Commit 00b86691 authored by Wang Nan's avatar Wang Nan Committed by Arnaldo Carvalho de Melo
Browse files

perf clang: Add builtin clang support ant test case 



Add basic clang support in clang.cpp and test__clang() testcase. The
first testcase checks if builtin clang is able to generate LLVM IR.

tests/clang.c is a proxy. Real testcase resides in
utils/c++/clang-test.cpp in c++ and exports C interface to perf test
subsystem.

Test result:

   $ perf test -v clang
   51: builtin clang support                               :
   51.1: Test builtin clang compile C source to IR              :
   --- start ---
   test child forked, pid 13215
   test child finished with 0
   ---- end ----
   Test builtin clang support subtest 0: Ok

Committer note:

Make sure you've enabled CLANG and LLVM builtin support by setting
the LIBCLANGLLVM variable on the make command line, e.g.:

  make LIBCLANGLLVM=1 O=/tmp/build/perf -C tools/perf install-bin

Otherwise you'll get this when trying to do the 'perf test' call above:

  # perf test clang
  51: builtin clang support                      : Skip (not compiled in)
  #

Signed-off-by: default avatarWang Nan <wangnan0@huawei.com>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Joe Stringer <joe@ovn.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/20161126070354.141764-11-wangnan0@huawei.com


[ Removed "Test" from descriptions, redundant and already removed from all the other entries ]
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent d58ac0bf

tools/perf/tests/Build

+1 −0
Original line number Diff line number Diff line
@@ -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)

tools/perf/tests/builtin-test.c

+9 −0
Original line number Diff line number Diff line
@@ -233,6 +233,15 @@ static struct test generic_tests[] = { 
		.desc = "perf hooks",

		.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,

	},

tools/perf/tests/clang.c

0 → 100644
+42 −0
Original line number Diff line number Diff line 
#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",

	},

#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 __maybe_unused)

{

	if (i < 0 || i >= (int)ARRAY_SIZE(clang_testcase_table))

		return TEST_FAIL;

	return clang_testcase_table[i].func();

}

#endif

tools/perf/tests/tests.h

+3 −0
Original line number Diff line number Diff line
@@ -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_DWARF_UNWIND_SUPPORT

tools/perf/util/Build

+2 −0
Original line number Diff line number Diff line
@@ -126,6 +126,8 @@ endif 


libperf-y += perf-hooks.o



libperf-$(CONFIG_CXX) += c++/



CFLAGS_config.o   += -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"

# avoid compiler warnings in 32-bit mode

CFLAGS_genelf_debug.o  += -Wno-packed

CRA Git | Maintained and supported by SUSTech CRA and CCSE