C# memory management

Windows uses a system: the virtual addressing system, which maps the memory addresses available to the program to the actual addresses in the hardware memory. These tasks are completely managed by Windows in the background. The net result is that each process on a 1-bit processor can use 4GB of memory—regardless of how much hard drive space is actually available on the computer (on a 64-bit processor, this number will be larger). This 4GB of memory actually contains All parts of the program, including the executable code, all DLLs loaded, and the contents of all variables used when the program is running. This 4GB of memory is called the virtual address space, or virtual memory.

Each storage unit in 4GB is sorted starting from 0 and going up. To access a value stored in a certain space in memory, you need to provide the number representing the storage unit. In any complex high-level language, such as VB, C#, and Java, the compiler is responsible for converting variable names that humans can understand into memory addresses that the processor can understand. In the virtual memory of the process, there is an area called the stack. The stack stores value data types that are not object members. In addition, when calling a method, the stack is also used to store a copy of all parameters passed to the method. .

## Stack pointer (a variable maintained by the operating system represents the address of the next free storage unit in the stack. The first time the program starts At runtime, the stack pointer points to the end of the memory block reserved for the stack. The stack is actually filled downwards, that is, when data is pushed onto the stack, the stack pointer will be adjusted accordingly. Points to the next free memory location. This situation is shown in Figure 13-1. In this figure, the stack pointer 8O000 (HexC3500) is shown, and the next free memory location is address #.

# Note that unlike the stack, the memory on the heap is upward allocated, so the free space is above the used space

##Compiled from: C# Advanced Programming

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