notes: when kernel booting, call dump_stack() function , kernel maybe crash(hold)....... can't normal mount rootfs.....
kernel中,dump_stack打印调用栈,print_hex_dump打印一片内存,记录一下
1. 使用printk和dump_stack printk是内核中常用的日志输出函数,而dump_stack是一个宏,用于打印当前CPU上执行线程的内核堆栈跟踪信息。 c #include <linux/kernel.h> #include <linux/sched.h> #include <linux/stacktrace.h> void my_function(void) { printk(KERN_ERR "An error occur...
android::CallStack callstack; callstack.update(); callstack.log("LOG_TAG", ANDROID_LOG_INFO, "xxxx");//LOG_TAG是TAG;xxxx是backtrace的前缀; //或者 android::CallStack stack("my_test"); 三、kernel #include "linux/printk.h" //常用dump_stack,打印堆栈信息 dump_stack(); //或者可用WARN_...
在调试内核代码时,经常需要分析函数调用栈,比如func_a调用func_b,一般把func_a称之为caller,把func_b称为callee。有时候,我们需要知道哪个函数调用了func_b,也就是callee的调用者caller具体是谁。 内核在追踪caller,提供了一些很有用的函数,典型的就是dump_stack函数,此函数,可以帮助我们把函数的调用栈,打印到控...
Describe the bug kernel panic from linux_dump_stack() caused by drm_atomic_helper.c:621 while I was running Firefox and compiling kernel sources. relevant ports source path graphics/drm-fbsd13-kmod/work/drm-kmod-drm_v5.4.92_2/drivers/gpu...
而WARN_ON则是调用dump_stack,打印堆栈信息,不会OOPS。定义在中: #ifndef __WARN_TAINT #ifndef __ASSEMBLY__ extern void warn_slowpath_fmt(const char *file, const int line, const char *fmt, ...) __attribute__((format(printf, 3, 4))); ...
tcpdump(dump the traffic on a network)是 Linux 强大网络数据采集分析工具,它支持针对网络层、协议、主机、网络接口或端口的过滤,并提供 and、or、no t等逻辑原语来帮助你筛选出关注的信息。 tcpdump CLI 可以将涵盖整个 TCP/IP 协议族的所有数据包都完全截获下来提供分析,这是因为 tcpdump CLI 通过 PF_PACKE...
kmsg_dump_rewind_nolock+0xd9/0xd9 [ 0.000000] ? cgroup_init_early+0x2ce/0x474 [ 0.000000] ? start_kernel+0xc6/0x7ba [ 0.000000] ? thread_stack_cache_init+0x6/0x6 [ 0.000000] ? x86_family+0x5/0x20 [ 0.000000] ? load_ucode_bsp+0x49/0x22b [ 0.000000] ? secondary_startup_64...
We’ve published several blogs related to kernel core dumps, including how to generate them, how to estimate their size, how to analyze them with Drgn, and even how to manually extract stack function arguments from them. But have you ever wondered what’s really in a core dump? In this ...