This is the mail archive of the cygwin-patches mailing list for the Cygwin project.
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
Other format: | [Raw text] |
On Oct 9 18:15, Michael Haubenwallner wrote: > Hi, > > for the records: The (random) situation leading to attached patch: > > Reproducibly encountered the binutils-nm process falling into an > endless loop during some build process - but the reproducibility > depended on the length and/or the number of elements in the PATH > environment variable. Attaching with gdb shows endless wait for > tls::stacklock in _sigbe. More debugging outlines that nm first > received the expected SIGPIPE, but subsequently received SIGSEGV > while in the RtlLookupFunctionEntry windows function, causing no > signal handler to be finally executed, but returning to _sigbe. > > The command in question (with longer PATH environment variable) was: > $ x86_64-pc-cygwin-nm -f posix -A /lib/libcygwin.a | sed 1q > It was important to locate nm via PATH, not with /path/to/nm. > > Thanks! > /haubi/ > >From b029e683e2a03879c3c1cee06bf6cd2af86b67d9 Mon Sep 17 00:00:00 2001 > From: Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com> > Date: Mon, 9 Oct 2017 17:37:40 +0200 > Subject: [PATCH] cygwin: initialize variable for stack unwinding > > The third argument of RtlLookupFunctionEntry actually is documented as > _Inout_opt_ for both x64 and ARM, although generic doc says _Out_ only. > > * exceptions.cc (__unwind_single_frame): Initialize hist variable. > --- > winsup/cygwin/exceptions.cc | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc > index 743c73200..a3ee5cf71 100644 > --- a/winsup/cygwin/exceptions.cc > +++ b/winsup/cygwin/exceptions.cc > @@ -280,7 +280,7 @@ __unwind_single_frame (PCONTEXT ctx) > { > PRUNTIME_FUNCTION f; > ULONG64 imagebase; > - UNWIND_HISTORY_TABLE hist; > + UNWIND_HISTORY_TABLE hist = {0}; > DWORD64 establisher; > PVOID hdl; > > -- > 2.14.2 > Pushed. Thanks, Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat
Attachment:
signature.asc
Description: PGP signature
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |