tcb-offsets.sym

来自「glibc 库, 不仅可以学习使用库函数,还可以学习函数的具体实现,是提高功力的」· SYM 代码 · 共 15 行

#include <sysdep.h>
#include <tls.h>

--

-- Abuse tls.h macros to derive offsets relative to the thread register.
-- # define __builtin_thread_pointer()  ((void *) 0)
-- # define thread_offsetof(mem)     ((void *) &THREAD_SELF->mem - (void *) 0)
-- Ho hum, this doesn't work in gcc4, so Know Things about THREAD_SELF
#define thread_offsetof(mem)	(long)(offsetof(struct pthread, mem) - sizeof(struct pthread))

MULTIPLE_THREADS_OFFSET		thread_offsetof (header.multiple_threads)
PID_OFFSET			thread_offsetof (pid)
TID_OFFSET			thread_offsetof (tid)