missing JVMPI_EVENT_MONITOR_CONTENDED_EXIT events

Name: elR10090 Date: 03/13/2001


The JDK 1.4.0-beta-b55 and 1.3.1-rc1-b18 for all platforms except Win32
fail the following test from testbase_nsk:

    nsk/jvmpi/events/mncntexit001

The test traces JVMPI event JVMPI_EVENT_MONITOR_CONTENDED_EXIT when
it is enabled by a profiler agent.

The test java-program runs a number of threads syncronized
to the main thread by objects. The test profiler agent enables and traces
JVMPI_EVENT_MONITOR_CONTENDED_ENTERED and JVMPI_EVENT_MONITOR_CONTENDED_EXIT
events and checks if appropriate events are sent and provide correct
information. The test also checks if the number of MONITOR_CONTENDED_EXIT
is not less than the number of MONITOR_CONTENDED_ENTERED events.

The test reveals that the profiler agent misses some of the
JVMPI_EVENT_MONITOR_CONTENDED_EXIT events on all platforms but the Windows.

This does not happen on Windows platform.

To reproduce the bug run in GammaBase/Bugs/<this bug number> directory

    sh doit.sh <JDK root directory> <options>

Running the test outputs:

java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b55)
Java HotSpot(TM) Client VM (build 1.4beta-B55, mixed mode)
Error: JVMPI_EVENT_MONITOR_CONTENDED_EXIT count = 0
  < JVMPI_EVENT_MONITOR_CONTENDED_ENTERED count = 103

======================================================================