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src/hotspot/os_cpu/aix_ppc/os_aix_ppc.cpp

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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:

@@ -45,10 +45,11 @@
 #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"

@@ -372,13 +373,16 @@
         }
         stub = SharedRuntime::get_handle_wrong_method_stub();
         goto run_stub;
       }
 
-      else if (sig == SIGSEGV && os::is_poll_address(addr)) {
+      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 " (SIGSEGV)", pc);
+          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;
       }
 
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