37 static bool Attach(pid_t pid) {  in Attach()  argument
38   if (ptrace(PTRACE_SEIZE, pid, 0, 0) == -1) {  in Attach()
42   if (ptrace(PTRACE_INTERRUPT, pid, 0, 0) == -1) {  in Attach()
43     ptrace(PTRACE_DETACH, pid, 0, 0);  in Attach()
50     if (ptrace(PTRACE_GETSIGINFO, pid, 0, &si) == 0) {  in Attach()
55   printf("%d: Failed to stop.\n", pid);  in Attach()
59 void DoUnwind(pid_t pid) {  in DoUnwind()  argument
60   unwindstack::Regs* regs = unwindstack::Regs::RemoteGet(pid);  in DoUnwind()
89   unwindstack::UnwinderFromPid unwinder(1024, pid);  in DoUnwind()
105   pid_t pid = atoi(argv[1]);  in main()  local
106   if (!Attach(pid)) {  in main()
107     printf("Failed to attach to pid %d: %s\n", pid, strerror(errno));  in main()
111   DoUnwind(pid);  in main()
113   ptrace(PTRACE_DETACH, pid, 0, 0);  in main()