src/hotspot/share/jvmci/compilerRuntime.cpp
author herrick
Wed, 27 Mar 2019 08:27:58 -0400
branchJDK-8200758-branch
changeset 57288 0be43184f52a
parent 53582 881c5fbeb849
child 54847 59ea39bb2809
permissions -rw-r--r--
Merge
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/*
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 * Copyright (c) 2016, 2019, 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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#include "precompiled.hpp"
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#include "aot/aotLoader.hpp"
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#include "classfile/stringTable.hpp"
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#include "classfile/symbolTable.hpp"
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#include "interpreter/linkResolver.hpp"
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#include "jvmci/compilerRuntime.hpp"
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#include "oops/cpCache.inline.hpp"
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#include "oops/oop.inline.hpp"
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#include "runtime/compilationPolicy.hpp"
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#include "runtime/deoptimization.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/interfaceSupport.inline.hpp"
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#include "runtime/vframe.inline.hpp"
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#include "utilities/sizes.hpp"
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// Resolve and allocate String
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JRT_BLOCK_ENTRY(void, CompilerRuntime::resolve_string_by_symbol(JavaThread *thread, void* string_result, const char* name))
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  JRT_BLOCK
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    oop str = *(oop*)string_result; // Is it resolved already?
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    if (str == NULL) { // Do resolution
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      // First 2 bytes of name contains length (number of bytes).
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      int len = Bytes::get_Java_u2((address)name);
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      name += 2;
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      TempNewSymbol sym = SymbolTable::new_symbol(name, len, CHECK);
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      str = StringTable::intern(sym, CHECK);
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      assert(java_lang_String::is_instance(str), "must be string");
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      *(oop*)string_result = str; // Store result
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    }
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    assert(str != NULL, "Should be allocated!");
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    thread->set_vm_result(str);
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  JRT_BLOCK_END
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JRT_END
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Klass* CompilerRuntime::resolve_klass_helper(JavaThread *thread, const char* name, int len, TRAPS) {
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  ResourceMark rm(THREAD);
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  // last java frame on stack (which includes native call frames)
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  RegisterMap cbl_map(thread, false);
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  // Skip stub
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  frame caller_frame = thread->last_frame().sender(&cbl_map);
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  CodeBlob* caller_cb = caller_frame.cb();
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  guarantee(caller_cb != NULL && caller_cb->is_compiled(), "must be called from compiled method");
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  CompiledMethod* caller_nm = caller_cb->as_compiled_method_or_null();
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  methodHandle caller(THREAD, caller_nm->method());
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  // Use class loader of aot method.
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  Handle loader(THREAD, caller->method_holder()->class_loader());
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  Handle protection_domain(THREAD, caller->method_holder()->protection_domain());
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  // Ignore wrapping L and ;
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  if (name[0] == 'L') {
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    assert(len > 2, "small name %s", name);
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    name++;
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    len -= 2;
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  }
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  TempNewSymbol sym = SymbolTable::new_symbol(name, len, CHECK_NULL);
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  if (sym == NULL) {
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    return NULL;
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  }
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  Klass* k = SystemDictionary::resolve_or_fail(sym, loader, protection_domain, true, CHECK_NULL);
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  return k;
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}
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// Resolve Klass
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JRT_BLOCK_ENTRY(Klass*, CompilerRuntime::resolve_klass_by_symbol(JavaThread *thread, Klass** klass_result, const char* name))
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  Klass* k = NULL;
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  JRT_BLOCK
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    k = *klass_result; // Is it resolved already?
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    if (k == NULL) { // Do resolution
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      // First 2 bytes of name contains length (number of bytes).
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      int len = Bytes::get_Java_u2((address)name);
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      name += 2;
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      k = CompilerRuntime::resolve_klass_helper(thread, name, len, CHECK_NULL);
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      *klass_result = k; // Store result
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    }
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  JRT_BLOCK_END
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  assert(k != NULL, " Should be loaded!");
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  return k;
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JRT_END
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Method* CompilerRuntime::resolve_method_helper(Klass* klass, const char* method_name, int method_name_len,
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                                                               const char* signature_name, int signature_name_len) {
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  Method* m = NULL;
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  TempNewSymbol name_symbol = SymbolTable::probe(method_name, method_name_len);
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  TempNewSymbol signature_symbol = SymbolTable::probe(signature_name, signature_name_len);
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  if (name_symbol != NULL && signature_symbol != NULL) {
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    if (name_symbol == vmSymbols::object_initializer_name() ||
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        name_symbol == vmSymbols::class_initializer_name()) {
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      // Never search superclasses for constructors
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      if (klass->is_instance_klass()) {
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        m = InstanceKlass::cast(klass)->find_method(name_symbol, signature_symbol);
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      }
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    } else {
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      m = klass->lookup_method(name_symbol, signature_symbol);
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      if (m == NULL && klass->is_instance_klass()) {
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        m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name_symbol, signature_symbol);
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      }
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    }
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  }
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  return m;
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}
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JRT_BLOCK_ENTRY(void, CompilerRuntime::resolve_dynamic_invoke(JavaThread *thread, oop* appendix_result))
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  JRT_BLOCK
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  {
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    ResourceMark rm(THREAD);
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    vframeStream vfst(thread, true);  // Do not skip and javaCalls
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    assert(!vfst.at_end(), "Java frame must exist");
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    methodHandle caller(THREAD, vfst.method());
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    InstanceKlass* holder = caller->method_holder();
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    int bci = vfst.bci();
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    Bytecode_invoke bytecode(caller, bci);
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    int index = bytecode.index();
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    // Make sure it's resolved first
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    CallInfo callInfo;
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    constantPoolHandle cp(holder->constants());
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    ConstantPoolCacheEntry* cp_cache_entry = cp->cache()->entry_at(cp->decode_cpcache_index(index, true));
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    Bytecodes::Code invoke_code = bytecode.invoke_code();
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    if (!cp_cache_entry->is_resolved(invoke_code)) {
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        LinkResolver::resolve_invoke(callInfo, Handle(), cp, index, invoke_code, CHECK);
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        if (bytecode.is_invokedynamic()) {
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            cp_cache_entry->set_dynamic_call(cp, callInfo);
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        } else {
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            cp_cache_entry->set_method_handle(cp, callInfo);
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        }
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        vmassert(cp_cache_entry->is_resolved(invoke_code), "sanity");
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    }
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    Handle appendix(THREAD, cp_cache_entry->appendix_if_resolved(cp));
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    Klass *appendix_klass = appendix.is_null() ? NULL : appendix->klass();
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    methodHandle adapter_method(cp_cache_entry->f1_as_method());
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    InstanceKlass *adapter_klass = adapter_method->method_holder();
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    if (appendix_klass != NULL && appendix_klass->is_instance_klass()) {
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        vmassert(InstanceKlass::cast(appendix_klass)->is_initialized(), "sanity");
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    }
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    if (!adapter_klass->is_initialized()) {
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        // Force initialization of adapter class
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        adapter_klass->initialize(CHECK);
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        // Double-check that it was really initialized,
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        // because we could be doing a recursive call
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        // from inside <clinit>.
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    }
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    int cpi = cp_cache_entry->constant_pool_index();
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    if (!AOTLoader::reconcile_dynamic_invoke(holder, cpi, adapter_method(),
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      appendix_klass)) {
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      return;
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    }
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    *appendix_result = appendix();
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    thread->set_vm_result(appendix());
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  }
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  JRT_BLOCK_END
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JRT_END
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JRT_BLOCK_ENTRY(MethodCounters*, CompilerRuntime::resolve_method_by_symbol_and_load_counters(JavaThread *thread, MethodCounters** counters_result, Klass* klass, const char* data))
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  MethodCounters* c = *counters_result; // Is it resolved already?
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  JRT_BLOCK
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     if (c == NULL) { // Do resolution
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       // Get method name and its length
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       int method_name_len = Bytes::get_Java_u2((address)data);
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       data += sizeof(u2);
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       const char* method_name = data;
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       data += method_name_len;
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       // Get signature and its length
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       int signature_name_len = Bytes::get_Java_u2((address)data);
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       data += sizeof(u2);
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       const char* signature_name = data;
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       assert(klass != NULL, "Klass parameter must not be null");
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       Method* m = resolve_method_helper(klass, method_name, method_name_len, signature_name, signature_name_len);
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       assert(m != NULL, "Method must resolve successfully");
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       // Create method counters immediately to avoid check at runtime.
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       c = m->get_method_counters(thread);
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       if (c == NULL) {
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         THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "Cannot allocate method counters");
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       }
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       *counters_result = c;
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     }
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  JRT_BLOCK_END
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  return c;
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JRT_END
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// Resolve and initialize Klass
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JRT_BLOCK_ENTRY(Klass*, CompilerRuntime::initialize_klass_by_symbol(JavaThread *thread, Klass** klass_result, const char* name))
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  Klass* k = NULL;
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  JRT_BLOCK
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    k = klass_result[0]; // Is it initialized already?
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    if (k == NULL) { // Do initialized
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      k = klass_result[1]; // Is it resolved already?
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      if (k == NULL) { // Do resolution
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        // First 2 bytes of name contains length (number of bytes).
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        int len = Bytes::get_Java_u2((address)name);
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        const char *cname = name + 2;
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        k = CompilerRuntime::resolve_klass_helper(thread,  cname, len, CHECK_NULL);
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        klass_result[1] = k; // Store resolved result
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      }
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      Klass* k0 = klass_result[0]; // Is it initialized already?
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      if (k0 == NULL && k != NULL && k->is_instance_klass()) {
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        // Force initialization of instance class
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        InstanceKlass::cast(k)->initialize(CHECK_NULL);
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        // Double-check that it was really initialized,
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        // because we could be doing a recursive call
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        // from inside <clinit>.
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        if (InstanceKlass::cast(k)->is_initialized()) {
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          klass_result[0] = k; // Store initialized result
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        }
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      }
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    }
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  JRT_BLOCK_END
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  assert(k != NULL, " Should be loaded!");
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  return k;
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JRT_END
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   247
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JRT_BLOCK_ENTRY(void, CompilerRuntime::invocation_event(JavaThread *thread, MethodCounters* counters))
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  if (!TieredCompilation) {
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    // Ignore the event if tiered is off
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    return;
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  }
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  JRT_BLOCK
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    methodHandle mh(THREAD, counters->method());
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    RegisterMap map(thread, false);
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    // Compute the enclosing method
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    frame fr = thread->last_frame().sender(&map);
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    CompiledMethod* cm = fr.cb()->as_compiled_method_or_null();
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    assert(cm != NULL && cm->is_compiled(), "Sanity check");
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    methodHandle emh(THREAD, cm->method());
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    assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
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    CompilationPolicy::policy()->event(emh, mh, InvocationEntryBci, InvocationEntryBci, CompLevel_aot, cm, thread);
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    assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
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  JRT_BLOCK_END
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JRT_END
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   269
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JRT_BLOCK_ENTRY(void, CompilerRuntime::backedge_event(JavaThread *thread, MethodCounters* counters, int branch_bci, int target_bci))
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  if (!TieredCompilation) {
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    // Ignore the event if tiered is off
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    return;
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  }
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  assert(branch_bci != InvocationEntryBci && target_bci != InvocationEntryBci, "Wrong bci");
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  assert(target_bci <= branch_bci, "Expected a back edge");
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  JRT_BLOCK
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    methodHandle mh(THREAD, counters->method());
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    RegisterMap map(thread, false);
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    // Compute the enclosing method
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    frame fr = thread->last_frame().sender(&map);
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    CompiledMethod* cm = fr.cb()->as_compiled_method_or_null();
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    assert(cm != NULL && cm->is_compiled(), "Sanity check");
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    methodHandle emh(THREAD, cm->method());
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    assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
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    nmethod* osr_nm = CompilationPolicy::policy()->event(emh, mh, branch_bci, target_bci, CompLevel_aot, cm, thread);
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    assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
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    if (osr_nm != NULL) {
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      Deoptimization::deoptimize_frame(thread, fr.id());
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    }
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  JRT_BLOCK_END
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   293
JRT_END