I have built a C++ application with an gcc 8.3.0 cross-compiler for AArch64 using the compile arguments -no-pie -g to enable debugging and profiling (without instrumentation, just with sampling). I have used -O0 and -O2, but the effect described below stays the same.
I have set up a path mapping for the source path lookup in Momentics IDE. When I run the application in the debugger, everything works as expected and I can step through the source code of a file I am interested in.
When I switch the same launch configuration to "Profile", select "Sampling" as profiling method and then run the profiler, I can see in the "Execution Time" view how much time is spent in a method of the respective source file. As soon as I double-click onto that file to see where the time is being spent, I get the error message "Unable to open source file - The profiler was unable to determine the source file this symbol is in. Debug information may be missing or symbol does not belong to analyzed binary."
This error message must be wrong, right? If it was true, I could not step through exactly that file in the debugger.
What can be the reason for the error message? I have no function instrumentation or call count instrumentation, but I don't necessarily need it for profiling, correct?