author | gziemski |
Wed, 31 Jan 2018 11:12:12 -0600 | |
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permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2017, Oracle and/or its affiliates. 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 "classfile/systemDictionary.hpp" |
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#include "code/codeCache.hpp" |
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#include "code/compiledIC.hpp" |
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#include "code/icBuffer.hpp" |
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#include "code/nmethod.hpp" |
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#include "code/vtableStubs.hpp" |
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#include "interpreter/interpreter.hpp" |
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#include "interpreter/linkResolver.hpp" |
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#include "memory/metadataFactory.hpp" |
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#include "memory/oopFactory.hpp" |
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#include "memory/resourceArea.hpp" |
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#include "oops/method.hpp" |
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#include "oops/oop.inline.hpp" |
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#include "oops/symbol.hpp" |
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#include "runtime/icache.hpp" |
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#include "runtime/sharedRuntime.hpp" |
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#include "runtime/stubRoutines.hpp" |
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#include "utilities/events.hpp" |
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// Every time a compiled IC is changed or its type is being accessed, |
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// either the CompiledIC_lock must be set or we must be at a safe point. |
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//----------------------------------------------------------------------------- |
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// Low-level access to an inline cache. Private, since they might not be |
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// MT-safe to use. |
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void* CompiledIC::cached_value() const { |
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assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
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assert (!is_optimized(), "an optimized virtual call does not have a cached metadata"); |
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if (!is_in_transition_state()) { |
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void* data = get_data(); |
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// If we let the metadata value here be initialized to zero... |
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assert(data != NULL || Universe::non_oop_word() == NULL, |
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"no raw nulls in CompiledIC metadatas, because of patching races"); |
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return (data == (void*)Universe::non_oop_word()) ? NULL : data; |
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} else { |
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return InlineCacheBuffer::cached_value_for((CompiledIC *)this); |
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} |
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} |
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void CompiledIC::internal_set_ic_destination(address entry_point, bool is_icstub, void* cache, bool is_icholder) { |
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assert(entry_point != NULL, "must set legal entry point"); |
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assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
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assert (!is_optimized() || cache == NULL, "an optimized virtual call does not have a cached metadata"); |
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assert (cache == NULL || cache != (Metadata*)badOopVal, "invalid metadata"); |
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assert(!is_icholder || is_icholder_entry(entry_point), "must be"); |
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// Don't use ic_destination for this test since that forwards |
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// through ICBuffer instead of returning the actual current state of |
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// the CompiledIC. |
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if (is_icholder_entry(_call->destination())) { |
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// When patching for the ICStub case the cached value isn't |
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// overwritten until the ICStub copied into the CompiledIC during |
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// the next safepoint. Make sure that the CompiledICHolder* is |
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// marked for release at this point since it won't be identifiable |
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// once the entry point is overwritten. |
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InlineCacheBuffer::queue_for_release((CompiledICHolder*)get_data()); |
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} |
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if (TraceCompiledIC) { |
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tty->print(" "); |
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print_compiled_ic(); |
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tty->print(" changing destination to " INTPTR_FORMAT, p2i(entry_point)); |
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if (!is_optimized()) { |
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tty->print(" changing cached %s to " INTPTR_FORMAT, is_icholder ? "icholder" : "metadata", p2i((address)cache)); |
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} |
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if (is_icstub) { |
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tty->print(" (icstub)"); |
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} |
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tty->cr(); |
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} |
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{ |
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MutexLockerEx pl(SafepointSynchronize::is_at_safepoint() ? NULL : Patching_lock, Mutex::_no_safepoint_check_flag); |
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#ifdef ASSERT |
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CodeBlob* cb = CodeCache::find_blob_unsafe(_call->instruction_address()); |
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assert(cb != NULL && cb->is_compiled(), "must be compiled"); |
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#endif |
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_call->set_destination_mt_safe(entry_point); |
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} |
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if (is_optimized() || is_icstub) { |
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// Optimized call sites don't have a cache value and ICStub call |
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// sites only change the entry point. Changing the value in that |
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// case could lead to MT safety issues. |
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assert(cache == NULL, "must be null"); |
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return; |
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} |
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if (cache == NULL) cache = (void*)Universe::non_oop_word(); |
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set_data((intptr_t)cache); |
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} |
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void CompiledIC::set_ic_destination(ICStub* stub) { |
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internal_set_ic_destination(stub->code_begin(), true, NULL, false); |
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} |
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address CompiledIC::ic_destination() const { |
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assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
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if (!is_in_transition_state()) { |
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return _call->destination(); |
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} else { |
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return InlineCacheBuffer::ic_destination_for((CompiledIC *)this); |
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} |
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} |
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bool CompiledIC::is_in_transition_state() const { |
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assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
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return InlineCacheBuffer::contains(_call->destination());; |
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} |
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bool CompiledIC::is_icholder_call() const { |
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assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
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return !_is_optimized && is_icholder_entry(ic_destination()); |
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} |
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// Returns native address of 'call' instruction in inline-cache. Used by |
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// the InlineCacheBuffer when it needs to find the stub. |
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address CompiledIC::stub_address() const { |
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assert(is_in_transition_state(), "should only be called when we are in a transition state"); |
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return _call->destination(); |
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} |
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// Clears the IC stub if the compiled IC is in transition state |
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void CompiledIC::clear_ic_stub() { |
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if (is_in_transition_state()) { |
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ICStub* stub = ICStub_from_destination_address(stub_address()); |
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stub->clear(); |
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} |
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} |
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//----------------------------------------------------------------------------- |
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// High-level access to an inline cache. Guaranteed to be MT-safe. |
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void CompiledIC::initialize_from_iter(RelocIterator* iter) { |
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assert(iter->addr() == _call->instruction_address(), "must find ic_call"); |
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if (iter->type() == relocInfo::virtual_call_type) { |
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virtual_call_Relocation* r = iter->virtual_call_reloc(); |
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_is_optimized = false; |
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_value = _call->get_load_instruction(r); |
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} else { |
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assert(iter->type() == relocInfo::opt_virtual_call_type, "must be a virtual call"); |
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_is_optimized = true; |
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_value = NULL; |
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} |
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} |
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CompiledIC::CompiledIC(CompiledMethod* cm, NativeCall* call) |
42650 | 185 |
: _method(cm) |
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{ |
42650 | 187 |
_call = _method->call_wrapper_at((address) call); |
188 |
address ic_call = _call->instruction_address(); |
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189 |
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assert(ic_call != NULL, "ic_call address must be set"); |
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assert(cm != NULL, "must pass compiled method"); |
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assert(cm->contains(ic_call), "must be in compiled method"); |
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193 |
|
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// Search for the ic_call at the given address. |
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RelocIterator iter(cm, ic_call, ic_call+1); |
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bool ret = iter.next(); |
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assert(ret == true, "relocInfo must exist at this address"); |
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assert(iter.addr() == ic_call, "must find ic_call"); |
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199 |
|
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initialize_from_iter(&iter); |
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201 |
} |
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202 |
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CompiledIC::CompiledIC(RelocIterator* iter) |
42650 | 204 |
: _method(iter->code()) |
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{ |
42650 | 206 |
_call = _method->call_wrapper_at(iter->addr()); |
207 |
address ic_call = _call->instruction_address(); |
|
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208 |
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209 |
CompiledMethod* nm = iter->code(); |
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210 |
assert(ic_call != NULL, "ic_call address must be set"); |
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assert(nm != NULL, "must pass compiled method"); |
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assert(nm->contains(ic_call), "must be in compiled method"); |
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213 |
|
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initialize_from_iter(iter); |
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215 |
} |
1 | 216 |
|
20072 | 217 |
bool CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) { |
1 | 218 |
assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
219 |
assert(!is_optimized(), "cannot set an optimized virtual call to megamorphic"); |
|
220 |
assert(is_call_to_compiled() || is_call_to_interpreted(), "going directly to megamorphic?"); |
|
221 |
||
222 |
address entry; |
|
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if (call_info->call_kind() == CallInfo::itable_call) { |
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assert(bytecode == Bytecodes::_invokeinterface, ""); |
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int itable_index = call_info->itable_index(); |
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226 |
entry = VtableStubs::find_itable_stub(itable_index); |
48824 | 227 |
if (entry == NULL) { |
20072 | 228 |
return false; |
229 |
} |
|
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230 |
#ifdef ASSERT |
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int index = call_info->resolved_method()->itable_index(); |
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232 |
assert(index == itable_index, "CallInfo pre-computes this"); |
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InstanceKlass* k = call_info->resolved_method()->method_holder(); |
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234 |
assert(k->verify_itable_index(itable_index), "sanity check"); |
48557 | 235 |
#endif //ASSERT |
236 |
CompiledICHolder* holder = new CompiledICHolder(call_info->resolved_method()->method_holder(), |
|
237 |
call_info->resolved_klass()); |
|
238 |
holder->claim(); |
|
239 |
InlineCacheBuffer::create_transition_stub(this, holder, entry); |
|
1 | 240 |
} else { |
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241 |
assert(call_info->call_kind() == CallInfo::vtable_call, "either itable or vtable"); |
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242 |
// Can be different than selected_method->vtable_index(), due to package-private etc. |
1 | 243 |
int vtable_index = call_info->vtable_index(); |
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assert(call_info->resolved_klass()->verify_vtable_index(vtable_index), "sanity check"); |
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245 |
entry = VtableStubs::find_vtable_stub(vtable_index); |
20072 | 246 |
if (entry == NULL) { |
247 |
return false; |
|
248 |
} |
|
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|
249 |
InlineCacheBuffer::create_transition_stub(this, NULL, entry); |
1 | 250 |
} |
251 |
||
252 |
if (TraceICs) { |
|
253 |
ResourceMark rm; |
|
254 |
tty->print_cr ("IC@" INTPTR_FORMAT ": to megamorphic %s entry: " INTPTR_FORMAT, |
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p2i(instruction_address()), call_info->selected_method()->print_value_string(), p2i(entry)); |
1 | 256 |
} |
257 |
||
258 |
// We can't check this anymore. With lazy deopt we could have already |
|
259 |
// cleaned this IC entry before we even return. This is possible if |
|
260 |
// we ran out of space in the inline cache buffer trying to do the |
|
261 |
// set_next and we safepointed to free up space. This is a benign |
|
262 |
// race because the IC entry was complete when we safepointed so |
|
263 |
// cleaning it immediately is harmless. |
|
264 |
// assert(is_megamorphic(), "sanity check"); |
|
20072 | 265 |
return true; |
1 | 266 |
} |
267 |
||
268 |
||
269 |
// true if destination is megamorphic stub |
|
270 |
bool CompiledIC::is_megamorphic() const { |
|
271 |
assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
|
272 |
assert(!is_optimized(), "an optimized call cannot be megamorphic"); |
|
273 |
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274 |
// Cannot rely on cached_value. It is either an interface or a method. |
1 | 275 |
return VtableStubs::is_entry_point(ic_destination()); |
276 |
} |
|
277 |
||
278 |
bool CompiledIC::is_call_to_compiled() const { |
|
279 |
assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
|
280 |
||
281 |
// Use unsafe, since an inline cache might point to a zombie method. However, the zombie |
|
282 |
// method is guaranteed to still exist, since we only remove methods after all inline caches |
|
283 |
// has been cleaned up |
|
284 |
CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination()); |
|
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bool is_monomorphic = (cb != NULL && cb->is_compiled()); |
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286 |
// Check that the cached_value is a klass for non-optimized monomorphic calls |
1 | 287 |
// This assertion is invalid for compiler1: a call that does not look optimized (no static stub) can be used |
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// for calling directly to vep without using the inline cache (i.e., cached_value == NULL). |
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289 |
// For JVMCI this occurs because CHA is only used to improve inlining so call sites which could be optimized |
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290 |
// virtuals because there are no currently loaded subclasses of a type are left as virtual call sites. |
1 | 291 |
#ifdef ASSERT |
292 |
CodeBlob* caller = CodeCache::find_blob_unsafe(instruction_address()); |
|
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293 |
bool is_c1_or_jvmci_method = caller->is_compiled_by_c1() || caller->is_compiled_by_jvmci(); |
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|
294 |
assert( is_c1_or_jvmci_method || |
1 | 295 |
!is_monomorphic || |
296 |
is_optimized() || |
|
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!caller->is_alive() || |
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298 |
(cached_metadata() != NULL && cached_metadata()->is_klass()), "sanity check"); |
1 | 299 |
#endif // ASSERT |
300 |
return is_monomorphic; |
|
301 |
} |
|
302 |
||
303 |
||
304 |
bool CompiledIC::is_call_to_interpreted() const { |
|
305 |
assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
|
306 |
// Call to interpreter if destination is either calling to a stub (if it |
|
307 |
// is optimized), or calling to an I2C blob |
|
308 |
bool is_call_to_interpreted = false; |
|
309 |
if (!is_optimized()) { |
|
310 |
// must use unsafe because the destination can be a zombie (and we're cleaning) |
|
311 |
// and the print_compiled_ic code wants to know if site (in the non-zombie) |
|
312 |
// is to the interpreter. |
|
313 |
CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination()); |
|
314 |
is_call_to_interpreted = (cb != NULL && cb->is_adapter_blob()); |
|
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|
315 |
assert(!is_call_to_interpreted || (is_icholder_call() && cached_icholder() != NULL), "sanity check"); |
1 | 316 |
} else { |
317 |
// Check if we are calling into our own codeblob (i.e., to a stub) |
|
318 |
address dest = ic_destination(); |
|
319 |
#ifdef ASSERT |
|
320 |
{ |
|
42650 | 321 |
_call->verify_resolve_call(dest); |
1 | 322 |
} |
323 |
#endif /* ASSERT */ |
|
42650 | 324 |
is_call_to_interpreted = _call->is_call_to_interpreted(dest); |
1 | 325 |
} |
326 |
return is_call_to_interpreted; |
|
327 |
} |
|
328 |
||
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|
329 |
void CompiledIC::set_to_clean(bool in_use) { |
1 | 330 |
assert(SafepointSynchronize::is_at_safepoint() || CompiledIC_lock->is_locked() , "MT-unsafe call"); |
331 |
if (TraceInlineCacheClearing || TraceICs) { |
|
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|
332 |
tty->print_cr("IC@" INTPTR_FORMAT ": set to clean", p2i(instruction_address())); |
1 | 333 |
print(); |
334 |
} |
|
335 |
||
42650 | 336 |
address entry = _call->get_resolve_call_stub(is_optimized()); |
1 | 337 |
|
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|
338 |
// A zombie transition will always be safe, since the metadata has already been set to NULL, so |
1 | 339 |
// we only need to patch the destination |
42650 | 340 |
bool safe_transition = _call->is_safe_for_patching() || !in_use || is_optimized() || SafepointSynchronize::is_at_safepoint(); |
1 | 341 |
|
342 |
if (safe_transition) { |
|
343 |
// Kill any leftover stub we might have too |
|
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|
344 |
clear_ic_stub(); |
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|
345 |
if (is_optimized()) { |
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|
346 |
set_ic_destination(entry); |
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|
347 |
} else { |
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348 |
set_ic_destination_and_value(entry, (void*)NULL); |
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349 |
} |
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|
350 |
} else { |
1 | 351 |
// Unsafe transition - create stub. |
352 |
InlineCacheBuffer::create_transition_stub(this, NULL, entry); |
|
353 |
} |
|
354 |
// We can't check this anymore. With lazy deopt we could have already |
|
355 |
// cleaned this IC entry before we even return. This is possible if |
|
356 |
// we ran out of space in the inline cache buffer trying to do the |
|
357 |
// set_next and we safepointed to free up space. This is a benign |
|
358 |
// race because the IC entry was complete when we safepointed so |
|
359 |
// cleaning it immediately is harmless. |
|
360 |
// assert(is_clean(), "sanity check"); |
|
361 |
} |
|
362 |
||
363 |
bool CompiledIC::is_clean() const { |
|
364 |
assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
|
365 |
bool is_clean = false; |
|
366 |
address dest = ic_destination(); |
|
42650 | 367 |
is_clean = dest == _call->get_resolve_call_stub(is_optimized()); |
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368 |
assert(!is_clean || is_optimized() || cached_value() == NULL, "sanity check"); |
1 | 369 |
return is_clean; |
370 |
} |
|
371 |
||
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372 |
void CompiledIC::set_to_monomorphic(CompiledICInfo& info) { |
1 | 373 |
assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
374 |
// Updating a cache to the wrong entry can cause bugs that are very hard |
|
375 |
// to track down - if cache entry gets invalid - we just clean it. In |
|
376 |
// this way it is always the same code path that is responsible for |
|
377 |
// updating and resolving an inline cache |
|
378 |
// |
|
379 |
// The above is no longer true. SharedRuntime::fixup_callers_callsite will change optimized |
|
380 |
// callsites. In addition ic_miss code will update a site to monomorphic if it determines |
|
381 |
// that an monomorphic call to the interpreter can now be monomorphic to compiled code. |
|
382 |
// |
|
383 |
// In both of these cases the only thing being modifed is the jump/call target and these |
|
384 |
// transitions are mt_safe |
|
385 |
||
386 |
Thread *thread = Thread::current(); |
|
42650 | 387 |
if (info.to_interpreter() || info.to_aot()) { |
1 | 388 |
// Call to interpreter |
389 |
if (info.is_optimized() && is_optimized()) { |
|
390 |
assert(is_clean(), "unsafe IC path"); |
|
391 |
MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); |
|
392 |
// the call analysis (callee structure) specifies that the call is optimized |
|
393 |
// (either because of CHA or the static target is final) |
|
394 |
// At code generation time, this call has been emitted as static call |
|
395 |
// Call via stub |
|
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|
396 |
assert(info.cached_metadata() != NULL && info.cached_metadata()->is_method(), "sanity check"); |
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|
397 |
methodHandle method (thread, (Method*)info.cached_metadata()); |
42650 | 398 |
_call->set_to_interpreted(method, info); |
399 |
||
1 | 400 |
if (TraceICs) { |
401 |
ResourceMark rm(thread); |
|
42650 | 402 |
tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to %s: %s", |
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changeset
|
403 |
p2i(instruction_address()), |
42650 | 404 |
(info.to_aot() ? "aot" : "interpreter"), |
1 | 405 |
method->print_value_string()); |
406 |
} |
|
407 |
} else { |
|
408 |
// Call via method-klass-holder |
|
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|
409 |
InlineCacheBuffer::create_transition_stub(this, info.claim_cached_icholder(), info.entry()); |
1 | 410 |
if (TraceICs) { |
411 |
ResourceMark rm(thread); |
|
24424
2658d7834c6e
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
22223
diff
changeset
|
412 |
tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via icholder ", p2i(instruction_address())); |
1 | 413 |
} |
414 |
} |
|
415 |
} else { |
|
416 |
// Call to compiled code |
|
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|
417 |
bool static_bound = info.is_optimized() || (info.cached_metadata() == NULL); |
1 | 418 |
#ifdef ASSERT |
419 |
CodeBlob* cb = CodeCache::find_blob_unsafe(info.entry()); |
|
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|
420 |
assert (cb->is_compiled(), "must be compiled!"); |
1 | 421 |
#endif /* ASSERT */ |
422 |
||
423 |
// This is MT safe if we come from a clean-cache and go through a |
|
424 |
// non-verified entry point |
|
425 |
bool safe = SafepointSynchronize::is_at_safepoint() || |
|
426 |
(!is_in_transition_state() && (info.is_optimized() || static_bound || is_clean())); |
|
427 |
||
428 |
if (!safe) { |
|
13728
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|
429 |
InlineCacheBuffer::create_transition_stub(this, info.cached_metadata(), info.entry()); |
1 | 430 |
} else { |
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changeset
|
431 |
if (is_optimized()) { |
35086
bbf32241d851
8072008: Emit direct call instead of linkTo* for recursive indy/MH.invoke* calls
vlivanov
parents:
33593
diff
changeset
|
432 |
set_ic_destination(info.entry()); |
13728
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|
433 |
} else { |
882756847a04
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|
434 |
set_ic_destination_and_value(info.entry(), info.cached_metadata()); |
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changeset
|
435 |
} |
1 | 436 |
} |
437 |
||
438 |
if (TraceICs) { |
|
439 |
ResourceMark rm(thread); |
|
13728
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parents:
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changeset
|
440 |
assert(info.cached_metadata() == NULL || info.cached_metadata()->is_klass(), "must be"); |
1 | 441 |
tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to compiled (rcvr klass) %s: %s", |
24424
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changeset
|
442 |
p2i(instruction_address()), |
13728
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changeset
|
443 |
((Klass*)info.cached_metadata())->print_value_string(), |
1 | 444 |
(safe) ? "" : "via stub"); |
445 |
} |
|
446 |
} |
|
447 |
// We can't check this anymore. With lazy deopt we could have already |
|
448 |
// cleaned this IC entry before we even return. This is possible if |
|
449 |
// we ran out of space in the inline cache buffer trying to do the |
|
450 |
// set_next and we safepointed to free up space. This is a benign |
|
451 |
// race because the IC entry was complete when we safepointed so |
|
452 |
// cleaning it immediately is harmless. |
|
453 |
// assert(is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); |
|
454 |
} |
|
455 |
||
456 |
||
42544
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changeset
|
457 |
// is_optimized: Compiler has generated an optimized call (i.e. fixed, no inline cache) |
58de8aaf9365
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changeset
|
458 |
// static_bound: The call can be static bound. If it isn't also optimized, the property |
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changeset
|
459 |
// wasn't provable at time of compilation. An optimized call will have any necessary |
58de8aaf9365
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parents:
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changeset
|
460 |
// null check, while a static_bound won't. A static_bound (but not optimized) must |
58de8aaf9365
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parents:
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changeset
|
461 |
// therefore use the unverified entry point. |
33593
60764a78fa5c
8140274: methodHandles and constantPoolHandles should be passed as const references
coleenp
parents:
33160
diff
changeset
|
462 |
void CompiledIC::compute_monomorphic_entry(const methodHandle& method, |
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
42650
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changeset
|
463 |
Klass* receiver_klass, |
1 | 464 |
bool is_optimized, |
465 |
bool static_bound, |
|
42650 | 466 |
bool caller_is_nmethod, |
1 | 467 |
CompiledICInfo& info, |
468 |
TRAPS) { |
|
38133
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rbackman
parents:
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changeset
|
469 |
CompiledMethod* method_code = method->code(); |
78b95467b9f1
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parents:
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changeset
|
470 |
|
1 | 471 |
address entry = NULL; |
22223 | 472 |
if (method_code != NULL && method_code->is_in_use()) { |
38133
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parents:
38035
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changeset
|
473 |
assert(method_code->is_compiled(), "must be compiled"); |
1 | 474 |
// Call to compiled code |
42544
58de8aaf9365
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parents:
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changeset
|
475 |
// |
58de8aaf9365
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diff
changeset
|
476 |
// Note: the following problem exists with Compiler1: |
58de8aaf9365
8160543: C1: Crash in java.lang.String.indexOf in some java.sql tests
neliasso
parents:
38133
diff
changeset
|
477 |
// - at compile time we may or may not know if the destination is final |
58de8aaf9365
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neliasso
parents:
38133
diff
changeset
|
478 |
// - if we know that the destination is final (is_optimized), we will emit |
58de8aaf9365
8160543: C1: Crash in java.lang.String.indexOf in some java.sql tests
neliasso
parents:
38133
diff
changeset
|
479 |
// an optimized virtual call (no inline cache), and need a Method* to make |
58de8aaf9365
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neliasso
parents:
38133
diff
changeset
|
480 |
// a call to the interpreter |
58de8aaf9365
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neliasso
parents:
38133
diff
changeset
|
481 |
// - if we don't know if the destination is final, we emit a standard |
58de8aaf9365
8160543: C1: Crash in java.lang.String.indexOf in some java.sql tests
neliasso
parents:
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diff
changeset
|
482 |
// virtual call, and use CompiledICHolder to call interpreted code |
58de8aaf9365
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parents:
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diff
changeset
|
483 |
// (no static call stub has been generated) |
58de8aaf9365
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neliasso
parents:
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diff
changeset
|
484 |
// - In the case that we here notice the call is static bound we |
58de8aaf9365
8160543: C1: Crash in java.lang.String.indexOf in some java.sql tests
neliasso
parents:
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diff
changeset
|
485 |
// convert the call into what looks to be an optimized virtual call, |
58de8aaf9365
8160543: C1: Crash in java.lang.String.indexOf in some java.sql tests
neliasso
parents:
38133
diff
changeset
|
486 |
// but we must use the unverified entry point (since there will be no |
58de8aaf9365
8160543: C1: Crash in java.lang.String.indexOf in some java.sql tests
neliasso
parents:
38133
diff
changeset
|
487 |
// null check on a call when the target isn't loaded). |
58de8aaf9365
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neliasso
parents:
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diff
changeset
|
488 |
// This causes problems when verifying the IC because |
58de8aaf9365
8160543: C1: Crash in java.lang.String.indexOf in some java.sql tests
neliasso
parents:
38133
diff
changeset
|
489 |
// it looks vanilla but is optimized. Code in is_call_to_interpreted |
58de8aaf9365
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neliasso
parents:
38133
diff
changeset
|
490 |
// is aware of this and weakens its asserts. |
58de8aaf9365
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neliasso
parents:
38133
diff
changeset
|
491 |
if (is_optimized) { |
1 | 492 |
entry = method_code->verified_entry_point(); |
493 |
} else { |
|
494 |
entry = method_code->entry_point(); |
|
495 |
} |
|
496 |
} |
|
42650 | 497 |
bool far_c2a = entry != NULL && caller_is_nmethod && method_code->is_far_code(); |
498 |
if (entry != NULL && !far_c2a) { |
|
499 |
// Call to near compiled code (nmethod or aot). |
|
48001
600868bd3a8c
8169766: c1 + Xcomp reresolving call target every invocation
neliasso
parents:
47216
diff
changeset
|
500 |
info.set_compiled_entry(entry, is_optimized ? NULL : receiver_klass, is_optimized); |
1 | 501 |
} else { |
502 |
if (is_optimized) { |
|
42650 | 503 |
if (far_c2a) { |
504 |
// Call to aot code from nmethod. |
|
505 |
info.set_aot_entry(entry, method()); |
|
506 |
} else { |
|
507 |
// Use stub entry |
|
508 |
info.set_interpreter_entry(method()->get_c2i_entry(), method()); |
|
509 |
} |
|
1 | 510 |
} else { |
13728
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parents:
11636
diff
changeset
|
511 |
// Use icholder entry |
38133
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
38035
diff
changeset
|
512 |
assert(method_code == NULL || method_code->is_compiled(), "must be compiled"); |
46329
53ccc37bda19
8155672: Remove instanceKlassHandles and KlassHandles
coleenp
parents:
42650
diff
changeset
|
513 |
CompiledICHolder* holder = new CompiledICHolder(method(), receiver_klass); |
13728
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coleenp
parents:
11636
diff
changeset
|
514 |
info.set_icholder_entry(method()->get_c2i_unverified_entry(), holder); |
1 | 515 |
} |
516 |
} |
|
13728
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coleenp
parents:
11636
diff
changeset
|
517 |
assert(info.is_optimized() == is_optimized, "must agree"); |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
11636
diff
changeset
|
518 |
} |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
11636
diff
changeset
|
519 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
11636
diff
changeset
|
520 |
|
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
11636
diff
changeset
|
521 |
bool CompiledIC::is_icholder_entry(address entry) { |
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
11636
diff
changeset
|
522 |
CodeBlob* cb = CodeCache::find_blob_unsafe(entry); |
48557 | 523 |
if (cb != NULL && cb->is_adapter_blob()) { |
524 |
return true; |
|
525 |
} |
|
526 |
// itable stubs also use CompiledICHolder |
|
527 |
if (VtableStubs::is_entry_point(entry) && VtableStubs::stub_containing(entry)->is_itable_stub()) { |
|
528 |
return true; |
|
529 |
} |
|
530 |
return false; |
|
1 | 531 |
} |
532 |
||
42650 | 533 |
bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site, const CompiledMethod* cm) { |
534 |
// This call site might have become stale so inspect it carefully. |
|
535 |
address dest = cm->call_wrapper_at(call_site->addr())->destination(); |
|
536 |
return is_icholder_entry(dest); |
|
537 |
} |
|
538 |
||
38035
a6105022c551
8153818: Move similar CompiledIC platform specific code to shared code.
kvn
parents:
37248
diff
changeset
|
539 |
// Release the CompiledICHolder* associated with this call site is there is one. |
42650 | 540 |
void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site, const CompiledMethod* cm) { |
541 |
assert(cm->is_nmethod(), "must be nmethod"); |
|
38035
a6105022c551
8153818: Move similar CompiledIC platform specific code to shared code.
kvn
parents:
37248
diff
changeset
|
542 |
// This call site might have become stale so inspect it carefully. |
a6105022c551
8153818: Move similar CompiledIC platform specific code to shared code.
kvn
parents:
37248
diff
changeset
|
543 |
NativeCall* call = nativeCall_at(call_site->addr()); |
a6105022c551
8153818: Move similar CompiledIC platform specific code to shared code.
kvn
parents:
37248
diff
changeset
|
544 |
if (is_icholder_entry(call->destination())) { |
a6105022c551
8153818: Move similar CompiledIC platform specific code to shared code.
kvn
parents:
37248
diff
changeset
|
545 |
NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value()); |
a6105022c551
8153818: Move similar CompiledIC platform specific code to shared code.
kvn
parents:
37248
diff
changeset
|
546 |
InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data()); |
a6105022c551
8153818: Move similar CompiledIC platform specific code to shared code.
kvn
parents:
37248
diff
changeset
|
547 |
} |
a6105022c551
8153818: Move similar CompiledIC platform specific code to shared code.
kvn
parents:
37248
diff
changeset
|
548 |
} |
a6105022c551
8153818: Move similar CompiledIC platform specific code to shared code.
kvn
parents:
37248
diff
changeset
|
549 |
|
1 | 550 |
// ---------------------------------------------------------------------------- |
551 |
||
552 |
void CompiledStaticCall::set_to_clean() { |
|
553 |
assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); |
|
554 |
// Reset call site |
|
25492
d27050bdfb04
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
25491
diff
changeset
|
555 |
MutexLockerEx pl(SafepointSynchronize::is_at_safepoint() ? NULL : Patching_lock, Mutex::_no_safepoint_check_flag); |
1 | 556 |
#ifdef ASSERT |
42650 | 557 |
CodeBlob* cb = CodeCache::find_blob_unsafe(instruction_address()); |
38133
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
38035
diff
changeset
|
558 |
assert(cb != NULL && cb->is_compiled(), "must be compiled"); |
1 | 559 |
#endif |
42650 | 560 |
|
561 |
set_destination_mt_safe(resolve_call_stub()); |
|
1 | 562 |
|
563 |
// Do not reset stub here: It is too expensive to call find_stub. |
|
564 |
// Instead, rely on caller (nmethod::clear_inline_caches) to clear |
|
565 |
// both the call and its stub. |
|
566 |
} |
|
567 |
||
568 |
bool CompiledStaticCall::is_clean() const { |
|
42650 | 569 |
return destination() == resolve_call_stub(); |
1 | 570 |
} |
571 |
||
572 |
bool CompiledStaticCall::is_call_to_compiled() const { |
|
573 |
return CodeCache::contains(destination()); |
|
574 |
} |
|
575 |
||
42650 | 576 |
bool CompiledDirectStaticCall::is_call_to_interpreted() const { |
1 | 577 |
// It is a call to interpreted, if it calls to a stub. Hence, the destination |
578 |
// must be in the stub part of the nmethod that contains the call |
|
38133
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
38035
diff
changeset
|
579 |
CompiledMethod* cm = CodeCache::find_compiled(instruction_address()); |
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
38035
diff
changeset
|
580 |
return cm->stub_contains(destination()); |
1 | 581 |
} |
582 |
||
42650 | 583 |
bool CompiledDirectStaticCall::is_call_to_far() const { |
584 |
// It is a call to aot method, if it calls to a stub. Hence, the destination |
|
585 |
// must be in the stub part of the nmethod that contains the call |
|
586 |
CodeBlob* desc = CodeCache::find_blob(instruction_address()); |
|
587 |
return desc->as_compiled_method()->stub_contains(destination()); |
|
588 |
} |
|
589 |
||
590 |
void CompiledStaticCall::set_to_compiled(address entry) { |
|
591 |
if (TraceICs) { |
|
592 |
ResourceMark rm; |
|
593 |
tty->print_cr("%s@" INTPTR_FORMAT ": set_to_compiled " INTPTR_FORMAT, |
|
594 |
name(), |
|
595 |
p2i(instruction_address()), |
|
596 |
p2i(entry)); |
|
597 |
} |
|
598 |
// Call to compiled code |
|
599 |
assert(CodeCache::contains(entry), "wrong entry point"); |
|
600 |
set_destination_mt_safe(entry); |
|
601 |
} |
|
602 |
||
1 | 603 |
void CompiledStaticCall::set(const StaticCallInfo& info) { |
604 |
assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); |
|
605 |
MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); |
|
606 |
// Updating a cache to the wrong entry can cause bugs that are very hard |
|
607 |
// to track down - if cache entry gets invalid - we just clean it. In |
|
608 |
// this way it is always the same code path that is responsible for |
|
609 |
// updating and resolving an inline cache |
|
610 |
assert(is_clean(), "do not update a call entry - use clean"); |
|
611 |
||
612 |
if (info._to_interpreter) { |
|
613 |
// Call to interpreted code |
|
614 |
set_to_interpreted(info.callee(), info.entry()); |
|
42650 | 615 |
#if INCLUDE_AOT |
616 |
} else if (info._to_aot) { |
|
617 |
// Call to far code |
|
618 |
set_to_far(info.callee(), info.entry()); |
|
619 |
#endif |
|
1 | 620 |
} else { |
42650 | 621 |
set_to_compiled(info.entry()); |
1 | 622 |
} |
623 |
} |
|
624 |
||
625 |
// Compute settings for a CompiledStaticCall. Since we might have to set |
|
626 |
// the stub when calling to the interpreter, we need to return arguments. |
|
42650 | 627 |
void CompiledStaticCall::compute_entry(const methodHandle& m, bool caller_is_nmethod, StaticCallInfo& info) { |
38133
78b95467b9f1
8151956: Support non-continuous CodeBlobs in HotSpot
rbackman
parents:
38035
diff
changeset
|
628 |
CompiledMethod* m_code = m->code(); |
1 | 629 |
info._callee = m; |
22223 | 630 |
if (m_code != NULL && m_code->is_in_use()) { |
42650 | 631 |
if (caller_is_nmethod && m_code->is_far_code()) { |
632 |
// Call to far aot code from nmethod. |
|
633 |
info._to_aot = true; |
|
634 |
} else { |
|
635 |
info._to_aot = false; |
|
636 |
} |
|
1 | 637 |
info._to_interpreter = false; |
638 |
info._entry = m_code->verified_entry_point(); |
|
639 |
} else { |
|
640 |
// Callee is interpreted code. In any case entering the interpreter |
|
641 |
// puts a converter-frame on the stack to save arguments. |
|
26580
8cca7fbe77b8
8056154: JVM crash with EXCEPTION_ACCESS_VIOLATION when there are many threads running
iveresov
parents:
25492
diff
changeset
|
642 |
assert(!m->is_method_handle_intrinsic(), "Compiled code should never call interpreter MH intrinsics"); |
1 | 643 |
info._to_interpreter = true; |
644 |
info._entry = m()->get_c2i_entry(); |
|
645 |
} |
|
646 |
} |
|
647 |
||
42650 | 648 |
address CompiledDirectStaticCall::find_stub_for(address instruction, bool is_aot) { |
1 | 649 |
// Find reloc. information containing this call-site |
42650 | 650 |
RelocIterator iter((nmethod*)NULL, instruction); |
1 | 651 |
while (iter.next()) { |
42650 | 652 |
if (iter.addr() == instruction) { |
1 | 653 |
switch(iter.type()) { |
654 |
case relocInfo::static_call_type: |
|
42650 | 655 |
return iter.static_call_reloc()->static_stub(is_aot); |
1 | 656 |
// We check here for opt_virtual_call_type, since we reuse the code |
657 |
// from the CompiledIC implementation |
|
658 |
case relocInfo::opt_virtual_call_type: |
|
42650 | 659 |
return iter.opt_virtual_call_reloc()->static_stub(is_aot); |
1 | 660 |
case relocInfo::poll_type: |
661 |
case relocInfo::poll_return_type: // A safepoint can't overlap a call. |
|
662 |
default: |
|
663 |
ShouldNotReachHere(); |
|
664 |
} |
|
665 |
} |
|
666 |
} |
|
667 |
return NULL; |
|
668 |
} |
|
669 |
||
42650 | 670 |
address CompiledDirectStaticCall::find_stub(bool is_aot) { |
671 |
return CompiledDirectStaticCall::find_stub_for(instruction_address(), is_aot); |
|
672 |
} |
|
673 |
||
674 |
address CompiledDirectStaticCall::resolve_call_stub() const { |
|
675 |
return SharedRuntime::get_resolve_static_call_stub(); |
|
676 |
} |
|
1 | 677 |
|
678 |
//----------------------------------------------------------------------------- |
|
679 |
// Non-product mode code |
|
680 |
#ifndef PRODUCT |
|
681 |
||
682 |
void CompiledIC::verify() { |
|
42650 | 683 |
_call->verify(); |
1 | 684 |
assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted() |
685 |
|| is_optimized() || is_megamorphic(), "sanity check"); |
|
686 |
} |
|
687 |
||
688 |
void CompiledIC::print() { |
|
689 |
print_compiled_ic(); |
|
690 |
tty->cr(); |
|
691 |
} |
|
692 |
||
693 |
void CompiledIC::print_compiled_ic() { |
|
13728
882756847a04
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
11636
diff
changeset
|
694 |
tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT " cached_value " INTPTR_FORMAT, |
24424
2658d7834c6e
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
22223
diff
changeset
|
695 |
p2i(instruction_address()), is_call_to_interpreted() ? "interpreted " : "", p2i(ic_destination()), p2i(is_optimized() ? NULL : cached_value())); |
1 | 696 |
} |
697 |
||
42650 | 698 |
void CompiledDirectStaticCall::print() { |
24424
2658d7834c6e
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
22223
diff
changeset
|
699 |
tty->print("static call at " INTPTR_FORMAT " -> ", p2i(instruction_address())); |
1 | 700 |
if (is_clean()) { |
701 |
tty->print("clean"); |
|
702 |
} else if (is_call_to_compiled()) { |
|
703 |
tty->print("compiled"); |
|
42650 | 704 |
} else if (is_call_to_far()) { |
705 |
tty->print("far"); |
|
1 | 706 |
} else if (is_call_to_interpreted()) { |
707 |
tty->print("interpreted"); |
|
708 |
} |
|
709 |
tty->cr(); |
|
710 |
} |
|
711 |
||
17094
29c4955396d2
8003853: specify offset of IC load in java_to_interp stub
dlong
parents:
16377
diff
changeset
|
712 |
#endif // !PRODUCT |