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thread_info和内核栈stack的学习...

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gatieme
2016-05-31 14:14:21 +08:00
parent c118ceecca
commit fb22fd0909
2 changed files with 71 additions and 27 deletions
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study/kernel/01-process/01-task/print_thread_info/Makefile
+11 -1
View File
@@ -1,6 +1,6 @@
ifneq ($(KERNELRELEASE),)
obj-m := print_vmarea.o
obj-m := print_thread_info.o
else
@@ -14,5 +14,15 @@ all:
clean:
make -C $(KERNELDIR) M=$(PWD) clean
insmod:
sudo insmod ./print_thread_info.ko
rmmod:
sudo rmmod print_thread_info
reinsmod:
make rmmod
make insmod
endif
study/kernel/01-process/01-task/print_thread_info/print_thread_info.c
+60 -26
View File
@@ -18,49 +18,83 @@
#endif
static int pid = 1;
static int PID = 1;
module_param(pid,int,0644);
module_param(PID, int, 0644);
static void print_thread_info_list(void)
{
struct task_struct *ptask;
struct pid *k;
struct vm_area_struct *tmp;
/* find tak by pid */
k = find_vpid(pid);
ptask = pid_task(k, PIDTYPE_PID);
printk("process:%s,pid:%d\n",p->comm,p->pid);
}
struct thread_info* get_threaf_info_by_task(struct task_struct *ptask)
struct thread_info* get_thread_info(struct task_struct *ptask)
{
printk(KERN_INFO "THREAD_SIZE : %dKB", THREAD_SIZE / 1024);
struct thread_info *threadinfo = NULL;
/* for the struct task_struct *task is the member of the struct thread_info
* we can find the threadinfo by task use container_of */
threadinfo = container_of(ptask, struct thread_info, task);
/* for the struct task_struct *task is the member of the struct thread_info
* we can find the threadinfo or stack by
*/
threadinfo = (struct thread_info *)ptask;
printk(KERN_INFO "thread_info : %p", threadinfo);
return threadinfo;
}
void print_thread_info(struct thread_info *pthreadinfo)
union thread_union* get_thread_union(struct thread_info *threadinfo)
{
printk(KERN_INFO "THREAD_SIZE : %d\n", THREAD_SZIE)
union thread_union *threadunion = NULL;
/* for the struct thread_info is the first member of the struct thread_info
* we can find the threadinfo or stack by thread_info
*/
threadunion = (union thread_union *)threadinfo;
printk(KERN_INFO "thread_union address : %p\n", threadunion);
threadunion = NULL;
threadunion = container_of(threadinfo, union thread_union, thread_info);
printk(KERN_INFO "thread_union address : %p\n", threadunion);
return threadunion;
}
unsigned long show_kstack(union thread_union *thread_union)
{
unsigned long *kstack = (unsigned long *)thread_union->stack;
unsigned length = THREAD_SIZE / sizeof(unsigned long) - 1;
unsigned long ksatck_start = kstack + sizeof(struct thread_info);
unsigned long kstack_end = kstack + length;
printk(KERN_INFO "sizeof(struct thread_info) : %d\n", sizeof(struct thread_info));
printk(KERN_INFO "kstack start : %p\n", kstack + sizeof(struct thread_info));
printk(KERN_INFO "kstack end : %p\n", kstack + length);
}
static void print_thread_info(int pid)
{
struct task_struct *ptask;
struct pid *k;
struct vm_area_struct *tmp;
struct thread_info *threadinfo = NULL;
union thread_union *threadunion = NULL;
/* find tak by pid */
k = find_vpid(pid);
ptask = pid_task(k, PIDTYPE_PID);
printk(KERN_INFO "process : %s, pid : %d\n", ptask->comm, ptask->pid);
printk(KERN_INFO "stack : %p\n", ptask->stack);
threadinfo = get_thread_info(ptask);
threadunion = get_thread_union(threadinfo);
show_kstack(threadunion);
}
static int __init print_thread_info_init(void)
{
print_thread_info(PID);
return 0;
}
static void __exit print_thread_info_exit(void)
{
printk(KERN_INFO "exit ---------------------!\n");