? How are malloc and free implemented in C?

Possible Duplicate: How do malloc() and free() work? I read somewhere that calling free twice using the same pointer argument causes undefined behavior. So how does free know how much memory it has
 ? function to free memory of 1D Array

This question already has an answer here: How do malloc() and free() work? 14 answers You're freeing it correct
 ? freeing memory using free()

This question already has an answer here: How do malloc() and free() work? 14 answers It deallocates the memory
 ? How does C free() work?

Possible Duplicate: How malloc() and free() work #include <stdio.h>#include <stdlib.h>int * alloc(){ int *p = (int *)calloc(5,4); printf("%d\n",p); return p;}int main(){ int *p
 ? C: malloc(), free() and then again malloc() does work same always?

I have tried to run this code in some different machines with different processor and main memory size. #include <stdio.h>#include <stdlib.h>int main(void){ // your code goes here in
 ? trying to free allocated memory generate heap error

I'm dealing with a strange errors in code which i wrote in c.this is the place where the error occur: char* firstChar = (char*) malloc(ONE_CHAR_STRING);if (!firstChar) { *result = MTM_OUT_OF_MEM
 ? Heap corruption while freeing memory

I'm struggling with this piece of code. As the name suggests, function should return array of strings that represents all rotations of a string given as a parameter.char **str_all_rotations(const char
 ? Heap corruption error while trying to free a two-dimentional array

My program receives a two-dimentional array of strings. After it does what it should do i try to free the memory allocated for the strings but i get a Heap corruption error when i try to do so.Here's
 ? Heap corruption when freeing allocated memory (C)

I'm allocating memory dynamically to maintain a list of items, but when trying to remove an item using free(), I get a memory heap corruption error. And I know this would be a lot easier to do in C++
 ? Heap corruption when freeing allocated memory (C)

I'm allocating memory dynamically to maintain a list of items, but when trying to remove an item using free(), I get a memory heap corruption error. And I know this would be a lot easier to do in C++
 ? Heap corruption when freeing allocated memory (C)

I'm allocating memory dynamically to maintain a list of items, but when trying to remove an item using free(), I get a memory heap corruption error. And I know this would be a lot easier to do in C++
 ? valgrind - Address ---- is 0 bytes after a block of size 8 alloc'd

First, I know similar questions have been asked. However, I'd like to have a more general simple question with really primitive C data types. So here it is.In main.c I call a function to populate tho
 ? SIGTRAP when freeing a three dimensional array in C

I am trying to free a three dimensional pointer array representing a bmp image and whle it compiles ok I get SIGTRAP signals in gdb when debugging. My error message is warning: HEAP[bmpsample.exe]:
 ? Heap corruption while freeing allocated memory in C

In an attempt to free up memory after a malloc command to prevent memory leaks, I am running into a heap corruption problem during runtime. My debug is telling me that my application is trying to wri
 ? Error with freeing 2D dynamically allocated memory

I have a problem where I try to free some 2D dynamically allocated memory which fails and crashes the cmd with no useful error message.#include<stdio.h>#include<stdlib.h>#include<time.h
 ? Error with freeing 2D dynamically allocated memory

I have a problem where I try to free some 2D dynamically allocated memory which fails and crashes the cmd with no useful error message.#include<stdio.h>#include<stdlib.h>#include<time.h

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