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

[Pavel Labath via lldb-dev]

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
>
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