Mercurial > hg > graal-compiler
view src/os_cpu/linux_sparc/vm/thread_linux_sparc.hpp @ 12138:35471dcba316
Merge
author | iklam |
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date | Tue, 27 Aug 2013 03:35:46 -0400 |
parents | f95d63e2154a |
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/* * Copyright (c) 1998, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP #define OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP 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() {} #endif // OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP