Signal-based profiler/Non-Signal-based: prevent deadlock

profiler/src/ProfilerEngine/Datadog.Profiler.Native.Linux/LinuxStackFramesCollector.cpp

@@ -97,15 +97,15 @@ StackSnapshotResultBuffer* LinuxStackFramesCollector::CollectStackSampleImplemen
     // Otherwise, the CPU consumption to collect the callstack, will be accounted as "user app CPU time"
     auto timerId = pThreadInfo->GetTimerId();
 
-    _plibrariesInfo->UpdateCache();
-
     if (selfCollect)
     {
         // In case we are self-unwinding, we do not want to be interrupted by the signal-based profilers (walltime and cpu)
         // This will crashing in libunwind (accessing a memory area  which was unmapped)
         // This lock is acquired by the signal-based profiler (see StackSamplerLoop->StackSamplerLoopManager)
         pThreadInfo->GetStackWalkLock().Acquire();
 
+        _plibrariesInfo->UpdateCache();
+
         on_leave
         {
             pThreadInfo->GetStackWalkLock().Release();
@@ -143,6 +143,8 @@ StackSnapshotResultBuffer* LinuxStackFramesCollector::CollectStackSampleImplemen
             }
         };
 
+        _plibrariesInfo->UpdateCache();
+
         std::unique_lock<std::mutex> stackWalkInProgressLock(s_stackWalkInProgressMutex);
 
         const auto threadId = static_cast<::pid_t>(pThreadInfo->GetOsThreadId());