Hello Rust in MacOS.

Install rust

run curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh to install rust tools.

Hello world

  • cargo new greeting
    • cargo new hello-world
  • cd greeting
  • cargo run

VSCode Debug

  • install rust-analyzer
  • install CodeLLDB
    • or download it form marketplace and install it locally with code --install-extension b6790052-5574-45be-98b7-11426ff972d0.vsix
  • create a lunch.json file
{
  "version": "0.2.0",
  "configurations": [
    {
      "type": "lldb",
      "request": "launch",
      "name": "Cargo launch",
      "cargo": {
        "args": [
          "build"
        ]
      },
      "args": []
    }
  ]
}

Screen Shot 2022-10-21 at 16 26 03

CLI Debug

  • $ cargo build
  • $ lldb ./target/debug/greeting
  • (lldb) breakpoint set -file main.rs -line 3 to set the breakpoint
  • (lldb) run to run program
  • (lldb) frame variable to show variables
  • (lldb) thread step-over to step over
  • (lldb) thread continue to continue running
  • (lldb) exit to exit program

More information you can see here: tutorial

History details:



➜  greeting git:(master) ✗ cargo build
    Finished dev [unoptimized + debuginfo] target(s) in 0.00s


➜  greeting git:(master) ✗ lldb ./target/debug/greeting
(lldb) target create "./target/debug/greeting"
Current executable set to '/Users/zhoukeke/Downloads/rust/greeting/target/debug/greeting' (x86_64).


(lldb) breakpoint set -file main.rs -line 3
Breakpoint 1: where = greeting`greeting::main::h32c37006812263d7 + 32 at main.rs:3:5, address = 0x0000000100004d90


(lldb) run
Process 24395 launched: '/Users/zhoukeke/Downloads/rust/greeting/target/debug/greeting' (x86_64)
Process 24395 stopped
* thread #1, name = 'main', queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
    frame #0: 0x0000000100004d90 greeting`greeting::main::h32c37006812263d7 at main.rs:3:5
   1    fn main() {
   2        let mut name = String::from("pipe");
-> 3        name.push_str(" zkk");
   4        println!("Hello, {}!", name);
   5    }
Target 0: (greeting) stopped.


(lldb) frame variable
(alloc::string::String) name = {
  vec = {
    buf = {
      ptr = {
        pointer = (pointer = "pipe")
        _marker = {}
      }
      cap = 4
      alloc = {}
    }
    len = 4
  }
}

(lldb) thread step-over
Process 24395 stopped
* thread #1, name = 'main', queue = 'com.apple.main-thread', stop reason = step over
    frame #0: 0x0000000100004dc4 greeting`greeting::main::h32c37006812263d7 at main.rs:4:5
   1    fn main() {
   2        let mut name = String::from("pipe");
   3        name.push_str(" zkk");
-> 4        println!("Hello, {}!", name);
   5    }
Target 0: (greeting) stopped.


(lldb) frame variable
(alloc::string::String) name = {
  vec = {
    buf = {
      ptr = {
        pointer = (pointer = "pipe zkk@\U00000004\U00000004\U00000010")
        _marker = {}
      }
      cap = 8
      alloc = {}
    }
    len = 8
  }
}

(lldb) thread continue
Resuming thread 0xad6e3 in process 24395
Process 24395 resuming
Hello, pipe zkk!
Process 24395 exited with status = 0 (0x00000000)


(lldb) exit
➜  greeting git:(master) ✗

reference