int global; /* Uninitialized variable stored in bss*/ int main(void) { static int i; /* Uninitialized static variable stored in bss */ return 0; } 同样观察报告,发现BSS区增大到了16. [narendra@CentOS]$ gcc memory-layout.c -o memory-layout [narendra@CentOS]$ size memory-layout text data...
典型C Memory Layout 一个典型的C语言程序加载到内存中分为以下几个部分: 命令行参数 栈 堆 未初始化的数据段 有初始值的数据段 代码段 对于静态链接生成的可执行文件来说,基本就是由这六个部分组成;如果是动态链接,可能还有动态链接库加载区。关于动态链接,是一个很复杂的部分,哪天抽出时间来单独写一篇,本文...
#include<stdio.h>intglobal;/* Uninitialized variable stored in bss*/intmain(void){staticinti =100;/* Initialized static variable stored in DS*/return0; } [narendra@CentOS]$gcc memory-layout.c -o memory-layout[narendra@CentOS]$size memory-layouttext data bss dec hex filename 960 252 12 1...
1/*empty-main.c*/2#include <stdio.h>34intmain(void)5{6return0;7} 1/*hello-mac.c*/23#include <stdio.h>4#include <stdlib.h>56intg_init_2[2] = {1,2};/*.data*/7constintgc_int_3[3] = {1,2,3};/*.rodata*/8intg_initWithZero_4[4] = {0};/*.bss*/9intg_unInit_...
在多线程的程序里,每个线程都有其自己独立的栈,它们都共享一个堆。栈是面向线程的而堆是面向进程的。 程序、可执行文件与进程空间映射 ... ... 参考: C Memory Layout C语言中的内存布局 Stack and Heap 堆和栈的区别 C语言和内存 C语言的代码内存布局具体解释...
[narendra@CentOS]$ gcc memory-layout.c -o memory-layout [narendra@CentOS]$ size memory-layout text data bss dec hex filename 960 248 8 1216 4c0 memory-layout 2. Let us add one global variable in the program, now check the size of bss (highlighted in red color). ...
进程内存布局(Linux Memory Layout of a C Program) 传送门:https://www.jianshu.com/p/0cd8522b9598
MemoryLayout 源码 以本次研究的 MemoryLayout 为例, 它对应的源码如下所示: @frozen public enum MemoryLayout<T> { @_transparent public static var size: Swift.Int { @_transparent get { return Int(Builtin.sizeof(T.self)) } } @_transparent public static var stride: Swift.Int { @_transparent...
In all versions, a request for an Explicit layout (where you as the developer specify the field offsets for each and every field) is respected by both the JIT and by the marshaler.I make this distinction because the marshaled layout of a type is typically not the same as the stack or...
As you see, we have Text, Data, and BSS segments as part of the static layout. The shown sizes are in bytes. Now, let's compile the same code, example 4.1, in a different operating system. We have chosen macOS and we are going to use the clang compiler: $ clang ExtremeC_examples...