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108 lines
3.2 KiB
108 lines
3.2 KiB
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <gtest/gtest.h>
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#include <sys/uio.h>
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#include <android-base/file.h>
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TEST(sys_uio, readv_writev) {
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TemporaryFile tf;
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char buf1[] = "hello";
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char buf2[] = "world";
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iovec ios[] = { { buf1, 5 }, { buf2, 5 } };
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ASSERT_EQ(10, writev(tf.fd, ios, 2));
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ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET));
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memset(buf1, '1', sizeof(buf1));
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memset(buf2, '2', sizeof(buf2));
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ASSERT_EQ(10, readv(tf.fd, ios, 2));
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buf1[5] = buf2[5] = '\0';
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ASSERT_STREQ("hello", buf1);
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ASSERT_STREQ("world", buf2);
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}
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template <typename ReadFn, typename WriteFn>
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void TestPreadVPwriteV(ReadFn read_fn, WriteFn write_fn) {
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TemporaryFile tf;
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char buf[] = "world";
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iovec ios[] = { { buf, 5 } };
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ASSERT_EQ(5, write_fn(tf.fd, ios, 1, 5));
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ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_CUR));
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strcpy(buf, "hello");
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ASSERT_EQ(5, write_fn(tf.fd, ios, 1, 0));
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ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_CUR));
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ASSERT_EQ(5, read_fn(tf.fd, ios, 1, 5));
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ASSERT_STREQ("world", buf);
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ASSERT_EQ(5, read_fn(tf.fd, ios, 1, 0));
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ASSERT_STREQ("hello", buf);
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}
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TEST(sys_uio, preadv_pwritev) {
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TestPreadVPwriteV(preadv, pwritev);
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}
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TEST(sys_uio, preadv64_pwritev64) {
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TestPreadVPwriteV(preadv64, pwritev64);
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}
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TEST(sys_uio, process_vm_readv) {
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ASSERT_EQ(0, process_vm_readv(0, nullptr, 0, nullptr, 0, 0));
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// Test that we can read memory from our own process
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char src[1024] = "This is the source buffer containing some data";
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char dst[1024] = "";
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iovec remote = { src, sizeof src };
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iovec local = { dst, sizeof dst };
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ASSERT_EQ(ssize_t(sizeof src), process_vm_readv(getpid(), &local, 1, &remote, 1, 0));
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// Check whether data was copied (in the correct direction)
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ASSERT_EQ('T', dst[0]);
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ASSERT_EQ(0, memcmp(src, dst, sizeof src));
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// Reading from non-allocated memory should return an error
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remote = { nullptr, sizeof dst };
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ASSERT_EQ(-1, process_vm_readv(getpid(), &local, 1, &remote, 1, 0));
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ASSERT_EQ(EFAULT, errno);
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}
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TEST(sys_uio, process_vm_writev) {
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ASSERT_EQ(0, process_vm_writev(0, nullptr, 0, nullptr, 0, 0));
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// Test that we can read memory from our own process
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char src[1024] = "This is the source buffer containing some data";
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char dst[1024] = "";
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iovec remote = { dst, sizeof dst };
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iovec local = { src, sizeof src };
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ASSERT_EQ(ssize_t(sizeof src), process_vm_writev(getpid(), &local, 1, &remote, 1, 0));
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// Check whether data was copied (in the correct direction)
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ASSERT_EQ('T', dst[0]);
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ASSERT_EQ(0, memcmp(src, dst, sizeof src));
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// Writing to non-allocated memory should return an error
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remote = { nullptr, sizeof dst };
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ASSERT_EQ(-1, process_vm_writev(getpid(), &local, 1, &remote, 1, 0));
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ASSERT_EQ(EFAULT, errno);
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}
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