tools/perf/util/llvm-utils.h

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