runtime: TestGdbAutotmpTypes fails on Ubuntu 24.04 / gdb 15.0.50-20240403-0ubuntu1

[ulikunitz]

Go version

go version go1.22.2 linux/amd64

Output of go env in your module/workspace:

GO111MODULE=''
GOARCH='amd64'
GOBIN=''
GOCACHE='/home/kunitz/.cache/go-build'
GOENV='/home/kunitz/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/home/kunitz/work/pkg/mod'
GONOPROXY='github.com/ulikunitz,doppelwuerfel.de/home/kunitz/git'
GONOSUMDB='github.com/ulikunitz,doppelwuerfel.de/home/kunitz/git'
GOOS='linux'
GOPATH='/home/kunitz/work'
GOPRIVATE='github.com/ulikunitz,doppelwuerfel.de/home/kunitz/git'
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/home/kunitz/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/home/kunitz/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.2'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/home/kunitz/go/src/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 -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build922128678=/tmp/go-build -gno-record-gcc-switches'

What did you do?

I run all.bash for go1.22.2 (bootstrap go 1.20.14) and run into two errors. The failing test is part of the runtime test suite.

What did you see happen?

~/go/src/runtime$ go test -run GdbAutotmpTypes
--- FAIL: TestGdbAutotmpTypes (0.27s)
    runtime-gdb_test.go:81: gdb version 15.0
    runtime-gdb_test.go:590: gdb output:
        Loading Go Runtime support.
        Target 'exec' cannot support this command.
        Breakpoint 1 at 0x465676: file /tmp/TestGdbAutotmpTypes3628336771/001/main.go, line 8.
        
        This GDB supports auto-downloading debuginfo from the following URLs:
          <https://debuginfod.ubuntu.com>
        Enable debuginfod for this session? (y or [n]) [answered N; input not from terminal]
        Debuginfod has been disabled.
        To make this setting permanent, add 'set debuginfod enabled off' to .gdbinit.
        [New LWP 943527]
        [New LWP 943528]
        [New LWP 943529]
        [New LWP 943530]
        
        Thread 1 "a.exe" hit Breakpoint 1, main.main () at /tmp/TestGdbAutotmpTypes3628336771/001/main.go:8
        8	func main() {
        9		var iface interface{} = map[string]astruct{}
        All types matching regular expression "astruct":
        
        File runtime:
        	[]main.astruct
        	bucket<string,main.astruct>
        	hash<string,main.astruct>
        	main.astruct
        	typedef hash<string,main.astruct> * map[string]main.astruct;
        	typedef noalg.[8]main.astruct noalg.[8]main.astruct;
        	noalg.map.bucket[string]main.astruct
    runtime-gdb_test.go:607: could not find []main.astruct; in 'info typrs astruct' output
FAIL
exit status 1
FAIL	runtime	0.275s

Info about the system:

##### Test execution environment.
# GOARCH: amd64
# CPU: AMD Ryzen 7 3700X 8-Core Processor             
# GOOS: linux
# OS Version: Linux 6.8.0-31-generic #31-Ubuntu SMP PREEMPT_DYNAMIC Sat Apr 20 00:40:06 UTC 2024 x86_64

What did you expect to see?

No error.

[markuspeloquin]

Sadly, this also breaks older versions like 1.19, which I was using to bootstrap. The workaround is to temporarily remove/rename gdb so it skips the tests.

[gopherbot]

Change https://go.dev/cl/598135 mentions this issue: runtime: fix TestGdbAutotmpTypes on gdb version 15

[mpx]

TestGdbAutotmpTypes also fails on Fedora Linux 40.

$ ~/go1.23.1/bin/go test -run TestGdbAutotmpTypes
--- FAIL: TestGdbAutotmpTypes (0.45s)
    runtime-gdb_test.go:78: gdb version 15.1
    runtime-gdb_test.go:569: gdb output:
        Loading Go Runtime support.
        Target 'exec' cannot support this command.
        Breakpoint 1 at 0x46e6b6: file /tmp/TestGdbAutotmpTypes1367315149/001/main.go, line 8.
        
        This GDB supports auto-downloading debuginfo from the following URLs:
          <https://debuginfod.fedoraproject.org/>
        Enable debuginfod for this session? (y or [n]) [answered N; input not from terminal]
        Debuginfod has been disabled.
        To make this setting permanent, add 'set debuginfod enabled off' to .gdbinit.
        [New LWP 1666286]
        [New LWP 1666287]
        [New LWP 1666289]
        [New LWP 1666288]
        [New LWP 1666290]
        
        Thread 1 "a.exe" hit Breakpoint 1, main.main () at /tmp/TestGdbAutotmpTypes1367315149/001/main.go:8
        8	func main() {
        9		var iface interface{} = map[string]astruct{}
        All types matching regular expression "astruct":
        
        File runtime:
        	[]main.astruct
        	bucket<string,main.astruct>
        	hash<string,main.astruct>
        	main.astruct
        	typedef hash<string,main.astruct> * map[string]main.astruct;
        	typedef noalg.[8]main.astruct noalg.[8]main.astruct;
        	noalg.map.bucket[string]main.astruct
    runtime-gdb_test.go:586: could not find []main.astruct; in 'info typrs astruct' output
FAIL
exit status 1
FAIL	runtime	0.455s

Same failure with both go1.23.1 and go1.22.4.

[ankon]

I was able to build golang 1.23.1 using the additional patch from https://go.dev/cl/598135 on Fedora 40.