1/*
2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24#include "precompiled.hpp"
25#include "logTestFixture.hpp"
26#include "logTestUtils.inline.hpp"
27#include "logging/log.hpp"
28#include "logging/logStream.hpp"
29#include "unittest.hpp"
30
31class LogStreamTest : public LogTestFixture {
32 protected:
33  void verify_stream(outputStream* stream);
34};
35
36void LogStreamTest::verify_stream(outputStream* stream) {
37  set_log_config(TestLogFileName, "gc=debug");
38  stream->print("%d ", 3);
39  stream->print("workers");
40  stream->cr();
41  EXPECT_TRUE(file_contains_substring(TestLogFileName, "3 workers\n"));
42}
43
44TEST_VM_F(LogStreamTest, from_log) {
45  Log(gc) log;
46  LogStream stream(log.debug());
47
48  verify_stream(&stream);
49}
50
51TEST_VM_F(LogStreamTest, from_logtarget) {
52  LogTarget(Debug, gc) log;
53  LogStream stream(log);
54
55  verify_stream(&stream);
56}
57
58TEST_VM_F(LogStreamTest, handle) {
59  LogStreamHandle(Debug, gc) stream;
60
61  verify_stream(&stream);
62}
63
64TEST_VM_F(LogStreamTest, no_rm) {
65  ResourceMark rm;
66  LogStream ls(Log(gc)::debug());
67  verify_stream(&ls);
68}
69
70TEST_VM_F(LogStreamTest, TestLineBufferAllocation) {
71  const int max_line_len = 1024;
72  char* const test_string = (char*) os::malloc(max_line_len, mtLogging);
73  memset(test_string, 'A', max_line_len);
74  for (int interval = 1; interval < max_line_len; interval++) {
75    LogStream ls(Log(logging)::info());
76    int written = 0;
77    while (written < max_line_len) {
78      const int to_write = MIN2(interval, max_line_len - written);
79      ls.write(test_string, interval);
80      written += interval;
81      const char* const line_buffer = ls._current_line.buffer();
82      for (int i = 0; i < written; i++) {
83        ASSERT_TRUE(line_buffer[i] == 'A');
84      }
85      ASSERT_TRUE(line_buffer[written] == '\0');
86    }
87    ls.cr(); // I do not expect printout, nor do I care. Just call cr() to flush and avoid assert in ~LogStream().
88  }
89}
90
91// Test, in release build, that the internal line buffer of a LogStream
92// object caps out at 1M.
93TEST_VM_F(LogStreamTest, TestLineBufferAllocationCap) {
94  LogStream ls(Log(logging)::info());
95  for (size_t i = 0; i < (1*M + 512); i ++) {
96    ls.print_raw("A");
97  }
98  const char* const line_buffer = ls._current_line.buffer();
99  ASSERT_TRUE(strlen(line_buffer) == 1*M - 1);
100  // reset to prevent assert for unflushed content
101  ls._current_line.reset();
102}
103