LXR linux/tools/lib/lockdep/common.c

   1#include <stddef.h>
   2#include <stdbool.h>
   3#include <linux/compiler.h>
   4#include <linux/lockdep.h>
   5#include <unistd.h>
   6#include <sys/syscall.h>
   7
   8static __thread struct task_struct current_obj;
   9
  10/* lockdep wants these */
  11bool debug_locks = true;
  12bool debug_locks_silent;
  13
  14__attribute__((constructor)) static void liblockdep_init(void)
  15{
  16        lockdep_init();
  17}
  18
  19__attribute__((destructor)) static void liblockdep_exit(void)
  20{
  21        debug_check_no_locks_held(&current_obj);
  22}
  23
  24struct task_struct *__curr(void)
  25{
  26        if (current_obj.pid == 0) {
  27                /* Makes lockdep output pretty */
  28                prctl(PR_GET_NAME, current_obj.comm);
  29                current_obj.pid = syscall(__NR_gettid);
  30        }
  31
  32        return &current_obj;
  33}
  34