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马西瑞两兄弟统治着约翰内斯堡的黑社会，但一个超自然的家族诅咒和错综复杂的背叛之网却可能毁掉他们……等闲了，我陪你一起去。For example, the above is only a simple literal quantity structure. All member variables above are accessed through Singleton, but it is not a single mode. Because the monomer pattern has a more important feature, that is, it can be instantiated only once. The above is only a class that cannot be instantiated, so it is not a monomer pattern. Object literal quantity is one of the methods used to create a single pattern;就算敏感点也无妨 2020《信义》是以恭愍王元年为时代背景的史剧，剧中李敏镐饰演的角色是一名20岁左右的王的护卫崔莹，并与穿越来到高丽时代的医生恩琇之间展开共同辅助拯救天下百姓的王成就伟业的历史剧。Figure 1 is an example of a JOP attack. In this example, the attacker's aim is to execute a system call "int 0x80" to open a new command line window. To do this, an attacker needs to modify the contents of the eax register to "0x0000000b" and the ebx register to the string "/bin/sh" before "int 0x80" is called, and the ecx and edx registers must point to the value "0x00000000". Suppose the value "0x0000000" and the string "/bin/sh" can be found in memory when the program is running. An attacker needs to construct the value "0x0000000b" himself. However, for the value "0x0000000b", when an attacker saves data to the stack through a buffer overflow, the "0x00" byte will trigger the system to terminate the read operation. This example specifically describes how the attacker uses the existing code snippet in the program to modify the value of val pushed into the stack by the attacker step by step from "0xffffff0b" to the value required by the system call "0x0000000b", thus implementing JOP attack. The following are the detailed steps of the process.