[cfe-dev] Need to debug creation of vtables: where is an enter point

[Evgeny Astigeevich]

Hi all,

 

I need to debug creation of vtables. I tried to setup break points at
different places of CGVTT.cpp, CGCXXABI.h, CGVTables.cpp, ItaniumCXXABI.cpp,
but gdb did not stop at them. 

I have:

 

clang -cc1 version 3.6.0 based upon LLVM 3.6.0svn default target
x86_64-unknown-linux-gnu

Its run options:

-cc1 -triple x86_64-unknown-linux-gnu -emit-obj -mrelax-all -disable-free
-main-file-name test.cpp -mrelocation-model static -mthread-model posix
-mdisable-fp-elim -fmath-errno -masm-verbose -mconstructor-aliases
-munwind-tables -target-cpu x86-64 -v -dwarf-column-info -coverage-file
test.cpp -resource-dir
/linux-x86_64-high/gcc_4.7.2/dbg/llvm/bin/../lib/clang/3.6.0
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6
-internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/x86_64-linux-g
nu -internal-isystem
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../include/c++/4.6/backward
-internal-isystem /usr/local/include -internal-isystem
/work/oss_llvm/trunk/work/build/linux-x86_64-high/gcc_4.7.2/dbg/llvm/bin/../
lib/clang/3.6.0/include -internal-externc-isystem
/usr/include/x86_64-linux-gnu -internal-externc-isystem /include
-internal-externc-isystem /usr/include -O0 -fdeprecated-macro  -ferror-limit
19 -fmessage-length 205 -mstackrealign -fobjc-runtime=gcc -fcxx-exceptions
-fexceptions -fdiagnostics-show-option -o test.o -x c++ test.cpp

 

In a created object file I see the following:

 

_ZTVN10__cxxabiv117__class_type_infoE

 

I found that it is defined in ItaniumCXXABI.cpp:
"_ZTVN10__cxxabiv117__class_type_infoE", function
ItaniumRTTIBuilder::BuildVTablePointer, but gdb did not stop there.

 

Kind regards,

Evgeny
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/cfe-dev/attachments/20141015/9983dfd4/attachment.html>