valgrind memcheck Fehler einen String-Speicher

Question

Lauf mein Programm Zuweisung mit ich diesen Fehler:

==3205== Invalid write of size 8 
==3205== at 0x40167C: push (load.c:75) 
==3205== by 0x401725: load_tetrimino (load.c:112) 
==3205== by 0x40112F: main (main.c:130) 
==3205== Address 0x544e718 is 24 bytes after a block of size 16 in arena "client" 
==3205== 

valgrind: m_mallocfree.c:303 (get_bszB_as_is): Assertion 'bszB_lo == bszB_hi' failed. valgrind: Heap block lo/hi size mismatch: lo = 80, hi 
= 88401728. This is probably caused by your program erroneously writing past the end of a heap block and corrupting heap metadata. If you fix any invalid writes reported by Memcheck, this assertion failure will probably go away. Please try that before reporting this as a bug. 


host stacktrace: 
==3205== at 0x38082F78: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) 
==3205== by 0x38083094: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) 
==3205== by 0x38083221: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) 
==3205== by 0x380909D4: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) 
==3205== by 0x3807C683: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) 
==3205== by 0x3807AF03: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) 
==3205== by 0x3807F13A: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) 
==3205== by 0x3807A49A: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) 
==3205== by 0x38057FEE: ??? (in /usr/lib/valgrind/memcheck-amd64-linux) 
==3205== by 0x802C8C764: ??? 
==3205== by 0x802BA9F2F: ??? 
==3205== by 0x8020082CF: ??? 
==3205== by 0x401674: push (load.c:75) 
==3205== by 0x8020082CF: ??? 
==3205== by 0x1BFF: ??? 
==3205== by 0x38C4F9FF: ??? 
==3205== by 0x804C2BFFF: ??? 
==3205== by 0x12C05: ??? 

sched status: running_tid=1 

Thread 1: status = VgTs_Runnable (lwpid 3205) 
==3205== at 0x401684: push (load.c:75) 
==3205== by 0x401725: load_tetrimino (load.c:112) 
==3205== by 0x40112F: main (main.c:130) 

Das Stück Code:

int        push(t_node **head, t_node **tail,          
            struct dirent *file)             
{                           
    t_node      *new;              
    if ((new = malloc(sizeof(t_node *))) == NULL)               
    return (1);                       
    if ((new->tetrimino.name = malloc(12 + my_strlen(file->d_name))) == NULL)        
    return (1);                       
    exit(0); 

Printing my_strlen (d_name) gibt keinen Fehler, so spielt es keine kommen aus diesem

Die Struktur:

typedef struct   s_tetrimino 
{                           
    int     id;                    
    int     sundial;                   
    int     color;                   
    int     height;                   
    int     width;                   
    int     end;                    
    char     **shape;                   
    t_coord    coord;                   
    char     *name;                   
}      t_tetrimino; 

Dank

Answer 1

Die Zuordnung

new = malloc(sizeof(t_node *)) 

Speicher für einen Knoten Zeiger zuordnet, aber dies

new = malloc(sizeof(*new)) 

zuordnet für einen Knoten struct Speicher.

EDIT: Wie dieser Code zeigt:

#include <stdio.h> 

typedef struct { 
    double a; 
    double b; 
    double c; 
} t_node; 

int main(void) 
{ 
    t_node *new; 
    printf("%zu\n", sizeof(t_node *)); 
    printf("%zu\n", sizeof(*new)); 
    return 0; 
} 

Programmausgang (32-Bit-Compiler)

4 
24