Commit 7af3f3d5 authored by Wang Nan's avatar Wang Nan Committed by Arnaldo Carvalho de Melo
Browse files

perf test: Enhance the LLVM tests: add kbuild test 



This patch adds a kbuild testcase to check whether kernel headers can be
correctly found.

For example:
  # mv /lib/modules/4.3.0-rc5{,.bak}
  # perf test LLVM

    38: Test LLVM searching and compiling                        : Skip

  # perf test -v LLVM
  ...
  <stdin>:11:10: fatal error: 'uapi/linux/fs.h' file not found
  #include <uapi/linux/fs.h>
          ^
  1 error generated.
  ERROR:	unable to compile -
  Hint:	Check error message shown above.
  Hint:	You can also pre-compile it into .o using:
     		 clang -target bpf -O2 -c -
	 with proper -I and -D options.
  Failed to compile test case: 'Test kbuild searching'
  test child finished with -2

Signed-off-by: default avatarWang Nan <wangnan0@huawei.com>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1446817783-86722-7-git-send-email-wangnan0@huawei.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent b31de018

tools/perf/tests/Build

+8 −1
Original line number Diff line number Diff line
@@ -31,7 +31,7 @@ perf-y += sample-parsing.o 
perf-y += parse-no-sample-id-all.o

perf-y += kmod-path.o

perf-y += thread-map.o

perf-y += llvm.o llvm-src-base.o

perf-y += llvm.o llvm-src-base.o llvm-src-kbuild.o

perf-y += topology.o



$(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c
@@ -41,6 +41,13 @@ $(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c 
	$(Q)sed -e 's/"/\\"/g' -e 's/\(.*\)/"\1\\n"/g' $< >> $@

	$(Q)echo ';' >> $@



$(OUTPUT)tests/llvm-src-kbuild.c: tests/bpf-script-test-kbuild.c

	$(call rule_mkdir)

	$(Q)echo '#include <tests/llvm.h>' > $@

	$(Q)echo 'const char test_llvm__bpf_test_kbuild_prog[] =' >> $@

	$(Q)sed -e 's/"/\\"/g' -e 's/\(.*\)/"\1\\n"/g' $< >> $@

	$(Q)echo ';' >> $@



ifeq ($(ARCH),$(filter $(ARCH),x86 arm arm64))

perf-$(CONFIG_DWARF_UNWIND) += dwarf-unwind.o

endif

tools/perf/tests/bpf-script-test-kbuild.c

0 → 100644
+21 −0
Original line number Diff line number Diff line 
/*

 * bpf-script-test-kbuild.c

 * Test include from kernel header

 */

#ifndef LINUX_VERSION_CODE

# error Need LINUX_VERSION_CODE

# error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig'

#endif

#define SEC(NAME) __attribute__((section(NAME), used))



#include <uapi/linux/fs.h>

#include <uapi/asm/ptrace.h>



SEC("func=vfs_llseek")

int bpf_func__vfs_llseek(void *ctx)

{

	return 0;

}



char _license[] SEC("license") = "GPL";

int _version SEC("version") = LINUX_VERSION_CODE;

tools/perf/tests/llvm.c

+4 −0
Original line number Diff line number Diff line
@@ -40,6 +40,10 @@ static struct { 
		.source = test_llvm__bpf_base_prog,

		.desc = "Basic BPF llvm compiling test",

	},

	[LLVM_TESTCASE_KBUILD] = {

		.source = test_llvm__bpf_test_kbuild_prog,

		.desc = "Test kbuild searching",

	},

};

tools/perf/tests/llvm.h

+2 −0
Original line number Diff line number Diff line
@@ -5,9 +5,11 @@ 
#include <stdbool.h> /* for bool */



extern const char test_llvm__bpf_base_prog[];

extern const char test_llvm__bpf_test_kbuild_prog[];



enum test_llvm__testcase {

	LLVM_TESTCASE_BASE,

	LLVM_TESTCASE_KBUILD,

	__LLVM_TESTCASE_MAX,

};

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