Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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;
+}