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 10 int uprobe_byname_parm1 = 0; 11 int uprobe_byname_ran = 0; 12 int uretprobe_byname_rc = 0; 13 int uretprobe_byname_ran = 0; 14 size_t uprobe_byname2_parm1 = 0; 15 int uprobe_byname2_ran = 0; 16 char *uretprobe_byname2_rc = NULL; 17 int uretprobe_byname2_ran = 0; 18 19 int test_pid; 20 21 /* This program cannot auto-attach, but that should not stop other 22 * programs from attaching. 23 */ 24 SEC("uprobe") 25 int handle_uprobe_noautoattach(struct pt_regs *ctx) 26 { 27 return 0; 28 } 29 30 SEC("uprobe//proc/self/exe:autoattach_trigger_func") 31 int 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 38 SEC("uretprobe//proc/self/exe:autoattach_trigger_func") 39 int 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 47 SEC("uprobe/libc.so.6:malloc") 48 int 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 60 SEC("uretprobe/libc.so.6:malloc") 61 int 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 73 char _license[] SEC("license") = "GPL"; 74