================
@@ -444,6 +461,88 @@ NativeProcessLinux::NativeProcessLinux(::pid_t pid, int
terminal_fd,
SetState(StateType::eStateStopped, false);
}
+llvm::Expected<std::vector<::pid_t>> NativeProcessLinux::Seize(::pid_t pid) {
+ Log *log = GetLog(POSIXLog::Process);
+
+ uint64_t options = GetDefaultPtraceOpts();
+ Status status;
+ // Use a map to keep track of the threads which we have attached/need to
+ // attach.
+ Host::TidMap tids_to_attach;
+ while (Host::FindProcessThreads(pid, tids_to_attach)) {
+ for (Host::TidMap::iterator it = tids_to_attach.begin();
+ it != tids_to_attach.end();) {
+ if (it->second == true) {
+ continue;
+ }
+ lldb::tid_t tid = it->first;
+ if ((status = PtraceWrapper(PTRACE_SEIZE, tid, nullptr, (void *)options))
+ .Fail()) {
+ // No such thread. The thread may have exited. More error handling
+ // may be needed.
+ if (status.GetError() == ESRCH) {
+ it = tids_to_attach.erase(it);
+ continue;
+ }
+ if (status.GetError() == EPERM) {
+ // Depending on the value of ptrace_scope, we can return a
+ // different error that suggests how to fix it.
+ return AddPtraceScopeNote(status.ToError());
+ }
+ return status.ToError();
+ }
+
+ if ((status = PtraceWrapper(PTRACE_INTERRUPT, tid)).Fail()) {
----------------
DavidSpickett wrote:
Shame that we can't do these two PtraceWrapper calls like:
```
if (status = PtraceWrapper(PTRACE_SEIZE).Fail() || status =
PTraceWrapper(PTRACE_INTERRUPT).Fail())
<the error handling bit>
```
Maybe something with `,` could do it, I'm not too familiar with that.
Another way to do it is:
```
status = PTraceWrapper(PPTRACE_SEIZE);
if (!status.Fail())
status = PTraceWrapper(PTRACE_INTERRUPT)
if (status.Fail())
<common error handling>
```
https://github.com/llvm/llvm-project/pull/137041
_______________________________________________
lldb-commits mailing list
lldb-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
