Mercurial > hg > truffle
diff src/os_cpu/linux_sparc/vm/thread_linux_sparc.hpp @ 133:435e64505015
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 |
line wrap: on
line diff
--- /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() {}