src/hotspot/os_cpu/aix_ppc/os_aix_ppc.cpp

rev 48405 : 8194258: PPC64 safepoint mechanism: Fix initialization on AIX and support SIGTRAP
Summary: Use mmap on AIX to allocate protected page. Use trap instructions for polling if UseSIGTRAP is enabled.
Reviewed-by:

*** 45,54 ****
--- 45,55 ----
  #include "runtime/interfaceSupport.hpp"
  #include "runtime/java.hpp"
  #include "runtime/javaCalls.hpp"
  #include "runtime/mutexLocker.hpp"
  #include "runtime/osThread.hpp"
+ #include "runtime/safepointMechanism.hpp"
  #include "runtime/sharedRuntime.hpp"
  #include "runtime/stubRoutines.hpp"
  #include "runtime/thread.inline.hpp"
  #include "runtime/timer.hpp"
  #include "utilities/events.hpp"
*** 372,384 ****
          }
          stub = SharedRuntime::get_handle_wrong_method_stub();
          goto run_stub;
        }
  
!       else if (sig == SIGSEGV && os::is_poll_address(addr)) {
          if (TraceTraps) {
!           tty->print_cr("trap: safepoint_poll at " INTPTR_FORMAT " (SIGSEGV)", pc);
          }
          stub = SharedRuntime::get_poll_stub(pc);
          goto run_stub;
        }
  
--- 373,388 ----
          }
          stub = SharedRuntime::get_handle_wrong_method_stub();
          goto run_stub;
        }
  
!       else if ((SafepointMechanism::uses_thread_local_poll() && USE_POLL_BIT_ONLY)
!                ? (sig == SIGTRAP && ((NativeInstruction*)pc)->is_safepoint_poll())
!                : (sig == SIGSEGV && os::is_poll_address(addr))) {
          if (TraceTraps) {
!           tty->print_cr("trap: safepoint_poll at " INTPTR_FORMAT " (%s)", p2i(pc),
!                         (SafepointMechanism::uses_thread_local_poll() && USE_POLL_BIT_ONLY) ? "SIGTRAP" : "SIGSEGV");
          }
          stub = SharedRuntime::get_poll_stub(pc);
          goto run_stub;
        }