From: tip-bot for Wang Nan <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: hekuang@huawei.com, jolsa@kernel.org, tglx@linutronix.de,
joe@ovn.org, hpa@zytor.com, ast@fb.com,
linux-kernel@vger.kernel.org, acme@redhat.com,
wangnan0@huawei.com, mingo@kernel.org, lizefan@huawei.com
Subject: [tip:perf/core] perf clang: Add builtin clang support ant test case
Date: Tue, 6 Dec 2016 00:23:59 -0800 [thread overview]
Message-ID: <tip-00b86691c77c6576861b82a3cfe4d609800758fe@git.kernel.org> (raw)
In-Reply-To: <20161126070354.141764-11-wangnan0@huawei.com>
Commit-ID: 00b86691c77c6576861b82a3cfe4d609800758fe
Gitweb: http://git.kernel.org/tip/00b86691c77c6576861b82a3cfe4d609800758fe
Author: Wang Nan <wangnan0@huawei.com>
AuthorDate: Sat, 26 Nov 2016 07:03:34 +0000
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 5 Dec 2016 15:51:43 -0300
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: Wang Nan <wangnan0@huawei.com>
Tested-by: 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: 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: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/tests/Build | 1 +
tools/perf/tests/builtin-test.c | 9 ++++
tools/perf/tests/clang.c | 42 +++++++++++++++++
tools/perf/tests/tests.h | 3 ++
tools/perf/util/Build | 2 +
tools/perf/util/c++/Build | 2 +
tools/perf/util/c++/clang-c.h | 16 +++++++
tools/perf/util/c++/clang-test.cpp | 31 ++++++++++++
tools/perf/util/c++/clang.cpp | 96 ++++++++++++++++++++++++++++++++++++++
tools/perf/util/c++/clang.h | 16 +++++++
10 files changed, 218 insertions(+)
diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build
index af3ec94..6676c2d 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 d1bec04..2360520 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 0000000..636d6d0
--- /dev/null
+++ b/tools/perf/tests/clang.c
@@ -0,0 +1,42 @@
+#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
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 3a1f98f..0d7b251 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_DWARF_UNWIND_SUPPORT
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index bdad82a..3840e3a 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -126,6 +126,8 @@ endif
libperf-y += perf-hooks.o
+libperf-$(CONFIG_CXX) += c++/
+
CFLAGS_config.o += -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
# avoid compiler warnings in 32-bit mode
CFLAGS_genelf_debug.o += -Wno-packed
diff --git a/tools/perf/util/c++/Build b/tools/perf/util/c++/Build
new file mode 100644
index 0000000..988fef1
--- /dev/null
+++ b/tools/perf/util/c++/Build
@@ -0,0 +1,2 @@
+libperf-$(CONFIG_CLANGLLVM) += clang.o
+libperf-$(CONFIG_CLANGLLVM) += clang-test.o
diff --git a/tools/perf/util/c++/clang-c.h b/tools/perf/util/c++/clang-c.h
new file mode 100644
index 0000000..dcde4b5
--- /dev/null
+++ b/tools/perf/util/c++/clang-c.h
@@ -0,0 +1,16 @@
+#ifndef PERF_UTIL_CLANG_C_H
+#define PERF_UTIL_CLANG_C_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern void perf_clang__init(void);
+extern void perf_clang__cleanup(void);
+
+extern int test__clang_to_IR(void);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/tools/perf/util/c++/clang-test.cpp b/tools/perf/util/c++/clang-test.cpp
new file mode 100644
index 0000000..3da6bfa
--- /dev/null
+++ b/tools/perf/util/c++/clang-test.cpp
@@ -0,0 +1,31 @@
+#include "clang.h"
+#include "clang-c.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/LLVMContext.h"
+
+class perf_clang_scope {
+public:
+ explicit perf_clang_scope() {perf_clang__init();}
+ ~perf_clang_scope() {perf_clang__cleanup();}
+};
+
+extern "C" {
+
+int test__clang_to_IR(void)
+{
+ perf_clang_scope _scope;
+
+ std::unique_ptr<llvm::Module> M =
+ perf::getModuleFromSource("perf-test.c",
+ "int myfunc(void) {return 1;}");
+
+ if (!M)
+ return -1;
+
+ for (llvm::Function& F : *M)
+ if (F.getName() == "myfunc")
+ return 0;
+ return -1;
+}
+
+}
diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp
new file mode 100644
index 0000000..c17b117
--- /dev/null
+++ b/tools/perf/util/c++/clang.cpp
@@ -0,0 +1,96 @@
+/*
+ * llvm C frontend for perf. Support dynamically compile C file
+ *
+ * Inspired by clang example code:
+ * http://llvm.org/svn/llvm-project/cfe/trunk/examples/clang-interpreter/main.cpp
+ *
+ * Copyright (C) 2016 Wang Nan <wangnan0@huawei.com>
+ * Copyright (C) 2016 Huawei Inc.
+ */
+
+#include "clang/CodeGen/CodeGenAction.h"
+#include "clang/Frontend/CompilerInvocation.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Frontend/TextDiagnosticPrinter.h"
+#include "clang/Tooling/Tooling.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Option/Option.h"
+#include "llvm/Support/ManagedStatic.h"
+#include <memory>
+
+#include "clang.h"
+#include "clang-c.h"
+
+namespace perf {
+
+static std::unique_ptr<llvm::LLVMContext> LLVMCtx;
+
+using namespace clang;
+
+static vfs::InMemoryFileSystem *
+buildVFS(StringRef& Name, StringRef& Content)
+{
+ vfs::InMemoryFileSystem *VFS = new vfs::InMemoryFileSystem(true);
+ VFS->addFile(Twine(Name), 0, llvm::MemoryBuffer::getMemBuffer(Content));
+ return VFS;
+}
+
+static CompilerInvocation *
+createCompilerInvocation(StringRef& Path, DiagnosticsEngine& Diags)
+{
+ llvm::opt::ArgStringList CCArgs {
+ "-cc1",
+ "-triple", "bpf-pc-linux",
+ "-fsyntax-only",
+ "-ferror-limit", "19",
+ "-fmessage-length", "127",
+ "-O2",
+ "-nostdsysteminc",
+ "-nobuiltininc",
+ "-vectorize-loops",
+ "-vectorize-slp",
+ "-Wno-unused-value",
+ "-Wno-pointer-sign",
+ "-x", "c"};
+ CompilerInvocation *CI = tooling::newInvocation(&Diags, CCArgs);
+
+ FrontendOptions& Opts = CI->getFrontendOpts();
+ Opts.Inputs.clear();
+ Opts.Inputs.emplace_back(Path, IK_C);
+ return CI;
+}
+
+std::unique_ptr<llvm::Module>
+getModuleFromSource(StringRef Name, StringRef Content)
+{
+ CompilerInstance Clang;
+ Clang.createDiagnostics();
+
+ IntrusiveRefCntPtr<vfs::FileSystem> VFS = buildVFS(Name, Content);
+ Clang.setVirtualFileSystem(&*VFS);
+
+ IntrusiveRefCntPtr<CompilerInvocation> CI =
+ createCompilerInvocation(Name, Clang.getDiagnostics());
+ Clang.setInvocation(&*CI);
+
+ std::unique_ptr<CodeGenAction> Act(new EmitLLVMOnlyAction(&*LLVMCtx));
+ if (!Clang.ExecuteAction(*Act))
+ return std::unique_ptr<llvm::Module>(nullptr);
+
+ return Act->takeModule();
+}
+
+}
+
+extern "C" {
+void perf_clang__init(void)
+{
+ perf::LLVMCtx.reset(new llvm::LLVMContext());
+}
+
+void perf_clang__cleanup(void)
+{
+ perf::LLVMCtx.reset(nullptr);
+ llvm::llvm_shutdown();
+}
+}
diff --git a/tools/perf/util/c++/clang.h b/tools/perf/util/c++/clang.h
new file mode 100644
index 0000000..f64483b
--- /dev/null
+++ b/tools/perf/util/c++/clang.h
@@ -0,0 +1,16 @@
+#ifndef PERF_UTIL_CLANG_H
+#define PERF_UTIL_CLANG_H
+
+#include "llvm/ADT/StringRef.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include <memory>
+namespace perf {
+
+using namespace llvm;
+
+std::unique_ptr<Module>
+getModuleFromSource(StringRef Name, StringRef Content);
+
+}
+#endif
next prev parent reply other threads:[~2016-12-06 8:24 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-26 7:03 [PATCH v3 00/30] perf clang: Builtin clang and perfhook support Wang Nan
2016-11-26 7:03 ` [PATCH v3 01/30] tools lib bpf: Add missing BPF functions Wang Nan
2016-11-26 17:10 ` Alexei Starovoitov
2016-12-02 10:37 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 02/30] tools lib bpf: Add private field for bpf_object Wang Nan
2016-11-26 17:11 ` Alexei Starovoitov
2016-12-02 10:37 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 03/30] tools lib bpf: Retrive bpf_map through offset of bpf_map_def Wang Nan
2016-11-26 17:12 ` Alexei Starovoitov
2016-12-02 10:38 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 04/30] perf tools: Introduce perf hooks Wang Nan
2016-12-02 10:38 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 05/30] perf tools: Pass context to perf hook functions Wang Nan
2016-12-06 8:21 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 06/30] perf llvm: Extract helpers in llvm-utils.c Wang Nan
2016-12-06 8:21 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 07/30] tools build: Add feature detection for LLVM Wang Nan
2016-12-06 8:22 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 08/30] tools build: Add feature detection for clang Wang Nan
2016-12-06 8:22 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 09/30] perf build: Add clang and llvm compile and linking support Wang Nan
2016-12-06 8:23 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 10/30] perf clang: Add builtin clang support ant test case Wang Nan
2016-11-26 17:17 ` Alexei Starovoitov
2016-11-28 7:41 ` Wangnan (F)
2016-12-02 15:44 ` Arnaldo Carvalho de Melo
2016-12-05 2:36 ` Wangnan (F)
2016-12-05 4:41 ` Wangnan (F)
2017-01-17 13:38 ` Arnaldo Carvalho de Melo
2016-12-05 16:51 ` Alexei Starovoitov
2016-12-05 21:02 ` Arnaldo Carvalho de Melo
2016-12-05 21:48 ` Arnaldo Carvalho de Melo
2016-12-06 2:07 ` Wangnan (F)
2016-12-06 13:43 ` Arnaldo Carvalho de Melo
2016-12-06 19:19 ` Arnaldo Carvalho de Melo
2016-12-06 21:02 ` Arnaldo Carvalho de Melo
2016-12-06 8:23 ` tip-bot for Wang Nan [this message]
2016-11-26 7:03 ` [PATCH v3 11/30] perf clang: Use real file system for #include Wang Nan
2016-12-06 8:24 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 12/30] perf clang: Allow passing CFLAGS to builtin clang Wang Nan
2016-12-06 8:25 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 13/30] perf clang: Update test case to use real BPF script Wang Nan
2016-12-06 8:25 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 14/30] perf clang: Support compile IR to BPF object and add testcase Wang Nan
2016-11-26 17:25 ` Alexei Starovoitov
2016-11-28 6:32 ` Wangnan (F)
2016-11-28 10:31 ` Wangnan (F)
2016-11-28 19:33 ` Alexei Starovoitov
2016-12-06 8:26 ` [tip:perf/core] " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 15/30] perf clang: Compile BPF script use builtin clang support Wang Nan
2016-12-06 8:26 ` [tip:perf/core] perf clang: Compile BPF script using " tip-bot for Wang Nan
2016-11-26 7:03 ` [PATCH v3 16/30] perf clang: Pass full path to builtin clang Wang Nan
2016-11-26 7:03 ` [PATCH v3 17/30] perf clang: Pass CFLAGS " Wang Nan
2016-11-26 7:03 ` [PATCH v3 18/30] perf clang jit: Wrap llvm::Module using PerfModule Wang Nan
2016-11-26 7:03 ` [PATCH v3 19/30] perf clang jit: Insignt BPF and JIT functions in a Module Wang Nan
2016-11-26 17:32 ` Alexei Starovoitov
2016-11-26 7:03 ` [PATCH v3 20/30] perf clang jit: add PerfModule::doJIT to JIT perfhook functions Wang Nan
2016-11-26 17:29 ` Alexei Starovoitov
2016-11-28 6:42 ` Wangnan (F)
2016-11-26 7:03 ` [PATCH v3 21/30] perf clang jit: Export functions for jitted code Wang Nan
2016-11-26 7:03 ` [PATCH v3 22/30] perf clang jit: Actually JIT and hook in bpf loader Wang Nan
2016-11-26 7:03 ` [PATCH v3 23/30] perf clang jit: Collect the lowest address in maps section as map_base Wang Nan
2016-11-26 7:03 ` [PATCH v3 24/30] perf clang jit: Retrive fd of BPF map from its offset Wang Nan
2016-11-26 7:03 ` [PATCH v3 25/30] perf clang jit: Allow jitted perf hook access BPF maps Wang Nan
2016-11-26 17:09 ` Alexei Starovoitov
2016-11-26 7:03 ` [PATCH v3 26/30] perf clang: Link BPF functions declaration into perf Wang Nan
2016-11-26 17:40 ` Alexei Starovoitov
2016-11-30 16:12 ` Arnaldo Carvalho de Melo
2016-12-01 1:56 ` [PATCH v3 26/30 - cleanup] " Wang Nan
2016-11-26 7:03 ` [PATCH v3 27/30] perf clang: Declare BPF functions for BPF scripts automatically Wang Nan
2016-11-26 7:03 ` [PATCH v3 28/30] perf clang: Include helpers to BPF scripts Wang Nan
2016-11-26 7:03 ` [PATCH v3 29/30] perf clang builtin: Define hook helpers by default Wang Nan
2016-11-26 7:03 ` [PATCH v3 30/30] perf clang jit: Export getpid() to perf hook Wang Nan
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