I am trying to debug clang using eclipse. I have put a break point in clang/lib/lex/preprocessor.cpp at the preprocessor's constructor.
I have set a "test.c" file as an argument in the debug configurations.
Went to Run-> Debug As-> Local C/C++ Application.
It asked "Choose local application to debug". I chose "clang" and clicked OK.
It started building the code. build completed.
Stopped at main() in the debug window. (No source available for main())
After some step overs, it says "terminated: gdb Debugger (Exited. Exit code=255)"
I am not taken to the clang code (preprocessor code). can someone please tell me how to debug the clang code.? I want to see the code flow in clang. and how clang is constructing the AST.
Clang binary in fact contains two apps: driver and compiler frontend itself. The latter is executed via -cc1 cmdline option. So, just add -v to clang command line to see the actual sequence of tool invocation, grab the frontend cmdline (the one containing -cc1) and use this cmdline for debugging.
Had the same problem - you are missing the -g flag (enable debug info) when you are building your binaries.
When running the cmake run it with the CMAKE_BUILD_TYPE option:
cmake -G "Eclipse <CDT_Version> - Unix Makefiles" -D_ECLIPSE_VERSION=<eclipse_version> -DCMAKE_BUILD_TYPE=Debug <llvm_source_path>
example :
cmake -G "Eclipse CDT4 - Unix Makefiles" -D_ECLIPSE_VERSION=4.4 -DCMAKE_BUILD_TYPE=Debug ../llvm/
hope that this helps.
Related
Using -fsanitizer while compiling programs helps in finding location of memory leaks easily. But how to use this with vscode.
I only know that for compiling a program in vscode through terminal we need to type in g++ file_name.cpp -o executable_name.exe and for running .\program_name
Adding -fsanitizer to this command as an argument does not work for me. How to compile your program using fsanitizer on vscode?
Edit: I have been trying to use it as
g++ -std=c++17 -O2 -Wall -fsanitize=address
tempCodeRunnerFile.cpp -o tempcodeRunnerfile.exe
But this keeps giving me some kind of error:
C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lasan: No such file or directory
collect2.exe: error: ld returned 1 exit status
This is unrelated to VSCode. The problem is your platform - MinGW traditionally has poor sanitizer support.
Your MSYS2 environment, MINGW64, only supports UBSAN (with stripped-down error reporting, compile with -fsanitize=undefined -fsanitize-undefined-trap-on-error).
There's also CLANG64 environment, which does have ASAN. Install its Clang (pacman -S mingw-w64-clang-x86_64-clang), and compile using clang++ located at C:\msys64\clang64\bin. If you're compiling from MSYS2 terminal, make sure you start the right one: launch it with clang64.exe, or the "MSYS2 Clang x64" shortcut (I don't remember the exact name).
I am trying to build a C project on Eclipse CDT with gcc.
First build worked fine, then I made a change to the source and second build appeared to try and link to a load of files I had not specified, then gets errors complaining it cannot find them. The gcc command it is running is:
gcc "-LC:\\SVN\\FloodAssessmentTool\\branches\\floatlite\\float\\python\\libs" -o float.exe "float\\python\\Lib\\site-packages\\markupsafe\\_speedups.o" "float\\.metadata\\.plugins\\org.eclipse.cdt.make.core\\specs.o" -lpython27
Whereas I am only expecting:
gcc "-LC:\\SVN\\FloodAssessmentTool\\branches\\floatlite\\float\\python\\libs" -o float.exe -lpython27
The only library I have specified to link against in the project settings is python27...
Whats happening?
*** Internal Builder is used for build ****
g++ -O0 -g3 -Wall -c -fmessage-length=0 -osrc\first.o ..\src\first.cpp
Internal Builder: Exec error:Launching failed
Build error occurred, build is stopped
Time consumed: 62 ms.
I am getting the above error in eclipse console when I tried to build my first "hello world" CPP program. Below are the steps I followed.
Installed Eclipse Europa.
Installed MinGW.
Open Eclipse goto window->preferences->c/C++->NEW CDT project wizard-> changed the Tool chain as "MinGW GCC".
When I opened the eclipse workspace manually there is no exe generated for the program.
My PATH variable in the project properties has "C:\MinGW" as value.
I searched much in net and still this "Launch Failed No Binaries" did not go off.
Please help...
"Launch failed No Binaries" means the program is not compiled.So this is the problem
related with MinGW GCC.Check you gave all the environmental variables necessary for the MINGW
correctly.
MoreOver I Suggest CodeBlocks IDE as a replacement.It is much Better than eclipse for c++
The link is CodeBlocks Download Link
I am using eclipse to execute a cuda program. I have downloaded a CUDA PLUGIN for
eclipse. When I execute sample cuda program given by plugin its fine but when I try
to execute any other program I am getting error undefined reference to main...
make
Building target: Add_cuda
Invoking: NVCC Linker
nvcc -L/export/trainee3/dinesh/cuda5.0/lib64 -o "Add_cuda" ./mycuda.o -lcudart
/usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: ld returned 1 exit status
I found in stackoverflow that some times we get this problem because of system startup file
I used flag -nostartfiles but it is not working in my case..
I have included lib64 and include path in c++ build.
So any suggestion to over come this problem....
We've been over this already.
Use nsight eclipse edition instead.
If you have cuda 5.0 or 5.5 installed, just type nsight in a terminal session.
If you really want to use that Eclipse CUDA plugin (which is no longer supported, I don't believe), then start with the C++ sample project, which you agree now and back then would work. Then modify the source code in that project. Don't create your own project.
Install CUDA 5. It comes with Nsight Eclipse version. Very Elegant to use. NV Visual profiler is integrated with Nsight. Syntax highlighting and debug mode are very easy to use.
I have a Beaglebone (Rev: A6) and i want to develop C/C++ program in windows 7 using Eclipse and then transfer executable in the board. But i'm having trouble setting up compiler/debugger/toolchain needed for Beaglebone. Searching the internet only gives me how to setup environment in Linux like installing 'arm-linux-gnueabi', setting up the paths to 'includes' etc. I need a step by step instruction to set up the environment in Eclipse in a windows machine. Can anyone help ?
I have tried these steps:
1. I have GNUARM installed on windows.
2. On eclipse IDE i open a C++ project with Corss GCC.
3. From project -> properties -> C/C++ build -> settings i add 'arm-elf-' to every cross compiler command.
4. From the GNUARM installation directory i add few path to '.../include/' in the 'C++ General -> paths and symbos'.
my 'build all' shows something as below:
10:32:20 **** Build of configuration Debug for project h ****
make all
Building file: ../src/hello.cpp
Invoking: Cross G++ Compiler
arm-elf-g++ -I"C:\GNUARM\include\c++\4.1.1" -I"C:\GNUARM\include\c++\4.1.1\arm-elf" - I"C:\GNUARM\include\c++\4.1.1\backward" -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP - MF"src/hello.d" -MT"src/hello.d" -o "src/hello.o" "../src/hello.cpp"
Finished building: ../src/hello.cpp
Building target: h
Invoking: Cross G++ Linker
arm-elf-g++ -L"C:\GNUARM\lib\gcc\arm-elf\4.1.1\include" -o "h" ./src/hello.o
Finished building target: h
10:32:23 Build Finished (took 2s.967ms)
It is simple 'Hello world' printing program. From the project explorer 'Debug->src->hello.o -[arm/le]' i copy it and when run on beaglebone with
chmod ugo+x hello.o
./hello.o
-sh: ./hello.o: cannot execute binary file
the above massage is printed. I don't know what i did wrong. Perhaps the ARM environment in eclipse is set up incorrectly.
Isn't hello.o the pre-linked object file (just the compiled content of hello.cpp)? It doesn't contain the startup code or any library functions. The linker adds those to produce the final output.
Don't you want to run the linker ouput file h (which should already be executable)?
i got my answer here. http://www.acmesystems.it/foxg20_eclipse_windows_c. CodeSourcery was the toolchain that i was looking for and this also explains how to setup the corss compiling environment.