runtime/pprof: TestStackBarrierProfiling fails occasionally on linux/mips64le

[cherrymui]

The failure is rare, e.g. with commit 44f80f6, it failed 29 times out of 1500 runs. When it fails, it looks like

=== RUN TestStackBarrierProfiling
--- FAIL: TestStackBarrierProfiling (0.65s)
pprof_test.go:393: subprocess failed with signal: segmentation fault:
found next stack barrier at 0xc820137670; expected [*0xc820135c00=0x348d0 *0xc820135c38=0x238f8 *0xc820135cb8=0x24a1c *0xc820135d98=0x6a318 *0xc820135dd8=0xbe274 *0xc820135e28=0xbe2d4 *0xc820135e60=0xbe2d4 *0xc820135e98=0xbe2d4 *0xc820135ed0=0xbe2d4 *0xc820135f08=0xbe2d4 *0xc820135f40=0xbe2d4 *0xc820135f78=0xbe2d4 *0xc820135fb0=0xbe2d4 *0xc820135fe8=0xbe2d4 *0xc820136020=0xbe2d4 *0xc820136058=0xbe2d4 *0xc820136090=0xbe2d4 *0xc8201360c8=0xbe2d4 *0xc820136100=0xbe2d4 *0xc820136138=0xbe2d4 *0xc820136170=0xbe2d4 *0xc8201361a8=0xbe2d4 *0xc8201361e0=0xbe2d4 *0xc820136218=0xbe2d4 *0xc820136250=0xbe2d4 *0xc820136288=0xbe2d4 *0xc8201362c0=0xbe2d4 *0xc8201362f8=0xbe2d4 *0xc820136330=0xbe2d4 *0xc820136368=0xbe2d4 *0xc8201363a0=0xbe2d4 *0xc8201363d8=0xbe2d4 *0xc820136410=0xbe2d4 *0xc820136448=0xbe2d4 *0xc820136480=0xbe2d4 *0xc8201364b8=0xbe2d4 *0xc8201364f0=0xbe2d4 *0xc820136528=0xbe2d4 *0xc820136560=0xbe2d4 *0xc820136598=0xbe2d4 *0xc8201365d0=0xbe2d4 *0xc820136608=0xbe2d4 *0xc820136640=0xbe2d4 *0xc820136678=0xbe2d4 *0xc8201366b0=0xbe2d4 *0xc8201366e8=0xbe2d4 *0xc820136720=0xbe2d4 *0xc820136758=0xbe2d4 *0xc820136790=0xbe2d4 *0xc8201367c8=0xbe2d4 *0xc820136800=0xbe2d4 *0xc820136838=0xbe2d4 *0xc820136870=0xbe2d4 *0xc8201368a8=0xbe2d4 *0xc8201368e0=0xbe2d4 *0xc820136918=0xbe2d4 *0xc820136950=0xbe2d4 *0xc820136988=0xbe2d4 *0xc8201369c0=0xbe2d4 *0xc8201369f8=0xbe2d4 *0xc820136a30=0xbe2d4 *0xc820136a68=0xbe2d4 *0xc820136aa0=0xbe2d4 *0xc820136ad8=0xbe2d4 *0xc820136b10=0xbe2d4 *0xc820136b48=0xbe2d4 *0xc820136b80=0xbe2d4 *0xc820136bb8=0xbe2d4 *0xc820136bf0=0xbe2d4 *0xc820136c28=0xbe2d4 *0xc820136c60=0xbe2d4 *0xc820136c98=0xbe2d4 *0xc820136cd0=0xbe2d4 *0xc820136d08=0xbe2d4 *0xc820136d40=0xbe2d4 *0xc820136d78=0xbe2d4 *0xc820136db0=0xbe2d4 *0xc820136de8=0xbe2d4 *0xc820136e20=0xbe2d4 *0xc820136e58=0xbe2d4 *0xc820136e90=0xbe2d4 *0xc820136ec8=0xbe2d4 *0xc820136f00=0xbe2d4 *0xc820136f38=0xbe2d4 *0xc820136f70=0xbe2d4 *0xc820136fa8=0xbe2d4 *0xc820136fe0=0xbe2d4 *0xc820137018=0xbe2d4 *0xc820137050=0xbe2d4 *0xc820137088=0xbe2d4 *0xc8201370c0=0xbe2d4 *0xc8201370f8=0xbe2d4 *0xc820137130=0xbe2d4 *0xc820137168=0xbe2d4 *0xc8201371a0=0xbe2d4 *0xc8201371d8=0xbe2d4 *0xc820137210=0xbe2d4 *0xc820137248=0xbe2d4 *0xc820137280=0xbe2d4 *0xc8201372b8=0xbe2d4 *0xc8201372f0=0xbe2d4 *0xc820137328=0xbe2d4 *0xc820137360=0xbe2d4 *0xc820137398=0xbe2d4 *0xc8201373d0=0xbe2d4 *0xc820137408=0xbe2d4 *0xc820137440=0xbe2d4 *0xc820137478=0xbe2d4 *0xc8201374b0=0xbe2d4 *0xc8201374e8=0xbe2d4 *0xc820137520=0xbe2d4 *0xc820137558=0xbe2d4 *0xc820137590=0xbe2d4 *0xc8201375c8=0xbe2d4 *0xc820137600=0xbe2d4 @@@ ==> *0xc820137638=0xbe2d4 *0xc820137670=0xbe2d4 *0xc8201376a8=0xbe2d4 *0xc8201376e0=0xbe2d4 *0xc820137718=0xbe2d4 *0xc820137750=0xbe2d4 *0xc820137788=0xbe2d4 *0xc8201377c0=0xbe2d4 *0xc8201377f8=0xbe2d4 *0xc820137830=0xbe2d4 *0xc820137868=0xbe2d4 *0xc8201378a0=0xbe2d4 *0xc8201378d8=0xbe2d4 *0xc820137910=0xbe2d4 *0xc820137948=0xbe2d4 *0xc820137980=0xbe2d4 *0xc8201379b8=0xbe2d4 *0xc8201379f0=0xbe2d4 *0xc820137a28=0xbe2d4 *0xc820137a60=0xbe2d4 *0xc820137a98=0xbe2d4 *0xc820137ad0=0xbe2d4 *0xc820137b08=0xbe2d4 *0xc820137b40=0xbe2d4 *0xc820137b78=0xbe2d4 *0xc820137bb0=0xbe2d4 *0xc820137be8=0xbe2d4 *0xc820137c20=0xbe2d4 *0xc820137c58=0xbe2d4 *0xc820137c90=0xbe2d4 *0xc820137cc8=0xbe2d4 *0xc820137d00=0xbe2d4 *0xc820137d38=0xbe2d4 *0xc820137d70=0xbe2d4 *0xc820137da8=0xbe2d4 *0xc820137de0=0xbe2d4 *0xc820137e18=0xbe2d4 *0xc820137e50=0xbe2d4 *0xc820137e88=0xbe2d4 *0xc820137ec0=0xbe2d4 *0xc820137ef8=0xbe2d4 *0xc820137f30=0xbe2d4 *0xc820137f68=0xbe2d4 *0xc820137fa0=0xbe2d4 *0xc820137fd8=0xbe2d4 *0xc820138010=0xbe2d4 *0xc820138048=0xbe2d4 *0xc820138080=0xbe2d4 *0xc8201380b8=0xbe2d4 *0xc8201380f0=0xbe2d4 *0xc820138128=0xbe2d4 *0xc820138160=0xbe2d4 *0xc820138198=0xbe2d4 *0xc8201381d0=0xbe2d4 *0xc820138208=0xbe2d4 *0xc820138240=0xbe2d4 *0xc820138278=0xbe2d4 *0xc8201382b0=0xbe2d4 *0xc8201382e8=0xbe2d4 *0xc820138320=0xbe2d4 *0xc820138358=0xbe2d4 *0xc820138390=0xbe2d4 *0xc8201383c8=0xbe2d4 *0xc820138400=0xbe2d4 *0xc820138438=0xbe2d4 *0xc820138470=0xbe2d4 *0xc8201384a8=0xbe2d4 *0xc8201384e0=0xbe2d4 *0xc820138518=0xbe2d4 *0xc820138550=0xbe2d4 *0xc820138588=0xbe2d4 *0xc8201385c0=0xbe2d4 *0xc8201385f8=0xbe2d4 *0xc820138630=0xbe2d4 *0xc820138668=0xbe2d4 *0xc8201386a0=0xbe2d4 *0xc8201386d8=0xbe2d4 *0xc820138710=0xbe2d4 *0xc820138748=0xbe2d4 *0xc820138780=0xbe2d4 *0xc8201387b8=0xbe2d4 *0xc8201387f0=0xbe2d4 *0xc820138828=0xbe2d4 *0xc820138860=0xbe2d4 *0xc820138898=0xbe2d4 *0xc8201388d0=0xbe2d4 *0xc820138908=0xbe2d4 *0xc820138940=0xbe2d4 *0xc820138978=0xbe2d4 *0xc8201389b0=0xbe2d4 *0xc8201389e8=0xbe2d4 *0xc820138a20=0xbe2d4 *0xc820138a58=0xbe2d4 *0xc820138a90=0xbe2d4 *0xc820138ac8=0xbe2d4 *0xc820138b00=0xbe2d4 *0xc820138b38=0xbe2d4 *0xc820138b70=0xbe2d4 *0xc820138ba8=0xbe2d4 *0xc820138be0=0xbe2d4 *0xc820138c18=0xbe2d4 *0xc820138c50=0xbe2d4 *0xc820138c88=0xbe2d4 *0xc820138cc0=0xbe2d4 *0xc820138cf8=0xbe2d4 *0xc820138d30=0xbe2d4 *0xc820138d68=0xbe2d4 *0xc820138da0=0xbe2d4 *0xc820138dd8=0xbe2d4 *0xc820138e10=0xbe2d4 *0xc820138e48=0xbe2d4 *0xc820138e80=0xbe2d4 *0xc820138eb8=0xbe2d4 *0xc820138ef0=0xbe2d4 *0xc820138f28=0xbe2d4 *0xc820138f60=0xbe2d4 *0xc820138f98=0xbe2d4 *0xc820138fd0=0xbe2d4 *0xc820139008=0xbe2d4 *0xc820139040=0xbe2d4 *0xc820139078=0xbe2d4 *0xc8201390b0=0xbe2d4 *0xc8201390e8=0xbe2d4 *0xc820139120=0xbe2d4 *0xc820139158=0xbe2d4 *0xc820139190=0xbe2d4 *0xc8201391c8=0xbe2d4 *0xc820139200=0xbe2d4 *0xc820139238=0xbe2d4 *0xc820139270=0xbe2d4 *0xc8201392a8=0xbe2d4 *0xc8201392e0=0xbe2d4 *0xc820139318=0xbe2d4 *0xc820139350=0xbe2d4 *0xc820139388=0xbe2d4 *0xc8201393c0=0xbe2d4 *0xc8201393f8=0xbe2d4 *0xc820139430=0xbe2d4 *0xc820139468=0xbe2d4 *0xc8201394a0=0xbe2d4 *0xc8201394d8=0xbe2d4 *0xc820139510=0xbe2d4 *0xc820139548=0xbe2d4 *0xc820139580=0xbe2d4 *0xc8201395b8=0xbe2d4 *0xc8201395f0=0xbe2d4 *0xc820139628=0xbe2d4 *0xc820139660=0xbe2d4 *0xc820139698=0xbe2d4 *0xc8201396d0=0xbe2d4 *0xc820139708=0xbe2d4 *0xc820139740=0xbe2d4 *0xc820139778=0xbe2d4 *0xc8201397b0=0xbe2d4 *0xc8201397e8=0xbe2d4 *0xc820139820=0xbe2d4 *0xc820139858=0xbe2d4 *0xc820139890=0xbe2d4 *0xc8201398c8=0xbe2d4 *0xc820139900=0xbe2d4 *0xc820139938=0xbe2d4 *0xc820139970=0xbe2d4 *0xc8201399a8=0xbe2d4 *0xc8201399e0=0xbe2d4 *0xc820139a18=0xbe2d4 *0xc820139a50=0xbe2d4 *0xc820139a88=0xbe2d4 *0xc820139ac0=0xbe2d4 *0xc820139af8=0xbe2d4 *0xc820139b30=0xbe2d4 *0xc820139b68=0xbe2d4 *0xc820139ba0=0xbe2d4 *0xc820139bd8=0xbe2d4 *0xc820139c10=0xbe2d4 *0xc820139c48=0xbe2d4 *0xc820139c80=0xbe2d4 *0xc820139cb8=0xbe2d4 *0xc820139cf0=0xbe2d4 *0xc820139d28=0xbe2d4 *0xc820139d60=0xbe2d4 *0xc820139d98=0xbe2d4 *0xc820139dd0=0xbe2d4 *0xc820139e08=0xbe2d4 *0xc820139e40=0xbe2d4 *0xc820139e78=0xbe2d4 *0xc820139eb0=0xbe2d4 *0xc820139ee8=0xbe2d4 *0xc820139f20=0xbe2d4 *0xc820139f58=0xbe2d4 *0xc820139f90=0xbe2d4 *0xc820139fc8=0xbe2d4 *0xc82013a000=0xbe2d4 *0xc82013a038=0xbe2d4 *0xc82013a070=0xbe2d4 *0xc82013a0a8=0xbe2d4 *0xc82013a0e0=0xbe2d4 *0xc82013a118=0xbe2d4 *0xc82013a150=0xbe2d4 *0xc82013a188=0xbe2d4 *0xc82013a1c0=0xbe2d4 *0xc82013a1f8=0xbe2d4 *0xc82013a230=0xbe2d4 *0xc82013a268=0xbe2d4 *0xc82013a2a0=0xbe2d4 *0xc82013a2d8=0xbe2d4 *0xc82013a310=0xbe2d4 *0xc82013a348=0xbe2d4 *0xc82013a380=0xbe2d4 *0xc82013a3b8=0xbe2d4 *0xc82013a3f0=0xbe2d4 *0xc82013a428=0xbe2d4 *0xc82013a460=0xbe2d4 *0xc82013a498=0xbe2d4 *0xc82013a4d0=0xbe2d4 *0xc82013a508=0xbe2d4 *0xc82013a540=0xbe2d4 *0xc82013a578=0xbe2d4 *0xc82013a5b0=0xbe2d4 *0xc82013a5e8=0xbe2d4 *0xc82013a620=0xbe2d4 *0xc82013a658=0xbe2d4 *0xc82013a690=0xbe2d4 *0xc82013a6c8=0xbe2d4 *0xc82013a700=0xbe2d4 *0xc82013a738=0xbe2d4 *0xc82013a770=0xbe2d4 *0xc82013a7a8=0xbe2d4 *0xc82013a7e0=0xbe2d4 *0xc82013a818=0xbe2d4 *0xc82013a850=0xbe2d4 *0xc82013a888=0xbe2d4 *0xc82013a8c0=0xbe2d4 *0xc82013a8f8=0xbe2d4 *0xc82013a930=0xbe2d4 *0xc82013a968=0xbe2d4 *0xc82013a9a0=0xbe2d4 *0xc82013a9d8=0xbe2d4 *0xc82013aa10=0xbe2d4 *0xc82013aa48=0xbe2d4 *0xc82013aa80=0xbe2d4 *0xc82013aab8=0xbe2d4 *0xc82013aaf0=0xbe2d4 *0xc82013ab28=0xbe2d4 *0xc82013ab60=0xbe2d4 *0xc82013ab98=0xbe2d4 *0xc82013abd0=0xbe2d4 *0xc82013ac08=0xbe2d4 *0xc82013ac40=0xbe2d4 *0xc82013ac78=0xbe2d4 *0xc82013acb0=0xbe2d4 *0xc82013ace8=0xbe2d4 *0xc82013ad20=0xbe2d4 *0xc82013ad58=0xbe2d4 *0xc82013ad90=0xbe2d4 *0xc82013adc8=0xbe2d4 *0xc82013ae00=0xbe2d4 *0xc82013ae38=0xbe2d4 *0xc82013ae70=0xbe2d4 *0xc82013aea8=0xbe2d4 *0xc82013aee0=0xbe2d4 *0xc82013af18=0xbe2d4 *0xc82013af50=0xbe2d4 *0xc82013af88=0xbe2d4 *0xc82013afc0=0xbe2d4 *0xc82013aff8=0xbe2d4 *0xc82013b030=0xbe2d4 *0xc82013b068=0xbe2d4 *0xc82013b0a0=0xbe2d4 *0xc82013b0d8=0xbe2d4 *0xc82013b110=0xbe2d4 *0xc82013b148=0xbe2d4 *0xc82013b180=0xbe2d4 *0xc82013b1b8=0xbe2d4 *0xc82013b1f0=0xbe2d4 *0xc82013b228=0xbe2d4 *0xc82013b260=0xbe2d4 *0xc82013b298=0xbe2d4 *0xc82013b2d0=0xbe2d4 *0xc82013b308=0xbe2d4 *0xc82013b340=0xbe2d4 *0xc82013b378=0xbe2d4 *0xc82013b3b0=0xbe2d4 *0xc82013b3e8=0xbe2d4 *0xc82013b420=0xbe2d4 *0xc82013b458=0xbe2d4 *0xc82013b490=0xbe2d4 *0xc82013b4c8=0xbe2d4 *0xc82013b500=0xbe2d4 *0xc82013b538=0xbe2d4 *0xc82013b570=0xbe2d4 *0xc82013b5a8=0xbe2d4 *0xc82013b5e0=0xbe2d4 *0xc82013b618=0xbe2d4 *0xc82013b650=0xbe2d4 *0xc82013b688=0xbe2d4 *0xc82013b6c0=0xbe2d4 *0xc82013b6f8=0xbe2d4 *0xc82013b730=0xbe2d4 *0xc82013b768=0xbe2d4 *0xc82013b7a0=0xbe2d4 *0xc82013b7d8=0xbe2d4 *0xc82013b810=0xbe2d4 *0xc82013b848=0xbe2d4 *0xc82013b880=0xbe2d4 *0xc82013b8b8=0xbe2d4 *0xc82013b8f0=0xbe2d4 *0xc82013b928=0xbe2d4 *0xc82013b960=0xbe2d4 *0xc82013b998=0xbe2d4 *0xc82013b9d0=0xbe2d4 *0xc82013ba08=0xbe2d4 *0xc82013ba40=0xbe2d4 *0xc82013ba78=0xbe2d4 *0xc82013bab0=0xbe2d4 *0xc82013bae8=0xbe2d4 *0xc82013bb20=0xbe2d4 *0xc82013bb58=0xbe2d4 *0xc82013bb90=0xbe2d4 *0xc82013bbc8=0xbe2d4 *0xc82013bc00=0xbe2d4 *0xc82013bc38=0xbe2d4 *0xc82013bc70=0xbe2d4 *0xc82013bca8=0xbe2d4 *0xc82013bce0=0xbe2d4 *0xc82013bd18=0xbe2d4 *0xc82013bd50=0xbe2d4 *0xc82013bd88=0xbe2d4 *0xc82013bdc0=0xbe2d4 *0xc82013bdf8=0xbe2d4 *0xc82013be30=0xbe2d4 *0xc82013be68=0xbe2d4 *0xc82013bea0=0xbe2d4 *0xc82013bed8=0xbe2d4 *0xc82013bf10=0xbe2d4 *0xc82013bf48=0xbe2d4 *0xc82013bf80=0xbe2d4 *0xc82013bfb8=0xbe2d4 *0xc82013bff0=0xbe2d4 *0xc82013c028=0xbe2d4 *0xc82013c060=0xbe2d4 *0xc82013c098=0xbe2d4 *0xc82013c0d0=0xbe2d4 *0xc82013c108=0xbe2d4 *0xc82013c140=0xbe2d4 *0xc82013c178=0xbe2d4 *0xc82013c1b0=0xbe2d4 *0xc82013c1e8=0xbe2d4 *0xc82013c220=0xbe2d4 *0xc82013c258=0xbe2d4 *0xc82013c290=0xbe2d4 *0xc82013c2c8=0xbe2d4 *0xc82013c300=0xbe2d4 *0xc82013c338=0xbe2d4 *0xc82013c370=0xbe2d4 *0xc82013c3a8=0xbe2d4 *0xc82013c3e0=0xbe2d4 *0xc82013c418=0xbe2d4 *0xc82013c450=0xbe2d4 *0xc82013c488=0xbe2d4 *0xc82013c4c0=0xbe2d4 *0xc82013c4f8=0xbe2d4 *0xc82013c530=0xbe2d4 *0xc82013c568=0xbe2d4 *0xc82013c5a0=0xbe2d4 *0xc82013c5d8=0xbe2d4 *0xc82013c610=0xbe2d4 *0xc82013c648=0xbe2d4 *0xc82013c680=0xbe2d4 *0xc82013c6b8=0xbe2d4 *0xc82013c6f0=0xbe2d4 *0xc82013c728=0xbe2d4 *0xc82013c760=0xbe2d4 *0xc82013c798=0xbe2d4 *0xc82013c7d0=0xbe2d4 *0xc82013c808=0xbe2d4 *0xc82013c840=0xbe2d4 *0xc82013c878=0xbe2d4 *0xc82013c8b0=0xbe2d4 *0xc82013c8e8=0xbe2d4 *0xc82013c920=0xbe2d4 *0xc82013c958=0xbe2d4 *0xc82013c990=0xbe2d4 *0xc82013c9c8=0xbe2d4 *0xc82013ca00=0xbe2d4 *0xc82013ca38=0xbe2d4 *0xc82013ca70=0xbe2d4 *0xc82013caa8=0xbe2d4 *0xc82013cae0=0xbe2d4 *0xc82013cb18=0xbe2d4 *0xc82013cb50=0xbe2d4 *0xc82013cb88=0xbe2d4 *0xc82013cbc0=0xbe2d4 *0xc82013cbf8=0xbe2d4 *0xc82013cc30=0xbe2d4 *0xc82013cc68=0xbe2d4 *0xc82013cca0=0xbe2d4 *0xc82013ccd8=0xbe2d4 *0xc82013cd10=0xbe2d4 *0xc82013cd48=0xbe2d4 *0xc82013cd80=0xbe2d4 *0xc82013cdb8=0xbe2d4 *0xc82013cdf0=0xbe2d4 *0xc82013ce28=0xbe2d4 *0xc82013ce60=0xbe2d4 *0xc82013ce98=0xbe2d4 *0xc82013ced0=0xbe2d4 *0xc82013cf08=0xbe2d4 *0xc82013cf40=0xbe2d4 *0xc82013cf78=0xbe2d4 *0xc82013cfb0=0xbe2d4 *0xc82013cfe8=0xbe2d4 *0xc82013d020=0xbe2d4 *0xc82013d058=0xbe2d4 *0xc82013d090=0xbe2d4 *0xc82013d0c8=0xbe2d4 *0xc82013d100=0xbe2d4 *0xc82013d138=0xbe2d4 *0xc82013d170=0xbe2d4 *0xc82013d1a8=0xbe2d4 *0xc82013d1e0=0xbe2d4 *0xc82013d218=0xbe2d4 *0xc82013d250=0xbe2d4 *0xc82013d288=0xbe2d4 *0xc82013d2c0=0xbe2d4 *0xc82013d2f8=0xbe2d4 *0xc82013d330=0xbe2d4 *0xc82013d368=0xbe2d4 *0xc82013d3a0=0xbe2d4 *0xc82013d3d8=0xbe2d4 *0xc82013d410=0xbe2d4 *0xc82013d448=0xbe2d4 *0xc82013d480=0xbe2d4 *0xc82013d4b8=0xbe2d4 *0xc82013d4f0=0xbe2d4 *0xc82013d528=0xbe2d4 *0xc82013d560=0xbe2d4 *0xc82013d598=0xbe2d4 *0xc82013d5d0=0xbe2d4 *0xc82013d608=0xbe2d4 *0xc82013d640=0xbe2d4 *0xc82013d678=0xbe2d4 *0xc82013d6b0=0xbe2d4 *0xc82013d6e8=0xbe2d4 *0xc82013d720=0xbe2d4 *0xc82013d758=0xbe2d4 *0xc82013d790=0xbe2d4 *0xc82013d7c8=0xbe2d4 *0xc82013d800=0xbe2d4 *0xc82013d838=0xbe2d4 *0xc82013d870=0xbe2d4 *0xc82013d8a8=0xbe2d4 *0xc82013d8e0=0xbe2d4 *0xc82013d918=0xbe2d4 *0xc82013d950=0xbe2d4 *0xc82013d988=0xbe2d4 *0xc82013d9c0=0xbe2d4 *0xc82013d9f8=0xbe2d4 *0xc82013da30=0xbe2d4 *0xc82013da68=0xbe2d4 *0xc82013daa0=0xbe2d4 *0xc82013dad8=0xbe2d4 *0xc82013db10=0xbe2d4 *0xc82013db48=0xbe2d4 *0xc82013db80=0xbe2d4 *0xc82013dbb8=0xbe2d4 *0xc82013dbf0=0xbe2d4 *0xc82013dc28=0xbe2d4 *0xc82013dc60=0xc0aac *0xc82013dc98=0xbc378 *0xc82013dcc8=0xbe1f0 *0xc82013de30=0xac23c *0xc82013df90=0x8ff2c]
fatal error: missed stack barrier

    goroutine 0 [idle]:
    runtime.throw(0x1b6913, 0x14)
        /home/a/src/git/go-official/src/runtime/panic.go:566 +0xc0
    runtime.gentraceback(0xbe2ec, 0xc820137670, 0xbe2d4, 0xc820000f00, 0x0, 0xc8200ad8f8, 0x40, 0x0, 0x0, 0x6, ...)
        /home/a/src/git/go-official/src/runtime/traceback.go:296 +0x1778
    runtime.sigprof(0xbe2ec, 0xc820137670, 0xbe2d4, 0xc820000f00, 0xc82016ac00)
        /home/a/src/git/go-official/src/runtime/proc.go:3078 +0x6e8
    runtime.sighandler(0xc80000001d, 0xc8200adce8, 0xc8200add68, 0xc820000f00)
        /home/a/src/git/go-official/src/runtime/signal_mips64x.go:64 +0x104
    runtime.sigtrampgo(0x1d, 0xc8200adce8, 0xc8200add68)
        /home/a/src/git/go-official/src/runtime/signal_sigtramp.go:48 +0x140
    runtime.sigtramp(0xc82004e310, 0x0, 0x800000001d, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1f64c, ...)
        /home/a/src/git/go-official/src/runtime/sys_linux_mips64x.s:249 +0x48

    goroutine 6 [running]:

FAIL

See also e.g. http://build.golang.org/log/a97d7fbc0505b36b32e5c4865503993ce497a914

[cherrymui]

@aclements

[aclements]

This is most likely the same issue as the TestStackBarrierProfiling failures in #15138.

[gopherbot]

CL https://golang.org/cl/23291 mentions this issue.

[cherrymui]

Update:
with the current tip (1f8d276), the failure is even rarer, only 1 failure over 2000 runs, and it looks a different failure:

=== RUN   TestStackBarrierProfiling
--- FAIL: TestStackBarrierProfiling (1.94s)
    pprof_test.go:393: subprocess failed with exit status 2:
        runtime: invalid pc-encoded table f=runtime.asminit pc=0x90c00 targetpc=0x90c00 tab=[0/0]0x0
            value=0 until pc=0x90c00
        fatal error: invalid runtime symbol table

        goroutine 0 [idle]:
        runtime.throw(0x1b5f2e, 0x1c)
            /home/a/src/git/go-official/src/runtime/panic.go:566 +0xb8 fp=0xc42005f360 sp=0xc42005f348
        runtime.pcvalue(0x1f7140, 0x2d439, 0x90c00, 0xc42005f638, 0x80301, 0x90c00)
            /home/a/src/git/go-official/src/runtime/symtab.go:472 +0x5a8 fp=0xc42005f528 sp=0xc42005f360
        runtime.funcspdelta(0x1f7140, 0x90c00, 0xc42005f638, 0x200)
            /home/a/src/git/go-official/src/runtime/symtab.go:511 +0x64 fp=0xc42005f590 sp=0xc42005f528
        runtime.gentraceback(0x7697c, 0xc420036ac8, 0x766a4, 0xc420001040, 0x0, 0xc42005f8b0, 0x40, 0x0, 0x0, 0x6, ...)
            /home/a/src/git/go-official/src/runtime/traceback.go:263 +0xbe0 fp=0xc42005f830 sp=0xc42005f590
        runtime.sigprof(0x7697c, 0xc420036ac8, 0x766a4, 0xc420001040, 0xc42002c800)
            /home/a/src/git/go-official/src/runtime/proc.go:3123 +0x8b4 fp=0xc42005fb58 sp=0xc42005f830
        runtime.sighandler(0xc40000001d, 0xc42005fce8, 0xc42005fd68, 0xc420001040)
            /home/a/src/git/go-official/src/runtime/signal_mips64x.go:64 +0x104 fp=0xc42005fbf0 sp=0xc42005fb58
        runtime.sigtrampgo(0x1d, 0xc42005fce8, 0xc42005fd68)
            /home/a/src/git/go-official/src/runtime/signal_sigtramp.go:48 +0x140 fp=0xc42005fc88 sp=0xc42005fbf0
        runtime.sigtramp(0x0, 0x0, 0x800000001d, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
            /home/a/src/git/go-official/src/runtime/sys_linux_mips64x.s:254 +0x5c fp=0xc42005fcd0 sp=0xc42005fc88

        goroutine 4 [running]:
        runtime.systemstack_switch()
            /home/a/src/git/go-official/src/runtime/asm_mips64x.s:171 +0x8 fp=0xc420041690 sp=0xc420041688
        runtime.markroot(0xc42001f228, 0xc400000006)
            /home/a/src/git/go-official/src/runtime/mgcmark.go:239 +0x704 fp=0xc420041718 sp=0xc420041690
        runtime.gcDrain(0xc42001f228, 0x5)
            /home/a/src/git/go-official/src/runtime/mgcmark.go:950 +0x3f4 fp=0xc420041760 sp=0xc420041718
        runtime.gcBgMarkWorker(0xc42001e000)
            /home/a/src/git/go-official/src/runtime/mgc.go:1453 +0x830 fp=0xc4200417d0 sp=0xc420041760
        runtime.goexit()
            /home/a/src/git/go-official/src/runtime/asm_mips64x.s:875 +0x4 fp=0xc4200417d0 sp=0xc4200417d0
        created by runtime.gcBgMarkStartWorkers
            /home/a/src/git/go-official/src/runtime/mgc.go:1342 +0xcc

        goroutine 1 [chan receive (scan)]:
        runtime.gopark(0x1c5a40, 0xc42005a2f8, 0x1b28cc, 0xc, 0x17, 0x3)
            /home/a/src/git/go-official/src/runtime/proc.go:265 +0x210 fp=0xc420077a58 sp=0xc420077a30
        runtime.goparkunlock(0xc42005a2f8, 0x1b28cc, 0xc, 0x25a717, 0x3)
            /home/a/src/git/go-official/src/runtime/proc.go:271 +0x6c fp=0xc420077a90 sp=0xc420077a58
        runtime.chanrecv(0x185280, 0xc42005a2a0, 0x0, 0xc420077b01, 0xb0000)
            /home/a/src/git/go-official/src/runtime/chan.go:496 +0x640 fp=0xc420077b18 sp=0xc420077a90
        runtime.chanrecv1(0x185280, 0xc42005a2a0, 0x0)
            /home/a/src/git/go-official/src/runtime/chan.go:378 +0x34 fp=0xc420077b48 sp=0xc420077b18
        testing.(*T).Run(0xc42007c0c0, 0x1b529d, 0x19, 0x1c5bf0, 0x25f01)
            /home/a/src/git/go-official/src/testing/testing.go:584 +0x468 fp=0xc420077c18 sp=0xc420077b48
        testing.RunTests.func1(0xc42007c000)
            /home/a/src/git/go-official/src/testing/testing.go:730 +0xe8 fp=0xc420077ca8 sp=0xc420077c18
        testing.tRunner(0xc42007c000, 0xc420077de8)
            /home/a/src/git/go-official/src/testing/testing.go:547 +0xf8 fp=0xc420077ce0 sp=0xc420077ca8
        testing.RunTests(0x1c5688, 0x253ca0, 0x9, 0x9, 0x1)
            /home/a/src/git/go-official/src/testing/testing.go:736 +0x4f4 fp=0xc420077e08 sp=0xc420077ce0
        testing.(*M).Run(0xc420077f38, 0x6f01f2cb31cc7202)
            /home/a/src/git/go-official/src/testing/testing.go:680 +0xf8 fp=0xc420077e90 sp=0xc420077e08
        main.main()
            runtime/pprof/_test/_testmain.go:72 +0x15c fp=0xc420077f88 sp=0xc420077e90
        runtime.main()
            /home/a/src/git/go-official/src/runtime/proc.go:189 +0x3f8 fp=0xc420077fd8 sp=0xc420077f88
        runtime.goexit()
            /home/a/src/git/go-official/src/runtime/asm_mips64x.s:875 +0x4 fp=0xc420077fd8 sp=0xc420077fd8

        goroutine 2 [force gc (idle)]:
        runtime.gopark(0x1c5a40, 0x259cc0, 0x1b30c7, 0xf, 0x14, 0x1)
            /home/a/src/git/go-official/src/runtime/proc.go:265 +0x210 fp=0xc420026370 sp=0xc420026348
        runtime.goparkunlock(0x259cc0, 0x1b30c7, 0xf, 0xc420000114, 0x1)
            /home/a/src/git/go-official/src/runtime/proc.go:271 +0x6c fp=0xc4200263a8 sp=0xc420026370
        runtime.forcegchelper()
            /home/a/src/git/go-official/src/runtime/proc.go:230 +0x134 fp=0xc4200263d8 sp=0xc4200263a8
        runtime.goexit()
            /home/a/src/git/go-official/src/runtime/asm_mips64x.s:875 +0x4 fp=0xc4200263d8 sp=0xc4200263d8
        created by runtime.init.4
            /home/a/src/git/go-official/src/runtime/proc.go:219 +0x4c

        goroutine 3 [runnable]:
        runtime.Gosched()
            /home/a/src/git/go-official/src/runtime/proc.go:244 +0x20 fp=0xc420042798 sp=0xc420042788
        runtime.bgsweep(0xc42004e000)
            /home/a/src/git/go-official/src/runtime/mgcsweep.go:68 +0x154 fp=0xc4200427d0 sp=0xc420042798
        runtime.goexit()
            /home/a/src/git/go-official/src/runtime/asm_mips64x.s:875 +0x4 fp=0xc4200427d0 sp=0xc4200427d0
        created by runtime.gcenable
            /home/a/src/git/go-official/src/runtime/mgc.go:195 +0x78

        goroutine 5 [finalizer wait]:
        runtime.gopark(0x1c5a40, 0x272f38, 0x1b2e15, 0xe, 0x14, 0x1)
            /home/a/src/git/go-official/src/runtime/proc.go:265 +0x210 fp=0xc420025b30 sp=0xc420025b08
        runtime.goparkunlock(0x272f38, 0x1b2e15, 0xe, 0x14, 0x1)
            /home/a/src/git/go-official/src/runtime/proc.go:271 +0x6c fp=0xc420025b68 sp=0xc420025b30
        runtime.runfinq()
            /home/a/src/git/go-official/src/runtime/mfinal.go:158 +0xf4 fp=0xc420025bd8 sp=0xc420025b68
        runtime.goexit()
            /home/a/src/git/go-official/src/runtime/asm_mips64x.s:875 +0x4 fp=0xc420025bd8 sp=0xc420025bd8
        created by runtime.createfing
            /home/a/src/git/go-official/src/runtime/mfinal.go:139 +0xc0

        goroutine 6 [GC assist wait]:
        runtime.gopark(0x1c5a40, 0x25a3d8, 0x1b2d27, 0xe, 0x25f14, 0x2)
            /home/a/src/git/go-official/src/runtime/proc.go:265 +0x210 fp=0xc4200afa28 sp=0xc4200afa00
        runtime.goparkunlock(0x25a3d8, 0x1b2d27, 0xe, 0x25a314, 0x2)
            /home/a/src/git/go-official/src/runtime/proc.go:271 +0x6c fp=0xc4200afa60 sp=0xc4200afa28
        runtime.gcAssistAlloc(0xc4200011e0)
            /home/a/src/git/go-official/src/runtime/mgcmark.go:553 +0x464 fp=0xc4200afae0 sp=0xc4200afa60
        runtime.mallocgc(0x400, 0x184d00, 0x25e01, 0x25fd0)
            /home/a/src/git/go-official/src/runtime/malloc.go:563 +0x1b8 fp=0xc4200afbb0 sp=0xc4200afae0
        runtime.makeslice(0x184d00, 0x400, 0x400, 0x0, 0x0, 0x0)
            /home/a/src/git/go-official/src/runtime/slice.go:57 +0x128 fp=0xc4200afc00 sp=0xc4200afbb0
        runtime/pprof_test.deepStack(0x78, 0xc42007e400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:419 +0x78 fp=0xc4200afc38 sp=0xc4200afc00
        runtime/pprof_test.deepStack(0x79, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afc70 sp=0xc4200afc38
        runtime/pprof_test.deepStack(0x7a, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afca8 sp=0xc4200afc70
        runtime/pprof_test.deepStack(0x7b, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afce0 sp=0xc4200afca8
        runtime/pprof_test.deepStack(0x7c, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afd18 sp=0xc4200afce0
        runtime/pprof_test.deepStack(0x7d, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afd50 sp=0xc4200afd18
        runtime/pprof_test.deepStack(0x7e, 0xc42007e000)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afd88 sp=0xc4200afd50
        runtime/pprof_test.deepStack(0x7f, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afdc0 sp=0xc4200afd88
        runtime/pprof_test.deepStack(0x80, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afdf8 sp=0xc4200afdc0
        runtime/pprof_test.deepStack(0x81, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afe30 sp=0xc4200afdf8
        runtime/pprof_test.deepStack(0x82, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afe68 sp=0xc4200afe30
        runtime/pprof_test.deepStack(0x83, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afea0 sp=0xc4200afe68
        runtime/pprof_test.deepStack(0x84, 0xc42007e400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afed8 sp=0xc4200afea0
        runtime/pprof_test.deepStack(0x85, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200aff10 sp=0xc4200afed8
        runtime/pprof_test.deepStack(0x86, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200aff48 sp=0xc4200aff10
        runtime/pprof_test.deepStack(0x87, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200aff80 sp=0xc4200aff48
        runtime/pprof_test.deepStack(0x88, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200affb8 sp=0xc4200aff80
        runtime/pprof_test.deepStack(0x89, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200afff0 sp=0xc4200affb8
        runtime/pprof_test.deepStack(0x8a, 0xc42007e000)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0028 sp=0xc4200afff0
        runtime/pprof_test.deepStack(0x8b, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0060 sp=0xc4200b0028
        runtime/pprof_test.deepStack(0x8c, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0098 sp=0xc4200b0060
        runtime/pprof_test.deepStack(0x8d, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b00d0 sp=0xc4200b0098
        runtime/pprof_test.deepStack(0x8e, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0108 sp=0xc4200b00d0
        runtime/pprof_test.deepStack(0x8f, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0140 sp=0xc4200b0108
        runtime/pprof_test.deepStack(0x90, 0xc42007e400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0178 sp=0xc4200b0140
        runtime/pprof_test.deepStack(0x91, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b01b0 sp=0xc4200b0178
        runtime/pprof_test.deepStack(0x92, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b01e8 sp=0xc4200b01b0
        runtime/pprof_test.deepStack(0x93, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0220 sp=0xc4200b01e8
        runtime/pprof_test.deepStack(0x94, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0258 sp=0xc4200b0220
        runtime/pprof_test.deepStack(0x95, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0290 sp=0xc4200b0258
        runtime/pprof_test.deepStack(0x96, 0xc42007e000)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b02c8 sp=0xc4200b0290
        runtime/pprof_test.deepStack(0x97, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0300 sp=0xc4200b02c8
        runtime/pprof_test.deepStack(0x98, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0338 sp=0xc4200b0300
        runtime/pprof_test.deepStack(0x99, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0370 sp=0xc4200b0338
        runtime/pprof_test.deepStack(0x9a, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b03a8 sp=0xc4200b0370
        runtime/pprof_test.deepStack(0x9b, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b03e0 sp=0xc4200b03a8
        runtime/pprof_test.deepStack(0x9c, 0xc42007e400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0418 sp=0xc4200b03e0
        runtime/pprof_test.deepStack(0x9d, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0450 sp=0xc4200b0418
        runtime/pprof_test.deepStack(0x9e, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0488 sp=0xc4200b0450
        runtime/pprof_test.deepStack(0x9f, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b04c0 sp=0xc4200b0488
        runtime/pprof_test.deepStack(0xa0, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b04f8 sp=0xc4200b04c0
        runtime/pprof_test.deepStack(0xa1, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0530 sp=0xc4200b04f8
        runtime/pprof_test.deepStack(0xa2, 0xc42007e000)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0568 sp=0xc4200b0530
        runtime/pprof_test.deepStack(0xa3, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b05a0 sp=0xc4200b0568
        runtime/pprof_test.deepStack(0xa4, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b05d8 sp=0xc4200b05a0
        runtime/pprof_test.deepStack(0xa5, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0610 sp=0xc4200b05d8
        runtime/pprof_test.deepStack(0xa6, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0648 sp=0xc4200b0610
        runtime/pprof_test.deepStack(0xa7, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0680 sp=0xc4200b0648
        runtime/pprof_test.deepStack(0xa8, 0xc42007e400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b06b8 sp=0xc4200b0680
        runtime/pprof_test.deepStack(0xa9, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b06f0 sp=0xc4200b06b8
        runtime/pprof_test.deepStack(0xaa, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0728 sp=0xc4200b06f0
        runtime/pprof_test.deepStack(0xab, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0760 sp=0xc4200b0728
        runtime/pprof_test.deepStack(0xac, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0798 sp=0xc4200b0760
        runtime/pprof_test.deepStack(0xad, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b07d0 sp=0xc4200b0798
        runtime/pprof_test.deepStack(0xae, 0xc42007e000)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0808 sp=0xc4200b07d0
        runtime/pprof_test.deepStack(0xaf, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0840 sp=0xc4200b0808
        runtime/pprof_test.deepStack(0xb0, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0878 sp=0xc4200b0840
        runtime/pprof_test.deepStack(0xb1, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b08b0 sp=0xc4200b0878
        runtime/pprof_test.deepStack(0xb2, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b08e8 sp=0xc4200b08b0
        runtime/pprof_test.deepStack(0xb3, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0920 sp=0xc4200b08e8
        runtime/pprof_test.deepStack(0xb4, 0xc42007e400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0958 sp=0xc4200b0920
        runtime/pprof_test.deepStack(0xb5, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0990 sp=0xc4200b0958
        runtime/pprof_test.deepStack(0xb6, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b09c8 sp=0xc4200b0990
        runtime/pprof_test.deepStack(0xb7, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0a00 sp=0xc4200b09c8
        runtime/pprof_test.deepStack(0xb8, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0a38 sp=0xc4200b0a00
        runtime/pprof_test.deepStack(0xb9, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0a70 sp=0xc4200b0a38
        runtime/pprof_test.deepStack(0xba, 0xc42007e000)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0aa8 sp=0xc4200b0a70
        runtime/pprof_test.deepStack(0xbb, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0ae0 sp=0xc4200b0aa8
        runtime/pprof_test.deepStack(0xbc, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0b18 sp=0xc4200b0ae0
        runtime/pprof_test.deepStack(0xbd, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0b50 sp=0xc4200b0b18
        runtime/pprof_test.deepStack(0xbe, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0b88 sp=0xc4200b0b50
        runtime/pprof_test.deepStack(0xbf, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0bc0 sp=0xc4200b0b88
        runtime/pprof_test.deepStack(0xc0, 0xc42007e400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0bf8 sp=0xc4200b0bc0
        runtime/pprof_test.deepStack(0xc1, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0c30 sp=0xc4200b0bf8
        runtime/pprof_test.deepStack(0xc2, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0c68 sp=0xc4200b0c30
        runtime/pprof_test.deepStack(0xc3, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0ca0 sp=0xc4200b0c68
        runtime/pprof_test.deepStack(0xc4, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0cd8 sp=0xc4200b0ca0
        runtime/pprof_test.deepStack(0xc5, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0d10 sp=0xc4200b0cd8
        runtime/pprof_test.deepStack(0xc6, 0xc42007e000)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0d48 sp=0xc4200b0d10
        runtime/pprof_test.deepStack(0xc7, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0d80 sp=0xc4200b0d48
        runtime/pprof_test.deepStack(0xc8, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0db8 sp=0xc4200b0d80
        runtime/pprof_test.deepStack(0xc9, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0df0 sp=0xc4200b0db8
        runtime/pprof_test.deepStack(0xca, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0e28 sp=0xc4200b0df0
        runtime/pprof_test.deepStack(0xcb, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0e60 sp=0xc4200b0e28
        runtime/pprof_test.deepStack(0xcc, 0xc42007e400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0e98 sp=0xc4200b0e60
        runtime/pprof_test.deepStack(0xcd, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0ed0 sp=0xc4200b0e98
        runtime/pprof_test.deepStack(0xce, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0f08 sp=0xc4200b0ed0
        runtime/pprof_test.deepStack(0xcf, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0f40 sp=0xc4200b0f08
        runtime/pprof_test.deepStack(0xd0, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0f78 sp=0xc4200b0f40
        runtime/pprof_test.deepStack(0xd1, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0fb0 sp=0xc4200b0f78
        runtime/pprof_test.deepStack(0xd2, 0xc42007e000)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b0fe8 sp=0xc4200b0fb0
        runtime/pprof_test.deepStack(0xd3, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b1020 sp=0xc4200b0fe8
        runtime/pprof_test.deepStack(0xd4, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b1058 sp=0xc4200b1020
        runtime/pprof_test.deepStack(0xd5, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b1090 sp=0xc4200b1058
        runtime/pprof_test.deepStack(0xd6, 0x400)
            /home/a/src/git/go-official/src/runtime/pprof/pprof_test.go:420 +0xd8 fp=0xc4200b10c8 sp=0xc4200b1090
        ...additional frames elided...
        created by testing.(*T).Run
            /home/a/src/git/go-official/src/testing/testing.go:583 +0x43c

        goroutine 7 [syscall]:
        runtime.notetsleepg(0xfff7154008, 0xffffffffffffffff, 0x0)
            /home/a/src/git/go-official/src/runtime/lock_futex.go:205 +0x78 fp=0xc420040638 sp=0xc420040610
        runtime.(*cpuProfile).getprofile(0xfff7154000, 0x0, 0x0, 0x0)
            /home/a/src/git/go-official/src/runtime/cpuprof.go:341 +0x79c fp=0xc420040740 sp=0xc420040638
        runtime.CPUProfile(0x0, 0x0, 0x0)
            /home/a/src/git/go-official/src/runtime/cpuprof.go:421 +0x50 fp=0xc420040768 sp=0xc420040740
        runtime/pprof.profileWriter(0x2412c0, 0xc42007a000)
            /home/a/src/git/go-official/src/runtime/pprof/pprof.go:617 +0x34 fp=0xc4200407c8 sp=0xc420040768
        runtime.goexit()
            /home/a/src/git/go-official/src/runtime/asm_mips64x.s:875 +0x4 fp=0xc4200407c8 sp=0xc4200407c8
        created by runtime/pprof.StartCPUProfile
            /home/a/src/git/go-official/src/runtime/pprof/pprof.go:611 +0x1d8

        goroutine 8 [syscall]:
        runtime.notetsleepg(0x259f78, 0x129e163a7, 0x0)
            /home/a/src/git/go-official/src/runtime/lock_futex.go:205 +0x78 fp=0xc420024b50 sp=0xc420024b28
        runtime.timerproc()
            /home/a/src/git/go-official/src/runtime/time.go:209 +0x154 fp=0xc420024bd8 sp=0xc420024b50
        runtime.goexit()
            /home/a/src/git/go-official/src/runtime/asm_mips64x.s:875 +0x4 fp=0xc420024bd8 sp=0xc420024bd8
        created by runtime.addtimerLocked
            /home/a/src/git/go-official/src/runtime/time.go:116 +0x24c
FAIL

[aclements]

Interesting. This new failure does look different, though it's also in the stack jumping code, just like the problem that caused the unexpected stack barrier turned out to be. Perhaps the missing frame.sp isn't the only issue that sequence has on LR machines.

[aclements]

Actually, I take that back. The failing line in gentraceback is right after the stack jump code, but I don't think the stack jump triggered in this case, since the error is saying that f is asminit, but it would have had to be systemstack for the jump to trigger.

[rsc]

It's got to be the systemstack switch. That's the running goroutine on the m that is doing the profiling. It's the only stack that would be being traced. And we just found a bug in the code. Obviously f=asminit means that we didn't just go over the switch. But maybe we went over the switch one frame earlier and got out of sync, causing the next frame to pick up a reference to asminit from somewhere. It's equally clear nothing relevant is actually calling asminit, which returns immediately and never makes any calls. asminit's PC shouldn't even appear on the stack (and it only runs on thread startup anyway).

[ianlancetaylor]

Postponing to 1.8.