compilerRuntime.cpp revision 12408:777aaa19c4b1 
1/*
2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24#include "precompiled.hpp"
25#include "classfile/stringTable.hpp"
26#include "classfile/symbolTable.hpp"
27#include "jvmci/compilerRuntime.hpp"
28#include "runtime/compilationPolicy.hpp"
29#include "runtime/deoptimization.hpp"
30#include "runtime/interfaceSupport.hpp"
31
32// Resolve and allocate String
33JRT_BLOCK_ENTRY(void, CompilerRuntime::resolve_string_by_symbol(JavaThread *thread, void* string_result, const char* name))
34  JRT_BLOCK
35    oop str = *(oop*)string_result; // Is it resolved already?
36    if (str == NULL) { // Do resolution
37      // First 2 bytes of name contains length (number of bytes).
38      int len = build_u2_from((address)name);
39      name += 2;
40      TempNewSymbol sym = SymbolTable::new_symbol(name, len, CHECK);
41      str = StringTable::intern(sym, CHECK);
42      assert(java_lang_String::is_instance(str), "must be string");
43      *(oop*)string_result = str; // Store result
44    }
45    assert(str != NULL, "Should be allocated!");
46    thread->set_vm_result(str);
47  JRT_BLOCK_END
48JRT_END
49
50
51
52Klass* CompilerRuntime::resolve_klass_helper(JavaThread *thread, const char* name, int len, TRAPS) {
53  ResourceMark rm(THREAD);
54  // last java frame on stack (which includes native call frames)
55  RegisterMap cbl_map(thread, false);
56  // Skip stub
57  frame caller_frame = thread->last_frame().sender(&cbl_map);
58  CodeBlob* caller_cb = caller_frame.cb();
59  guarantee(caller_cb != NULL && caller_cb->is_compiled(), "must be called from compiled method");
60  CompiledMethod* caller_nm = caller_cb->as_compiled_method_or_null();
61  methodHandle caller(THREAD, caller_nm->method());
62
63  // Use class loader of aot method.
64  Handle loader(THREAD, caller->method_holder()->class_loader());
65  Handle protection_domain(THREAD, caller->method_holder()->protection_domain());
66
67  // Ignore wrapping L and ;
68  if (name[0] == 'L') {
69    assert(len > 2, "small name %s", name);
70    name++;
71    len -= 2;
72  }
73  TempNewSymbol sym = SymbolTable::new_symbol(name, len, CHECK_NULL);
74  if (sym == NULL) {
75    return NULL;
76  }
77  Klass* k = SystemDictionary::resolve_or_fail(sym, loader, protection_domain, true, CHECK_NULL);
78
79  return k;
80}
81
82// Resolve Klass
83JRT_BLOCK_ENTRY(Klass*, CompilerRuntime::resolve_klass_by_symbol(JavaThread *thread, Klass** klass_result, const char* name))
84  Klass* k = NULL;
85  JRT_BLOCK
86    k = *klass_result; // Is it resolved already?
87    if (k == NULL) { // Do resolution
88      // First 2 bytes of name contains length (number of bytes).
89      int len = build_u2_from((address)name);
90      name += 2;
91      k = CompilerRuntime::resolve_klass_helper(thread, name, len, CHECK_NULL);
92      *klass_result = k; // Store result
93    }
94  JRT_BLOCK_END
95  assert(k != NULL, " Should be loaded!");
96  return k;
97JRT_END
98
99
100Method* CompilerRuntime::resolve_method_helper(Klass* klass, const char* method_name, int method_name_len,
101                                                               const char* signature_name, int signature_name_len) {
102  Method* m = NULL;
103  TempNewSymbol name_symbol = SymbolTable::probe(method_name, method_name_len);
104  TempNewSymbol signature_symbol = SymbolTable::probe(signature_name, signature_name_len);
105  if (name_symbol != NULL && signature_symbol != NULL) {
106    if (name_symbol == vmSymbols::object_initializer_name() ||
107        name_symbol == vmSymbols::class_initializer_name()) {
108      // Never search superclasses for constructors
109      if (klass->is_instance_klass()) {
110        m = InstanceKlass::cast(klass)->find_method(name_symbol, signature_symbol);
111      }
112    } else {
113      m = klass->lookup_method(name_symbol, signature_symbol);
114      if (m == NULL && klass->is_instance_klass()) {
115        m = InstanceKlass::cast(klass)->lookup_method_in_ordered_interfaces(name_symbol, signature_symbol);
116      }
117    }
118  }
119  return m;
120}
121
122JRT_BLOCK_ENTRY(MethodCounters*, CompilerRuntime::resolve_method_by_symbol_and_load_counters(JavaThread *thread, MethodCounters** counters_result, Klass* klass, const char* data))
123  MethodCounters* c = *counters_result; // Is it resolved already?
124  JRT_BLOCK
125     if (c == NULL) { // Do resolution
126       // Get method name and its length
127       int method_name_len = build_u2_from((address)data);
128       data += sizeof(u2);
129       const char* method_name = data;
130       data += method_name_len;
131
132       // Get signature and its length
133       int signature_name_len = build_u2_from((address)data);
134       data += sizeof(u2);
135       const char* signature_name = data;
136
137       assert(klass != NULL, "Klass parameter must not be null");
138       Method* m = resolve_method_helper(klass, method_name, method_name_len, signature_name, signature_name_len);
139       assert(m != NULL, "Method must resolve successfully");
140
141       // Create method counters immediately to avoid check at runtime.
142       c = m->get_method_counters(thread);
143       if (c == NULL) {
144         THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "Cannot allocate method counters");
145       }
146
147       *counters_result = c;
148     }
149  JRT_BLOCK_END
150  return c;
151JRT_END
152
153// Resolve and initialize Klass
154JRT_BLOCK_ENTRY(Klass*, CompilerRuntime::initialize_klass_by_symbol(JavaThread *thread, Klass** klass_result, const char* name))
155  Klass* k = NULL;
156  JRT_BLOCK
157    k = klass_result[0]; // Is it initialized already?
158    if (k == NULL) { // Do initialized
159      k = klass_result[1]; // Is it resolved already?
160      if (k == NULL) { // Do resolution
161        // First 2 bytes of name contains length (number of bytes).
162        int len = build_u2_from((address)name);
163        const char *cname = name + 2;
164        k = CompilerRuntime::resolve_klass_helper(thread,  cname, len, CHECK_NULL);
165        klass_result[1] = k; // Store resolved result
166      }
167      Klass* k0 = klass_result[0]; // Is it initialized already?
168      if (k0 == NULL && k != NULL && k->is_instance_klass()) {
169        // Force initialization of instance class
170        InstanceKlass::cast(k)->initialize(CHECK_NULL);
171        // Double-check that it was really initialized,
172        // because we could be doing a recursive call
173        // from inside <clinit>.
174        if (InstanceKlass::cast(k)->is_initialized()) {
175          klass_result[0] = k; // Store initialized result
176        }
177      }
178    }
179  JRT_BLOCK_END
180  assert(k != NULL, " Should be loaded!");
181  return k;
182JRT_END
183
184
185JRT_BLOCK_ENTRY(void, CompilerRuntime::invocation_event(JavaThread *thread, MethodCounters* counters))
186  if (!TieredCompilation) {
187    // Ignore the event if tiered is off
188    return;
189  }
190  JRT_BLOCK
191    methodHandle mh(THREAD, counters->method());
192    RegisterMap map(thread, false);
193
194    // Compute the enclosing method
195    frame fr = thread->last_frame().sender(&map);
196    CompiledMethod* cm = fr.cb()->as_compiled_method_or_null();
197    assert(cm != NULL && cm->is_compiled(), "Sanity check");
198    methodHandle emh(THREAD, cm->method());
199
200    assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
201    CompilationPolicy::policy()->event(emh, mh, InvocationEntryBci, InvocationEntryBci, CompLevel_aot, cm, thread);
202    assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
203  JRT_BLOCK_END
204JRT_END
205
206JRT_BLOCK_ENTRY(void, CompilerRuntime::backedge_event(JavaThread *thread, MethodCounters* counters, int branch_bci, int target_bci))
207  if (!TieredCompilation) {
208    // Ignore the event if tiered is off
209    return;
210  }
211  assert(branch_bci != InvocationEntryBci && target_bci != InvocationEntryBci, "Wrong bci");
212  assert(target_bci <= branch_bci, "Expected a back edge");
213  JRT_BLOCK
214    methodHandle mh(THREAD, counters->method());
215    RegisterMap map(thread, false);
216
217    // Compute the enclosing method
218    frame fr = thread->last_frame().sender(&map);
219    CompiledMethod* cm = fr.cb()->as_compiled_method_or_null();
220    assert(cm != NULL && cm->is_compiled(), "Sanity check");
221    methodHandle emh(THREAD, cm->method());
222    assert(!HAS_PENDING_EXCEPTION, "Should not have any exceptions pending");
223    nmethod* osr_nm = CompilationPolicy::policy()->event(emh, mh, branch_bci, target_bci, CompLevel_aot, cm, thread);
224    assert(!HAS_PENDING_EXCEPTION, "Event handler should not throw any exceptions");
225    if (osr_nm != NULL) {
226      Deoptimization::deoptimize_frame(thread, fr.id());
227    }
228  JRT_BLOCK_END
229JRT_END
230