On Thu, Oct 08, 2015 at 05:43:11AM -0700, Carlin Bingham wrote:
> Doesn't seem to happen if the main program thread is still running when
> the thread exits.
>
>
> use v6;
>
> Thread.start({
> my $fh = open('/dev/urandom');
> say $fh.read(16);
> say "alive";
> });
>
> say "main program ending";
ASAN suggests that it's a "regular" SEGV - ie there are no bad memory accesses
leading up to the crash:
$ ./perl6-m -Ilib 126297
main program ending
Buf[uint8]:0x<76 35 16 81 97 9f 8c 3f 77 f7 d4 02 00 ff bb 47>
alive
ASAN:SIGSEGV
=================================================================
==17783==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x7fc605dfa929 sp 0x7fff1a3952e0 bp 0x7fff1a395310 T0)
#0 0x7fc605dfa928 in MVM_gc_root_add_temps_to_worklist src/gc/roots.c:171
#1 0x7fc605dff068 in MVM_gc_collect src/gc/collect.c:103
#2 0x7fc605df36fa in run_gc src/gc/orchestrate.c:292
#3 0x7fc605df404f in MVM_gc_enter_from_allocator src/gc/orchestrate.c:427
#4 0x7fc605da9ab7 in try_join src/core/threads.c:156
#5 0x7fc605daa136 in MVM_thread_join_foreground src/core/threads.c:243
#6 0x7fc605fd01e9 in MVM_vm_exit src/moar.c:263
#7 0x401a82 in main src/main.c:198
#8 0x7fc605563d5c in __libc_start_main (/lib64/libc.so.6+0x1ed5c)
#9 0x401058 (/home/nicholas/Sandpit/moar-san/bin/moar+0x401058)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV src/gc/roots.c:171
MVM_gc_root_add_temps_to_worklist
==17783==ABORTING
Nicholas Clark
