jvmciCodeInstaller.cpp revision 13249:a2753984d2c1 
1/*
2 * Copyright (c) 2011, 2017, 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 "asm/register.hpp"
26#include "classfile/vmSymbols.hpp"
27#include "code/compiledIC.hpp"
28#include "code/vmreg.inline.hpp"
29#include "compiler/compileBroker.hpp"
30#include "compiler/disassembler.hpp"
31#include "jvmci/jvmciEnv.hpp"
32#include "jvmci/jvmciCompiler.hpp"
33#include "jvmci/jvmciCodeInstaller.hpp"
34#include "jvmci/jvmciJavaClasses.hpp"
35#include "jvmci/jvmciCompilerToVM.hpp"
36#include "jvmci/jvmciRuntime.hpp"
37#include "oops/oop.inline.hpp"
38#include "oops/objArrayOop.inline.hpp"
39#include "runtime/javaCalls.hpp"
40#include "utilities/align.hpp"
41
42// frequently used constants
43// Allocate them with new so they are never destroyed (otherwise, a
44// forced exit could destroy these objects while they are still in
45// use).
46ConstantOopWriteValue* CodeInstaller::_oop_null_scope_value = new (ResourceObj::C_HEAP, mtCompiler) ConstantOopWriteValue(NULL);
47ConstantIntValue*      CodeInstaller::_int_m1_scope_value = new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(-1);
48ConstantIntValue*      CodeInstaller::_int_0_scope_value =  new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(0);
49ConstantIntValue*      CodeInstaller::_int_1_scope_value =  new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(1);
50ConstantIntValue*      CodeInstaller::_int_2_scope_value =  new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(2);
51LocationValue*         CodeInstaller::_illegal_value = new (ResourceObj::C_HEAP, mtCompiler) LocationValue(Location());
52
53Method* getMethodFromHotSpotMethod(oop hotspot_method) {
54  assert(hotspot_method != NULL && hotspot_method->is_a(HotSpotResolvedJavaMethodImpl::klass()), "sanity");
55  return CompilerToVM::asMethod(hotspot_method);
56}
57
58VMReg getVMRegFromLocation(Handle location, int total_frame_size, TRAPS) {
59  if (location.is_null()) {
60    THROW_NULL(vmSymbols::java_lang_NullPointerException());
61  }
62
63  Handle reg(THREAD, code_Location::reg(location));
64  jint offset = code_Location::offset(location);
65
66  if (reg.not_null()) {
67    // register
68    jint number = code_Register::number(reg);
69    VMReg vmReg = CodeInstaller::get_hotspot_reg(number, CHECK_NULL);
70    if (offset % 4 == 0) {
71      return vmReg->next(offset / 4);
72    } else {
73      JVMCI_ERROR_NULL("unaligned subregister offset %d in oop map", offset);
74    }
75  } else {
76    // stack slot
77    if (offset % 4 == 0) {
78      VMReg vmReg = VMRegImpl::stack2reg(offset / 4);
79      if (!OopMapValue::legal_vm_reg_name(vmReg)) {
80        // This restriction only applies to VMRegs that are used in OopMap but
81        // since that's the only use of VMRegs it's simplest to put this test
82        // here.  This test should also be equivalent legal_vm_reg_name but JVMCI
83        // clients can use max_oop_map_stack_stack_offset to detect this problem
84        // directly.  The asserts just ensure that the tests are in agreement.
85        assert(offset > CompilerToVM::Data::max_oop_map_stack_offset(), "illegal VMReg");
86        JVMCI_ERROR_NULL("stack offset %d is too large to be encoded in OopMap (max %d)",
87                         offset, CompilerToVM::Data::max_oop_map_stack_offset());
88      }
89      assert(OopMapValue::legal_vm_reg_name(vmReg), "illegal VMReg");
90      return vmReg;
91    } else {
92      JVMCI_ERROR_NULL("unaligned stack offset %d in oop map", offset);
93    }
94  }
95}
96
97// creates a HotSpot oop map out of the byte arrays provided by DebugInfo
98OopMap* CodeInstaller::create_oop_map(Handle debug_info, TRAPS) {
99  Handle reference_map(THREAD, DebugInfo::referenceMap(debug_info));
100  if (reference_map.is_null()) {
101    THROW_NULL(vmSymbols::java_lang_NullPointerException());
102  }
103  if (!reference_map->is_a(HotSpotReferenceMap::klass())) {
104    JVMCI_ERROR_NULL("unknown reference map: %s", reference_map->klass()->signature_name());
105  }
106  if (HotSpotReferenceMap::maxRegisterSize(reference_map) > 16) {
107    _has_wide_vector = true;
108  }
109  OopMap* map = new OopMap(_total_frame_size, _parameter_count);
110  objArrayHandle objects(THREAD, HotSpotReferenceMap::objects(reference_map));
111  objArrayHandle derivedBase(THREAD, HotSpotReferenceMap::derivedBase(reference_map));
112  typeArrayHandle sizeInBytes(THREAD, HotSpotReferenceMap::sizeInBytes(reference_map));
113  if (objects.is_null() || derivedBase.is_null() || sizeInBytes.is_null()) {
114    THROW_NULL(vmSymbols::java_lang_NullPointerException());
115  }
116  if (objects->length() != derivedBase->length() || objects->length() != sizeInBytes->length()) {
117    JVMCI_ERROR_NULL("arrays in reference map have different sizes: %d %d %d", objects->length(), derivedBase->length(), sizeInBytes->length());
118  }
119  for (int i = 0; i < objects->length(); i++) {
120    Handle location(THREAD, objects->obj_at(i));
121    Handle baseLocation(THREAD, derivedBase->obj_at(i));
122    int bytes = sizeInBytes->int_at(i);
123
124    VMReg vmReg = getVMRegFromLocation(location, _total_frame_size, CHECK_NULL);
125    if (baseLocation.not_null()) {
126      // derived oop
127#ifdef _LP64
128      if (bytes == 8) {
129#else
130      if (bytes == 4) {
131#endif
132        VMReg baseReg = getVMRegFromLocation(baseLocation, _total_frame_size, CHECK_NULL);
133        map->set_derived_oop(vmReg, baseReg);
134      } else {
135        JVMCI_ERROR_NULL("invalid derived oop size in ReferenceMap: %d", bytes);
136      }
137#ifdef _LP64
138    } else if (bytes == 8) {
139      // wide oop
140      map->set_oop(vmReg);
141    } else if (bytes == 4) {
142      // narrow oop
143      map->set_narrowoop(vmReg);
144#else
145    } else if (bytes == 4) {
146      map->set_oop(vmReg);
147#endif
148    } else {
149      JVMCI_ERROR_NULL("invalid oop size in ReferenceMap: %d", bytes);
150    }
151  }
152
153  Handle callee_save_info(THREAD, (oop) DebugInfo::calleeSaveInfo(debug_info));
154  if (callee_save_info.not_null()) {
155    objArrayHandle registers(THREAD, RegisterSaveLayout::registers(callee_save_info));
156    typeArrayHandle slots(THREAD, RegisterSaveLayout::slots(callee_save_info));
157    for (jint i = 0; i < slots->length(); i++) {
158      Handle jvmci_reg (THREAD, registers->obj_at(i));
159      jint jvmci_reg_number = code_Register::number(jvmci_reg);
160      VMReg hotspot_reg = CodeInstaller::get_hotspot_reg(jvmci_reg_number, CHECK_NULL);
161      // HotSpot stack slots are 4 bytes
162      jint jvmci_slot = slots->int_at(i);
163      jint hotspot_slot = jvmci_slot * VMRegImpl::slots_per_word;
164      VMReg hotspot_slot_as_reg = VMRegImpl::stack2reg(hotspot_slot);
165      map->set_callee_saved(hotspot_slot_as_reg, hotspot_reg);
166#ifdef _LP64
167      // (copied from generate_oop_map() in c1_Runtime1_x86.cpp)
168      VMReg hotspot_slot_hi_as_reg = VMRegImpl::stack2reg(hotspot_slot + 1);
169      map->set_callee_saved(hotspot_slot_hi_as_reg, hotspot_reg->next());
170#endif
171    }
172  }
173  return map;
174}
175
176AOTOopRecorder::AOTOopRecorder(Arena* arena, bool deduplicate) : OopRecorder(arena, deduplicate) {
177  _meta_strings = new GrowableArray<const char*>();
178}
179
180int AOTOopRecorder::nr_meta_strings() const {
181  return _meta_strings->length();
182}
183
184const char* AOTOopRecorder::meta_element(int pos) const {
185  return _meta_strings->at(pos);
186}
187
188int AOTOopRecorder::find_index(Metadata* h) {
189  int index =  this->OopRecorder::find_index(h);
190
191  Klass* klass = NULL;
192  if (h->is_klass()) {
193    klass = (Klass*) h;
194    record_meta_string(klass->signature_name(), index);
195  } else if (h->is_method()) {
196    Method* method = (Method*) h;
197    // Need klass->signature_name() in method name
198    klass = method->method_holder();
199    const char* klass_name = klass->signature_name();
200    int klass_name_len  = (int)strlen(klass_name);
201    Symbol* method_name = method->name();
202    Symbol* signature   = method->signature();
203    int method_name_len = method_name->utf8_length();
204    int method_sign_len = signature->utf8_length();
205    int len             = klass_name_len + 1 + method_name_len + method_sign_len;
206    char* dest          = NEW_RESOURCE_ARRAY(char, len + 1);
207    strcpy(dest, klass_name);
208    dest[klass_name_len] = '.';
209    strcpy(&dest[klass_name_len + 1], method_name->as_C_string());
210    strcpy(&dest[klass_name_len + 1 + method_name_len], signature->as_C_string());
211    dest[len] = 0;
212    record_meta_string(dest, index);
213  }
214
215  return index;
216}
217
218int AOTOopRecorder::find_index(jobject h) {
219  if (h == NULL) {
220    return 0;
221  }
222  oop javaMirror = JNIHandles::resolve(h);
223  Klass* klass = java_lang_Class::as_Klass(javaMirror);
224  return find_index(klass);
225}
226
227void AOTOopRecorder::record_meta_string(const char* name, int index) {
228  assert(index > 0, "must be 1..n");
229  index -= 1; // reduce by one to convert to array index
230
231  if (index < _meta_strings->length()) {
232    assert(strcmp(name, _meta_strings->at(index)) == 0, "must match");
233  } else {
234    assert(index == _meta_strings->length(), "must be last");
235    _meta_strings->append(name);
236  }
237}
238
239void* CodeInstaller::record_metadata_reference(CodeSection* section, address dest, Handle constant, TRAPS) {
240  /*
241   * This method needs to return a raw (untyped) pointer, since the value of a pointer to the base
242   * class is in general not equal to the pointer of the subclass. When patching metaspace pointers,
243   * the compiler expects a direct pointer to the subclass (Klass* or Method*), not a pointer to the
244   * base class (Metadata* or MetaspaceObj*).
245   */
246  oop obj = HotSpotMetaspaceConstantImpl::metaspaceObject(constant);
247  if (obj->is_a(HotSpotResolvedObjectTypeImpl::klass())) {
248    Klass* klass = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(obj));
249    assert(!HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected compressed klass pointer %s @ " INTPTR_FORMAT, klass->name()->as_C_string(), p2i(klass));
250    int index = _oop_recorder->find_index(klass);
251    section->relocate(dest, metadata_Relocation::spec(index));
252    TRACE_jvmci_3("metadata[%d of %d] = %s", index, _oop_recorder->metadata_count(), klass->name()->as_C_string());
253    return klass;
254  } else if (obj->is_a(HotSpotResolvedJavaMethodImpl::klass())) {
255    Method* method = (Method*) (address) HotSpotResolvedJavaMethodImpl::metaspaceMethod(obj);
256    assert(!HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected compressed method pointer %s @ " INTPTR_FORMAT, method->name()->as_C_string(), p2i(method));
257    int index = _oop_recorder->find_index(method);
258    section->relocate(dest, metadata_Relocation::spec(index));
259    TRACE_jvmci_3("metadata[%d of %d] = %s", index, _oop_recorder->metadata_count(), method->name()->as_C_string());
260    return method;
261  } else {
262    JVMCI_ERROR_NULL("unexpected metadata reference for constant of type %s", obj->klass()->signature_name());
263  }
264}
265
266#ifdef _LP64
267narrowKlass CodeInstaller::record_narrow_metadata_reference(CodeSection* section, address dest, Handle constant, TRAPS) {
268  oop obj = HotSpotMetaspaceConstantImpl::metaspaceObject(constant);
269  assert(HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected uncompressed pointer");
270
271  if (!obj->is_a(HotSpotResolvedObjectTypeImpl::klass())) {
272    JVMCI_ERROR_0("unexpected compressed pointer of type %s", obj->klass()->signature_name());
273  }
274
275  Klass* klass = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(obj));
276  int index = _oop_recorder->find_index(klass);
277  section->relocate(dest, metadata_Relocation::spec(index));
278  TRACE_jvmci_3("narrowKlass[%d of %d] = %s", index, _oop_recorder->metadata_count(), klass->name()->as_C_string());
279  return Klass::encode_klass(klass);
280}
281#endif
282
283Location::Type CodeInstaller::get_oop_type(Thread* thread, Handle value) {
284  Handle valueKind(thread, Value::valueKind(value));
285  Handle platformKind(thread, ValueKind::platformKind(valueKind));
286
287  if (platformKind == word_kind()) {
288    return Location::oop;
289  } else {
290    return Location::narrowoop;
291  }
292}
293
294ScopeValue* CodeInstaller::get_scope_value(Handle value, BasicType type, GrowableArray<ScopeValue*>* objects, ScopeValue* &second, TRAPS) {
295  second = NULL;
296  if (value.is_null()) {
297    THROW_NULL(vmSymbols::java_lang_NullPointerException());
298  } else if (value == Value::ILLEGAL()) {
299    if (type != T_ILLEGAL) {
300      JVMCI_ERROR_NULL("unexpected illegal value, expected %s", basictype_to_str(type));
301    }
302    return _illegal_value;
303  } else if (value->is_a(RegisterValue::klass())) {
304    Handle reg(THREAD, RegisterValue::reg(value));
305    jint number = code_Register::number(reg);
306    VMReg hotspotRegister = get_hotspot_reg(number, CHECK_NULL);
307    if (is_general_purpose_reg(hotspotRegister)) {
308      Location::Type locationType;
309      if (type == T_OBJECT) {
310        locationType = get_oop_type(THREAD, value);
311      } else if (type == T_LONG) {
312        locationType = Location::lng;
313      } else if (type == T_INT || type == T_FLOAT || type == T_SHORT || type == T_CHAR || type == T_BYTE || type == T_BOOLEAN) {
314        locationType = Location::int_in_long;
315      } else {
316        JVMCI_ERROR_NULL("unexpected type %s in cpu register", basictype_to_str(type));
317      }
318      ScopeValue* value = new LocationValue(Location::new_reg_loc(locationType, hotspotRegister));
319      if (type == T_LONG) {
320        second = value;
321      }
322      return value;
323    } else {
324      Location::Type locationType;
325      if (type == T_FLOAT) {
326        // this seems weird, but the same value is used in c1_LinearScan
327        locationType = Location::normal;
328      } else if (type == T_DOUBLE) {
329        locationType = Location::dbl;
330      } else {
331        JVMCI_ERROR_NULL("unexpected type %s in floating point register", basictype_to_str(type));
332      }
333      ScopeValue* value = new LocationValue(Location::new_reg_loc(locationType, hotspotRegister));
334      if (type == T_DOUBLE) {
335        second = value;
336      }
337      return value;
338    }
339  } else if (value->is_a(StackSlot::klass())) {
340    jint offset = StackSlot::offset(value);
341    if (StackSlot::addFrameSize(value)) {
342      offset += _total_frame_size;
343    }
344
345    Location::Type locationType;
346    if (type == T_OBJECT) {
347      locationType = get_oop_type(THREAD, value);
348    } else if (type == T_LONG) {
349      locationType = Location::lng;
350    } else if (type == T_DOUBLE) {
351      locationType = Location::dbl;
352    } else if (type == T_INT || type == T_FLOAT || type == T_SHORT || type == T_CHAR || type == T_BYTE || type == T_BOOLEAN) {
353      locationType = Location::normal;
354    } else {
355      JVMCI_ERROR_NULL("unexpected type %s in stack slot", basictype_to_str(type));
356    }
357    ScopeValue* value = new LocationValue(Location::new_stk_loc(locationType, offset));
358    if (type == T_DOUBLE || type == T_LONG) {
359      second = value;
360    }
361    return value;
362  } else if (value->is_a(JavaConstant::klass())) {
363    if (value->is_a(PrimitiveConstant::klass())) {
364      if (value->is_a(RawConstant::klass())) {
365        jlong prim = PrimitiveConstant::primitive(value);
366        return new ConstantLongValue(prim);
367      } else {
368        Handle primitive_constant_kind(THREAD, PrimitiveConstant::kind(value));
369        BasicType constantType = JVMCIRuntime::kindToBasicType(primitive_constant_kind, CHECK_NULL);
370        if (type != constantType) {
371          JVMCI_ERROR_NULL("primitive constant type doesn't match, expected %s but got %s", basictype_to_str(type), basictype_to_str(constantType));
372        }
373        if (type == T_INT || type == T_FLOAT) {
374          jint prim = (jint)PrimitiveConstant::primitive(value);
375          switch (prim) {
376            case -1: return _int_m1_scope_value;
377            case  0: return _int_0_scope_value;
378            case  1: return _int_1_scope_value;
379            case  2: return _int_2_scope_value;
380            default: return new ConstantIntValue(prim);
381          }
382        } else if (type == T_LONG || type == T_DOUBLE) {
383          jlong prim = PrimitiveConstant::primitive(value);
384          second = _int_1_scope_value;
385          return new ConstantLongValue(prim);
386        } else {
387          JVMCI_ERROR_NULL("unexpected primitive constant type %s", basictype_to_str(type));
388        }
389      }
390    } else if (value->is_a(NullConstant::klass()) || value->is_a(HotSpotCompressedNullConstant::klass())) {
391      if (type == T_OBJECT) {
392        return _oop_null_scope_value;
393      } else {
394        JVMCI_ERROR_NULL("unexpected null constant, expected %s", basictype_to_str(type));
395      }
396    } else if (value->is_a(HotSpotObjectConstantImpl::klass())) {
397      if (type == T_OBJECT) {
398        oop obj = HotSpotObjectConstantImpl::object(value);
399        if (obj == NULL) {
400          JVMCI_ERROR_NULL("null value must be in NullConstant");
401        }
402        return new ConstantOopWriteValue(JNIHandles::make_local(obj));
403      } else {
404        JVMCI_ERROR_NULL("unexpected object constant, expected %s", basictype_to_str(type));
405      }
406    }
407  } else if (value->is_a(VirtualObject::klass())) {
408    if (type == T_OBJECT) {
409      int id = VirtualObject::id(value);
410      if (0 <= id && id < objects->length()) {
411        ScopeValue* object = objects->at(id);
412        if (object != NULL) {
413          return object;
414        }
415      }
416      JVMCI_ERROR_NULL("unknown virtual object id %d", id);
417    } else {
418      JVMCI_ERROR_NULL("unexpected virtual object, expected %s", basictype_to_str(type));
419    }
420  }
421
422  JVMCI_ERROR_NULL("unexpected value in scope: %s", value->klass()->signature_name())
423}
424
425void CodeInstaller::record_object_value(ObjectValue* sv, Handle value, GrowableArray<ScopeValue*>* objects, TRAPS) {
426  // Might want a HandleMark here.
427  Handle type(THREAD, VirtualObject::type(value));
428  int id = VirtualObject::id(value);
429  oop javaMirror = HotSpotResolvedObjectTypeImpl::javaClass(type);
430  Klass* klass = java_lang_Class::as_Klass(javaMirror);
431  bool isLongArray = klass == Universe::longArrayKlassObj();
432
433  objArrayHandle values(THREAD, VirtualObject::values(value));
434  objArrayHandle slotKinds(THREAD, VirtualObject::slotKinds(value));
435  for (jint i = 0; i < values->length(); i++) {
436    HandleMark hm(THREAD);
437    ScopeValue* cur_second = NULL;
438    Handle object(THREAD, values->obj_at(i));
439    Handle slot_kind (THREAD, slotKinds->obj_at(i));
440    BasicType type = JVMCIRuntime::kindToBasicType(slot_kind, CHECK);
441    ScopeValue* value = get_scope_value(object, type, objects, cur_second, CHECK);
442
443    if (isLongArray && cur_second == NULL) {
444      // we're trying to put ints into a long array... this isn't really valid, but it's used for some optimizations.
445      // add an int 0 constant
446      cur_second = _int_0_scope_value;
447    }
448
449    if (cur_second != NULL) {
450      sv->field_values()->append(cur_second);
451    }
452    assert(value != NULL, "missing value");
453    sv->field_values()->append(value);
454  }
455}
456
457MonitorValue* CodeInstaller::get_monitor_value(Handle value, GrowableArray<ScopeValue*>* objects, TRAPS) {
458  if (value.is_null()) {
459    THROW_NULL(vmSymbols::java_lang_NullPointerException());
460  }
461  if (!value->is_a(StackLockValue::klass())) {
462    JVMCI_ERROR_NULL("Monitors must be of type StackLockValue, got %s", value->klass()->signature_name());
463  }
464
465  ScopeValue* second = NULL;
466  Handle stack_lock_owner(THREAD, StackLockValue::owner(value));
467  ScopeValue* owner_value = get_scope_value(stack_lock_owner, T_OBJECT, objects, second, CHECK_NULL);
468  assert(second == NULL, "monitor cannot occupy two stack slots");
469
470  Handle stack_lock_slot(THREAD, StackLockValue::slot(value));
471  ScopeValue* lock_data_value = get_scope_value(stack_lock_slot, T_LONG, objects, second, CHECK_NULL);
472  assert(second == lock_data_value, "monitor is LONG value that occupies two stack slots");
473  assert(lock_data_value->is_location(), "invalid monitor location");
474  Location lock_data_loc = ((LocationValue*)lock_data_value)->location();
475
476  bool eliminated = false;
477  if (StackLockValue::eliminated(value)) {
478    eliminated = true;
479  }
480
481  return new MonitorValue(owner_value, lock_data_loc, eliminated);
482}
483
484void CodeInstaller::initialize_dependencies(oop compiled_code, OopRecorder* recorder, TRAPS) {
485  JavaThread* thread = JavaThread::current();
486  assert(THREAD == thread, "");
487  CompilerThread* compilerThread = thread->is_Compiler_thread() ? thread->as_CompilerThread() : NULL;
488  _oop_recorder = recorder;
489  _dependencies = new Dependencies(&_arena, _oop_recorder, compilerThread != NULL ? compilerThread->log() : NULL);
490  objArrayHandle assumptions(THREAD, HotSpotCompiledCode::assumptions(compiled_code));
491  if (!assumptions.is_null()) {
492    int length = assumptions->length();
493    for (int i = 0; i < length; ++i) {
494      Handle assumption(THREAD, assumptions->obj_at(i));
495      if (!assumption.is_null()) {
496        if (assumption->klass() == Assumptions_NoFinalizableSubclass::klass()) {
497          assumption_NoFinalizableSubclass(THREAD, assumption);
498        } else if (assumption->klass() == Assumptions_ConcreteSubtype::klass()) {
499          assumption_ConcreteSubtype(THREAD, assumption);
500        } else if (assumption->klass() == Assumptions_LeafType::klass()) {
501          assumption_LeafType(THREAD, assumption);
502        } else if (assumption->klass() == Assumptions_ConcreteMethod::klass()) {
503          assumption_ConcreteMethod(THREAD, assumption);
504        } else if (assumption->klass() == Assumptions_CallSiteTargetValue::klass()) {
505          assumption_CallSiteTargetValue(THREAD, assumption);
506        } else {
507          JVMCI_ERROR("unexpected Assumption subclass %s", assumption->klass()->signature_name());
508        }
509      }
510    }
511  }
512  if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
513    objArrayHandle methods(THREAD, HotSpotCompiledCode::methods(compiled_code));
514    if (!methods.is_null()) {
515      int length = methods->length();
516      for (int i = 0; i < length; ++i) {
517        Handle method_handle(THREAD, methods->obj_at(i));
518        methodHandle method = getMethodFromHotSpotMethod(method_handle());
519        _dependencies->assert_evol_method(method());
520      }
521    }
522  }
523}
524
525RelocBuffer::~RelocBuffer() {
526  if (_buffer != NULL) {
527    FREE_C_HEAP_ARRAY(char, _buffer);
528  }
529}
530
531address RelocBuffer::begin() const {
532  if (_buffer != NULL) {
533    return (address) _buffer;
534  }
535  return (address) _static_buffer;
536}
537
538void RelocBuffer::set_size(size_t bytes) {
539  assert(bytes <= _size, "can't grow in size!");
540  _size = bytes;
541}
542
543void RelocBuffer::ensure_size(size_t bytes) {
544  assert(_buffer == NULL, "can only be used once");
545  assert(_size == 0, "can only be used once");
546  if (bytes >= RelocBuffer::stack_size) {
547    _buffer = NEW_C_HEAP_ARRAY(char, bytes, mtInternal);
548  }
549  _size = bytes;
550}
551
552JVMCIEnv::CodeInstallResult CodeInstaller::gather_metadata(Handle target, Handle compiled_code, CodeMetadata& metadata, TRAPS) {
553  CodeBuffer buffer("JVMCI Compiler CodeBuffer for Metadata");
554  jobject compiled_code_obj = JNIHandles::make_local(compiled_code());
555  AOTOopRecorder* recorder = new AOTOopRecorder(&_arena, true);
556  initialize_dependencies(JNIHandles::resolve(compiled_code_obj), recorder, CHECK_OK);
557
558  metadata.set_oop_recorder(recorder);
559
560  // Get instructions and constants CodeSections early because we need it.
561  _instructions = buffer.insts();
562  _constants = buffer.consts();
563
564  initialize_fields(target(), JNIHandles::resolve(compiled_code_obj), CHECK_OK);
565  JVMCIEnv::CodeInstallResult result = initialize_buffer(buffer, false, CHECK_OK);
566  if (result != JVMCIEnv::ok) {
567    return result;
568  }
569
570  _debug_recorder->pcs_size(); // create the sentinel record
571
572  assert(_debug_recorder->pcs_length() >= 2, "must be at least 2");
573
574  metadata.set_pc_desc(_debug_recorder->pcs(), _debug_recorder->pcs_length());
575  metadata.set_scopes(_debug_recorder->stream()->buffer(), _debug_recorder->data_size());
576  metadata.set_exception_table(&_exception_handler_table);
577
578  RelocBuffer* reloc_buffer = metadata.get_reloc_buffer();
579
580  reloc_buffer->ensure_size(buffer.total_relocation_size());
581  size_t size = (size_t) buffer.copy_relocations_to(reloc_buffer->begin(), (CodeBuffer::csize_t) reloc_buffer->size(), true);
582  reloc_buffer->set_size(size);
583  return JVMCIEnv::ok;
584}
585
586// constructor used to create a method
587JVMCIEnv::CodeInstallResult CodeInstaller::install(JVMCICompiler* compiler, Handle target, Handle compiled_code, CodeBlob*& cb, Handle installed_code, Handle speculation_log, TRAPS) {
588  CodeBuffer buffer("JVMCI Compiler CodeBuffer");
589  jobject compiled_code_obj = JNIHandles::make_local(compiled_code());
590  OopRecorder* recorder = new OopRecorder(&_arena, true);
591  initialize_dependencies(JNIHandles::resolve(compiled_code_obj), recorder, CHECK_OK);
592
593  // Get instructions and constants CodeSections early because we need it.
594  _instructions = buffer.insts();
595  _constants = buffer.consts();
596
597  initialize_fields(target(), JNIHandles::resolve(compiled_code_obj), CHECK_OK);
598  JVMCIEnv::CodeInstallResult result = initialize_buffer(buffer, true, CHECK_OK);
599  if (result != JVMCIEnv::ok) {
600    return result;
601  }
602
603  int stack_slots = _total_frame_size / HeapWordSize; // conversion to words
604
605  if (!compiled_code->is_a(HotSpotCompiledNmethod::klass())) {
606    oop stubName = HotSpotCompiledCode::name(compiled_code_obj);
607    char* name = strdup(java_lang_String::as_utf8_string(stubName));
608    cb = RuntimeStub::new_runtime_stub(name,
609                                       &buffer,
610                                       CodeOffsets::frame_never_safe,
611                                       stack_slots,
612                                       _debug_recorder->_oopmaps,
613                                       false);
614    result = JVMCIEnv::ok;
615  } else {
616    nmethod* nm = NULL;
617    methodHandle method = getMethodFromHotSpotMethod(HotSpotCompiledNmethod::method(compiled_code));
618    jint entry_bci = HotSpotCompiledNmethod::entryBCI(compiled_code);
619    jint id = HotSpotCompiledNmethod::id(compiled_code);
620    bool has_unsafe_access = HotSpotCompiledNmethod::hasUnsafeAccess(compiled_code) == JNI_TRUE;
621    JVMCIEnv* env = (JVMCIEnv*) (address) HotSpotCompiledNmethod::jvmciEnv(compiled_code);
622    if (id == -1) {
623      // Make sure a valid compile_id is associated with every compile
624      id = CompileBroker::assign_compile_id_unlocked(Thread::current(), method, entry_bci);
625    }
626    result = JVMCIEnv::register_method(method, nm, entry_bci, &_offsets, _orig_pc_offset, &buffer,
627                                       stack_slots, _debug_recorder->_oopmaps, &_exception_handler_table,
628                                       compiler, _debug_recorder, _dependencies, env, id,
629                                       has_unsafe_access, _has_wide_vector, installed_code, compiled_code, speculation_log);
630    cb = nm->as_codeblob_or_null();
631    if (nm != NULL && env == NULL) {
632      DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, compiler);
633      bool printnmethods = directive->PrintAssemblyOption || directive->PrintNMethodsOption;
634      if (!printnmethods && (PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers)) {
635        nm->print_nmethod(printnmethods);
636      }
637      DirectivesStack::release(directive);
638    }
639  }
640
641  if (cb != NULL) {
642    // Make sure the pre-calculated constants section size was correct.
643    guarantee((cb->code_begin() - cb->content_begin()) >= _constants_size, "%d < %d", (int)(cb->code_begin() - cb->content_begin()), _constants_size);
644  }
645  return result;
646}
647
648void CodeInstaller::initialize_fields(oop target, oop compiled_code, TRAPS) {
649  if (compiled_code->is_a(HotSpotCompiledNmethod::klass())) {
650    Handle hotspotJavaMethod(THREAD, HotSpotCompiledNmethod::method(compiled_code));
651    methodHandle method = getMethodFromHotSpotMethod(hotspotJavaMethod());
652    _parameter_count = method->size_of_parameters();
653    TRACE_jvmci_2("installing code for %s", method->name_and_sig_as_C_string());
654  } else {
655    // Must be a HotSpotCompiledRuntimeStub.
656    // Only used in OopMap constructor for non-product builds
657    _parameter_count = 0;
658  }
659  _sites_handle = JNIHandles::make_local(HotSpotCompiledCode::sites(compiled_code));
660
661  _code_handle = JNIHandles::make_local(HotSpotCompiledCode::targetCode(compiled_code));
662  _code_size = HotSpotCompiledCode::targetCodeSize(compiled_code);
663  _total_frame_size = HotSpotCompiledCode::totalFrameSize(compiled_code);
664
665  oop deoptRescueSlot = HotSpotCompiledCode::deoptRescueSlot(compiled_code);
666  if (deoptRescueSlot == NULL) {
667    _orig_pc_offset = -1;
668  } else {
669    _orig_pc_offset = StackSlot::offset(deoptRescueSlot);
670    if (StackSlot::addFrameSize(deoptRescueSlot)) {
671      _orig_pc_offset += _total_frame_size;
672    }
673    if (_orig_pc_offset < 0) {
674      JVMCI_ERROR("invalid deopt rescue slot: %d", _orig_pc_offset);
675    }
676  }
677
678  // Pre-calculate the constants section size.  This is required for PC-relative addressing.
679  _data_section_handle = JNIHandles::make_local(HotSpotCompiledCode::dataSection(compiled_code));
680  if ((_constants->alignment() % HotSpotCompiledCode::dataSectionAlignment(compiled_code)) != 0) {
681    JVMCI_ERROR("invalid data section alignment: %d", HotSpotCompiledCode::dataSectionAlignment(compiled_code));
682  }
683  _constants_size = data_section()->length();
684
685  _data_section_patches_handle = JNIHandles::make_local(HotSpotCompiledCode::dataSectionPatches(compiled_code));
686
687#ifndef PRODUCT
688  _comments_handle = JNIHandles::make_local(HotSpotCompiledCode::comments(compiled_code));
689#endif
690
691  _next_call_type = INVOKE_INVALID;
692
693  _has_wide_vector = false;
694
695  oop arch = TargetDescription::arch(target);
696  _word_kind_handle = JNIHandles::make_local(Architecture::wordKind(arch));
697}
698
699int CodeInstaller::estimate_stubs_size(TRAPS) {
700  // Estimate the number of static and aot call stubs that might be emitted.
701  int static_call_stubs = 0;
702  int aot_call_stubs = 0;
703  objArrayOop sites = this->sites();
704  for (int i = 0; i < sites->length(); i++) {
705    oop site = sites->obj_at(i);
706    if (site != NULL) {
707      if (site->is_a(site_Mark::klass())) {
708        oop id_obj = site_Mark::id(site);
709        if (id_obj != NULL) {
710          if (!java_lang_boxing_object::is_instance(id_obj, T_INT)) {
711            JVMCI_ERROR_0("expected Integer id, got %s", id_obj->klass()->signature_name());
712          }
713          jint id = id_obj->int_field(java_lang_boxing_object::value_offset_in_bytes(T_INT));
714          if (id == INVOKESTATIC || id == INVOKESPECIAL) {
715            static_call_stubs++;
716          }
717        }
718      }
719      if (UseAOT && site->is_a(site_Call::klass())) {
720        oop target = site_Call::target(site);
721        InstanceKlass* target_klass = InstanceKlass::cast(target->klass());
722        if (!target_klass->is_subclass_of(SystemDictionary::HotSpotForeignCallTarget_klass())) {
723          // Add far aot trampolines.
724          aot_call_stubs++;
725        }
726      }
727    }
728  }
729  int size = static_call_stubs * CompiledStaticCall::to_interp_stub_size();
730#if INCLUDE_AOT
731  size += aot_call_stubs * CompiledStaticCall::to_aot_stub_size();
732#endif
733  return size;
734}
735
736// perform data and call relocation on the CodeBuffer
737JVMCIEnv::CodeInstallResult CodeInstaller::initialize_buffer(CodeBuffer& buffer, bool check_size, TRAPS) {
738  HandleMark hm;
739  objArrayHandle sites(THREAD, this->sites());
740  int locs_buffer_size = sites->length() * (relocInfo::length_limit + sizeof(relocInfo));
741
742  // Allocate enough space in the stub section for the static call
743  // stubs.  Stubs have extra relocs but they are managed by the stub
744  // section itself so they don't need to be accounted for in the
745  // locs_buffer above.
746  int stubs_size = estimate_stubs_size(CHECK_OK);
747  int total_size = align_up(_code_size, buffer.insts()->alignment()) + align_up(_constants_size, buffer.consts()->alignment()) + align_up(stubs_size, buffer.stubs()->alignment());
748
749  if (check_size && total_size > JVMCINMethodSizeLimit) {
750    return JVMCIEnv::code_too_large;
751  }
752
753  buffer.initialize(total_size, locs_buffer_size);
754  if (buffer.blob() == NULL) {
755    return JVMCIEnv::cache_full;
756  }
757  buffer.initialize_stubs_size(stubs_size);
758  buffer.initialize_consts_size(_constants_size);
759
760  _debug_recorder = new DebugInformationRecorder(_oop_recorder);
761  _debug_recorder->set_oopmaps(new OopMapSet());
762
763  buffer.initialize_oop_recorder(_oop_recorder);
764
765  // copy the constant data into the newly created CodeBuffer
766  address end_data = _constants->start() + _constants_size;
767  memcpy(_constants->start(), data_section()->base(T_BYTE), _constants_size);
768  _constants->set_end(end_data);
769
770  // copy the code into the newly created CodeBuffer
771  address end_pc = _instructions->start() + _code_size;
772  guarantee(_instructions->allocates2(end_pc), "initialize should have reserved enough space for all the code");
773  memcpy(_instructions->start(), code()->base(T_BYTE), _code_size);
774  _instructions->set_end(end_pc);
775
776  for (int i = 0; i < data_section_patches()->length(); i++) {
777    HandleMark hm(THREAD);
778    Handle patch(THREAD, data_section_patches()->obj_at(i));
779    if (patch.is_null()) {
780      THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
781    }
782    Handle reference(THREAD, site_DataPatch::reference(patch));
783    if (reference.is_null()) {
784      THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
785    }
786    if (!reference->is_a(site_ConstantReference::klass())) {
787      JVMCI_ERROR_OK("invalid patch in data section: %s", reference->klass()->signature_name());
788    }
789    Handle constant(THREAD, site_ConstantReference::constant(reference));
790    if (constant.is_null()) {
791      THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
792    }
793    address dest = _constants->start() + site_Site::pcOffset(patch);
794    if (constant->is_a(HotSpotMetaspaceConstantImpl::klass())) {
795      if (HotSpotMetaspaceConstantImpl::compressed(constant)) {
796#ifdef _LP64
797        *((narrowKlass*) dest) = record_narrow_metadata_reference(_constants, dest, constant, CHECK_OK);
798#else
799        JVMCI_ERROR_OK("unexpected compressed Klass* in 32-bit mode");
800#endif
801      } else {
802        *((void**) dest) = record_metadata_reference(_constants, dest, constant, CHECK_OK);
803      }
804    } else if (constant->is_a(HotSpotObjectConstantImpl::klass())) {
805      Handle obj(THREAD, HotSpotObjectConstantImpl::object(constant));
806      jobject value = JNIHandles::make_local(obj());
807      int oop_index = _oop_recorder->find_index(value);
808
809      if (HotSpotObjectConstantImpl::compressed(constant)) {
810#ifdef _LP64
811        _constants->relocate(dest, oop_Relocation::spec(oop_index), relocInfo::narrow_oop_in_const);
812#else
813        JVMCI_ERROR_OK("unexpected compressed oop in 32-bit mode");
814#endif
815      } else {
816        _constants->relocate(dest, oop_Relocation::spec(oop_index));
817      }
818    } else {
819      JVMCI_ERROR_OK("invalid constant in data section: %s", constant->klass()->signature_name());
820    }
821  }
822  jint last_pc_offset = -1;
823  for (int i = 0; i < sites->length(); i++) {
824    HandleMark hm(THREAD);
825    Handle site(THREAD, sites->obj_at(i));
826    if (site.is_null()) {
827      THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
828    }
829
830    jint pc_offset = site_Site::pcOffset(site);
831
832    if (site->is_a(site_Call::klass())) {
833      TRACE_jvmci_4("call at %i", pc_offset);
834      site_Call(buffer, pc_offset, site, CHECK_OK);
835    } else if (site->is_a(site_Infopoint::klass())) {
836      // three reasons for infopoints denote actual safepoints
837      oop reason = site_Infopoint::reason(site);
838      if (site_InfopointReason::SAFEPOINT() == reason || site_InfopointReason::CALL() == reason || site_InfopointReason::IMPLICIT_EXCEPTION() == reason) {
839        TRACE_jvmci_4("safepoint at %i", pc_offset);
840        site_Safepoint(buffer, pc_offset, site, CHECK_OK);
841        if (_orig_pc_offset < 0) {
842          JVMCI_ERROR_OK("method contains safepoint, but has no deopt rescue slot");
843        }
844      } else {
845        TRACE_jvmci_4("infopoint at %i", pc_offset);
846        site_Infopoint(buffer, pc_offset, site, CHECK_OK);
847      }
848    } else if (site->is_a(site_DataPatch::klass())) {
849      TRACE_jvmci_4("datapatch at %i", pc_offset);
850      site_DataPatch(buffer, pc_offset, site, CHECK_OK);
851    } else if (site->is_a(site_Mark::klass())) {
852      TRACE_jvmci_4("mark at %i", pc_offset);
853      site_Mark(buffer, pc_offset, site, CHECK_OK);
854    } else if (site->is_a(site_ExceptionHandler::klass())) {
855      TRACE_jvmci_4("exceptionhandler at %i", pc_offset);
856      site_ExceptionHandler(pc_offset, site);
857    } else {
858      JVMCI_ERROR_OK("unexpected site subclass: %s", site->klass()->signature_name());
859    }
860    last_pc_offset = pc_offset;
861
862    if (SafepointSynchronize::do_call_back()) {
863      // this is a hacky way to force a safepoint check but nothing else was jumping out at me.
864      ThreadToNativeFromVM ttnfv(JavaThread::current());
865    }
866  }
867
868#ifndef PRODUCT
869  if (comments() != NULL) {
870    for (int i = 0; i < comments()->length(); i++) {
871      oop comment = comments()->obj_at(i);
872      assert(comment->is_a(HotSpotCompiledCode_Comment::klass()), "cce");
873      jint offset = HotSpotCompiledCode_Comment::pcOffset(comment);
874      char* text = java_lang_String::as_utf8_string(HotSpotCompiledCode_Comment::text(comment));
875      buffer.block_comment(offset, text);
876    }
877  }
878#endif
879  return JVMCIEnv::ok;
880}
881
882void CodeInstaller::assumption_NoFinalizableSubclass(Thread* thread, Handle assumption) {
883  Handle receiverType_handle (thread, Assumptions_NoFinalizableSubclass::receiverType(assumption()));
884  Klass* receiverType = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(receiverType_handle));
885  _dependencies->assert_has_no_finalizable_subclasses(receiverType);
886}
887
888void CodeInstaller::assumption_ConcreteSubtype(Thread* thread, Handle assumption) {
889  Handle context_handle (thread, Assumptions_ConcreteSubtype::context(assumption()));
890  Handle subtype_handle (thread, Assumptions_ConcreteSubtype::subtype(assumption()));
891  Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
892  Klass* subtype = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(subtype_handle));
893
894  assert(context->is_abstract(), "");
895  _dependencies->assert_abstract_with_unique_concrete_subtype(context, subtype);
896}
897
898void CodeInstaller::assumption_LeafType(Thread* thread, Handle assumption) {
899  Handle context_handle (thread, Assumptions_LeafType::context(assumption()));
900  Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
901
902  _dependencies->assert_leaf_type(context);
903}
904
905void CodeInstaller::assumption_ConcreteMethod(Thread* thread, Handle assumption) {
906  Handle impl_handle (thread, Assumptions_ConcreteMethod::impl(assumption()));
907  Handle context_handle (thread, Assumptions_ConcreteMethod::context(assumption()));
908
909  methodHandle impl = getMethodFromHotSpotMethod(impl_handle());
910  Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
911
912  _dependencies->assert_unique_concrete_method(context, impl());
913}
914
915void CodeInstaller::assumption_CallSiteTargetValue(Thread* thread, Handle assumption) {
916  Handle callSite(thread, Assumptions_CallSiteTargetValue::callSite(assumption()));
917  Handle methodHandle(thread, Assumptions_CallSiteTargetValue::methodHandle(assumption()));
918
919  _dependencies->assert_call_site_target_value(callSite(), methodHandle());
920}
921
922void CodeInstaller::site_ExceptionHandler(jint pc_offset, Handle exc) {
923  jint handler_offset = site_ExceptionHandler::handlerPos(exc);
924
925  // Subtable header
926  _exception_handler_table.add_entry(HandlerTableEntry(1, pc_offset, 0));
927
928  // Subtable entry
929  _exception_handler_table.add_entry(HandlerTableEntry(-1, handler_offset, 0));
930}
931
932// If deoptimization happens, the interpreter should reexecute these bytecodes.
933// This function mainly helps the compilers to set up the reexecute bit.
934static bool bytecode_should_reexecute(Bytecodes::Code code) {
935  switch (code) {
936    case Bytecodes::_invokedynamic:
937    case Bytecodes::_invokevirtual:
938    case Bytecodes::_invokeinterface:
939    case Bytecodes::_invokespecial:
940    case Bytecodes::_invokestatic:
941      return false;
942    default:
943      return true;
944    }
945  return true;
946}
947
948GrowableArray<ScopeValue*>* CodeInstaller::record_virtual_objects(Handle debug_info, TRAPS) {
949  objArrayHandle virtualObjects(THREAD, DebugInfo::virtualObjectMapping(debug_info));
950  if (virtualObjects.is_null()) {
951    return NULL;
952  }
953  GrowableArray<ScopeValue*>* objects = new GrowableArray<ScopeValue*>(virtualObjects->length(), virtualObjects->length(), NULL);
954  // Create the unique ObjectValues
955  for (int i = 0; i < virtualObjects->length(); i++) {
956    HandleMark hm(THREAD);
957    Handle value(THREAD, virtualObjects->obj_at(i));
958    int id = VirtualObject::id(value);
959    Handle type(THREAD, VirtualObject::type(value));
960    oop javaMirror = HotSpotResolvedObjectTypeImpl::javaClass(type);
961    ObjectValue* sv = new ObjectValue(id, new ConstantOopWriteValue(JNIHandles::make_local(Thread::current(), javaMirror)));
962    if (id < 0 || id >= objects->length()) {
963      JVMCI_ERROR_NULL("virtual object id %d out of bounds", id);
964    }
965    if (objects->at(id) != NULL) {
966      JVMCI_ERROR_NULL("duplicate virtual object id %d", id);
967    }
968    objects->at_put(id, sv);
969  }
970  // All the values which could be referenced by the VirtualObjects
971  // exist, so now describe all the VirtualObjects themselves.
972  for (int i = 0; i < virtualObjects->length(); i++) {
973    HandleMark hm(THREAD);
974    Handle value(THREAD, virtualObjects->obj_at(i));
975    int id = VirtualObject::id(value);
976    record_object_value(objects->at(id)->as_ObjectValue(), value, objects, CHECK_NULL);
977  }
978  _debug_recorder->dump_object_pool(objects);
979  return objects;
980}
981
982void CodeInstaller::record_scope(jint pc_offset, Handle debug_info, ScopeMode scope_mode, bool return_oop, TRAPS) {
983  Handle position(THREAD, DebugInfo::bytecodePosition(debug_info));
984  if (position.is_null()) {
985    // Stubs do not record scope info, just oop maps
986    return;
987  }
988
989  GrowableArray<ScopeValue*>* objectMapping;
990  if (scope_mode == CodeInstaller::FullFrame) {
991    objectMapping = record_virtual_objects(debug_info, CHECK);
992  } else {
993    objectMapping = NULL;
994  }
995  record_scope(pc_offset, position, scope_mode, objectMapping, return_oop, CHECK);
996}
997
998void CodeInstaller::record_scope(jint pc_offset, Handle position, ScopeMode scope_mode, GrowableArray<ScopeValue*>* objects, bool return_oop, TRAPS) {
999  Handle frame;
1000  if (scope_mode == CodeInstaller::FullFrame) {
1001    if (!position->is_a(BytecodeFrame::klass())) {
1002      JVMCI_ERROR("Full frame expected for debug info at %i", pc_offset);
1003    }
1004    frame = position;
1005  }
1006  Handle caller_frame (THREAD, BytecodePosition::caller(position));
1007  if (caller_frame.not_null()) {
1008    record_scope(pc_offset, caller_frame, scope_mode, objects, return_oop, CHECK);
1009  }
1010
1011  Handle hotspot_method (THREAD, BytecodePosition::method(position));
1012  Method* method = getMethodFromHotSpotMethod(hotspot_method());
1013  jint bci = BytecodePosition::bci(position);
1014  if (bci == BytecodeFrame::BEFORE_BCI()) {
1015    bci = SynchronizationEntryBCI;
1016  }
1017
1018  TRACE_jvmci_2("Recording scope pc_offset=%d bci=%d method=%s", pc_offset, bci, method->name_and_sig_as_C_string());
1019
1020  bool reexecute = false;
1021  if (frame.not_null()) {
1022    if (bci == SynchronizationEntryBCI){
1023       reexecute = false;
1024    } else {
1025      Bytecodes::Code code = Bytecodes::java_code_at(method, method->bcp_from(bci));
1026      reexecute = bytecode_should_reexecute(code);
1027      if (frame.not_null()) {
1028        reexecute = (BytecodeFrame::duringCall(frame) == JNI_FALSE);
1029      }
1030    }
1031  }
1032
1033  DebugToken* locals_token = NULL;
1034  DebugToken* expressions_token = NULL;
1035  DebugToken* monitors_token = NULL;
1036  bool throw_exception = false;
1037
1038  if (frame.not_null()) {
1039    jint local_count = BytecodeFrame::numLocals(frame);
1040    jint expression_count = BytecodeFrame::numStack(frame);
1041    jint monitor_count = BytecodeFrame::numLocks(frame);
1042    objArrayHandle values(THREAD, BytecodeFrame::values(frame));
1043    objArrayHandle slotKinds(THREAD, BytecodeFrame::slotKinds(frame));
1044
1045    if (values.is_null() || slotKinds.is_null()) {
1046      THROW(vmSymbols::java_lang_NullPointerException());
1047    }
1048    if (local_count + expression_count + monitor_count != values->length()) {
1049      JVMCI_ERROR("unexpected values length %d in scope (%d locals, %d expressions, %d monitors)", values->length(), local_count, expression_count, monitor_count);
1050    }
1051    if (local_count + expression_count != slotKinds->length()) {
1052      JVMCI_ERROR("unexpected slotKinds length %d in scope (%d locals, %d expressions)", slotKinds->length(), local_count, expression_count);
1053    }
1054
1055    GrowableArray<ScopeValue*>* locals = local_count > 0 ? new GrowableArray<ScopeValue*> (local_count) : NULL;
1056    GrowableArray<ScopeValue*>* expressions = expression_count > 0 ? new GrowableArray<ScopeValue*> (expression_count) : NULL;
1057    GrowableArray<MonitorValue*>* monitors = monitor_count > 0 ? new GrowableArray<MonitorValue*> (monitor_count) : NULL;
1058
1059    TRACE_jvmci_2("Scope at bci %d with %d values", bci, values->length());
1060    TRACE_jvmci_2("%d locals %d expressions, %d monitors", local_count, expression_count, monitor_count);
1061
1062    for (jint i = 0; i < values->length(); i++) {
1063      HandleMark hm(THREAD);
1064      ScopeValue* second = NULL;
1065      Handle value(THREAD, values->obj_at(i));
1066      if (i < local_count) {
1067        BasicType type = JVMCIRuntime::kindToBasicType(Handle(THREAD, slotKinds->obj_at(i)), CHECK);
1068        ScopeValue* first = get_scope_value(value, type, objects, second, CHECK);
1069        if (second != NULL) {
1070          locals->append(second);
1071        }
1072        locals->append(first);
1073      } else if (i < local_count + expression_count) {
1074        BasicType type = JVMCIRuntime::kindToBasicType(Handle(THREAD, slotKinds->obj_at(i)), CHECK);
1075        ScopeValue* first = get_scope_value(value, type, objects, second, CHECK);
1076        if (second != NULL) {
1077          expressions->append(second);
1078        }
1079        expressions->append(first);
1080      } else {
1081        MonitorValue *monitor = get_monitor_value(value, objects, CHECK);
1082        monitors->append(monitor);
1083      }
1084      if (second != NULL) {
1085        i++;
1086        if (i >= values->length() || values->obj_at(i) != Value::ILLEGAL()) {
1087          JVMCI_ERROR("double-slot value not followed by Value.ILLEGAL");
1088        }
1089      }
1090    }
1091
1092    locals_token = _debug_recorder->create_scope_values(locals);
1093    expressions_token = _debug_recorder->create_scope_values(expressions);
1094    monitors_token = _debug_recorder->create_monitor_values(monitors);
1095
1096    throw_exception = BytecodeFrame::rethrowException(frame) == JNI_TRUE;
1097  }
1098
1099  _debug_recorder->describe_scope(pc_offset, method, NULL, bci, reexecute, throw_exception, false, return_oop,
1100                                  locals_token, expressions_token, monitors_token);
1101}
1102
1103void CodeInstaller::site_Safepoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1104  Handle debug_info (THREAD, site_Infopoint::debugInfo(site));
1105  if (debug_info.is_null()) {
1106    JVMCI_ERROR("debug info expected at safepoint at %i", pc_offset);
1107  }
1108
1109  // address instruction = _instructions->start() + pc_offset;
1110  // jint next_pc_offset = Assembler::locate_next_instruction(instruction) - _instructions->start();
1111  OopMap *map = create_oop_map(debug_info, CHECK);
1112  _debug_recorder->add_safepoint(pc_offset, map);
1113  record_scope(pc_offset, debug_info, CodeInstaller::FullFrame, CHECK);
1114  _debug_recorder->end_safepoint(pc_offset);
1115}
1116
1117void CodeInstaller::site_Infopoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1118  Handle debug_info (THREAD, site_Infopoint::debugInfo(site));
1119  if (debug_info.is_null()) {
1120    JVMCI_ERROR("debug info expected at infopoint at %i", pc_offset);
1121  }
1122
1123  // We'd like to check that pc_offset is greater than the
1124  // last pc recorded with _debug_recorder (raising an exception if not)
1125  // but DebugInformationRecorder doesn't have sufficient public API.
1126
1127  _debug_recorder->add_non_safepoint(pc_offset);
1128  record_scope(pc_offset, debug_info, CodeInstaller::BytecodePosition, CHECK);
1129  _debug_recorder->end_non_safepoint(pc_offset);
1130}
1131
1132void CodeInstaller::site_Call(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1133  Handle target(THREAD, site_Call::target(site));
1134  InstanceKlass* target_klass = InstanceKlass::cast(target->klass());
1135
1136  Handle hotspot_method; // JavaMethod
1137  Handle foreign_call;
1138
1139  if (target_klass->is_subclass_of(SystemDictionary::HotSpotForeignCallTarget_klass())) {
1140    foreign_call = target;
1141  } else {
1142    hotspot_method = target;
1143  }
1144
1145  Handle debug_info (THREAD, site_Call::debugInfo(site));
1146
1147  assert(hotspot_method.not_null() ^ foreign_call.not_null(), "Call site needs exactly one type");
1148
1149  NativeInstruction* inst = nativeInstruction_at(_instructions->start() + pc_offset);
1150  jint next_pc_offset = CodeInstaller::pd_next_offset(inst, pc_offset, hotspot_method, CHECK);
1151
1152  if (debug_info.not_null()) {
1153    OopMap *map = create_oop_map(debug_info, CHECK);
1154    _debug_recorder->add_safepoint(next_pc_offset, map);
1155
1156    bool return_oop = hotspot_method.not_null() && getMethodFromHotSpotMethod(hotspot_method())->is_returning_oop();
1157
1158    record_scope(next_pc_offset, debug_info, CodeInstaller::FullFrame, return_oop, CHECK);
1159  }
1160
1161  if (foreign_call.not_null()) {
1162    jlong foreign_call_destination = HotSpotForeignCallTarget::address(foreign_call);
1163    if (_immutable_pic_compilation) {
1164      // Use fake short distance during PIC compilation.
1165      foreign_call_destination = (jlong)(_instructions->start() + pc_offset);
1166    }
1167    CodeInstaller::pd_relocate_ForeignCall(inst, foreign_call_destination, CHECK);
1168  } else { // method != NULL
1169    if (debug_info.is_null()) {
1170      JVMCI_ERROR("debug info expected at call at %i", pc_offset);
1171    }
1172
1173    TRACE_jvmci_3("method call");
1174    CodeInstaller::pd_relocate_JavaMethod(hotspot_method, pc_offset, CHECK);
1175    if (_next_call_type == INVOKESTATIC || _next_call_type == INVOKESPECIAL) {
1176      // Need a static call stub for transitions from compiled to interpreted.
1177      CompiledStaticCall::emit_to_interp_stub(buffer, _instructions->start() + pc_offset);
1178    }
1179#if INCLUDE_AOT
1180    // Trampoline to far aot code.
1181    CompiledStaticCall::emit_to_aot_stub(buffer, _instructions->start() + pc_offset);
1182#endif
1183  }
1184
1185  _next_call_type = INVOKE_INVALID;
1186
1187  if (debug_info.not_null()) {
1188    _debug_recorder->end_safepoint(next_pc_offset);
1189  }
1190}
1191
1192void CodeInstaller::site_DataPatch(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1193  Handle reference(THREAD, site_DataPatch::reference(site));
1194  if (reference.is_null()) {
1195    THROW(vmSymbols::java_lang_NullPointerException());
1196  } else if (reference->is_a(site_ConstantReference::klass())) {
1197    Handle constant(THREAD, site_ConstantReference::constant(reference));
1198    if (constant.is_null()) {
1199      THROW(vmSymbols::java_lang_NullPointerException());
1200    } else if (constant->is_a(HotSpotObjectConstantImpl::klass())) {
1201      if (!_immutable_pic_compilation) {
1202        // Do not patch during PIC compilation.
1203        pd_patch_OopConstant(pc_offset, constant, CHECK);
1204      }
1205    } else if (constant->is_a(HotSpotMetaspaceConstantImpl::klass())) {
1206      if (!_immutable_pic_compilation) {
1207        pd_patch_MetaspaceConstant(pc_offset, constant, CHECK);
1208      }
1209    } else if (constant->is_a(HotSpotSentinelConstant::klass())) {
1210      if (!_immutable_pic_compilation) {
1211        JVMCI_ERROR("sentinel constant not supported for normal compiles: %s", constant->klass()->signature_name());
1212      }
1213    } else {
1214      JVMCI_ERROR("unknown constant type in data patch: %s", constant->klass()->signature_name());
1215    }
1216  } else if (reference->is_a(site_DataSectionReference::klass())) {
1217    int data_offset = site_DataSectionReference::offset(reference);
1218    if (0 <= data_offset && data_offset < _constants_size) {
1219      pd_patch_DataSectionReference(pc_offset, data_offset, CHECK);
1220    } else {
1221      JVMCI_ERROR("data offset 0x%X points outside data section (size 0x%X)", data_offset, _constants_size);
1222    }
1223  } else {
1224    JVMCI_ERROR("unknown data patch type: %s", reference->klass()->signature_name());
1225  }
1226}
1227
1228void CodeInstaller::site_Mark(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
1229  Handle id_obj (THREAD, site_Mark::id(site));
1230
1231  if (id_obj.not_null()) {
1232    if (!java_lang_boxing_object::is_instance(id_obj(), T_INT)) {
1233      JVMCI_ERROR("expected Integer id, got %s", id_obj->klass()->signature_name());
1234    }
1235    jint id = id_obj->int_field(java_lang_boxing_object::value_offset_in_bytes(T_INT));
1236
1237    address pc = _instructions->start() + pc_offset;
1238
1239    switch (id) {
1240      case UNVERIFIED_ENTRY:
1241        _offsets.set_value(CodeOffsets::Entry, pc_offset);
1242        break;
1243      case VERIFIED_ENTRY:
1244        _offsets.set_value(CodeOffsets::Verified_Entry, pc_offset);
1245        break;
1246      case OSR_ENTRY:
1247        _offsets.set_value(CodeOffsets::OSR_Entry, pc_offset);
1248        break;
1249      case EXCEPTION_HANDLER_ENTRY:
1250        _offsets.set_value(CodeOffsets::Exceptions, pc_offset);
1251        break;
1252      case DEOPT_HANDLER_ENTRY:
1253        _offsets.set_value(CodeOffsets::Deopt, pc_offset);
1254        break;
1255      case INVOKEVIRTUAL:
1256      case INVOKEINTERFACE:
1257      case INLINE_INVOKE:
1258      case INVOKESTATIC:
1259      case INVOKESPECIAL:
1260        _next_call_type = (MarkId) id;
1261        _invoke_mark_pc = pc;
1262        break;
1263      case POLL_NEAR:
1264      case POLL_FAR:
1265      case POLL_RETURN_NEAR:
1266      case POLL_RETURN_FAR:
1267        pd_relocate_poll(pc, id, CHECK);
1268        break;
1269      case CARD_TABLE_SHIFT:
1270      case CARD_TABLE_ADDRESS:
1271      case HEAP_TOP_ADDRESS:
1272      case HEAP_END_ADDRESS:
1273      case NARROW_KLASS_BASE_ADDRESS:
1274      case NARROW_OOP_BASE_ADDRESS:
1275      case CRC_TABLE_ADDRESS:
1276      case LOG_OF_HEAP_REGION_GRAIN_BYTES:
1277      case INLINE_CONTIGUOUS_ALLOCATION_SUPPORTED:
1278        break;
1279      default:
1280        JVMCI_ERROR("invalid mark id: %d", id);
1281        break;
1282    }
1283  }
1284}
1285
1286