Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753058AbbGULOK (ORCPT ); Tue, 21 Jul 2015 07:14:10 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:49970 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750992AbbGULOJ (ORCPT ); Tue, 21 Jul 2015 07:14:09 -0400 From: Wang Nan To: , CC: , , , , Subject: [PATCH 12/39 update] perf tools: Introduce llvm config options Date: Tue, 21 Jul 2015 11:13:34 +0000 Message-ID: <1437477214-149684-1-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1436445342-1402-13-git-send-email-wangnan0@huawei.com> References: <1436445342-1402-13-git-send-email-wangnan0@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.107.193.248] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6365 Lines: 200 This patch introduces [llvm] config section with 5 options. Following patches will use then to config llvm dynamica compiling. 'llvm-utils.[ch]' is introduced in this patch for holding all llvm/clang related stuffs. Example: [llvm] # Path to clang. If omit, search it from $PATH. clang-path = "/path/to/clang" # Cmdline template. Following line shows its default value. # Environment variable is used to passing options. # # *NOTE*: -D__KERNEL__ MUST appears before $CLANG_OPTIONS, # so user have a chance to use -U__KERNEL__ in $CLANG_OPTIONS # to cancel it. clang-bpf-cmd-template = "$CLANG_EXEC -D__KERNEL__ $CLANG_OPTIONS \ $KERNEL_INC_OPTIONS -Wno-unused-value \ -Wno-pointer-sign -working-directory \ $WORKING_DIR -c $CLANG_SOURCE -target \ bpf -O2 -o -" # Options passed to clang, will be passed to cmdline by # $CLANG_OPTIONS. clang-opt = "-Wno-unused-value -Wno-pointer-sign" # kbuild directory. If not set, use /lib/modules/`uname -r`/build. # If set to "" deliberately, skip kernel header auto-detector. kbuild-dir = "/path/to/kernel/build" # Options passed to 'make' when detecting kernel header options. kbuild-opts = "ARCH=x86_64" Signed-off-by: Wang Nan Cc: Alexei Starovoitov Cc: Brendan Gregg Cc: Daniel Borkmann Cc: David Ahern Cc: He Kuang Cc: Jiri Olsa Cc: Kaixu Xia Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/n/1436445342-1402-13-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- Introduce -D__KERNEL__, put it in front of $CLANG_OPTIONS. code in samples/bpf should be built by perf after this change. --- tools/perf/util/Build | 1 + tools/perf/util/config.c | 4 ++++ tools/perf/util/llvm-utils.c | 45 ++++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/llvm-utils.h | 36 +++++++++++++++++++++++++++++++++++ 4 files changed, 86 insertions(+) create mode 100644 tools/perf/util/llvm-utils.c create mode 100644 tools/perf/util/llvm-utils.h diff --git a/tools/perf/util/Build b/tools/perf/util/Build index 601d114..bc24293 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -14,6 +14,7 @@ libperf-y += find_next_bit.o libperf-y += help.o libperf-y += kallsyms.o libperf-y += levenshtein.o +libperf-y += llvm-utils.o libperf-y += parse-options.o libperf-y += parse-events.o libperf-y += path.o diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c index e18f653..2e452ac 100644 --- a/tools/perf/util/config.c +++ b/tools/perf/util/config.c @@ -12,6 +12,7 @@ #include "cache.h" #include "exec_cmd.h" #include "util/hist.h" /* perf_hist_config */ +#include "util/llvm-utils.h" /* perf_llvm_config */ #define MAXNAME (256) @@ -408,6 +409,9 @@ int perf_default_config(const char *var, const char *value, if (!prefixcmp(var, "call-graph.")) return perf_callchain_config(var, value); + if (!prefixcmp(var, "llvm.")) + return perf_llvm_config(var, value); + /* Add other config variables here. */ return 0; } diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c new file mode 100644 index 0000000..472e8cd --- /dev/null +++ b/tools/perf/util/llvm-utils.c @@ -0,0 +1,45 @@ +/* + * Copyright (C) 2015, Wang Nan + * Copyright (C) 2015, Huawei Inc. + */ + +#include +#include "util.h" +#include "debug.h" +#include "llvm-utils.h" +#include "cache.h" + +#define CLANG_BPF_CMD_DEFAULT_TEMPLATE \ + "$CLANG_EXEC -D__KERNEL__ $CLANG_OPTIONS " \ + "$KERNEL_INC_OPTIONS -Wno-unused-value " \ + "-Wno-pointer-sign -working-directory " \ + "$WORKING_DIR -c \"$CLANG_SOURCE\" -target bpf -O2 -o -" + +struct llvm_param llvm_param = { + .clang_path = "clang", + .clang_bpf_cmd_template = CLANG_BPF_CMD_DEFAULT_TEMPLATE, + .clang_opt = NULL, + .kbuild_dir = NULL, + .kbuild_opts = NULL, +}; + +int perf_llvm_config(const char *var, const char *value) +{ + if (prefixcmp(var, "llvm.")) + return 0; + var += sizeof("llvm.") - 1; + + if (!strcmp(var, "clang-path")) + llvm_param.clang_path = strdup(value); + else if (!strcmp(var, "clang-bpf-cmd-template")) + llvm_param.clang_bpf_cmd_template = strdup(value); + else if (!strcmp(var, "clang-opt")) + llvm_param.clang_opt = strdup(value); + else if (!strcmp(var, "kbuild-dir")) + llvm_param.kbuild_dir = strdup(value); + else if (!strcmp(var, "kbuild-opts")) + llvm_param.kbuild_opts = strdup(value); + else + return -1; + return 0; +} diff --git a/tools/perf/util/llvm-utils.h b/tools/perf/util/llvm-utils.h new file mode 100644 index 0000000..504b799 --- /dev/null +++ b/tools/perf/util/llvm-utils.h @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2015, Wang Nan + * 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; +}; + +extern struct llvm_param llvm_param; +extern int perf_llvm_config(const char *var, const char *value); +#endif -- 1.8.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/