runtime: bad span state crash #8399
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CL https://golang.org/cl/118050043 mentions this issue. |
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This issue was closed by revision 3590d9c. Status changed to Fixed. |
wheatman
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Jun 25, 2018
Sweepone may be running while a new span is allocating. It must not see the state updated while the sweepgen is unset. Fixes golang#8399 LGTM=dvyukov R=golang-codereviews, dvyukov CC=golang-codereviews https://golang.org/cl/118050043
wheatman
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Jul 9, 2018
Sweepone may be running while a new span is allocating. It must not see the state updated while the sweepgen is unset. Fixes golang#8399 LGTM=dvyukov R=golang-codereviews, dvyukov CC=golang-codereviews https://golang.org/cl/118050043
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go version devel +82cbf874e066 Mon Jul 21 16:29:38 2014 +1000 linux/amd64 $ cd src/pkg/runtime $ go test -c run the following command repeatedly $ GOGC=1 ./runtime.test -test.short -test.cpu=1,4,16 eventually it crashes as: MSpan_Sweep: state=0 sweepgen=7420 mheap.sweepgen=7420 fatal error: MSpan_Sweep: bad span state runtime stack: runtime.throw(0x7c2967) src/pkg/runtime/panic.c:523 +0x77 fp=0xc20818fe08 sp=0xc20818fdf0 runtime.MSpan_Sweep(0x7fb7bca81678) src/pkg/runtime/mgc0.c:1773 +0x789 fp=0xc20818fee0 sp=0xc20818fe08 runtime.sweepone() src/pkg/runtime/mgc0.c:1994 +0x12e fp=0xc20818ff10 sp=0xc20818fee0 MHeap_Reclaim(0x7d9320, 0x7) src/pkg/runtime/mheap.c:158 +0xea fp=0xc20818ff40 sp=0xc20818ff10 mheap_alloc(0x7d9320, 0x7, 0x33) src/pkg/runtime/mheap.c:182 +0x7e fp=0xc20818ff60 sp=0xc20818ff40 mheap_alloc_m(0xc2081e8900) src/pkg/runtime/mheap.c:223 +0xaa fp=0xc20818ff90 sp=0xc20818ff60 runtime.mcall(0x4333e5) src/pkg/runtime/asm_amd64.s:183 +0x52 fp=0xc20818ffa0 sp=0xc20818ff90 goroutine 45154 [running]: runtime.MHeap_Alloc(0x7d9320, 0x7, 0x10000000033) src/pkg/runtime/mheap.c:245 +0x127 fp=0xc2084efc10 sp=0xc2084efbe8 MCentral_Grow(0x7e5910) src/pkg/runtime/mcentral.c:267 +0x89 fp=0xc2084efc70 sp=0xc2084efc10 runtime.MCentral_CacheSpan(0x7e5910) src/pkg/runtime/mcentral.c:84 +0x14b fp=0xc2084efca0 sp=0xc2084efc70 runtime.MCache_Refill(0x7fb7bca89ff0, 0x33) src/pkg/runtime/mcache.c:97 +0x120 fp=0xc2084efcd0 sp=0xc2084efca0 runtime.mallocgc(0x2100, 0x64d301, 0x0) src/pkg/runtime/malloc.goc:152 +0x33f fp=0xc2084efd38 sp=0xc2084efcd0 cnew(0x64d300, 0x108, 0x1) src/pkg/runtime/malloc.goc:836 +0xc1 fp=0xc2084efd58 sp=0xc2084efd38 runtime.cnewarray(0x64d300, 0x108) src/pkg/runtime/malloc.goc:849 +0x3a fp=0xc2084efd78 sp=0xc2084efd58 makeslice1(0x5a6900, 0x108, 0x108, 0xc2084efdd8) src/pkg/runtime/slice.goc:55 +0x4d fp=0xc2084efd90 sp=0xc2084efd78 runtime.makeslice(0x5a6900, 0x108, 0x108, 0x0, 0x108, 0x108) src/pkg/runtime/slice.goc:36 +0xb3 fp=0xc2084efdc0 sp=0xc2084efd90 reflect.Value.MapKeys(0x5ce080, 0xc208534030, 0x0, 0x150, 0x0, 0x0, 0x0) src/pkg/reflect/value.go:1242 +0x137 fp=0xc2084efe80 sp=0xc2084efdc0 runtime_test.func·047() src/pkg/runtime/map_test.go:270 +0xc4 fp=0xc2084effa8 sp=0xc2084efe80 runtime.goexit() src/pkg/runtime/proc.c:1465 fp=0xc2084effb0 sp=0xc2084effa8 created by runtime_test.testConcurrentReadsAfterGrowth src/pkg/runtime/map_test.go:274 +0x26d I suspect it has something to do with the recent stack/malloc change.The text was updated successfully, but these errors were encountered: