diff src/os_cpu/linux_sparc/vm/thread_linux_sparc.hpp @ 122:435e64505015

6693457: Open-source hotspot linux-sparc support Summary: Move os_cpu/linux_sparc from closed to open Reviewed-by: kamg
author phh
date Thu, 24 Apr 2008 15:07:57 -0400
parents
children d1605aabd0a1
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/os_cpu/linux_sparc/vm/thread_linux_sparc.hpp	Thu Apr 24 15:07:57 2008 -0400
@@ -0,0 +1,98 @@
+/*
+ * Copyright 1998-2007 Sun Microsystems, Inc.  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.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+private:
+
+  void pd_initialize() {
+    _anchor.clear();
+    _base_of_stack_pointer        = NULL;
+  }
+
+  frame pd_last_frame() {
+    assert(has_last_Java_frame(), "must have last_Java_sp() when suspended");
+    assert(_anchor.walkable(), "thread has not dumped its register windows yet");
+
+    assert(_anchor.last_Java_pc() != NULL, "Ack no pc!");
+    return frame(last_Java_sp(), frame::unpatchable, _anchor.last_Java_pc());
+  }
+
+  // Sometimes the trap handler needs to record both PC and NPC.
+  // This is a SPARC-specific companion to Thread::set_saved_exception_pc.
+  address _saved_exception_npc;
+
+  // In polling_page_safepoint_handler_blob(s) we have to tail call other
+  // blobs without blowing any registers.  A tail call requires some
+  // register to jump with and we can't blow any registers, so it must
+  // be restored in the delay slot.  'restore' cannot be used as it
+  // will chop the heads off of 64-bit %o registers in the 32-bit
+  // build.  Instead we reload the registers using G2_thread and this
+  // location.  Must be 64bits in the 32-bit LION build.
+  jdouble _o_reg_temps[6];
+
+  // a stack pointer older than any java frame stack pointer.  It is
+  // used to validate stack pointers in frame::next_younger_sp (it
+  // provides the upper bound in the range check).  This is necessary
+  // on Solaris/SPARC since the ucontext passed to a signal handler is
+  // sometimes corrupt and we need a way to check the extracted sp.
+  intptr_t* _base_of_stack_pointer;
+
+public:
+
+  static int o_reg_temps_offset_in_bytes() { return offset_of(JavaThread, _o_reg_temps); }
+
+#ifndef _LP64
+  address o_reg_temps(int i) { return (address)&_o_reg_temps[i]; }
+#endif
+
+  static int saved_exception_npc_offset_in_bytes() { return offset_of(JavaThread,_saved_exception_npc); }
+
+  address  saved_exception_npc()             { return _saved_exception_npc; }
+  void set_saved_exception_npc(address a)    { _saved_exception_npc = a; }
+
+
+public:
+
+  intptr_t* base_of_stack_pointer() { return _base_of_stack_pointer; }
+
+  void set_base_of_stack_pointer(intptr_t* base_sp) {
+    _base_of_stack_pointer = base_sp;
+  }
+
+  void record_base_of_stack_pointer() {
+    intptr_t *sp = (intptr_t *)(((intptr_t)StubRoutines::Sparc::flush_callers_register_windows_func()()));
+    intptr_t *ysp;
+    while((ysp = (intptr_t*)sp[FP->sp_offset_in_saved_window()]) != NULL) {
+      sp = (intptr_t *)((intptr_t)ysp + STACK_BIAS);
+    }
+    _base_of_stack_pointer = sp;
+  }
+
+  bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext,
+    bool isInJava);
+
+  // These routines are only used on cpu architectures that
+  // have separate register stacks (Itanium).
+  static bool register_stack_overflow() { return false; }
+  static void enable_register_stack_guard() {}
+  static void disable_register_stack_guard() {}