On Mon, Nov 11, 2013 at 8:52 PM, Ian Lance Taylor <i...@google.com> wrote: > On Fri, Nov 8, 2013 at 1:10 AM, Uros Bizjak <ubiz...@gmail.com> wrote: >> >> panic: runtime error: invalid memory address or nil pointer dereference >> [signal 0xb code=0x1 addr=0x1c]
>> FAIL: runtime/pprof >> gmake[2]: *** [runtime/pprof/check] Error 1 >> >> This one is new, I have to look into it a bit deeper. > > > I don't know what is happening here. I can't recreate it. There was > a different problem that could arise in runtime/pprof, that was fixed > by a patch I submitted on Saturday > (http://gcc.gnu.org/ml/gcc-patches/2013-11/msg01016.html). So it's > possible that this is fixed now. The failure is specific to !USING_SPLIT_STACK targets: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x200009e9280 (LWP 21478)] 0x000000012001e854 in syscall.Exitsyscall () at ../../../gcc-svn/trunk/libgo/runtime/proc.c:1986 1986 m->p->syscalltick++; (gdb) list 1981 #ifdef USING_SPLIT_STACK 1982 gp->gcstack = nil; 1983 #endif 1984 gp->gcnext_sp = nil; 1985 runtime_memclr(&gp->gcregs, sizeof gp->gcregs); 1986 m->p->syscalltick++; 1987 } 1988 1989 static bool 1990 exitsyscallfast(void) (gdb) p m $2 = <optimized out> The crash is at line 1986, but it is unclear if m or p are null. > If you are able to recreate it, try setting GOTRACEBACK=2 in the > environment. That will provide more information in the backtrace. Following is full traceback: panic: runtime error: invalid memory address or nil pointer dereference [signal 0xb code=0x1 addr=0x1c] goroutine 10 [running]: runtime_dopanic ../../../gcc-svn/trunk/libgo/runtime/panic.c:77 __go_panic ../../../gcc-svn/trunk/libgo/runtime/go-panic.c:113 runtime_panicstring ../../../gcc-svn/trunk/libgo/runtime/panic.c:134 sig_panic_info_handler ../../../gcc-svn/trunk/libgo/runtime/go-signal.c:291 :0 syscall.Exitsyscall ../../../gcc-svn/trunk/libgo/runtime/proc.c:1986 runtime_notetsleepg ../../../gcc-svn/trunk/libgo/runtime/lock_futex.c:190 getprofile ../../../gcc-svn/trunk/libgo/runtime/cpuprof.c:370 runtime.CPUProfile ../../../gcc-svn/trunk/libgo/runtime/cpuprof.c:446 pprof.profileWriter /home/uros/gcc-build/alphaev68-unknown-linux-gnu/libgo/gotest21332/test/pprof.go:600 kickoff ../../../gcc-svn/trunk/libgo/runtime/proc.c:229 :0 :0 created by runtime_pprof.StartCPUProfile /home/uros/gcc-build/alphaev68-unknown-linux-gnu/libgo/gotest21332/test/pprof.go:594 goroutine 1 [chan receive]: runtime_mcall ../../../gcc-svn/trunk/libgo/runtime/proc.c:292 runtime_chanrecv ../../../gcc-svn/trunk/libgo/runtime/chan.c:378 testing.RunTests ../../../gcc-svn/trunk/libgo/go/testing/testing.go:470 testing.Main ../../../gcc-svn/trunk/libgo/go/testing/testing.go:401 main.main /home/uros/gcc-build/alphaev68-unknown-linux-gnu/libgo/gotest21332/test/_testmain.go:34 runtime_main ../../../gcc-svn/trunk/libgo/runtime/proc.c:560 kickoff ../../../gcc-svn/trunk/libgo/runtime/proc.c:229 :0 :0 goroutine 2 [syscall]: goroutine in C code; stack unavailable created by runtime_main ../../../gcc-svn/trunk/libgo/runtime/proc.c:547 goroutine 8 [chan receive]: runtime_mcall ../../../gcc-svn/trunk/libgo/runtime/proc.c:292 runtime_chanrecv ../../../gcc-svn/trunk/libgo/runtime/chan.c:378 __go_receive_small ../../../gcc-svn/trunk/libgo/runtime/chan.c:503 runtime_pprof.StopCPUProfile /home/uros/gcc-build/alphaev68-unknown-linux-gnu/libgo/gotest21332/test/pprof.go:621 __go_undefer ../../../gcc-svn/trunk/libgo/runtime/go-defer.c:52 runtime_pprof_test.TestCPUProfileWithFork /home/uros/gcc-build/alphaev68-unknown-linux-gnu/libgo/gotest21332/test/pprof_test.go:181 testing.tRunner ../../../gcc-svn/trunk/libgo/go/testing/testing.go:389 kickoff ../../../gcc-svn/trunk/libgo/runtime/proc.c:229 :0 :0 created by testing.RunTests ../../../gcc-svn/trunk/libgo/go/testing/testing.go:469 Uros.
