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
On Mon, Mar 21, 2022 at 7:46 PM Ian Lance Taylor <i...@golang.org> wrote:
>
> On Sun, Mar 20, 2022 at 9:12 AM Jagan Sivakumar <jagansu...@gmail.com> wrote:
>>
>> 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:
>>
>>
>
>
> Sorry, but please send plain text as plain text, not as images. I can't read
> your images.
>
> Ian
--
Regards
Jagan Sivakumar
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