segment段，setjmp和longjmp

2024-05-20 12:57:49

目录

What Kinds of C Statements End Up in Which Segments

How the Segments of an Executable are Laid Out in Memory

Virtual Address Space Layout, Showing Shared Libraries

An Activation Record is Created at Runtime for Each Function Call

The following code shows an example of setjmp() and longjmp().

Jump to It!

What Kinds of C Statements End Up in Which Segments

How the Segments of an Executable are Laid Out in Memory

Virtual Address Space Layout, Showing Shared Libraries

An Activation Record is Created at Runtime for Each Function Call

The following code shows an example of setjmp() and longjmp().

#include <setjmp.h>
jmp_buf buf;
#include <setjmp.h>
banana() {printf("in banana()\n");longjmp(buf, 1);/*NOTREACHED*/printf("you'll never see this, because I longjmp'd");
}
main()
{if (setjmp(buf))printf("back in main\n");else {printf("first time through\n");banana();}
}

结果：

% a.out
first time through
in banana()
back in main

或者一种牛叉的方法：

switch(setjmp(jbuf))
{case 0:apple = *suspicious;break;case 1:printf("suspicious is indeed a bad pointer\n");break;default:die("unexpected value returned by setjmp");
}

Jump to It!

Take the source of a program you have already written and add setjmp/longjmp to it, so that on receiving some particular input it will start over again.

The header file <setjmp.h> needs to be included in any source file that uses setjmp or longjmp.

Like goto's, setjmp/longjmp can make it hard to understand and debug a program. They are best avoided except in the specific situations described.

segment段，setjmp和longjmp相关推荐

Linux学习之setjmp和longjmp函数
nsetjmp和longjmp函数实现函数之间的跳转(需包含头文件"setjmp.h"): 函数原型:int setjmp(jmp_buf env); void longjmp ...
setjmp()、longjmp() Linux Exception Handling/Error Handling、no-local goto
目录 1. 应用场景 2. Use Case Code Analysis 3. 和setjmp.longjmp有关的glibc and eglibc 2.5, 2.7, 2.13 - Buffer O ...
【转】浅析C语言的非局部跳转：setjmp和longjmp
转自 http://www.cnblogs.com/lienhua34/archive/2012/04/22/2464859.html C语言中有一个goto语句,其可以结合标号实现函数内部的任意跳转 ...
利用C语言中的setjmp和longjmp，来实现异常捕获和协程
一.前言二.函数语法介绍与 goto 语句比较与 fork 函数比较与 Python 语言中的 yield/resume 比较三.利用 setjmp/longjmp 实现异常捕获四.利用 ...
linux C下的setjmp与longjmp介绍
setjmp和longjmp是C语言独有的,只有将它们结合起来使用,才能达到程序控制流有效转移的目的,按照程序员的预先设计的意图,去实现对程序中可能出现的异常进行集中处理. 先来看一下这两个函数的定义 ...
setjmp 与 longjmp
setjmp和longjmp是C语言独有的,只有将它们结合起来使用,才能达到程序控制流有效转移的目的,按照程序员的预先设计的意图,去实现对程序中可能出现的异常进行集中处理. 先来看一下这两个函数的定义 ...
setjmp and longjmp
setjmp, sigsetjmp - save stack context for nonlocal goto 1.作用 C中我们不能goto一个其他函数离得label,我们必须使用setjmp和l ...
浅析C语言的非局部跳转：setjmp和longjmp
浅析C语言的非局部跳转:setjmp和longjmp 作者:李恩华写于2012.4.22日凌晨西甲国家德比之前 C语言中有一个goto语句,其可以结合标号实现函数内部的任意跳转(通常情况下,很多人 ...
递归和函数栈与setjmp和longjmp的关系
递归每执行一次都会释放一次函数栈 setjmp 记录函数栈的栈顶 longjmp 寻找函数栈的栈顶如果longjmp找到了他要寻找的函数栈顶调用setjmp的函数栈不会被释放所以setjmp 和 ...

最新文章

热门文章