[lldb-dev] lldb doesn't work on centos7

[陶征霖 via lldb-dev]

Make sense. Thanks.

2015-12-05 3:20 GMT+08:00 Greg Clayton <gclayton at apple.com>:

> Yes the debug info does get bigger. But this is better than having the
> compiler omit the "std::string" definition so that you can't view stuff
> from the STL.
>
> Greg
>
> > On Nov 24, 2015, at 7:22 PM, 陶征霖 via lldb-dev <lldb-dev at lists.llvm.org>
> wrote:
> >
> > Also I found that the size of my program binary increases from 140M to
> 180M after -fno-limit-debug-info is added. Seems a lot of debug info is
> added?
> >
> > 2015-11-25 10:24 GMT+08:00 陶征霖 <zhenglin.taozl at gmail.com>:
> > Hi Pavel,
> >
> > Thanks for your reply. Seems lldb not finding the variable in the first
> place.
> >
> > * thread #1: tid = 154, 0x0000000000400e5e a.out`main + 94 at t.cpp:5,
> name = 'a.out', stop reason = breakpoint 1.1
> >     frame #0: 0x0000000000400e5e a.out`main + 94 at t.cpp:5
> >    2       using namespace std;
> >    3       int main() {
> >    4          string s = "aa";
> > -> 5          cout << s;
> >    6       }
> > (lldb) frame variable --raw-output s
> > (std::__1::string) s = {}
> >
> > I added -fno-limit-debug-info in my test, and it works now. But why?
> >
> > Thanks,
> > Zhenglin
> >
> >
> >
> > 2015-11-24 19:21 GMT+08:00 Pavel Labath <labath at google.com>:
> > HI,
> >
> > a couple of random shots in the dark:
> >
> > - could you paste the output of "frame variable --raw-output s"? (This
> > disables lldb's type formatters. The goal is to see if the problem is
> > in the formatter, or in lldb not finding the variable in the first
> > place).
> >
> > - could you compile your test executable with -fno-limit-debug-info
> > and see if that helps?
> >
> > pl
> >
> >
> > On 23 November 2015 at 02:15, 陶征霖 via lldb-dev <lldb-dev at lists.llvm.org>
> wrote:
> > >
> > > ---------- Forwarded message ----------
> > > From: 陶征霖 <zhenglin.taozl at gmail.com>
> > > Date: 2015-11-20 23:10 GMT+08:00
> > > Subject: lldb doesn't work on centos7
> > > To: llvm-dev at lists.llvm.org
> > >
> > >
> > > Hi,
> > >
> > > I build llvm+clang+lldb 3.7.0 from source code on centos7, the build
> command
> > > is "cmake -DCMAKE_BUILD_TYPE=Release
> > > -DCMAKE_INSTALL_PREFIX=${INSTALL_PREFIX} -DLLVM_LIBDIR_SUFFIX=64",
> there is
> > > no error during building process.
> > >
> > > And then I compile following c++ code using command "clang++ -std=c++11
> > > -stdlib=libc++ -lc++abi -g t.cpp":
> > > // t.cpp
> > > #include <iostream>
> > > using namespace std;
> > > int main() {
> > >    string s = "aa";
> > >    cout << s;
> > > }
> > > Try lldb to debug a.out, found that I can't print string s which shows
> > > empty:
> > > lldb a.out
> > > (lldb) target create "a.out"
> > > Current executable set to 'a.out' (x86_64).
> > > (lldb) l
> > >    4    int main() {
> > >    5       string s = "aa";
> > >    6       cout << s;
> > >    7    }
> > > (lldb) b 6
> > > Breakpoint 1: where = a.out`main + 94 at t.cpp:6, address =
> > > 0x0000000000400e5e
> > > (lldb) r
> > > Process 150 launched: '/root/a.out' (x86_64)
> > > Process 150 stopped
> > > * thread #1: tid = 150, 0x0000000000400e5e a.out`main + 94 at t.cpp:6,
> name
> > > = 'a.out', stop reason = breakpoint 1.1
> > >     frame #0: 0x0000000000400e5e a.out`main + 94 at t.cpp:6
> > >    3    using namespace std;
> > >    4    int main() {
> > >    5       string s = "aa";
> > > -> 6       cout << s;
> > >    7    }
> > > (lldb) p s
> > > (std::__1::string) $0 = {}
> > >
> > > Could you please help point out what's wrong in my env? Thanks.
> > >
> > > Thanks,
> > > Zhenglin
> > >
> > > _______________________________________________
> > > lldb-dev mailing list
> > > lldb-dev at lists.llvm.org
> > > http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
> > >
> > _______________________________________________
> > lldb-dev mailing list
> > lldb-dev at lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
>
>


-- 
陶征霖
Pivotal
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/lldb-dev/attachments/20151221/f6d48024/attachment.html>