size 0x0000000000b010a8
    offset 37519776
     align 2^5 (32)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Load command 3
      cmd LC_SEGMENT_64
  cmdsize 552
  segname __DATA
   vmaddr 0x0000000102ecc000
   vmsize 0x00000000001f8000
  fileoff 49070080
 filesize 1703936
  maxprot 0x00000003
 initprot 0x00000003
   nsects 6
    flags 0x0
Section
  sectname __data
   segname __DATA
      addr 0x0000000102ecc000
      size 0x000000000003b360
    offset 49070080
     align 2^5 (32)
    reloff 0
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     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __go_buildinfo
   segname __DATA
      addr 0x0000000102f07360
      size 0x00000000000040c0
    offset 49312608
     align 2^4 (16)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __noptrdata
   segname __DATA
      addr 0x0000000102f0b420
      size 0x000000000015fc49
    offset 49329184
     align 2^5 (32)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __bss
   segname __DATA
      addr 0x000000010306b080
      size 0x000000000003fbbc
    offset 0
     align 2^5 (32)
    reloff 0
    nreloc 0
     flags 0x00000001
 reserved1 0
 reserved2 0
Section
  sectname __noptrbss
   segname __DATA
      addr 0x00000001030aac40
      size 0x0000000000019100
    offset 0
     align 2^5 (32)
    reloff 0
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     flags 0x00000001
 reserved1 0
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Section
  sectname __common
   segname __DATA
      addr 0x00000001030c3d40
      size 0x0000000000000060
    offset 0
     align 2^3 (8)
    reloff 0
    nreloc 0
     flags 0x00000001
 reserved1 0
 reserved2 0
Load command 4
      cmd LC_SEGMENT_64
  cmdsize 72
  segname __LINKEDIT
   vmaddr 0x00000001030c4000
   vmsize 0x00000000005a8982
  fileoff 58441728
 filesize 5933442
  maxprot 0x00000001
 initprot 0x00000001
   nsects 0
    flags 0x0
Load command 5
      cmd LC_DYLD_CHAINED_FIXUPS
  cmdsize 16
  dataoff 58441728
 datasize 4024
Load command 6
      cmd LC_DYLD_EXPORTS_TRIE
  cmdsize 16
  dataoff 58445752
 datasize 3280
Load command 7
     cmd LC_SYMTAB
 cmdsize 24
  symoff 58546560
   nsyms 70302
  stroff 59672816
 strsize 4203200
Load command 8
            cmd LC_DYSYMTAB
        cmdsize 80
      ilocalsym 0
      nlocalsym 69990
     iextdefsym 69990
     nextdefsym 131
      iundefsym 70121
      nundefsym 181
         tocoff 0
           ntoc 0
      modtaboff 0
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   extrefsymoff 0
    nextrefsyms 0
 indirectsymoff 59671392
  nindirectsyms 356
      extreloff 0
        nextrel 0
      locreloff 0
        nlocrel 0
Load command 9
          cmd LC_LOAD_DYLINKER
      cmdsize 32
         name /usr/lib/dyld (offset 12)
Load command 10
     cmd LC_UUID
 cmdsize 24
    uuid DBB859D1-3AC5-3987-C72A-0927B6872F4D
Load command 11
      cmd LC_BUILD_VERSION
  cmdsize 32
 platform 1
    minos 15.0
      sdk n/a
   ntools 1
     tool 3
  version 1115.7.3
Load command 12
      cmd LC_SOURCE_VERSION
  cmdsize 16
  version 0.0
Load command 13
       cmd LC_MAIN
   cmdsize 24
  entryoff 545904
 stacksize 0
Load command 14
          cmd LC_LOAD_DYLIB
      cmdsize 56
         name /usr/lib/libresolv.9.dylib (offset 24)
   time stamp 2 Wed Dec 31 18:00:02 1969
      current version 1.0.0
compatibility version 1.0.0
Load command 15
          cmd LC_LOAD_DYLIB
      cmdsize 104
         name /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (offset 24)
   time stamp 2 Wed Dec 31 18:00:02 1969
      current version 3208.0.0
compatibility version 150.0.0
Load command 16
          cmd LC_LOAD_DYLIB
      cmdsize 96
         name /System/Library/Frameworks/Security.framework/Versions/A/Security (offset 24)
   time stamp 2 Wed Dec 31 18:00:02 1969
      current version 61439.60.117
compatibility version 1.0.0
Load command 17
          cmd LC_LOAD_DYLIB
      cmdsize 88
         name /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit (offset 24)
   time stamp 2 Wed Dec 31 18:00:02 1969
      current version 275.0.0
compatibility version 1.0.0
Load command 18
          cmd LC_LOAD_DYLIB
      cmdsize 56
         name /usr/lib/libSystem.B.dylib (offset 24)
   time stamp 2 Wed Dec 31 18:00:02 1969
      current version 1351.0.0
compatibility version 1.0.0
Load command 19
          cmd LC_RPATH
      cmdsize 32
         path @loader_path (offset 12)
Load command 20
          cmd LC_RPATH
      cmdsize 96
         path /opt/homebrew/Cellar/gcc/14.2.0_1/lib/gcc/current/gcc/aarch64-apple-darwin24/14 (offset 12)
Load command 21
          cmd LC_RPATH
      cmdsize 72
         path /opt/homebrew/Cellar/gcc/14.2.0_1/lib/gcc/current/gcc (offset 12)
Load command 22
          cmd LC_RPATH
      cmdsize 64
         path /opt/homebrew/Cellar/gcc/14.2.0_1/lib/gcc/current (offset 12)
Load command 23
      cmd LC_FUNCTION_STARTS
  cmdsize 16
  dataoff 58449032
 datasize 97528
Load command 24
      cmd LC_DATA_IN_CODE
  cmdsize 16
  dataoff 58546560
 datasize 0
Load command 25
      cmd LC_CODE_SIGNATURE
  cmdsize 16
  dataoff 63876016
 datasize 499154
Load command 26
      cmd LC_SEGMENT_64
  cmdsize 1032
  segname __DWARF
   vmaddr 0x0000000000000000
   vmsize 0x0000000000000000
  fileoff 50774016
 filesize 7665958
  maxprot 0x00000007
 initprot 0x00000000
   nsects 12
    flags 0x0
Section
  sectname __zdebug_line
   segname __DWARF
      addr 0x00000001035d8000
      size 0x0000000000112cd0
    offset 50774016
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __zdebug_loc
   segname __DWARF
      addr 0x00000001036eacd0
      size 0x00000000000d0f6c
    offset 51899600
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __zdebug_ranges
   segname __DWARF
      addr 0x00000001037bbc3c
      size 0x0000000000028219
    offset 52755516
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __zdebug_aranges
   segname __DWARF
      addr 0x00000001037e3e55
      size 0x0000000000002852
    offset 52919893
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __zdebug_info
   segname __DWARF
      addr 0x00000001037e66a7
      size 0x0000000000290026
    offset 52930215
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __zdebug_frame
   segname __DWARF
      addr 0x0000000103a766cd
      size 0x000000000008d53d
    offset 55617229
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __zdebug_abbrev
   segname __DWARF
      addr 0x0000000103b03c0a
      size 0x0000000000000314
    offset 56196106
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __zdebug_str
   segname __DWARF
      addr 0x0000000103b03f1e
      size 0x000000000009cbdd
    offset 56196894
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __zapple_names
   segname __DWARF
      addr 0x0000000103ba0afb
      size 0x00000000001078fa
    offset 56838907
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __apple_namespac
   segname __DWARF
      addr 0x0000000103ca83f5
      size 0x0000000000000024
    offset 57918453
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __zapple_types
   segname __DWARF
      addr 0x0000000103ca8419
      size 0x000000000007f4e9
    offset 57918489
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0
Section
  sectname __apple_objc
   segname __DWARF
      addr 0x0000000103d27902
      size 0x0000000000000024
    offset 58439938
     align 2^0 (1)
    reloff 0
    nreloc 0
     flags 0x00000000
 reserved1 0
 reserved2 0

aarzilli · 2025-01-06T20:01:50Z

It looks like the __zdebug_line_str has been stripped off by something, I wonder what, there might be other bugs with long section names and mach-o somewhere. Hard to know what's at fault without being able to reproduce it. Not delve's fault, however. Maybe go's linker, maybe LLVM.

aarzilli added kind/needs more info kind/bug os/macOS area/proc labels Dec 5, 2024

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[delve/pkg/dwarf] panic: runtime error: slice bounds out of range #3873

[delve/pkg/dwarf] panic: runtime error: slice bounds out of range #3873

amalavet commented Dec 4, 2024 •

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aarzilli commented Jan 6, 2025

[delve/pkg/dwarf] panic: runtime error: slice bounds out of range #3873

[delve/pkg/dwarf] panic: runtime error: slice bounds out of range #3873

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