cmd/link: Darwin build fails with "unknown load command" #25908

mistydemeo · 2018-06-15T17:31:09Z

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

go version go1.10.3 darwin/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (`go env`)?

GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/vagrant/Library/Caches/go-build"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/vagrant/go"
GORACE=""
GOROOT="/usr/local/Cellar/go/1.10.3/libexec"
GOTMPDIR=""
GOTOOLDIR="/usr/local/Cellar/go/1.10.3/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/4d/rttdp_9d2s7f36zplgwnqrgr0000gn/T/go-build152874796=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

Attempted to build https://github.com/sstephenson/launch_socket_server, a Go program with libc linkage.

What did you expect to see?

Build succeeds.

What did you see instead?

GOPATH=/private/tmp/launch_socket_server-20180614-6825-1xxvz8v/launch_socket_server-1.0.0 go build -o sbin/launch_socket_server src/launch_socket_server.go
# command-line-arguments
/usr/local/Cellar/go/1.10.2/libexec/pkg/tool/darwin_amd64/link: /usr/local/Cellar/go/1.10.2/libexec/pkg/tool/darwin_amd64/link: combining dwarf failed: Unknown load command 0x32 (50)

Notes

This is fixed by #25906.

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

bradfitz · 2018-06-15T17:33:50Z

@ianlancetaylor, okay for Go 1.11?

gopherbot · 2018-06-15T18:12:53Z

Change https://golang.org/cl/119115 mentions this issue: ld/macho: add all missing load commands

mistydemeo · 2018-06-15T19:42:28Z

@gopherbot please consider this for backport to 1.10, it's a regression

gopherbot · 2018-06-15T19:42:35Z

Backport issue(s) opened: #25912 (for 1.10).

Remember to create the cherry-pick CL(s) as soon as the patch is submitted to master, according to https://golang.org/wiki/MinorReleases.

mistydemeo · 2018-06-15T19:42:42Z

@gopherbot please consider this for backport to 1.9, it's a regression

bradfitz · 2018-06-15T19:47:18Z

@mistydemeo, regression from when? When did it last work?

mistydemeo · 2018-06-15T19:49:14Z

@bradfitz It's broken on upcoming Darwin releases, but works on current releases.

bradfitz · 2018-06-15T19:54:27Z

Ah, gotcha. Thanks. I'm cool with both backports in that case.

mistydemeo · 2018-06-15T19:55:32Z

Thanks! 👍 Did I do something wrong wrt getting gopherbot to trigger the 1.9 backport?

bradfitz · 2018-06-15T20:13:57Z

/cc @andybons, @FiloSottile for gopherbot cherry-pick question.

@mistydemeo, feel free to file a manual cherry-pick bug like a caveperson in the meantime if you'd like.

FiloSottile · 2018-06-15T20:29:01Z

It's not you :) the bot doesn't notice commands after the first, it's tracked at #25574. (You can ask for 1.10 and 1.9 in a single message though.)

FiloSottile · 2018-06-15T20:33:11Z

Filed #25915 for cherry-pick to 1.9.

mistydemeo · 2018-06-15T21:58:17Z

Thanks for opening that!

I'm running into an issue pushing the change. This one can't be cherry-picked via Gerrit, since the lines in question moved between 1.9 and 1.10. I have a local patch, and I've followed the instructions here through to the final step. However, it's failing with this message:

remote: Processing changes: refs: 1, done
To https://go.googlesource.com/go
 ! [remote rejected]       HEAD -> refs/for/master (change https://go-review.googlesource.com/#/c/go/+/119115 closed)

It's true that that review is closed, but that's the one that this is backporting. Did I do something wrong with my commit message? This is what I have:

From 4002698146b99540f2abc00df91e87826eccd08d Mon Sep 17 00:00:00 2001
From: Misty De Meo <[email protected]>
Date: Fri, 15 Jun 2018 11:25:57 -0700
Subject: [PATCH] [release-branch.go1.9] ld/macho: add all missing load
 commands

The ld/macho code currently understands a subset of the mach-o load
commands. I've encountered one of these in the wild in a Go-produced
binary, which tripped up the Go linker because its switch statement
expects its list of load commands to be exhaustive; the rest I've
added for the sake of completion.

The ruby-macho library is a good non-Darwin header resource for these:
https://github.com/homebrew/ruby-macho

Fixes #25915

Change-Id: Ib54c065d27e87d8726a9870df05a2bae24828b98
GitHub-Last-Rev: 655e3f4
GitHub-Pull-Request: golang/go#25906
Reviewed-on: https://go-review.googlesource.com/119115
Reviewed-by: Ian Lance Taylor <[email protected]>
---
 .../link/internal/ld/macho_combine_dwarf.go   | 73 +++++++++++++------
 1 file changed, 52 insertions(+), 21 deletions(-)

diff --git a/src/cmd/link/internal/ld/macho_combine_dwarf.go b/src/cmd/link/internal/ld/macho_combine_dwarf.go
index 8c6c4a86ac..515f798a9c 100644
--- a/src/cmd/link/internal/ld/macho_combine_dwarf.go
+++ b/src/cmd/link/internal/ld/macho_combine_dwarf.go
@@ -21,26 +21,57 @@ var dwarfaddr, linkaddr int64
 var linkoffset uint32
 
 const (
-	LC_ID_DYLIB             = 0xd
-	LC_LOAD_DYLINKER        = 0xe
-	LC_PREBOUND_DYLIB       = 0x10
-	LC_LOAD_WEAK_DYLIB      = 0x18
-	LC_UUID                 = 0x1b
-	LC_RPATH                = 0x8000001c
-	LC_CODE_SIGNATURE       = 0x1d
-	LC_SEGMENT_SPLIT_INFO   = 0x1e
-	LC_REEXPORT_DYLIB       = 0x8000001f
-	LC_ENCRYPTION_INFO      = 0x21
-	LC_DYLD_INFO            = 0x22
-	LC_DYLD_INFO_ONLY       = 0x80000022
-	LC_VERSION_MIN_MACOSX   = 0x24
-	LC_VERSION_MIN_IPHONEOS = 0x25
-	LC_FUNCTION_STARTS      = 0x26
-	LC_MAIN                 = 0x80000028
-	LC_DATA_IN_CODE         = 0x29
-	LC_SOURCE_VERSION       = 0x2A
-	LC_DYLIB_CODE_SIGN_DRS  = 0x2B
-	LC_ENCRYPTION_INFO_64   = 0x2C
+	LC_SEGMENT                  = 0x1
+	LC_SYMTAB                   = 0x2
+	LC_SYMSEG                   = 0x3
+	LC_THREAD                   = 0x4
+	LC_UNIXTHREAD               = 0x5
+	LC_LOADFVMLIB               = 0x6
+	LC_IDFVMLIB                 = 0x7
+	LC_IDENT                    = 0x8
+	LC_FVMFILE                  = 0x9
+	LC_PREPAGE                  = 0xa
+	LC_DYSYMTAB                 = 0xb
+	LC_LOAD_DYLIB               = 0xc
+	LC_ID_DYLIB                 = 0xd
+	LC_LOAD_DYLINKER            = 0xe
+	LC_ID_DYLINKER              = 0xf
+	LC_PREBOUND_DYLIB           = 0x10
+	LC_ROUTINES                 = 0x11
+	LC_SUB_FRAMEWORK            = 0x12
+	LC_SUB_UMBRELLA             = 0x13
+	LC_SUB_CLIENT               = 0x14
+	LC_SUB_LIBRARY              = 0x15
+	LC_TWOLEVEL_HINTS           = 0x16
+	LC_PREBIND_CKSUM            = 0x17
+	LC_LOAD_WEAK_DYLIB          = 0x18
+	LC_SEGMENT_64               = 0x19
+	LC_ROUTINES_64              = 0x1a
+	LC_UUID                     = 0x1b
+	LC_RPATH                    = 0x8000001c
+	LC_CODE_SIGNATURE           = 0x1d
+	LC_SEGMENT_SPLIT_INFO       = 0x1e
+	LC_REEXPORT_DYLIB           = 0x8000001f
+	LC_LAZY_LOAD_DYLIB          = 0x20
+	LC_ENCRYPTION_INFO          = 0x21
+	LC_DYLD_INFO                = 0x22
+	LC_DYLD_INFO_ONLY           = 0x80000022
+	LC_LOAD_UPWARD_DYLIB        = 0x80000023
+	LC_VERSION_MIN_MACOSX       = 0x24
+	LC_VERSION_MIN_IPHONEOS     = 0x25
+	LC_FUNCTION_STARTS          = 0x26
+	LC_DYLD_ENVIRONMENT         = 0x27
+	LC_MAIN                     = 0x80000028
+	LC_DATA_IN_CODE             = 0x29
+	LC_SOURCE_VERSION           = 0x2A
+	LC_DYLIB_CODE_SIGN_DRS      = 0x2B
+	LC_ENCRYPTION_INFO_64       = 0x2C
+	LC_LINKER_OPTION            = 0x2D
+	LC_LINKER_OPTIMIZATION_HINT = 0x2E
+	LC_VERSION_MIN_TVOS         = 0x2F
+	LC_VERSION_MIN_WATCHOS      = 0x30
+	LC_VERSION_NOTE             = 0x31
+	LC_BUILD_VERSION            = 0x32
 
 	pageAlign = 12 // 4096 = 1 << 12
 )
@@ -242,7 +273,7 @@ func machoCombineDwarf(inexe, dsym, outexe string) error {
 			err = machoUpdateLoadCommand(reader, &linkEditDataCmd{}, "DataOff")
 		case LC_ENCRYPTION_INFO, LC_ENCRYPTION_INFO_64:
 			err = machoUpdateLoadCommand(reader, &encryptionInfoCmd{}, "CryptOff")
-		case macho.LoadCmdDylib, macho.LoadCmdThread, macho.LoadCmdUnixThread, LC_PREBOUND_DYLIB, LC_UUID, LC_VERSION_MIN_MACOSX, LC_VERSION_MIN_IPHONEOS, LC_SOURCE_VERSION, LC_MAIN, LC_LOAD_DYLINKER, LC_LOAD_WEAK_DYLIB, LC_REEXPORT_DYLIB, LC_RPATH, LC_ID_DYLIB:
+		case macho.LoadCmdDylib, macho.LoadCmdThread, macho.LoadCmdUnixThread, LC_PREBOUND_DYLIB, LC_UUID, LC_VERSION_MIN_MACOSX, LC_VERSION_MIN_IPHONEOS, LC_SOURCE_VERSION, LC_MAIN, LC_LOAD_DYLINKER, LC_LOAD_WEAK_DYLIB, LC_REEXPORT_DYLIB, LC_RPATH, LC_ID_DYLIB, LC_SYMSEG, LC_LOADFVMLIB, LC_IDFVMLIB, LC_IDENT, LC_FVMFILE, LC_PREPAGE, LC_ID_DYLINKER, LC_ROUTINES, LC_SUB_FRAMEWORK, LC_SUB_UMBRELLA, LC_SUB_CLIENT, LC_SUB_LIBRARY, LC_TWOLEVEL_HINTS, LC_PREBIND_CKSUM, LC_ROUTINES_64, LC_LAZY_LOAD_DYLIB, LC_LOAD_UPWARD_DYLIB, LC_DYLD_ENVIRONMENT, LC_LINKER_OPTION, LC_LINKER_OPTIMIZATION_HINT, LC_VERSION_MIN_TVOS, LC_VERSION_MIN_WATCHOS, LC_VERSION_NOTE, LC_BUILD_VERSION:
 			// Nothing to update
 		default:
 			err = fmt.Errorf("Unknown load command 0x%x (%s)\n", int(cmd.Cmd), cmd.Cmd)
-- 
2.17.1

FiloSottile · 2018-06-15T22:48:59Z

@mistydemeo It's complaining because you are submitting the change to branch master. The critical step in the instructions is git checkout release-branch.go1.9 before git codereview change, so that the change branch is set to have release-branch.go1.9 as upstream.

mistydemeo · 2018-06-15T22:59:59Z

Thank you! I could have sworn I'd done that, but it seems to have worked the second try.

idiotleon · 2018-08-10T22:58:29Z

What was the solution?
I still met this problem when trying to debug a tutorial level go project.
Here is the log

# _/Users/leon/Documents/Projects/GoLang/TutorialLearningGoForWebDevelopment
/usr/local/go/pkg/tool/darwin_amd64/link: /usr/local/go/pkg/tool/darwin_amd64/link: combining dwarf failed: Unknown load command 0x32 (50)
exit status 2
Process exiting with code: 1

mistydemeo · 2018-08-11T00:39:10Z

@Unc7e The PRs mentioned earlier were the fixes. It's been fixed in the 1.11 and 1.10 branches, but hasn't yet made it into a stable release of Go.

ianlancetaylor · 2018-08-11T00:51:44Z

@mistydemeo 1.10 is a stable release of Go.

This commit implements the initial support for docker-worker payloads. So far, only the Image, Command, Env and MaxRunTime fields are supported. It hasn't been extensive tested so features like task cancellation may not work. Also, it doesn't implement custom artifacts and more extensive tests. The support for docker-worker payloads is achieved through build flags. To build with docker-worker paylod, build it with the "docker" flag, like so: $ go build -tags=docker Notice that generic-worker will not be supported in this build. We also needed to upgrade golang due to a bug in the go compiler [1]. [1] golang/go#25908

cuijianzhi · 2018-12-19T15:35:11Z

it's gone when i upgrade to go1.11.4.

Toplife · 2019-01-31T00:31:32Z

I am also meet this error in 1.10.3, upgrade to 1.11.x is fixed.

gopherbot mentioned this issue Jun 15, 2018

ld/macho: add all missing load commands #25906

Closed

bradfitz changed the title ~~Darwin build fails with "unknown load command"~~ cmd/link: Darwin build fails with "unknown load command" Jun 15, 2018

bradfitz added the NeedsFix The path to resolution is known, but the work has not been done. label Jun 15, 2018

bradfitz assigned ianlancetaylor Jun 15, 2018

bradfitz added this to the Go1.11 milestone Jun 15, 2018

ianlancetaylor added the OS-Darwin label Jun 15, 2018

gopherbot closed this as completed in 1a92cdb Jun 15, 2018

gopherbot mentioned this issue Jun 15, 2018

cmd/link: Darwin build fails with "unknown load command" [1.10 backport] #25912

Closed

FiloSottile mentioned this issue Jun 15, 2018

cmd/link: Darwin build fails with "unknown load command" [1.9 backport] #25915

Closed

adamdecaf mentioned this issue Jun 20, 2018

Install failed on macOS 10.14 and go 1.10.3 cloudflare/cfssl#899

Closed

as-com mentioned this issue Jun 21, 2018

rclone mount has zero blocks available rclone/rclone#2356

Closed

aarzilli mentioned this issue Aug 5, 2018

Unknown load command 0x32 (50) go-delve/delve#1292

Closed

agnivade mentioned this issue Nov 13, 2018

go install github.com/minio/mc command failed #28758

Closed

ianlancetaylor mentioned this issue Jan 3, 2019

cmd/link: vanadium installation Error: combining dwarf failed: Unknown load command 0x32 (50) #29539

Closed

c-smile mentioned this issue Feb 24, 2019

go build error under OSX use demo2.go sciter-sdk/go-sciter#188

Open

afrocheese mentioned this issue Mar 11, 2019

unstable: OS X build is broken lunixbochs/usercorn#318

Closed

rusty-udemy mentioned this issue Apr 12, 2019

Problems trying to build on Mac OSX 10.14 github/gh-ost#727

Open

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can't build ion-cli on macOS 10.14 clearmatics/ion#175

Closed

Kimchelly mentioned this issue Sep 16, 2019

MAKE-900: run tests on MacOS without compiling test binaries mongodb/grip#60

Merged

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cmd/link: Darwin build fails with "unknown load command" #25908

cmd/link: Darwin build fails with "unknown load command" #25908

mistydemeo commented Jun 15, 2018 •

edited

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bradfitz commented Jun 15, 2018

gopherbot commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

gopherbot commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

bradfitz commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

bradfitz commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

bradfitz commented Jun 15, 2018

FiloSottile commented Jun 15, 2018

FiloSottile commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

FiloSottile commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

idiotleon commented Aug 10, 2018

mistydemeo commented Aug 11, 2018

ianlancetaylor commented Aug 11, 2018

cuijianzhi commented Dec 19, 2018

Toplife commented Jan 31, 2019

cmd/link: Darwin build fails with "unknown load command" #25908

cmd/link: Darwin build fails with "unknown load command" #25908

Comments

mistydemeo commented Jun 15, 2018 • edited Loading

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

Does this issue reproduce with the latest release?

What operating system and processor architecture are you using (go env)?

What did you do?

What did you expect to see?

What did you see instead?

Notes

bradfitz commented Jun 15, 2018

gopherbot commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

gopherbot commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

bradfitz commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

bradfitz commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

bradfitz commented Jun 15, 2018

FiloSottile commented Jun 15, 2018

FiloSottile commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

FiloSottile commented Jun 15, 2018

mistydemeo commented Jun 15, 2018

idiotleon commented Aug 10, 2018

mistydemeo commented Aug 11, 2018

ianlancetaylor commented Aug 11, 2018

cuijianzhi commented Dec 19, 2018

Toplife commented Jan 31, 2019

mistydemeo commented Jun 15, 2018 •

edited

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

What operating system and processor architecture are you using (`go env`)?