linux/tools/perf/util/llvm-utils.h
Wang Nan 9bc898c701 perf tests: Add LLVM test for eBPF on-the-fly compiling
Previous patches introduce llvm__compile_bpf() to compile source file to
eBPF object. This patch adds testcase to test it. It also tests libbpf
by opening generated object after applying next patch which introduces
HAVE_LIBBPF_SUPPORT option.

Since llvm__compile_bpf() prints long messages which users who don't
explicitly test llvm doesn't care, this patch set verbose to -1 to
suppress all debug, warning and error message, and hint user use 'perf
test -v' to see the full output.

For the same reason, if clang is not found in PATH and there's no [llvm]
section in .perfconfig, skip this test.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kaixu Xia <xiakaixu@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/n/1436445342-1402-17-git-send-email-wangnan0@huawei.com
[ Add tools/lib/bpf/ to tools/perf/MANIFEST, so that the tarball targets build ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-08-07 10:57:24 -03:00

50 lines
1.4 KiB
C

/*
* Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
* Copyright (C) 2015, Huawei Inc.
*/
#ifndef __LLVM_UTILS_H
#define __LLVM_UTILS_H
#include "debug.h"
struct llvm_param {
/* Path of clang executable */
const char *clang_path;
/*
* Template of clang bpf compiling. 5 env variables
* can be used:
* $CLANG_EXEC: Path to clang.
* $CLANG_OPTIONS: Extra options to clang.
* $KERNEL_INC_OPTIONS: Kernel include directories.
* $WORKING_DIR: Kernel source directory.
* $CLANG_SOURCE: Source file to be compiled.
*/
const char *clang_bpf_cmd_template;
/* Will be filled in $CLANG_OPTIONS */
const char *clang_opt;
/* Where to find kbuild system */
const char *kbuild_dir;
/*
* Arguments passed to make, like 'ARCH=arm' if doing cross
* compiling. Should not be used for dynamic compiling.
*/
const char *kbuild_opts;
/*
* Default is false. If one of the above fields is set by user
* explicitly then user_set_llvm is set to true. This is used
* for perf test. If user doesn't set anything in .perfconfig
* and clang is not found, don't trigger llvm test.
*/
bool user_set_param;
};
extern struct llvm_param llvm_param;
extern int perf_llvm_config(const char *var, const char *value);
extern int llvm__compile_bpf(const char *path, void **p_obj_buf,
size_t *p_obj_buf_sz);
/* This function is for test__llvm() use only */
extern int llvm__search_clang(void);
#endif