gdb: show corresponding lines in source and asm

问题

When running gdb in TUI mode, showing source and assembly, is there an option to highlight the set of instructions mapping to a selected source line?

回答1:

You can partially do it with GDB Dashboard.

https://github.com/cyrus-and/gdb-dashboard

From below screenshot you can see that the 1st call to operator<< in this line of code:

std::cout << a << std::endl;

is mapped to 4 assembly instructions:

0x00000000004011a2  main()+28 mov    -0x4(%rbp),%eax
0x00000000004011a5  main()+31 mov    %eax,%esi
0x00000000004011a7  main()+33 mov    $0x404060,%edi
0x00000000004011ac  main()+38 callq  0x401070 <_ZNSolsEi@plt>

They are highlighted with green color in Assembly section.

You can move to 2nd call to operator<< in the same line executing ni command several times and you will see the second mapping to 3 assembly instructions:

0x00000000004011b1  main()+43 mov    $0x401030,%esi
0x00000000004011b6  main()+48 mov    %rax,%rdi
0x00000000004011b9  main()+51 callq  0x401050 <_ZNSolsEPFRSoS_E@plt>

来源：https://stackoverflow.com/questions/59697897/gdb-show-corresponding-lines-in-source-and-asm