Closed
Description
What version of Go are you using (go version)?
$ go version go version go1.13.2 linux/amd64 go version go1.13.3 linux/amd64 go version go1.14.2 linux/amd64
Does this issue reproduce with the latest release?
Yes.
What operating system and processor architecture are you using (go env)?
go env Output
$ go env GO111MODULE="" GOARCH="amd64" GOBIN="" GOCACHE="/home/bozaro/.cache/go-build" GOENV="/home/bozaro/.config/go/env" GOEXE="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="linux" GONOPROXY="" GONOSUMDB="github.com/joomcode/*" GOOS="linux" GOPATH="/home/bozaro/go" GOPRIVATE="" GOPROXY="https://proxy.golang.org,direct" GOROOT="/home/bozaro/sdk/go-1.13.3" GOSUMDB="sum.golang.org" GOTMPDIR="" GOTOOLDIR="/home/bozaro/sdk/go-1.13.3/pkg/tool/linux_amd64" GCCGO="gccgo" AR="ar" CC="gcc" CXX="g++" CGO_ENABLED="1" GOMOD="/home/bozaro/github/debug/go.mod" CGO_CFLAGS="-g -O2" CGO_CPPFLAGS="" CGO_CXXFLAGS="-g -O2" CGO_FFLAGS="-g -O2" CGO_LDFLAGS="-g -O2" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build072895212=/tmp/go-build -gno-record-gcc-switches"
What did you do?
Make some dumps with steps from https://github.com/golang/debug/blob/master/internal/gocore/testdata/README
With go 1.13.2 it's works as expected:
> go build -o test . && GOTRACEBACK=crash ./test || viewcore core --exe test histogram
[1] 19749 abort (core dumped) GOTRACEBACK=crash ./test
count size bytes type
5 384 1920 runtime.g
1 1152 1152 [70+2?]string
1 896 896 runtime.m
1 480 480 [15]internal/cpu.option
1 112 112 unk112
1 96 96 [12]*runtime.p
1 96 96 hchan<bool>
1 64 64 runtime.timer
1 32 32 []*runtime.moduledata
1 32 32 [4]*runtime.g
1 16 16 [4]uint32
1 16 16 string
But with go 1.13.3 I got panic:
[1] 23671 abort (core dumped) GOTRACEBACK=crash ./test
panic: check failed for heap: 67108864 vs 720896
goroutine 1 [running]:
golang.org/x/debug/internal/gocore.(*Process).readSpans.func2(0xc0006d61e0)
/home/bozaro/github/debug/internal/gocore/process.go:457 +0x1e3
golang.org/x/debug/internal/gocore.(*Process).readSpans.func2(0xc0006d60f0)
/home/bozaro/github/debug/internal/gocore/process.go:460 +0x8f
golang.org/x/debug/internal/gocore.(*Process).readSpans(0xc000158000, 0xc000158000, 0x5717c0, 0xc0003b1040, 0xc000791a70, 0x1, 0x1)
/home/bozaro/github/debug/internal/gocore/process.go:463 +0x1bd0
golang.org/x/debug/internal/gocore.(*Process).readHeap(0xc000158000)
/home/bozaro/github/debug/internal/gocore/process.go:262 +0x77b
golang.org/x/debug/internal/gocore.Core(0xc00020e000, 0x4, 0x0, 0x0)
/home/bozaro/github/debug/internal/gocore/process.go:156 +0x2c4
main.readCore(0xc00020a300, 0x8bfb3d, 0x3, 0x0)
/home/bozaro/github/debug/cmd/viewcore/main.go:265 +0xd2
main.runHistogram(0xc50120, 0xc0001263c0, 0x0, 0x2)
/home/bozaro/github/debug/cmd/viewcore/main.go:457 +0xdd
github.com/spf13/cobra.(*Command).execute(0xc50120, 0xc000126360, 0x2, 0x2, 0xc50120, 0xc000126360)
/home/bozaro/go/pkg/mod/github.com/spf13/[email protected]/command.go:766 +0x29d
github.com/spf13/cobra.(*Command).ExecuteC(0xc4f7a0, 0x8bf822, 0x1, 0xc000207f00)
/home/bozaro/go/pkg/mod/github.com/spf13/[email protected]/command.go:852 +0x2ea
github.com/spf13/cobra.(*Command).Execute(...)
/home/bozaro/go/pkg/mod/github.com/spf13/[email protected]/command.go:800
main.main()
/home/bozaro/github/debug/cmd/viewcore/main.go:243 +0x104
With go 1.14.2 I got another panic:
[1] 23046 abort (core dumped) GOTRACEBACK=crash ./test
panic: bad uint8 type runtime.mSpanStateBox
goroutine 1 [running]:
golang.org/x/debug/internal/gocore.region.Uint8(0xc0000be9a0, 0x7fb61e18516b, 0xc000433720, 0x8c019d)
/home/bozaro/github/debug/internal/gocore/region.go:100 +0xc6
golang.org/x/debug/internal/gocore.(*Process).readSpans(0xc0000be9a0, 0xc0000be9a0, 0x4e7280, 0xc000706550, 0xc000620300, 0x1, 0x1)
/home/bozaro/github/debug/internal/gocore/process.go:349 +0x566
golang.org/x/debug/internal/gocore.(*Process).readHeap(0xc0000be9a0)
/home/bozaro/github/debug/internal/gocore/process.go:262 +0x77b
golang.org/x/debug/internal/gocore.Core(0xc0000f2000, 0x4, 0x0, 0x0)
/home/bozaro/github/debug/internal/gocore/process.go:156 +0x2c4
main.readCore(0xc0000ee300, 0x8bfb3d, 0x3, 0x0)
/home/bozaro/github/debug/cmd/viewcore/main.go:265 +0xd2
main.runHistogram(0xc50120, 0xc00000e3c0, 0x0, 0x2)
/home/bozaro/github/debug/cmd/viewcore/main.go:457 +0xdd
github.com/spf13/cobra.(*Command).execute(0xc50120, 0xc00000e360, 0x2, 0x2, 0xc50120, 0xc00000e360)
/home/bozaro/go/pkg/mod/github.com/spf13/[email protected]/command.go:766 +0x29d
github.com/spf13/cobra.(*Command).ExecuteC(0xc4f7a0, 0x8bf822, 0x1, 0xc0000ebf00)
/home/bozaro/go/pkg/mod/github.com/spf13/[email protected]/command.go:852 +0x2ea
github.com/spf13/cobra.(*Command).Execute(...)
/home/bozaro/go/pkg/mod/github.com/spf13/[email protected]/command.go:800
main.main()
/home/bozaro/github/debug/cmd/viewcore/main.go:243 +0x104
I try update golang.org/x/sys vendor to v0.0.0-20200420163511-1957bb5e6d1f but behavior has not changed.