Writing a C Compiler

A DEBUGGING ASSEMBLY CODE WITH GDB OR LLDB

At some point, your compiler is going to generate assembly code that doesn’t behave correctly, and you’ll need to figure out why. When that happens, a command line debugger is indispensable for understanding what’s going wrong. A debugger lets you pause a running program, step through it one instruction at a time, and examine the program state at different points. You can use either GDB (the GNU debugger) or LLDB (the debugger from the LLVM Project) to debug the assembly code your compiler generates. I recommend using GDB if you’re on Linux and LLDB if you’re on macOS (I think GDB has a slightly ...