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Groups > linux.kernel > #1522308

[PATCH 32/34] perf clang: Include helpers to BPF scripts

From Wang Nan <wangnan0@huawei.com>
Newsgroups linux.kernel
Subject [PATCH 32/34] perf clang: Include helpers to BPF scripts
Date 2016-11-15 05:20 +0100
Message-ID <sDDnY-8py-5@gated-at.bofh.it> (permalink)
References <sDDeh-8kE-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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Automatically include some commonly used macros and struct definitions
into BPF scripts. Script writers are no longer required to define
'SEC' and 'struct bpf_map_def' in each of their scripts.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Arnaldo 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: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
---
 tools/perf/tests/bpf-script-example.c         |  2 +-
 tools/perf/tests/bpf-script-test-kbuild.c     |  2 ++
 tools/perf/tests/bpf-script-test-prologue.c   |  4 +++-
 tools/perf/tests/bpf-script-test-relocation.c |  3 +--
 tools/perf/util/c++/Build                     |  1 +
 tools/perf/util/c++/bpf-helper-str.c          | 15 +++++++++++++++
 tools/perf/util/c++/clang-bpf-includes.h      |  1 +
 tools/perf/util/c++/clang.cpp                 |  1 +
 8 files changed, 25 insertions(+), 4 deletions(-)
 create mode 100644 tools/perf/util/c++/bpf-helper-str.c

diff --git a/tools/perf/tests/bpf-script-example.c b/tools/perf/tests/bpf-script-example.c
index 42dc341..e60bebf 100644
--- a/tools/perf/tests/bpf-script-example.c
+++ b/tools/perf/tests/bpf-script-example.c
@@ -9,6 +9,7 @@
 #define BPF_ANY 0
 #define BPF_MAP_TYPE_ARRAY 2
 
+#ifndef BUILTIN_CLANG_DEFAULT_INCLUDE
 struct bpf_map_def {
 	unsigned int type;
 	unsigned int key_size;
@@ -18,7 +19,6 @@ struct bpf_map_def {
 
 #define SEC(NAME) __attribute__((section(NAME), used))
 
-#ifndef BUILTIN_CLANG_DEFAULT_INCLUDE
 #define BPF_FUNC_map_lookup_elem 1
 #define BPF_FUNC_map_update_elem 2
 
diff --git a/tools/perf/tests/bpf-script-test-kbuild.c b/tools/perf/tests/bpf-script-test-kbuild.c
index 3626924..f1b48a4 100644
--- a/tools/perf/tests/bpf-script-test-kbuild.c
+++ b/tools/perf/tests/bpf-script-test-kbuild.c
@@ -6,7 +6,9 @@
 # error Need LINUX_VERSION_CODE
 # error Example: for 4.2 kernel, put 'clang-opt="-DLINUX_VERSION_CODE=0x40200" into llvm section of ~/.perfconfig'
 #endif
+#ifndef BUILTIN_CLANG_DEFAULT_INCLUDE
 #define SEC(NAME) __attribute__((section(NAME), used))
+#endif
 
 #include <uapi/linux/fs.h>
 #include <uapi/asm/ptrace.h>
diff --git a/tools/perf/tests/bpf-script-test-prologue.c b/tools/perf/tests/bpf-script-test-prologue.c
index ada812b..e2176c9 100644
--- a/tools/perf/tests/bpf-script-test-prologue.c
+++ b/tools/perf/tests/bpf-script-test-prologue.c
@@ -6,7 +6,6 @@
 # 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>
 
@@ -14,6 +13,9 @@
 #define FMODE_WRITE		0x2
 
 #ifndef BUILTIN_CLANG_DEFAULT_INCLUDE
+
+#define SEC(NAME) __attribute__((section(NAME), used))
+
 static void (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) =
 	(void *) 6;
 #endif
diff --git a/tools/perf/tests/bpf-script-test-relocation.c b/tools/perf/tests/bpf-script-test-relocation.c
index 57c96a3..bb54926 100644
--- a/tools/perf/tests/bpf-script-test-relocation.c
+++ b/tools/perf/tests/bpf-script-test-relocation.c
@@ -9,6 +9,7 @@
 #define BPF_ANY 0
 #define BPF_MAP_TYPE_ARRAY 2
 
+#ifndef BUILTIN_CLANG_DEFAULT_INCLUDE
 struct bpf_map_def {
 	unsigned int type;
 	unsigned int key_size;
@@ -17,8 +18,6 @@ struct bpf_map_def {
 };
 
 #define SEC(NAME) __attribute__((section(NAME), used))
-
-#ifndef BUILTIN_CLANG_DEFAULT_INCLUDE
 #define BPF_FUNC_map_lookup_elem 1
 #define BPF_FUNC_map_update_elem 2
 
diff --git a/tools/perf/util/c++/Build b/tools/perf/util/c++/Build
index bd71abf..faa0268 100644
--- a/tools/perf/util/c++/Build
+++ b/tools/perf/util/c++/Build
@@ -1,3 +1,4 @@
 libperf-$(CONFIG_CLANGLLVM) += clang.o
 libperf-$(CONFIG_CLANGLLVM) += clang-test.o
 libperf-$(CONFIG_CLANGLLVM) += bpf-funcs-str.o
+libperf-$(CONFIG_CLANGLLVM) += bpf-helper-str.o
diff --git a/tools/perf/util/c++/bpf-helper-str.c b/tools/perf/util/c++/bpf-helper-str.c
new file mode 100644
index 0000000..17f915c
--- /dev/null
+++ b/tools/perf/util/c++/bpf-helper-str.c
@@ -0,0 +1,15 @@
+#include "clang-bpf-includes.h"
+const char clang_builtin_bpf_helper_str[] =
+"#ifdef BUILTIN_CLANG_DEFAULT_INCLUDE\n"
+"#ifndef BPF_HELPER_DEFINED\n"
+"#define BPF_HELPER_DEFINED\n"
+"struct bpf_map_def {\n"
+"	unsigned int type;\n"
+"	unsigned int key_size;\n"
+"	unsigned int value_size;\n"
+"	unsigned int max_entries;\n"
+"};\n"
+"#define SEC(NAME) __attribute__((section(NAME), used))\n"
+"#endif\n"
+"#endif"
+;
diff --git a/tools/perf/util/c++/clang-bpf-includes.h b/tools/perf/util/c++/clang-bpf-includes.h
index 385a5bb..577b40c 100644
--- a/tools/perf/util/c++/clang-bpf-includes.h
+++ b/tools/perf/util/c++/clang-bpf-includes.h
@@ -5,6 +5,7 @@ extern "C" {
 #endif
 
 extern const char clang_builtin_bpf_funcs_str[];
+extern const char clang_builtin_bpf_helper_str[];
 
 #ifdef __cplusplus
 }
diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp
index 411a38c..db31fb2 100644
--- a/tools/perf/util/c++/clang.cpp
+++ b/tools/perf/util/c++/clang.cpp
@@ -48,6 +48,7 @@ static struct BPFHeader {
 	llvm::StringRef Content;
 } BPFHeaders[] = {
 	{"/virtual/bpf-funcs.h", clang_builtin_bpf_funcs_str},
+	{"/virtual/bpf-helper.h", clang_builtin_bpf_helper_str},
 };
 
 static std::unique_ptr<llvm::LLVMContext> LLVMCtx;
-- 
2.10.1

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[PATCH 00/34] perf clang: Builtin clang and perfhook support Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:10 +0100
  [PATCH 21/34] perf clang: Pass CFLAGS to builtin clang Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:10 +0100
  [PATCH 33/34] perf clang builtin: Define hook helpers by default Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:10 +0100
  [PATCH 28/34] perf clang jit: Access BPF map Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:10 +0100
  [PATCH 16/34] perf clang: Allow passing CFLAGS to builtin clang Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:10 +0100
  [PATCH 23/34] perf clang jit: Insignt BPF and JIT functions in a Module Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:10 +0100
  [PATCH 02/34] perf record: Fix segfault when running with suid and kptr_restrict is 1 Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:10 +0100
  [PATCH 06/34] tools lib bpf: Add private field for bpf_object Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:10 +0100
  [PATCH 03/34] tools perf: Add missing struct defeinition in probe_event.h Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 01/34] perf tools: Fix kernel version error in ubuntu Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 24/34] perf clang jit: add PerfModule::doJIT to JIT perfhook functions Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 30/34] perf clang: Link BPF functions declaration into perf Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 11/34] tools build: Add feature detection for LLVM Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 32/34] perf clang: Include helpers to BPF scripts Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 05/34] tools lib bpf: Add missing bpf map functions Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
    Re: [PATCH 05/34] tools lib bpf: Add missing bpf map functions "Wangnan (F)" <wangnan0@huawei.com> - 2016-11-17 04:30 +0100
  [PATCH 31/34] perf clang: Declare BPF functions for BPF scripts automatically Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 29/34] perf clang jit: Allow jitted perf hook access BPF maps Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 34/34] perf clang git: Export getpid() to perf hook Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 09/34] perf tools: Pass context to perf hook functions Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 22/34] perf clang jit: Wrap llvm::Module using PerfModule Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 25/34] perf clang jit: Export functions for jitted code Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 20/34] perf clang: Pass full path to builtin clang Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 18/34] perf clang: Support compile IR to BPF object and add testcase Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 15/34] perf clang: Use real file system for #include Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 27/34] perf clang jit: Collect the lowest address in maps section as map_base Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 17/34] perf clang: Update test case to use real BPF script Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 13/34] perf build: Add clang and llvm compile and linking support Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 12/34] tools build: Add feature detection for clang Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 08/34] perf tools: Introduce perf hooks Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 07/34] tools lib bpf: Retrive bpf_map through offset of bpf_map_def Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 26/34] perf clang jit: Actually JIT and hook in bpf loader Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 14/34] perf clang: Add builtin clang support ant test case Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 10/34] perf llvm: Extract helpers in llvm-utils.c Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  [PATCH 19/34] perf clang: Compile BPF script use builtin clang support Wang Nan <wangnan0@huawei.com> - 2016-11-15 05:20 +0100
  Re: [PATCH 00/34] perf clang: Builtin clang and perfhook support "Wangnan (F)" <wangnan0@huawei.com> - 2016-11-15 05:40 +0100

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