运行我的程序,我收到此错误:
==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)
这段代码:
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);
打印my_strlen(d_name)不会出现错误,因此它不会来自
结构:
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;
由于
答案 0 :(得分:2)
分配
new = malloc(sizeof(t_node *))
为节点指针分配内存,但是这个
new = malloc(sizeof(*new))
为一个节点 struct 分配内存。
编辑:正如此代码所示:
#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;
}
程序输出(32位编译器)
4
24