函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\dumpstack.c Create Date:2022-07-27 08:34:09
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：show_trace_log_lvl

函数原型：void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs, unsigned long *stack, char *log_lvl)

返回类型：void

参数：

类型参数名称
struct task_struct *task
struct pt_regs *regs
unsigned long *stack
char *log_lvl
166  struct stack_info stack_info = {0}
167  visit_mask等于0
168  graph_idx等于0
169  bool partial = false
171  printk("%sCall Trace:\n", log_lvl)
173  unwind_start( & state, task, regs, stack)
174  stack等于如果stack否则get_stack_pointer(task, regs)
175  regs等于unwind_get_entry_regs( & state, & partial)
193  以stack循环
196  如果get_stack_info(stack, task, & stack_info, & visit_mask)则
203  stack等于 align the pointer to the (next) page boundary ((unsignedlong)stack)
204  如果get_stack_info(stack, task, & stack_info, & visit_mask)则退出
208  stack_name等于stack_type_name(type)
209  如果stack_name则printk("%s <%s>\n", log_lvl, stack_name)
212  如果regs则show_regs_if_on_stack( & stack_info, regs, partial)
225  以stack小于end循环
227  reliable等于0
228  addr等于Use READ_ONCE_NOCHECK() instead of READ_ONCE() if you need* to hide memory access from KASAN.( * stack)
229  ret_addr_p等于unwind_get_return_address_ptr( & state)
232  如果非__kernel_text_address(addr)则继续下一循环
239  如果regs且stack恒等于ip则转到:next
242  如果stack恒等于ret_addr_p则reliable等于1
254  real_addr等于ftrace_graph_ret_addr(task, & graph_idx, addr, stack)
256  如果real_addr不等于addr则printk_stack_address(addr, 0, log_lvl)
258  printk_stack_address(real_addr, reliable, log_lvl)
260  如果非reliable则继续下一循环
263  :
269  unwind_next_frame( & state)
272  regs等于unwind_get_entry_regs( & state, & partial)
273  如果regs则show_regs_if_on_stack( & stack_info, regs, partial)
277  如果stack_name则printk("%s </%s>\n", log_lvl, stack_name)
调用者
名称描述
show_stack
show_stack_regs
show_regs