LXR linux/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 <stdbool.h>
  10
  11struct llvm_param {
  12        /* Path of clang executable */
  13        const char *clang_path;
  14        /* Path of llc executable */
  15        const char *llc_path;
  16        /*
  17         * Template of clang bpf compiling. 5 env variables
  18         * can be used:
  19         *   $CLANG_EXEC:               Path to clang.
  20         *   $CLANG_OPTIONS:            Extra options to clang.
  21         *   $KERNEL_INC_OPTIONS:       Kernel include directories.
  22         *   $WORKING_DIR:              Kernel source directory.
  23         *   $CLANG_SOURCE:             Source file to be compiled.
  24         */
  25        const char *clang_bpf_cmd_template;
  26        /* Will be filled in $CLANG_OPTIONS */
  27        const char *clang_opt;
  28        /*
  29         * If present it'll add -emit-llvm to $CLANG_OPTIONS to pipe
  30         * the clang output to llc, useful for new llvm options not
  31         * yet selectable via 'clang -mllvm option', such as -mattr=dwarfris
  32         * in clang 6.0/llvm 7
  33         */
  34        const char *opts;
  35        /* Where to find kbuild system */
  36        const char *kbuild_dir;
  37        /*
  38         * Arguments passed to make, like 'ARCH=arm' if doing cross
  39         * compiling. Should not be used for dynamic compiling.
  40         */
  41        const char *kbuild_opts;
  42        /*
  43         * Default is false. If set to true, write compiling result
  44         * to object file.
  45         */
  46        bool dump_obj;
  47        /*
  48         * Default is false. If one of the above fields is set by user
  49         * explicitly then user_set_llvm is set to true. This is used
  50         * for perf test. If user doesn't set anything in .perfconfig
  51         * and clang is not found, don't trigger llvm test.
  52         */
  53        bool user_set_param;
  54};
  55
  56extern struct llvm_param llvm_param;
  57int perf_llvm_config(const char *var, const char *value);
  58
  59int llvm__compile_bpf(const char *path, void **p_obj_buf, size_t *p_obj_buf_sz);
  60
  61/* This function is for test__llvm() use only */
  62int llvm__search_clang(void);
  63
  64/* Following functions are reused by builtin clang support */
  65void llvm__get_kbuild_opts(char **kbuild_dir, char **kbuild_include_opts);
  66int llvm__get_nr_cpus(void);
  67
  68void llvm__dump_obj(const char *path, void *obj_buf, size_t size);
  69#endif
  70