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PODynamic memory allocation in C using realloc
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2013-01-26T18:20:14.333
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I have read the other SO question about using realloc to get a new pointer to the beginning of a bigger memory address space but I cant figure out what I am doing wrong. It prints a backtrace and memory dump. I later try to access strhldr but I dont think it even gets that far. <pre><code>char *strhldr = (char *)malloc(strsize); int chrctr = 0; if(chrctr == strsize - 3){ // when you get close strsize = strsize*2; //double size char *temp = realloc(strhldr, strsize); //make more room if(temp == NULL) printf("reallocate failed\n"); else{ strhldr = temp; free(temp); // removed same issue } } // Later attempt to add it to an array cmdargs[i] = strhldr; </code></pre> This is all within a while loop where chrctr and strsize get incremented complete code <pre><code> int argctr = 64; char **cmdargs = (char **) malloc(argctr * sizeof(char*)); char c = getchar(); int i = 0; while(c != '\n' && c != EOF){ //read through a String of stdin int strsize = 32; char *strhldr = (char *)malloc(strsize); char *strstarthldr = strhldr; if(c == ' ') c = getchar(); while(c != ' ' && c != '\n' && c != EOF){ int chrctr = 0; if(chrctr == strsize - 3){ // when you get close strsize = strsize*2; //double size char *temp = realloc(strhldr, strsize); //make more room if(temp == NULL) printf("reallocate failed\n"); else strhldr = temp; } //add that word to the array of strings strhldr[chrctr] = c; chrctr++; c = getchar(); } strhldr[charctr] = '\0'; //strhldr = strstarthldr; cmdargs[i] = strhldr; i++; } </code></pre>
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<c><memory><dynamic><allocation>
Title
Dynamic memory allocation in C using realloc
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