On the ‘target remote’ args field write | /usr/bin/vgdb. Now you are ready to debug your program under Valgrind. Select the configuration of the program you want to debug and run it with Valgrind memcheck. Valgrind now waits for a debugger to connect before starting your program. After setting the configuration to Debug all the breakpoints are hit. Without stopping the valgrind process, select the GDB Remote Debug you created and run it in debug mode. Please ensure that you have following configuration: Select the MenuItem Run/EditConfigurations. Now Valgrind will detect that a debugger has connected and it will start your program. On the Run tab you can see the output of the program under analysis. You’ll see there the Valgrind report once the program stops. in Clion and it detected the CMakeLists.txt and added all build configurations just fine, but when I try and run it through Clion I get the following error: Code: Failed to initialize video. On the Debug tab you have your usual debug controls. Your GPU may not be supported, or your graphics drivers may need to be updated. Valgrind will raise a trap signal (SIGTRAP) when it detects a problem. You can then inspect the stack trace, and your usual debugging commands. You can also unleash the power of Valgrind by sending commands to it through CLion’s gdb console. Troubleshooting Regular Valgrind analysis ĬLion won’t display the output of monitor commands sent to Valgrind’s gdbserver. However you should avoid using the raw pointers in modern C++ programs and start using std::vector std::unique_ptr as suggested by others as well.We just configured Valgrind to wait for a gdb debugger before starting your program. Once you are able to figure it out your first error, fix it and rerun it and see what are other errors you are getting.This steps should be done till no error is getting reported by Valgrind. This should be the best possible way to understand and resolve your problem. This way Valgrind would attach your program in the debugger when your first memory error is detected so that you can do live debugging(GDB). $ valgrind -tool=memcheck -db-attach=yes. So you may want to attach your program(a.out). However as you have mentioned in your question that you are able to attach your program using Valgrind. This is clearly a symptoms of invalid memory uses within your program.This would be bit difficult to find by looking out your code snippet as it is most likely be the side effect of something else bad which has already happened. What can this be? I am out of ideas to explore. It also mentions that there's a Conditional jump or move depends on uninitialized value(s), but looking at the code I can't figure out how that's possible. Running valgrind the only information I got on the segfault was that it was a "General Protection Fault" and something about default response to 11. I tried setting a variable j = i and stuff like that, but I haven't found anything that works. I tried some other assorted operations trying to figure out what is going on. With a little more experimentation I eventually created a string stream before the loop and write an empty string into it for each iteration of the loop and there is no segfault. It showed the entire range it was suppose to be looping over and there was no segfault. Next I wanted to know how far into the loop the segfault happend so I added: std::cout << i << '\n' Using cout debugging I found that it must be in the loop. Switching to debug mode, unfortunately, makes the segfault stop. There appears to be a segfault somewhere in the loop. I know that this block is large enough The gist of the code is: int *sorted_array = (int*)memory I am trying to debug code that isn't working on a unix machine. What sort of conditions can cause this segfault? I will not be using smart pointers or vectors for very specific reasons. Please do not tell me what to do to fix my code. It works when I set it up so that entry_count is small, and I write it by hand instead of by loop (sorted_order = 0 sorted_order = 1. It works when, in the loop, I set every element to 0 or to entry_count-1.
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