Merge tag 'perf-core-for-mingo-20161205' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

Fixes:

 - Do not show a bogus target address in 'perf annotate' for targetless powerpc
   jump instructions such as 'bctr' (Ravi Bangoria)

 - Fix tools/build race conditions with the fixdep utility (Jiri Olsa)

 - Fix building objtool with clang (Peter Foley)

Infrastructure changes:

- Support linking perf with clang and LLVM libraries, initially statically, but
  this limitation will be lifted and shared libraries, when available, will
  be preferred to the static build, that should, as with other features, be
  enabled explicitly (Wang Nan)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

28 files changed, 795 insertions, 195 deletions

diff --git a/tools/build/Build.include b/tools/build/Build.include
index c4ae12a5d0a5..418871d02ebf 100644
--- a/tools/build/Build.include
+++ b/tools/build/Build.include
@@ -65,22 +65,22 @@ dep-cmd = $(if $(wildcard $(fixdep)),
            printf '\# cannot find fixdep (%s)\n' $(fixdep) > $(dot-target).cmd; \
            printf '\# using basic dep data\n\n' >> $(dot-target).cmd;           \
            cat $(depfile) >> $(dot-target).cmd;                                 \
-           printf '%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd)
+           printf '\n%s\n' 'cmd_$@ := $(make-cmd)' >> $(dot-target).cmd)
 
 ###
 # if_changed_dep  - execute command if any prerequisite is newer than
 #                   target, or command line has changed and update
 #                   dependencies in the cmd file
 if_changed_dep = $(if $(strip $(any-prereq) $(arg-check)),         \
-	@set -e;                                                   \
-	$(echo-cmd) $(cmd_$(1)) && $(dep-cmd))
+                  @set -e;                                         \
+                  $(echo-cmd) $(cmd_$(1)) && $(dep-cmd))
 
 # if_changed      - execute command if any prerequisite is newer than
 #                   target, or command line has changed
-if_changed = $(if $(strip $(any-prereq) $(arg-check)),             \
-	@set -e;                                                   \
-	$(echo-cmd) $(cmd_$(1));                                   \
-	printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
+if_changed = $(if $(strip $(any-prereq) $(arg-check)),                   \
+              @set -e;                                                   \
+              $(echo-cmd) $(cmd_$(1));                                   \
+              printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd)
 
 ###
 # C flags to be used in rule definitions, includes:
@@ -89,12 +89,12 @@ if_changed = $(if $(strip $(any-prereq) $(arg-check)),             \
 # - per target C flags
 # - per object C flags
 # - BUILD_STR macro to allow '-D"$(variable)"' constructs
-c_flags_1 = -Wp,-MD,$(depfile),-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj))
+c_flags_1 = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CFLAGS) -D"BUILD_STR(s)=\#s" $(CFLAGS_$(basetarget).o) $(CFLAGS_$(obj))
 c_flags_2 = $(filter-out $(CFLAGS_REMOVE_$(basetarget).o), $(c_flags_1))
 c_flags   = $(filter-out $(CFLAGS_REMOVE_$(obj)), $(c_flags_2))
-cxx_flags = -Wp,-MD,$(depfile),-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXXFLAGS_$(basetarget).o) $(CXXFLAGS_$(obj))
+cxx_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CXXFLAGS) -D"BUILD_STR(s)=\#s" $(CXXFLAGS_$(basetarget).o) $(CXXFLAGS_$(obj))
 
 ###
 ## HOSTCC C flags
 
-host_c_flags = -Wp,-MD,$(depfile),-MT,$@ $(CHOSTFLAGS) -D"BUILD_STR(s)=\#s" $(CHOSTFLAGS_$(basetarget).o) $(CHOSTFLAGS_$(obj))
+host_c_flags = -Wp,-MD,$(depfile) -Wp,-MT,$@ $(CHOSTFLAGS) -D"BUILD_STR(s)=\#s" $(CHOSTFLAGS_$(basetarget).o) $(CHOSTFLAGS_$(obj))
diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature
index ae52e029dd22..e3fb5ecbdcb6 100644
--- a/tools/build/Makefile.feature
+++ b/tools/build/Makefile.feature
@@ -27,58 +27,58 @@ endef
 #   the rule that uses them - an example for that is the 'bionic'
 #   feature check. ]
 #
-FEATURE_TESTS_BASIC :=			\
-	backtrace			\
-	dwarf				\
-	dwarf_getlocations		\
-	fortify-source			\
-	sync-compare-and-swap		\
-	glibc				\
-	gtk2				\
-	gtk2-infobar			\
-	libaudit			\
-	libbfd				\
-	libelf				\
-	libelf-getphdrnum		\
-	libelf-gelf_getnote		\
-	libelf-getshdrstrndx		\
-	libelf-mmap			\
-	libnuma				\
-	numa_num_possible_cpus		\
-	libperl				\
-	libpython			\
-	libpython-version		\
-	libslang			\
-	libcrypto			\
-	libunwind			\
-	libunwind-x86			\
-	libunwind-x86_64		\
-	libunwind-arm			\
-	libunwind-aarch64		\
-	pthread-attr-setaffinity-np	\
-	stackprotector-all		\
-	timerfd				\
-	libdw-dwarf-unwind		\
-	zlib				\
-	lzma				\
-	get_cpuid			\
-	bpf				\
-	sdt
+FEATURE_TESTS_BASIC :=                  \
+        backtrace                       \
+        dwarf                           \
+        dwarf_getlocations              \
+        fortify-source                  \
+        sync-compare-and-swap           \
+        glibc                           \
+        gtk2                            \
+        gtk2-infobar                    \
+        libaudit                        \
+        libbfd                          \
+        libelf                          \
+        libelf-getphdrnum               \
+        libelf-gelf_getnote             \
+        libelf-getshdrstrndx            \
+        libelf-mmap                     \
+        libnuma                         \
+        numa_num_possible_cpus          \
+        libperl                         \
+        libpython                       \
+        libpython-version               \
+        libslang                        \
+        libcrypto                       \
+        libunwind                       \
+        libunwind-x86                   \
+        libunwind-x86_64                \
+        libunwind-arm                   \
+        libunwind-aarch64               \
+        pthread-attr-setaffinity-np     \
+        stackprotector-all              \
+        timerfd                         \
+        libdw-dwarf-unwind              \
+        zlib                            \
+        lzma                            \
+        get_cpuid                       \
+        bpf                             \
+        sdt
 
 # FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list
 # of all feature tests
-FEATURE_TESTS_EXTRA :=			\
-	bionic				\
-	compile-32			\
-	compile-x32			\
-	cplus-demangle			\
-	hello				\
-	libbabeltrace			\
-	liberty				\
-	liberty-z			\
-	libunwind-debug-frame		\
-	libunwind-debug-frame-arm	\
-	libunwind-debug-frame-aarch64
+FEATURE_TESTS_EXTRA :=                  \
+         bionic                         \
+         compile-32                     \
+         compile-x32                    \
+         cplus-demangle                 \
+         hello                          \
+         libbabeltrace                  \
+         liberty                        \
+         liberty-z                      \
+         libunwind-debug-frame          \
+         libunwind-debug-frame-arm      \
+         libunwind-debug-frame-aarch64
 
 FEATURE_TESTS ?= $(FEATURE_TESTS_BASIC)
 
@@ -86,26 +86,26 @@ ifeq ($(FEATURE_TESTS),all)
   FEATURE_TESTS := $(FEATURE_TESTS_BASIC) $(FEATURE_TESTS_EXTRA)
 endif
 
-FEATURE_DISPLAY ?=			\
-	dwarf				\
-	dwarf_getlocations		\
-	glibc				\
-	gtk2				\
-	libaudit			\
-	libbfd				\
-	libelf				\
-	libnuma				\
-	numa_num_possible_cpus		\
-	libperl				\
-	libpython			\
-	libslang			\
-	libcrypto			\
-	libunwind			\
-	libdw-dwarf-unwind		\
-	zlib				\
-	lzma				\
-	get_cpuid			\
-	bpf
+FEATURE_DISPLAY ?=              \
+         dwarf                  \
+         dwarf_getlocations     \
+         glibc                  \
+         gtk2                   \
+         libaudit               \
+         libbfd                 \
+         libelf                 \
+         libnuma                \
+         numa_num_possible_cpus \
+         libperl                \
+         libpython              \
+         libslang               \
+         libcrypto              \
+         libunwind              \
+         libdw-dwarf-unwind     \
+         zlib                   \
+         lzma                   \
+         get_cpuid              \
+         bpf
 
 # Set FEATURE_CHECK_(C|LD)FLAGS-all for all FEATURE_TESTS features.
 # If in the future we need per-feature checks/flags for features not
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index 8f668bce8996..303196c16019 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -1,60 +1,61 @@
-FILES=					\
-	test-all.bin			\
-	test-backtrace.bin		\
-	test-bionic.bin			\
-	test-dwarf.bin			\
-	test-dwarf_getlocations.bin	\
-	test-fortify-source.bin		\
-	test-sync-compare-and-swap.bin	\
-	test-glibc.bin			\
-	test-gtk2.bin			\
-	test-gtk2-infobar.bin		\
-	test-hello.bin			\
-	test-libaudit.bin		\
-	test-libbfd.bin			\
-	test-liberty.bin		\
-	test-liberty-z.bin		\
-	test-cplus-demangle.bin		\
-	test-libelf.bin			\
-	test-libelf-getphdrnum.bin	\
-	test-libelf-gelf_getnote.bin	\
-	test-libelf-getshdrstrndx.bin	\
-	test-libelf-mmap.bin		\
-	test-libnuma.bin		\
-	test-numa_num_possible_cpus.bin	\
-	test-libperl.bin		\
-	test-libpython.bin		\
-	test-libpython-version.bin	\
-	test-libslang.bin		\
-	test-libcrypto.bin		\
-	test-libunwind.bin		\
-	test-libunwind-debug-frame.bin	\
-	test-libunwind-x86.bin		\
-	test-libunwind-x86_64.bin	\
-	test-libunwind-arm.bin		\
-	test-libunwind-aarch64.bin	\
-	test-libunwind-debug-frame-arm.bin	\
-	test-libunwind-debug-frame-aarch64.bin	\
-	test-pthread-attr-setaffinity-np.bin	\
-	test-stackprotector-all.bin	\
-	test-timerfd.bin		\
-	test-libdw-dwarf-unwind.bin	\
-	test-libbabeltrace.bin		\
-	test-compile-32.bin		\
-	test-compile-x32.bin		\
-	test-zlib.bin			\
-	test-lzma.bin			\
-	test-bpf.bin			\
-	test-get_cpuid.bin		\
-	test-sdt.bin			\
-	test-cxx.bin			\
-	test-jvmti.bin
+FILES=                                          \
+         test-all.bin                           \
+         test-backtrace.bin                     \
+         test-bionic.bin                        \
+         test-dwarf.bin                         \
+         test-dwarf_getlocations.bin            \
+         test-fortify-source.bin                \
+         test-sync-compare-and-swap.bin         \
+         test-glibc.bin                         \
+         test-gtk2.bin                          \
+         test-gtk2-infobar.bin                  \
+         test-hello.bin                         \
+         test-libaudit.bin                      \
+         test-libbfd.bin                        \
+         test-liberty.bin                       \
+         test-liberty-z.bin                     \
+         test-cplus-demangle.bin                \
+         test-libelf.bin                        \
+         test-libelf-getphdrnum.bin             \
+         test-libelf-gelf_getnote.bin           \
+         test-libelf-getshdrstrndx.bin          \
+         test-libelf-mmap.bin                   \
+         test-libnuma.bin                       \
+         test-numa_num_possible_cpus.bin        \
+         test-libperl.bin                       \
+         test-libpython.bin                     \
+         test-libpython-version.bin             \
+         test-libslang.bin                      \
+         test-libcrypto.bin                     \
+         test-libunwind.bin                     \
+         test-libunwind-debug-frame.bin         \
+         test-libunwind-x86.bin                 \
+         test-libunwind-x86_64.bin              \
+         test-libunwind-arm.bin                 \
+         test-libunwind-aarch64.bin             \
+         test-libunwind-debug-frame-arm.bin     \
+         test-libunwind-debug-frame-aarch64.bin \
+         test-pthread-attr-setaffinity-np.bin   \
+         test-stackprotector-all.bin            \
+         test-timerfd.bin                       \
+         test-libdw-dwarf-unwind.bin            \
+         test-libbabeltrace.bin                 \
+         test-compile-32.bin                    \
+         test-compile-x32.bin                   \
+         test-zlib.bin                          \
+         test-lzma.bin                          \
+         test-bpf.bin                           \
+         test-get_cpuid.bin                     \
+         test-sdt.bin                           \
+         test-cxx.bin                           \
+         test-jvmti.bin
 
 FILES := $(addprefix $(OUTPUT),$(FILES))
 
 CC := $(CROSS_COMPILE)gcc -MD
 CXX := $(CROSS_COMPILE)g++ -MD
 PKG_CONFIG := $(CROSS_COMPILE)pkg-config
+LLVM_CONFIG ?= llvm-config
 
 all: $(FILES)
 
@@ -229,6 +230,23 @@ $(OUTPUT)test-cxx.bin:
 $(OUTPUT)test-jvmti.bin:
 	$(BUILD)
 
+$(OUTPUT)test-llvm.bin:
+	$(BUILDXX) -std=gnu++11 					\
+		-I$(shell $(LLVM_CONFIG) --includedir) 		\
+		-L$(shell $(LLVM_CONFIG) --libdir)		\
+		$(shell $(LLVM_CONFIG) --libs Core BPF)		\
+		$(shell $(LLVM_CONFIG) --system-libs)
+
+$(OUTPUT)test-clang.bin:
+	$(BUILDXX) -std=gnu++11 					\
+		-I$(shell $(LLVM_CONFIG) --includedir) 		\
+		-L$(shell $(LLVM_CONFIG) --libdir)		\
+		-Wl,--start-group -lclangBasic -lclangDriver	\
+		  -lclangFrontend -lclangEdit -lclangLex	\
+		  -lclangAST -Wl,--end-group 			\
+		$(shell $(LLVM_CONFIG) --libs Core option)	\
+		$(shell $(LLVM_CONFIG) --system-libs)
+
 -include $(OUTPUT)*.d
 
 ###############################
diff --git a/tools/build/feature/test-clang.cpp b/tools/build/feature/test-clang.cpp
new file mode 100644
index 000000000000..e23c1b1f1b91
--- /dev/null
+++ b/tools/build/feature/test-clang.cpp
@@ -0,0 +1,21 @@
+#include "clang/Basic/VirtualFileSystem.h"
+#include "clang/Driver/Driver.h"
+#include "clang/Frontend/TextDiagnosticPrinter.h"
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace clang;
+using namespace clang::driver;
+
+int main()
+{
+	IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
+	IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
+
+	DiagnosticsEngine Diags(DiagID, &*DiagOpts);
+	Driver TheDriver("test", "bpf-pc-linux", Diags);
+
+	llvm::llvm_shutdown();
+	return 0;
+}
diff --git a/tools/build/feature/test-llvm.cpp b/tools/build/feature/test-llvm.cpp
new file mode 100644
index 000000000000..d8d2cee35345
--- /dev/null
+++ b/tools/build/feature/test-llvm.cpp
@@ -0,0 +1,8 @@
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/raw_ostream.h"
+int main()
+{
+	llvm::errs() << "Hello World!\n";
+	llvm::llvm_shutdown();
+	return 0;
+}
diff --git a/tools/build/fixdep.c b/tools/build/fixdep.c
index 1521d36cef0d..734d1547cbae 100644
--- a/tools/build/fixdep.c
+++ b/tools/build/fixdep.c
@@ -49,7 +49,7 @@ static void parse_dep_file(void *map, size_t len)
 	char *end = m + len;
 	char *p;
 	char s[PATH_MAX];
-	int is_target;
+	int is_target, has_target = 0;
 	int saw_any_target = 0;
 	int is_first_dep = 0;
 
@@ -67,7 +67,8 @@ static void parse_dep_file(void *map, size_t len)
 		if (is_target) {
 			/* The /next/ file is the first dependency */
 			is_first_dep = 1;
-		} else {
+			has_target = 1;
+		} else if (has_target) {
 			/* Save this token/filename */
 			memcpy(s, m, p-m);
 			s[p - m] = 0;
diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index 8a493d46fab9..09c2a9874f2f 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -136,6 +136,7 @@ endif
 # Treat warnings as errors unless directed not to
 ifneq ($(WERROR),0)
   CFLAGS += -Werror
+  CXXFLAGS += -Werror
 endif
 
 ifndef DEBUG
@@ -182,6 +183,13 @@ CFLAGS += -Wall
 CFLAGS += -Wextra
 CFLAGS += -std=gnu99
 
+CXXFLAGS += -std=gnu++11 -fno-exceptions -fno-rtti
+CXXFLAGS += -Wall
+CXXFLAGS += -fno-omit-frame-pointer
+CXXFLAGS += -ggdb3
+CXXFLAGS += -funwind-tables
+CXXFLAGS += -Wno-strict-aliasing
+
 # Enforce a non-executable stack, as we may regress (again) in the future by
 # adding assembler files missing the .GNU-stack linker note.
 LDFLAGS += -Wl,-z,noexecstack
@@ -204,24 +212,27 @@ ifeq ($(DEBUG),0)
   endif
 endif
 
-CFLAGS += -I$(src-perf)/util/include
-CFLAGS += -I$(src-perf)/arch/$(ARCH)/include
-CFLAGS += -I$(srctree)/tools/include/uapi
-CFLAGS += -I$(srctree)/tools/include/
-CFLAGS += -I$(srctree)/tools/arch/$(ARCH)/include/uapi
-CFLAGS += -I$(srctree)/tools/arch/$(ARCH)/include/
-CFLAGS += -I$(srctree)/tools/arch/$(ARCH)/
+INC_FLAGS += -I$(src-perf)/util/include
+INC_FLAGS += -I$(src-perf)/arch/$(ARCH)/include
+INC_FLAGS += -I$(srctree)/tools/include/uapi
+INC_FLAGS += -I$(srctree)/tools/include/
+INC_FLAGS += -I$(srctree)/tools/arch/$(ARCH)/include/uapi
+INC_FLAGS += -I$(srctree)/tools/arch/$(ARCH)/include/
+INC_FLAGS += -I$(srctree)/tools/arch/$(ARCH)/
 
 # $(obj-perf)      for generated common-cmds.h
 # $(obj-perf)/util for generated bison/flex headers
 ifneq ($(OUTPUT),)
-CFLAGS += -I$(obj-perf)/util
-CFLAGS += -I$(obj-perf)
+INC_FLAGS += -I$(obj-perf)/util
+INC_FLAGS += -I$(obj-perf)
 endif
 
-CFLAGS += -I$(src-perf)/util
-CFLAGS += -I$(src-perf)
-CFLAGS += -I$(srctree)/tools/lib/
+INC_FLAGS += -I$(src-perf)/util
+INC_FLAGS += -I$(src-perf)
+INC_FLAGS += -I$(srctree)/tools/lib/
+
+CFLAGS   += $(INC_FLAGS)
+CXXFLAGS += $(INC_FLAGS)
 
 CFLAGS += -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE
 
@@ -783,6 +794,33 @@ ifndef NO_JVMTI
   endif
 endif
 
+USE_CXX = 0
+USE_CLANGLLVM = 0
+ifdef LIBCLANGLLVM
+  $(call feature_check,cxx)
+  ifneq ($(feature-cxx), 1)
+    msg := $(warning No g++ found, disable clang and llvm support. Please install g++)
+  else
+    $(call feature_check,llvm)
+    ifneq ($(feature-llvm), 1)
+      msg := $(warning No libLLVM found, disable clang and llvm support. Please install llvm-dev)
+    else
+      $(call feature_check,clang)
+      ifneq ($(feature-clang), 1)
+        msg := $(warning No libclang found, disable clang and llvm support. Please install libclang-dev)
+      else
+        CFLAGS += -DHAVE_LIBCLANGLLVM_SUPPORT
+        CXXFLAGS += -DHAVE_LIBCLANGLLVM_SUPPORT -I$(shell $(LLVM_CONFIG) --includedir)
+        $(call detected,CONFIG_CXX)
+        $(call detected,CONFIG_CLANGLLVM)
+	USE_CXX = 1
+	USE_LLVM = 1
+	USE_CLANG = 1
+      endif
+    endif
+  endif
+endif
+
 # Among the variables below, these:
 #   perfexecdir
 #   template_dir
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 3cb1df43ad3e..10495c9dbe71 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -88,6 +88,10 @@ include ../scripts/utilities.mak
 # and bypass the feature detection
 #
 # Define NO_JVMTI if you do not want jvmti agent built
+#
+# Define LIBCLANGLLVM if you DO want builtin clang and llvm support.
+# When selected, pass LLVM_CONFIG=/path/to/llvm-config to `make' if
+# llvm-config is not in $PATH.
 
 # As per kernel Makefile, avoid funny character set dependencies
 unexport LC_ALL
@@ -143,6 +147,7 @@ endef
 $(call allow-override,CC,$(CROSS_COMPILE)gcc)
 $(call allow-override,AR,$(CROSS_COMPILE)ar)
 $(call allow-override,LD,$(CROSS_COMPILE)ld)
+$(call allow-override,CXX,$(CROSS_COMPILE)g++)
 
 LD += $(EXTRA_LDFLAGS)
 
@@ -151,6 +156,7 @@ HOSTLD  ?= ld
 HOSTAR  ?= ar
 
 PKG_CONFIG = $(CROSS_COMPILE)pkg-config
+LLVM_CONFIG ?= llvm-config
 
 RM      = rm -f
 LN      = ln -f
@@ -171,7 +177,7 @@ SUBCMD_DIR	= $(srctree)/tools/lib/subcmd/
 # non-config cases
 config := 1
 
-NON_CONFIG_TARGETS := clean TAGS tags cscope help install-doc
+NON_CONFIG_TARGETS := clean TAGS tags cscope help install-doc install-man install-html install-info install-pdf doc man html info pdf
 
 ifdef MAKECMDGOALS
 ifeq ($(filter-out $(NON_CONFIG_TARGETS),$(MAKECMDGOALS)),)
@@ -262,17 +268,6 @@ python-clean := $(call QUIET_CLEAN, python) $(RM) -r $(PYTHON_EXTBUILD) $(OUTPUT
 PYTHON_EXT_SRCS := $(shell grep -v ^\# util/python-ext-sources)
 PYTHON_EXT_DEPS := util/python-ext-sources util/setup.py $(LIBTRACEEVENT) $(LIBAPI)
 
-$(OUTPUT)python/perf.so: $(PYTHON_EXT_SRCS) $(PYTHON_EXT_DEPS) $(LIBTRACEEVENT_DYNAMIC_LIST)
-	$(QUIET_GEN)LDSHARED="$(CC) -pthread -shared" \
-        CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS) $(LIBTRACEEVENT_DYNAMIC_LIST_LDFLAGS)' \
-	  $(PYTHON_WORD) util/setup.py \
-	  --quiet build_ext; \
-	mkdir -p $(OUTPUT)python && \
-	cp $(PYTHON_EXTBUILD_LIB)perf.so $(OUTPUT)python/
-#
-# No Perl scripts right now:
-#
-
 SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH))
 
 PROGRAMS += $(OUTPUT)perf
@@ -325,11 +320,6 @@ endif
 ifndef NO_GTK2
   ALL_PROGRAMS += $(OUTPUT)libperf-gtk.so
   GTK_IN := $(OUTPUT)gtk-in.o
-
-install-gtk: $(OUTPUT)libperf-gtk.so
-	$(call QUIET_INSTALL, 'GTK UI') \
-		$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(libdir_SQ)'; \
-		$(INSTALL) $(OUTPUT)libperf-gtk.so '$(DESTDIR_SQ)$(libdir_SQ)'
 endif
 
 ifdef ASCIIDOC8
@@ -338,6 +328,21 @@ endif
 
 LIBS = -Wl,--whole-archive $(PERFLIBS) -Wl,--no-whole-archive -Wl,--start-group $(EXTLIBS) -Wl,--end-group
 
+ifeq ($(USE_CLANG), 1)
+  CLANGLIBS_LIST = AST Basic CodeGen Driver Frontend Lex Tooling Edit Sema Analysis Parse Serialization
+  LIBCLANG = $(foreach l,$(CLANGLIBS_LIST),$(wildcard $(shell $(LLVM_CONFIG) --libdir)/libclang$(l).a))
+  LIBS += -Wl,--start-group $(LIBCLANG) -Wl,--end-group
+endif
+
+ifeq ($(USE_LLVM), 1)
+  LIBLLVM = $(shell $(LLVM_CONFIG) --libs all) $(shell $(LLVM_CONFIG) --system-libs)
+  LIBS += -L$(shell $(LLVM_CONFIG) --libdir) $(LIBLLVM)
+endif
+
+ifeq ($(USE_CXX), 1)
+  LIBS += -lstdc++
+endif
+
 export INSTALL SHELL_PATH
 
 ### Build rules
@@ -346,6 +351,14 @@ SHELL = $(SHELL_PATH)
 
 all: shell_compatibility_test $(ALL_PROGRAMS) $(LANG_BINDINGS) $(OTHER_PROGRAMS)
 
+$(OUTPUT)python/perf.so: $(PYTHON_EXT_SRCS) $(PYTHON_EXT_DEPS) $(LIBTRACEEVENT_DYNAMIC_LIST)
+	$(QUIET_GEN)LDSHARED="$(CC) -pthread -shared" \
+        CFLAGS='$(CFLAGS)' LDFLAGS='$(LDFLAGS) $(LIBTRACEEVENT_DYNAMIC_LIST_LDFLAGS)' \
+	  $(PYTHON_WORD) util/setup.py \
+	  --quiet build_ext; \
+	mkdir -p $(OUTPUT)python && \
+	cp $(PYTHON_EXTBUILD_LIB)perf.so $(OUTPUT)python/
+
 please_set_SHELL_PATH_to_a_more_modern_shell:
 	$(Q)$$(:)
 
@@ -356,7 +369,7 @@ strip: $(PROGRAMS) $(OUTPUT)perf
 
 PERF_IN := $(OUTPUT)perf-in.o
 
-export srctree OUTPUT RM CC LD AR CFLAGS V BISON FLEX AWK
+export srctree OUTPUT RM CC CXX LD AR CFLAGS CXXFLAGS V BISON FLEX AWK
 export HOSTCC HOSTLD HOSTAR
 include $(srctree)/tools/build/Makefile.include
 
@@ -691,7 +704,14 @@ check: $(OUTPUT)common-cmds.h
 
 ### Installation rules
 
+ifndef NO_GTK2
+install-gtk: $(OUTPUT)libperf-gtk.so
+	$(call QUIET_INSTALL, 'GTK UI') \
+		$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(libdir_SQ)'; \
+		$(INSTALL) $(OUTPUT)libperf-gtk.so '$(DESTDIR_SQ)$(libdir_SQ)'
+else
 install-gtk:
+endif
 
 install-tools: all install-gtk
 	$(call QUIET_INSTALL, binaries) \
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index af3ec94869aa..6676c2dd6dcb 100644
--- a/tools/perf/tests/Build
+++ b/tools/perf/tests/Build
@@ -43,6 +43,7 @@ perf-y += sdt.o
 perf-y += is_printable_array.o
 perf-y += bitmap.o
 perf-y += perf-hooks.o
+perf-y += clang.o
 
 $(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
 	$(call rule_mkdir)
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index d1bec0444be7..23605202d4a1 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -234,6 +234,15 @@ static struct test generic_tests[] = {
 		.func = test__perf_hooks,
 	},
 	{
+		.desc = "builtin clang support",
+		.func = test__clang,
+		.subtest = {
+			.skip_if_fail	= true,
+			.get_nr		= test__clang_subtest_get_nr,
+			.get_desc	= test__clang_subtest_get_desc,
+		}
+	},
+	{
 		.func = NULL,
 	},
 };
diff --git a/tools/perf/tests/clang.c b/tools/perf/tests/clang.c
new file mode 100644
index 000000000000..f853e242a86c
--- /dev/null
+++ b/tools/perf/tests/clang.c
@@ -0,0 +1,46 @@
+#include "tests.h"
+#include "debug.h"
+#include "util.h"
+#include "c++/clang-c.h"
+
+static struct {
+	int (*func)(void);
+	const char *desc;
+} clang_testcase_table[] = {
+#ifdef HAVE_LIBCLANGLLVM_SUPPORT
+	{
+		.func = test__clang_to_IR,
+		.desc = "builtin clang compile C source to IR",
+	},
+	{
+		.func = test__clang_to_obj,
+		.desc = "builtin clang compile C source to ELF object",
+	},
+#endif
+};
+
+int test__clang_subtest_get_nr(void)
+{
+	return (int)ARRAY_SIZE(clang_testcase_table);
+}
+
+const char *test__clang_subtest_get_desc(int i)
+{
+	if (i < 0 || i >= (int)ARRAY_SIZE(clang_testcase_table))
+		return NULL;
+	return clang_testcase_table[i].desc;
+}
+
+#ifndef HAVE_LIBCLANGLLVM_SUPPORT
+int test__clang(int i __maybe_unused)
+{
+	return TEST_SKIP;
+}
+#else
+int test__clang(int i)
+{
+	if (i < 0 || i >= (int)ARRAY_SIZE(clang_testcase_table))
+		return TEST_FAIL;
+	return clang_testcase_table[i].func();
+}
+#endif
diff --git a/tools/perf/tests/llvm.h b/tools/perf/tests/llvm.h
index 0eaa604be99d..b83571758d83 100644
--- a/tools/perf/tests/llvm.h
+++ b/tools/perf/tests/llvm.h
@@ -1,6 +1,10 @@
 #ifndef PERF_TEST_LLVM_H
 #define PERF_TEST_LLVM_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stddef.h> /* for size_t */
 #include <stdbool.h> /* for bool */
 
@@ -20,4 +24,7 @@ enum test_llvm__testcase {
 int test_llvm__fetch_bpf_obj(void **p_obj_buf, size_t *p_obj_buf_sz,
 			     enum test_llvm__testcase index, bool force,
 			     bool *should_load_fail);
+#ifdef __cplusplus
+}
+#endif
 #endif
diff --git a/tools/perf/tests/make b/tools/perf/tests/make
index 08ed7f12cc37..0784748f1670 100644
--- a/tools/perf/tests/make
+++ b/tools/perf/tests/make
@@ -83,6 +83,7 @@ make_no_libbpf	    := NO_LIBBPF=1
 make_no_libcrypto   := NO_LIBCRYPTO=1
 make_with_babeltrace:= LIBBABELTRACE=1
 make_no_sdt	    := NO_SDT=1
+make_with_clangllvm := LIBCLANGLLVM=1
 make_tags           := tags
 make_cscope         := cscope
 make_help           := help
@@ -139,6 +140,7 @@ run += make_no_libbionic
 run += make_no_auxtrace
 run += make_no_libbpf
 run += make_with_babeltrace
+run += make_with_clangllvm
 run += make_help
 run += make_doc
 run += make_perf_o
@@ -278,7 +280,7 @@ endif
 
 MAKEFLAGS := --no-print-directory
 
-clean := @(cd $(PERF); $(MAKE_F) -s $(O_OPT) clean >/dev/null)
+clean := @(cd $(PERF); $(MAKE_F) -s $(O_OPT) clean >/dev/null && $(MAKE) -s $(O_OPT) -C ../build clean >/dev/null)
 
 $(run):
 	$(call clean)
diff --git a/tools/perf/tests/perf-hooks.c b/tools/perf/tests/perf-hooks.c
index 9338cb2c25ab..665ecc19671c 100644
--- a/tools/perf/tests/perf-hooks.c
+++ b/tools/perf/tests/perf-hooks.c
@@ -15,13 +15,13 @@ static void sigsegv_handler(int sig __maybe_unused)
 	exit(-1);
 }
 
-static int hook_flags;
 
-static void the_hook(void)
+static void the_hook(void *_hook_flags)
 {
+	int *hook_flags = _hook_flags;
 	int *p = NULL;
 
-	hook_flags = 1234;
+	*hook_flags = 1234;
 
 	/* Generate a segfault, test perf_hooks__recover */
 	*p = 0;
@@ -29,13 +29,17 @@ static void the_hook(void)
 
 int test__perf_hooks(int subtest __maybe_unused)
 {
+	int hook_flags = 0;
+
 	signal(SIGSEGV, sigsegv_handler);
-	perf_hooks__set_hook("test", the_hook);
+	perf_hooks__set_hook("test", the_hook, &hook_flags);
 	perf_hooks__invoke_test();
 
 	/* hook is triggered? */
-	if (hook_flags != 1234)
+	if (hook_flags != 1234) {
+		pr_debug("Setting failed: %d (%p)\n", hook_flags, &hook_flags);
 		return TEST_FAIL;
+	}
 
 	/* the buggy hook is removed? */
 	if (perf_hooks__get_hook("test"))
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 3a1f98f291ba..0d7b251305af 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -92,6 +92,9 @@ int test__sdt_event(int subtest);
 int test__is_printable_array(int subtest);
 int test__bitmap_print(int subtest);
 int test__perf_hooks(int subtest);
+int test__clang(int subtest);
+const char *test__clang_subtest_get_desc(int subtest);
+int test__clang_subtest_get_nr(void);
 
 #if defined(__arm__) || defined(__aarch64__)
 #ifdef HAVE_DWA