I was confused when I found that simply passing -XX:+UseLargePages to the gtestlauncher breaks every death test.

The reason is that UseLargePages causes a warning, unconditionally, on stderr if we have not enough huge pages to satisfy the VM initialization. That is harmless, however, these warnings appear to break gtest assert message regognition.

That is a pity since it would be really useful to execute part of the gtests with +UseLargePages to test large page coding better (and a number of those tests could be useful even without huge pages available).

=========
$ cd build/linux-x64-debug
$ JAVA_TOOL_OPTIONS=-XX:+UseLargePages make test-only TEST=gtest:SafepointLockAssertTest
Building target 'test-only' in configuration 'linux-x64-debug'
Test selection 'gtest:SafepointLockAssertTest', will run:
* gtest:SafepointLockAssertTest/server

Running test 'gtest:SafepointLockAssertTest/server'
Note: Google Test filter = SafepointLockAssertTest*
[==========] Running 4 tests from 1 test case.
[----------] Global test environment set-up.
[----------] 4 tests from SafepointLockAssertTest
[ RUN ] SafepointLockAssertTest.always_check_vm_assert
/jdk2/rum/open/test/hotspot/gtest/runtime/test_safepoint_locks.cpp:33: Failure
Death test: child_SafepointLockAssertTest_always_check_()
    Result: died but not with expected error.
  Expected: ^assert failed: This lock should always have a safepoint check for Java threads
Actual msg:
[ DEATH ] Picked up JAVA_TOOL_OPTIONS: -XX:+UseLargePages
[ DEATH ] Java HotSpot(TM) 64-Bit Server VM warning: Failed to reserve shared memory. (error = 1)
[ DEATH ] Java HotSpot(TM) 64-Bit Server VM warning: Failed to reserve shared memory. (error = 1)
[ DEATH ] Java HotSpot(TM) 64-Bit Server VM warning: Failed to reserve shared memory. (error = 1)
[ DEATH ] Java HotSpot(TM) 64-Bit Server VM warning: Failed to reserve shared memory. (error = 1)
[ DEATH ] Java HotSpot(TM) 64-Bit Server VM warning: Failed to reserve shared memory. (error = 1)
[ DEATH ] Java HotSpot(TM) 64-Bit Server VM warning: Failed to reserve shared memory. (error = 1)
[ DEATH ] assert failed: This lock should always have a safepoint check for Java threads: SFPT_Test_lock
[ DEATH ]
[ FAILED ] SafepointLockAssertTest.always_check_vm_assert (210 ms)