This is a note to let you know that I've just added the patch titled tools build: Check if gettid() is available before providing helper to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tools-build-check-if-gettid-is-available-before-providing-helper.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 4541a8bb13a86e504416a13360c8dc64d2fd612a Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Date: Thu, 13 Jun 2019 12:04:19 -0300 Subject: tools build: Check if gettid() is available before providing helper MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> commit 4541a8bb13a86e504416a13360c8dc64d2fd612a upstream. Laura reported that the perf build failed in fedora when we got a glibc that provides gettid(), which I reproduced using fedora rawhide with the glibc-devel-2.29.9000-26.fc31.x86_64 package. Add a feature check to avoid providing a gettid() helper in such systems. On a fedora rawhide system with this patch applied we now get: [root@7a5f55352234 perf]# grep gettid /tmp/build/perf/FEATURE-DUMP feature-gettid=1 [root@7a5f55352234 perf]# cat /tmp/build/perf/feature/test-gettid.make.output [root@7a5f55352234 perf]# ldd /tmp/build/perf/feature/test-gettid.bin linux-vdso.so.1 (0x00007ffc6b1f6000) libc.so.6 => /lib64/libc.so.6 (0x00007f04e0a74000) /lib64/ld-linux-x86-64.so.2 (0x00007f04e0c47000) [root@7a5f55352234 perf]# nm /tmp/build/perf/feature/test-gettid.bin | grep -w gettid U gettid@@GLIBC_2.30 [root@7a5f55352234 perf]# While on a fedora:29 system: [acme@quaco perf]$ grep gettid /tmp/build/perf/FEATURE-DUMP feature-gettid=0 [acme@quaco perf]$ cat /tmp/build/perf/feature/test-gettid.make.output test-gettid.c: In function ‘main’: test-gettid.c:8:9: error: implicit declaration of function ‘gettid’; did you mean ‘getgid’? [-Werror=implicit-function-declaration] return gettid(); ^~~~~~ getgid cc1: all warnings being treated as errors [acme@quaco perf]$ Reported-by: Laura Abbott <labbott@xxxxxxxxxx> Tested-by: Laura Abbott <labbott@xxxxxxxxxx> Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx> Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx> Cc: Florian Weimer <fweimer@xxxxxxxxxx> Cc: Namhyung Kim <namhyung@xxxxxxxxxx> Cc: Stephane Eranian <eranian@xxxxxxxxxx> Link: https://lkml.kernel.org/n/tip-yfy3ch53agmklwu9o7rlgf9c@xxxxxxxxxxxxxx Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- tools/build/Makefile.feature | 1 + tools/build/feature/Makefile | 4 ++++ tools/build/feature/test-all.c | 5 +++++ tools/build/feature/test-gettid.c | 11 +++++++++++ tools/perf/Makefile.config | 4 ++++ tools/perf/jvmti/jvmti_agent.c | 2 ++ 6 files changed, 27 insertions(+) create mode 100644 tools/build/feature/test-gettid.c --- a/tools/build/Makefile.feature +++ b/tools/build/Makefile.feature @@ -35,6 +35,7 @@ FEATURE_TESTS_BASIC := fortify-source \ sync-compare-and-swap \ get_current_dir_name \ + gettid \ glibc \ gtk2 \ gtk2-infobar \ --- a/tools/build/feature/Makefile +++ b/tools/build/feature/Makefile @@ -51,6 +51,7 @@ FILES= test-get_cpuid.bin \ test-sdt.bin \ test-cxx.bin \ + test-gettid.bin \ test-jvmti.bin \ test-sched_getcpu.bin \ test-setns.bin @@ -242,6 +243,9 @@ $(OUTPUT)test-sdt.bin: $(OUTPUT)test-cxx.bin: $(BUILDXX) -std=gnu++11 +$(OUTPUT)test-gettid.bin: + $(BUILD) + $(OUTPUT)test-jvmti.bin: $(BUILD) --- a/tools/build/feature/test-all.c +++ b/tools/build/feature/test-all.c @@ -38,6 +38,10 @@ # include "test-get_current_dir_name.c" #undef main +#define main main_test_gettid +# include "test-gettid.c" +#undef main + #define main main_test_glibc # include "test-glibc.c" #undef main @@ -175,6 +179,7 @@ int main(int argc, char *argv[]) main_test_libelf(); main_test_libelf_mmap(); main_test_get_current_dir_name(); + main_test_gettid(); main_test_glibc(); main_test_dwarf(); main_test_dwarf_getlocations(); --- /dev/null +++ b/tools/build/feature/test-gettid.c @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2019, Red Hat Inc, Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> +#define _GNU_SOURCE +#include <unistd.h> + +int main(void) +{ + return gettid(); +} + +#undef _GNU_SOURCE --- a/tools/perf/Makefile.config +++ b/tools/perf/Makefile.config @@ -289,6 +289,10 @@ ifeq ($(feature-get_current_dir_name), 1 CFLAGS += -DHAVE_GET_CURRENT_DIR_NAME endif +ifeq ($(feature-gettid), 1) + CFLAGS += -DHAVE_GETTID +endif + ifdef NO_LIBELF NO_DWARF := 1 NO_DEMANGLE := 1 --- a/tools/perf/jvmti/jvmti_agent.c +++ b/tools/perf/jvmti/jvmti_agent.c @@ -45,10 +45,12 @@ static char jit_path[PATH_MAX]; static void *marker_addr; +#ifndef HAVE_GETTID static inline pid_t gettid(void) { return (pid_t)syscall(__NR_gettid); } +#endif static int get_e_machine(struct jitheader *hdr) { Patches currently in stable-queue which might be from acme@xxxxxxxxxx are queue-4.14/perf-tools-use-define-api.pure-full-instead-of-pure-parser.patch queue-4.14/perf-make-perf-able-to-build-with-latest-libbfd.patch queue-4.14/tools-build-feature-check-if-pthread_barrier_t-is-available.patch queue-4.14/tools-build-feature-check-if-eventfd-is-available.patch queue-4.14/tools-build-feature-check-if-get_current_dir_name-is-available.patch queue-4.14/tools-build-check-if-gettid-is-available-before-providing-helper.patch