1 /* 2 * Copyright (c) 2008, 2016, Oracle and/or its affiliates. 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_LINUX_ARM_VM_THREAD_LINUX_ARM_HPP 26 #define OS_CPU_LINUX_ARM_VM_THREAD_LINUX_ARM_HPP 27 28 private: 29 // The following thread-local variables replicate corresponding global variables. 30 // They are used for a quick access from compiled code via Rthread register. 31 address _heap_top_addr; 32 address _heap_lock_addr; 33 address _card_table_base; 34 35 void pd_initialize() { 36 _anchor.clear(); 37 } 38 39 frame pd_last_frame() { 40 assert(has_last_Java_frame(), "must have last_Java_sp() when suspended"); 41 #ifdef AARCH64 42 assert (_anchor.last_Java_pc() != NULL, "pc should be stored"); 43 return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp(), _anchor.last_Java_pc()); 44 #else 45 if (_anchor.last_Java_pc() != NULL) { 46 return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp(), _anchor.last_Java_pc()); 47 } else { 48 // This will pick up pc from sp 49 return frame(_anchor.last_Java_sp(), _anchor.last_Java_fp()); 50 } 51 #endif // AARCH64 52 } 53 54 public: 55 intptr_t* last_Java_fp() { return _anchor.last_Java_fp(); } 56 void set_last_Java_fp(intptr_t* fp) { _anchor.set_last_Java_fp(fp); } 57 void set_last_Java_pc(address pc) { _anchor.set_last_Java_pc(pc); } 58 59 static ByteSize last_Java_fp_offset() { 60 return byte_offset_of(JavaThread, _anchor) + JavaFrameAnchor::last_Java_fp_offset(); 61 } 62 63 void set_base_of_stack_pointer(intptr_t* base_sp) { 64 // Nothing to do 65 } 66 67 intptr_t* base_of_stack_pointer() { 68 return NULL; 69 } 70 71 void record_base_of_stack_pointer() { 72 // Nothing to do 73 } 74 75 static ByteSize heap_top_addr_offset() { return byte_offset_of(JavaThread, _heap_top_addr); } 76 static ByteSize card_table_base_offset() { return byte_offset_of(JavaThread, _card_table_base); } 77 78 bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava); 79 80 bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava); 81 private: 82 bool pd_get_top_frame(frame* fr_addr, void* ucontext, bool isInJava); 83 public: 84 85 // These routines are only used on cpu architectures that 86 // have separate register stacks (Itanium). 87 static bool register_stack_overflow() { return false; } 88 static void enable_register_stack_guard() {} 89 static void disable_register_stack_guard() {} 90 91 #endif // OS_CPU_LINUX_ARM_VM_THREAD_LINUX_ARM_HPP