[lldb-dev] Formatter for std::shared_ptr<std::wstring>
Enrico Granata
egranata at apple.com
Wed Aug 8 14:30:37 PDT 2012
If you are using GetPointeeData() it is a known bug in LLDB, which was resolved in r 161384
If that does not fix the issue, please do let us know with a reproduction case :-)
Enrico Granata
✉ egranata@.com
✆ (408) 972-7683
On Aug 8, 2012, at 2:27 PM, Alexander Angriawan <angriawan at hotmail.com> wrote:
> Attached.
> But this doesn't work with global variables and I haven't had chance to look at it.
>
>
> Subject: Re: [lldb-dev] Formatter for std::shared_ptr<std::wstring>
> From: egranata at apple.com
> Date: Wed, 8 Aug 2012 09:48:34 -0700
> CC: nino.kettlitz at googlemail.com; lldb-dev at cs.uiuc.edu
> To: angriawan at hotmail.com
>
> Alexander,
> feel free to share your script if you desire.
> I can work on integrating it into mainline LLDB.
>
> Thanks!
>
> Enrico Granata
> egranata@.com
> ✆ (408) 972-7683
>
> On Aug 7, 2012, at 8:41 PM, Alexander Angriawan <angriawan at hotmail.com> wrote:
>
> Hi,
>
> I got it working.
> I follow example from the following to navigate and Nino's script to read the char.
> http://llvm.org/svn/llvm-project/lldb/trunk/examples/synthetic/libcxx.py
>
> I can post the script if needed.
>
> thanks,
> PA
>
>
> Subject: Re: [lldb-dev] Formatter for std::shared_ptr<std::wstring>
> From: egranata at apple.com
> Date: Mon, 6 Aug 2012 11:54:51 -0700
> CC: angriawan at hotmail.com; lldb-dev at cs.uiuc.edu
> To: nino.kettlitz at googlemail.com
>
> Alexander is using libcpp, part of the LLVM project, whereas you are using libstdcpp (a GNU project).
> They both implement the C++ Standard Library but with different internals!
> Luckily they are easy to differentiate because libcpp classes lived in a std::__1 namespace
>
> Enrico Granata
> egranata@.com✆ (408) 972-7683
>
> On Aug 6, 2012, at 11:52 AM, Nino Kettlitz <nino.kettlitz at googlemail.com> wrote:
>
> Hi Alexander,
>
> your string implementation looks very complicated.
>
> Also the type of the string looks strange. I would expect that "std::wstring" is a typedef
> for "std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t>"
>
> You are using "std::__1::wstring" and the real type also contains this "__1" stuff
> "std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t>>"
> and it is additionally wrapped by a std::pair or sth similar.
>
> I've never seen this before. Maybe somebody else in the mailing list did?!
>
> So the wstring.py data formater works only for std::wstring with a "_M_dataplus" and a "_M_p" member
>
> Cheers,
> Nino
>
>
>
>
> Am 06.08.2012 19:47, schrieb Alexander Angriawan:
> I am using Mac OS X Version 10.7.4
> The following is the lldb output:
> (lldb) frame variable x
> (std::__1::wstring) x = {
> __r_ = {
> std::__1::__libcpp_compressed_pair_imp<std::__1::basic_string<wchar_t, std::__1::char_traits<wchar_t>, std::__1::allocator<wchar_t> >::__rep, std::__1::allocator<wchar_t> > = {
> __first_ = {
> = {
> __l = {
> __cap_ = 17
> __size_ = 12
> __data_ = 0x00000001001009c0
> }
> __s = {
> = {
> __size_ = '\x11'
> _ = \x11\0\0\0
> }
> __data_ = {
> [0] = \0\0\0\0
> [1] = \f\0\0\0
> [2] = \0\0\0\0
> [3] = \xc0\t\x10\0
> [4] = \x01\0\0\0
> }
> }
> __r = {
> __words = {
> [0] = 17
> [1] = 12
> [2] = 4296018368
> }
> }
> }
> }
> }
> }
> }
> (lldb)
>
> Thanks,
> PA
>
> Date: Mon, 6 Aug 2012 11:24:48 +0200
> From: nino.kettlitz at googlemail.com
> To: angriawan at hotmail.com
> Subject: Re: [lldb-dev] Formatter for std::shared_ptr<std::wstring>
>
> Hmm, thats strange.
>
> I'm currently using not the latest lldb, so maybe something changed.
>
> What platform are you developing on? The script is written for osx.
>
> Maybe you can just send me the output of "frame variable x" without having the script installed. Maybe the structure of your strings differ.
>
>
> N.
>
> Am 06.08.12 10:54, schrieb Alexander Angriawan:
> Thank you Nino.
>
> Unfortunately the script doesn't work in my environment.
> GetByteSize() always return 0 in my case.
>
> ....
> if _M_p_data.GetByteSize() == 1:
> _M_p_deref = _M_p_data.GetUnsignedInt8(e, 0) # utf-8
> elif _M_p_data.GetByteSize() == 2:
> _M_p_deref = _M_p_data.GetUnsignedInt16(e, 0) # utf-16
> elif _M_p_data.GetByteSize() == 4:
> _M_p_deref = _M_p_data.GetSignedInt32(e, 0) # utf-32
> else:
> _M_p_deref = -1
>
> if _M_p_deref <= 0:
> break
> ----
>
> My simple test code:
>
> int main(int argc, const char * argv[])
> {
> std::wstring x = L"fooo";
> return 0;
> }
>
> ---
> JA
>
>
>
>
>
> Date: Mon, 6 Aug 2012 09:54:09 +0200
> From: nino.kettlitz at googlemail.com
> To: angriawan at hotmail.com
> CC: lldb-dev at cs.uiuc.edu
> Subject: Re: [lldb-dev] Formatter for std::shared_ptr<std::wstring>
>
> Oh,
>
> I've seen, that the script attached to the mail is not on the server, so I attached it again, although it would be better to have it in the lldb svn.
>
> Yust copy the script to your hom directory and ad the folowing line to your .lldbinit
>
> script sys.path[:0] = [os.path.expanduser('~')]
> command alias pwd script print os.getcwd()
> script import wstring
> type summary add --python-function wstring.wstring_summary "std::wstring"
> type summary add --python-function wstring.wstring_summary "std::basic_string<int, class std::char_traits<int>, class std::allocator<int> >"
> type summary add --python-function wstring.wstring_summary "std::basic_string<unsigned short, class std::char_traits<unsigned short>, class std::allocator<unsigned short> >"
> type summary add --python-function wstring.wstring_summary "std::basic_string<wchar_t, class std::char_traits<wchar_t>, class std::allocator<wchar_t> >"
>
>
> Cheers, Nino
>
> Am 06.08.12 09:19, schrieb Alexander Angriawan:
> Hello,
>
> I am looking to write data formatter for std::shared_ptr<std::wstring>.
>
> I found the following old article but this doesn't seem to work.
> I have ver 159 installed.
> http://lists.cs.uiuc.edu/pipermail/lldb-dev/2012-February/000825.html
>
> Any idea?
>
> Thank you much,
> PA
>
>
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> <formatter.bin>
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