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/*
* Copyright (C) 2020 The Android Open Source Project
*
* 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
*
* http://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 <binder/IPCThreadState.h>
#include <binder/Parcel.h>
#include <binder/Status.h>
#include <cutils/ashmem.h>
#include <gtest/gtest.h>
using android::BBinder;
using android::IBinder;
using android::IPCThreadState;
using android::OK;
using android::Parcel;
using android::sp;
using android::status_t;
using android::String16;
using android::String8;
using android::binder::Status;
TEST(Parcel, NonNullTerminatedString8) {
String8 kTestString = String8("test-is-good");
// write non-null terminated string
Parcel p;
p.writeString8(kTestString);
p.setDataPosition(0);
// BAD! assumption of wire format for test
// write over length of string
p.writeInt32(kTestString.size() - 2);
p.setDataPosition(0);
String8 output;
EXPECT_NE(OK, p.readString8(&output));
EXPECT_EQ(output.size(), 0);
}
TEST(Parcel, NonNullTerminatedString16) {
String16 kTestString = String16("test-is-good");
// write non-null terminated string
Parcel p;
p.writeString16(kTestString);
p.setDataPosition(0);
// BAD! assumption of wire format for test
// write over length of string
p.writeInt32(kTestString.size() - 2);
p.setDataPosition(0);
String16 output;
EXPECT_NE(OK, p.readString16(&output));
EXPECT_EQ(output.size(), 0);
}
TEST(Parcel, EnforceNoDataAvail) {
const int32_t kTestInt = 42;
const String8 kTestString = String8("test-is-good");
Parcel p;
p.writeInt32(kTestInt);
p.writeString8(kTestString);
p.setDataPosition(0);
EXPECT_EQ(kTestInt, p.readInt32());
EXPECT_EQ(p.enforceNoDataAvail().exceptionCode(), Status::Exception::EX_BAD_PARCELABLE);
EXPECT_EQ(kTestString, p.readString8());
EXPECT_EQ(p.enforceNoDataAvail().exceptionCode(), Status::Exception::EX_NONE);
}
TEST(Parcel, DebugReadAllBinders) {
sp<IBinder> binder1 = sp<BBinder>::make();
sp<IBinder> binder2 = sp<BBinder>::make();
Parcel p;
p.writeInt32(4);
p.writeStrongBinder(binder1);
p.writeStrongBinder(nullptr);
p.writeInt32(4);
p.writeStrongBinder(binder2);
p.writeInt32(4);
auto ret = p.debugReadAllStrongBinders();
ASSERT_EQ(ret.size(), 2);
EXPECT_EQ(ret[0], binder1);
EXPECT_EQ(ret[1], binder2);
}
TEST(Parcel, DebugReadAllFds) {
Parcel p;
p.writeInt32(4);
p.writeFileDescriptor(STDOUT_FILENO, false /*takeOwnership*/);
p.writeInt32(4);
p.writeFileDescriptor(STDIN_FILENO, false /*takeOwnership*/);
p.writeInt32(4);
auto ret = p.debugReadAllFileDescriptors();
ASSERT_EQ(ret.size(), 2);
EXPECT_EQ(ret[0], STDOUT_FILENO);
EXPECT_EQ(ret[1], STDIN_FILENO);
}
// Tests a second operation results in a parcel at the same location as it
// started.
void parcelOpSameLength(const std::function<void(Parcel*)>& a, const std::function<void(Parcel*)>& b) {
Parcel p;
a(&p);
size_t end = p.dataPosition();
p.setDataPosition(0);
b(&p);
EXPECT_EQ(end, p.dataPosition());
}
TEST(Parcel, InverseInterfaceToken) {
const String16 token = String16("asdf");
parcelOpSameLength([&] (Parcel* p) {
p->writeInterfaceToken(token);
}, [&] (Parcel* p) {
EXPECT_TRUE(p->enforceInterface(token, IPCThreadState::self()));
});
}
TEST(Parcel, Utf8FromUtf16Read) {
const char* token = "asdf";
parcelOpSameLength([&] (Parcel* p) {
p->writeString16(String16(token));
}, [&] (Parcel* p) {
std::string s;
EXPECT_EQ(OK, p->readUtf8FromUtf16(&s));
EXPECT_EQ(token, s);
});
}
TEST(Parcel, Utf8AsUtf16Write) {
std::string token = "asdf";
parcelOpSameLength([&] (Parcel* p) {
p->writeUtf8AsUtf16(token);
}, [&] (Parcel* p) {
String16 s;
EXPECT_EQ(OK, p->readString16(&s));
EXPECT_EQ(s, String16(token.c_str()));
});
}
template <typename T>
using readFunc = status_t (Parcel::*)(T* out) const;
template <typename T>
using writeFunc = status_t (Parcel::*)(const T& in);
template <typename T>
using copyWriteFunc = status_t (Parcel::*)(T in);
template <typename T, typename WRITE_FUNC>
void readWriteInverse(std::vector<T>&& ts, readFunc<T> r, WRITE_FUNC w) {
for (const T& value : ts) {
parcelOpSameLength([&] (Parcel* p) {
(*p.*w)(value);
}, [&] (Parcel* p) {
T outValue;
EXPECT_EQ(OK, (*p.*r)(&outValue));
EXPECT_EQ(value, outValue);
});
}
}
template <typename T>
void readWriteInverse(std::vector<T>&& ts, readFunc<T> r, writeFunc<T> w) {
readWriteInverse<T, writeFunc<T>>(std::move(ts), r, w);
}
template <typename T>
void readWriteInverse(std::vector<T>&& ts, readFunc<T> r, copyWriteFunc<T> w) {
readWriteInverse<T, copyWriteFunc<T>>(std::move(ts), r, w);
}
#define TEST_READ_WRITE_INVERSE(type, name, ...) \
TEST(Parcel, Inverse##name) { \
readWriteInverse<type>(__VA_ARGS__, &Parcel::read##name, &Parcel::write##name); \
}
TEST_READ_WRITE_INVERSE(int32_t, Int32, {-2, -1, 0, 1, 2});
TEST_READ_WRITE_INVERSE(uint32_t, Uint32, {0, 1, 2});
TEST_READ_WRITE_INVERSE(int64_t, Int64, {-2, -1, 0, 1, 2});
TEST_READ_WRITE_INVERSE(uint64_t, Uint64, {0, 1, 2});
TEST_READ_WRITE_INVERSE(float, Float, {-1.0f, 0.0f, 3.14f});
TEST_READ_WRITE_INVERSE(double, Double, {-1.0, 0.0, 3.14});
TEST_READ_WRITE_INVERSE(bool, Bool, {true, false});
TEST_READ_WRITE_INVERSE(char16_t, Char, {u'a', u'\0'});
TEST_READ_WRITE_INVERSE(int8_t, Byte, {-1, 0, 1});
TEST_READ_WRITE_INVERSE(String8, String8, {String8(), String8("a"), String8("asdf")});
TEST_READ_WRITE_INVERSE(String16, String16, {String16(), String16("a"), String16("asdf")});
TEST(Parcel, GetOpenAshmemSize) {
constexpr size_t kSize = 1024;
constexpr size_t kCount = 3;
Parcel p;
for (size_t i = 0; i < kCount; i++) {
int fd = ashmem_create_region("test-getOpenAshmemSize", kSize);
ASSERT_GE(fd, 0);
ASSERT_EQ(OK, p.writeFileDescriptor(fd, true /* take ownership */));
ASSERT_EQ((kSize * (i + 1)), p.getOpenAshmemSize());
}
}
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