Issue 67980043: code review 67980043: runtime: fix heap memory corruption

Issue 67980043: code review 67980043: runtime: fix heap memory corruption (Closed)

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Created:
10 years, 2 months ago by dvyukov

Modified:
10 years, 2 months ago

Reviewers:
rsc

CC:
golang-codereviews, minux1, rsc, khr

Visibility:
Public.

Description

runtime: fix heap memory corruption With concurrent sweeping finc if modified by runfinq and queuefinalizer concurrently. Fixes crashes like this one: http://build.golang.org/log/6ad7b59ef2e93e3c9347eabfb4c4bd66df58fd5a Fixes issue 7324. Update issue 7396

Patch Set 1 #

Patch Set 2 : diff -r cf5dd8accd5e https://dvyukov%40google.com@code.google.com/p/go/ #

Patch Set 3 : diff -r cf5dd8accd5e https://dvyukov%40google.com@code.google.com/p/go/ #

Patch Set 4 : diff -r de23a6a5048d https://dvyukov%40google.com@code.google.com/p/go/ #

Created: 10 years, 2 months ago

Download [raw] [tar.bz2]

		Unified diffs	Side-by-side diffs	Delta from patch set	Stats (+3 lines, -1 line)			Patch
	M	src/pkg/runtime/mgc0.c	View	1 2 3	2 chunks	+3 lines, -1 line	0 comments	Download

Messages

Total messages: 10

Expand All Messages | Collapse All Messages

dvyukov

Hello golang-codereviews@googlegroups.com (cc: khr@golang.org, rsc@golang.org), I'd like you to review this change to https://dvyukov%40google.com@code.google.com/p/go/

10 years, 2 months ago (2014-02-24 08:01:27 UTC) #1

minux1

Unfortunately, this doesn't fix the crash on DflyBSD during go test -v -short std, it ...

10 years, 2 months ago (2014-02-24 08:12:41 UTC) #2

Unfortunately, this doesn't fix the crash on DflyBSD during go test -v
-short std,
it could be reproduced 100% on that system:

...
ok   go/format 0.015s
ok   go/parser 0.068s
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x8c27a0]

goroutine 419 [running]:
runtime.panic(0x7cd920, 0xce2ae8)
 /home/minux/build/go.hg/src/pkg/runtime/panic.c:250 +0xb4
runtime: unexpected return pc for runtime.sigpanic called from 0x8c27a0

goroutine 16 [semacquire]:
sync.runtime_Semacquire(0xc20856df8c)
/home/minux/build/go.hg/src/pkg/runtime/sema.goc:199 +0x30
sync.(*WaitGroup).Wait(0xc208381b00)
/home/minux/build/go.hg/src/pkg/sync/waitgroup.go:127 +0x15d
main.(*builder).do(0xc2080589a0, 0xc20856bd40)
/home/minux/build/go.hg/src/cmd/go/build.go:745 +0x440
main.runTest(0xce1940, 0xc20800c020, 0x3, 0x3)
 /home/minux/build/go.hg/src/cmd/go/test.go:503 +0x22f9
main.main()
/home/minux/build/go.hg/src/cmd/go/main.go:161 +0x4fb

goroutine 19 [syscall]:
os/signal.loop()
/home/minux/build/go.hg/src/pkg/os/signal/signal_unix.go:21 +0x1e
created by os/signal.init·1
/home/minux/build/go.hg/src/pkg/os/signal/signal_unix.go:27 +0x31

goroutine 21 [syscall]:
syscall.Syscall6(0x7, 0x8bbc, 0x800e0909c, 0x0, 0xc2089d6c60, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
syscall.wait4(0x8bbc, 0x800e0909c, 0x0, 0xc2089d6c60, 0x478212, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
syscall.Wait4(0x8bbc, 0x800e090e4, 0x0, 0xc2089d6c60, 0xc208a69f90, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
os.(*Process).wait(0xc2084c1a20, 0x0, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
os.(*Process).Wait(0xc2084c1a20, 0xc208c43f40, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
os/exec.(*Cmd).Wait(0xc2089d8a00, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
os/exec.(*Cmd).Run(0xc2089d8a00, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
main.(*builder).runOut(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
main.(*builder).run(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1311 +0xe6
main.gcToolchain.ld(0xc2080589a0, 0xc208612400, 0xc208484300, 0x34,
0xc20888c000, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1759 +0x1005
main.gcToolchain.ld·i(0x0, 0xc2080589a0, 0xc208612400, 0xc208484300, 0x34,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1 +0xe3
main.(*builder).build(0xc2080589a0, 0xc20856ba00, 0x0, 0x0)
 /home/minux/build/go.hg/src/cmd/go/build.go:985 +0x349c
main.func·005(0xc20856ba00)
/home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
main.func·006()
/home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
created by main.(*builder).do
 /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416

goroutine 22 [syscall]:
syscall.Syscall6(0x7, 0x8bc1, 0x800e071e4, 0x0, 0xc2089d6240, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
syscall.wait4(0x8bc1, 0x800e071e4, 0x0, 0xc2089d6240, 0x478212, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
syscall.Wait4(0x8bc1, 0x800e0722c, 0x0, 0xc2089d6240, 0xc208a3e1e0, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
os.(*Process).wait(0xc2084bfe00, 0x0, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
os.(*Process).Wait(0xc2084bfe00, 0xc2080c7950, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
os/exec.(*Cmd).Wait(0xc2089d8140, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
os/exec.(*Cmd).Run(0xc2089d8140, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
main.(*builder).runOut(0xc2080589a0, 0xc20830f620, 0x2a, 0xc2080f39d0, 0xa,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
main.gcToolchain.gc(0xc2080589a0, 0xc2085d6800, 0xc2086682c0, 0x34,
0xc208385840, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1590 +0xca0
main.gcToolchain.gc·i(0x0, 0xc2080589a0, 0xc2085d6800, 0xc2086682c0, 0x34,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1 +0x181
main.(*builder).build(0xc2080589a0, 0xc208564b60, 0x0, 0x0)
 /home/minux/build/go.hg/src/cmd/go/build.go:893 +0x2060
main.func·005(0xc208564b60)
/home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
main.func·006()
/home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
created by main.(*builder).do
 /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416

goroutine 23 [syscall]:
syscall.Syscall6(0x7, 0x8bb9, 0x800e051e4, 0x0, 0xc2089d6870, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
syscall.wait4(0x8bb9, 0x800e051e4, 0x0, 0xc2089d6870, 0x478212, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
syscall.Wait4(0x8bb9, 0x800e0522c, 0x0, 0xc2089d6870, 0xc208a69bd0, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
os.(*Process).wait(0xc2084c1140, 0x0, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
os.(*Process).Wait(0xc2084c1140, 0xc208a0c690, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
os/exec.(*Cmd).Wait(0xc2089d8640, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
os/exec.(*Cmd).Run(0xc2089d8640, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
main.(*builder).runOut(0xc2080589a0, 0xc2082355c0, 0x24, 0xc2080f3040, 0x4,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
main.gcToolchain.gc(0xc2080589a0, 0xc208479400, 0xc2082ed0b0, 0x28,
0xc2083f9800, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1590 +0xca0
main.gcToolchain.gc·i(0x0, 0xc2080589a0, 0xc208479400, 0xc2082ed0b0, 0x28,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1 +0x181
main.(*builder).build(0xc2080589a0, 0xc208536ea0, 0x0, 0x0)
 /home/minux/build/go.hg/src/cmd/go/build.go:893 +0x2060
main.func·005(0xc208536ea0)
/home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
main.func·006()
/home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
created by main.(*builder).do
 /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416

goroutine 24 [syscall]:
syscall.Syscall6(0x7, 0x8bbe, 0x800e0309c, 0x0, 0xc2089d6f30, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
syscall.wait4(0x8bbe, 0x800e0309c, 0x0, 0xc2089d6f30, 0x478212, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
syscall.Wait4(0x8bbe, 0x800e030e4, 0x0, 0xc2089d6f30, 0xc208a3e280, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
os.(*Process).wait(0xc2084be040, 0x0, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
os.(*Process).Wait(0xc2084be040, 0xc20888e320, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
os/exec.(*Cmd).Wait(0xc2089d8dc0, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
os/exec.(*Cmd).Run(0xc2089d8dc0, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
main.(*builder).runOut(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
main.(*builder).run(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1311 +0xe6
main.gcToolchain.ld(0xc2080589a0, 0xc2083a8c00, 0xc2082ecf60, 0x2e,
0xc2089afe00, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1759 +0x1005
main.gcToolchain.ld·i(0x0, 0xc2080589a0, 0xc2083a8c00, 0xc2082ecf60, 0x2e,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1 +0xe3
main.(*builder).build(0xc2080589a0, 0xc208134750, 0x0, 0x0)
 /home/minux/build/go.hg/src/cmd/go/build.go:985 +0x349c
main.func·005(0xc208134750)
/home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
main.func·006()
/home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
created by main.(*builder).do
 /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416

goroutine 25 [syscall]:
syscall.Syscall6(0x7, 0x8bbb, 0x800e0109c, 0x0, 0xc2089d6b40, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
syscall.wait4(0x8bbb, 0x800e0109c, 0x0, 0xc2089d6b40, 0x478212, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
syscall.Wait4(0x8bbb, 0x800e010e4, 0x0, 0xc2089d6b40, 0xc208a69ef0, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
os.(*Process).wait(0xc2084c1860, 0x0, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
os.(*Process).Wait(0xc2084c1860, 0xc20888e0a0, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
os/exec.(*Cmd).Wait(0xc2089d8b40, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
os/exec.(*Cmd).Run(0xc2089d8b40, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
main.(*builder).runOut(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
main.(*builder).run(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1311 +0xe6
main.gcToolchain.ld(0xc2080589a0, 0xc20867bc00, 0xc2084cbe80, 0x32,
0xc2089afb00, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1759 +0x1005
main.gcToolchain.ld·i(0x0, 0xc2080589a0, 0xc20867bc00, 0xc2084cbe80, 0x32,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1 +0xe3
main.(*builder).build(0xc2080589a0, 0xc2085651e0, 0x0, 0x0)
 /home/minux/build/go.hg/src/cmd/go/build.go:985 +0x349c
main.func·005(0xc2085651e0)
/home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
main.func·006()
/home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
created by main.(*builder).do
 /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416

goroutine 26 [syscall]:
syscall.Syscall6(0x7, 0x8bba, 0x800dff1e4, 0x0, 0xc2089d6e10, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
syscall.wait4(0x8bba, 0x800dff1e4, 0x0, 0xc2089d6e10, 0x478212, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
syscall.Wait4(0x8bba, 0x800dff22c, 0x0, 0xc2089d6e10, 0xc208a69db0, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
os.(*Process).wait(0xc2084c1d40, 0x0, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
os.(*Process).Wait(0xc2084c1d40, 0xc208b73860, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
os/exec.(*Cmd).Wait(0xc2089d88c0, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
os/exec.(*Cmd).Run(0xc2089d88c0, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
main.(*builder).runOut(0xc2080589a0, 0xc2081ed620, 0x2d, 0xc2080f3c40, 0xd,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
main.gcToolchain.gc(0xc2080589a0, 0xc208566800, 0xc20840f540, 0x3a,
0xc2082788c0, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1590 +0xca0
main.gcToolchain.gc·i(0x0, 0xc2080589a0, 0xc208566800, 0xc20840f540, 0x3a,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1 +0x181
main.(*builder).build(0xc2080589a0, 0xc2080c8b60, 0x0, 0x0)
 /home/minux/build/go.hg/src/cmd/go/build.go:893 +0x2060
main.func·005(0xc2080c8b60)
/home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
main.func·006()
/home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
created by main.(*builder).do
 /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416

goroutine 27 [syscall]:
syscall.Syscall6(0x7, 0x8bc3, 0x800dfd09c, 0x0, 0xc2089d6480, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
syscall.wait4(0x8bc3, 0x800dfd09c, 0x0, 0xc2089d6480, 0x478212, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
syscall.Wait4(0x8bc3, 0x800dfd0e4, 0x0, 0xc2089d6480, 0xc208a3e4b0, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
os.(*Process).wait(0xc2084bf840, 0x0, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
os.(*Process).Wait(0xc2084bf840, 0xc20888e000, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
os/exec.(*Cmd).Wait(0xc2089d8500, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
os/exec.(*Cmd).Run(0xc2089d8500, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
main.(*builder).runOut(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
main.(*builder).run(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1311 +0xe6
main.gcToolchain.ld(0xc2080589a0, 0xc208453c00, 0xc208668200, 0x33,
0xc2082d8a00, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1759 +0x1005
main.gcToolchain.ld·i(0x0, 0xc2080589a0, 0xc208453c00, 0xc208668200, 0x33,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1 +0xe3
main.(*builder).build(0xc2080589a0, 0xc20861c680, 0x0, 0x0)
 /home/minux/build/go.hg/src/cmd/go/build.go:985 +0x349c
main.func·005(0xc20861c680)
/home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
main.func·006()
/home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
created by main.(*builder).do
 /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416

goroutine 28 [syscall]:
syscall.Syscall6(0x7, 0x8bc4, 0x800dfb1e4, 0x0, 0xc2089d65a0, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
syscall.wait4(0x8bc4, 0x800dfb1e4, 0x0, 0xc2089d65a0, 0x478212, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
syscall.Wait4(0x8bc4, 0x800dfb22c, 0x0, 0xc2089d65a0, 0xc208a3ff90, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
os.(*Process).wait(0xc2084bf540, 0x0, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
os.(*Process).Wait(0xc2084bf540, 0xc2080c7d10, 0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
os/exec.(*Cmd).Wait(0xc2089d8f00, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
os/exec.(*Cmd).Run(0xc2089d8f00, 0x0, 0x0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
main.(*builder).runOut(0xc2080589a0, 0xc2081cc8d0, 0x25, 0xc2083cfe40, 0xa,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
main.gcToolchain.gc(0xc2080589a0, 0xc208612c00, 0xc2080f2510, 0x2f,
0xc2080f2390, ...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1590 +0xca0
main.gcToolchain.gc·i(0x0, 0xc2080589a0, 0xc208612c00, 0xc2080f2510, 0x2f,
...)
 /home/minux/build/go.hg/src/cmd/go/build.go:1 +0x181
main.(*builder).build(0xc2080589a0, 0xc2085055f0, 0x0, 0x0)
 /home/minux/build/go.hg/src/cmd/go/build.go:893 +0x2060
main.func·005(0xc2085055f0)
/home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
main.func·006()
/home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
created by main.(*builder).do
 /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416

goroutine 405 [syscall]:
syscall.Syscall(0x3, 0x5, 0xc2089c3e00, 0x200, 0x0, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
syscall.read(0x5, 0xc2089c3e00, 0x200, 0x200, 0x70dc61, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
+0x9c
syscall.Read(0x5, 0xc2089c3e00, 0x200, 0x200, 0x464f35, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
os.(*File).read(0xc20899c9d0, 0xc2089c3e00, 0x200, 0x200, 0x6fd380, ...)
/home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
os.(*File).Read(0xc20899c9d0, 0xc2089c3e00, 0x200, 0x200, 0x4b9cfa, ...)
/home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
bytes.(*Buffer).ReadFrom(0xc2089d2b60, 0x800db0ca8, 0xc20899c9d0, 0x0, 0x0,
...)
/home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
io.Copy(0x800e23338, 0xc2089d2b60, 0x800db0ca8, 0xc20899c9d0, 0x0, ...)
/home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
os/exec.func·003(0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
os/exec.func·004(0xc2084c0fc0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
created by os/exec.(*Cmd).Start
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb

goroutine 408 [syscall]:
syscall.Syscall(0x3, 0x3, 0xc20888c800, 0x200, 0x0, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
syscall.read(0x3, 0xc20888c800, 0x200, 0x200, 0x70dc61, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
+0x9c
syscall.Read(0x3, 0xc20888c800, 0x200, 0x200, 0x464f35, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
os.(*File).read(0xc20899cab0, 0xc20888c800, 0x200, 0x200, 0x6fd380, ...)
/home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
os.(*File).Read(0xc20899cab0, 0xc20888c800, 0x200, 0x200, 0x4b9cfa, ...)
/home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
bytes.(*Buffer).ReadFrom(0xc2089d2cb0, 0x800db0ca8, 0xc20899cab0, 0x0, 0x0,
...)
/home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
io.Copy(0x800e23338, 0xc2089d2cb0, 0x800db0ca8, 0xc20899cab0, 0x0, ...)
/home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
os/exec.func·003(0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
os/exec.func·004(0xc2084c18a0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
created by os/exec.(*Cmd).Start
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb

goroutine 411 [syscall]:
syscall.Syscall(0x3, 0x7, 0xc20888ce00, 0x200, 0x0, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
syscall.read(0x7, 0xc20888ce00, 0x200, 0x200, 0x70dc61, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
+0x9c
syscall.Read(0x7, 0xc20888ce00, 0x200, 0x200, 0x464f35, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
os.(*File).read(0xc20899cb48, 0xc20888ce00, 0x200, 0x200, 0x6fd380, ...)
/home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
os.(*File).Read(0xc20899cb48, 0xc20888ce00, 0x200, 0x200, 0x1, ...)
/home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
bytes.(*Buffer).ReadFrom(0xc2089d30a0, 0x800db0ca8, 0xc20899cb48, 0x0, 0x0,
...)
/home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
io.Copy(0x800e23338, 0xc2089d30a0, 0x800db0ca8, 0xc20899cb48, 0x0, ...)
/home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
os/exec.func·003(0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
os/exec.func·004(0xc2084c1ec0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
created by os/exec.(*Cmd).Start
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb

goroutine 407 [syscall]:
syscall.Syscall(0x3, 0x6, 0xc20888c400, 0x200, 0x0, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
syscall.read(0x6, 0xc20888c400, 0x200, 0x200, 0x70dc61, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
+0x9c
syscall.Read(0x6, 0xc20888c400, 0x200, 0x200, 0x464f35, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
os.(*File).read(0xc20899ca80, 0xc20888c400, 0x200, 0x200, 0x6fd380, ...)
/home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
os.(*File).Read(0xc20899ca80, 0xc20888c400, 0x200, 0x200, 0x1, ...)
/home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
bytes.(*Buffer).ReadFrom(0xc2089d2d90, 0x800db0ca8, 0xc20899ca80, 0x0, 0x0,
...)
/home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
io.Copy(0x800e23338, 0xc2089d2d90, 0x800db0ca8, 0xc20899ca80, 0x0, ...)
/home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
os/exec.func·003(0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
os/exec.func·004(0xc2084c16e0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
created by os/exec.(*Cmd).Start
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb

goroutine 418 [syscall]:
syscall.Syscall(0x3, 0xb, 0xc20832ae00, 0x200, 0x0, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
syscall.read(0xb, 0xc20832ae00, 0x200, 0x200, 0x70dc61, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
+0x9c
syscall.Read(0xb, 0xc20832ae00, 0x200, 0x200, 0x464f35, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
os.(*File).read(0xc20899c140, 0xc20832ae00, 0x200, 0x200, 0x6fd380, ...)
/home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
os.(*File).Read(0xc20899c140, 0xc20832ae00, 0x200, 0x200, 0x1, ...)
/home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
bytes.(*Buffer).ReadFrom(0xc2089d23f0, 0x800db0ca8, 0xc20899c140, 0x0, 0x0,
...)
/home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
io.Copy(0x800e23338, 0xc2089d23f0, 0x800db0ca8, 0xc20899c140, 0x0, ...)
/home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
os/exec.func·003(0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
os/exec.func·004(0xc2084bf6c0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
created by os/exec.(*Cmd).Start
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb

goroutine 51 [chan receive]:
main.func·028()
/home/minux/build/go.hg/src/cmd/go/signal.go:21 +0x3b
created by main.processSignals
 /home/minux/build/go.hg/src/cmd/go/signal.go:23 +0xc3

goroutine 410 [syscall]:
syscall.Syscall(0x3, 0x8, 0xc20888cc00, 0x200, 0x0, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
syscall.read(0x8, 0xc20888cc00, 0x200, 0x200, 0x70dc61, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
+0x9c
syscall.Read(0x8, 0xc20888cc00, 0x200, 0x200, 0x464f35, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
os.(*File).read(0xc20899ca20, 0xc20888cc00, 0x200, 0x200, 0x6fd380, ...)
/home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
os.(*File).Read(0xc20899ca20, 0xc20888cc00, 0x200, 0x200, 0x1, ...)
/home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
bytes.(*Buffer).ReadFrom(0xc2089d2c40, 0x800db0ca8, 0xc20899ca20, 0x0, 0x0,
...)
/home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
io.Copy(0x800e23338, 0xc2089d2c40, 0x800db0ca8, 0xc20899ca20, 0x0, ...)
/home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
os/exec.func·003(0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
os/exec.func·004(0xc2084c12c0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
created by os/exec.(*Cmd).Start
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb

goroutine 417 [syscall]:
syscall.Syscall(0x3, 0x9, 0xc20832ac00, 0x200, 0x0, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
syscall.read(0x9, 0xc20832ac00, 0x200, 0x200, 0x70dc61, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
+0x9c
syscall.Read(0x9, 0xc20832ac00, 0x200, 0x200, 0x464f35, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
os.(*File).read(0xc20899c100, 0xc20832ac00, 0x200, 0x200, 0x6fd380, ...)
/home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
os.(*File).Read(0xc20899c100, 0xc20832ac00, 0x200, 0x200, 0x1, ...)
/home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
bytes.(*Buffer).ReadFrom(0xc2089d2310, 0x800db0ca8, 0xc20899c100, 0x0, 0x0,
...)
/home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
io.Copy(0x800e23338, 0xc2089d2310, 0x800db0ca8, 0xc20899c100, 0x0, ...)
/home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
os/exec.func·003(0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
os/exec.func·004(0xc2084bf9c0)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
created by os/exec.(*Cmd).Start
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb

goroutine 415 [syscall]:
syscall.Syscall(0x3, 0xa, 0xc2083f4400, 0x200, 0x0, ...)
/home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
syscall.read(0xa, 0xc2083f4400, 0x200, 0x200, 0x70dc61, ...)
/home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
+0x9c
syscall.Read(0xa, 0xc2083f4400, 0x200, 0x200, 0x464f35, ...)
/home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
os.(*File).read(0xc20899c078, 0xc2083f4400, 0x200, 0x200, 0x6fd380, ...)
/home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
os.(*File).Read(0xc20899c078, 0xc2083f4400, 0x200, 0x200, 0x4b9cfa, ...)
/home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
bytes.(*Buffer).ReadFrom(0xc2089d2150, 0x800db0ca8, 0xc20899c078, 0x0, 0x0,
...)
/home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
io.Copy(0x800e23338, 0xc2089d2150, 0x800db0ca8, 0xc20899c078, 0x0, ...)
/home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
os/exec.func·003(0x0, 0x0)
/home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
os/exec.func·004(0xc2084bff80)
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
created by os/exec.(*Cmd).Start
 /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb

dvyukov

On Mon, Feb 24, 2014 at 12:12 PM, minux <minux.ma@gmail.com> wrote: > Unfortunately, this doesn't ...

10 years, 2 months ago (2014-02-24 08:19:48 UTC) #3

On Mon, Feb 24, 2014 at 12:12 PM, minux <minux.ma@gmail.com> wrote:
> Unfortunately, this doesn't fix the crash on DflyBSD during go test -v
> -short std,
> it could be reproduced 100% on that system:

Can you try to localize a small test that crashes most frequently
(e.g. 'foo.test -test.run=bar -test.cpu=x') and then try to reproduce
it on linux/darwin (preferably on linux)?
Do all tests crash randomly? Or only a subset of tests? What is
similar between that subset?
If it crashes only on DflyBSD, I would first suspect syscall package
and potential uintptr's in it.


> ok   go/format 0.015s
> ok   go/parser 0.068s
> panic: runtime error: invalid memory address or nil pointer dereference
> [signal 0xb code=0x1 addr=0x0 pc=0x8c27a0]
>
> goroutine 419 [running]:
> runtime.panic(0x7cd920, 0xce2ae8)
> /home/minux/build/go.hg/src/pkg/runtime/panic.c:250 +0xb4
> runtime: unexpected return pc for runtime.sigpanic called from 0x8c27a0
>
> goroutine 16 [semacquire]:
> sync.runtime_Semacquire(0xc20856df8c)
> /home/minux/build/go.hg/src/pkg/runtime/sema.goc:199 +0x30
> sync.(*WaitGroup).Wait(0xc208381b00)
> /home/minux/build/go.hg/src/pkg/sync/waitgroup.go:127 +0x15d
> main.(*builder).do(0xc2080589a0, 0xc20856bd40)
> /home/minux/build/go.hg/src/cmd/go/build.go:745 +0x440
> main.runTest(0xce1940, 0xc20800c020, 0x3, 0x3)
> /home/minux/build/go.hg/src/cmd/go/test.go:503 +0x22f9
> main.main()
> /home/minux/build/go.hg/src/cmd/go/main.go:161 +0x4fb
>
> goroutine 19 [syscall]:
> os/signal.loop()
> /home/minux/build/go.hg/src/pkg/os/signal/signal_unix.go:21 +0x1e
> created by os/signal.init·1
> /home/minux/build/go.hg/src/pkg/os/signal/signal_unix.go:27 +0x31
>
> goroutine 21 [syscall]:
> syscall.Syscall6(0x7, 0x8bbc, 0x800e0909c, 0x0, 0xc2089d6c60, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
> syscall.wait4(0x8bbc, 0x800e0909c, 0x0, 0xc2089d6c60, 0x478212, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
> syscall.Wait4(0x8bbc, 0x800e090e4, 0x0, 0xc2089d6c60, 0xc208a69f90, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
> os.(*Process).wait(0xc2084c1a20, 0x0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
> os.(*Process).Wait(0xc2084c1a20, 0xc208c43f40, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
> os/exec.(*Cmd).Wait(0xc2089d8a00, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
> os/exec.(*Cmd).Run(0xc2089d8a00, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
> main.(*builder).runOut(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
> main.(*builder).run(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1311 +0xe6
> main.gcToolchain.ld(0xc2080589a0, 0xc208612400, 0xc208484300, 0x34,
> 0xc20888c000, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1759 +0x1005
> main.gcToolchain.ld·i(0x0, 0xc2080589a0, 0xc208612400, 0xc208484300, 0x34,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1 +0xe3
> main.(*builder).build(0xc2080589a0, 0xc20856ba00, 0x0, 0x0)
> /home/minux/build/go.hg/src/cmd/go/build.go:985 +0x349c
> main.func·005(0xc20856ba00)
> /home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
> main.func·006()
> /home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
> created by main.(*builder).do
> /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416
>
> goroutine 22 [syscall]:
> syscall.Syscall6(0x7, 0x8bc1, 0x800e071e4, 0x0, 0xc2089d6240, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
> syscall.wait4(0x8bc1, 0x800e071e4, 0x0, 0xc2089d6240, 0x478212, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
> syscall.Wait4(0x8bc1, 0x800e0722c, 0x0, 0xc2089d6240, 0xc208a3e1e0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
> os.(*Process).wait(0xc2084bfe00, 0x0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
> os.(*Process).Wait(0xc2084bfe00, 0xc2080c7950, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
> os/exec.(*Cmd).Wait(0xc2089d8140, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
> os/exec.(*Cmd).Run(0xc2089d8140, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
> main.(*builder).runOut(0xc2080589a0, 0xc20830f620, 0x2a, 0xc2080f39d0, 0xa,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
> main.gcToolchain.gc(0xc2080589a0, 0xc2085d6800, 0xc2086682c0, 0x34,
> 0xc208385840, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1590 +0xca0
> main.gcToolchain.gc·i(0x0, 0xc2080589a0, 0xc2085d6800, 0xc2086682c0, 0x34,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1 +0x181
> main.(*builder).build(0xc2080589a0, 0xc208564b60, 0x0, 0x0)
> /home/minux/build/go.hg/src/cmd/go/build.go:893 +0x2060
> main.func·005(0xc208564b60)
> /home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
> main.func·006()
> /home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
> created by main.(*builder).do
> /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416
>
> goroutine 23 [syscall]:
> syscall.Syscall6(0x7, 0x8bb9, 0x800e051e4, 0x0, 0xc2089d6870, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
> syscall.wait4(0x8bb9, 0x800e051e4, 0x0, 0xc2089d6870, 0x478212, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
> syscall.Wait4(0x8bb9, 0x800e0522c, 0x0, 0xc2089d6870, 0xc208a69bd0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
> os.(*Process).wait(0xc2084c1140, 0x0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
> os.(*Process).Wait(0xc2084c1140, 0xc208a0c690, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
> os/exec.(*Cmd).Wait(0xc2089d8640, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
> os/exec.(*Cmd).Run(0xc2089d8640, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
> main.(*builder).runOut(0xc2080589a0, 0xc2082355c0, 0x24, 0xc2080f3040, 0x4,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
> main.gcToolchain.gc(0xc2080589a0, 0xc208479400, 0xc2082ed0b0, 0x28,
> 0xc2083f9800, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1590 +0xca0
> main.gcToolchain.gc·i(0x0, 0xc2080589a0, 0xc208479400, 0xc2082ed0b0, 0x28,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1 +0x181
> main.(*builder).build(0xc2080589a0, 0xc208536ea0, 0x0, 0x0)
> /home/minux/build/go.hg/src/cmd/go/build.go:893 +0x2060
> main.func·005(0xc208536ea0)
> /home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
> main.func·006()
> /home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
> created by main.(*builder).do
> /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416
>
> goroutine 24 [syscall]:
> syscall.Syscall6(0x7, 0x8bbe, 0x800e0309c, 0x0, 0xc2089d6f30, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
> syscall.wait4(0x8bbe, 0x800e0309c, 0x0, 0xc2089d6f30, 0x478212, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
> syscall.Wait4(0x8bbe, 0x800e030e4, 0x0, 0xc2089d6f30, 0xc208a3e280, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
> os.(*Process).wait(0xc2084be040, 0x0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
> os.(*Process).Wait(0xc2084be040, 0xc20888e320, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
> os/exec.(*Cmd).Wait(0xc2089d8dc0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
> os/exec.(*Cmd).Run(0xc2089d8dc0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
> main.(*builder).runOut(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
> main.(*builder).run(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1311 +0xe6
> main.gcToolchain.ld(0xc2080589a0, 0xc2083a8c00, 0xc2082ecf60, 0x2e,
> 0xc2089afe00, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1759 +0x1005
> main.gcToolchain.ld·i(0x0, 0xc2080589a0, 0xc2083a8c00, 0xc2082ecf60, 0x2e,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1 +0xe3
> main.(*builder).build(0xc2080589a0, 0xc208134750, 0x0, 0x0)
> /home/minux/build/go.hg/src/cmd/go/build.go:985 +0x349c
> main.func·005(0xc208134750)
> /home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
> main.func·006()
> /home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
> created by main.(*builder).do
> /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416
>
> goroutine 25 [syscall]:
> syscall.Syscall6(0x7, 0x8bbb, 0x800e0109c, 0x0, 0xc2089d6b40, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
> syscall.wait4(0x8bbb, 0x800e0109c, 0x0, 0xc2089d6b40, 0x478212, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
> syscall.Wait4(0x8bbb, 0x800e010e4, 0x0, 0xc2089d6b40, 0xc208a69ef0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
> os.(*Process).wait(0xc2084c1860, 0x0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
> os.(*Process).Wait(0xc2084c1860, 0xc20888e0a0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
> os/exec.(*Cmd).Wait(0xc2089d8b40, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
> os/exec.(*Cmd).Run(0xc2089d8b40, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
> main.(*builder).runOut(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
> main.(*builder).run(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1311 +0xe6
> main.gcToolchain.ld(0xc2080589a0, 0xc20867bc00, 0xc2084cbe80, 0x32,
> 0xc2089afb00, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1759 +0x1005
> main.gcToolchain.ld·i(0x0, 0xc2080589a0, 0xc20867bc00, 0xc2084cbe80, 0x32,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1 +0xe3
> main.(*builder).build(0xc2080589a0, 0xc2085651e0, 0x0, 0x0)
> /home/minux/build/go.hg/src/cmd/go/build.go:985 +0x349c
> main.func·005(0xc2085651e0)
> /home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
> main.func·006()
> /home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
> created by main.(*builder).do
> /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416
>
> goroutine 26 [syscall]:
> syscall.Syscall6(0x7, 0x8bba, 0x800dff1e4, 0x0, 0xc2089d6e10, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
> syscall.wait4(0x8bba, 0x800dff1e4, 0x0, 0xc2089d6e10, 0x478212, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
> syscall.Wait4(0x8bba, 0x800dff22c, 0x0, 0xc2089d6e10, 0xc208a69db0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
> os.(*Process).wait(0xc2084c1d40, 0x0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
> os.(*Process).Wait(0xc2084c1d40, 0xc208b73860, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
> os/exec.(*Cmd).Wait(0xc2089d88c0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
> os/exec.(*Cmd).Run(0xc2089d88c0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
> main.(*builder).runOut(0xc2080589a0, 0xc2081ed620, 0x2d, 0xc2080f3c40, 0xd,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
> main.gcToolchain.gc(0xc2080589a0, 0xc208566800, 0xc20840f540, 0x3a,
> 0xc2082788c0, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1590 +0xca0
> main.gcToolchain.gc·i(0x0, 0xc2080589a0, 0xc208566800, 0xc20840f540, 0x3a,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1 +0x181
> main.(*builder).build(0xc2080589a0, 0xc2080c8b60, 0x0, 0x0)
> /home/minux/build/go.hg/src/cmd/go/build.go:893 +0x2060
> main.func·005(0xc2080c8b60)
> /home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
> main.func·006()
> /home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
> created by main.(*builder).do
> /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416
>
> goroutine 27 [syscall]:
> syscall.Syscall6(0x7, 0x8bc3, 0x800dfd09c, 0x0, 0xc2089d6480, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
> syscall.wait4(0x8bc3, 0x800dfd09c, 0x0, 0xc2089d6480, 0x478212, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
> syscall.Wait4(0x8bc3, 0x800dfd0e4, 0x0, 0xc2089d6480, 0xc208a3e4b0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
> os.(*Process).wait(0xc2084bf840, 0x0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
> os.(*Process).Wait(0xc2084bf840, 0xc20888e000, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
> os/exec.(*Cmd).Wait(0xc2089d8500, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
> os/exec.(*Cmd).Run(0xc2089d8500, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
> main.(*builder).runOut(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
> main.(*builder).run(0xc2080589a0, 0x816d40, 0x1, 0x846750, 0x8, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1311 +0xe6
> main.gcToolchain.ld(0xc2080589a0, 0xc208453c00, 0xc208668200, 0x33,
> 0xc2082d8a00, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1759 +0x1005
> main.gcToolchain.ld·i(0x0, 0xc2080589a0, 0xc208453c00, 0xc208668200, 0x33,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1 +0xe3
> main.(*builder).build(0xc2080589a0, 0xc20861c680, 0x0, 0x0)
> /home/minux/build/go.hg/src/cmd/go/build.go:985 +0x349c
> main.func·005(0xc20861c680)
> /home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
> main.func·006()
> /home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
> created by main.(*builder).do
> /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416
>
> goroutine 28 [syscall]:
> syscall.Syscall6(0x7, 0x8bc4, 0x800dfb1e4, 0x0, 0xc2089d65a0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:41 +0x5
> syscall.wait4(0x8bc4, 0x800dfb1e4, 0x0, 0xc2089d65a0, 0x478212, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:32 +0x95
> syscall.Wait4(0x8bc4, 0x800dfb22c, 0x0, 0xc2089d65a0, 0xc208a3ff90, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_bsd.go:129 +0x76
> os.(*Process).wait(0xc2084bf540, 0x0, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec_unix.go:22 +0x121
> os.(*Process).Wait(0xc2084bf540, 0xc2080c7d10, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/doc.go:43 +0x39
> os/exec.(*Cmd).Wait(0xc2089d8f00, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:320 +0x1bd
> os/exec.(*Cmd).Run(0xc2089d8f00, 0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:237 +0x78
> main.(*builder).runOut(0xc2080589a0, 0xc2081cc8d0, 0x25, 0xc2083cfe40, 0xa,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1360 +0x298
> main.gcToolchain.gc(0xc2080589a0, 0xc208612c00, 0xc2080f2510, 0x2f,
> 0xc2080f2390, ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1590 +0xca0
> main.gcToolchain.gc·i(0x0, 0xc2080589a0, 0xc208612c00, 0xc2080f2510, 0x2f,
> ...)
> /home/minux/build/go.hg/src/cmd/go/build.go:1 +0x181
> main.(*builder).build(0xc2080589a0, 0xc2085055f0, 0x0, 0x0)
> /home/minux/build/go.hg/src/cmd/go/build.go:893 +0x2060
> main.func·005(0xc2085055f0)
> /home/minux/build/go.hg/src/cmd/go/build.go:679 +0x377
> main.func·006()
> /home/minux/build/go.hg/src/cmd/go/build.go:736 +0x134
> created by main.(*builder).do
> /home/minux/build/go.hg/src/cmd/go/build.go:742 +0x416
>
> goroutine 405 [syscall]:
> syscall.Syscall(0x3, 0x5, 0xc2089c3e00, 0x200, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
> syscall.read(0x5, 0xc2089c3e00, 0x200, 0x200, 0x70dc61, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
> +0x9c
> syscall.Read(0x5, 0xc2089c3e00, 0x200, 0x200, 0x464f35, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
> os.(*File).read(0xc20899c9d0, 0xc2089c3e00, 0x200, 0x200, 0x6fd380, ...)
> /home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
> os.(*File).Read(0xc20899c9d0, 0xc2089c3e00, 0x200, 0x200, 0x4b9cfa, ...)
> /home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
> bytes.(*Buffer).ReadFrom(0xc2089d2b60, 0x800db0ca8, 0xc20899c9d0, 0x0, 0x0,
> ...)
> /home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
> io.Copy(0x800e23338, 0xc2089d2b60, 0x800db0ca8, 0xc20899c9d0, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
> os/exec.func·003(0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
> os/exec.func·004(0xc2084c0fc0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
> created by os/exec.(*Cmd).Start
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb
>
> goroutine 408 [syscall]:
> syscall.Syscall(0x3, 0x3, 0xc20888c800, 0x200, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
> syscall.read(0x3, 0xc20888c800, 0x200, 0x200, 0x70dc61, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
> +0x9c
> syscall.Read(0x3, 0xc20888c800, 0x200, 0x200, 0x464f35, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
> os.(*File).read(0xc20899cab0, 0xc20888c800, 0x200, 0x200, 0x6fd380, ...)
> /home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
> os.(*File).Read(0xc20899cab0, 0xc20888c800, 0x200, 0x200, 0x4b9cfa, ...)
> /home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
> bytes.(*Buffer).ReadFrom(0xc2089d2cb0, 0x800db0ca8, 0xc20899cab0, 0x0, 0x0,
> ...)
> /home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
> io.Copy(0x800e23338, 0xc2089d2cb0, 0x800db0ca8, 0xc20899cab0, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
> os/exec.func·003(0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
> os/exec.func·004(0xc2084c18a0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
> created by os/exec.(*Cmd).Start
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb
>
> goroutine 411 [syscall]:
> syscall.Syscall(0x3, 0x7, 0xc20888ce00, 0x200, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
> syscall.read(0x7, 0xc20888ce00, 0x200, 0x200, 0x70dc61, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
> +0x9c
> syscall.Read(0x7, 0xc20888ce00, 0x200, 0x200, 0x464f35, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
> os.(*File).read(0xc20899cb48, 0xc20888ce00, 0x200, 0x200, 0x6fd380, ...)
> /home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
> os.(*File).Read(0xc20899cb48, 0xc20888ce00, 0x200, 0x200, 0x1, ...)
> /home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
> bytes.(*Buffer).ReadFrom(0xc2089d30a0, 0x800db0ca8, 0xc20899cb48, 0x0, 0x0,
> ...)
> /home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
> io.Copy(0x800e23338, 0xc2089d30a0, 0x800db0ca8, 0xc20899cb48, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
> os/exec.func·003(0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
> os/exec.func·004(0xc2084c1ec0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
> created by os/exec.(*Cmd).Start
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb
>
> goroutine 407 [syscall]:
> syscall.Syscall(0x3, 0x6, 0xc20888c400, 0x200, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
> syscall.read(0x6, 0xc20888c400, 0x200, 0x200, 0x70dc61, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
> +0x9c
> syscall.Read(0x6, 0xc20888c400, 0x200, 0x200, 0x464f35, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
> os.(*File).read(0xc20899ca80, 0xc20888c400, 0x200, 0x200, 0x6fd380, ...)
> /home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
> os.(*File).Read(0xc20899ca80, 0xc20888c400, 0x200, 0x200, 0x1, ...)
> /home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
> bytes.(*Buffer).ReadFrom(0xc2089d2d90, 0x800db0ca8, 0xc20899ca80, 0x0, 0x0,
> ...)
> /home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
> io.Copy(0x800e23338, 0xc2089d2d90, 0x800db0ca8, 0xc20899ca80, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
> os/exec.func·003(0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
> os/exec.func·004(0xc2084c16e0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
> created by os/exec.(*Cmd).Start
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb
>
> goroutine 418 [syscall]:
> syscall.Syscall(0x3, 0xb, 0xc20832ae00, 0x200, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
> syscall.read(0xb, 0xc20832ae00, 0x200, 0x200, 0x70dc61, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
> +0x9c
> syscall.Read(0xb, 0xc20832ae00, 0x200, 0x200, 0x464f35, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
> os.(*File).read(0xc20899c140, 0xc20832ae00, 0x200, 0x200, 0x6fd380, ...)
> /home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
> os.(*File).Read(0xc20899c140, 0xc20832ae00, 0x200, 0x200, 0x1, ...)
> /home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
> bytes.(*Buffer).ReadFrom(0xc2089d23f0, 0x800db0ca8, 0xc20899c140, 0x0, 0x0,
> ...)
> /home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
> io.Copy(0x800e23338, 0xc2089d23f0, 0x800db0ca8, 0xc20899c140, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
> os/exec.func·003(0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
> os/exec.func·004(0xc2084bf6c0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
> created by os/exec.(*Cmd).Start
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb
>
> goroutine 51 [chan receive]:
> main.func·028()
> /home/minux/build/go.hg/src/cmd/go/signal.go:21 +0x3b
> created by main.processSignals
> /home/minux/build/go.hg/src/cmd/go/signal.go:23 +0xc3
>
> goroutine 410 [syscall]:
> syscall.Syscall(0x3, 0x8, 0xc20888cc00, 0x200, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
> syscall.read(0x8, 0xc20888cc00, 0x200, 0x200, 0x70dc61, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
> +0x9c
> syscall.Read(0x8, 0xc20888cc00, 0x200, 0x200, 0x464f35, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
> os.(*File).read(0xc20899ca20, 0xc20888cc00, 0x200, 0x200, 0x6fd380, ...)
> /home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
> os.(*File).Read(0xc20899ca20, 0xc20888cc00, 0x200, 0x200, 0x1, ...)
> /home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
> bytes.(*Buffer).ReadFrom(0xc2089d2c40, 0x800db0ca8, 0xc20899ca20, 0x0, 0x0,
> ...)
> /home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
> io.Copy(0x800e23338, 0xc2089d2c40, 0x800db0ca8, 0xc20899ca20, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
> os/exec.func·003(0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
> os/exec.func·004(0xc2084c12c0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
> created by os/exec.(*Cmd).Start
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb
>
> goroutine 417 [syscall]:
> syscall.Syscall(0x3, 0x9, 0xc20832ac00, 0x200, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
> syscall.read(0x9, 0xc20832ac00, 0x200, 0x200, 0x70dc61, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
> +0x9c
> syscall.Read(0x9, 0xc20832ac00, 0x200, 0x200, 0x464f35, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
> os.(*File).read(0xc20899c100, 0xc20832ac00, 0x200, 0x200, 0x6fd380, ...)
> /home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
> os.(*File).Read(0xc20899c100, 0xc20832ac00, 0x200, 0x200, 0x1, ...)
> /home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
> bytes.(*Buffer).ReadFrom(0xc2089d2310, 0x800db0ca8, 0xc20899c100, 0x0, 0x0,
> ...)
> /home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
> io.Copy(0x800e23338, 0xc2089d2310, 0x800db0ca8, 0xc20899c100, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
> os/exec.func·003(0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
> os/exec.func·004(0xc2084bf9c0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
> created by os/exec.(*Cmd).Start
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb
>
> goroutine 415 [syscall]:
> syscall.Syscall(0x3, 0xa, 0xc2083f4400, 0x200, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/syscall/asm_dragonfly_amd64.s:18 +0x5
> syscall.read(0xa, 0xc2083f4400, 0x200, 0x200, 0x70dc61, ...)
> /home/minux/build/go.hg/src/pkg/syscall/zsyscall_dragonfly_amd64.go:890
> +0x9c
> syscall.Read(0xa, 0xc2083f4400, 0x200, 0x200, 0x464f35, ...)
> /home/minux/build/go.hg/src/pkg/syscall/syscall_unix.go:135 +0x6e
> os.(*File).read(0xc20899c078, 0xc2083f4400, 0x200, 0x200, 0x6fd380, ...)
> /home/minux/build/go.hg/src/pkg/os/file_unix.go:183 +0x74
> os.(*File).Read(0xc20899c078, 0xc2083f4400, 0x200, 0x200, 0x4b9cfa, ...)
> /home/minux/build/go.hg/src/pkg/os/file.go:95 +0xc2
> bytes.(*Buffer).ReadFrom(0xc2089d2150, 0x800db0ca8, 0xc20899c078, 0x0, 0x0,
> ...)
> /home/minux/build/go.hg/src/pkg/bytes/buffer.go:169 +0x22a
> io.Copy(0x800e23338, 0xc2089d2150, 0x800db0ca8, 0xc20899c078, 0x0, ...)
> /home/minux/build/go.hg/src/pkg/io/io.go:348 +0x153
> os/exec.func·003(0x0, 0x0)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:212 +0x86
> os/exec.func·004(0xc2084bff80)
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:284 +0x3e
> created by os/exec.(*Cmd).Start
> /home/minux/build/go.hg/src/pkg/os/exec/exec.go:285 +0x8eb
>

minux1

On Mon, Feb 24, 2014 at 3:19 AM, Dmitry Vyukov <dvyukov@google.com> wrote: > On Mon, ...

10 years, 2 months ago (2014-02-24 08:52:03 UTC) #4

On Mon, Feb 24, 2014 at 3:19 AM, Dmitry Vyukov <dvyukov@google.com> wrote:

> On Mon, Feb 24, 2014 at 12:12 PM, minux <minux.ma@gmail.com> wrote:
> > Unfortunately, this doesn't fix the crash on DflyBSD during go test -v
> > -short std,
> > it could be reproduced 100% on that system:
>
> Can you try to localize a small test that crashes most frequently
> (e.g. 'foo.test -test.run=bar -test.cpu=x') and then try to reproduce
>
note: it's cmd/go that's crashing.
go install -a -v std works fine, but during first few tests in go test
-short std,
it will crash like that.

GOTRACEBACK=2 shows that the nil dereference happens in a gc created
thread:
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x8c27a0]

goroutine 651 [running]:
runtime.panic(0x7cd920, 0xce2ae8)
/home/minux/build/go.hg/src/pkg/runtime/panic.c:250 +0xb4
runtime.panicstring(0xce2ae8)
/home/minux/build/go.hg/src/pkg/runtime/panic.c:482 +0xbd
runtime: unexpected return pc for runtime.sigpanic called from 0x8c27a0
runtime.sigpanic()
/home/minux/build/go.hg/src/pkg/runtime/os_dragonfly.c:185 +0xea
created by runtime.gc
/home/minux/build/go.hg/src/pkg/runtime/mgc0.c:2188
...
goroutine 18 [GC sweep wait]:
runtime.park(0x469490, 0xcf98b0, 0xce6669)
/home/minux/build/go.hg/src/pkg/runtime/proc.c:1364 +0x66
runtime.parkunlock(0xcf98b0, 0xce6669)
/home/minux/build/go.hg/src/pkg/runtime/proc.c:1380 +0x3b
bgsweep()
/home/minux/build/go.hg/src/pkg/runtime/mgc0.c:1917 +0xc2
runtime.goexit()
/home/minux/build/go.hg/src/pkg/runtime/proc.c:1438
created by runtime.gc
/home/minux/build/go.hg/src/pkg/runtime/mgc0.c:2188

I also observed crash in crypto/tls. Probably cgo related, if i disable cgo,
go test -short std could complete without crash. Do you have a clue?
(but is cmd/go using cgo during go test?)

The stack unwinder has some bug also. I will take a closer look, but not
until
at least Wednesday.

> it on linux/darwin (preferably on linux)?
> Do all tests crash randomly? Or only a subset of tests? What is
> similar between that subset?
> If it crashes only on DflyBSD, I would first suspect syscall package
> and potential uintptr's in it.

dvyukov

it seems to be bgsweep goroutine does it always crash in the same goroutine? what ...

10 years, 2 months ago (2014-02-24 08:59:50 UTC) #5

it seems to be bgsweep goroutine
does it always crash in the same goroutine?

what if you disable the following one by one?
ScanStackByFrames = 1,
IgnorePreciseGC = 0,
ConcurrentSweep = 1,

yes, unwinder would be useful, we need to know at least the line where
it crashes




On Mon, Feb 24, 2014 at 12:51 PM, minux <minux.ma@gmail.com> wrote:
>
> On Mon, Feb 24, 2014 at 3:19 AM, Dmitry Vyukov <dvyukov@google.com> wrote:
>>
>> On Mon, Feb 24, 2014 at 12:12 PM, minux <minux.ma@gmail.com> wrote:
>> > Unfortunately, this doesn't fix the crash on DflyBSD during go test -v
>> > -short std,
>> > it could be reproduced 100% on that system:
>>
>> Can you try to localize a small test that crashes most frequently
>> (e.g. 'foo.test -test.run=bar -test.cpu=x') and then try to reproduce
>
> note: it's cmd/go that's crashing.
> go install -a -v std works fine, but during first few tests in go test
> -short std,
> it will crash like that.
>
> GOTRACEBACK=2 shows that the nil dereference happens in a gc created
> thread:
> panic: runtime error: invalid memory address or nil pointer dereference
> [signal 0xb code=0x1 addr=0x0 pc=0x8c27a0]
>
> goroutine 651 [running]:
> runtime.panic(0x7cd920, 0xce2ae8)
> /home/minux/build/go.hg/src/pkg/runtime/panic.c:250 +0xb4
> runtime.panicstring(0xce2ae8)
> /home/minux/build/go.hg/src/pkg/runtime/panic.c:482 +0xbd
> runtime: unexpected return pc for runtime.sigpanic called from 0x8c27a0
> runtime.sigpanic()
> /home/minux/build/go.hg/src/pkg/runtime/os_dragonfly.c:185 +0xea
> created by runtime.gc
> /home/minux/build/go.hg/src/pkg/runtime/mgc0.c:2188
> ...
> goroutine 18 [GC sweep wait]:
> runtime.park(0x469490, 0xcf98b0, 0xce6669)
> /home/minux/build/go.hg/src/pkg/runtime/proc.c:1364 +0x66
> runtime.parkunlock(0xcf98b0, 0xce6669)
> /home/minux/build/go.hg/src/pkg/runtime/proc.c:1380 +0x3b
> bgsweep()
> /home/minux/build/go.hg/src/pkg/runtime/mgc0.c:1917 +0xc2
> runtime.goexit()
> /home/minux/build/go.hg/src/pkg/runtime/proc.c:1438
> created by runtime.gc
> /home/minux/build/go.hg/src/pkg/runtime/mgc0.c:2188
>
> I also observed crash in crypto/tls. Probably cgo related, if i disable cgo,
> go test -short std could complete without crash. Do you have a clue?
> (but is cmd/go using cgo during go test?)
>
> The stack unwinder has some bug also. I will take a closer look, but not
> until
> at least Wednesday.
>>
>> it on linux/darwin (preferably on linux)?
>> Do all tests crash randomly? Or only a subset of tests? What is
>> similar between that subset?
>> If it crashes only on DflyBSD, I would first suspect syscall package
>> and potential uintptr's in it.

minux1

On Mon, Feb 24, 2014 at 3:59 AM, Dmitry Vyukov <dvyukov@google.com> wrote: > it seems ...

10 years, 2 months ago (2014-02-24 09:13:38 UTC) #6

On Mon, Feb 24, 2014 at 3:59 AM, Dmitry Vyukov <dvyukov@google.com> wrote:

> it seems to be bgsweep goroutine
> does it always crash in the same goroutine?
>
I think so. The traceback always looks very similar.

>
> what if you disable the following one by one?
> ScanStackByFrames = 1,
> IgnorePreciseGC = 0,
> ConcurrentSweep = 1,
>
just disable scanstackbyframe, same.
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x8c1de0]

goroutine 108 [running]:
runtime.panic(0x7cd3a0, 0xce2a88)
/home/minux/build/go.hg/src/pkg/runtime/panic.c:250 +0xb4
runtime.panicstring(0xce2a88)
 /home/minux/build/go.hg/src/pkg/runtime/panic.c:482 +0xbd
runtime: unexpected return pc for runtime.sigpanic called from 0x8c1de0
runtime.sigpanic()
 /home/minux/build/go.hg/src/pkg/runtime/os_dragonfly.c:185 +0xea
created by runtime.gc
/home/minux/build/go.hg/src/pkg/runtime/mgc0.c:2188

just disable concurrentsweep, still same:
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x8c2600]

goroutine 189 [running]:
runtime.panic(0x7cd860, 0xce2ae8)
/home/minux/build/go.hg/src/pkg/runtime/panic.c:250 +0xb4
runtime.panicstring(0xce2ae8)
 /home/minux/build/go.hg/src/pkg/runtime/panic.c:482 +0xbd
runtime: unexpected return pc for runtime.sigpanic called from 0x8c2600
runtime.sigpanic()
 /home/minux/build/go.hg/src/pkg/runtime/os_dragonfly.c:185 +0xea
created by runtime.gc
/home/minux/build/go.hg/src/pkg/runtime/mgc0.c:2188

Disable both scanbyframe and concurrentsweep, same.
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x8c1c40]

goroutine 517 [running]:
runtime.panic(0x7cd2e0, 0xce2a88)
/home/minux/build/go.hg/src/pkg/runtime/panic.c:250 +0xb4
runtime.panicstring(0xce2a88)
 /home/minux/build/go.hg/src/pkg/runtime/panic.c:482 +0xbd
runtime: unexpected return pc for runtime.sigpanic called from 0x8c1c40
runtime.sigpanic()
 /home/minux/build/go.hg/src/pkg/runtime/os_dragonfly.c:185 +0xea
created by runtime.gc
/home/minux/build/go.hg/src/pkg/runtime/mgc0.c:2188

Disable all three, still persist.
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x8c1c60]

goroutine 556 [running]:
runtime.panic(0x7cd2e0, 0xce2a88)
/home/minux/build/go.hg/src/pkg/runtime/panic.c:250 +0xb4
runtime.panicstring(0xce2a88)
 /home/minux/build/go.hg/src/pkg/runtime/panic.c:482 +0xbd
runtime: unexpected return pc for runtime.sigpanic called from 0x8c1c60
runtime.sigpanic()
 /home/minux/build/go.hg/src/pkg/runtime/os_dragonfly.c:185 +0xea
created by runtime.gc
/home/minux/build/go.hg/src/pkg/runtime/mgc0.c:2188


I'm suspecting more and more on something cgo related, because go_bootstrap
could install -a -v std without crash, but go install -a -v std crashes
very early.

>
> yes, unwinder would be useful, we need to know at least the line where
> it crashes

rsc

LGTM but please fix the "fixes issue / update issue" appropriately to reflect minux's reports ...

10 years, 2 months ago (2014-02-24 15:01:53 UTC) #7

dvyukov

On 2014/02/24 15:01:53, rsc wrote: > LGTM but please fix the "fixes issue / update ...

10 years, 2 months ago (2014-02-24 15:13:12 UTC) #8

dvyukov

10 years, 2 months ago (2014-02-24 16:53:55 UTC) #10

*** Submitted as https://code.google.com/p/go/source/detail?r=1bbfa797b8ed ***

runtime: fix heap memory corruption
With concurrent sweeping finc if modified by runfinq and queuefinalizer
concurrently.
Fixes crashes like this one:
http://build.golang.org/log/6ad7b59ef2e93e3c9347eabfb4c4bd66df58fd5a
Fixes issue 7324.
Update issue 7396

LGTM=rsc
R=golang-codereviews, minux.ma, rsc
CC=golang-codereviews, khr
https://codereview.appspot.com/67980043

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