普通进程(Normal Process): 又称为分时进程,这类进程在Linux系统中遵循默认的分时调度策略,如CFS(Completely Fair Scheduler)。它们按照各自权重(nice值)和虚拟运行时间(vruntime)来获取CPU时间片。nice值可以在[-20, 19]范围内调整,数值越小,优先级越高,但总体来说,普通进程之间是公平共享CPU资源
Segmentationfault.blow_stack()atsetrlimit.c:44blow_stack();(gdb)print(void*)$esp$1=(void*)0xffffffffff7ff000(gdb)print(void*)orig_stack_pointer$2=(void*)0xffffc800(gdb)print0xffffc800-0xff7ff000$3=8378368//CurrentProcessStackSizeis8M...
Program received signalSIGSEGV,Segmentation fault.blow_stack()at setrlimit.c:44blow_stack();(gdb)print(void*)$esp $1=(void*)0xffffffffff7ff000(gdb)print(void*)orig_stack_pointer $2=(void*)0xffffc800(gdb)print0xffffc800-0xff7ff000$3=8378368// Current Process Stack Size is 8M 上面对进...
... 省略 ...//为进程创建 task_struct 结构,用父进程的资源填充 task_struct 信息p =copy_process(clone_flags, stack_start, stack_size, child_tidptr, NULL, trace, tls, NUMA_NO_NODE); ... 省略 ... } 随后会在 copy_process 函数中创建 task_struct 结构,并拷贝父进程的相关资源到新进程的 ...
blow_stack () at setrlimit.c:4 4 blow_stack(); (gdb) print (void *)$esp $1 = (void *) 0xffffffffff7ff000 (gdb) print (void *)orig_stack_pointer $2 = (void *) 0xffffc800 (gdb) print 0xffffc800-0xff7ff000 $3 = 8378368 // Current Process Stack Size is 8M ...
4 blow_stack(); (gdb) print (void *)$esp$1 = (void *) 0xffffffffff7ff000(gdb) print (void *)orig_stack_pointer$2 = (void *) 0xffffc800(gdb) print 0xffffc800-0xff7ff000$3 = 8378368 // Current Process Stack Size is 8M ...
*/ static struct task_struct *copy_process(unsigned long clone_flags, unsigned long stack_start, unsigned long stack_size, int __user *child_tidptr, struct pid *pid, int trace, unsigned long tls) { int retval; struct task_struct *p; retval = security_task_create(clone_flags); if (...
4blow_stack(); (gdb)print(void*)$esp $1=(void*)0xffffffffff7ff000 (gdb)print(void*)orig_stack_pointer $2=(void*)0xffffc800 (gdb)print0xffffc800-0xff7ff000 $3=8378368// Current Process Stack Size is 8M 1. 2. 3. 4.
在前边《5.1 内核如何划分用户态和内核态虚拟内存空间》小节中我们提到,内核在/arch/x86/include/asm/page_32_types.h文件中通过 TASK_SIZE 将进程虚拟内存空间和内核虚拟内存空间分割开来。 /* * User space process size: 3GB (default). */#defineTASK_SIZE__PAGE_OFFSET ...
static__latent_entropy struct task_struct*copy_process(unsigned long clone_flags,unsigned long stack_start,unsigned long stack_size,int __user*child_tidptr,struct pid*pid,int trace,unsigned long tls,int node){struct task_struct*p;// 创建 task_struct 结构p=dup_task_struct(current,node);......