f3be6faa |
1 | /* test-mark.c |
2 | * |
3 | */ |
4 | |
5 | #include <linux/module.h> |
6 | #include <linux/proc_fs.h> |
7 | #include <linux/sched.h> |
8 | #include <linux/timex.h> |
9 | #include <linux/marker.h> |
10 | #include <asm/ptrace.h> |
db68aac5 |
11 | #include <asm/system.h> |
12 | |
f3be6faa |
13 | static void noinline test2(const struct marker *mdata, |
14 | void *call_private, ...) |
15 | { |
f175e050 |
16 | unsigned char *ins = __builtin_return_address(0) - 5; |
17 | #if 0 |
f3be6faa |
18 | /* not called */ |
f175e050 |
19 | printk("ip %p\n", __builtin_return_address(0)); |
20 | printk("prev_ins %hX %hX %hX %hX %hX\n", |
21 | ins[0], ins[1], ins[2], ins[3], ins[4]); |
22 | #endif //0 |
23 | ins[0] = 0x90; |
97c6afe7 |
24 | ins[1] = 0x8d; |
25 | ins[2] = 0x74; |
26 | ins[3] = 0x26; |
27 | ins[4] = 0x00; |
f3be6faa |
28 | } |
29 | |
30 | /* |
31 | * Generic marker flavor always available. |
32 | * Note : the empty asm volatile with read constraint is used here instead of a |
33 | * "used" attribute to fix a gcc 4.1.x bug. |
34 | * Make sure the alignment of the structure in the __markers section will |
35 | * not add unwanted padding between the beginning of the section and the |
36 | * structure. Force alignment to the same alignment as the section start. |
37 | */ |
38 | #define __my_trace_mark(generic, name, call_private, format, args...) \ |
39 | do { \ |
40 | static const char __mstrtab_##name[] \ |
41 | __attribute__((section("__markers_strings"))) \ |
42 | = #name "\0" format; \ |
43 | static struct marker __mark_##name \ |
44 | __attribute__((section("__markers"), aligned(8))) = \ |
45 | { __mstrtab_##name, &__mstrtab_##name[sizeof(#name)], \ |
46 | 0, 0, marker_probe_cb, \ |
47 | { __mark_empty_function, NULL}, NULL }; \ |
48 | __mark_check_format(format, ## args); \ |
49 | if (!generic) { \ |
50 | if (unlikely(imv_read(__mark_##name.state))) \ |
51 | test2 \ |
52 | (&__mark_##name, call_private, \ |
53 | ## args); \ |
54 | } else { \ |
55 | if (unlikely(_imv_read(__mark_##name.state))) \ |
56 | test2 \ |
57 | (&__mark_##name, call_private, \ |
58 | ## args); \ |
59 | } \ |
60 | } while (0) |
61 | |
62 | //asm volatile (""); |
63 | struct proc_dir_entry *pentry = NULL; |
64 | |
562710d7 |
65 | int temp __cacheline_aligned = 10; |
66 | |
f3be6faa |
67 | static inline void test(unsigned long arg, unsigned long arg2) |
68 | { |
64242d95 |
69 | #ifdef CACHEFLUSH |
db68aac5 |
70 | wbinvd(); |
64242d95 |
71 | #endif |
562710d7 |
72 | temp = (temp + 60) << 10; |
f3be6faa |
73 | //asm volatile (""); |
74 | //__my_trace_mark(1, kernel_debug_test, NULL, "%d %d %ld %ld", 2, current->pid, arg, arg2); |
75 | test2(NULL, NULL, 2, current->pid, arg, arg2); |
76 | //__my_trace_mark(0, kernel_debug_test, NULL, "%d %d %ld %ld", 2, current->pid, arg, arg2); |
77 | } |
78 | |
79 | static int my_open(struct inode *inode, struct file *file) |
80 | { |
81 | unsigned int i; |
82 | cycles_t cycles1, cycles2; |
83 | unsigned long flags; |
84 | |
85 | local_irq_save(flags); |
86 | rdtsc_barrier(); |
87 | cycles1 = get_cycles(); |
88 | rdtsc_barrier(); |
3a9fa119 |
89 | for(i=0; i<200; i++) { |
90 | test(i, i); |
91 | test(i, i); |
92 | test(i, i); |
93 | test(i, i); |
94 | test(i, i); |
95 | test(i, i); |
96 | test(i, i); |
97 | test(i, i); |
98 | test(i, i); |
f3be6faa |
99 | test(i, i); |
100 | } |
101 | rdtsc_barrier(); |
102 | cycles2 = get_cycles(); |
103 | rdtsc_barrier(); |
104 | local_irq_restore(flags); |
105 | printk("cycles : %llu\n", cycles2-cycles1); |
106 | return -EPERM; |
107 | } |
108 | |
109 | |
110 | static struct file_operations my_operations = { |
111 | .open = my_open, |
112 | }; |
113 | |
114 | int init_module(void) |
115 | { |
116 | pentry = create_proc_entry("testmark", 0444, NULL); |
117 | if (pentry) |
118 | pentry->proc_fops = &my_operations; |
119 | |
120 | return 0; |
121 | } |
122 | |
123 | void cleanup_module(void) |
124 | { |
125 | remove_proc_entry("testmark", NULL); |
126 | } |
127 | |
128 | MODULE_LICENSE("GPL"); |
129 | MODULE_AUTHOR("Mathieu Desnoyers"); |
130 | MODULE_DESCRIPTION("Marker Test"); |
64242d95 |
131 | MODULE_VERSION("1.0"); |
f3be6faa |
132 | |