PC Sampling: Disable coredump when sessions active

When doing a coredump, we try to park the wave and save its PC in
ttmp7/ttmp11, but these registers will be overwritten by PC Sampling
requests.

Change-Id: I60fb734eb3bed4ee3cc8d8bba9ec4a527fff9671

runtime/hsa-runtime/core/runtime/amd_aql_queue.cpp

@@ -1272,8 +1272,11 @@ bool AqlQueue::ExceptionHandler(hsa_signal_value_t error_code, void* arg) {
   // generated by hsa-runtime.
   if (!core::Runtime::runtime_singleton_->KfdVersion().supports_core_dump &&
       queue->agent_->isa()->GetMajorVersion() != 11) {
-    if (amd::coredump::dump_gpu_core())
-      debug_print("GPU core dump failed\n");
+
+    if (pcs::PcsRuntime::instance()->SessionsActive())
+      fprintf(stderr, "GPU core dump skipped because PC Sampling active\n");
+    else if (amd::coredump::dump_gpu_core())
+      fprintf(stderr, "GPU core dump failed\n");
     // supports_core_dump flag is overwritten to avoid generate core dump file again
     // caught by a different exception handler. Such as VMFaultHandler.
     core::Runtime::runtime_singleton_->KfdVersion(

runtime/hsa-runtime/core/runtime/runtime.cpp

@@ -1804,8 +1804,11 @@ bool Runtime::VMFaultHandler(hsa_signal_value_t val, void* arg) {
     // generated by hsa-runtime.
     if (faulty_agent && faulty_agent->isa()->GetMajorVersion() != 11 &&
         !runtime_singleton_->KfdVersion().supports_core_dump) {
-      if (amd::coredump::dump_gpu_core())
-        debug_print("GPU core dump failed\n");
+
+      if (pcs::PcsRuntime::instance()->SessionsActive())
+        fprintf(stderr, "GPU core dump skipped because PC Sampling active\n");
+      else if (amd::coredump::dump_gpu_core())
+        fprintf(stderr, "GPU core dump failed\n");
     }
     assert(false && "GPU memory access fault.");
     std::abort();

runtime/hsa-runtime/pcs/pcs_runtime.cpp

@@ -100,6 +100,10 @@ void PcsRuntime::DestroySingleton() {
 
 void ReleasePcSamplingRsrcs() { PcsRuntime::DestroySingleton(); }
 
+bool PcsRuntime::SessionsActive() const {
+  return pc_sampling_.size() > 0;
+}
+
 PcsRuntime::PcSamplingSession::PcSamplingSession(
     core::Agent* _agent, hsa_ven_amd_pcs_method_kind_t method, hsa_ven_amd_pcs_units_t units,
     size_t interval, size_t latency, size_t buffer_size,

runtime/hsa-runtime/pcs/pcs_runtime.h

@@ -65,6 +65,8 @@ class PcsRuntime {
   /// @brief Getter for the PcsRuntime singleton object.
   static PcsRuntime* instance();
 
+  bool SessionsActive() const;
+
   /// @brief Destroy singleton object.
   static void DestroySingleton();