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//===- llvm/unittest/Support/MemoryBufferTest.cpp - MemoryBuffer tests ----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements unit tests for the MemoryBuffer support class.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/OwningPtr.h"
#include "gtest/gtest.h"
using namespace llvm;
class MemoryBufferTest : public testing::Test {
protected:
MemoryBufferTest()
: data("this is some data")
{ }
virtual void SetUp() { }
typedef OwningPtr<MemoryBuffer> OwningBuffer;
std::string data;
};
namespace {
TEST_F(MemoryBufferTest, get) {
// Default name and null-terminator flag
OwningBuffer MB1(MemoryBuffer::getMemBuffer(data));
EXPECT_TRUE(0 != MB1.get());
// RequiresNullTerminator = false
OwningBuffer MB2(MemoryBuffer::getMemBuffer(data, "one", false));
EXPECT_TRUE(0 != MB2.get());
// RequiresNullTerminator = true
OwningBuffer MB3(MemoryBuffer::getMemBuffer(data, "two", true));
EXPECT_TRUE(0 != MB3.get());
// verify all 3 buffers point to the same address
EXPECT_EQ(MB1->getBufferStart(), MB2->getBufferStart());
EXPECT_EQ(MB2->getBufferStart(), MB3->getBufferStart());
// verify the original data is unmodified after deleting the buffers
MB1.reset();
MB2.reset();
MB3.reset();
EXPECT_EQ("this is some data", data);
}
TEST_F(MemoryBufferTest, copy) {
// copy with no name
OwningBuffer MBC1(MemoryBuffer::getMemBufferCopy(data));
EXPECT_TRUE(0 != MBC1.get());
// copy with a name
OwningBuffer MBC2(MemoryBuffer::getMemBufferCopy(data, "copy"));
EXPECT_TRUE(0 != MBC2.get());
// verify the two copies do not point to the same place
EXPECT_NE(MBC1->getBufferStart(), MBC2->getBufferStart());
}
TEST_F(MemoryBufferTest, make_new) {
// 0-sized buffer
OwningBuffer Zero(MemoryBuffer::getNewUninitMemBuffer(0));
EXPECT_TRUE(0 != Zero.get());
// uninitialized buffer with no name
OwningBuffer One(MemoryBuffer::getNewUninitMemBuffer(321));
EXPECT_TRUE(0 != One.get());
// uninitialized buffer with name
OwningBuffer Two(MemoryBuffer::getNewUninitMemBuffer(123, "bla"));
EXPECT_TRUE(0 != Two.get());
// 0-initialized buffer with no name
OwningBuffer Three(MemoryBuffer::getNewMemBuffer(321, data));
EXPECT_TRUE(0 != Three.get());
for (size_t i = 0; i < 321; ++i)
EXPECT_EQ(0, Three->getBufferStart()[0]);
// 0-initialized buffer with name
OwningBuffer Four(MemoryBuffer::getNewMemBuffer(123, "zeros"));
EXPECT_TRUE(0 != Four.get());
for (size_t i = 0; i < 123; ++i)
EXPECT_EQ(0, Four->getBufferStart()[0]);
}
TEST_F(MemoryBufferTest, getOpenFileNoNullTerminator) {
// Test that MemoryBuffer::getOpenFile works properly when no null
// terminator is requested and the size is large enough to trigger
// the usage of memory mapping.
int TestFD;
SmallString<64> TestPath;
// Create a temporary file and write data into it.
sys::fs::createTemporaryFile("prefix", "temp", TestFD, TestPath);
// OF is responsible for closing the file, and is unbuffered so that
// the results are immediately visible through the fd.
raw_fd_ostream OF(TestFD, true, true);
for (int i = 0; i < 60000; ++i) {
OF << "0123456789";
}
OwningBuffer Buf;
error_code EC = MemoryBuffer::getOpenFile(TestFD,
TestPath.c_str(),
Buf,
40000, // Size
-1,
8000, // Offset
false);
EXPECT_FALSE(EC);
StringRef BufData = Buf->getBuffer();
EXPECT_EQ(BufData.size(), 40000U);
EXPECT_EQ(BufData[0], '0');
EXPECT_EQ(BufData[9], '9');
}
}
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