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99 lines
3.7 KiB
C++
99 lines
3.7 KiB
C++
/*
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* Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP
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#define OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP
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private:
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void pd_initialize() {
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_anchor.clear();
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_base_of_stack_pointer = NULL;
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}
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frame pd_last_frame();
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// Sometimes the trap handler needs to record both PC and NPC.
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// This is a SPARC-specific companion to Thread::set_saved_exception_pc.
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address _saved_exception_npc;
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// In polling_page_safepoint_handler_blob(s) we have to tail call other
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// blobs without blowing any registers. A tail call requires some
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// register to jump with and we can't blow any registers, so it must
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// be restored in the delay slot. 'restore' cannot be used as it
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// will chop the heads off of 64-bit %o registers in the 32-bit
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// build. Instead we reload the registers using G2_thread and this
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// location. Must be 64bits in the 32-bit LION build.
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jdouble _o_reg_temps[6];
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// a stack pointer older than any java frame stack pointer. It is
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// used to validate stack pointers in frame::next_younger_sp (it
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// provides the upper bound in the range check). This is necessary
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// on Solaris/SPARC since the ucontext passed to a signal handler is
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// sometimes corrupt and we need a way to check the extracted sp.
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intptr_t* _base_of_stack_pointer;
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public:
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static int o_reg_temps_offset_in_bytes() { return offset_of(JavaThread, _o_reg_temps); }
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#ifndef _LP64
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address o_reg_temps(int i) { return (address)&_o_reg_temps[i]; }
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#endif
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static ByteSize saved_exception_npc_offset() { return byte_offset_of(JavaThread,_saved_exception_npc); }
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address saved_exception_npc() { return _saved_exception_npc; }
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void set_saved_exception_npc(address a) { _saved_exception_npc = a; }
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public:
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intptr_t* base_of_stack_pointer() { return _base_of_stack_pointer; }
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void set_base_of_stack_pointer(intptr_t* base_sp) {
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_base_of_stack_pointer = base_sp;
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}
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void record_base_of_stack_pointer() {
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intptr_t *sp = (intptr_t *)(((intptr_t)StubRoutines::Sparc::flush_callers_register_windows_func()()));
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intptr_t *ysp;
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while((ysp = (intptr_t*)sp[FP->sp_offset_in_saved_window()]) != NULL) {
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sp = (intptr_t *)((intptr_t)ysp + STACK_BIAS);
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}
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_base_of_stack_pointer = sp;
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}
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bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava);
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bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava);
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// These routines are only used on cpu architectures that
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// have separate register stacks (Itanium).
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static bool register_stack_overflow() { return false; }
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static void enable_register_stack_guard() {}
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static void disable_register_stack_guard() {}
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#endif // OS_CPU_LINUX_SPARC_VM_THREAD_LINUX_SPARC_HPP
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