Fix wait interval calculation in ProfLazyMode test.

test/cctest/test-log.cc

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 //
 // Tests of logging functions from log.h
 
 #ifdef ENABLE_LOGGING_AND_PROFILING
 
 #include "v8.h"
 
 #include "log.h"
 #include "cctest.h"
@@ skipping 148 matching lines @@
   buffer[map_log_size] = '\0';
   const char* code_creation = "\ncode-creation,";  // eq. to /^code-creation,/
   CHECK_NE(NULL, strstr(buffer.start(), code_creation));
 
   // Force compiler to generate new code by parametrizing source.
   EmbeddedVector<char, 100> script_src;
   i::OS::SNPrintF(script_src,
                   "for (var i = 0; i < 1000; ++i) { "
                   "(function(x) { return %d * x; })(i); }",
                   log_pos);
-  // Run code for 200 msecs to get some ticks. Use uint to always have
-  // non-negative delta.
-  const uint64_t started_us = i::OS::Ticks();
-  uint64_t delta;
-  while ((delta = i::OS::Ticks() - started_us) < 200 * 1000) {
+  // Run code for 200 msecs to get some ticks.
+  const double end_time = i::OS::TimeCurrentMillis() + 200;
+  while (i::OS::TimeCurrentMillis() < end_time) {
     CompileAndRunScript(script_src.start());
   }
 
   Logger::PauseProfiler();
   CHECK(!LoggerTestHelper::IsSamplerActive());
 
+  // Wait 50 msecs to allow Profiler thread to process the last
+  // tick sample it has got.
+  i::OS::Sleep(50);
+
   // Now we must have compiler and tick records.
   int log_size = GetLogLines(log_pos, &buffer);
   printf("log_size: %d\n", log_size);
   CHECK_GT(log_size, 0);
   CHECK_GT(buffer.length(), log_size);
   log_pos += log_size;
   // Check buffer contents.
   buffer[log_size] = '\0';
   const char* tick = "\ntick,";
   CHECK_NE(NULL, strstr(buffer.start(), code_creation));
@@ skipping 511 matching lines @@
   // Make sure that all log data is written prior crash due to CHECK failure.
   fflush(stdout);
   CHECK(results_equal);
 
   env->Exit();
   Logger::TearDown();
   i::FLAG_always_compact = saved_always_compact;
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING