From 1b16fffa389dcd4cc054f49e77a4e2ac61e8f287 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Fri, 4 May 2018 10:37:27 -0300 Subject: [PATCH] perf llvm-utils: Add bpf include path to clang command line We'll start putting headers for helpers to be used in eBPF proggies in there: # perf trace -v --no-syscalls -e empty.c |& grep "llvm compiling command : " llvm compiling command : /usr/lib64/ccache/clang -D__KERNEL__ -D__NR_CPUS__=4 -DLINUX_VERSION_CODE=0x41100 -nostdinc -isystem /usr/lib/gcc/x86_64-redhat-linux/7/include -I/home/acme/git/linux/arch/x86/include -I./arch/x86/include/generated -I/home/acme/git/linux/include -I./include -I/home/acme/git/linux/arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I/home/acme/git/linux/include/uapi -I./include/generated/uapi -include /home/acme/git/linux/include/linux/kconfig.h -I/home/acme/lib/include/perf/bpf -Wno-unused-value -Wno-pointer-sign -working-directory /lib/modules/4.17.0-rc3-00034-gf4ef6a438cee/build -c /home/acme/bpf/empty.c -target bpf -O2 -o - # Notice the "-I/home/acme/lib/include/perf/bpf" Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-6xq94xro8xlb5s9urznh3f9k@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Makefile.config | 7 +++++++ tools/perf/Makefile.perf | 4 ++++ tools/perf/util/Build | 2 ++ tools/perf/util/llvm-utils.c | 19 ++++++++++++++----- 4 files changed, 27 insertions(+), 5 deletions(-) diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config index ae7dc46e8f8a..3bca9a733f0e 100644 --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -885,6 +885,7 @@ endif # Among the variables below, these: # perfexecdir +# perf_include_dir # template_dir # mandir # infodir @@ -904,6 +905,7 @@ bindir = $(abspath $(prefix)/$(bindir_relative)) mandir = share/man infodir = share/info perfexecdir = libexec/perf-core +perf_include_dir = lib/include/perf sharedir = $(prefix)/share template_dir = share/perf-core/templates STRACE_GROUPS_DIR = share/perf-core/strace/groups @@ -934,6 +936,7 @@ bindir_SQ = $(subst ','\'',$(bindir)) mandir_SQ = $(subst ','\'',$(mandir)) infodir_SQ = $(subst ','\'',$(infodir)) perfexecdir_SQ = $(subst ','\'',$(perfexecdir)) +perf_include_dir_SQ = $(subst ','\'',$(perf_include_dir)) template_dir_SQ = $(subst ','\'',$(template_dir)) htmldir_SQ = $(subst ','\'',$(htmldir)) tipdir_SQ = $(subst ','\'',$(tipdir)) @@ -944,14 +947,17 @@ srcdir_SQ = $(subst ','\'',$(srcdir)) ifneq ($(filter /%,$(firstword $(perfexecdir))),) perfexec_instdir = $(perfexecdir) +perf_include_instdir = $(perf_include_dir) STRACE_GROUPS_INSTDIR = $(STRACE_GROUPS_DIR) tip_instdir = $(tipdir) else perfexec_instdir = $(prefix)/$(perfexecdir) +perf_include_instdir = $(prefix)/$(perf_include_dir) STRACE_GROUPS_INSTDIR = $(prefix)/$(STRACE_GROUPS_DIR) tip_instdir = $(prefix)/$(tipdir) endif perfexec_instdir_SQ = $(subst ','\'',$(perfexec_instdir)) +perf_include_instdir_SQ = $(subst ','\'',$(perf_include_instdir)) STRACE_GROUPS_INSTDIR_SQ = $(subst ','\'',$(STRACE_GROUPS_INSTDIR)) tip_instdir_SQ = $(subst ','\'',$(tip_instdir)) @@ -999,6 +1005,7 @@ $(call detected_var,ETC_PERFCONFIG_SQ) $(call detected_var,STRACE_GROUPS_DIR_SQ) $(call detected_var,prefix_SQ) $(call detected_var,perfexecdir_SQ) +$(call detected_var,perf_include_dir_SQ) $(call detected_var,tipdir_SQ) $(call detected_var,srcdir_SQ) $(call detected_var,LIBDIR) diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index 83e453de36f8..d9663b1cf43e 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -767,6 +767,10 @@ ifndef NO_JVMTI endif $(call QUIET_INSTALL, libexec) \ $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)' +ifndef NO_LIBBPF + $(call QUIET_INSTALL, lib) \ + $(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perf_include_instdir_SQ)/bpf' +endif $(call QUIET_INSTALL, perf-archive) \ $(INSTALL) $(OUTPUT)perf-archive -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)' $(call QUIET_INSTALL, perf-with-kcore) \ diff --git a/tools/perf/util/Build b/tools/perf/util/Build index 8052373bcd6a..5d4c45b76895 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -152,6 +152,8 @@ libperf-y += perf-hooks.o libperf-$(CONFIG_CXX) += c++/ CFLAGS_config.o += -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))" +CFLAGS_llvm-utils.o += -DPERF_INCLUDE_DIR="BUILD_STR($(perf_include_dir_SQ))" + # avoid compiler warnings in 32-bit mode CFLAGS_genelf_debug.o += -Wno-packed diff --git a/tools/perf/util/llvm-utils.c b/tools/perf/util/llvm-utils.c index 1cca0a2fa641..976e658e38dc 100644 --- a/tools/perf/util/llvm-utils.c +++ b/tools/perf/util/llvm-utils.c @@ -14,11 +14,12 @@ #include "config.h" #include "util.h" #include +#include #define CLANG_BPF_CMD_DEFAULT_TEMPLATE \ "$CLANG_EXEC -D__KERNEL__ -D__NR_CPUS__=$NR_CPUS "\ "-DLINUX_VERSION_CODE=$LINUX_VERSION_CODE " \ - "$CLANG_OPTIONS $KERNEL_INC_OPTIONS " \ + "$CLANG_OPTIONS $KERNEL_INC_OPTIONS $PERF_BPF_INC_OPTIONS " \ "-Wno-unused-value -Wno-pointer-sign " \ "-working-directory $WORKING_DIR " \ "-c \"$CLANG_SOURCE\" -target bpf -O2 -o -" @@ -212,7 +213,7 @@ version_notice(void) " \t\thttp://llvm.org/apt\n\n" " \tIf you are using old version of clang, change 'clang-bpf-cmd-template'\n" " \toption in [llvm] section of ~/.perfconfig to:\n\n" -" \t \"$CLANG_EXEC $CLANG_OPTIONS $KERNEL_INC_OPTIONS \\\n" +" \t \"$CLANG_EXEC $CLANG_OPTIONS $KERNEL_INC_OPTIONS $PERF_BPF_INC_OPTIONS \\\n" " \t -working-directory $WORKING_DIR -c $CLANG_SOURCE \\\n" " \t -emit-llvm -o - | /path/to/llc -march=bpf -filetype=obj -o -\"\n" " \t(Replace /path/to/llc with path to your llc)\n\n" @@ -431,9 +432,11 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf, const char *clang_opt = llvm_param.clang_opt; char clang_path[PATH_MAX], abspath[PATH_MAX], nr_cpus_avail_str[64]; char serr[STRERR_BUFSIZE]; - char *kbuild_dir = NULL, *kbuild_include_opts = NULL; + char *kbuild_dir = NULL, *kbuild_include_opts = NULL, + *perf_bpf_include_opts = NULL; const char *template = llvm_param.clang_bpf_cmd_template; - char *command_echo, *command_out; + char *command_echo = NULL, *command_out; + char *perf_include_dir = system_path(PERF_INCLUDE_DIR); if (path[0] != '-' && realpath(path, abspath) == NULL) { err = errno; @@ -471,12 +474,14 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf, snprintf(linux_version_code_str, sizeof(linux_version_code_str), "0x%x", kernel_version); - + if (asprintf(&perf_bpf_include_opts, "-I%s/bpf", perf_include_dir) < 0) + goto errout; force_set_env("NR_CPUS", nr_cpus_avail_str); force_set_env("LINUX_VERSION_CODE", linux_version_code_str); force_set_env("CLANG_EXEC", clang_path); force_set_env("CLANG_OPTIONS", clang_opt); force_set_env("KERNEL_INC_OPTIONS", kbuild_include_opts); + force_set_env("PERF_BPF_INC_OPTIONS", perf_bpf_include_opts); force_set_env("WORKING_DIR", kbuild_dir ? : "."); /* @@ -512,6 +517,8 @@ int llvm__compile_bpf(const char *path, void **p_obj_buf, free(command_out); free(kbuild_dir); free(kbuild_include_opts); + free(perf_bpf_include_opts); + free(perf_include_dir); if (!p_obj_buf) free(obj_buf); @@ -526,6 +533,8 @@ errout: free(kbuild_dir); free(kbuild_include_opts); free(obj_buf); + free(perf_bpf_include_opts); + free(perf_include_dir); if (p_obj_buf) *p_obj_buf = NULL; if (p_obj_buf_sz)