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1// SPDX-License-Identifier: GPL-2.0
2#include <stdio.h>
3#include <stdlib.h>
4#include <string.h>
5#include "tests.h"
6#include "debug.h"
7
8#ifdef HAVE_LIBBPF_SUPPORT
9#include <bpf/libbpf.h>
10#include <util/llvm-utils.h>
11#include "llvm.h"
12static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
13{
14 struct bpf_object *obj;
15
16 obj = bpf_object__open_mem(obj_buf, obj_buf_sz, NULL);
17 if (libbpf_get_error(obj))
18 return TEST_FAIL;
19 bpf_object__close(obj);
20 return TEST_OK;
21}
22
23static struct {
24 const char *source;
25 const char *desc;
26 bool should_load_fail;
27} bpf_source_table[__LLVM_TESTCASE_MAX] = {
28 [LLVM_TESTCASE_BASE] = {
29 .source = test_llvm__bpf_base_prog,
30 .desc = "Basic BPF llvm compile",
31 },
32 [LLVM_TESTCASE_KBUILD] = {
33 .source = test_llvm__bpf_test_kbuild_prog,
34 .desc = "kbuild searching",
35 },
36 [LLVM_TESTCASE_BPF_PROLOGUE] = {
37 .source = test_llvm__bpf_test_prologue_prog,
38 .desc = "Compile source for BPF prologue generation",
39 },
40 [LLVM_TESTCASE_BPF_RELOCATION] = {
41 .source = test_llvm__bpf_test_relocation,
42 .desc = "Compile source for BPF relocation",
43 .should_load_fail = true,
44 },
45};
46
47int
48test_llvm__fetch_bpf_obj(void **p_obj_buf,
49 size_t *p_obj_buf_sz,
50 enum test_llvm__testcase idx,
51 bool force,
52 bool *should_load_fail)
53{
54 const char *source;
55 const char *desc;
56 const char *tmpl_old, *clang_opt_old;
57 char *tmpl_new = NULL, *clang_opt_new = NULL;
58 int err, old_verbose, ret = TEST_FAIL;
59
60 if (idx >= __LLVM_TESTCASE_MAX)
61 return TEST_FAIL;
62
63 source = bpf_source_table[idx].source;
64 desc = bpf_source_table[idx].desc;
65 if (should_load_fail)
66 *should_load_fail = bpf_source_table[idx].should_load_fail;
67
68 /*
69 * Skip this test if user's .perfconfig doesn't set [llvm] section
70 * and clang is not found in $PATH
71 */
72 if (!force && (!llvm_param.user_set_param &&
73 llvm__search_clang())) {
74 pr_debug("No clang, skip this test\n");
75 return TEST_SKIP;
76 }
77
78 /*
79 * llvm is verbosity when error. Suppress all error output if
80 * not 'perf test -v'.
81 */
82 old_verbose = verbose;
83 if (verbose == 0)
84 verbose = -1;
85
86 *p_obj_buf = NULL;
87 *p_obj_buf_sz = 0;
88
89 if (!llvm_param.clang_bpf_cmd_template)
90 goto out;
91
92 if (!llvm_param.clang_opt)
93 llvm_param.clang_opt = strdup("");
94
95 err = asprintf(&tmpl_new, "echo '%s' | %s%s", source,
96 llvm_param.clang_bpf_cmd_template,
97 old_verbose ? "" : " 2>/dev/null");
98 if (err < 0)
99 goto out;
100 err = asprintf(&clang_opt_new, "-xc %s", llvm_param.clang_opt);
101 if (err < 0)
102 goto out;
103
104 tmpl_old = llvm_param.clang_bpf_cmd_template;
105 llvm_param.clang_bpf_cmd_template = tmpl_new;
106 clang_opt_old = llvm_param.clang_opt;
107 llvm_param.clang_opt = clang_opt_new;
108
109 err = llvm__compile_bpf("-", p_obj_buf, p_obj_buf_sz);
110
111 llvm_param.clang_bpf_cmd_template = tmpl_old;
112 llvm_param.clang_opt = clang_opt_old;
113
114 verbose = old_verbose;
115 if (err)
116 goto out;
117
118 ret = TEST_OK;
119out:
120 free(tmpl_new);
121 free(clang_opt_new);
122 if (ret != TEST_OK)
123 pr_debug("Failed to compile test case: '%s'\n", desc);
124 return ret;
125}
126
127static int test__llvm(int subtest)
128{
129 int ret;
130 void *obj_buf = NULL;
131 size_t obj_buf_sz = 0;
132 bool should_load_fail = false;
133
134 if ((subtest < 0) || (subtest >= __LLVM_TESTCASE_MAX))
135 return TEST_FAIL;
136
137 ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
138 subtest, false, &should_load_fail);
139
140 if (ret == TEST_OK && !should_load_fail) {
141 ret = test__bpf_parsing(obj_buf, obj_buf_sz);
142 if (ret != TEST_OK) {
143 pr_debug("Failed to parse test case '%s'\n",
144 bpf_source_table[subtest].desc);
145 }
146 }
147 free(obj_buf);
148
149 return ret;
150}
151#endif //HAVE_LIBBPF_SUPPORT
152
153static int test__llvm__bpf_base_prog(struct test_suite *test __maybe_unused,
154 int subtest __maybe_unused)
155{
156#ifdef HAVE_LIBBPF_SUPPORT
157 return test__llvm(LLVM_TESTCASE_BASE);
158#else
159 pr_debug("Skip LLVM test because BPF support is not compiled\n");
160 return TEST_SKIP;
161#endif
162}
163
164static int test__llvm__bpf_test_kbuild_prog(struct test_suite *test __maybe_unused,
165 int subtest __maybe_unused)
166{
167#ifdef HAVE_LIBBPF_SUPPORT
168 return test__llvm(LLVM_TESTCASE_KBUILD);
169#else
170 pr_debug("Skip LLVM test because BPF support is not compiled\n");
171 return TEST_SKIP;
172#endif
173}
174
175static int test__llvm__bpf_test_prologue_prog(struct test_suite *test __maybe_unused,
176 int subtest __maybe_unused)
177{
178#ifdef HAVE_LIBBPF_SUPPORT
179 return test__llvm(LLVM_TESTCASE_BPF_PROLOGUE);
180#else
181 pr_debug("Skip LLVM test because BPF support is not compiled\n");
182 return TEST_SKIP;
183#endif
184}
185
186static int test__llvm__bpf_test_relocation(struct test_suite *test __maybe_unused,
187 int subtest __maybe_unused)
188{
189#ifdef HAVE_LIBBPF_SUPPORT
190 return test__llvm(LLVM_TESTCASE_BPF_RELOCATION);
191#else
192 pr_debug("Skip LLVM test because BPF support is not compiled\n");
193 return TEST_SKIP;
194#endif
195}
196
197
198static struct test_case llvm_tests[] = {
199#ifdef HAVE_LIBBPF_SUPPORT
200 TEST_CASE("Basic BPF llvm compile", llvm__bpf_base_prog),
201 TEST_CASE("kbuild searching", llvm__bpf_test_kbuild_prog),
202 TEST_CASE("Compile source for BPF prologue generation",
203 llvm__bpf_test_prologue_prog),
204 TEST_CASE("Compile source for BPF relocation", llvm__bpf_test_relocation),
205#else
206 TEST_CASE_REASON("Basic BPF llvm compile", llvm__bpf_base_prog, "not compiled in"),
207 TEST_CASE_REASON("kbuild searching", llvm__bpf_test_kbuild_prog, "not compiled in"),
208 TEST_CASE_REASON("Compile source for BPF prologue generation",
209 llvm__bpf_test_prologue_prog, "not compiled in"),
210 TEST_CASE_REASON("Compile source for BPF relocation",
211 llvm__bpf_test_relocation, "not compiled in"),
212#endif
213 { .name = NULL, }
214};
215
216struct test_suite suite__llvm = {
217 .desc = "LLVM search and compile",
218 .test_cases = llvm_tests,
219};
1// SPDX-License-Identifier: GPL-2.0
2#include <stdio.h>
3#include <stdlib.h>
4#include <string.h>
5#include <bpf/libbpf.h>
6#include <util/llvm-utils.h>
7#include "llvm.h"
8#include "tests.h"
9#include "debug.h"
10
11#ifdef HAVE_LIBBPF_SUPPORT
12static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
13{
14 struct bpf_object *obj;
15
16 obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, NULL);
17 if (libbpf_get_error(obj))
18 return TEST_FAIL;
19 bpf_object__close(obj);
20 return TEST_OK;
21}
22#else
23static int test__bpf_parsing(void *obj_buf __maybe_unused,
24 size_t obj_buf_sz __maybe_unused)
25{
26 pr_debug("Skip bpf parsing\n");
27 return TEST_OK;
28}
29#endif
30
31static struct {
32 const char *source;
33 const char *desc;
34 bool should_load_fail;
35} bpf_source_table[__LLVM_TESTCASE_MAX] = {
36 [LLVM_TESTCASE_BASE] = {
37 .source = test_llvm__bpf_base_prog,
38 .desc = "Basic BPF llvm compile",
39 },
40 [LLVM_TESTCASE_KBUILD] = {
41 .source = test_llvm__bpf_test_kbuild_prog,
42 .desc = "kbuild searching",
43 },
44 [LLVM_TESTCASE_BPF_PROLOGUE] = {
45 .source = test_llvm__bpf_test_prologue_prog,
46 .desc = "Compile source for BPF prologue generation",
47 },
48 [LLVM_TESTCASE_BPF_RELOCATION] = {
49 .source = test_llvm__bpf_test_relocation,
50 .desc = "Compile source for BPF relocation",
51 .should_load_fail = true,
52 },
53};
54
55int
56test_llvm__fetch_bpf_obj(void **p_obj_buf,
57 size_t *p_obj_buf_sz,
58 enum test_llvm__testcase idx,
59 bool force,
60 bool *should_load_fail)
61{
62 const char *source;
63 const char *desc;
64 const char *tmpl_old, *clang_opt_old;
65 char *tmpl_new = NULL, *clang_opt_new = NULL;
66 int err, old_verbose, ret = TEST_FAIL;
67
68 if (idx >= __LLVM_TESTCASE_MAX)
69 return TEST_FAIL;
70
71 source = bpf_source_table[idx].source;
72 desc = bpf_source_table[idx].desc;
73 if (should_load_fail)
74 *should_load_fail = bpf_source_table[idx].should_load_fail;
75
76 /*
77 * Skip this test if user's .perfconfig doesn't set [llvm] section
78 * and clang is not found in $PATH, and this is not perf test -v
79 */
80 if (!force && (verbose <= 0 &&
81 !llvm_param.user_set_param &&
82 llvm__search_clang())) {
83 pr_debug("No clang and no verbosive, skip this test\n");
84 return TEST_SKIP;
85 }
86
87 /*
88 * llvm is verbosity when error. Suppress all error output if
89 * not 'perf test -v'.
90 */
91 old_verbose = verbose;
92 if (verbose == 0)
93 verbose = -1;
94
95 *p_obj_buf = NULL;
96 *p_obj_buf_sz = 0;
97
98 if (!llvm_param.clang_bpf_cmd_template)
99 goto out;
100
101 if (!llvm_param.clang_opt)
102 llvm_param.clang_opt = strdup("");
103
104 err = asprintf(&tmpl_new, "echo '%s' | %s%s", source,
105 llvm_param.clang_bpf_cmd_template,
106 old_verbose ? "" : " 2>/dev/null");
107 if (err < 0)
108 goto out;
109 err = asprintf(&clang_opt_new, "-xc %s", llvm_param.clang_opt);
110 if (err < 0)
111 goto out;
112
113 tmpl_old = llvm_param.clang_bpf_cmd_template;
114 llvm_param.clang_bpf_cmd_template = tmpl_new;
115 clang_opt_old = llvm_param.clang_opt;
116 llvm_param.clang_opt = clang_opt_new;
117
118 err = llvm__compile_bpf("-", p_obj_buf, p_obj_buf_sz);
119
120 llvm_param.clang_bpf_cmd_template = tmpl_old;
121 llvm_param.clang_opt = clang_opt_old;
122
123 verbose = old_verbose;
124 if (err)
125 goto out;
126
127 ret = TEST_OK;
128out:
129 free(tmpl_new);
130 free(clang_opt_new);
131 if (ret != TEST_OK)
132 pr_debug("Failed to compile test case: '%s'\n", desc);
133 return ret;
134}
135
136int test__llvm(struct test *test __maybe_unused, int subtest)
137{
138 int ret;
139 void *obj_buf = NULL;
140 size_t obj_buf_sz = 0;
141 bool should_load_fail = false;
142
143 if ((subtest < 0) || (subtest >= __LLVM_TESTCASE_MAX))
144 return TEST_FAIL;
145
146 ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
147 subtest, false, &should_load_fail);
148
149 if (ret == TEST_OK && !should_load_fail) {
150 ret = test__bpf_parsing(obj_buf, obj_buf_sz);
151 if (ret != TEST_OK) {
152 pr_debug("Failed to parse test case '%s'\n",
153 bpf_source_table[subtest].desc);
154 }
155 }
156 free(obj_buf);
157
158 return ret;
159}
160
161int test__llvm_subtest_get_nr(void)
162{
163 return __LLVM_TESTCASE_MAX;
164}
165
166const char *test__llvm_subtest_get_desc(int subtest)
167{
168 if ((subtest < 0) || (subtest >= __LLVM_TESTCASE_MAX))
169 return NULL;
170
171 return bpf_source_table[subtest].desc;
172}