upload android base code part3

android/bionic/tests/sys_uio_test.cpp

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2015 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 <gtest/gtest.h>
+
+#include <sys/uio.h>
+
+#include "TemporaryFile.h"
+
+TEST(sys_uio, readv_writev) {
+  TemporaryFile tf;
+
+  char buf1[] = "hello";
+  char buf2[] = "world";
+  iovec ios[] = { { buf1, 5 }, { buf2, 5 } };
+
+  ASSERT_EQ(10, writev(tf.fd, ios, 2));
+
+  ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_SET));
+
+  memset(buf1, '1', sizeof(buf1));
+  memset(buf2, '2', sizeof(buf2));
+
+  ASSERT_EQ(10, readv(tf.fd, ios, 2));
+  buf1[5] = buf2[5] = '\0';
+  ASSERT_STREQ("hello", buf1);
+  ASSERT_STREQ("world", buf2);
+}
+
+template <typename ReadFn, typename WriteFn>
+void TestPreadVPwriteV(ReadFn read_fn, WriteFn write_fn) {
+  TemporaryFile tf;
+
+  char buf[] = "world";
+  iovec ios[] = { { buf, 5 } };
+
+  ASSERT_EQ(5, write_fn(tf.fd, ios, 1, 5));
+  ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_CUR));
+
+  strcpy(buf, "hello");
+  ASSERT_EQ(5, write_fn(tf.fd, ios, 1, 0));
+  ASSERT_EQ(0, lseek(tf.fd, 0, SEEK_CUR));
+
+  ASSERT_EQ(5, read_fn(tf.fd, ios, 1, 5));
+  ASSERT_STREQ("world", buf);
+  ASSERT_EQ(5, read_fn(tf.fd, ios, 1, 0));
+  ASSERT_STREQ("hello", buf);
+}
+
+TEST(sys_uio, preadv_pwritev) {
+  TestPreadVPwriteV(preadv, pwritev);
+}
+
+TEST(sys_uio, preadv64_pwritev64) {
+  TestPreadVPwriteV(preadv64, pwritev64);
+}
+
+TEST(sys_uio, process_vm_readv) {
+  ASSERT_EQ(0, process_vm_readv(0, nullptr, 0, nullptr, 0, 0));
+
+  // Test that we can read memory from our own process
+  char src[1024] = "This is the source buffer containing some data";
+  char dst[1024] = "";
+  iovec remote = { src, sizeof src };
+  iovec local = { dst, sizeof dst };
+  ASSERT_EQ(ssize_t(sizeof src), process_vm_readv(getpid(), &local, 1, &remote, 1, 0));
+  // Check whether data was copied (in the correct direction)
+  ASSERT_EQ('T', dst[0]);
+  ASSERT_EQ(0, memcmp(src, dst, sizeof src));
+
+  // Reading from non-allocated memory should return an error
+  remote = { nullptr, sizeof dst };
+  ASSERT_EQ(-1, process_vm_readv(getpid(), &local, 1, &remote, 1, 0));
+  ASSERT_EQ(EFAULT, errno);
+}
+
+TEST(sys_uio, process_vm_writev) {
+  ASSERT_EQ(0, process_vm_writev(0, nullptr, 0, nullptr, 0, 0));
+
+  // Test that we can read memory from our own process
+  char src[1024] = "This is the source buffer containing some data";
+  char dst[1024] = "";
+  iovec remote = { dst, sizeof dst };
+  iovec local = { src, sizeof src };
+  ASSERT_EQ(ssize_t(sizeof src), process_vm_writev(getpid(), &local, 1, &remote, 1, 0));
+  // Check whether data was copied (in the correct direction)
+  ASSERT_EQ('T', dst[0]);
+  ASSERT_EQ(0, memcmp(src, dst, sizeof src));
+
+  // Writing to non-allocated memory should return an error
+  remote = { nullptr, sizeof dst };
+  ASSERT_EQ(-1, process_vm_writev(getpid(), &local, 1, &remote, 1, 0));
+  ASSERT_EQ(EFAULT, errno);
+}