src/os_cpu/linux_ppc/vm/os_linux_ppc.cpp

rev 8111 : 8078482: ppc: pass thread to throw_AbstractMethodError
Summary: Also improve check for Safepoints in signal handler.
Reviewed-by: kvn, simonis

*** 1,8 ****
  /*
!  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
!  * Copyright 2012, 2014 SAP AG. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,8 ----
  /*
!  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
!  * Copyright 2012, 2015 SAP AG. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 296,305 ****
--- 296,306 ----
            tty->print_raw_cr("SIGILL happened inside zero page.");
          }
          goto report_and_die;
        }
  
+       CodeBlob *cb = NULL;
        // Handle signal from NativeJump::patch_verified_entry().
        if (( TrapBasedNotEntrantChecks && sig == SIGTRAP && nativeInstruction_at(pc)->is_sigtrap_zombie_not_entrant()) ||
            (!TrapBasedNotEntrantChecks && sig == SIGILL  && nativeInstruction_at(pc)->is_sigill_zombie_not_entrant())) {
          if (TraceTraps) {
            tty->print_cr("trap: zombie_not_entrant (%s)", (sig == SIGTRAP) ? "SIGTRAP" : "SIGILL");
*** 311,321 ****
                 // A linux-ppc64 kernel before 2.6.6 doesn't set si_addr on some segfaults
                 // in 64bit mode (cf. http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.6),
                 // especially when we try to read from the safepoint polling page. So the check
                 //   (address)info->si_addr == os::get_standard_polling_page()
                 // doesn't work for us. We use:
!                ((NativeInstruction*)pc)->is_safepoint_poll()) {
          if (TraceTraps) {
            tty->print_cr("trap: safepoint_poll at " INTPTR_FORMAT " (SIGSEGV)", p2i(pc));
          }
          stub = SharedRuntime::get_poll_stub(pc);
        }
--- 312,325 ----
                 // A linux-ppc64 kernel before 2.6.6 doesn't set si_addr on some segfaults
                 // in 64bit mode (cf. http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.6),
                 // especially when we try to read from the safepoint polling page. So the check
                 //   (address)info->si_addr == os::get_standard_polling_page()
                 // doesn't work for us. We use:
!                ((NativeInstruction*)pc)->is_safepoint_poll() &&
!                CodeCache::contains((void*) pc) &&
!                ((cb = CodeCache::find_blob(pc)) != NULL) &&
!                cb->is_nmethod()) {
          if (TraceTraps) {
            tty->print_cr("trap: safepoint_poll at " INTPTR_FORMAT " (SIGSEGV)", p2i(pc));
          }
          stub = SharedRuntime::get_poll_stub(pc);
        }