Re: [libreoffice-users] Re: Building libreoffice with clang on ppc64

On 22/10/2019 18:28, Piotr Kubaj wrote:
> Here's the backtrace. The process that segfaults is gengan.bin:
> #0  0x000000081baea134 in (anonymous namespace)::cpp_mediate(unsigned long, void**, void**, long, 
> long*)
>      (nOffsetAndIndex=60434681040, gpreg=0x3ffffffffffef830, fpreg=0x3ffffffffffef7c8, 
> sp=4611686018427320272, pRegisterReturn=0x3ffffffffffef7b8)
>      at bridges/source/cpp_uno/gcc3_linux_powerpc64/cpp2uno.cxx:396
> #1  0x000000081bae9f50 in privateSnippetExecutor() () at 
> bridges/source/cpp_uno/gcc3_linux_powerpc64/cpp2uno.cxx:563
> #2  0x00000008121de234 in cppu::throwException(com::sun::star::uno::Any const&)Python Exception <class 
> 'gdb.error'> No type named 挀漀洀⸀猀甀渀⸀猀琀愀爀⸀甀挀戀⸀䤀渀琀攀爀愀挀琀椀瘀攀
> 䄀甀最洀攀渀琀攀搀䤀伀䔀砀挀攀瀀琀椀漀渀.:
>   (exc=) at cppuhelper/source/exc_thrower.cxx:207
> #3  0x000000081672ebd4 in ucbhelper::cancelCommandExecution(com::sun::star::ucb::IOErrorCode, 
> com::sun::star::uno::Sequence<com::sun::star::uno::Any> const&, 
> com::sun::star::uno::Reference<com::sun::star::ucb::XCommandEnvironment> const&, rtl::OUString const&, 
> com::sun::star::uno::Reference<com::sun::star::ucb::XCommandProcessor> const&)
>      (eError=com::sun::star::ucb::IOErrorCode::IOErrorCode_NOT_EXISTING, rArgs=
>      uno::Sequence of length 2 = {...}, xEnv=empty uno::Reference, rMessage="an error occurred during 
> file opening", xContext=uno::Reference to (fileaccess::BaseContent *) 0x81d0b5258) at 
> ucbhelper/source/provider/cancelcommandexecution.cxx:109

So this smells like it is indeed related to the changes in your below 
patch.  (The code is about synthesizing a C++ `throw some_exception` 
expression, which may require synthesizing RTTI for the type of 
`some_exception` in RTTI::getRTTI in 
bridges/source/cpp_uno/gcc3_linux_powerpc64/except.cxx, which would need 
definitions of __cxxabiv1::__class_type_info and 
__cxxabiv1::__si_class_type_info.)  But hard to tell what exactly is 
going wrong without actually debugging it.

> On 19-10-21 21:38:29, Piotr Kubaj wrote:
> > I'm trying to build LibreOffice 6.3.2 on FreeBSD/powerpc64 with LLVM 9.0.0 (elfv2 ABI).
> >
> > My problem is that I'm getting those errors https://pastebin.com/dKAY28ns
> >
> > I tried to patch them with https://pastebin.com/66Xhi1D1 using similar code to x86-64. But then I'm 
> > getting a segfault at postcmd stage at the end of compilation.

I would assume that something about the definitions of 
__cxxabiv1::__class_type_info and __cxxabiv1::__si_class_type_info you 
added to bridges/source/cpp_uno/gcc3_linux_powerpc64/share.hxx does not 
match the definitions actually used by the system.

> > LibreOffice builds just fine with GCC 9.2, but this is still on elfv1. FreeBSD/powerpc* switches to 
> > LLVM for elfv2.

So where does such a GCC-based build find definitions of 
__cxxabiv1::__class_type_info and __cxxabiv1::__si_class_type_info (in 
some system header)?  How do those definitions differ from those you now 
added to bridges/source/cpp_uno/gcc3_linux_powerpc64/share.hxx?


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