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原来是两个值夜的军士在四处巡查。葫芦也打起精神，凝神应付。You can see that PizzaStore depends on a SImpleFactory, which depends on an abstract pizza. Under normal circumstances, to decouple, control inversion is required. The core idea of control inversion is that neither the upper structure nor the lower structure depends on implementation, but on abstraction.徐文长随口笑道，罗龙文。许仙与白素贞在相处中，彼此相爱。一直爱慕白素贞的鼠妖景松和倾心许仙的金如意千方百计离间二人感情，但许白二人痴心不改，历尽磨难后喜结连理。二人开设医馆保和堂，小青也与伙计张玉堂相恋，几人联手救死扶伤，造福一方。法海因开天眼，预见到水漫金山的一幕，担心二妖是伪善，一切不过是为了蛊惑人心。怀疑之下，他道心动摇，产生心魔。如意看到许白生死相随的深情，心灰意冷之下被心魔蛊惑，制造凶案嫁祸白蛇。为了保护妻子，许仙求助法海，以纯善之身困住心魔，并借助金山寺众僧之力，与心魔同归于尽。白素贞不舍许仙牺牲，不惜水漫金山逼法海放人，最终犯下大错，被镇压在雷峰塔下。许仙从此四海为医，悬壶济世，替妻赎罪。For the convenience of the experiment, we directly use the functions in libc.so.6 as the attack functions to be executed. This is a C program runtime in Linux, which holds a large number of available functions and contains system ("/bin/sh"). Therefore, we can use ROPgadget tool to obtain the code fragments that we can exploit, and use pwntool to exploit the vulnerabilities of vulnerable programs, thus achieving our attack purpose, that is, running system ("/bin/sh"). In order to facilitate the subsequent use of ROPgadget tool to find gadget and attack, it is necessary to copy the libc.so.6 file to the operation directory. First, use the "ldd" command to view the source directory, and then use the "cp" command to copy it to the operation directory.秦淼心道，原来哨子这么响，我真傻，先前他们骗我，说葫芦哥哥被蛇咬了，我还就信了。