如何在 swift 的 lldb 终端中设置断点？

Question

我正在尝试在终端中使用 lldb 调试我的 swift 程序。我用命令

编译了我的代码

swiftc hello.swift

然后我运行 lldb 使用

lldb hello

在 lldb 程序中，我尝试使用

设置断点

(lldb) breakpoint set --file hello.swift --line 10

但我得到了错误

Breakpoint 2: no locations (pending).
WARNING:  Unable to resolve breakpoint to any actual locations.

这是 hello.swift 的代码：

func answer()-> Int{
    var value = 12
    value = value + 9
    return 4 * value
}

let arr = [0, 1, 2, 3, 4]

for _ in arr{
    print(answer())
}

我做错了什么？

Answer 1

编译程序时应设置-g选项。来自 swiftc --help:

-g Emit debug info. This is the preferred setting for debugging with LLDB.

示例会话：

% swiftc -g hello.swift

% lldb hello
(lldb) target create "hello"
Current executable set to '/tmp/x/hello' (x86_64).

(lldb) breakpoint set --file hello.swift --line 10
Breakpoint 1: where = hello`main + 256 at hello.swift:10:11, address = 0x0000000100003bf0

(lldb) run
Process 15967 launched: '/tmp/x/hello' (x86_64)
Process 15967 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
    frame #0: 0x0000000100003bf0 hello`main at hello.swift:10:11
   7    let arr = [0, 1, 2, 3, 4]
   8    
   9    for _ in arr{
-> 10       print(answer())
   11   }
Target 0: (hello) stopped.

如何在 swift 的 lldb 终端中设置断点？

How do you set breakpoints in the lldb terminal for swift?

swift

lldb