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/*
* Copyright (C) 2019 The Android Open Source Project
*
* 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 "utils/FileMap.h"
#include <gtest/gtest.h>
#include "android-base/file.h"
TEST(FileMap, zero_length_mapping) {
// http://b/119818070 "app crashes when reading asset of zero length".
// mmap fails with EINVAL for a zero length region.
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
android::FileMap m;
ASSERT_TRUE(m.create("test", tf.fd, 4096, 0, true));
ASSERT_STREQ("test", m.getFileName());
ASSERT_EQ(0u, m.getDataLength());
ASSERT_EQ(4096, m.getDataOffset());
}
TEST(FileMap, large_offset) {
// Make sure that an offset > INT32_MAX will not fail the create
// function. See http://b/155662887.
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
off64_t offset = INT32_MAX + 1024LL;
// Make the temporary file large enough to pass the mmap.
ASSERT_EQ(offset, lseek64(tf.fd, offset, SEEK_SET));
char value = 0;
ASSERT_EQ(1, write(tf.fd, &value, 1));
android::FileMap m;
ASSERT_TRUE(m.create("test", tf.fd, offset, 0, true));
ASSERT_STREQ("test", m.getFileName());
ASSERT_EQ(0u, m.getDataLength());
ASSERT_EQ(offset, m.getDataOffset());
}
TEST(FileMap, offset_overflow) {
// Make sure that an end that overflows SIZE_MAX will not abort.
// See http://b/156997193.
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
off64_t offset = 200;
size_t length = SIZE_MAX;
android::FileMap m;
ASSERT_FALSE(m.create("test", tf.fd, offset, length, true));
}
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