tools/perf/util/llvm-utils.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2015, Wang Nan <wangnan0@huawei.com>
   4  * Copyright (C) 2015, Huawei Inc.
   5  */
   6 #ifndef __LLVM_UTILS_H
   7 #define __LLVM_UTILS_H
   8
   9 #include "debug.h"
  10
  11 struct llvm_param {
  12         /* Path of clang executable */
  13         const char *clang_path;
  14         /*
  15          * Template of clang bpf compiling. 5 env variables
  16          * can be used:
  17          *   $CLANG_EXEC:               Path to clang.
  18          *   $CLANG_OPTIONS:            Extra options to clang.
  19          *   $KERNEL_INC_OPTIONS:       Kernel include directories.
  20          *   $WORKING_DIR:              Kernel source directory.
  21          *   $CLANG_SOURCE:             Source file to be compiled.
  22          */
  23         const char *clang_bpf_cmd_template;
  24         /* Will be filled in $CLANG_OPTIONS */
  25         const char *clang_opt;
  26         /* Where to find kbuild system */
  27         const char *kbuild_dir;
  28         /*
  29          * Arguments passed to make, like 'ARCH=arm' if doing cross
  30          * compiling. Should not be used for dynamic compiling.
  31          */
  32         const char *kbuild_opts;
  33         /*
  34          * Default is false. If set to true, write compiling result
  35          * to object file.
  36          */
  37         bool dump_obj;
  38         /*
  39          * Default is false. If one of the above fields is set by user
  40          * explicitly then user_set_llvm is set to true. This is used
  41          * for perf test. If user doesn't set anything in .perfconfig
  42          * and clang is not found, don't trigger llvm test.
  43          */
  44         bool user_set_param;
  45 };
  46
  47 extern struct llvm_param llvm_param;
  48 int perf_llvm_config(const char *var, const char *value);
  49
  50 int llvm__compile_bpf(const char *path, void **p_obj_buf, size_t *p_obj_buf_sz);
  51
  52 /* This function is for test__llvm() use only */
  53 int llvm__search_clang(void);
  54
  55 /* Following functions are reused by builtin clang support */
  56 void llvm__get_kbuild_opts(char **kbuild_dir, char **kbuild_include_opts);
  57 int llvm__get_nr_cpus(void);
  58
  59 void llvm__dump_obj(const char *path, void *obj_buf, size_t size);
  60 #endif