revert to use task_info for process used memory

Author: naussika

Common/Cpp/MemoryUtilization/MemoryUtilization_Mac.tpp

@@ -93,31 +93,35 @@ MemoryUsage process_memory_usage(){
         }
     }
     usage.total_system_memory = physical_memory;
+     {
+        task_vm_info_data_t tvi;
+        mach_msg_type_number_t count = TASK_VM_INFO_COUNT;
+        if(KERN_SUCCESS == task_info(mach_task_self(), TASK_VM_INFO, (task_info_t) &tvi, &count))
+        {
+            usage.process_physical_memory = tvi.resident_size; // resident_size = internal + external + reusable
+        } else {
+            std::cerr << "Failed to get task info." << std::endl;
+        }
+    }
     {
-        mach_vm_address_t address = 0;
         mach_vm_size_t size = 0;
         vm_region_extended_info_data_t info;
         mach_msg_type_number_t count = VM_REGION_EXTENDED_INFO_COUNT;
         mach_port_t object_name;
-        unsigned int pages_resident = 0;
         unsigned int pages_swapped_out = 0;
-        unsigned int pages_dirtied = 0;
 
-        while (true) {
+        for (mach_vm_address_t address = 0;; address += size) {
             auto kr = mach_vm_region(mach_task_self(), &address, &size, VM_REGION_EXTENDED_INFO, (vm_region_info_t)&info, &count, &object_name);
             if (kr != KERN_SUCCESS) {
                 if (kr == KERN_INVALID_ADDRESS) { // end of the address space
                     break;
                 }
-                std::cerr << "mach_vm_region_recurse failed with error: " << mach_error_string(kr) << std::endl;
+                std::cerr << "mach_vm_region failed with error: " << mach_error_string(kr) << std::endl;
                 break;
             }
-            pages_resident += info.pages_resident;
             pages_swapped_out += info.pages_swapped_out;
-            pages_dirtied += info.pages_dirtied;
             address += size;
         }
-        usage.process_physical_memory = (size_t)(pages_resident - pages_dirtied) * (size_t)vm_page_size;
         usage.process_virtual_memory = usage.process_physical_memory + (size_t)pages_swapped_out * (size_t)vm_page_size;
     }
     // ref: https://github.com/htop-dev/htop/blob/main/darwin/Platform.c