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cmd/link: "pc-relative relocation address too big" for program with huge static data #63202

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peter-xiao opened this issue Sep 25, 2023 · 2 comments
Closed

cmd/link: "pc-relative relocation address too big" for program with huge static data #63202

peter-xiao opened this issue Sep 25, 2023 · 2 comments

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@peter-xiao
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What version of Go are you using (go version)?

$ go version
go1.21

Does this issue reproduce with the latest release?

yes

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

go env Output
$ go env
GO111MODULE='on'
GOARCH='amd64'
GOBIN=''
GOCACHE='/Users/xxx/Library/Caches/go-build'
GOENV='/Users/xxx/Library/Application Support/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='darwin'
GOINSECURE=''
GOMODCACHE='/Users/xxx/gopackage/pkg/mod'
GONOPROXY='*.byted.org,*.everphoto.cn,git.smartisan.com'
GONOSUMDB='*.byted.org,*.everphoto.cn,git.smartisan.com'
GOOS='darwin'
GOPATH='/Users/xxx/gopackage'
GOPRIVATE='*.byted.org,*.everphoto.cn,git.smartisan.com'
GOPROXY='https://goproxy.byted.org|https://goproxy.cn|direct'
GOROOT='/Users/xxx/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/Users/xxx/go/pkg/tool/darwin_amd64'
GOVCS=''
GOVERSION='go1.21.1'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='clang'
CXX='clang++'
CGO_ENABLED='1'
GOMOD='/dev/null'
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 x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -ffile-prefix-map=/var/folders/b1/0fd1b6hs7lz0fm_mh346lybm0000gn/T/go-build3937965288=/tmp/go-build -gno-record-gcc-switches -fno-common'

What did you do?

package main

var x1 = [2000000000 - 10000000]byte{0: 1}

func main() {
	println(x1[0])
	x2 := [100000000]int{1}
	_ = x2
}
go build

What did you expect to see?

Compile successfully && console prints 0

What did you see instead?

Compile failed && console prints

internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa6598603
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa65985f0
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa659850f
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa6598510
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa6598418
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa65983f9
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa65983b0
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa6598390
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa6598387
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa6598373
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa65982f4
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa65982e4
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa65982c9
internal/cpu.processOptions: pc-relative relocation address for internal/cpu.options is too big: 0xa65982c4
internal/cpu.doinit: pc-relative relocation address for internal/cpu.X86 is too big: 0xa67c986a
internal/cpu.doinit: pc-relative relocation address for internal/cpu.X86 is too big: 0xa67c984b
internal/cpu.doinit: pc-relative relocation address for internal/cpu.X86 is too big: 0xa67c9833
internal/cpu.doinit: pc-relative relocation address for internal/cpu.X86 is too big: 0xa67c9818
internal/cpu.doinit: pc-relative relocation address for internal/cpu.X86 is too big: 0xa67c97f6
internal/cpu.doinit: pc-relative relocation address for internal/cpu.X86 is too big: 0xa67c97d0
internal/cpu.doinit: pc-relative relocation address for internal/cpu.options is too big: 0xa659815a
/Users/xxx/go/pkg/tool/darwin_amd64/link: too many errors
@thanm thanm changed the title affected/package: cmd/link cmd/link: "pc-relative relocation address too big" for program with huge static data Sep 25, 2023
@thanm
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thanm commented Sep 25, 2023

Thanks for the report.

Please see these related issues:

#7980
#9862

The crux of the matter here is that the Go toolchain is not set up to support programs that use more than 2GB of static data.

I am going to close this as a duplicate of 7980 for now.

It is possible to imagine adding support for programs that use huge amounts of data (perhaps via something like -mcmodel=medium as describe here), however this work hasn't been done yet, and it would have to be very carefully designed in order to avoid performance problems.

@thanm
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thanm commented Sep 25, 2023

Duplicate of #7980

@thanm thanm marked this as a duplicate of #7980 Sep 25, 2023
@thanm thanm closed this as completed Sep 25, 2023
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2 participants
@thanm @peter-xiao