// SPDX-License-Identifier: GPL-2.0
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#include <stdio.h>
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#include <bpf/libbpf.h>
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#include <util/llvm-utils.h>
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#include <util/cache.h>
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#include "llvm.h"
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#include "tests.h"
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#include "debug.h"
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#include "util.h"
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#ifdef HAVE_LIBBPF_SUPPORT
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static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
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{
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struct bpf_object *obj;
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obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, NULL);
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if (libbpf_get_error(obj))
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return TEST_FAIL;
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bpf_object__close(obj);
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return TEST_OK;
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}
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#else
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static int test__bpf_parsing(void *obj_buf __maybe_unused,
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size_t obj_buf_sz __maybe_unused)
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{
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pr_debug("Skip bpf parsing\n");
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return TEST_OK;
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}
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#endif
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static struct {
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const char *source;
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const char *desc;
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bool should_load_fail;
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} bpf_source_table[__LLVM_TESTCASE_MAX] = {
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[LLVM_TESTCASE_BASE] = {
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.source = test_llvm__bpf_base_prog,
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.desc = "Basic BPF llvm compile",
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},
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[LLVM_TESTCASE_KBUILD] = {
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.source = test_llvm__bpf_test_kbuild_prog,
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.desc = "kbuild searching",
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},
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[LLVM_TESTCASE_BPF_PROLOGUE] = {
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.source = test_llvm__bpf_test_prologue_prog,
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.desc = "Compile source for BPF prologue generation",
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},
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[LLVM_TESTCASE_BPF_RELOCATION] = {
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.source = test_llvm__bpf_test_relocation,
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.desc = "Compile source for BPF relocation",
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.should_load_fail = true,
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},
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};
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int
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test_llvm__fetch_bpf_obj(void **p_obj_buf,
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size_t *p_obj_buf_sz,
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enum test_llvm__testcase idx,
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bool force,
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bool *should_load_fail)
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{
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const char *source;
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const char *desc;
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const char *tmpl_old, *clang_opt_old;
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char *tmpl_new = NULL, *clang_opt_new = NULL;
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int err, old_verbose, ret = TEST_FAIL;
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if (idx >= __LLVM_TESTCASE_MAX)
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return TEST_FAIL;
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source = bpf_source_table[idx].source;
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desc = bpf_source_table[idx].desc;
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if (should_load_fail)
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*should_load_fail = bpf_source_table[idx].should_load_fail;
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/*
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* Skip this test if user's .perfconfig doesn't set [llvm] section
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* and clang is not found in $PATH, and this is not perf test -v
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*/
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if (!force && (verbose <= 0 &&
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!llvm_param.user_set_param &&
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llvm__search_clang())) {
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pr_debug("No clang and no verbosive, skip this test\n");
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return TEST_SKIP;
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}
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/*
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* llvm is verbosity when error. Suppress all error output if
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* not 'perf test -v'.
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*/
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old_verbose = verbose;
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if (verbose == 0)
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verbose = -1;
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*p_obj_buf = NULL;
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*p_obj_buf_sz = 0;
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if (!llvm_param.clang_bpf_cmd_template)
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goto out;
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if (!llvm_param.clang_opt)
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llvm_param.clang_opt = strdup("");
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err = asprintf(&tmpl_new, "echo '%s' | %s%s", source,
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llvm_param.clang_bpf_cmd_template,
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old_verbose ? "" : " 2>/dev/null");
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if (err < 0)
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goto out;
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err = asprintf(&clang_opt_new, "-xc %s", llvm_param.clang_opt);
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if (err < 0)
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goto out;
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tmpl_old = llvm_param.clang_bpf_cmd_template;
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llvm_param.clang_bpf_cmd_template = tmpl_new;
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clang_opt_old = llvm_param.clang_opt;
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llvm_param.clang_opt = clang_opt_new;
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err = llvm__compile_bpf("-", p_obj_buf, p_obj_buf_sz);
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llvm_param.clang_bpf_cmd_template = tmpl_old;
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llvm_param.clang_opt = clang_opt_old;
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verbose = old_verbose;
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if (err)
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goto out;
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ret = TEST_OK;
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out:
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free(tmpl_new);
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free(clang_opt_new);
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if (ret != TEST_OK)
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pr_debug("Failed to compile test case: '%s'\n", desc);
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return ret;
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}
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int test__llvm(struct test *test __maybe_unused, int subtest)
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{
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int ret;
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void *obj_buf = NULL;
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size_t obj_buf_sz = 0;
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bool should_load_fail = false;
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if ((subtest < 0) || (subtest >= __LLVM_TESTCASE_MAX))
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return TEST_FAIL;
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ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
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subtest, false, &should_load_fail);
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if (ret == TEST_OK && !should_load_fail) {
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ret = test__bpf_parsing(obj_buf, obj_buf_sz);
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if (ret != TEST_OK) {
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pr_debug("Failed to parse test case '%s'\n",
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bpf_source_table[subtest].desc);
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}
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}
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free(obj_buf);
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return ret;
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}
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int test__llvm_subtest_get_nr(void)
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{
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return __LLVM_TESTCASE_MAX;
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}
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const char *test__llvm_subtest_get_desc(int subtest)
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{
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if ((subtest < 0) || (subtest >= __LLVM_TESTCASE_MAX))
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return NULL;
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return bpf_source_table[subtest].desc;
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}
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