33 void DfxPtrace::Detach(pid_t tid)  in Detach()  argument
35     if (tid > 0) {  in Detach()
36         ptrace(PTRACE_CONT, tid, 0, 0);  in Detach()
37         ptrace(PTRACE_DETACH, tid, nullptr, nullptr);  in Detach()
41 bool DfxPtrace::Attach(pid_t tid, int timeout)  in Attach()  argument
43     if (tid <= 0) {  in Attach()
47     if (ptrace(PTRACE_SEIZE, tid, 0, 0) != 0) {  in Attach()
48         LOGW("Failed to seize tid(%d), errno=%d", tid, errno);  in Attach()
52     if (ptrace(PTRACE_INTERRUPT, tid, 0, 0) != 0) {  in Attach()
53         LOGW("Failed to interrupt tid(%d), errno=%d", tid, errno);  in Attach()
54         ptrace(PTRACE_DETACH, tid, nullptr, nullptr);  in Attach()
61         if (waitpid(tid, nullptr, WNOHANG) > 0) {  in Attach()
67             ptrace(PTRACE_DETACH, tid, nullptr, nullptr);  in Attach()
68             LOGW("Failed to wait tid(%d) attached.", tid);  in Attach()