On Apr 28 09:42, Ken Brown wrote: > On 4/27/2022 10:13 AM, Takashi Yano wrote: > > On Fri, 1 Apr 2022 17:45:51 +0900 > > Takashi Yano wrote: > > > I have tried to reproduce the issue by building OpenJDK > > > from source, however, I could not. > > > > > > Instead, I encountered another issue. > > > > > > Building OpenJDK sometimes (rarely) failed with error such as: > > > > > > 0 [sig] make 5484 sig_send: error sending signal 11, pid 5484, > > > pipe handle 0x118, nb 0, packsize 176, Win32 error 0 > > > 124917 [main] make 5484 sig_send: error sending signal -72, pid 5484, > > > pipe handle 0x118, nb 0, packsize 176, Win32 error 0 > > > common/modules/GensrcModuleInfo.gmk:77: *** open: > > > /home/yano/jdk/build/windows-x86-server-release/make-support/vardeps/make/common/modules/GensrcModuleInfo.gmk/jdk.accessibility/ALL_MODULES.vardeps: > > > No such file or directory. Stop. > > > make[2]: *** [make/Main.gmk:141: jdk.accessibility-gensrc-moduleinfo] > > > Error 2 > > > make[2]: *** Waiting for unfinished jobs.... > > > > > > > > > I looked into this new problem and found that wait_sig() thread > > > crashes with segfault. It seems that accessing _main_tls causes > > > access violation if a signal is sent just after the process is > > > started. > > > > > > static void WINAPI > > > wait_sig (VOID *) > > > { > > > [...] > > > if (!pack.mask) > > > { > > > tl_entry = cygheap->find_tls (_main_tls); > > > dummy_mask = _main_tls->sigmask; // <--- Segfault here > > > cygheap->unlock_tls (tl_entry); > > > pack.mask = &dummy_mask; > > > } > > > > > > I also found the following patch resolves the issue. > > > > > > diff --git a/winsup/cygwin/sigproc.cc b/winsup/cygwin/sigproc.cc > > > index 62df96652..3824af199 100644 > > > --- a/winsup/cygwin/sigproc.cc > > > +++ b/winsup/cygwin/sigproc.cc > > > @@ -1325,6 +1325,10 @@ wait_sig (VOID *) > > > _sig_tls = &_my_tls; > > > bool sig_held = false; > > > + /* Wait for _main_tls initialization. */ > > > + while (!cygwin_finished_initializing) > > > + Sleep (10); > > > + > > > sigproc_printf ("entering ReadFile loop, my_readsig %p, my_sendsig > > > %p", > > > my_readsig, my_sendsig); > > > > > > I guess _main_tls may not be initialized correctly until > > > cygwin_finished_initializing is set. > > > > > > Any comments would be appreciated. > > This seems reasonable to me.
Missed that, sorry. I agree this seems reasonable, but wouldn't it be cleaner if we *start* wait_sig only after cygwin_finished_initializing is set to true? Corinna -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple