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1// SPDX-License-Identifier: GPL-2.0
2#include "vmlinux.h"
3#include <bpf/bpf_helpers.h>
4#include <bpf/bpf_tracing.h>
5#include <bpf/usdt.bpf.h>
6
7char _license[] SEC("license") = "GPL";
8
9__u64 uprobe_multi_func_1_addr = 0;
10__u64 uprobe_multi_func_2_addr = 0;
11__u64 uprobe_multi_func_3_addr = 0;
12
13__u64 uprobe_multi_func_1_result = 0;
14__u64 uprobe_multi_func_2_result = 0;
15__u64 uprobe_multi_func_3_result = 0;
16
17__u64 uretprobe_multi_func_1_result = 0;
18__u64 uretprobe_multi_func_2_result = 0;
19__u64 uretprobe_multi_func_3_result = 0;
20
21__u64 uprobe_multi_sleep_result = 0;
22
23int pid = 0;
24int child_pid = 0;
25int child_tid = 0;
26int child_pid_usdt = 0;
27int child_tid_usdt = 0;
28
29int expect_pid = 0;
30bool bad_pid_seen = false;
31bool bad_pid_seen_usdt = false;
32
33bool test_cookie = false;
34void *user_ptr = 0;
35
36static __always_inline bool verify_sleepable_user_copy(void)
37{
38 char data[9];
39
40 bpf_copy_from_user(data, sizeof(data), user_ptr);
41 return bpf_strncmp(data, sizeof(data), "test_data") == 0;
42}
43
44static void uprobe_multi_check(void *ctx, bool is_return, bool is_sleep)
45{
46 __u64 cur_pid_tgid = bpf_get_current_pid_tgid();
47 __u32 cur_pid;
48
49 cur_pid = cur_pid_tgid >> 32;
50 if (pid && cur_pid != pid)
51 return;
52
53 if (expect_pid && cur_pid != expect_pid)
54 bad_pid_seen = true;
55
56 child_pid = cur_pid_tgid >> 32;
57 child_tid = (__u32)cur_pid_tgid;
58
59 __u64 cookie = test_cookie ? bpf_get_attach_cookie(ctx) : 0;
60 __u64 addr = bpf_get_func_ip(ctx);
61
62#define SET(__var, __addr, __cookie) ({ \
63 if (addr == __addr && \
64 (!test_cookie || (cookie == __cookie))) \
65 __var += 1; \
66})
67
68 if (is_return) {
69 SET(uretprobe_multi_func_1_result, uprobe_multi_func_1_addr, 2);
70 SET(uretprobe_multi_func_2_result, uprobe_multi_func_2_addr, 3);
71 SET(uretprobe_multi_func_3_result, uprobe_multi_func_3_addr, 1);
72 } else {
73 SET(uprobe_multi_func_1_result, uprobe_multi_func_1_addr, 3);
74 SET(uprobe_multi_func_2_result, uprobe_multi_func_2_addr, 1);
75 SET(uprobe_multi_func_3_result, uprobe_multi_func_3_addr, 2);
76 }
77
78#undef SET
79
80 if (is_sleep && verify_sleepable_user_copy())
81 uprobe_multi_sleep_result += 1;
82}
83
84SEC("uprobe.multi//proc/self/exe:uprobe_multi_func_*")
85int uprobe(struct pt_regs *ctx)
86{
87 uprobe_multi_check(ctx, false, false);
88 return 0;
89}
90
91SEC("uretprobe.multi//proc/self/exe:uprobe_multi_func_*")
92int uretprobe(struct pt_regs *ctx)
93{
94 uprobe_multi_check(ctx, true, false);
95 return 0;
96}
97
98SEC("uprobe.multi.s//proc/self/exe:uprobe_multi_func_*")
99int uprobe_sleep(struct pt_regs *ctx)
100{
101 uprobe_multi_check(ctx, false, true);
102 return 0;
103}
104
105SEC("uretprobe.multi.s//proc/self/exe:uprobe_multi_func_*")
106int uretprobe_sleep(struct pt_regs *ctx)
107{
108 uprobe_multi_check(ctx, true, true);
109 return 0;
110}
111
112SEC("uprobe.multi//proc/self/exe:uprobe_multi_func_*")
113int uprobe_extra(struct pt_regs *ctx)
114{
115 /* we need this one just to mix PID-filtered and global uprobes */
116 return 0;
117}
118
119SEC("usdt")
120int usdt_pid(struct pt_regs *ctx)
121{
122 __u64 cur_pid_tgid = bpf_get_current_pid_tgid();
123 __u32 cur_pid;
124
125 cur_pid = cur_pid_tgid >> 32;
126 if (pid && cur_pid != pid)
127 return 0;
128
129 if (expect_pid && cur_pid != expect_pid)
130 bad_pid_seen_usdt = true;
131
132 child_pid_usdt = cur_pid_tgid >> 32;
133 child_tid_usdt = (__u32)cur_pid_tgid;
134
135 return 0;
136}
137
138SEC("usdt")
139int usdt_extra(struct pt_regs *ctx)
140{
141 /* we need this one just to mix PID-filtered and global USDT probes */
142 return 0;
143}
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/bpf.h>
3#include <bpf/bpf_helpers.h>
4#include <bpf/bpf_tracing.h>
5#include <stdbool.h>
6
7char _license[] SEC("license") = "GPL";
8
9__u64 uprobe_multi_func_1_addr = 0;
10__u64 uprobe_multi_func_2_addr = 0;
11__u64 uprobe_multi_func_3_addr = 0;
12
13__u64 uprobe_multi_func_1_result = 0;
14__u64 uprobe_multi_func_2_result = 0;
15__u64 uprobe_multi_func_3_result = 0;
16
17__u64 uretprobe_multi_func_1_result = 0;
18__u64 uretprobe_multi_func_2_result = 0;
19__u64 uretprobe_multi_func_3_result = 0;
20
21__u64 uprobe_multi_sleep_result = 0;
22
23int pid = 0;
24int child_pid = 0;
25
26bool test_cookie = false;
27void *user_ptr = 0;
28
29static __always_inline bool verify_sleepable_user_copy(void)
30{
31 char data[9];
32
33 bpf_copy_from_user(data, sizeof(data), user_ptr);
34 return bpf_strncmp(data, sizeof(data), "test_data") == 0;
35}
36
37static void uprobe_multi_check(void *ctx, bool is_return, bool is_sleep)
38{
39 child_pid = bpf_get_current_pid_tgid() >> 32;
40
41 if (pid && child_pid != pid)
42 return;
43
44 __u64 cookie = test_cookie ? bpf_get_attach_cookie(ctx) : 0;
45 __u64 addr = bpf_get_func_ip(ctx);
46
47#define SET(__var, __addr, __cookie) ({ \
48 if (addr == __addr && \
49 (!test_cookie || (cookie == __cookie))) \
50 __var += 1; \
51})
52
53 if (is_return) {
54 SET(uretprobe_multi_func_1_result, uprobe_multi_func_1_addr, 2);
55 SET(uretprobe_multi_func_2_result, uprobe_multi_func_2_addr, 3);
56 SET(uretprobe_multi_func_3_result, uprobe_multi_func_3_addr, 1);
57 } else {
58 SET(uprobe_multi_func_1_result, uprobe_multi_func_1_addr, 3);
59 SET(uprobe_multi_func_2_result, uprobe_multi_func_2_addr, 1);
60 SET(uprobe_multi_func_3_result, uprobe_multi_func_3_addr, 2);
61 }
62
63#undef SET
64
65 if (is_sleep && verify_sleepable_user_copy())
66 uprobe_multi_sleep_result += 1;
67}
68
69SEC("uprobe.multi//proc/self/exe:uprobe_multi_func_*")
70int uprobe(struct pt_regs *ctx)
71{
72 uprobe_multi_check(ctx, false, false);
73 return 0;
74}
75
76SEC("uretprobe.multi//proc/self/exe:uprobe_multi_func_*")
77int uretprobe(struct pt_regs *ctx)
78{
79 uprobe_multi_check(ctx, true, false);
80 return 0;
81}
82
83SEC("uprobe.multi.s//proc/self/exe:uprobe_multi_func_*")
84int uprobe_sleep(struct pt_regs *ctx)
85{
86 uprobe_multi_check(ctx, false, true);
87 return 0;
88}
89
90SEC("uretprobe.multi.s//proc/self/exe:uprobe_multi_func_*")
91int uretprobe_sleep(struct pt_regs *ctx)
92{
93 uprobe_multi_check(ctx, true, true);
94 return 0;
95}
96
97SEC("uprobe.multi//proc/self/exe:uprobe_multi_func_*")
98int uprobe_extra(struct pt_regs *ctx)
99{
100 return 0;
101}