1.Uprobe-tracer: Uprobe-based Event Tracing uprobe支持通过二进制文件的偏移值添加attach,比如 Add a probe as a new uprobe event, write a new definition to uprobe_events as below (sets a uprobe at an offset of 0x4245c0 in the executable /bin/bash): echo 'p /bin/bash:0x4245c0' > ...
最后我们需要将这个字符串记录到哈希表中做留存,这里我们使用到了lookup_or_try_init函数,如果找到了对应的key就返回结果,否则初始化一下再进行返回。 接下来我们需要将这个函数挂载到strlen函数上: attach_uprobe 这里使用到了attach_uprobe函数,将count挂载到了c库的strlen函数上;如果我们想要挂载到一个可执行文件...
ATTACH_UPROBE_CHECKED(skel, lib, gnutls_record_recv, probe_SSL_rw_enter); ATTACH_URETPROBE_CHECKED(skel, lib, gnutls_record_recv, probe_SSL_read_exit); return0; } intattach_nss(struct sslsniff_bpf *skel,constchar*lib){ ATTACH_UPROBE_CHECKED(skel, lib, PR_Write, probe_SSL_rw_enter)...
* u[ret]probe/binary:function[+offset] * * binary can be an absolute/relative path or a filename; the latter is resolved to a * full binary path via bpf_program__attach_uprobe_opts. * * Specifying uprobe+ ensures we carry out strict matching; either "uprobe" must be * specified (...
self.b.attach_uprobe(name="c", sym_re=".*", fn_name="count")deftearDown(self):self.b.cleanup() 开发者ID:ColinIanKing,项目名称:bcc,代码行数:16,代码来源:test_probe_count.py 示例2: create_heap_allocation_probes # 需要导入模块: from bcc import BPF [as 别名]# 或者: from bcc.BPF ...
* auto-attach. */ SEC("uretprobe//bin/bash:readline") int BPF_KRETPROBE(printret, const void *ret) { char str[MAX_LINE_SIZE]; char comm[TASK_COMM_LEN]; u32 pid; if (!ret) return 0; bpf_get_current_comm(&comm, sizeof(comm)); ...
* auto-attach. */SEC("uretprobe//bin/bash:readline")intBPF_KRETPROBE(printret,constvoid*ret){char str[MAX_LINE_SIZE];char comm[TASK_COMM_LEN];u32 pid;if(!ret)return0;bpf_get_current_comm(&comm,sizeof(comm));pid=bpf_get_current_pid_tgid()>>32;bpf_probe_read_user_str(str,size...
* auto-attach. */ SEC("uretprobe//bin/bash:readline") intBPF_KRETPROBE(printret,constvoid*ret) { charstr[MAX_LINE_SIZE]; charcomm[TASK_COMM_LEN]; u32 pid; if(!ret) return0; bpf_get_current_comm(&comm,sizeof(comm)); pid = bpf_get_current_pid_tgid >>32; ...
uprobe的多连接支持是merged in bpf-next,但还没有发布。我希望它能进入Linux v6.6。对于较旧的内核,您将不得不依赖bpf_program__attach_uprobe:
Linux 内核从 3.5 版本开始引入了 uprobe 功能,它是一种用户态的动态追踪技术。Uprobe 允许在用户空间的应用程序中插入探测点,以便实时监控和跟踪程序的运行状态和行为,而无需修改或重新编译应用程序的源代码。 Uprobe 的工作原理如下: 在目标应用程序的特定指令位置设置探测点。当程序执行到该指令时,会触发探测点...