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//===-- buffer_queue_test.cc ----------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is a part of XRay, a function call tracing system.
//
//===----------------------------------------------------------------------===//
#include "xray_buffer_queue.h"
#include "gtest/gtest.h"
#include <future>
#include <system_error>
#include <unistd.h>
namespace __xray {
static constexpr size_t kSize = 4096;
TEST(BufferQueueTest, API) { BufferQueue Buffers(kSize, 1); }
TEST(BufferQueueTest, GetAndRelease) {
BufferQueue Buffers(kSize, 1);
BufferQueue::Buffer Buf;
ASSERT_EQ(Buffers.getBuffer(Buf), std::error_code());
ASSERT_NE(nullptr, Buf.Buffer);
ASSERT_EQ(Buffers.releaseBuffer(Buf), std::error_code());
ASSERT_EQ(nullptr, Buf.Buffer);
}
TEST(BufferQueueTest, GetUntilFailed) {
BufferQueue Buffers(kSize, 1);
BufferQueue::Buffer Buf0;
EXPECT_EQ(Buffers.getBuffer(Buf0), std::error_code());
BufferQueue::Buffer Buf1;
EXPECT_EQ(std::errc::not_enough_memory, Buffers.getBuffer(Buf1));
EXPECT_EQ(Buffers.releaseBuffer(Buf0), std::error_code());
}
TEST(BufferQueueTest, ReleaseUnknown) {
BufferQueue Buffers(kSize, 1);
BufferQueue::Buffer Buf;
Buf.Buffer = reinterpret_cast<void *>(0xdeadbeef);
Buf.Size = kSize;
EXPECT_EQ(std::errc::argument_out_of_domain, Buffers.releaseBuffer(Buf));
}
TEST(BufferQueueTest, ErrorsWhenFinalising) {
BufferQueue Buffers(kSize, 2);
BufferQueue::Buffer Buf;
ASSERT_EQ(Buffers.getBuffer(Buf), std::error_code());
ASSERT_NE(nullptr, Buf.Buffer);
ASSERT_EQ(Buffers.finalize(), std::error_code());
BufferQueue::Buffer OtherBuf;
ASSERT_EQ(std::errc::state_not_recoverable, Buffers.getBuffer(OtherBuf));
ASSERT_EQ(std::errc::state_not_recoverable, Buffers.finalize());
ASSERT_EQ(Buffers.releaseBuffer(Buf), std::error_code());
}
TEST(BufferQueueTest, MultiThreaded) {
BufferQueue Buffers(kSize, 100);
auto F = [&] {
BufferQueue::Buffer B;
while (!Buffers.getBuffer(B)) {
Buffers.releaseBuffer(B);
}
};
auto T0 = std::async(std::launch::async, F);
auto T1 = std::async(std::launch::async, F);
auto T2 = std::async(std::launch::async, [&] {
while (!Buffers.finalize())
;
});
F();
}
} // namespace __xray
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