1 /* 2 * Copyright (c) 2020, Microsoft Corporation. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef OS_CPU_WINDOWS_AARCH64_THREAD_WINDOWS_AARCH64_HPP 26 #define OS_CPU_WINDOWS_AARCH64_THREAD_WINDOWS_AARCH64_HPP 27 28 private: 29 30 #ifdef ASSERT 31 // spill stack holds N callee-save registers at each Java call and 32 // grows downwards towards limit 33 // we need limit to check we have space for a spill and base so we 34 // can identify all live spill frames at GC (eventually) 35 address _spill_stack; 36 address _spill_stack_base; 37 address _spill_stack_limit; 38 #endif // ASSERT 39 40 void pd_initialize() { 41 _anchor.clear(); 42 } 43 44 frame pd_last_frame(); 45 46 public: 47 // Mutators are highly dangerous.... 48 intptr_t* last_Java_fp() { return _anchor.last_Java_fp(); } 49 void set_last_Java_fp(intptr_t* fp) { _anchor.set_last_Java_fp(fp); } 50 51 void set_base_of_stack_pointer(intptr_t* base_sp) { 52 } 53 54 static ByteSize last_Java_fp_offset() { 55 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_fp_offset(); 56 } 57 58 intptr_t* base_of_stack_pointer() { 59 return NULL; 60 } 61 void record_base_of_stack_pointer() { 62 } 63 64 bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, 65 bool isInJava); 66 67 bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava); 68 private: 69 bool pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava); 70 public: 71 72 static Thread *aarch64_get_thread_helper() { 73 return Thread::current(); 74 } 75 76 // These routines are only used on cpu architectures that 77 // have separate register stacks (Itanium). 78 static bool register_stack_overflow() { return false; } 79 static void enable_register_stack_guard() {} 80 static void disable_register_stack_guard() {} 81 82 #endif // OS_CPU_WINDOWS_AARCH64_THREAD_WINDOWS_AARCH64_HPP