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/*
*
* Copyright 2017, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <grpc++/impl/codegen/proto_utils.h>
#include <grpc++/impl/grpc_library.h>
#include <gtest/gtest.h>
namespace grpc {
namespace internal {
static GrpcLibraryInitializer g_gli_initializer;
// 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, BackupNext) {
// Ensure the GrpcBufferWriter internals are initialized.
g_gli_initializer.summon();
grpc_byte_buffer* bp;
GrpcBufferWriter writer(&bp, 8192);
GrpcBufferWriterPeer peer(&writer);
void* data;
int size;
// Allocate a slice.
ASSERT_TRUE(writer.Next(&data, &size));
EXPECT_EQ(8192, size);
// Return a single byte. Before the fix that this test acts as a regression
// for, this would have resulted in an inlined backup slice.
writer.BackUp(1);
EXPECT_TRUE(!peer.have_backup());
// On the next allocation, the slice is non-inlined.
ASSERT_TRUE(writer.Next(&data, &size));
EXPECT_TRUE(peer.slice().refcount != NULL);
// Cleanup.
g_core_codegen_interface->grpc_byte_buffer_destroy(bp);
}
} // namespace internal
} // namespace grpc
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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