diff options
Diffstat (limited to 'kernel/tools/perf/tests/llvm.c')
| -rw-r--r-- | kernel/tools/perf/tests/llvm.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/kernel/tools/perf/tests/llvm.c b/kernel/tools/perf/tests/llvm.c new file mode 100644 index 000000000..bc4cf507c --- /dev/null +++ b/kernel/tools/perf/tests/llvm.c @@ -0,0 +1,170 @@ +#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" + +static int perf_config_cb(const char *var, const char *val, + void *arg __maybe_unused) +{ + return perf_default_config(var, val, arg); +} + +#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 (IS_ERR(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; +} bpf_source_table[__LLVM_TESTCASE_MAX] = { + [LLVM_TESTCASE_BASE] = { + .source = test_llvm__bpf_base_prog, + .desc = "Basic BPF llvm compiling test", + }, + [LLVM_TESTCASE_KBUILD] = { + .source = test_llvm__bpf_test_kbuild_prog, + .desc = "Test kbuild searching", + }, +}; + + +int +test_llvm__fetch_bpf_obj(void **p_obj_buf, + size_t *p_obj_buf_sz, + enum test_llvm__testcase index, + bool force) +{ + 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 (index >= __LLVM_TESTCASE_MAX) + return TEST_FAIL; + + source = bpf_source_table[index].source; + desc = bpf_source_table[index].desc; + + perf_config(perf_config_cb, NULL); + + /* + * 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(void) +{ + enum test_llvm__testcase i; + + for (i = 0; i < __LLVM_TESTCASE_MAX; i++) { + int ret; + void *obj_buf = NULL; + size_t obj_buf_sz = 0; + + ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz, + i, false); + + if (ret == TEST_OK) { + 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[i].desc); + } + free(obj_buf); + + switch (ret) { + case TEST_SKIP: + return TEST_SKIP; + case TEST_OK: + break; + default: + /* + * Test 0 is the basic LLVM test. If test 0 + * fail, the basic LLVM support not functional + * so the whole test should fail. If other test + * case fail, it can be fixed by adjusting + * config so don't report error. + */ + if (i == 0) + return TEST_FAIL; + else + return TEST_SKIP; + } + } + return TEST_OK; +} |