| /* |
| * Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2012, 2019 SAP SE. 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. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "runtime/frame.inline.hpp" |
| #include "runtime/thread.hpp" |
| |
| frame JavaThread::pd_last_frame() { |
| assert(has_last_Java_frame(), "must have last_Java_sp() when suspended"); |
| |
| intptr_t* sp = last_Java_sp(); |
| address pc = _anchor.last_Java_pc(); |
| |
| // Last_Java_pc ist not set, if we come here from compiled code. |
| if (pc == NULL) { |
| pc = (address) *(sp + 2); |
| } |
| |
| return frame(sp, pc); |
| } |
| |
| bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) { |
| assert(this->is_Java_thread(), "must be JavaThread"); |
| |
| // If we have a last_Java_frame, then we should use it even if |
| // isInJava == true. It should be more reliable than ucontext info. |
| if (has_last_Java_frame() && frame_anchor()->walkable()) { |
| *fr_addr = pd_last_frame(); |
| return true; |
| } |
| |
| // At this point, we don't have a last_Java_frame, so |
| // we try to glean some information out of the ucontext |
| // if we were running Java code when SIGPROF came in. |
| if (isInJava) { |
| ucontext_t* uc = (ucontext_t*) ucontext; |
| frame ret_frame((intptr_t*)uc->uc_mcontext.regs->gpr[1/*REG_SP*/], |
| (address)uc->uc_mcontext.regs->nip); |
| |
| if (ret_frame.pc() == NULL) { |
| // ucontext wasn't useful |
| return false; |
| } |
| |
| if (ret_frame.is_interpreted_frame()) { |
| frame::ijava_state *istate = ret_frame.get_ijava_state(); |
| const Method *m = (const Method*)(istate->method); |
| if (!Method::is_valid_method(m)) return false; |
| if (!Metaspace::contains((const void*)m->constMethod())) return false; |
| |
| uint64_t reg_bcp = uc->uc_mcontext.regs->gpr[14/*R14_bcp*/]; |
| uint64_t istate_bcp = istate->bcp; |
| uint64_t code_start = (uint64_t)(m->code_base()); |
| uint64_t code_end = (uint64_t)(m->code_base() + m->code_size()); |
| if (istate_bcp >= code_start && istate_bcp < code_end) { |
| // we have a valid bcp, don't touch it, do nothing |
| } else if (reg_bcp >= code_start && reg_bcp < code_end) { |
| istate->bcp = reg_bcp; |
| } else { |
| return false; |
| } |
| } |
| if (!ret_frame.safe_for_sender(this)) { |
| // nothing else to try if the frame isn't good |
| return false; |
| } |
| *fr_addr = ret_frame; |
| return true; |
| } |
| // nothing else to try |
| return false; |
| } |
| |
| // Forte Analyzer AsyncGetCallTrace profiling support. |
| bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava) { |
| return pd_get_top_frame_for_profiling(fr_addr, ucontext, isInJava); |
| } |
| |
| void JavaThread::cache_global_variables() { } |