| 在Linux 2.6.11中进程调用malloc函数的情景分析 |
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| 引用本文： | 郑杰,郭益林,吴爱华.在Linux 2.6.11中进程调用malloc函数的情景分析[J].电脑编程技巧与维护,2009(22):24-26,37. |
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| 作者姓名： | 郑杰 郭益林 吴爱华 |
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| 作者单位： | 厦门大学,厦门,361005 |
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| 摘 要： | 在Linux系统中用户调用malloc函数的过程实际上是一个间接调用brk函数的过程，brk函数在内核中的实现为sysbrk函数。详细探讨了Linux内核2．6．11版本中内存管理与分配的细节，重点分析了sysbrk函数的代码，并提供了do_munmap和do_brk0这两个主要的函数的流程图。sys_brk函数可以用来分配空间，即把动态分配区底部的边界往上推，也可以用来释放内存，即归还空间。因此它的代码也大致上分成两部分，对相关函数调用与流程作了详细的分析。
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| 关 键 词： | 进程调用 进程空间 malloc sys_brk do_brk do_munmap |
The Scenario Analysis of Procedure Call of Malloc Function in Linux 2.6.11 |
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| ZHENG lie,GUO Yilin,WU Aihua.The Scenario Analysis of Procedure Call of Malloc Function in Linux 2.6.11[J].Computer Programming Skills & Maintenance,2009(22):24-26,37. |
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| Authors: | ZHENG lie GUO Yilin WU Aihua |
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| Affiliation: | ZHENG Jie,GUO Yilin,WU Aihua (Xiamen University,Xiamen 361005) |
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| Abstract: | User calls of the malloc function in the linux system is an indirect process of brk function, which the realization in the kernel is sys_brk function. We discusses the details of the memory management and allocation in the 2.6.11 version of linux kernel, focusing on an analysis of sys_brk function, and provides the two main flow chart of do_munmap and do_brk. Sys_brk function can be used to allocate space, that is, push up the border at the bottom of the dynamic allocation area , but also can be used to rel... |
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| Keywords: | malloc sys_brk do_brk do_munmap |
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