Issue
I am trying to run valgrind to find memory leaks in my c++ program. I have set the flags -fsanitize=adress in my CMake. However, whenever I am trying to run the program with or without valgrind after this flag is set, I am getting the error: ASan runtime does not come first in initial library list; you should either link runtime to your application or manually preload it with LD_PRELOAD..
Then I tried setting LD_PRELOAD=/path/libasan.so.5 but it didn't make any difference. I am still getting the same error. Could anyone please give me some insights into what could cause this issue and how can I solve it? I'm using Ubuntu 20.04 with gcc 9.6.
First, when I realized there could be memory leak, I install valgrind and set the flags fsanitize=adress and -fsanitize=leak. First time, then compiled the program and ran it with valgrind. First run was successful, and the valgrind produced the output. Then, I made some changes to the program, build it successfully, and tried to run it with valgrind again, which caused the error. I tried using the LD_PRELOAD=/path/to/libasan.so.5 but it didn't seem to fix the issue
Solution
I am trying to run valgrind to find memory leaks in my c++ program. I have set the flags -fsanitize=adress in my CMake
You are trying to use two separate tools: Valgrind and AddressSanitizer at the same time. Don't do that -- use one or the other -- these tools can each individually find memory leaks (and a lot more), and are not designed to work together.
Even if this did work, it would be unnecessarily slow, as Valgrind would spend time emulating/executing instructions which AddressSanitizer inserted into your program. So instead of 4x slowdown typical for ASan or 15x slowdown typical for VG, you would be hit with 60x slowdown.
Answered By - Employed Russian Answer Checked By - Willingham (WPSolving Volunteer)
