sandboxed-api/sandboxed_api/tools/clang_generator/emitter_test.cc

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// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "sandboxed_api/tools/clang_generator/emitter.h"
#include <initializer_list>
#include <memory>
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "absl/status/statusor.h"
#include "absl/strings/string_view.h"
#include "sandboxed_api/tools/clang_generator/frontend_action_test_util.h"
#include "sandboxed_api/tools/clang_generator/generator.h"
#include "sandboxed_api/util/status_matchers.h"
namespace sapi {
namespace {
using ::testing::ElementsAre;
using ::testing::IsEmpty;
using ::testing::MatchesRegex;
using ::testing::SizeIs;
using ::testing::StrEq;
using ::testing::StrNe;
class EmitterForTesting : public Emitter {
public:
std::vector<std::string> SpellingsForNS(const std::string& ns_name) {
std::vector<std::string> result;
for (const RenderedType* rt : rendered_types_ordered_) {
if (rt->ns_name == ns_name) {
result.push_back(rt->spelling);
}
}
return result;
}
const std::vector<std::string>& GetRenderedFunctions() {
return rendered_functions_ordered_;
}
};
class EmitterTest : public FrontendActionTest {};
TEST_F(EmitterTest, BasicFunctionality) {
GeneratorOptions options;
options.set_function_names<std::initializer_list<std::string>>(
{"ExposedFunction"});
EmitterForTesting emitter;
ASSERT_THAT(
RunFrontendAction(R"(extern "C" void ExposedFunction() {})",
std::make_unique<GeneratorAction>(emitter, options)),
IsOk());
EXPECT_THAT(emitter.GetRenderedFunctions(), SizeIs(1));
absl::StatusOr<std::string> header = emitter.EmitHeader(options);
EXPECT_THAT(header, IsOk());
}
TEST_F(EmitterTest, RelatedTypes) {
EmitterForTesting emitter;
ASSERT_THAT(
RunFrontendAction(
R"(namespace std {
using size_t = unsigned long;
} // namespace std
using std::size_t;
typedef enum { kRed, kGreen, kBlue } Color;
struct Channel {
Color color;
size_t width;
size_t height;
};
extern "C" void Colorize(Channel* chan);
typedef struct { int member; } MyStruct;
extern "C" void Structize(MyStruct* s);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(emitter.GetRenderedFunctions(), SizeIs(2));
// Types from "std" should be skipped
EXPECT_THAT(emitter.SpellingsForNS("std"), IsEmpty());
EXPECT_THAT(UglifyAll(emitter.SpellingsForNS("")),
ElementsAre("typedef enum { kRed, kGreen, kBlue } Color",
"struct Channel {"
" Color color;"
" size_t width;"
" size_t height; }",
"typedef struct { int member; } MyStruct"));
}
TEST_F(EmitterTest, CollectFunctionPointer) {
EmitterForTesting emitter;
EXPECT_THAT(
RunFrontendAction(
R"(typedef void (callback_t)(void*);
struct HandlerData {
int member;
callback_t* cb;
};
extern "C" int Structize(HandlerData*);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(emitter.GetRenderedFunctions(), SizeIs(1));
EXPECT_THAT(
UglifyAll(emitter.SpellingsForNS("")),
ElementsAre("typedef void (callback_t)(void *)",
"struct HandlerData { int member; callback_t *cb; }"));
}
TEST_F(EmitterTest, TypedefNames) {
EmitterForTesting emitter;
ASSERT_THAT(
RunFrontendAction(
R"(typedef enum { kNone, kSome } E;
struct A { E member; };
typedef struct { int member; } B;
typedef struct tagC { int member; } C;
extern "C" void Colorize(A*, B*, C*);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(
UglifyAll(emitter.SpellingsForNS("")),
ElementsAre("typedef enum { kNone, kSome } E", "struct A { E member; }",
"typedef struct { int member; } B",
"struct tagC { int member; }", "typedef struct tagC C"));
}
TEST_F(EmitterTest, NestedStruct) {
EmitterForTesting emitter;
ASSERT_THAT(
RunFrontendAction(
R"(struct A {
struct B { int number; };
B b;
int data;
};
extern "C" void Structize(A* s);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(UglifyAll(emitter.SpellingsForNS("")),
ElementsAre("struct A {"
" struct B { int number; };"
" B b;"
" int data; }"));
}
TEST_F(EmitterTest, NestedAnonymousStruct) {
EmitterForTesting emitter;
ASSERT_THAT(
RunFrontendAction(
R"(struct A {
struct { int number; } b;
int data;
};
extern "C" void Structize(A* s);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(UglifyAll(emitter.SpellingsForNS("")),
ElementsAre("struct A {"
" struct { int number; } b;"
" int data; }"));
}
TEST_F(EmitterTest, ParentNotCollected) {
EmitterForTesting emitter;
ASSERT_THAT(
RunFrontendAction(
R"(struct A {
struct B { int number; };
B b;
int data;
};
extern "C" void Structize(A::B* s);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(UglifyAll(emitter.SpellingsForNS("")),
ElementsAre("struct A {"
" struct B { int number; };"
" B b;"
" int data; }"));
}
TEST_F(EmitterTest, StructForwardDecl) {
EmitterForTesting emitter;
ASSERT_THAT(
RunFrontendAction(
R"(struct A;
extern "C" void UsingForwardDeclaredStruct(A* s);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(UglifyAll(emitter.SpellingsForNS("")), ElementsAre("struct A"));
}
TEST_F(EmitterTest, AggregateStructWithDefaultedMembers) {
EmitterForTesting emitter;
ASSERT_THAT(
RunFrontendAction(
R"(struct A {
int a = 0;
int b = 42;
};
extern "C" void AggregateStruct(A* s);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(UglifyAll(emitter.SpellingsForNS("")),
ElementsAre("struct A {"
" int a = 0;"
" int b = 42; }"));
}
TEST_F(EmitterTest, AggregateStructWithMethods) {
EmitterForTesting emitter;
ASSERT_THAT(
RunFrontendAction(
R"(struct A {
int a = 0;
int b = 42;
int my_mem_fn();
};
extern "C" void AggregateStruct(A* s);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
// Expect a forward decl in this case
EXPECT_THAT(UglifyAll(emitter.SpellingsForNS("")), ElementsAre("struct A"));
}
TEST_F(EmitterTest, RemoveQualifiers) {
EmitterForTesting emitter;
ASSERT_THAT(
RunFrontendAction(
R"(struct A { int data; };
extern "C" void Structize(const A* in, A* out);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(UglifyAll(emitter.SpellingsForNS("")),
ElementsAre("struct A { int data; }"));
}
TEST_F(EmitterTest, StructByValueSkipsFunction) {
EmitterForTesting emitter;
EXPECT_THAT(
RunFrontendAction(
R"(struct A { int data; };
extern "C" int Structize(A a);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(emitter.GetRenderedFunctions(), IsEmpty());
}
TEST_F(EmitterTest, ReturnStructByValueSkipsFunction) {
EmitterForTesting emitter;
EXPECT_THAT(
RunFrontendAction(
R"(struct A { int data; };
extern "C" A Structize();)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(emitter.GetRenderedFunctions(), IsEmpty());
}
TEST_F(EmitterTest, TypedefStructByValueSkipsFunction) {
EmitterForTesting emitter;
EXPECT_THAT(
RunFrontendAction(
R"(typedef struct { int data; } A;
extern "C" int Structize(A a);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(emitter.GetRenderedFunctions(), IsEmpty());
}
TEST_F(EmitterTest, CollectTypedefPointerType) {
EmitterForTesting emitter;
EXPECT_THAT(
RunFrontendAction(
R"(typedef struct _KernelProfileRecord {
int member;
}* KernelProfileRecord;
extern "C" const KernelProfileRecord*
GetOpenCLKernelProfileRecords(const int, long long int*);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(emitter.GetRenderedFunctions(), SizeIs(1));
EXPECT_THAT(
UglifyAll(emitter.SpellingsForNS("")),
ElementsAre("struct _KernelProfileRecord { int member; }",
"typedef struct _KernelProfileRecord *KernelProfileRecord"));
}
TEST_F(EmitterTest, TypedefTypeDependencies) {
EmitterForTesting emitter;
EXPECT_THAT(
RunFrontendAction(
R"(typedef bool some_other_unused;
using size_t = long long int;
typedef struct _Image Image;
typedef size_t (*StreamHandler)(const Image*, const void*,
const size_t);
enum unrelated_unused { NONE, SOME };
struct _Image {
StreamHandler stream;
int size;
};
extern "C" void Process(StreamHandler handler);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(emitter.GetRenderedFunctions(), SizeIs(1));
EXPECT_THAT(UglifyAll(emitter.SpellingsForNS("")),
ElementsAre("using size_t = long long", "struct _Image",
"typedef struct _Image Image",
"typedef size_t (*StreamHandler)(const Image *, "
"const void *, const size_t)",
"struct _Image {"
" StreamHandler stream;"
" int size; }"));
}
TEST_F(EmitterTest, OmitDependentTypes) {
EmitterForTesting emitter;
EXPECT_THAT(
RunFrontendAction(
R"(template <typename T>
struct Callback {
typedef void (T::*MemberSignature)();
MemberSignature pointer;
};
struct S : public Callback<S> {
void Callable() {}
};
extern "C" void Invoke(S::MemberSignature* cb);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(emitter.GetRenderedFunctions(), SizeIs(1));
EXPECT_THAT(UglifyAll(emitter.SpellingsForNS("")), IsEmpty());
}
TEST_F(EmitterTest, SkipAbseilInternals) {
EmitterForTesting emitter;
EXPECT_THAT(
RunFrontendAction(
R"(namespace absl::internal {
typedef int Int;
}
extern "C" void TakesAnInternalInt(absl::internal::Int);
extern "C" void AbslInternalTakingAnInt(int);)",
std::make_unique<GeneratorAction>(emitter, GeneratorOptions())),
IsOk());
EXPECT_THAT(emitter.GetRenderedFunctions(), SizeIs(1));
EXPECT_THAT(UglifyAll(emitter.SpellingsForNS("")), IsEmpty());
}
TEST(IncludeGuard, CreatesRandomizedGuardForEmptyFilename) {
// Copybara will transform the string. This is intentional.
constexpr absl::string_view kGeneratedHeaderPrefix =
"SANDBOXED_API_GENERATED_HEADER_";
const std::string include_guard = GetIncludeGuard("");
EXPECT_THAT(include_guard, MatchesRegex(absl::StrCat(kGeneratedHeaderPrefix,
R"([0-9A-F]+_)")));
EXPECT_THAT(GetIncludeGuard(""), StrNe(include_guard));
}
TEST(IncludeGuard, BasicFunctionality) {
EXPECT_THAT(GetIncludeGuard("boost/graph/compressed_sparse_row_graph.hpp"),
StrEq("BOOST_GRAPH_COMPRESSED_SPARSE_ROW_GRAPH_HPP_"));
// "SAPI_" prefix is there to avoid generating guards starting with "_"
EXPECT_THAT(GetIncludeGuard("/usr/include/unistd.h"),
StrEq("SAPI_USR_INCLUDE_UNISTD_H_"));
}
TEST(IncludeGuard, AvoidReservedIdentifiers) {
EXPECT_THAT(GetIncludeGuard("9p.h"), StrEq("SAPI_9P_H_"));
EXPECT_THAT(GetIncludeGuard("double__under.h"), StrEq("DOUBLE_UNDER_H_"));
EXPECT_THAT(GetIncludeGuard("_single.h"), StrEq("SAPI_SINGLE_H_"));
EXPECT_THAT(GetIncludeGuard("__double.h"), StrEq("SAPI_DOUBLE_H_"));
}
} // namespace
} // namespace sapi