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
   8 static __thread struct task_struct current_obj;
   9
  10 /* lockdep wants these */
  11 bool debug_locks = true;
  12 bool 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
  24 struct 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 }