我在运行代码时一直收到此错误
ping:malloc.c:2372:sysmalloc:断言`(old_top ==(((mbinptr)(((char *)&((av) - > bins [((1) - 1)* 2 ])) - __builtin_offsetof(struct malloc_chunk,fd))))&& old_size == 0)|| ((unsigned long)(old_size)> =(unsigned long)(((__ builtin_offsetof(struct malloc_chunk,fd_nextsize))+((2 *(sizeof(size_t))) - 1))&〜((2 * (sizeof(size_t))) - 1)))&&((old_top) - > size& 0x1)&&((unsigned long)old_end& pagemask)== 0)'失败。
我的代码如下:
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <ucontext.h>
#include "mythread.h"
#define STACK 1024*64
ucontext_t init_thr, new_thr;
static int thread_id = 1;
struct _MyThreadStruct
{
ucontext_t ctxt;
int thr_id;
int states; // 1-Ready, 2-Running, 3-Blocked, 4-Blocked by all, 5-Exit
struct _MyThreadStruct *parent;
//struct threadList *children;
};
typedef struct _MyThreadStruct * _MyThread;
_MyThread currentthread;
struct threadList
{
_MyThread thr;
struct threadList *link;
};
struct threadList *front,*rear,*temp,*front1;
_MyThread frontelement();
void enq(_MyThread thr);
void deq();
void empty();
void create();
void queuesize();
int qSize = 0;
MyThread MyThreadCreate(void(*start_funct)(void *), void *args)
{
getcontext(&new_thr);
new_thr.uc_link = ¤tthread->ctxt;
new_thr.uc_stack.ss_sp = malloc(STACK);
new_thr.uc_stack.ss_size = STACK;
new_thr.uc_stack.ss_flags = 0;
makecontext(&new_thr, (void (*)(void)) start_funct,1,args);
_MyThread newthread = (_MyThread )malloc(sizeof(_MyThread));
newthread->ctxt = new_thr;
newthread->thr_id = thread_id++;
newthread->states = 1;
newthread->parent = currentthread;
//newthread->children = (struct threadList)malloc(sizeof(struct threadList));
enq(newthread);
return (MyThread)newthread;
}
void MyThreadYield()
{
enq(currentthread);
currentthread = frontelement();
deq();
queuesize();
setcontext(¤tthread->ctxt);
}
void MyThreadExit()
{
printf("in Exit");
}
/* Create an empty queue */
void create()
{
front = rear = NULL;
}
/* Returns queue size */
void queuesize()
{
printf("\nQueue size : %d", qSize);
}
/* Enqueing the queue */
void enq(_MyThread thr)
{
if (rear == NULL)
{
rear = (struct threadList *)malloc(1*sizeof(struct threadList));
rear->link = NULL;
rear->thr = thr;
front = rear;
}
else
{
temp = (struct threadList *)malloc(1*sizeof(struct threadList));
rear->link = temp;
temp->thr = thr;
temp->link = NULL;
rear = temp;
}
qSize++;
}
/* Dequeing the queue */
void deq()
{
front1 = front;
if (front1 == NULL)
{
printf("\nNo threads on queue");
return;
}
else
if (front1->link != NULL)
{
front1 = front1->link;
printf("\nDequed");
free(front);
front = front1;
}
else
{
printf("\nDequed");
free(front);
front = NULL;
rear = NULL;
}
qSize--;
}
/* Returns the front element of queue */
_MyThread frontelement()
{
if ((front != NULL) && (rear != NULL))
return(front->thr);
else
printf("\nQueue empty");
}
/* Display if queue is empty or not */
void empty()
{
if ((front == NULL) && (rear == NULL))
printf("\nQueue empty");
else
printf("\nQueue not empty");
}
void MyThreadInit (void(*start_funct)(void *), void *args)
{
getcontext(&init_thr);
init_thr.uc_link = 0;
init_thr.uc_stack.ss_sp = malloc(STACK);
init_thr.uc_stack.ss_size = STACK;
init_thr.uc_stack.ss_flags = 0;
makecontext(&init_thr, (void (*)(void)) start_funct,1,args);
printf("\n00000");
_MyThread initthread = (_MyThread)malloc(sizeof(_MyThread));
printf("\n11111");
initthread->ctxt = init_thr;
printf("\n22222");
initthread->thr_id = thread_id;
initthread->states = 2;
initthread->parent = NULL;
//initthread->children = (struct threadList)malloc(sizeof(struct threadList));
create();
currentthread = initthread;
setcontext(&initthread->ctxt);
}
我从一段单独的代码中调用了MyThreadInit。
失败了_MyThread initthread = (_MyThread)malloc(sizeof(_MyThread));
有人可以帮我解决问题吗?
答案 0 :(得分:1)
我在malloc中使用typedef _MyThread时遇到错误。我使用struct _MyThreadStruct代替它,它工作正常。需要查看typedef的事情。
代码:
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <ucontext.h>
#include "mythread.h"
#define STACK 1024*64
ucontext_t init_thr, new_thr;
static int thread_id = 1;
struct _MyThread
{
ucontext_t ctxt;
int thr_id;
int states; // 1-Ready, 2-Running, 3-Blocked, 4-Blocked by all, 5-Exit
struct _MyThread *parent;
//struct threadList *children;
};
struct _MyThread * currentthread;
struct threadList
{
struct _MyThread *thr;
struct threadList *link;
};
struct threadList *front,*rear,*temp,*front1;
struct _MyThread * frontelement();
void enq(struct _MyThread * thr);
void deq();
void empty();
void create();
void queuesize();
int qSize = 0;
MyThread MyThreadCreate(void(*start_funct)(void *), void *args)
{
getcontext(&new_thr);
new_thr.uc_link = ¤tthread->ctxt;
new_thr.uc_stack.ss_sp = malloc(STACK);
new_thr.uc_stack.ss_size = STACK;
new_thr.uc_stack.ss_flags = 0;
makecontext(&new_thr, (void (*)(void)) start_funct,1,args);
struct _MyThread * newthread = (struct _MyThread *)malloc(sizeof(struct _MyThread));
newthread->ctxt = new_thr;
newthread->thr_id = thread_id++;
newthread->states = 1;
newthread->parent = currentthread;
//newthread->children = (struct threadList)malloc(sizeof(struct threadList));
enq(newthread);
return (MyThread)newthread;
}
void MyThreadYield()
{
enq(currentthread);
currentthread = frontelement();
deq();
queuesize();
setcontext(¤tthread->ctxt);
}
void MyThreadExit()
{
printf("in Exit");
}
/* Create an empty queue */
void create()
{
front = rear = NULL;
}
/* Returns queue size */
void queuesize()
{
printf("\nQueue size : %d", qSize);
}
/* Enqueing the queue */
void enq(struct _MyThread * thr)
{
if (rear == NULL)
{
rear = (struct threadList *)malloc(1*sizeof(struct threadList));
rear->link = NULL;
rear->thr = thr;
front = rear;
}
else
{
temp = (struct threadList *)malloc(1*sizeof(struct threadList));
rear->link = temp;
temp->thr = thr;
temp->link = NULL;
rear = temp;
}
qSize++;
}
/* Dequeing the queue */
void deq()
{
front1 = front;
if (front1 == NULL)
{
printf("\nNo threads on queue");
return;
}
else
if (front1->link != NULL)
{
front1 = front1->link;
printf("\nDequed");
free(front);
front = front1;
}
else
{
printf("\nDequed");
free(front);
front = NULL;
rear = NULL;
}
qSize--;
}
/* Returns the front element of queue */
struct _MyThread * frontelement()
{
if ((front != NULL) && (rear != NULL))
return(front->thr);
else
printf("\nQueue empty");
}
/* Display if queue is empty or not */
void empty()
{
if ((front == NULL) && (rear == NULL))
printf("\nQueue empty");
else
printf("\nQueue not empty");
}
void MyThreadInit (void(*start_funct)(void *), void *args)
{
getcontext(&init_thr);
init_thr.uc_link = 0;
init_thr.uc_stack.ss_sp = malloc(STACK);
init_thr.uc_stack.ss_size = STACK;
init_thr.uc_stack.ss_flags = 0;
makecontext(&init_thr, (void (*)(void)) start_funct,1,args);
struct _MyThread * initthread = (struct _MyThread *)malloc(sizeof(struct _MyThread));
initthread->ctxt = init_thr;
initthread->thr_id = thread_id;
initthread->states = 2;
initthread->parent = NULL;
//initthread->children = (struct threadList)malloc(sizeof(struct threadList));
create();
currentthread = initthread;
setcontext(&initthread->ctxt);
}