Please help, I humbly beg!
First, the environment:
go version go1.16.5 darwin/arm64
ImageMagick 7.0.11-8 Q16 arm 2021-04-17
macOS Big Sur, version 11.4 on Mac Mini M1, 16 GB
I've run into a brick wall with Go driving the Imagemagick 7 API on a 16
GB M1 Mac Mini. The problem occurs when combining an image read and
pixel extraction in a tight loop. The first two lines, which cure the
problem,
were suggested by Justin Israel. Note: it doesn't always crash, but the
attached
PNG fails 100% of the time.
Thanks for looking.
The code looks like this:
package main
import (
"fmt"
"runtime"
"gopkg.in/gographics/imagick.v3/imagick"
)
func main() {
// runtime.LockOSThread()
// defer runtime.UnlockOSThread()
var my_grayscale = "/Path/to/your/8bit/grayscale.jpg"
// use a large size image to stress test, perhaps 1500x1500, any supported
format.
var err error
imagick.Initialize()
defer imagick.Terminate()
for i := 1; i < 5001; i++ {
outline := imagick.NewMagickWand()
err = outline.ReadImage(my_grayscale)
if err != nil {
panic(err)
}
width := outline.GetImageWidth()
height := outline.GetImageHeight()
pix, err := outline.ExportImagePixels(0, 0, width, height, "I",
imagick.PIXEL_CHAR)
if err != nil {
panic(err)
}
pixels, ok := pix.([]byte)
if !ok {
panic("Pixels not extracted")
}
fmt.Printf("%d: %d pixels.\n", i, len(pixels))
outline.Destroy()
}
fmt.Println("Done")
}
The crashlog and backtrace follow.
goroutine 0 [idle]:
runtime: unknown pc 0x185100e68
stack: frame={sp:0x172f4e890, fp:0x0} stack=[0x172ecf338,0x172f4ef38)
0000000172f4e790: 0000000102650400 0000000000000081
0000000172f4e7a0: 0000000172f4e7e0 773280018514fd14
0000000172f4e7b0: 3fd3333333333333 0000000000000000
0000000172f4e7c0: 0000000000000000 000000010265a128
0000000172f4e7d0: 00000001026494a8 0000000172f4e970
0000000172f4e7e0: 0000000172f4e8e0 b23e00018514fc34
0000000172f4e7f0: 0000000132e11420 0000000000000005
0000000172f4e800: 3fd3333333333333 0000000000000000
0000000172f4e810: 3feeddf5de1dde88 0000000000000000
0000000172f4e820: 3ff5f39f935568db 0000000000000000
0000000172f4e830: 3fdb01b18088d6a0 0000000000000000
0000000172f4e840: 0706050403020100 0f0e0d0c0b0a0908
0000000172f4e850: 00000001e404fa08 00000001f045e8b0
0000000172f4e860: 000000018503dde4 0000000000000000
0000000172f4e870: 0000000172f4e8b0 f1520001850407e8
0000000172f4e880: 000000013701c200 0000000000000000
0000000172f4e890: <0000000000000000 000000010265a128
0000000172f4e8a0: 00000001026494a8 0000000172f4e8d8
0000000172f4e8b0: 0000000172f4e8f0 fc6100018507b460
0000000172f4e8c0: 0000000132e11420 ffffffff00000024
0000000172f4e8d0: 0000000000000001 00000001fffff9df
0000000172f4e8e0: 00000001026494a8 0000000172f4e970
0000000172f4e8f0: 0000000172f4e900 713e8001025fc30c
0000000172f4e900: 0000000172f4e930 00000001025faec4
0000000172f4e910: 0000000000000000 0000000000000000
0000000172f4e920: 0000000000000000 0000000172f4e940
0000000172f4e930: 0000000172f4e9b0 00000001025f8f34
0000000172f4e940: 0000000172f4e970 0000000172f4e950
0000000172f4e950: 0000000000000000 0000000000000000
0000000172f4e960: 0000000000000000 0000000000000000
0000000172f4e970: 0000000100000005 0000000132e11bf0
0000000172f4e980: 0000000000000134 0000000d00000004
runtime: unknown pc 0x185100e68
stack: frame={sp:0x172f4e890, fp:0x0} stack=[0x172ecf338,0x172f4ef38)
0000000172f4e790: 0000000102650400 0000000000000081
0000000172f4e7a0: 0000000172f4e7e0 773280018514fd14
0000000172f4e7b0: 3fd3333333333333 0000000000000000
0000000172f4e7c0: 0000000000000000 000000010265a128
0000000172f4e7d0: 00000001026494a8 0000000172f4e970
0000000172f4e7e0: 0000000172f4e8e0 b23e00018514fc34
0000000172f4e7f0: 0000000132e11420 0000000000000005
0000000172f4e800: 3fd3333333333333 0000000000000000
0000000172f4e810: 3feeddf5de1dde88 0000000000000000
0000000172f4e820: 3ff5f39f935568db 0000000000000000
0000000172f4e830: 3fdb01b18088d6a0 0000000000000000
0000000172f4e840: 0706050403020100 0f0e0d0c0b0a0908
0000000172f4e850: 00000001e404fa08 00000001f045e8b0
0000000172f4e860: 000000018503dde4 0000000000000000
0000000172f4e870: 0000000172f4e8b0 f1520001850407e8
0000000172f4e880: 000000013701c200 0000000000000000
0000000172f4e890: <0000000000000000 000000010265a128
0000000172f4e8a0: 00000001026494a8 0000000172f4e8d8
0000000172f4e8b0: 0000000172f4e8f0 fc6100018507b460
0000000172f4e8c0: 0000000132e11420 ffffffff00000024
0000000172f4e8d0: 0000000000000001 00000001fffff9df
0000000172f4e8e0: 00000001026494a8 0000000172f4e970
0000000172f4e8f0: 0000000172f4e900 713e8001025fc30c
0000000172f4e900: 0000000172f4e930 00000001025faec4
0000000172f4e910: 0000000000000000 0000000000000000
0000000172f4e920: 0000000000000000 0000000172f4e940
0000000172f4e930: 0000000172f4e9b0 00000001025f8f34
0000000172f4e940: 0000000172f4e970 0000000172f4e950
0000000172f4e950: 0000000000000000 0000000000000000
0000000172f4e960: 0000000000000000 0000000000000000
0000000172f4e970: 0000000100000005 0000000132e11bf0
0000000172f4e980: 0000000000000134 0000000d00000004
goroutine 1 [syscall]:
runtime.cgocall(0x102371528, 0x14000051d38, 0x14000000100)
/usr/local/go/src/runtime/cgocall.go:154 +0x50 fp=0x14000051d00
sp=0x14000051cc0 pc=0x1022d5ad0
gopkg.in/gographics/imagick.v3/imagick._Cfunc_MagickExportImagePixels(0x137008200,
0x0, 0x0, 0x614, 0x639, 0x132e11020, 0x100000001, 0x140003de000, 0x0)
_cgo_gotypes.go:4595 +0x44 fp=0x14000051d30 sp=0x14000051d00
pc=0x10236bcc4
gopkg.in/gographics/imagick.v3/imagick.(*MagickWand).ExportImagePixels.func2(0x1400009c000,
0x0, 0x0, 0x614, 0x639, 0x132e11020, 0x1, 0x140003de000, 0x14000052000)
/Users/rwschaaf/go/src/gopkg.in/gographics/imagick.v3/imagick/magick_wand_image.go:799
+0xa4 fp=0x14000051d90 sp=0x14000051d30 pc=0x10236dbd4
gopkg.in/gographics/imagick.v3/imagick.(*MagickWand).ExportImagePixels(0x1400009c000,
0x0, 0x0, 0x614, 0x639, 0x10237ae0c, 0x1, 0x1, 0x0, 0x0, ...)
/Users/rwschaaf/go/src/gopkg.in/gographics/imagick.v3/imagick/magick_wand_image.go:799
+0x288 fp=0x14000051e90 sp=0x14000051d90 pc=0x10236ce08
main.main()
/Users/rwschaaf/go/src/github.com/rwschaaf/stresstest/main.go:28
+0x190 fp=0x14000051f70 sp=0x14000051e90 pc=0x10236e3a0
runtime.main()
/usr/local/go/src/runtime/proc.go:225 +0x26c fp=0x14000051fd0
sp=0x14000051f70 pc=0x102304e1c
runtime.goexit()
/usr/local/go/src/runtime/asm_arm64.s:1130 +0x4 fp=0x14000051fd0
sp=0x14000051fd0 pc=0x102332274
r0 0x0
r1 0x0
r2 0x0
r3 0x0
r4 0x132e11420
r5 0x20
r6 0x0
r7 0x140003de000
r8 0xffddb2351033c6dc
r9 0xffddb23462c736dc
r10 0x3ffe
r11 0x1fbf51702
r12 0x1fbf51702
r13 0x1e
r14 0x881
r15 0x8000001f
r16 0x148
r17 0x1f3a8ae90
r18 0x0
r19 0x6
r20 0x172f4f000
r21 0x1b03
r22 0x172f4f0e0
r23 0x0
r24 0x13701c200
r25 0x132e11030
r26 0x140003de000
r27 0x10265a240
r28 0x0
r29 0x172f4e8b0
lr 0x18513343c
sp 0x172f4e890
pc 0x185100e68
fault 0x185100e68
--
You received this message because you are subscribed to the Google Groups
"golang-nuts" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to golang-nuts+unsubscr...@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/golang-nuts/ab7deff4-43c0-4122-944d-6313290a07dcn%40googlegroups.com.
