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[AUTOFDO][AARCH64] Add support for profilebootstrap

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Add support for autoprofiledbootstrap in aarch64.
This is similar to what is done for i386. Added
gcc/config/aarch64/gcc-auto-profile for aarch64 profile
creation.

How to run:
configure --with-build-config=bootstrap-lto
make autoprofiledbootstrap

ChangeLog:

	* Makefile.def: AUTO_PROFILE based on cpu_type.
	* Makefile.in: Likewise.
	* configure: Regenerate.
	* configure.ac: Set autofdo_target.

gcc/ChangeLog:

	* config/aarch64/gcc-auto-profile: New file.

Signed-off-by: Kugan Vivekanandarajah <kvivekananda@nvidia.com>
This commit is contained in:
Kugan Vivekanandarajah
2025-05-26 11:41:59 +10:00
parent f9e63ebcf6
commit 86dc974cf3
5 changed files with 96 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Makefile.def
View File

@ -758,7 +758,7 @@ bootstrap_stage = {
bootstrap_target=profiledbootstrap ; };
bootstrap_stage = {
id=autoprofile ; prev=1 ;
autoprofile="$$s/gcc/config/i386/$(AUTO_PROFILE)" ; };
autoprofile="$$s/gcc/config/@cpu_typet@/$(AUTO_PROFILE)" ; };
bootstrap_stage = {
id=autofeedback ; prev=autoprofile ;
bootstrap_target=autoprofiledbootstrap ;

69
Makefile.in
View File

@ -38,6 +38,7 @@ build_alias=@build_noncanonical@
build_vendor=@build_vendor@
build_os=@build_os@
build=@build@
cpu_type=@cpu_type@
host_alias=@host_noncanonical@
host_vendor=@host_vendor@
host_os=@host_os@
@ -4271,7 +4272,7 @@ all-stageautoprofile-bfd: configure-stageautoprofile-bfd
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/bfd && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -5411,7 +5412,7 @@ all-stageautoprofile-opcodes: configure-stageautoprofile-opcodes
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/opcodes && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -6551,7 +6552,7 @@ all-stageautoprofile-binutils: configure-stageautoprofile-binutils
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/binutils && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -10037,7 +10038,7 @@ all-stageautoprofile-fixincludes: configure-stageautoprofile-fixincludes
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/fixincludes && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -11617,7 +11618,7 @@ all-stageautoprofile-gas: configure-stageautoprofile-gas
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/gas && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -12766,7 +12767,7 @@ all-stageautoprofile-gcc: configure-stageautoprofile-gcc
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/gcc && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -13915,7 +13916,7 @@ all-stageautoprofile-gmp: configure-stageautoprofile-gmp
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/gmp && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -15052,7 +15053,7 @@ all-stageautoprofile-mpfr: configure-stageautoprofile-mpfr
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/mpfr && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -16189,7 +16190,7 @@ all-stageautoprofile-mpc: configure-stageautoprofile-mpc
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/mpc && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -17326,7 +17327,7 @@ all-stageautoprofile-isl: configure-stageautoprofile-isl
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/isl && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -18454,7 +18455,7 @@ all-stageautoprofile-gold: configure-stageautoprofile-gold
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/gold && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -20539,7 +20540,7 @@ all-stageautoprofile-gettext: configure-stageautoprofile-gettext
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/gettext && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -22449,7 +22450,7 @@ all-stageautoprofile-ld: configure-stageautoprofile-ld
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/ld && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -23589,7 +23590,7 @@ all-stageautoprofile-libbacktrace: configure-stageautoprofile-libbacktrace
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/libbacktrace && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -24729,7 +24730,7 @@ all-stageautoprofile-libcpp: configure-stageautoprofile-libcpp
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/libcpp && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -25869,7 +25870,7 @@ all-stageautoprofile-libcody: configure-stageautoprofile-libcody
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/libcody && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -26858,7 +26859,7 @@ all-stageautoprofile-libdecnumber: configure-stageautoprofile-libdecnumber
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/libdecnumber && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -28460,7 +28461,7 @@ all-stageautoprofile-libiberty: configure-stageautoprofile-libiberty
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/libiberty && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -29609,7 +29610,7 @@ all-stageautoprofile-libiberty-linker-plugin: configure-stageautoprofile-libiber
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/libiberty-linker-plugin && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -30758,7 +30759,7 @@ all-stageautoprofile-libiconv: configure-stageautoprofile-libiconv
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/libiconv && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -34130,7 +34131,7 @@ all-stageautoprofile-zlib: configure-stageautoprofile-zlib
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/zlib && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -40321,7 +40322,7 @@ all-stageautoprofile-lto-plugin: configure-stageautoprofile-lto-plugin
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/lto-plugin && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -42397,7 +42398,7 @@ all-stageautoprofile-libctf: configure-stageautoprofile-libctf
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/libctf && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -43537,7 +43538,7 @@ all-stageautoprofile-libsframe: configure-stageautoprofile-libsframe
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/libsframe && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -44677,7 +44678,7 @@ all-stageautoprofile-libgrust: configure-stageautoprofile-libgrust
$(HOST_EXPORTS) \
$(POSTSTAGE1_HOST_EXPORTS) \
cd $(HOST_SUBDIR)/libgrust && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(STAGEautoprofile_CFLAGS)" \
GENERATOR_CFLAGS="$(STAGEautoprofile_GENERATOR_CFLAGS)" \
@ -45939,7 +45940,7 @@ all-stageautoprofile-target-libstdc++-v3: configure-stageautoprofile-target-libs
$(RAW_CXX_TARGET_EXPORTS) \
\
cd $(TARGET_SUBDIR)/libstdc++-v3 && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(CFLAGS_FOR_TARGET)" \
CXXFLAGS="$(CXXFLAGS_FOR_TARGET)" \
@ -47209,7 +47210,7 @@ all-stageautoprofile-target-libsanitizer: configure-stageautoprofile-target-libs
$(RAW_CXX_TARGET_EXPORTS) \
\
cd $(TARGET_SUBDIR)/libsanitizer && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(CFLAGS_FOR_TARGET)" \
CXXFLAGS="$(CXXFLAGS_FOR_TARGET)" \
@ -48479,7 +48480,7 @@ all-stageautoprofile-target-libvtv: configure-stageautoprofile-target-libvtv
$(RAW_CXX_TARGET_EXPORTS) \
\
cd $(TARGET_SUBDIR)/libvtv && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(CFLAGS_FOR_TARGET)" \
CXXFLAGS="$(CXXFLAGS_FOR_TARGET)" \
@ -50719,7 +50720,7 @@ all-stageautoprofile-target-libgcc: configure-stageautoprofile-target-libgcc
$(NORMAL_TARGET_EXPORTS) \
\
cd $(TARGET_SUBDIR)/libgcc && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(CFLAGS_FOR_TARGET)" \
CXXFLAGS="$(CXXFLAGS_FOR_TARGET)" \
@ -51951,7 +51952,7 @@ all-stageautoprofile-target-libbacktrace: configure-stageautoprofile-target-libb
$(NORMAL_TARGET_EXPORTS) \
\
cd $(TARGET_SUBDIR)/libbacktrace && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(CFLAGS_FOR_TARGET)" \
CXXFLAGS="$(CXXFLAGS_FOR_TARGET)" \
@ -55128,7 +55129,7 @@ all-stageautoprofile-target-libphobos: configure-stageautoprofile-target-libphob
$(NORMAL_TARGET_EXPORTS) \
\
cd $(TARGET_SUBDIR)/libphobos && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(CFLAGS_FOR_TARGET)" \
CXXFLAGS="$(CXXFLAGS_FOR_TARGET)" \
@ -58258,7 +58259,7 @@ all-stageautoprofile-target-zlib: configure-stageautoprofile-target-zlib
$(NORMAL_TARGET_EXPORTS) \
\
cd $(TARGET_SUBDIR)/zlib && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(CFLAGS_FOR_TARGET)" \
CXXFLAGS="$(CXXFLAGS_FOR_TARGET)" \
@ -60983,7 +60984,7 @@ all-stageautoprofile-target-libgomp: configure-stageautoprofile-target-libgomp
$(NORMAL_TARGET_EXPORTS) \
\
cd $(TARGET_SUBDIR)/libgomp && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(CFLAGS_FOR_TARGET)" \
CXXFLAGS="$(CXXFLAGS_FOR_TARGET)" \
@ -62738,7 +62739,7 @@ all-stageautoprofile-target-libatomic: configure-stageautoprofile-target-libatom
$(NORMAL_TARGET_EXPORTS) \
\
cd $(TARGET_SUBDIR)/libatomic && \
$$s/gcc/config/i386/$(AUTO_PROFILE) \
$$s/gcc/config/$(cpu_type)/$(AUTO_PROFILE) \
$(MAKE) $(BASE_FLAGS_TO_PASS) \
CFLAGS="$(CFLAGS_FOR_TARGET)" \
CXXFLAGS="$(CXXFLAGS_FOR_TARGET)" \

4
configure vendored
View File

@ -730,6 +730,7 @@ CPPFLAGS
LDFLAGS
CFLAGS
CC
cpu_type
target_subdir
host_subdir
build_subdir
@ -3395,6 +3396,9 @@ case "${target}" in
;;
esac
cpu_type=`echo ${host} | sed 's/-.*$//'`
# Disable libssp for some systems.
case "${target}" in
avr-*-*)

3
configure.ac
View File

@ -621,6 +621,9 @@ case "${target}" in
;;
esac
cpu_type=`echo ${host} | sed 's/-.*$//'`
AC_SUBST(cpu_type)
# Disable libssp for some systems.
case "${target}" in
avr-*-*)

53
gcc/config/aarch64/gcc-auto-profile Normal file
View File

@ -0,0 +1,53 @@
#!/bin/sh
# Profile workload for gcc profile feedback (autofdo) using Linux perf.
# Copyright The GNU Toolchain Authors.
#
# This file is part of GCC.
#
# GCC is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 3, or (at your option) any later
# version.
# GCC is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>. */
# Run perf record with branch stack sampling and check for
# specific error message to see if it is supported.
use_brbe=true
output=$(perf record -j any,u /bin/true 2>&1)
case "$output" in
*"PMU Hardware or event type doesn't support branch stack sampling."*)
use_brbe=false;;
*)
use_brbe=true;;
esac
FLAGS=u
if [ "$1" = "--kernel" ] ; then
FLAGS=k
shift
elif [ "$1" = "--all" ] ; then
FLAGS=u,k
shift
fi
if [ "$use_brbe" = true ] ; then
if grep -q hypervisor /proc/cpuinfo ; then
echo >&2 "Warning: branch profiling may not be functional in VMs"
fi
set -x
perf record -j any,$FLAGS "$@"
set +x
else
echo >&2 "Warning: branch profiling may not be functional without BRBE"
set -x
perf record "$@"
set +x
fi