| /* |
| * |
| * 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 <grpc++/impl/codegen/grpc_library.h> |
| #include <grpc++/impl/codegen/proto_utils.h> |
| #include <grpc++/impl/grpc_library.h> |
| #include <grpc/impl/codegen/byte_buffer.h> |
| #include <grpc/slice.h> |
| #include <gtest/gtest.h> |
| |
| namespace grpc { |
| namespace internal { |
| |
| // Provide access to GrpcBufferWriter internals. |
| class GrpcBufferWriterPeer { |
| public: |
| explicit GrpcBufferWriterPeer(internal::GrpcBufferWriter* 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: |
| GrpcBufferWriter* writer_; |
| }; |
| |
| class ProtoUtilsTest : public ::testing::Test {}; |
| |
| // Regression test for a memory corruption bug where a series of |
| // GrpcBufferWriter 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) { |
| grpc_byte_buffer* bp; |
| const int block_size = 1024; |
| GrpcBufferWriter writer(&bp, block_size, 8192); |
| GrpcBufferWriterPeer 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); |
| |
| // Cleanup. |
| g_core_codegen_interface->grpc_byte_buffer_destroy(bp); |
| } |
| |
| namespace { |
| |
| // Set backup_size to 0 to indicate no backup is needed. |
| void BufferWriterTest(int block_size, int total_size, int backup_size) { |
| grpc_byte_buffer* bp; |
| GrpcBufferWriter writer(&bp, 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++) { |
| ((uint8_t*)data)[i] = written_size % 128; |
| written_size++; |
| } |
| if (should_backup) { |
| writer.BackUp(backup_size); |
| } |
| } |
| EXPECT_EQ(grpc_byte_buffer_length(bp), (size_t)total_size); |
| |
| grpc_byte_buffer_reader reader; |
| grpc_byte_buffer_reader_init(&reader, bp); |
| 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); |
| grpc_byte_buffer_destroy(bp); |
| } |
| |
| TEST(WriterTest, TinyBlockTinyBackup) { |
| for (int i = 2; i < (int)GRPC_SLICE_INLINED_SIZE; i++) { |
| BufferWriterTest(i, 256, 1); |
| } |
| } |
| |
| TEST(WriterTest, SmallBlockTinyBackup) { BufferWriterTest(64, 256, 1); } |
| |
| TEST(WriterTest, SmallBlockNoBackup) { BufferWriterTest(64, 256, 0); } |
| |
| TEST(WriterTest, SmallBlockFullBackup) { BufferWriterTest(64, 256, 64); } |
| |
| TEST(WriterTest, LargeBlockTinyBackup) { BufferWriterTest(4096, 8192, 1); } |
| |
| TEST(WriterTest, LargeBlockNoBackup) { BufferWriterTest(4096, 8192, 0); } |
| |
| TEST(WriterTest, LargeBlockFullBackup) { BufferWriterTest(4096, 8192, 4096); } |
| |
| TEST(WriterTest, LargeBlockLargeBackup) { BufferWriterTest(4096, 8192, 4095); } |
| |
| } // namespace |
| } // namespace internal |
| } // namespace grpc |
| |
| int main(int argc, char** argv) { |
| // Ensure the GrpcBufferWriter internals are initialized. |
| grpc::internal::GrpcLibraryInitializer init; |
| init.summon(); |
| grpc::GrpcLibraryCodegen lib; |
| |
| ::testing::InitGoogleTest(&argc, argv); |
| return RUN_ALL_TESTS(); |
| } |