GO program - RISCV Environment - Segmentation violation

[Jagan Sivakumar]

HI Team

Trying to run a sample GO program cross compiled to RISCV platform.

Getting segmentation violation issue when performing read and write in large array list.

Kindly let me know how to address the issue

Sample GO Program:

package main

import (  
    "fmt"
    "math/rand"
)
func main() {
 
    fmt.Println("Enter array size: ")
    var arraySize int
    fmt.Scanln(&arraySize)
    list := make([]float64, arraySize)
    for i := 0; i < arraySize; i++ {
        list[i] = rand.Float64()
    }
    for i := 0; i < arraySize; i++ {
        if( i % 100000 == 0){
                fmt.Print("Index[")
                fmt.Print(i)
                fmt.Print("] =")
                fmt.Println(list[i])
        }
    }
}

Compile Command :

GOOS=linux GOARCH=riscv64 go build -o bin/go-array go-array.go

Error:

Regards

Jagan S

[Ian Lance Taylor]

Sorry, but please send plain text as plain text, not as images.  I can't read your images.

Ian 

[Jagan Sivakumar]

HI Ian
Thanks for your quick response. Send the mail in plain text mode.

Trying to run a sample GO program cross compiled to RISCV platform.

Getting segmentation violation issues when performing read and write
in a large array list.

Kindly let me know how to address the issue

Sample GO Program:
package main

import (
"fmt"
"math/rand"
)
func main() {

fmt.Println("Enter array size: ")
var arraySize int
fmt.Scanln(&arraySize)
list := make([]float64, arraySize)
for i := 0; i < arraySize; i++ {
list[i] = rand.Float64()
}
for i := 0; i < arraySize; i++ {
if( i % 100000 == 0){
fmt.Print("Index[")
fmt.Print(i)
fmt.Print("] =")
fmt.Println(list[i])
}
}
}

Compile Command :
GOOS=linux GOARCH=riscv64 go build -o bin/go-array go-array.go

Error:

Getting segmentation violation issue when performing read and write in
large array list.

Logs:
/go-test # env GOGC=50 GODEBUG=gctrace=1 GOTRACEBACK=crash ./go-array-riscv
Enter array size:
10000000
gc 1 @1458.220s 0%: 29+14830+12 ms clock, 29+0/3705/0+12 ms cpu,
76->76->76 MB, 76 MB goal, 0 MB stacks, 0 MB globals, 1 P
GC forced
gc 2 @1593.150s 0%: 27+5800+7.8 ms clock, 27+0/1449/0+7.8 ms cpu,
76->76->76 MB, 114 MB goal, 0 MB stacks, 0 MB globals, 1 P
GC forced
gc 3 @1719.021s 0%: 33+5560+7.3 ms clock, 33+0/1406/0+7.3 ms cpu,
76->76->76 MB, 114 MB goal, 0 MB stacks, 0 MB globals, 1 P
GC forced
fatal error: unexpected signal during runtime execution
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x0]

runtime stack:
runtime.throw({0xbe0e4, 0x2a})
/usr/local/go/src/runtime/panic.go:992 +0x58 fp=0x3fc403ff60
sp=0x3fc403ff38 pc=0x41420
runtime: unexpected return pc for runtime.sigpanic called from 0x1
stack: frame={sp:0x3fc403ff60, fp:0x3fc403ff90}
stack=[0x3fc403e000,0x3fc4040000)
0x0000003fc403fe60: 0x0000000000000000 0x0000000000041698
<runtime.fatalthrow.func1+0x0000000000000050>
0x0000003fc403fe70: 0x0000000000041420
<runtime.throw+0x0000000000000058> 0x0000003fc403ff38
0x0000003fc403fe80: 0x0000000000000000 0x0000003fc4002820
0x0000003fc403fe90: 0x01000000000419d8 0x000000000000000b
0x0000003fc403fea0: 0x000000000000001f 0x0000000000000000
0x0000003fc403feb0: 0x0000000000000000 0x0000000000000001
0x0000003fc403fec0: 0x00000000000bc31e 0x0000000000041630
<runtime.fatalthrow+0x0000000000000048>
0x0000003fc403fed0: 0x0000003fc4002820 0x0000000000041420
<runtime.throw+0x0000000000000058>
0x0000003fc403fee0: 0x0000003fc403ff38 0x0000000000042e40
<runtime.printunlock+0x0000000000000050>
0x0000003fc403fef0: 0x0000003fc403ff38 0x0000000000041420
<runtime.throw+0x0000000000000058>
0x0000003fc403ff00: 0x0000003fc4002820 0x0000000000041420
<runtime.throw+0x0000000000000058>
0x0000003fc403ff10: 0x0000003fc403ff18 0x0000000000041648
<runtime.fatalthrow.func1+0x0000000000000000>
0x0000003fc403ff20: 0x0000003fc4002820 0x0000000000041420
<runtime.throw+0x0000000000000058>
0x0000003fc403ff30: 0x0000003fc403ff38 0x00000000000567e0
<runtime.sigpanic+0x0000000000000230>
0x0000003fc403ff40: 0x0000003fc403ff48 0x0000000000041448
<runtime.throw.func1+0x0000000000000000>
0x0000003fc403ff50: 0x00000000000be0e4 0x000000000000002a
0x0000003fc403ff60: <0x0000000000000001 0x00000000000be0e4
0x0000003fc403ff70: 0x000000000000002a 0x0000003fc942ec60
0x0000003fc403ff80: 0x000000000015a518 0x0000000000028824
<runtime.gcResetMarkState+0x000000000000006c>
0x0000003fc403ff90: >0x0000000000000001 0x0000000000025a5c
<runtime.gcStart.func1+0x000000000000001c>
0x0000003fc403ffa0: 0x00000000001801c8 0x0000003fc91f4400
0x0000003fc403ffb0: 0x0000000600000001 0x0000000000000004
0x0000003fc403ffc0: 0x0000000000000000 0x00000000001801c0
0x0000003fc403ffd0: 0x000000000006a818
<runtime.systemstack+0x0000000000000050> 0x000000000006a78c
<runtime.mstart+0x000000000000000c>
0x0000003fc403ffe0: 0x00000000000004d2 0x000000000006a780
<runtime.mstart+0x0000000000000000>
0x0000003fc403fff0: 0xffffffc03bfc2000 0x000000000006dd58
<runtime.clone+0x0000000000000078>
runtime.sigpanic()
/usr/local/go/src/runtime/signal_unix.go:802 +0x230 fp=0x3fc403ff90
sp=0x3fc403ff60 pc=0x567e0

goroutine 2 [running]:
runtime.systemstack_switch()
/usr/local/go/src/runtime/asm_riscv64.s:96 +0x8 fp=0x3fc402af38
sp=0x3fc402af30 pc=0x6a7b0
runtime.gcStart({0x1, 0x29b5fbb7404, 0x0})
/usr/local/go/src/runtime/mgc.go:663 +0x500 fp=0x3fc402afb0
sp=0x3fc402af38 pc=0x25f78
runtime.forcegchelper()
/usr/local/go/src/runtime/proc.go:307 +0x64 fp=0x3fc402afd8
sp=0x3fc402afb0 pc=0x43e44
runtime.goexit()
/usr/local/go/src/runtime/asm_riscv64.s:497 +0x4 fp=0x3fc402afd8
sp=0x3fc402afd8 pc=0x6c5dc
created by runtime.init.5
/usr/local/go/src/runtime/proc.go:289 +0x28

goroutine 1 [runnable]:
math/rand.Float64()
/usr/local/go/src/math/rand/rand.go:341 +0xc fp=0x3fc4056ea8
sp=0x3fc4056ea8 pc=0x9df84
main.main()
/go-test/go-array.go:14 +0x138 fp=0x3fc4056f80 sp=0x3fc4056ea8 pc=0x9e708
runtime.main()
/usr/local/go/src/runtime/proc.go:250 +0x228 fp=0x3fc4056fd8
sp=0x3fc4056f80 pc=0x43bc8
runtime.goexit()
/usr/local/go/src/runtime/asm_riscv64.s:497 +0x4 fp=0x3fc4056fd8
sp=0x3fc4056fd8 pc=0x6c5dc

goroutine 3 [GC sweep wait]:
runtime.gopark(0xbfbf0, 0x159d80, 0xc, 0x14, 0x1)
/usr/local/go/src/runtime/proc.go:361 +0xfc fp=0x3fc402b7a0
sp=0x3fc402b788 pc=0x4401c
runtime.goparkunlock(...)
/usr/local/go/src/runtime/proc.go:367
runtime.bgsweep(0x3fc4048000)
/usr/local/go/src/runtime/mgcsweep.go:297 +0x138 fp=0x3fc402b7c8
sp=0x3fc402b7a0 pc=0x30758
runtime.gcenable.func1()
/usr/local/go/src/runtime/mgc.go:177 +0x2c fp=0x3fc402b7d8
sp=0x3fc402b7c8 pc=0x25954
runtime.goexit()
/usr/local/go/src/runtime/asm_riscv64.s:497 +0x4 fp=0x3fc402b7d8
sp=0x3fc402b7d8 pc=0x6c5dc
created by runtime.gcenable
/usr/local/go/src/runtime/mgc.go:177 +0x90

goroutine 4 [GC scavenge wait]:
runtime.gopark(0xbfbf0, 0x159d40, 0xd, 0x14, 0x1)
/usr/local/go/src/runtime/proc.go:361 +0xfc fp=0x3fc402bef8
sp=0x3fc402bee0 pc=0x4401c
runtime.goparkunlock(...)
/usr/local/go/src/runtime/proc.go:367
runtime.bgscavenge(0x3fc4048000)
/usr/local/go/src/runtime/mgcscavenge.go:364 +0x32c fp=0x3fc402bfc8
sp=0x3fc402bef8 pc=0x2e39c
runtime.gcenable.func2()
/usr/local/go/src/runtime/mgc.go:178 +0x2c fp=0x3fc402bfd8
sp=0x3fc402bfc8 pc=0x258f4
runtime.goexit()
/usr/local/go/src/runtime/asm_riscv64.s:497 +0x4 fp=0x3fc402bfd8
sp=0x3fc402bfd8 pc=0x6c5dc
created by runtime.gcenable
/usr/local/go/src/runtime/mgc.go:178 +0xe8

goroutine 5 [finalizer wait, 6 minutes]:
runtime.gopark(0xbfbf0, 0x186788, 0x10, 0x14, 0x1)
/usr/local/go/src/runtime/proc.go:361 +0xfc fp=0x3fc402a738
sp=0x3fc402a720 pc=0x4401c
runtime.goparkunlock(...)
/usr/local/go/src/runtime/proc.go:367
runtime.runfinq()
/usr/local/go/src/runtime/mfinal.go:177 +0xd0 fp=0x3fc402a7d8
sp=0x3fc402a738 pc=0x24960
runtime.goexit()
/usr/local/go/src/runtime/asm_riscv64.s:497 +0x4 fp=0x3fc402a7d8
sp=0x3fc402a7d8 pc=0x6c5dc
created by runtime.createfing
/usr/local/go/src/runtime/mfinal.go:157 +0x60

goroutine 6 [GC worker (idle)]:
runtime.gopark(0xbfad8, 0x3fc4070000, 0x18, 0x14, 0x0)
/usr/local/go/src/runtime/proc.go:361 +0xfc fp=0x3fc402c758
sp=0x3fc402c740 pc=0x4401c
runtime.gcBgMarkWorker()
/usr/local/go/src/runtime/mgc.go:1207 +0x114 fp=0x3fc402c7d8
sp=0x3fc402c758 pc=0x27a54
runtime.goexit()
/usr/local/go/src/runtime/asm_riscv64.s:497 +0x4 fp=0x3fc402c7d8
sp=0x3fc402c7d8 pc=0x6c5dc
created by runtime.gcBgMarkStartWorkers
/usr/local/go/src/runtime/mgc.go:1131 +0x2c
Aborted

>> Error:

>>
>>
>
>
> Sorry, but please send plain text as plain text, not as images. I can't read your images.
>
> Ian

--
Regards
Jagan Sivakumar

[Ian Lance Taylor]

Thanks. I don't know why this would happen. If this happens
repeatedly then please open a bug report with all the details at
https://go.dev/issue/new.

Ian