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/*
* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2019 SAP SE. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "memory/resourceArea.hpp"
#include "runtime/os.hpp"
#include "utilities/globalDefinitions.hpp"
#include "utilities/ostream.hpp"
#include "unittest.hpp"
static size_t print_lorem(outputStream* st) {
// Create a ResourceMark just to make sure the stream does not use ResourceArea
ResourceMark rm;
static const char* const lorem = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, "
"sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Lacinia at quis "
"risus sed vulputate odio ut enim blandit. Amet risus nullam eget felis eget. Viverra "
"orci sagittis eu volutpat odio facilisis mauris sit. Erat velit scelerisque in dictum non.";
static const size_t len_lorem = strlen(lorem);
// Randomly alternate between short and long writes at a ratio of 9:1.
const bool short_write = (os::random() % 10) > 0;
const size_t len = os::random() % (short_write ? 10 : len_lorem);
st->write(lorem, len);
return len;
}
static void test_stringStream_is_zero_terminated(const stringStream* ss) {
ASSERT_EQ(ss->base()[ss->size()], '\0');
}
static void do_test_stringStream(stringStream* ss, size_t expected_cap) {
test_stringStream_is_zero_terminated(ss);
size_t written = 0;
for (int i = 0; i < 1000; i ++) {
written += print_lorem(ss);
if (expected_cap > 0 && written >= expected_cap) {
ASSERT_EQ(ss->size(), expected_cap - 1);
} else {
ASSERT_EQ(ss->size(), written);
}
// Internal buffer should always be zero-terminated.
test_stringStream_is_zero_terminated(ss);
}
// Reset should zero terminate too
ss->reset();
ASSERT_EQ(ss->size(), (size_t)0);
test_stringStream_is_zero_terminated(ss);
}
TEST_VM(ostream, stringStream_dynamic_start_with_internal_buffer) {
stringStream ss;
do_test_stringStream(&ss, 0);
ss.reset();
do_test_stringStream(&ss, 0);
}
TEST_VM(ostream, stringStream_dynamic_start_with_malloced_buffer) {
stringStream ss(128);
do_test_stringStream(&ss, 0);
ss.reset();
do_test_stringStream(&ss, 0);
}
TEST_VM(ostream, stringStream_static) {
char buffer[128 + 1];
char* canary_at = buffer + sizeof(buffer) - 1;
*canary_at = 'X';
size_t stream_buf_size = sizeof(buffer) - 1;
stringStream ss(buffer, stream_buf_size);
do_test_stringStream(&ss, stream_buf_size);
ASSERT_EQ(*canary_at, 'X'); // canary
}
TEST_VM(ostream, bufferedStream_static) {
char buf[100 + 1];
char* canary_at = buf + sizeof(buf) - 1;
*canary_at = 'X';
size_t stream_buf_size = sizeof(buf) - 1;
bufferedStream bs(buf, stream_buf_size);
size_t written = 0;
for (int i = 0; i < 100; i ++) {
written += print_lorem(&bs);
if (written < stream_buf_size) {
ASSERT_EQ(bs.size(), written);
} else {
ASSERT_EQ(bs.size(), stream_buf_size - 1);
}
}
ASSERT_EQ(*canary_at, 'X'); // canary
}
TEST_VM(ostream, bufferedStream_dynamic_small) {
bufferedStream bs(1); // small to excercise realloc.
size_t written = 0;
// The max cap imposed is 100M, we should be safely below this in this test.
for (int i = 0; i < 10; i ++) {
written += print_lorem(&bs);
ASSERT_EQ(bs.size(), written);
}
}
/* Activate to manually test bufferedStream dynamic cap.
TEST_VM(ostream, bufferedStream_dynamic_large) {
bufferedStream bs(1); // small to excercise realloc.
size_t written = 0;
// The max cap imposed is 100M. Writing this much should safely hit it.
// Note that this will assert in debug builds which is the expected behavior.
size_t expected_cap_at = 100 * M;
for (int i = 0; i < 10000000; i ++) {
written += print_lorem(&bs);
if (written < expected_cap_at) {
ASSERT_EQ(bs.size(), written);
} else {
ASSERT_EQ(bs.size(), expected_cap_at - 1);
}
}
}
*/
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