test/native/logging/test_logStream.cpp

rev 13113 : imported patch 8181917-refactor-ul-logstream
rev 13114 : imported patch 8181917-refactor-ul-logstream-changes-2
rev 13115 : [mq]: 8181917-refactor-ul-logstream-changes-3

@@ -64,5 +64,27 @@
 TEST_VM_F(LogStreamTest, no_rm) {
   ResourceMark rm;
   LogStream ls(Log(gc)::debug());
   verify_stream(&ls);
 }
+
+TEST_VM_F(LogStreamTest, TestLineBufferAllocation) {
+  const int max_line_len = 1024;
+  char* const test_string = (char*) os::malloc(max_line_len, mtLogging);
+  memset(test_string, 'A', max_line_len);
+  for (int interval = 1; interval < max_line_len; interval++) {
+    LogStream ls(Log(logging)::info());
+    int written = 0;
+    while (written < max_line_len) {
+      const int to_write = MIN2(interval, max_line_len - written);
+      ls.write(test_string, interval);
+      written += interval;
+      const char* const line_buffer = ls._current_line.ptr();
+      for (int i = 0; i < written; i++) {
+        ASSERT_TRUE(line_buffer[i] == 'A');
+      }
+      ASSERT_TRUE(line_buffer[written] == '\0');
+    }
+    ls.cr(); // I do not expect printout, nor do I care. Just call cr() to flush and avoid assert in ~LogStream().
+  }
+}
+