950 typedef struct ucontext {  struct
951   uint32_t uc_flags;
952   struct ucontext* uc_link;
953   stack_t uc_stack;
954   mcontext_t uc_mcontext;
955   __sigset_t uc_sigmask;
983 typedef struct ucontext {  struct
984   uint32_t uc_flags;
985   struct ucontext* uc_link;
986   stack_t uc_stack;
987   mcontext_t uc_mcontext;
988   __sigset_t uc_sigmask;
1002 typedef struct ucontext {  struct
1003   uint32_t uc_flags;
1004   struct ucontext* uc_link;
1005   stack_t uc_stack;
1006   mcontext_t uc_mcontext;
1007   __sigset_t uc_sigmask;
1044   ucontext_t* ucontext = reinterpret_cast<ucontext_t*>(context);  in ProfilerSignalHandler()  local