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