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// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "tests.h"
#include "debug.h"
#ifdef HAVE_LIBBPF_SUPPORT
#include <bpf/libbpf.h>
#include <util/llvm-utils.h>
#include "llvm.h"
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;
}
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
*/
if (!force && (!llvm_param.user_set_param &&
llvm__search_clang())) {
pr_debug("No clang, 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;
}
static int test__llvm(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;
}
#endif //HAVE_LIBBPF_SUPPORT
static int test__llvm__bpf_base_prog(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
#ifdef HAVE_LIBBPF_SUPPORT
return test__llvm(LLVM_TESTCASE_BASE);
#else
pr_debug("Skip LLVM test because BPF support is not compiled\n");
return TEST_SKIP;
#endif
}
static int test__llvm__bpf_test_kbuild_prog(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
#ifdef HAVE_LIBBPF_SUPPORT
return test__llvm(LLVM_TESTCASE_KBUILD);
#else
pr_debug("Skip LLVM test because BPF support is not compiled\n");
return TEST_SKIP;
#endif
}
static int test__llvm__bpf_test_prologue_prog(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
#ifdef HAVE_LIBBPF_SUPPORT
return test__llvm(LLVM_TESTCASE_BPF_PROLOGUE);
#else
pr_debug("Skip LLVM test because BPF support is not compiled\n");
return TEST_SKIP;
#endif
}
static int test__llvm__bpf_test_relocation(struct test_suite *test __maybe_unused,
int subtest __maybe_unused)
{
#ifdef HAVE_LIBBPF_SUPPORT
return test__llvm(LLVM_TESTCASE_BPF_RELOCATION);
#else
pr_debug("Skip LLVM test because BPF support is not compiled\n");
return TEST_SKIP;
#endif
}
static struct test_case llvm_tests[] = {
#ifdef HAVE_LIBBPF_SUPPORT
TEST_CASE("Basic BPF llvm compile", llvm__bpf_base_prog),
TEST_CASE("kbuild searching", llvm__bpf_test_kbuild_prog),
TEST_CASE("Compile source for BPF prologue generation",
llvm__bpf_test_prologue_prog),
TEST_CASE("Compile source for BPF relocation", llvm__bpf_test_relocation),
#else
TEST_CASE_REASON("Basic BPF llvm compile", llvm__bpf_base_prog, "not compiled in"),
TEST_CASE_REASON("kbuild searching", llvm__bpf_test_kbuild_prog, "not compiled in"),
TEST_CASE_REASON("Compile source for BPF prologue generation",
llvm__bpf_test_prologue_prog, "not compiled in"),
TEST_CASE_REASON("Compile source for BPF relocation",
llvm__bpf_test_relocation, "not compiled in"),
#endif
{ .name = NULL, }
};
struct test_suite suite__llvm = {
.desc = "LLVM search and compile",
.test_cases = llvm_tests,
};
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