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#include <stdio.h>
#include <bpf/libbpf.h>
#include <util/llvm-utils.h>
#include <util/cache.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);
}
/*
* Randomly give it a "version" section since we don't really load it
* into kernel
*/
static const char test_bpf_prog[] =
"__attribute__((section(\"do_fork\"), used)) "
"int fork(void *ctx) {return 0;} "
"char _license[] __attribute__((section(\"license\"), used)) = \"GPL\";"
"int _version __attribute__((section(\"version\"), used)) = 0x40100;";
#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 (!obj)
return -1;
bpf_object__close(obj);
return 0;
}
#else
static int test__bpf_parsing(void *obj_buf __maybe_unused,
size_t obj_buf_sz __maybe_unused)
{
fprintf(stderr, " (skip bpf parsing)");
return 0;
}
#endif
int test__llvm(void)
{
char *tmpl_new, *clang_opt_new;
void *obj_buf;
size_t obj_buf_sz;
int err, old_verbose;
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 (verbose == 0 && !llvm_param.user_set_param && llvm__search_clang()) {
fprintf(stderr, " (no clang, try 'perf test -v LLVM')");
return TEST_SKIP;
}
old_verbose = verbose;
/*
* llvm is verbosity when error. Suppress all error output if
* not 'perf test -v'.
*/
if (verbose == 0)
verbose = -1;
if (!llvm_param.clang_bpf_cmd_template)
return -1;
if (!llvm_param.clang_opt)
llvm_param.clang_opt = strdup("");
err = asprintf(&tmpl_new, "echo '%s' | %s", test_bpf_prog,
llvm_param.clang_bpf_cmd_template);
if (err < 0)
return -1;
err = asprintf(&clang_opt_new, "-xc %s", llvm_param.clang_opt);
if (err < 0)
return -1;
llvm_param.clang_bpf_cmd_template = tmpl_new;
llvm_param.clang_opt = clang_opt_new;
err = llvm__compile_bpf("-", &obj_buf, &obj_buf_sz);
verbose = old_verbose;
if (err) {
if (!verbose)
fprintf(stderr, " (use -v to see error message)");
return -1;
}
err = test__bpf_parsing(obj_buf, obj_buf_sz);
free(obj_buf);
return err;
}
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