================
@@ -394,6 +420,114 @@ Status ELFLinuxPrPsInfo::Parse(const DataExtractor &data,
return error;
}
+std::optional<ELFLinuxPrPsInfo>
+ELFLinuxPrPsInfo::Populate(const lldb::ProcessSP &process_sp) {
+ ELFLinuxPrPsInfo prpsinfo{};
+ prpsinfo.pr_pid = process_sp->GetID();
+ ProcessInstanceInfo info;
+ if (!process_sp->GetProcessInfo(info)) {
+ return std::nullopt;
+ }
+ prpsinfo.pr_nice = info.GetPriorityValue().value_or(0);
+ prpsinfo.pr_zomb = 0;
+ if (auto zombie_opt = info.IsZombie(); zombie_opt.value_or(false)) {
+ prpsinfo.pr_zomb = 1;
+ }
+ /**
+ * In the linux kernel this comes from:
+ * state = READ_ONCE(p->__state);
+ * i = state ? ffz(~state) + 1 : 0;
+ * psinfo->pr_sname = (i > 5) ? '.' : "RSDTZW"[i];
+ *
+ * So we replicate that here. From proc_pid_stats(5)
+ * R = Running
+ * S = Sleeping on uninterrutible wait
+ * D = Waiting on uninterruptable disk sleep
+ * T = Tracing stop
+ * Z = Zombie
+ * W = Paging
+ */
+ lldb::StateType process_state = process_sp->GetState();
+ switch (process_state) {
+ case lldb::StateType::eStateSuspended:
+ prpsinfo.pr_sname = 'S';
+ prpsinfo.pr_state = 1;
+ break;
+ case lldb::StateType::eStateStopped:
+ [[fallthrough]];
+ case lldb::StateType::eStateStepping:
+ prpsinfo.pr_sname = 'T';
+ prpsinfo.pr_state = 3;
+ break;
+ case lldb::StateType::eStateUnloaded:
+ [[fallthrough]];
+ case lldb::StateType::eStateRunning:
+ prpsinfo.pr_sname = 'R';
+ prpsinfo.pr_state = 0;
+ break;
+ default:
+ break;
+ }
+
+ /**
+ * pr_flags is left as 0. The values (in linux) are specific
+ * to the kernel. We recover them from the proc filesystem
+ * but don't put them in ProcessInfo because it would really
+ * become very linux specific and the utility here seems pretty
+ * dubious
+ */
+
+ if (info.EffectiveUserIDIsValid()) {
+ prpsinfo.pr_uid = info.GetUserID();
+ }
+ if (info.EffectiveGroupIDIsValid()) {
+ prpsinfo.pr_gid = info.GetGroupID();
+ }
+
+ if (info.ParentProcessIDIsValid()) {
+ prpsinfo.pr_ppid = info.GetParentProcessID();
+ }
+
+ if (info.ProcessGroupIDIsValid()) {
+ prpsinfo.pr_pgrp = info.GetProcessGroupID();
+ }
+
+ if (info.ProcessSessionIDIsValid()) {
+ prpsinfo.pr_sid = info.GetProcessSessionID();
+ }
+ constexpr size_t fname_len = std::extent_v<decltype(prpsinfo.pr_fname)>;
+ static_assert(fname_len > 0, "This should always be non zero");
+ const llvm::StringRef fname = info.GetNameAsStringRef();
+ auto fname_begin = fname.begin();
+ std::copy(fname_begin,
+ std::next(fname_begin, std::min(fname_len, fname.size())),
+ prpsinfo.pr_fname);
+ prpsinfo.pr_fname[fname_len - 1] = '\0';
+ auto args = info.GetArguments();
+ if (!args.empty()) {
----------------
feg208 wrote:
removed
https://github.com/llvm/llvm-project/pull/104109
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