diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/perf/tests/llvm.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/tools/perf/tests/llvm.c b/tools/perf/tests/llvm.c new file mode 100644 index 000000000..a039f9319 --- /dev/null +++ b/tools/perf/tests/llvm.c @@ -0,0 +1,172 @@ +// SPDX-License-Identifier: GPL-2.0 +#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(struct test *test __maybe_unused, 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; +} |