Revert "Implement memory fault analysis through context save area"

This reverts commit 75c9506f9d.

Change-Id: Ibf11b764b383b9be291f3009a30550e1a1e2d115

runtime/hsa-runtime/core/util/flag.h

@@ -43,8 +43,6 @@
 #ifndef HSA_RUNTIME_CORE_INC_FLAG_H_
 #define HSA_RUNTIME_CORE_INC_FLAG_H_
 
-#include <algorithm>
-#include <cctype>
 #include <stdint.h>
 
 #include <string>
@@ -62,15 +60,8 @@ class Flag {
     std::string var = os::GetEnvVar("HSA_CHECK_FLAT_SCRATCH");
     check_flat_scratch_ = (var == "1") ? true : false;
 
-    var = os::GetEnvVar("HSA_DEBUG_FAULT");
-    std::transform(var.begin(), var.end(), var.begin(),
-                   [](unsigned char c) { return std::tolower(c); });
-
-    if (var == "analyze") {
-      debug_fault_ = DEBUG_FAULT_ANALYZE;
-    } else {
-      debug_fault_ = DEBUG_FAULT_OFF;
-    }
+    var = os::GetEnvVar("HSA_ENABLE_VM_FAULT_MESSAGE");
+    enable_vm_fault_message_ = (var == "0") ? false : true;
 
     var = os::GetEnvVar("HSA_ENABLE_QUEUE_FAULT_MESSAGE");
     enable_queue_fault_message_ = (var == "0") ? false : true;
@@ -105,15 +96,10 @@ class Flag {
     tools_lib_names_ = os::GetEnvVar("HSA_TOOLS_LIB");
   }
 
-  enum DebugFaultEnum {
-    DEBUG_FAULT_OFF,
-    DEBUG_FAULT_ANALYZE,
-  };
-
   bool check_flat_scratch() const { return check_flat_scratch_; }
 
-  DebugFaultEnum debug_fault() const { return debug_fault_; }
-
+  bool enable_vm_fault_message() const { return enable_vm_fault_message_; }
+  
   bool enable_queue_fault_message() const { return enable_queue_fault_message_; }
 
   bool enable_interrupt() const { return enable_interrupt_; }
@@ -138,7 +124,7 @@ class Flag {
 
  private:
   bool check_flat_scratch_;
-  DebugFaultEnum debug_fault_;
+  bool enable_vm_fault_message_;
   bool enable_interrupt_;
   bool enable_sdma_;
   bool emulate_aql_;