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/*
*
* Copyright 2017 gRPC authors.
*
* 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 <gtest/gtest.h>
#include <grpc/impl/codegen/byte_buffer.h>
#include <grpc/slice.h>
#include <grpcpp/impl/codegen/grpc_library.h>
#include <grpcpp/impl/codegen/proto_utils.h>
#include <grpcpp/impl/grpc_library.h>
#include "test/core/util/test_config.h"
namespace grpc {
namespace internal {
// Provide access to ProtoBufferWriter internals.
class ProtoBufferWriterPeer {
public:
explicit ProtoBufferWriterPeer(ProtoBufferWriter* writer) : writer_(writer) {}
bool have_backup() const { return writer_->have_backup_; }
const grpc_slice& backup_slice() const { return writer_->backup_slice_; }
const grpc_slice& slice() const { return writer_->slice_; }
private:
ProtoBufferWriter* writer_;
};
// Provide access to ByteBuffer internals.
class GrpcByteBufferPeer {
public:
explicit GrpcByteBufferPeer(ByteBuffer* bb) : bb_(bb) {}
grpc_byte_buffer* c_buffer() { return bb_->c_buffer(); }
private:
ByteBuffer* bb_;
};
class ProtoUtilsTest : public ::testing::Test {
protected:
static void SetUpTestCase() {
// Ensure the ProtoBufferWriter internals are initialized.
grpc::internal::GrpcLibraryInitializer init;
init.summon();
grpc::GrpcLibraryCodegen lib;
grpc_init();
}
static void TearDownTestCase() { grpc_shutdown(); }
};
// Regression test for a memory corruption bug where a series of
// ProtoBufferWriter Next()/Backup() invocations could result in a dangling
// pointer returned by Next() due to the interaction between grpc_slice inlining
// and GRPC_SLICE_START_PTR.
TEST_F(ProtoUtilsTest, TinyBackupThenNext) {
ByteBuffer bp;
const int block_size = 1024;
ProtoBufferWriter writer(&bp, block_size, 8192);
ProtoBufferWriterPeer peer(&writer);
void* data;
int size;
// Allocate a slice.
ASSERT_TRUE(writer.Next(&data, &size));
EXPECT_EQ(block_size, size);
// Return a single byte.
writer.BackUp(1);
EXPECT_FALSE(peer.have_backup());
// On the next allocation, the returned slice is non-inlined.
ASSERT_TRUE(writer.Next(&data, &size));
EXPECT_TRUE(peer.slice().refcount != nullptr);
EXPECT_EQ(block_size, size);
}
namespace {
// Set backup_size to 0 to indicate no backup is needed.
void BufferWriterTest(int block_size, int total_size, int backup_size) {
ByteBuffer bb;
ProtoBufferWriter writer(&bb, block_size, total_size);
int written_size = 0;
void* data;
int size = 0;
bool backed_up_entire_slice = false;
while (written_size < total_size) {
EXPECT_TRUE(writer.Next(&data, &size));
EXPECT_GT(size, 0);
EXPECT_TRUE(data);
int write_size = size;
bool should_backup = false;
if (backup_size > 0 && size > backup_size) {
write_size = size - backup_size;
should_backup = true;
} else if (size == backup_size && !backed_up_entire_slice) {
// only backup entire slice once.
backed_up_entire_slice = true;
should_backup = true;
write_size = 0;
}
// May need a last backup.
if (write_size + written_size > total_size) {
write_size = total_size - written_size;
should_backup = true;
backup_size = size - write_size;
ASSERT_GT(backup_size, 0);
}
for (int i = 0; i < write_size; i++) {
(static_cast<uint8_t*>(data))[i] = written_size % 128;
written_size++;
}
if (should_backup) {
writer.BackUp(backup_size);
}
}
EXPECT_EQ(bb.Length(), (size_t)total_size);
grpc_byte_buffer_reader reader;
GrpcByteBufferPeer peer(&bb);
grpc_byte_buffer_reader_init(&reader, peer.c_buffer());
int read_bytes = 0;
while (read_bytes < total_size) {
grpc_slice s;
EXPECT_TRUE(grpc_byte_buffer_reader_next(&reader, &s));
for (size_t i = 0; i < GRPC_SLICE_LENGTH(s); i++) {
EXPECT_EQ(GRPC_SLICE_START_PTR(s)[i], read_bytes % 128);
read_bytes++;
}
grpc_slice_unref(s);
}
EXPECT_EQ(read_bytes, total_size);
grpc_byte_buffer_reader_destroy(&reader);
}
class WriterTest : public ::testing::Test {
protected:
static void SetUpTestCase() {
grpc::internal::GrpcLibraryInitializer init;
init.summon();
grpc::GrpcLibraryCodegen lib;
// Ensure the ProtoBufferWriter internals are initialized.
grpc_init();
}
static void TearDownTestCase() { grpc_shutdown(); }
};
TEST_F(WriterTest, TinyBlockTinyBackup) {
for (int i = 2; i < static_cast<int> GRPC_SLICE_INLINED_SIZE; i++) {
BufferWriterTest(i, 256, 1);
}
}
TEST_F(WriterTest, SmallBlockTinyBackup) { BufferWriterTest(64, 256, 1); }
TEST_F(WriterTest, SmallBlockNoBackup) { BufferWriterTest(64, 256, 0); }
TEST_F(WriterTest, SmallBlockFullBackup) { BufferWriterTest(64, 256, 64); }
TEST_F(WriterTest, LargeBlockTinyBackup) { BufferWriterTest(4096, 8192, 1); }
TEST_F(WriterTest, LargeBlockNoBackup) { BufferWriterTest(4096, 8192, 0); }
TEST_F(WriterTest, LargeBlockFullBackup) { BufferWriterTest(4096, 8192, 4096); }
TEST_F(WriterTest, LargeBlockLargeBackup) {
BufferWriterTest(4096, 8192, 4095);
}
} // namespace
} // namespace internal
} // namespace grpc
int main(int argc, char** argv) {
grpc::testing::TestEnvironment env(&argc, argv);
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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