c - segmentation fault on trying to allocate memory for a passed argument

Question

I am trying to make a python-like list in C and I tried the below code I identified the line at which the error occurs: *list[i] = (char*) malloc(strlen(buffer) + 1);.

But I have no idea how to fix it I am using gcc as a compiler and I am accounting for the null byte I also checked that realloc makes the needed memory to store the pointer that malloc will return but still the problem is still there for some reason.

One thing to note is that it actually works only if I called the function once which makes me doubt that my syntax in *list[i] isn't compiled the way I think it is which is to be equivalent to fileNames[i]

#include <stdio.h>
#include <stdint.h> 
#include <stdlib.h>
#include <string.h>

void dynamicListHandler(char ***list, char* buffer) {
    static int listSize = sizeof(char*);
    static int i = 0;

    *list[i] = (char*) malloc(strlen(buffer) + 1);
    strcpy(*list[i], buffer);   

    listSize += sizeof(char*);
    *list =  (char**) realloc(*list, listSize); 
    if(*list == NULL){ 
        printf("couldn't allocate the requested memory
");
        exit(-1);
    }

    i++;
}

int main() {
    char **fileNames;
    fileNames = (char**) malloc(sizeof(char*));

    dynamicListHandler(&fileNames, "Hello World1");
    dynamicListHandler(&fileNames, "Hello World2");
}

question from:https://stackoverflow.com/questions/65952137/segmentation-fault-on-trying-to-allocate-memory-for-a-passed-argument

Answer 1

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