1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2016 SAP SE. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef OS_CPU_LINUX_S390_VM_THREAD_LINUX_S390_HPP 27 #define OS_CPU_LINUX_S390_VM_THREAD_LINUX_S390_HPP 28 29 private: 30 31 void pd_initialize() { 32 _anchor.clear(); 33 _last_interpreter_fp = NULL; 34 } 35 36 // The `last' frame is the youngest Java frame on the thread's stack. 37 frame pd_last_frame() { 38 assert(has_last_Java_frame(), "must have last_Java_sp() when suspended"); 39 40 intptr_t* sp = last_Java_sp(); 41 address pc = _anchor.last_Java_pc(); 42 43 // Last_Java_pc ist not set if we come here from compiled code. 44 if (pc == NULL) { 45 pc = (address) *(sp + 14); 46 } 47 48 return frame(sp, pc); 49 } 50 51 public: 52 void set_base_of_stack_pointer(intptr_t* base_sp) {} 53 intptr_t* base_of_stack_pointer() { return NULL; } 54 void record_base_of_stack_pointer() {} 55 56 // These routines are only used on cpu architectures that 57 // have separate register stacks (Itanium). 58 static bool register_stack_overflow() { return false; } 59 static void enable_register_stack_guard() {} 60 static void disable_register_stack_guard() {} 61 62 bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava); 63 64 protected: 65 66 // -Xprof support 67 // 68 // In order to find the last Java fp from an async profile 69 // tick, we store the current interpreter fp in the thread. 70 // This value is only valid while we are in the C++ interpreter 71 // and profiling. 72 intptr_t *_last_interpreter_fp; 73 74 public: 75 76 static ByteSize last_interpreter_fp_offset() { 77 return byte_offset_of(JavaThread, _last_interpreter_fp); 78 } 79 80 intptr_t* last_interpreter_fp() { return _last_interpreter_fp; } 81 82 #endif // OS_CPU_LINUX_S390_VM_THREAD_LINUX_S390_HPP