273 

   274 static void Test_logstream_helper(outputStream* stream) {

   275   TestLogFile log_file("log_stream");

   276   TestLogSavedConfig tlsc(log_file.name(), "gc=debug");

   277 

   278   // Try to log, but expect this to be filtered out.

   279   stream->print("%d ", 3); stream->print("workers"); stream->cr();

   280 

   281   FILE* fp = fopen(log_file.name(), "r");

   282   assert(fp != NULL, "File read error");

   283 

   284   char output[256 /* Large enough buffer */];

   285   char* res = fgets(output, sizeof(output), fp);

   286   assert(res != NULL, "assert");

   287 

   288   assert(strstr(output, "3 workers") != NULL, "log line missing");

   289 

   290   fclose(fp);

   291 }

   292 

   293 static void Test_logstream_log() {

   294   Log(gc) log;

   295   LogStream stream(log.debug());

   296 

   297   Test_logstream_helper(&stream);

   298 }

   299 

   300 static void Test_logstream_logtarget() {

   301   LogTarget(Debug, gc) log;

   302   LogStream stream(log);

   303 

   304   Test_logstream_helper(&stream);

   305 }

   306 

   307 static void Test_logstream_logstreamhandle() {

   308   LogStreamHandle(Debug, gc) stream;

   309 

   310   Test_logstream_helper(&stream);

   311 }

   312 

   313 static void Test_logstream_no_rm() {

   314   ResourceMark rm;

   315   outputStream* stream = LogTarget(Debug, gc)::stream();

   316 

   317   Test_logstream_helper(stream);

   318 }

   319 

   320 static void Test_logstreamcheap_log() {

   321   Log(gc) log;

   322   LogStreamCHeap stream(log.debug());

   323 

   324   Test_logstream_helper(&stream);

   325 }

   326 

   327 static void Test_logstreamcheap_logtarget() {

   328   LogTarget(Debug, gc) log;

   329   LogStreamCHeap stream(log);

   330 

   331   Test_logstream_helper(&stream);

   332 }

   333 

   334 void Test_logstream() {

   335   // Test LogStreams with embedded ResourceMark.

   336   Test_logstream_log();

   337   Test_logstream_logtarget();

   338   Test_logstream_logstreamhandle();

   339 

   340   // Test LogStreams without embedded ResourceMark.

   341   Test_logstream_no_rm();

   342 

   343   // Test LogStreams backed by CHeap memory.

   344   Test_logstreamcheap_log();

   345   Test_logstreamcheap_logtarget();

   346 }

   347