author | chegar |
Thu, 17 Oct 2019 20:54:25 +0100 | |
branch | datagramsocketimpl-branch |
changeset 58679 | 9c3209ff7550 |
parent 58678 | 9cf78a70fa4f |
parent 57811 | 947252a54b98 |
permissions | -rw-r--r-- |
29183 | 1 |
/* |
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* Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved. |
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* Copyright (c) 2014, Red Hat Inc. 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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#include "precompiled.hpp" |
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#include "interpreter/interpreter.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "memory/universe.hpp" |
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#include "oops/markWord.hpp" |
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#include "oops/method.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "prims/methodHandles.hpp" |
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#include "runtime/frame.inline.hpp" |
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#include "runtime/handles.inline.hpp" |
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#include "runtime/javaCalls.hpp" |
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#include "runtime/monitorChunk.hpp" |
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#include "runtime/os.inline.hpp" |
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#include "runtime/signature.hpp" |
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#include "runtime/stubCodeGenerator.hpp" |
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#include "runtime/stubRoutines.hpp" |
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#include "vmreg_aarch64.inline.hpp" |
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#ifdef COMPILER1 |
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#include "c1/c1_Runtime1.hpp" |
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#include "runtime/vframeArray.hpp" |
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#endif |
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#ifdef ASSERT |
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void RegisterMap::check_location_valid() { |
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} |
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#endif |
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// Profiling/safepoint support |
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bool frame::safe_for_sender(JavaThread *thread) { |
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address sp = (address)_sp; |
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address fp = (address)_fp; |
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address unextended_sp = (address)_unextended_sp; |
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// consider stack guards when trying to determine "safe" stack pointers |
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static size_t stack_guard_size = os::uses_stack_guard_pages() ? |
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(JavaThread::stack_red_zone_size() + JavaThread::stack_yellow_zone_size()) : 0; |
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size_t usable_stack_size = thread->stack_size() - stack_guard_size; |
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// sp must be within the usable part of the stack (not in guards) |
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bool sp_safe = (sp < thread->stack_base()) && |
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(sp >= thread->stack_base() - usable_stack_size); |
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if (!sp_safe) { |
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return false; |
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} |
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// When we are running interpreted code the machine stack pointer, SP, is |
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// set low enough so that the Java expression stack can grow and shrink |
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// without ever exceeding the machine stack bounds. So, ESP >= SP. |
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// When we call out of an interpreted method, SP is incremented so that |
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// the space between SP and ESP is removed. The SP saved in the callee's |
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// frame is the SP *before* this increment. So, when we walk a stack of |
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// interpreter frames the sender's SP saved in a frame might be less than |
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// the SP at the point of call. |
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// So unextended sp must be within the stack but we need not to check |
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// that unextended sp >= sp |
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bool unextended_sp_safe = (unextended_sp < thread->stack_base()); |
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if (!unextended_sp_safe) { |
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return false; |
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} |
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// an fp must be within the stack and above (but not equal) sp |
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// second evaluation on fp+ is added to handle situation where fp is -1 |
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bool fp_safe = (fp < thread->stack_base() && (fp > sp) && (((fp + (return_addr_offset * sizeof(void*))) < thread->stack_base()))); |
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// We know sp/unextended_sp are safe only fp is questionable here |
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// If the current frame is known to the code cache then we can attempt to |
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// to construct the sender and do some validation of it. This goes a long way |
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// toward eliminating issues when we get in frame construction code |
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if (_cb != NULL ) { |
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// First check if frame is complete and tester is reliable |
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// Unfortunately we can only check frame complete for runtime stubs and nmethod |
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// other generic buffer blobs are more problematic so we just assume they are |
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// ok. adapter blobs never have a frame complete and are never ok. |
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if (!_cb->is_frame_complete_at(_pc)) { |
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if (_cb->is_nmethod() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) { |
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return false; |
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} |
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} |
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// Could just be some random pointer within the codeBlob |
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if (!_cb->code_contains(_pc)) { |
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return false; |
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} |
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// Entry frame checks |
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if (is_entry_frame()) { |
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// an entry frame must have a valid fp. |
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return fp_safe && is_entry_frame_valid(thread); |
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} |
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intptr_t* sender_sp = NULL; |
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intptr_t* sender_unextended_sp = NULL; |
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address sender_pc = NULL; |
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intptr_t* saved_fp = NULL; |
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if (is_interpreted_frame()) { |
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// fp must be safe |
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if (!fp_safe) { |
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return false; |
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} |
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sender_pc = (address) this->fp()[return_addr_offset]; |
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// for interpreted frames, the value below is the sender "raw" sp, |
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// which can be different from the sender unextended sp (the sp seen |
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// by the sender) because of current frame local variables |
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sender_sp = (intptr_t*) addr_at(sender_sp_offset); |
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sender_unextended_sp = (intptr_t*) this->fp()[interpreter_frame_sender_sp_offset]; |
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saved_fp = (intptr_t*) this->fp()[link_offset]; |
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} else { |
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// must be some sort of compiled/runtime frame |
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// fp does not have to be safe (although it could be check for c1?) |
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// check for a valid frame_size, otherwise we are unlikely to get a valid sender_pc |
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if (_cb->frame_size() <= 0) { |
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return false; |
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} |
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sender_sp = _unextended_sp + _cb->frame_size(); |
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// Is sender_sp safe? |
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if ((address)sender_sp >= thread->stack_base()) { |
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return false; |
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} |
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sender_unextended_sp = sender_sp; |
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sender_pc = (address) *(sender_sp-1); |
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// Note: frame::sender_sp_offset is only valid for compiled frame |
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saved_fp = (intptr_t*) *(sender_sp - frame::sender_sp_offset); |
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} |
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// If the potential sender is the interpreter then we can do some more checking |
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if (Interpreter::contains(sender_pc)) { |
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// fp is always saved in a recognizable place in any code we generate. However |
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// only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved fp |
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// is really a frame pointer. |
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bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp); |
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if (!saved_fp_safe) { |
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return false; |
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} |
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// construct the potential sender |
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frame sender(sender_sp, sender_unextended_sp, saved_fp, sender_pc); |
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return sender.is_interpreted_frame_valid(thread); |
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} |
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// We must always be able to find a recognizable pc |
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CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc); |
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if (sender_pc == NULL || sender_blob == NULL) { |
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return false; |
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} |
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// Could be a zombie method |
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if (sender_blob->is_zombie() || sender_blob->is_unloaded()) { |
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return false; |
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} |
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199 |
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// Could just be some random pointer within the codeBlob |
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if (!sender_blob->code_contains(sender_pc)) { |
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return false; |
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203 |
} |
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204 |
||
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// We should never be able to see an adapter if the current frame is something from code cache |
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if (sender_blob->is_adapter_blob()) { |
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return false; |
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208 |
} |
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209 |
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// Could be the call_stub |
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if (StubRoutines::returns_to_call_stub(sender_pc)) { |
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bool saved_fp_safe = ((address)saved_fp < thread->stack_base()) && (saved_fp > sender_sp); |
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213 |
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214 |
if (!saved_fp_safe) { |
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return false; |
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216 |
} |
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217 |
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// construct the potential sender |
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frame sender(sender_sp, sender_unextended_sp, saved_fp, sender_pc); |
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// Validate the JavaCallWrapper an entry frame must have |
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address jcw = (address)sender.entry_frame_call_wrapper(); |
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bool jcw_safe = (jcw < thread->stack_base()) && (jcw > (address)sender.fp()); |
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return jcw_safe; |
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} |
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CompiledMethod* nm = sender_blob->as_compiled_method_or_null(); |
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if (nm != NULL) { |
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if (nm->is_deopt_mh_entry(sender_pc) || nm->is_deopt_entry(sender_pc) || |
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nm->method()->is_method_handle_intrinsic()) { |
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return false; |
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} |
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} |
237 |
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238 |
// If the frame size is 0 something (or less) is bad because every nmethod has a non-zero frame size |
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239 |
// because the return address counts against the callee's frame. |
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240 |
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241 |
if (sender_blob->frame_size() <= 0) { |
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assert(!sender_blob->is_compiled(), "should count return address at least"); |
29183 | 243 |
return false; |
244 |
} |
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245 |
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246 |
// We should never be able to see anything here except an nmethod. If something in the |
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247 |
// code cache (current frame) is called by an entity within the code cache that entity |
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248 |
// should not be anything but the call stub (already covered), the interpreter (already covered) |
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249 |
// or an nmethod. |
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if (!sender_blob->is_compiled()) { |
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return false; |
253 |
} |
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254 |
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255 |
// Could put some more validation for the potential non-interpreted sender |
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256 |
// frame we'd create by calling sender if I could think of any. Wait for next crash in forte... |
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257 |
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258 |
// One idea is seeing if the sender_pc we have is one that we'd expect to call to current cb |
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259 |
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260 |
// We've validated the potential sender that would be created |
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261 |
return true; |
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262 |
} |
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263 |
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264 |
// Must be native-compiled frame. Since sender will try and use fp to find |
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265 |
// linkages it must be safe |
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266 |
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267 |
if (!fp_safe) { |
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268 |
return false; |
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269 |
} |
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270 |
||
271 |
// Will the pc we fetch be non-zero (which we'll find at the oldest frame) |
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272 |
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273 |
if ( (address) this->fp()[return_addr_offset] == NULL) return false; |
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274 |
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275 |
||
276 |
// could try and do some more potential verification of native frame if we could think of some... |
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277 |
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278 |
return true; |
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279 |
||
280 |
} |
|
281 |
||
282 |
void frame::patch_pc(Thread* thread, address pc) { |
|
283 |
address* pc_addr = &(((address*) sp())[-1]); |
|
284 |
if (TracePcPatching) { |
|
285 |
tty->print_cr("patch_pc at address " INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "]", |
|
286 |
p2i(pc_addr), p2i(*pc_addr), p2i(pc)); |
|
287 |
} |
|
288 |
// Either the return address is the original one or we are going to |
|
289 |
// patch in the same address that's already there. |
|
290 |
assert(_pc == *pc_addr || pc == *pc_addr, "must be"); |
|
291 |
*pc_addr = pc; |
|
292 |
_cb = CodeCache::find_blob(pc); |
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|
293 |
address original_pc = CompiledMethod::get_deopt_original_pc(this); |
29183 | 294 |
if (original_pc != NULL) { |
295 |
assert(original_pc == _pc, "expected original PC to be stored before patching"); |
|
296 |
_deopt_state = is_deoptimized; |
|
297 |
// leave _pc as is |
|
298 |
} else { |
|
299 |
_deopt_state = not_deoptimized; |
|
300 |
_pc = pc; |
|
301 |
} |
|
302 |
} |
|
303 |
||
304 |
bool frame::is_interpreted_frame() const { |
|
305 |
return Interpreter::contains(pc()); |
|
306 |
} |
|
307 |
||
308 |
int frame::frame_size(RegisterMap* map) const { |
|
309 |
frame sender = this->sender(map); |
|
310 |
return sender.sp() - sp(); |
|
311 |
} |
|
312 |
||
313 |
intptr_t* frame::entry_frame_argument_at(int offset) const { |
|
314 |
// convert offset to index to deal with tsi |
|
315 |
int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); |
|
316 |
// Entry frame's arguments are always in relation to unextended_sp() |
|
317 |
return &unextended_sp()[index]; |
|
318 |
} |
|
319 |
||
320 |
// sender_sp |
|
321 |
intptr_t* frame::interpreter_frame_sender_sp() const { |
|
322 |
assert(is_interpreted_frame(), "interpreted frame expected"); |
|
323 |
return (intptr_t*) at(interpreter_frame_sender_sp_offset); |
|
324 |
} |
|
325 |
||
326 |
void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) { |
|
327 |
assert(is_interpreted_frame(), "interpreted frame expected"); |
|
328 |
ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp); |
|
329 |
} |
|
330 |
||
331 |
||
332 |
// monitor elements |
|
333 |
||
334 |
BasicObjectLock* frame::interpreter_frame_monitor_begin() const { |
|
335 |
return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset); |
|
336 |
} |
|
337 |
||
338 |
BasicObjectLock* frame::interpreter_frame_monitor_end() const { |
|
339 |
BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset); |
|
340 |
// make sure the pointer points inside the frame |
|
341 |
assert(sp() <= (intptr_t*) result, "monitor end should be above the stack pointer"); |
|
342 |
assert((intptr_t*) result < fp(), "monitor end should be strictly below the frame pointer"); |
|
343 |
return result; |
|
344 |
} |
|
345 |
||
346 |
void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) { |
|
347 |
*((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value; |
|
348 |
} |
|
349 |
||
350 |
// Used by template based interpreter deoptimization |
|
351 |
void frame::interpreter_frame_set_last_sp(intptr_t* sp) { |
|
352 |
*((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp; |
|
353 |
} |
|
354 |
||
355 |
frame frame::sender_for_entry_frame(RegisterMap* map) const { |
|
356 |
assert(map != NULL, "map must be set"); |
|
357 |
// Java frame called from C; skip all C frames and return top C |
|
358 |
// frame of that chunk as the sender |
|
359 |
JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); |
|
360 |
assert(!entry_frame_is_first(), "next Java fp must be non zero"); |
|
361 |
assert(jfa->last_Java_sp() > sp(), "must be above this frame on stack"); |
|
40643 | 362 |
// Since we are walking the stack now this nested anchor is obviously walkable |
363 |
// even if it wasn't when it was stacked. |
|
364 |
if (!jfa->walkable()) { |
|
365 |
// Capture _last_Java_pc (if needed) and mark anchor walkable. |
|
366 |
jfa->capture_last_Java_pc(); |
|
367 |
} |
|
29183 | 368 |
map->clear(); |
369 |
assert(map->include_argument_oops(), "should be set by clear"); |
|
40643 | 370 |
vmassert(jfa->last_Java_pc() != NULL, "not walkable"); |
371 |
frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc()); |
|
29183 | 372 |
return fr; |
373 |
} |
|
374 |
||
375 |
//------------------------------------------------------------------------------ |
|
376 |
// frame::verify_deopt_original_pc |
|
377 |
// |
|
378 |
// Verifies the calculated original PC of a deoptimization PC for the |
|
30552
ff209a4a81b5
8079564: Use FP register as proper frame pointer in JIT compiled code on aarch64
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parents:
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diff
changeset
|
379 |
// given unextended SP. |
29183 | 380 |
#ifdef ASSERT |
38133
78b95467b9f1
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parents:
35232
diff
changeset
|
381 |
void frame::verify_deopt_original_pc(CompiledMethod* nm, intptr_t* unextended_sp) { |
29183 | 382 |
frame fr; |
383 |
||
384 |
// This is ugly but it's better than to change {get,set}_original_pc |
|
385 |
// to take an SP value as argument. And it's only a debugging |
|
386 |
// method anyway. |
|
387 |
fr._unextended_sp = unextended_sp; |
|
388 |
||
389 |
address original_pc = nm->get_original_pc(&fr); |
|
43474
8fbf946045f6
8172844: Assert fails in deoptimization due to original PC at the end of code section
zmajo
parents:
43439
diff
changeset
|
390 |
assert(nm->insts_contains_inclusive(original_pc), |
8fbf946045f6
8172844: Assert fails in deoptimization due to original PC at the end of code section
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parents:
43439
diff
changeset
|
391 |
"original PC must be in the main code section of the the compiled method (or must be immediately following it)"); |
29183 | 392 |
} |
393 |
#endif |
|
394 |
||
395 |
//------------------------------------------------------------------------------ |
|
396 |
// frame::adjust_unextended_sp |
|
397 |
void frame::adjust_unextended_sp() { |
|
30552
ff209a4a81b5
8079564: Use FP register as proper frame pointer in JIT compiled code on aarch64
enevill
parents:
29192
diff
changeset
|
398 |
// On aarch64, sites calling method handle intrinsics and lambda forms are treated |
ff209a4a81b5
8079564: Use FP register as proper frame pointer in JIT compiled code on aarch64
enevill
parents:
29192
diff
changeset
|
399 |
// as any other call site. Therefore, no special action is needed when we are |
ff209a4a81b5
8079564: Use FP register as proper frame pointer in JIT compiled code on aarch64
enevill
parents:
29192
diff
changeset
|
400 |
// returning to any of these call sites. |
29183 | 401 |
|
38133
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
35232
diff
changeset
|
402 |
if (_cb != NULL) { |
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
35232
diff
changeset
|
403 |
CompiledMethod* sender_cm = _cb->as_compiled_method_or_null(); |
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
35232
diff
changeset
|
404 |
if (sender_cm != NULL) { |
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
35232
diff
changeset
|
405 |
// If the sender PC is a deoptimization point, get the original PC. |
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
35232
diff
changeset
|
406 |
if (sender_cm->is_deopt_entry(_pc) || |
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
35232
diff
changeset
|
407 |
sender_cm->is_deopt_mh_entry(_pc)) { |
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
35232
diff
changeset
|
408 |
DEBUG_ONLY(verify_deopt_original_pc(sender_cm, _unextended_sp)); |
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
35232
diff
changeset
|
409 |
} |
29183 | 410 |
} |
411 |
} |
|
412 |
} |
|
413 |
||
414 |
//------------------------------------------------------------------------------ |
|
415 |
// frame::update_map_with_saved_link |
|
416 |
void frame::update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr) { |
|
417 |
// The interpreter and compiler(s) always save fp in a known |
|
418 |
// location on entry. We must record where that location is |
|
419 |
// so that if fp was live on callout from c2 we can find |
|
420 |
// the saved copy no matter what it called. |
|
421 |
||
422 |
// Since the interpreter always saves fp if we record where it is then |
|
423 |
// we don't have to always save fp on entry and exit to c2 compiled |
|
424 |
// code, on entry will be enough. |
|
425 |
map->set_location(rfp->as_VMReg(), (address) link_addr); |
|
426 |
// this is weird "H" ought to be at a higher address however the |
|
427 |
// oopMaps seems to have the "H" regs at the same address and the |
|
428 |
// vanilla register. |
|
429 |
// XXXX make this go away |
|
430 |
if (true) { |
|
431 |
map->set_location(rfp->as_VMReg()->next(), (address) link_addr); |
|
432 |
} |
|
433 |
} |
|
434 |
||
435 |
||
436 |
//------------------------------------------------------------------------------ |
|
437 |
// frame::sender_for_interpreter_frame |
|
438 |
frame frame::sender_for_interpreter_frame(RegisterMap* map) const { |
|
439 |
// SP is the raw SP from the sender after adapter or interpreter |
|
440 |
// extension. |
|
441 |
intptr_t* sender_sp = this->sender_sp(); |
|
442 |
||
443 |
// This is the sp before any possible extension (adapter/locals). |
|
444 |
intptr_t* unextended_sp = interpreter_frame_sender_sp(); |
|
445 |
||
47799 | 446 |
#if COMPILER2_OR_JVMCI |
29183 | 447 |
if (map->update_map()) { |
448 |
update_map_with_saved_link(map, (intptr_t**) addr_at(link_offset)); |
|
449 |
} |
|
47799 | 450 |
#endif // COMPILER2_OR_JVMCI |
29183 | 451 |
|
452 |
return frame(sender_sp, unextended_sp, link(), sender_pc()); |
|
453 |
} |
|
454 |
||
455 |
||
456 |
//------------------------------------------------------------------------------ |
|
457 |
// frame::sender_for_compiled_frame |
|
458 |
frame frame::sender_for_compiled_frame(RegisterMap* map) const { |
|
459 |
// we cannot rely upon the last fp having been saved to the thread |
|
460 |
// in C2 code but it will have been pushed onto the stack. so we |
|
461 |
// have to find it relative to the unextended sp |
|
462 |
||
463 |
assert(_cb->frame_size() >= 0, "must have non-zero frame size"); |
|
464 |
intptr_t* l_sender_sp = unextended_sp() + _cb->frame_size(); |
|
465 |
intptr_t* unextended_sp = l_sender_sp; |
|
466 |
||
467 |
// the return_address is always the word on the stack |
|
468 |
address sender_pc = (address) *(l_sender_sp-1); |
|
469 |
||
470 |
intptr_t** saved_fp_addr = (intptr_t**) (l_sender_sp - frame::sender_sp_offset); |
|
471 |
||
472 |
// assert (sender_sp() == l_sender_sp, "should be"); |
|
473 |
// assert (*saved_fp_addr == link(), "should be"); |
|
474 |
||
475 |
if (map->update_map()) { |
|
476 |
// Tell GC to use argument oopmaps for some runtime stubs that need it. |
|
477 |
// For C1, the runtime stub might not have oop maps, so set this flag |
|
478 |
// outside of update_register_map. |
|
479 |
map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); |
|
480 |
if (_cb->oop_maps() != NULL) { |
|
481 |
OopMapSet::update_register_map(this, map); |
|
482 |
} |
|
483 |
||
484 |
// Since the prolog does the save and restore of FP there is no |
|
485 |
// oopmap for it so we must fill in its location as if there was |
|
486 |
// an oopmap entry since if our caller was compiled code there |
|
487 |
// could be live jvm state in it. |
|
488 |
update_map_with_saved_link(map, saved_fp_addr); |
|
489 |
} |
|
490 |
||
491 |
return frame(l_sender_sp, unextended_sp, *saved_fp_addr, sender_pc); |
|
492 |
} |
|
493 |
||
494 |
//------------------------------------------------------------------------------ |
|
495 |
// frame::sender |
|
496 |
frame frame::sender(RegisterMap* map) const { |
|
497 |
// Default is we done have to follow them. The sender_for_xxx will |
|
498 |
// update it accordingly |
|
499 |
map->set_include_argument_oops(false); |
|
500 |
||
501 |
if (is_entry_frame()) |
|
502 |
return sender_for_entry_frame(map); |
|
503 |
if (is_interpreted_frame()) |
|
504 |
return sender_for_interpreter_frame(map); |
|
505 |
assert(_cb == CodeCache::find_blob(pc()),"Must be the same"); |
|
506 |
||
507 |
// This test looks odd: why is it not is_compiled_frame() ? That's |
|
508 |
// because stubs also have OOP maps. |
|
509 |
if (_cb != NULL) { |
|
510 |
return sender_for_compiled_frame(map); |
|
511 |
} |
|
512 |
||
513 |
// Must be native-compiled frame, i.e. the marshaling code for native |
|
514 |
// methods that exists in the core system. |
|
515 |
return frame(sender_sp(), link(), sender_pc()); |
|
516 |
} |
|
517 |
||
518 |
bool frame::is_interpreted_frame_valid(JavaThread* thread) const { |
|
519 |
assert(is_interpreted_frame(), "Not an interpreted frame"); |
|
520 |
// These are reasonable sanity checks |
|
521 |
if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) { |
|
522 |
return false; |
|
523 |
} |
|
524 |
if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) { |
|
525 |
return false; |
|
526 |
} |
|
527 |
if (fp() + interpreter_frame_initial_sp_offset < sp()) { |
|
528 |
return false; |
|
529 |
} |
|
530 |
// These are hacks to keep us out of trouble. |
|
531 |
// The problem with these is that they mask other problems |
|
532 |
if (fp() <= sp()) { // this attempts to deal with unsigned comparison above |
|
533 |
return false; |
|
534 |
} |
|
535 |
||
536 |
// do some validation of frame elements |
|
537 |
||
538 |
// first the method |
|
539 |
||
540 |
Method* m = *interpreter_frame_method_addr(); |
|
541 |
||
542 |
// validate the method we'd find in this potential sender |
|
51263
b5aac518b097
8207779: Method::is_valid_method() compares 'this' with NULL
hseigel
parents:
50743
diff
changeset
|
543 |
if (!Method::is_valid_method(m)) return false; |
29183 | 544 |
|
545 |
// stack frames shouldn't be much larger than max_stack elements |
|
29192
a7438efd99ec
8071947: AARCH64: frame::safe_for_sender() computes incorrect sender_sp value for interpreted frames
aph
parents:
29183
diff
changeset
|
546 |
// this test requires the use of unextended_sp which is the sp as seen by |
a7438efd99ec
8071947: AARCH64: frame::safe_for_sender() computes incorrect sender_sp value for interpreted frames
aph
parents:
29183
diff
changeset
|
547 |
// the current frame, and not sp which is the "raw" pc which could point |
a7438efd99ec
8071947: AARCH64: frame::safe_for_sender() computes incorrect sender_sp value for interpreted frames
aph
parents:
29183
diff
changeset
|
548 |
// further because of local variables of the callee method inserted after |
a7438efd99ec
8071947: AARCH64: frame::safe_for_sender() computes incorrect sender_sp value for interpreted frames
aph
parents:
29183
diff
changeset
|
549 |
// method arguments |
a7438efd99ec
8071947: AARCH64: frame::safe_for_sender() computes incorrect sender_sp value for interpreted frames
aph
parents:
29183
diff
changeset
|
550 |
if (fp() - unextended_sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) { |
29183 | 551 |
return false; |
552 |
} |
|
553 |
||
554 |
// validate bci/bcx |
|
555 |
||
556 |
address bcp = interpreter_frame_bcp(); |
|
557 |
if (m->validate_bci_from_bcp(bcp) < 0) { |
|
558 |
return false; |
|
559 |
} |
|
560 |
||
561 |
// validate constantPoolCache* |
|
562 |
ConstantPoolCache* cp = *interpreter_frame_cache_addr(); |
|
54437
2ae93028bef3
8221539: [metaspace] Improve MetaspaceObj::is_metaspace_obj() and friends
stuefe
parents:
53590
diff
changeset
|
563 |
if (MetaspaceObj::is_valid(cp) == false) return false; |
29183 | 564 |
|
565 |
// validate locals |
|
566 |
||
567 |
address locals = (address) *interpreter_frame_locals_addr(); |
|
568 |
||
569 |
if (locals > thread->stack_base() || locals < (address) fp()) return false; |
|
570 |
||
571 |
// We'd have to be pretty unlucky to be mislead at this point |
|
572 |
return true; |
|
573 |
} |
|
574 |
||
575 |
BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) { |
|
576 |
assert(is_interpreted_frame(), "interpreted frame expected"); |
|
577 |
Method* method = interpreter_frame_method(); |
|
578 |
BasicType type = method->result_type(); |
|
579 |
||
580 |
intptr_t* tos_addr; |
|
581 |
if (method->is_native()) { |
|
582 |
// TODO : ensure AARCH64 does the same as Intel here i.e. push v0 then r0 |
|
583 |
// Prior to calling into the runtime to report the method_exit the possible |
|
584 |
// return value is pushed to the native stack. If the result is a jfloat/jdouble |
|
585 |
// then ST0 is saved before EAX/EDX. See the note in generate_native_result |
|
586 |
tos_addr = (intptr_t*)sp(); |
|
587 |
if (type == T_FLOAT || type == T_DOUBLE) { |
|
588 |
// This is times two because we do a push(ltos) after pushing XMM0 |
|
589 |
// and that takes two interpreter stack slots. |
|
590 |
tos_addr += 2 * Interpreter::stackElementWords; |
|
591 |
} |
|
592 |
} else { |
|
593 |
tos_addr = (intptr_t*)interpreter_frame_tos_address(); |
|
594 |
} |
|
595 |
||
596 |
switch (type) { |
|
597 |
case T_OBJECT : |
|
598 |
case T_ARRAY : { |
|
599 |
oop obj; |
|
600 |
if (method->is_native()) { |
|
601 |
obj = cast_to_oop(at(interpreter_frame_oop_temp_offset)); |
|
602 |
} else { |
|
603 |
oop* obj_p = (oop*)tos_addr; |
|
604 |
obj = (obj_p == NULL) ? (oop)NULL : *obj_p; |
|
605 |
} |
|
606 |
assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); |
|
607 |
*oop_result = obj; |
|
608 |
break; |
|
609 |
} |
|
610 |
case T_BOOLEAN : value_result->z = *(jboolean*)tos_addr; break; |
|
611 |
case T_BYTE : value_result->b = *(jbyte*)tos_addr; break; |
|
612 |
case T_CHAR : value_result->c = *(jchar*)tos_addr; break; |
|
613 |
case T_SHORT : value_result->s = *(jshort*)tos_addr; break; |
|
614 |
case T_INT : value_result->i = *(jint*)tos_addr; break; |
|
615 |
case T_LONG : value_result->j = *(jlong*)tos_addr; break; |
|
616 |
case T_FLOAT : { |
|
617 |
value_result->f = *(jfloat*)tos_addr; |
|
618 |
break; |
|
619 |
} |
|
620 |
case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break; |
|
621 |
case T_VOID : /* Nothing to do */ break; |
|
622 |
default : ShouldNotReachHere(); |
|
623 |
} |
|
624 |
||
625 |
return type; |
|
626 |
} |
|
627 |
||
628 |
||
629 |
intptr_t* frame::interpreter_frame_tos_at(jint offset) const { |
|
630 |
int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); |
|
631 |
return &interpreter_frame_tos_address()[index]; |
|
632 |
} |
|
633 |
||
634 |
#ifndef PRODUCT |
|
635 |
||
636 |
#define DESCRIBE_FP_OFFSET(name) \ |
|
637 |
values.describe(frame_no, fp() + frame::name##_offset, #name) |
|
638 |
||
639 |
void frame::describe_pd(FrameValues& values, int frame_no) { |
|
640 |
if (is_interpreted_frame()) { |
|
641 |
DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp); |
|
642 |
DESCRIBE_FP_OFFSET(interpreter_frame_last_sp); |
|
643 |
DESCRIBE_FP_OFFSET(interpreter_frame_method); |
|
644 |
DESCRIBE_FP_OFFSET(interpreter_frame_mdp); |
|
43439
5e03c9ba74f3
8172144: AArch64: Implement "JEP 270: Reserved Stack Areas for Critical Sections"
aph
parents:
42051
diff
changeset
|
645 |
DESCRIBE_FP_OFFSET(interpreter_frame_mirror); |
29183 | 646 |
DESCRIBE_FP_OFFSET(interpreter_frame_cache); |
647 |
DESCRIBE_FP_OFFSET(interpreter_frame_locals); |
|
648 |
DESCRIBE_FP_OFFSET(interpreter_frame_bcp); |
|
649 |
DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp); |
|
650 |
} |
|
651 |
} |
|
652 |
#endif |
|
653 |
||
654 |
intptr_t *frame::initial_deoptimization_info() { |
|
655 |
// Not used on aarch64, but we must return something. |
|
656 |
return NULL; |
|
657 |
} |
|
658 |
||
659 |
intptr_t* frame::real_fp() const { |
|
660 |
if (_cb != NULL) { |
|
661 |
// use the frame size if valid |
|
662 |
int size = _cb->frame_size(); |
|
663 |
if (size > 0) { |
|
664 |
return unextended_sp() + size; |
|
665 |
} |
|
666 |
} |
|
667 |
// else rely on fp() |
|
668 |
assert(! is_compiled_frame(), "unknown compiled frame size"); |
|
669 |
return fp(); |
|
670 |
} |
|
671 |
||
672 |
#undef DESCRIBE_FP_OFFSET |
|
673 |
||
674 |
#define DESCRIBE_FP_OFFSET(name) \ |
|
675 |
{ \ |
|
676 |
unsigned long *p = (unsigned long *)fp; \ |
|
677 |
printf("0x%016lx 0x%016lx %s\n", (unsigned long)(p + frame::name##_offset), \ |
|
678 |
p[frame::name##_offset], #name); \ |
|
679 |
} |
|
680 |
||
681 |
static __thread unsigned long nextfp; |
|
682 |
static __thread unsigned long nextpc; |
|
683 |
static __thread unsigned long nextsp; |
|
684 |
static __thread RegisterMap *reg_map; |
|
685 |
||
686 |
static void printbc(Method *m, intptr_t bcx) { |
|
687 |
const char *name; |
|
688 |
char buf[16]; |
|
689 |
if (m->validate_bci_from_bcp((address)bcx) < 0 |
|
690 |
|| !m->contains((address)bcx)) { |
|
691 |
name = "???"; |
|
692 |
snprintf(buf, sizeof buf, "(bad)"); |
|
693 |
} else { |
|
694 |
int bci = m->bci_from((address)bcx); |
|
695 |
snprintf(buf, sizeof buf, "%d", bci); |
|
696 |
name = Bytecodes::name(m->code_at(bci)); |
|
697 |
} |
|
698 |
ResourceMark rm; |
|
699 |
printf("%s : %s ==> %s\n", m->name_and_sig_as_C_string(), buf, name); |
|
700 |
} |
|
701 |
||
702 |
void internal_pf(unsigned long sp, unsigned long fp, unsigned long pc, unsigned long bcx) { |
|
703 |
if (! fp) |
|
704 |
return; |
|
705 |
||
706 |
DESCRIBE_FP_OFFSET(return_addr); |
|
707 |
DESCRIBE_FP_OFFSET(link); |
|
708 |
DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp); |
|
709 |
DESCRIBE_FP_OFFSET(interpreter_frame_last_sp); |
|
710 |
DESCRIBE_FP_OFFSET(interpreter_frame_method); |
|
711 |
DESCRIBE_FP_OFFSET(interpreter_frame_mdp); |
|
712 |
DESCRIBE_FP_OFFSET(interpreter_frame_cache); |
|
713 |
DESCRIBE_FP_OFFSET(interpreter_frame_locals); |
|
714 |
DESCRIBE_FP_OFFSET(interpreter_frame_bcp); |
|
715 |
DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp); |
|
716 |
unsigned long *p = (unsigned long *)fp; |
|
717 |
||
718 |
// We want to see all frames, native and Java. For compiled and |
|
719 |
// interpreted frames we have special information that allows us to |
|
720 |
// unwind them; for everything else we assume that the native frame |
|
721 |
// pointer chain is intact. |
|
722 |
frame this_frame((intptr_t*)sp, (intptr_t*)fp, (address)pc); |
|
723 |
if (this_frame.is_compiled_frame() || |
|
724 |
this_frame.is_interpreted_frame()) { |
|
725 |
frame sender = this_frame.sender(reg_map); |
|
726 |
nextfp = (unsigned long)sender.fp(); |
|
727 |
nextpc = (unsigned long)sender.pc(); |
|
728 |
nextsp = (unsigned long)sender.unextended_sp(); |
|
729 |
} else { |
|
730 |
nextfp = p[frame::link_offset]; |
|
731 |
nextpc = p[frame::return_addr_offset]; |
|
732 |
nextsp = (unsigned long)&p[frame::sender_sp_offset]; |
|
733 |
} |
|
734 |
||
735 |
if (bcx == -1ul) |
|
736 |
bcx = p[frame::interpreter_frame_bcp_offset]; |
|
737 |
||
738 |
if (Interpreter::contains((address)pc)) { |
|
739 |
Method* m = (Method*)p[frame::interpreter_frame_method_offset]; |
|
740 |
if(m && m->is_method()) { |
|
741 |
printbc(m, bcx); |
|
742 |
} else |
|
743 |
printf("not a Method\n"); |
|
744 |
} else { |
|
745 |
CodeBlob *cb = CodeCache::find_blob((address)pc); |
|
746 |
if (cb != NULL) { |
|
747 |
if (cb->is_nmethod()) { |
|
748 |
ResourceMark rm; |
|
749 |
nmethod* nm = (nmethod*)cb; |
|
750 |
printf("nmethod %s\n", nm->method()->name_and_sig_as_C_string()); |
|
751 |
} else if (cb->name()) { |
|
752 |
printf("CodeBlob %s\n", cb->name()); |
|
753 |
} |
|
754 |
} |
|
755 |
} |
|
756 |
} |
|
757 |
||
758 |
extern "C" void npf() { |
|
759 |
CodeBlob *cb = CodeCache::find_blob((address)nextpc); |
|
760 |
// C2 does not always chain the frame pointers when it can, instead |
|
761 |
// preferring to use fixed offsets from SP, so a simple leave() does |
|
762 |
// not work. Instead, it adds the frame size to SP then pops FP and |
|
763 |
// LR. We have to do the same thing to get a good call chain. |
|
764 |
if (cb && cb->frame_size()) |
|
765 |
nextfp = nextsp + wordSize * (cb->frame_size() - 2); |
|
766 |
internal_pf (nextsp, nextfp, nextpc, -1); |
|
767 |
} |
|
768 |
||
769 |
extern "C" void pf(unsigned long sp, unsigned long fp, unsigned long pc, |
|
770 |
unsigned long bcx, unsigned long thread) { |
|
771 |
if (!reg_map) { |
|
55398
e53ec3b362f4
8224851: AArch64: fix warnings and errors with Clang and GCC 8.3
ngasson
parents:
54786
diff
changeset
|
772 |
reg_map = NEW_C_HEAP_OBJ(RegisterMap, mtNone); |
e53ec3b362f4
8224851: AArch64: fix warnings and errors with Clang and GCC 8.3
ngasson
parents:
54786
diff
changeset
|
773 |
::new (reg_map) RegisterMap((JavaThread*)thread, false); |
e53ec3b362f4
8224851: AArch64: fix warnings and errors with Clang and GCC 8.3
ngasson
parents:
54786
diff
changeset
|
774 |
} else { |
e53ec3b362f4
8224851: AArch64: fix warnings and errors with Clang and GCC 8.3
ngasson
parents:
54786
diff
changeset
|
775 |
*reg_map = RegisterMap((JavaThread*)thread, false); |
29183 | 776 |
} |
55398
e53ec3b362f4
8224851: AArch64: fix warnings and errors with Clang and GCC 8.3
ngasson
parents:
54786
diff
changeset
|
777 |
|
29183 | 778 |
{ |
779 |
CodeBlob *cb = CodeCache::find_blob((address)pc); |
|
780 |
if (cb && cb->frame_size()) |
|
781 |
fp = sp + wordSize * (cb->frame_size() - 2); |
|
782 |
} |
|
783 |
internal_pf(sp, fp, pc, bcx); |
|
784 |
} |
|
785 |
||
786 |
// support for printing out where we are in a Java method |
|
787 |
// needs to be passed current fp and bcp register values |
|
788 |
// prints method name, bc index and bytecode name |
|
789 |
extern "C" void pm(unsigned long fp, unsigned long bcx) { |
|
790 |
DESCRIBE_FP_OFFSET(interpreter_frame_method); |
|
791 |
unsigned long *p = (unsigned long *)fp; |
|
792 |
Method* m = (Method*)p[frame::interpreter_frame_method_offset]; |
|
793 |
printbc(m, bcx); |
|
794 |
} |
|
795 |
||
796 |
#ifndef PRODUCT |
|
797 |
// This is a generic constructor which is only used by pns() in debug.cpp. |
|
798 |
frame::frame(void* sp, void* fp, void* pc) { |
|
799 |
init((intptr_t*)sp, (intptr_t*)fp, (address)pc); |
|
800 |
} |
|
46589 | 801 |
|
802 |
void frame::pd_ps() {} |
|
29183 | 803 |
#endif |
40643 | 804 |
|
805 |
void JavaFrameAnchor::make_walkable(JavaThread* thread) { |
|
806 |
// last frame set? |
|
807 |
if (last_Java_sp() == NULL) return; |
|
808 |
// already walkable? |
|
809 |
if (walkable()) return; |
|
810 |
vmassert(Thread::current() == (Thread*)thread, "not current thread"); |
|
811 |
vmassert(last_Java_sp() != NULL, "not called from Java code?"); |
|
812 |
vmassert(last_Java_pc() == NULL, "already walkable"); |
|
813 |
capture_last_Java_pc(); |
|
814 |
vmassert(walkable(), "something went wrong"); |
|
815 |
} |
|
816 |
||
817 |
void JavaFrameAnchor::capture_last_Java_pc() { |
|
818 |
vmassert(_last_Java_sp != NULL, "no last frame set"); |
|
819 |
vmassert(_last_Java_pc == NULL, "already walkable"); |
|
820 |
_last_Java_pc = (address)_last_Java_sp[-1]; |
|
821 |
} |