On Tue, 13 Jul 2021 13:54:05 +0200 Jeremie Courreges-Anglas <j...@openbsd.org> wrote:
> On Tue, Jul 13 2021, Charlene Wendling <juliana...@posteo.jp> wrote: > > On Tue, 13 Jul 2021 01:51:28 +0200 > > Jeremie Courreges-Anglas <j...@openbsd.org> wrote: > > > >> On Mon, Jul 12 2021, Charlene Wendling <juliana...@posteo.jp> > >> wrote: > >> > Hi, > >> > > >> > This is the first bulk with base libexecinfo. > >> > > >> >> https://bin.charlenew.xyz/emacs_bulk_failure.log > >> > > >> > The last port commit brought libexecinfo support to emacs, and > >> > leads to segfault during the build on macppc. I attach the > >> > backtrace of a simple 'temacs' invocation, showing that it may > >> > not be emacs' fault. > >> > > >> > I can't fix the libexecinfo issue. > >> > > >> > But the build works fine with the below diff [0] [1] [2]. It > >> > reverts the latest commit on macppc, while leaving the other > >> > arches as it is currently. As such no REVISION bump is needed. > >> > > >> > Comments/feedback are welcome, > >> > >> ok jca@ for this diff but please amend the comment unless you're > >> sure the problem comes from Lisp code. AFAIK the emacs C code > >> calls backtrace() early. I'd suggest > >> > >> # backtrace() crashes at build time on powerpc > > > > I'm not sure, so i'll change the comment. > > > >> I'm slightly worried regarding libunwind status on powerpc. What > >> does regress/gnu/lib/libexecinfo say? > > > > This cannot be run on macppc: > > > > -->8-- > > ==== run-regress-skiparch ==== > > # No unwind info on this arch > > SKIPPED > > --8<-- > > > > It's limited to amd64 or llvm>=12, as mentioned in the regress' > > Makefile cvs log. > > Well could you please test with the diff below applied? > > > Index: Makefile > =================================================================== > RCS file: /d/cvs/src/regress/gnu/lib/libexecinfo/Makefile,v > retrieving revision 1.2 > diff -u -p -r1.2 Makefile > --- Makefile 18 Jun 2021 14:09:31 -0000 1.2 > +++ Makefile 13 Jul 2021 11:49:56 -0000 > @@ -6,7 +6,7 @@ > > # Only amd64 has unwind info by default in llvm11. llvm12 adds more > # arches. > CLANG_VERSION!=clang --version | head -1 | grep -E -o 'version > [[:digit:]]+' | cut -d' ' -f 2 -CLANG_GE_12!=if [ ${CLANG_VERSION} > -ge 12 ] ; then echo 1 ; fi +CLANG_GE_12!=if [ ${CLANG_VERSION} -ge > 11 ] ; then echo 1 ; fi .if ${MACHINE} == "amd64" || ${CLANG_GE_12} > == "1" > PROG= t_backtrace > > -- > jca | PGP : 0x1524E7EE / 5135 92C1 AD36 5293 2BDF DDCC 0DFA 74AE > 1524 E7EE > Here you are. I did the same thing this morning but i wasn't very sure if it was valid. If i pass DEBUG="-O0 -g" to the Makefile, it does not segfault by the way. (gdb) run Starting program: /usr/src/regress/gnu/lib/libexecinfo/t_backtrace -r 1 Program received signal SIGSEGV, Segmentation fault. libunwind::CFI_Parser<libunwind::LocalAddressSpace>::findFDE (addressSpace=..., pc=3122944028, ehSectionStart=3123060828, sectionLength=<optimized out>, fdeHint=<optimized out>, fdeInfo=0xfffcbce8, cieInfo=0xfffcbcc8) at /usr/src/gnu/llvm/libunwind/src/DwarfParser.hpp:223 223 pint_t cfiLength = addressSpace.get32(p); (gdb) bt #0 libunwind::CFI_Parser<libunwind::LocalAddressSpace>::findFDE (addressSpace=..., pc=3122944028, ehSectionStart=3123060828, sectionLength=<optimized out>, fdeHint=<optimized out>, fdeInfo=0xfffcbce8, cieInfo=0xfffcbcc8) at /usr/src/gnu/llvm/libunwind/src/DwarfParser.hpp:223 #1 0xba24cfd0 in libunwind::UnwindCursor<libunwind::LocalAddressSpace, libunwind::Registers_ppc>::getInfoFromDwarfSection (this=0xfffcc920, pc=3122944028, sects=..., fdeSectionOffsetHint=0) at /usr/src/gnu/llvm/libunwind/src/UnwindCursor.hpp:1518 #2 0xba249ce4 in libunwind::UnwindCursor<libunwind::LocalAddressSpace, libunwind::Registers_ppc>::setInfoBasedOnIPRegister (this=0xfffcc920, isReturnAddress=<optimized out>) at /usr/src/gnu/llvm/libunwind/src/UnwindCursor.hpp:1927 #3 0xba2480a8 in __unw_init_local (cursor=0xfffcc920, context=0xfffcc578) at /usr/src/gnu/llvm/libunwind/src/libunwind.cpp:76 #4 0xba24582c in _Unwind_Backtrace (callback=0xba24ec54 <tracer>, ref=0xfffccd28) at /usr/src/gnu/llvm/libunwind/src/UnwindLevel1-gcc-ext.c:112 #5 0xba24ebd4 in backtrace (arr=<optimized out>, len=<optimized out>) at /usr/src/gnu/lib/libexecinfo/unwind.c:69 #6 0x2d1e070c in myfunc3 ()
