1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
#include <stdio.h>
#include <bpf/libbpf.h>
#include <util/llvm-utils.h>
#include <util/cache.h>
#include "llvm.h"
#include "tests.h"
#include "debug.h"
#include "util.h"
#ifdef HAVE_LIBBPF_SUPPORT
static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
{
struct bpf_object *obj;
obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, NULL);
if (libbpf_get_error(obj))
return TEST_FAIL;
bpf_object__close(obj);
return TEST_OK;
}
#else
static int test__bpf_parsing(void *obj_buf __maybe_unused,
size_t obj_buf_sz __maybe_unused)
{
pr_debug("Skip bpf parsing\n");
return TEST_OK;
}
#endif
static struct {
const char *source;
const char *desc;
bool should_load_fail;
} bpf_source_table[__LLVM_TESTCASE_MAX] = {
[LLVM_TESTCASE_BASE] = {
.source = test_llvm__bpf_base_prog,
.desc = "Basic BPF llvm compile",
},
[LLVM_TESTCASE_KBUILD] = {
.source = test_llvm__bpf_test_kbuild_prog,
.desc = "kbuild searching",
},
[LLVM_TESTCASE_BPF_PROLOGUE] = {
.source = test_llvm__bpf_test_prologue_prog,
.desc = "Compile source for BPF prologue generation",
},
[LLVM_TESTCASE_BPF_RELOCATION] = {
.source = test_llvm__bpf_test_relocation,
.desc = "Compile source for BPF relocation",
.should_load_fail = true,
},
};
int
test_llvm__fetch_bpf_obj(void **p_obj_buf,
size_t *p_obj_buf_sz,
enum test_llvm__testcase idx,
bool force,
bool *should_load_fail)
{
const char *source;
const char *desc;
const char *tmpl_old, *clang_opt_old;
char *tmpl_new = NULL, *clang_opt_new = NULL;
int err, old_verbose, ret = TEST_FAIL;
if (idx >= __LLVM_TESTCASE_MAX)
return TEST_FAIL;
source = bpf_source_table[idx].source;
desc = bpf_source_table[idx].desc;
if (should_load_fail)
*should_load_fail = bpf_source_table[idx].should_load_fail;
/*
* Skip this test if user's .perfconfig doesn't set [llvm] section
* and clang is not found in $PATH, and this is not perf test -v
*/
if (!force && (verbose <= 0 &&
!llvm_param.user_set_param &&
llvm__search_clang())) {
pr_debug("No clang and no verbosive, skip this test\n");
return TEST_SKIP;
}
/*
* llvm is verbosity when error. Suppress all error output if
* not 'perf test -v'.
*/
old_verbose = verbose;
if (verbose == 0)
verbose = -1;
*p_obj_buf = NULL;
*p_obj_buf_sz = 0;
if (!llvm_param.clang_bpf_cmd_template)
goto out;
if (!llvm_param.clang_opt)
llvm_param.clang_opt = strdup("");
err = asprintf(&tmpl_new, "echo '%s' | %s%s", source,
llvm_param.clang_bpf_cmd_template,
old_verbose ? "" : " 2>/dev/null");
if (err < 0)
goto out;
err = asprintf(&clang_opt_new, "-xc %s", llvm_param.clang_opt);
if (err < 0)
goto out;
tmpl_old = llvm_param.clang_bpf_cmd_template;
llvm_param.clang_bpf_cmd_template = tmpl_new;
clang_opt_old = llvm_param.clang_opt;
llvm_param.clang_opt = clang_opt_new;
err = llvm__compile_bpf("-", p_obj_buf, p_obj_buf_sz);
llvm_param.clang_bpf_cmd_template = tmpl_old;
llvm_param.clang_opt = clang_opt_old;
verbose = old_verbose;
if (err)
goto out;
ret = TEST_OK;
out:
free(tmpl_new);
free(clang_opt_new);
if (ret != TEST_OK)
pr_debug("Failed to compile test case: '%s'\n", desc);
return ret;
}
int test__llvm(int subtest)
{
int ret;
void *obj_buf = NULL;
size_t obj_buf_sz = 0;
bool should_load_fail = false;
if ((subtest < 0) || (subtest >= __LLVM_TESTCASE_MAX))
return TEST_FAIL;
ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
subtest, false, &should_load_fail);
if (ret == TEST_OK && !should_load_fail) {
ret = test__bpf_parsing(obj_buf, obj_buf_sz);
if (ret != TEST_OK) {
pr_debug("Failed to parse test case '%s'\n",
bpf_source_table[subtest].desc);
}
}
free(obj_buf);
return ret;
}
int test__llvm_subtest_get_nr(void)
{
return __LLVM_TESTCASE_MAX;
}
const char *test__llvm_subtest_get_desc(int subtest)
{
if ((subtest < 0) || (subtest >= __LLVM_TESTCASE_MAX))
return NULL;
return bpf_source_table[subtest].desc;
}
|
