test_uprobe_autoattach.c (1649B)
1// SPDX-License-Identifier: GPL-2.0 2/* Copyright (c) 2022, Oracle and/or its affiliates. */ 3 4#include "vmlinux.h" 5 6#include <bpf/bpf_core_read.h> 7#include <bpf/bpf_helpers.h> 8#include <bpf/bpf_tracing.h> 9 10int uprobe_byname_parm1 = 0; 11int uprobe_byname_ran = 0; 12int uretprobe_byname_rc = 0; 13int uretprobe_byname_ran = 0; 14size_t uprobe_byname2_parm1 = 0; 15int uprobe_byname2_ran = 0; 16char *uretprobe_byname2_rc = NULL; 17int uretprobe_byname2_ran = 0; 18 19int test_pid; 20 21/* This program cannot auto-attach, but that should not stop other 22 * programs from attaching. 23 */ 24SEC("uprobe") 25int handle_uprobe_noautoattach(struct pt_regs *ctx) 26{ 27 return 0; 28} 29 30SEC("uprobe//proc/self/exe:autoattach_trigger_func") 31int handle_uprobe_byname(struct pt_regs *ctx) 32{ 33 uprobe_byname_parm1 = PT_REGS_PARM1_CORE(ctx); 34 uprobe_byname_ran = 1; 35 return 0; 36} 37 38SEC("uretprobe//proc/self/exe:autoattach_trigger_func") 39int handle_uretprobe_byname(struct pt_regs *ctx) 40{ 41 uretprobe_byname_rc = PT_REGS_RC_CORE(ctx); 42 uretprobe_byname_ran = 2; 43 return 0; 44} 45 46 47SEC("uprobe/libc.so.6:malloc") 48int handle_uprobe_byname2(struct pt_regs *ctx) 49{ 50 int pid = bpf_get_current_pid_tgid() >> 32; 51 52 /* ignore irrelevant invocations */ 53 if (test_pid != pid) 54 return 0; 55 uprobe_byname2_parm1 = PT_REGS_PARM1_CORE(ctx); 56 uprobe_byname2_ran = 3; 57 return 0; 58} 59 60SEC("uretprobe/libc.so.6:malloc") 61int handle_uretprobe_byname2(struct pt_regs *ctx) 62{ 63 int pid = bpf_get_current_pid_tgid() >> 32; 64 65 /* ignore irrelevant invocations */ 66 if (test_pid != pid) 67 return 0; 68 uretprobe_byname2_rc = (char *)PT_REGS_RC_CORE(ctx); 69 uretprobe_byname2_ran = 4; 70 return 0; 71} 72 73char _license[] SEC("license") = "GPL";