[lldb-dev] Using LLDB API Segment Fault

[Song Ziming]

I figured out myself, just add `SBDebugger::Initialize()` at the first 
line of main function.

Besides, the code in Qt Creator and in command line actually behaved the 
same. But Qt Creator redirected the segment fault message to another 
window so I didn't noticed.

On 11/10/2014 04:36 AM, Song Ziming wrote:
> Hi everyone, I want to build a debugger frontend making use of LLDB's 
> API (on ubuntu linux 64bit). Since there's not enough 
> document/tutorial on using LLDB API, I turned to the "Python 
> reference" and made a little program:
>
> ```
> #include <iostream>
> #include <lldb/API/LLDB.h>
> #include <lldb/API/SBDebugger.h>
> #include <lldb/API/SBTarget.h>
> using namespace std;
> using namespace lldb;
>
> int main() {
>     cout << "Hello LLDB!" << endl;
>     SBDebugger debugger = SBDebugger::Create();
>     debugger.SetAsync(false);
>     SBTarget target = 
> debugger.CreateTargetWithFileAndArch("/home/szm/target", 
> LLDB_ARCH_DEFAULT);
>     return 0;
> }
> ```
>
> I compile and link the program using command: g++ -std=c++0x -o 
> lldbwrapper lldbwrapper.cpp -I /usr/lib/llvm-3.5/include -llldb. It 
> compiled without error, but when I run the program it printed "Helo, 
> LLDB!" and then printed "Segment fault".
>
> What's more, if I use the same code in Qt Creator with a plain c++ 
> project (using qmake, with C++11 enabled), the program just run normally.
>
> I inspected Qt's compile command is:
>
> ```
> g++ -c -pipe -g -std=c++0x -Wall -W -fPIE 
> -I/opt/Qt5.3.1/5.3/gcc_64/mkspecs/linux-g++ -I../lldbtest 
> -I/usr/lib/llvm-3.5/include -I. -o main.o ../lldbtest/main.cpp
> g++ -Wl,-rpath,/opt/Qt5.3.1/5.3/gcc_64 -o lldbtest main.o -I 
> /usr/lib/llvm-3.5/include -llldb
> ```
> But I didnt see any difference, what's the cause of the segment fault 
> only in command line?
>
> Thanks,
>
> Song Ziming
>
>
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> lldb-dev at cs.uiuc.edu
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