4:13 p.m.
tree: https://github.com/jimc/linux.git dd-drm-next
head: 1658a41496c77287b265b1de6dfe79a9a65fef09
commit: 03e1630af27012c72b182bcada6bb8f194ae6d75 [10/11] dyndbg: RFC add tracer facility
RFC
config: mips-allyesconfig (attached as .config)
compiler: mips-linux-gcc (GCC) 10.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/jimc/linux/commit/03e1630af27012c72b182bcada6bb8f194ae...
git remote add jimc https://github.com/jimc/linux.git
git fetch --no-tags jimc dd-drm-next
git checkout 03e1630af27012c72b182bcada6bb8f194ae6d75
# save the attached .config to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir
ARCH=mips SHELL=/bin/bash lib/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All errors (new ones prefixed by >>):
lib/test_dynamic_debug.c: In function 'do_register_test':
lib/test_dynamic_debug.c:185:49: warning: passing argument 1 of
'dynamic_debug_register_tracer' discards 'const' qualifier from pointer
target type [-Wdiscarded-qualifiers]
185 | match_count = dynamic_debug_register_tracer(tst->qry, tracer);
| ~~~^~~~~
In file included from include/linux/printk.h:456,
from include/linux/kernel.h:19,
from include/linux/list.h:9,
from include/linux/module.h:12,
from lib/test_dynamic_debug.c:18:
include/linux/dynamic_debug.h:297:41: note: expected 'char *' but argument is
of type 'const char *'
297 | int dynamic_debug_register_tracer(char *query, const char *mod,
| ~~~~~~^~~~~
> lib/test_dynamic_debug.c:185:16: error: too few arguments to
function 'dynamic_debug_register_tracer'
185 | match_count =
dynamic_debug_register_tracer(tst->qry, tracer);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/printk.h:456,
from include/linux/kernel.h:19,
from include/linux/list.h:9,
from include/linux/module.h:12,
from lib/test_dynamic_debug.c:18:
include/linux/dynamic_debug.h:297:5: note: declared here
297 | int dynamic_debug_register_tracer(char *query, const char *mod,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/test_dynamic_debug.c: In function 'test_dynamic_debug_init':
> lib/test_dynamic_debug.c:212:53: error: passing argument 2 of
'dynamic_debug_register_tracer' from incompatible pointer type
[-Werror=incompatible-pointer-types]
212 | "module test_dynamic_debug
func do_debugging +T", my_tracer);
| ^~~~~~~~~
| |
| int (*)(const char *, char
*, char *, struct va_format *)
In file included from include/linux/printk.h:456,
from include/linux/kernel.h:19,
from include/linux/list.h:9,
from include/linux/module.h:12,
from lib/test_dynamic_debug.c:18:
include/linux/dynamic_debug.h:297:60: note: expected 'const char *' but
argument is of type 'int (*)(const char *, char *, char *, struct va_format *)'
297 | int dynamic_debug_register_tracer(char *query, const char *mod,
| ~~~~~~~~~~~~^~~
lib/test_dynamic_debug.c:211:16: error: too few arguments to function
'dynamic_debug_register_tracer'
211 | match_count = dynamic_debug_register_tracer(
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/printk.h:456,
from include/linux/kernel.h:19,
from include/linux/list.h:9,
from include/linux/module.h:12,
from lib/test_dynamic_debug.c:18:
include/linux/dynamic_debug.h:297:5: note: declared here
297 | int dynamic_debug_register_tracer(char *query, const char *mod,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/test_dynamic_debug.c:217:35: error: passing argument 2 of
'dynamic_debug_register_tracer' from incompatible pointer type
[-Werror=incompatible-pointer-types]
217 | "module test_dynamic_debug +T", my_tracer);
| ^~~~~~~~~
| |
| int (*)(const char *, char *, char *, struct
va_format *)
In file included from include/linux/printk.h:456,
from include/linux/kernel.h:19,
from include/linux/list.h:9,
from include/linux/module.h:12,
from lib/test_dynamic_debug.c:18:
include/linux/dynamic_debug.h:297:60: note: expected 'const char *' but
argument is of type 'int (*)(const char *, char *, char *, struct va_format *)'
297 | int dynamic_debug_register_tracer(char *query, const char *mod,
| ~~~~~~~~~~~~^~~
lib/test_dynamic_debug.c:216:16: error: too few arguments to function
'dynamic_debug_register_tracer'
216 | match_count = dynamic_debug_register_tracer(
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/printk.h:456,
from include/linux/kernel.h:19,
from include/linux/list.h:9,
from include/linux/module.h:12,
from lib/test_dynamic_debug.c:18:
include/linux/dynamic_debug.h:297:5: note: declared here
297 | int dynamic_debug_register_tracer(char *query, const char *mod,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> lib/test_dynamic_debug.c:228:53: error: passing argument 2 of
'dynamic_debug_unregister_tracer' from incompatible pointer type
[-Werror=incompatible-pointer-types]
228 | "module test_dynamic_debug
func do_debugging -T", my_tracer);
| ^~~~~~~~~
| |
| int (*)(const char *, char
*, char *, struct va_format *)
In file included from include/linux/printk.h:456,
from include/linux/kernel.h:19,
from include/linux/list.h:9,
from include/linux/module.h:12,
from lib/test_dynamic_debug.c:18:
include/linux/dynamic_debug.h:309:68: note: expected 'const char *' but
argument is of type 'int (*)(const char *, char *, char *, struct va_format *)'
309 | int dynamic_debug_unregister_tracer(const char *query, const char *mod,
| ~~~~~~~~~~~~^~~
> lib/test_dynamic_debug.c:227:16: error: too few arguments to
function 'dynamic_debug_unregister_tracer'
227 | match_count =
dynamic_debug_unregister_tracer(
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/printk.h:456,
from include/linux/kernel.h:19,
from include/linux/list.h:9,
from include/linux/module.h:12,
from lib/test_dynamic_debug.c:18:
include/linux/dynamic_debug.h:309:5: note: declared here
309 | int dynamic_debug_unregister_tracer(const char *query, const char *mod,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/test_dynamic_debug.c:235:53: error: passing argument 2 of
'dynamic_debug_unregister_tracer' from incompatible pointer type
[-Werror=incompatible-pointer-types]
235 | "module test_dynamic_debug func do_debugging -T", my_tracer);
| ^~~~~~~~~
| |
| int (*)(const char *, char
*, char *, struct va_format *)
In file included from include/linux/printk.h:456,
from include/linux/kernel.h:19,
from include/linux/list.h:9,
from include/linux/module.h:12,
from lib/test_dynamic_debug.c:18:
include/linux/dynamic_debug.h:309:68: note: expected 'const char *' but
argument is of type 'int (*)(const char *, char *, char *, struct va_format *)'
309 | int dynamic_debug_unregister_tracer(const char *query, const char *mod,
| ~~~~~~~~~~~~^~~
lib/test_dynamic_debug.c:234:16: error: too few arguments to function
'dynamic_debug_unregister_tracer'
234 | match_count = dynamic_debug_unregister_tracer(
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/printk.h:456,
from include/linux/kernel.h:19,
from include/linux/list.h:9,
from include/linux/module.h:12,
from lib/test_dynamic_debug.c:18:
include/linux/dynamic_debug.h:309:5: note: declared here
309 | int dynamic_debug_unregister_tracer(const char *query, const char *mod,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At top level:
lib/test_dynamic_debug.c:181:13: warning: 'do_register_test' defined but not
used [-Wunused-function]
181 | static void do_register_test(struct register_test *tst, void *tracer)
| ^~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors
vim +/dynamic_debug_register_tracer +185 lib/test_dynamic_debug.c
18 #include <linux/module.h>
19
20 static int __bad_tracer;
21
22 static int trace_ct = 0;
23 static int test_ct = 0;
24 static int errors = 0;
25 static int verbose = 0;
26
27
28 module_param_named(use_bad_tracer, __bad_tracer, int, 0644);
29 MODULE_PARM_DESC(use_bad_tracer,
30 "use broken tracer, recursing with pr_debug\n"
31 "\tonly works at modprobe time\n");
32
33 static int (*my_tracer)(const char *decorator, char *prefix, char *label, struct
va_format *vaf);
34
35 static int good_tracer(const char *decorator, char *prefix, char *label, struct
va_format *vaf)
36 {
37 trace_ct++;
38 if (verbose)
39 pr_notice("my_tracer: %pV", vaf);
40 return 0;
41 }
42
43 static int bad_tracer(const char *decorator, char *prefix, char *label, struct
va_format *vaf)
44 {
45 /* dont try pr_debug, it recurses back here */
46 pr_debug("oops! recursion, crash?\n");
47 return 0;
48 }
49
50 static void pick_tracer(void)
51 {
52 if (__bad_tracer)
53 my_tracer = bad_tracer;
54 else
55 my_tracer = good_tracer;
56 }
57
58 static int expect_count(int want, const char *story)
59 {
60 test_ct++;
61 if (want != trace_ct) {
62 pr_err("expect_count: want %d, got %d: %s\n", want, trace_ct, story);
63 errors++;
64 trace_ct = 0;
65 return 1;
66 }
67 pr_info("pass %d, hits %d, on \"%s\"\n", test_ct, want,
story);
68 trace_ct = 0;
69 return 0;
70 }
71
72 /* call pr_debug (4 * reps) + 2 times, for tracer side-effects */
73 static void do_debugging(int reps)
74 {
75 int i;
76
77 pr_debug("Entry:\n");
78 pr_info(" do_debugging %d time(s)\n", reps);
79 for (i = 0; i < reps; i++) {
80 pr_debug("hi: %d\n", i);
81 pr_debug("mid: %d\n", i);
82 pr_debug("low: %d\n", i);
83 pr_debug("low:lower: %d subcategory test\n", i);
84 }
85 pr_debug("Exit:\n");
86 }
87
88 static void expect_matches(int want, int got, const char *story)
89 {
90 // todo: got <0 are errors, bubbled up
91 if (got != want)
92 pr_warn(" match_count wrong: want %d got %d %s\n", want, got, story);
93 else
94 pr_info(" ok: %d matches by \"%s\"\n", want, story);
95
96 // ? count errs ? separately ?
97 }
98
99 static int report(char *who)
100 {
101 if (errors)
102 pr_err("%s failed %d of %d tests\n", who, errors, test_ct);
103 else
104 pr_info("%s passed %d tests\n", who, test_ct);
105 return errors;
106 }
107
108 struct exec_test {
109 int matches;
110 int loops;
111 int hits;
112 const char *mod;
113 const char *qry;
114 };
115
116 static void do_exec_test(struct exec_test *tst)
117 {
118 int match_count;
119
120 match_count = dynamic_debug_exec_queries(tst->qry, tst->mod);
121 expect_matches(tst->matches, match_count, tst->qry);
122 do_debugging(tst->loops);
123 expect_count(tst->hits, tst->qry);
124 }
125
126 static const char my_mod[] = "test_dynamic_debug";
127
128 /* these tests rely on register stuff having been done ?? */
129 struct exec_test exec_tests[] = {
130
131 /* standard use is my_mod, for `modprobe $module dyndbg=+p` */
132
133 /* no modification probe */
134 { 6, 2, 0, my_mod, "func do_debugging +_" },
135
136 /* use original single string query style */
137 { 6, 3, 0, NULL, "module test_dynamic_debug func do_debugging -T" },
138
139 /* this is mildly preferred */
140 { 6, 3, 0, my_mod, "func do_debugging -T" },
141
142 /* enable all DUT */
143 { 6, 4, 18, my_mod, "func do_debugging +T" },
144
145 /* disable 1 call */
146 { 1, 4, 14, my_mod, "format '^hi:' -T" },
147
148 /* disable 1 call */
149 { 1, 4, 10, my_mod, "format '^mid:' -T" },
150
151 /* repeat same disable */
152 { 1, 4, 10, my_mod, "format '^mid:' -T" },
153
154 /* repeat same disable, diff run ct */
155 { 1, 5, 12, my_mod, "format '^mid:' -T" },
156
157 /* include subclass */
158 { 2, 4, 2, my_mod, "format '^low:' -T" },
159
160 /* re-disable, exclude subclass */
161 { 1, 4, 2, my_mod, "format '^low: ' -T" },
162
163 /* enable, exclude subclass */
164 { 1, 4, 6, my_mod, "format '^low: ' +T" },
165
166 /* enable the subclass */
167 { 1, 4, 10, my_mod, "format '^low:lower:' +T" },
168
169 /* enable the subclass */
170 { 1, 6, 14, my_mod, "format '^low:lower:' +T" },
171 };
172
173 struct register_test {
174 int matches;
175 int loops;
176 int hits;
177 // const char *mod; maybe should have
178 const char *qry;
179 };
180
181 static void do_register_test(struct register_test *tst, void *tracer)
182 {
183 int match_count;
184
185 match_count = dynamic_debug_register_tracer(tst->qry,
tracer);
186 expect_matches(tst->matches, match_count, tst->qry);
187 do_debugging(tst->loops);
188 expect_count(tst->hits, tst->qry);
189 }
190
191 /* these tests rely on register stuff having been done ?? */
192 struct register_test register_tests[] = {
193
194 { 6, 3, 0, "module test_dynamic_debug func do_debugging +T" },
195
196 { 11, 3, 0, "module test_dynamic_debug +T" },
197
198 };
199
200 static int __init test_dynamic_debug_init(void)
201 {
202 int match_count; /* rc from ddebug_exec_queries. meh. */
203 int i;
204
205 pick_tracer();
206
207 pr_debug("Entry:\n");
208 do_debugging(3);
209 expect_count(0, "nothing unless dyndbg=+T at modprobe");
210
211 match_count = dynamic_debug_register_tracer(
212 "module test_dynamic_debug func do_debugging +T",
my_tracer);
213 expect_matches(6, match_count,
214 "tracing do_debugging()s pr_debugs");
215
216 match_count = dynamic_debug_register_tracer(
217 "module test_dynamic_debug +T", my_tracer);
218 expect_matches(11, match_count,
219 "tracing whole module's pr_debugs");
220
221 do_debugging(2);
222 expect_count(10, "do_debugging 2 times after +T");
223
224 for (i = 0; i < ARRAY_SIZE(exec_tests); i++)
225 do_exec_test(&exec_tests[i]);
226
227 match_count = dynamic_debug_unregister_tracer(
228 "module test_dynamic_debug func do_debugging -T", my_tracer);
229 expect_matches(6, match_count,
230 "unregister do_debugging()s tracers");
231 do_debugging(4);
232 expect_count(0, "everything is off");
233
234 match_count = dynamic_debug_unregister_tracer(
235 "module test_dynamic_debug func do_debugging -T", my_tracer);
236
237 expect_matches(6, match_count,
238 "re-unregister, same count, not a change count");
239 report("init");
240 pr_debug("Exit:\n");
241 return 0;
242 }
243
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org