lldb cannot print TLS variable

Question

I've decided to use TLS variables on my C project to define some variables that should be valid throughout thread scope.

Here's my declaration : static __thread char log_username[100];

however, for some reason the lldb debugger fail to show them for the following reason :

(lldb) print log_username[2]
error: Couldn't materialize: couldn't get the value of variable log_username: 
No TLS data currently exists for this thread.
Errored out in Execute, couldn't PrepareToExecuteJITExpression

The debugger states that TLS data is currently not available, but if I use simple printf, it works.

Any idea how to resolve this, or just treat it as debugger limitation that I can live with ...

Answer 1

lldb 目前不支持 OS X 上的线程本地存储变量（不确定 Linux。）您可以通过为 TLS 变量创建访问器函数并在选择适当的线程后调用它们来解决此问题。

Answer 2

对于在 Linux 上调试 OpenMP 块的我来说，只有在从 GCC 更改为 Clang 并安装 LLVM 库后，我才能使用 LLDB 打印 TLV