/*
* Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include "precompiled.hpp"
#include "asm/register.hpp"
#include "classfile/vmSymbols.hpp"
#include "code/compiledIC.hpp"
#include "code/vmreg.inline.hpp"
#include "compiler/compileBroker.hpp"
#include "compiler/disassembler.hpp"
#include "jvmci/jvmciEnv.hpp"
#include "jvmci/jvmciCompiler.hpp"
#include "jvmci/jvmciCodeInstaller.hpp"
#include "jvmci/jvmciJavaClasses.hpp"
#include "jvmci/jvmciCompilerToVM.hpp"
#include "jvmci/jvmciRuntime.hpp"
#include "oops/oop.inline.hpp"
#include "oops/objArrayOop.inline.hpp"
#include "runtime/javaCalls.hpp"
#include "runtime/safepointMechanism.inline.hpp"
#include "utilities/align.hpp"
// frequently used constants
// Allocate them with new so they are never destroyed (otherwise, a
// forced exit could destroy these objects while they are still in
// use).
ConstantOopWriteValue* CodeInstaller::_oop_null_scope_value = new (ResourceObj::C_HEAP, mtCompiler) ConstantOopWriteValue(NULL);
ConstantIntValue* CodeInstaller::_int_m1_scope_value = new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(-1);
ConstantIntValue* CodeInstaller::_int_0_scope_value = new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue((jint)0);
ConstantIntValue* CodeInstaller::_int_1_scope_value = new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(1);
ConstantIntValue* CodeInstaller::_int_2_scope_value = new (ResourceObj::C_HEAP, mtCompiler) ConstantIntValue(2);
LocationValue* CodeInstaller::_illegal_value = new (ResourceObj::C_HEAP, mtCompiler) LocationValue(Location());
Method* getMethodFromHotSpotMethod(oop hotspot_method) {
assert(hotspot_method != NULL && hotspot_method->is_a(HotSpotResolvedJavaMethodImpl::klass()), "sanity");
return CompilerToVM::asMethod(hotspot_method);
}
VMReg getVMRegFromLocation(Handle location, int total_frame_size, TRAPS) {
if (location.is_null()) {
THROW_NULL(vmSymbols::java_lang_NullPointerException());
}
Handle reg(THREAD, code_Location::reg(location));
jint offset = code_Location::offset(location);
if (reg.not_null()) {
// register
jint number = code_Register::number(reg);
VMReg vmReg = CodeInstaller::get_hotspot_reg(number, CHECK_NULL);
if (offset % 4 == 0) {
return vmReg->next(offset / 4);
} else {
JVMCI_ERROR_NULL("unaligned subregister offset %d in oop map", offset);
}
} else {
// stack slot
if (offset % 4 == 0) {
VMReg vmReg = VMRegImpl::stack2reg(offset / 4);
if (!OopMapValue::legal_vm_reg_name(vmReg)) {
// This restriction only applies to VMRegs that are used in OopMap but
// since that's the only use of VMRegs it's simplest to put this test
// here. This test should also be equivalent legal_vm_reg_name but JVMCI
// clients can use max_oop_map_stack_stack_offset to detect this problem
// directly. The asserts just ensure that the tests are in agreement.
assert(offset > CompilerToVM::Data::max_oop_map_stack_offset(), "illegal VMReg");
JVMCI_ERROR_NULL("stack offset %d is too large to be encoded in OopMap (max %d)",
offset, CompilerToVM::Data::max_oop_map_stack_offset());
}
assert(OopMapValue::legal_vm_reg_name(vmReg), "illegal VMReg");
return vmReg;
} else {
JVMCI_ERROR_NULL("unaligned stack offset %d in oop map", offset);
}
}
}
// creates a HotSpot oop map out of the byte arrays provided by DebugInfo
OopMap* CodeInstaller::create_oop_map(Handle debug_info, TRAPS) {
Handle reference_map(THREAD, DebugInfo::referenceMap(debug_info));
if (reference_map.is_null()) {
THROW_NULL(vmSymbols::java_lang_NullPointerException());
}
if (!reference_map->is_a(HotSpotReferenceMap::klass())) {
JVMCI_ERROR_NULL("unknown reference map: %s", reference_map->klass()->signature_name());
}
if (HotSpotReferenceMap::maxRegisterSize(reference_map) > 16) {
_has_wide_vector = true;
}
OopMap* map = new OopMap(_total_frame_size, _parameter_count);
objArrayHandle objects(THREAD, HotSpotReferenceMap::objects(reference_map));
objArrayHandle derivedBase(THREAD, HotSpotReferenceMap::derivedBase(reference_map));
typeArrayHandle sizeInBytes(THREAD, HotSpotReferenceMap::sizeInBytes(reference_map));
if (objects.is_null() || derivedBase.is_null() || sizeInBytes.is_null()) {
THROW_NULL(vmSymbols::java_lang_NullPointerException());
}
if (objects->length() != derivedBase->length() || objects->length() != sizeInBytes->length()) {
JVMCI_ERROR_NULL("arrays in reference map have different sizes: %d %d %d", objects->length(), derivedBase->length(), sizeInBytes->length());
}
for (int i = 0; i < objects->length(); i++) {
Handle location(THREAD, objects->obj_at(i));
Handle baseLocation(THREAD, derivedBase->obj_at(i));
int bytes = sizeInBytes->int_at(i);
VMReg vmReg = getVMRegFromLocation(location, _total_frame_size, CHECK_NULL);
if (baseLocation.not_null()) {
// derived oop
#ifdef _LP64
if (bytes == 8) {
#else
if (bytes == 4) {
#endif
VMReg baseReg = getVMRegFromLocation(baseLocation, _total_frame_size, CHECK_NULL);
map->set_derived_oop(vmReg, baseReg);
} else {
JVMCI_ERROR_NULL("invalid derived oop size in ReferenceMap: %d", bytes);
}
#ifdef _LP64
} else if (bytes == 8) {
// wide oop
map->set_oop(vmReg);
} else if (bytes == 4) {
// narrow oop
map->set_narrowoop(vmReg);
#else
} else if (bytes == 4) {
map->set_oop(vmReg);
#endif
} else {
JVMCI_ERROR_NULL("invalid oop size in ReferenceMap: %d", bytes);
}
}
Handle callee_save_info(THREAD, (oop) DebugInfo::calleeSaveInfo(debug_info));
if (callee_save_info.not_null()) {
objArrayHandle registers(THREAD, RegisterSaveLayout::registers(callee_save_info));
typeArrayHandle slots(THREAD, RegisterSaveLayout::slots(callee_save_info));
for (jint i = 0; i < slots->length(); i++) {
Handle jvmci_reg (THREAD, registers->obj_at(i));
jint jvmci_reg_number = code_Register::number(jvmci_reg);
VMReg hotspot_reg = CodeInstaller::get_hotspot_reg(jvmci_reg_number, CHECK_NULL);
// HotSpot stack slots are 4 bytes
jint jvmci_slot = slots->int_at(i);
jint hotspot_slot = jvmci_slot * VMRegImpl::slots_per_word;
VMReg hotspot_slot_as_reg = VMRegImpl::stack2reg(hotspot_slot);
map->set_callee_saved(hotspot_slot_as_reg, hotspot_reg);
#ifdef _LP64
// (copied from generate_oop_map() in c1_Runtime1_x86.cpp)
VMReg hotspot_slot_hi_as_reg = VMRegImpl::stack2reg(hotspot_slot + 1);
map->set_callee_saved(hotspot_slot_hi_as_reg, hotspot_reg->next());
#endif
}
}
return map;
}
AOTOopRecorder::AOTOopRecorder(Arena* arena, bool deduplicate) : OopRecorder(arena, deduplicate) {
_meta_refs = new GrowableArray<jobject>();
}
int AOTOopRecorder::nr_meta_refs() const {
return _meta_refs->length();
}
jobject AOTOopRecorder::meta_element(int pos) const {
return _meta_refs->at(pos);
}
int AOTOopRecorder::find_index(Metadata* h) {
JavaThread* THREAD = JavaThread::current();
int oldCount = metadata_count();
int index = this->OopRecorder::find_index(h);
int newCount = metadata_count();
if (oldCount == newCount) {
// found a match
return index;
}
vmassert(index + 1 == newCount, "must be last");
Klass* klass = NULL;
oop result = NULL;
if (h->is_klass()) {
klass = (Klass*) h;
result = CompilerToVM::get_jvmci_type(klass, CATCH);
} else if (h->is_method()) {
Method* method = (Method*) h;
methodHandle mh(method);
result = CompilerToVM::get_jvmci_method(method, CATCH);
}
jobject ref = JNIHandles::make_local(THREAD, result);
record_meta_ref(ref, index);
return index;
}
int AOTOopRecorder::find_index(jobject h) {
if (h == NULL) {
return 0;
}
oop javaMirror = JNIHandles::resolve(h);
Klass* klass = java_lang_Class::as_Klass(javaMirror);
return find_index(klass);
}
void AOTOopRecorder::record_meta_ref(jobject o, int index) {
assert(index > 0, "must be 1..n");
index -= 1; // reduce by one to convert to array index
assert(index == _meta_refs->length(), "must be last");
_meta_refs->append(o);
}
void* CodeInstaller::record_metadata_reference(CodeSection* section, address dest, Handle constant, TRAPS) {
/*
* This method needs to return a raw (untyped) pointer, since the value of a pointer to the base
* class is in general not equal to the pointer of the subclass. When patching metaspace pointers,
* the compiler expects a direct pointer to the subclass (Klass* or Method*), not a pointer to the
* base class (Metadata* or MetaspaceObj*).
*/
oop obj = HotSpotMetaspaceConstantImpl::metaspaceObject(constant);
if (obj->is_a(HotSpotResolvedObjectTypeImpl::klass())) {
Klass* klass = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(obj));
assert(!HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected compressed klass pointer %s @ " INTPTR_FORMAT, klass->name()->as_C_string(), p2i(klass));
int index = _oop_recorder->find_index(klass);
section->relocate(dest, metadata_Relocation::spec(index));
TRACE_jvmci_3("metadata[%d of %d] = %s", index, _oop_recorder->metadata_count(), klass->name()->as_C_string());
return klass;
} else if (obj->is_a(HotSpotResolvedJavaMethodImpl::klass())) {
Method* method = (Method*) (address) HotSpotResolvedJavaMethodImpl::metaspaceMethod(obj);
assert(!HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected compressed method pointer %s @ " INTPTR_FORMAT, method->name()->as_C_string(), p2i(method));
int index = _oop_recorder->find_index(method);
section->relocate(dest, metadata_Relocation::spec(index));
TRACE_jvmci_3("metadata[%d of %d] = %s", index, _oop_recorder->metadata_count(), method->name()->as_C_string());
return method;
} else {
JVMCI_ERROR_NULL("unexpected metadata reference for constant of type %s", obj->klass()->signature_name());
}
}
#ifdef _LP64
narrowKlass CodeInstaller::record_narrow_metadata_reference(CodeSection* section, address dest, Handle constant, TRAPS) {
oop obj = HotSpotMetaspaceConstantImpl::metaspaceObject(constant);
assert(HotSpotMetaspaceConstantImpl::compressed(constant), "unexpected uncompressed pointer");
if (!obj->is_a(HotSpotResolvedObjectTypeImpl::klass())) {
JVMCI_ERROR_0("unexpected compressed pointer of type %s", obj->klass()->signature_name());
}
Klass* klass = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(obj));
int index = _oop_recorder->find_index(klass);
section->relocate(dest, metadata_Relocation::spec(index));
TRACE_jvmci_3("narrowKlass[%d of %d] = %s", index, _oop_recorder->metadata_count(), klass->name()->as_C_string());
return Klass::encode_klass(klass);
}
#endif
Location::Type CodeInstaller::get_oop_type(Thread* thread, Handle value) {
Handle valueKind(thread, Value::valueKind(value));
Handle platformKind(thread, ValueKind::platformKind(valueKind));
if (platformKind == word_kind()) {
return Location::oop;
} else {
return Location::narrowoop;
}
}
ScopeValue* CodeInstaller::get_scope_value(Handle value, BasicType type, GrowableArray<ScopeValue*>* objects, ScopeValue* &second, TRAPS) {
second = NULL;
if (value.is_null()) {
THROW_NULL(vmSymbols::java_lang_NullPointerException());
} else if (value == Value::ILLEGAL()) {
if (type != T_ILLEGAL) {
JVMCI_ERROR_NULL("unexpected illegal value, expected %s", basictype_to_str(type));
}
return _illegal_value;
} else if (value->is_a(RegisterValue::klass())) {
Handle reg(THREAD, RegisterValue::reg(value));
jint number = code_Register::number(reg);
VMReg hotspotRegister = get_hotspot_reg(number, CHECK_NULL);
if (is_general_purpose_reg(hotspotRegister)) {
Location::Type locationType;
if (type == T_OBJECT) {
locationType = get_oop_type(THREAD, value);
} else if (type == T_LONG) {
locationType = Location::lng;
} else if (type == T_INT || type == T_FLOAT || type == T_SHORT || type == T_CHAR || type == T_BYTE || type == T_BOOLEAN) {
locationType = Location::int_in_long;
} else {
JVMCI_ERROR_NULL("unexpected type %s in cpu register", basictype_to_str(type));
}
ScopeValue* value = new LocationValue(Location::new_reg_loc(locationType, hotspotRegister));
if (type == T_LONG) {
second = value;
}
return value;
} else {
Location::Type locationType;
if (type == T_FLOAT) {
// this seems weird, but the same value is used in c1_LinearScan
locationType = Location::normal;
} else if (type == T_DOUBLE) {
locationType = Location::dbl;
} else {
JVMCI_ERROR_NULL("unexpected type %s in floating point register", basictype_to_str(type));
}
ScopeValue* value = new LocationValue(Location::new_reg_loc(locationType, hotspotRegister));
if (type == T_DOUBLE) {
second = value;
}
return value;
}
} else if (value->is_a(StackSlot::klass())) {
jint offset = StackSlot::offset(value);
if (StackSlot::addFrameSize(value)) {
offset += _total_frame_size;
}
Location::Type locationType;
if (type == T_OBJECT) {
locationType = get_oop_type(THREAD, value);
} else if (type == T_LONG) {
locationType = Location::lng;
} else if (type == T_DOUBLE) {
locationType = Location::dbl;
} else if (type == T_INT || type == T_FLOAT || type == T_SHORT || type == T_CHAR || type == T_BYTE || type == T_BOOLEAN) {
locationType = Location::normal;
} else {
JVMCI_ERROR_NULL("unexpected type %s in stack slot", basictype_to_str(type));
}
ScopeValue* value = new LocationValue(Location::new_stk_loc(locationType, offset));
if (type == T_DOUBLE || type == T_LONG) {
second = value;
}
return value;
} else if (value->is_a(JavaConstant::klass())) {
if (value->is_a(PrimitiveConstant::klass())) {
if (value->is_a(RawConstant::klass())) {
jlong prim = PrimitiveConstant::primitive(value);
return new ConstantLongValue(prim);
} else {
Handle primitive_constant_kind(THREAD, PrimitiveConstant::kind(value));
BasicType constantType = JVMCIRuntime::kindToBasicType(primitive_constant_kind, CHECK_NULL);
if (type != constantType) {
JVMCI_ERROR_NULL("primitive constant type doesn't match, expected %s but got %s", basictype_to_str(type), basictype_to_str(constantType));
}
if (type == T_INT || type == T_FLOAT) {
jint prim = (jint)PrimitiveConstant::primitive(value);
switch (prim) {
case -1: return _int_m1_scope_value;
case 0: return _int_0_scope_value;
case 1: return _int_1_scope_value;
case 2: return _int_2_scope_value;
default: return new ConstantIntValue(prim);
}
} else if (type == T_LONG || type == T_DOUBLE) {
jlong prim = PrimitiveConstant::primitive(value);
second = _int_1_scope_value;
return new ConstantLongValue(prim);
} else {
JVMCI_ERROR_NULL("unexpected primitive constant type %s", basictype_to_str(type));
}
}
} else if (value->is_a(NullConstant::klass()) || value->is_a(HotSpotCompressedNullConstant::klass())) {
if (type == T_OBJECT) {
return _oop_null_scope_value;
} else {
JVMCI_ERROR_NULL("unexpected null constant, expected %s", basictype_to_str(type));
}
} else if (value->is_a(HotSpotObjectConstantImpl::klass())) {
if (type == T_OBJECT) {
oop obj = HotSpotObjectConstantImpl::object(value);
if (obj == NULL) {
JVMCI_ERROR_NULL("null value must be in NullConstant");
}
return new ConstantOopWriteValue(JNIHandles::make_local(obj));
} else {
JVMCI_ERROR_NULL("unexpected object constant, expected %s", basictype_to_str(type));
}
}
} else if (value->is_a(VirtualObject::klass())) {
if (type == T_OBJECT) {
int id = VirtualObject::id(value);
if (0 <= id && id < objects->length()) {
ScopeValue* object = objects->at(id);
if (object != NULL) {
return object;
}
}
JVMCI_ERROR_NULL("unknown virtual object id %d", id);
} else {
JVMCI_ERROR_NULL("unexpected virtual object, expected %s", basictype_to_str(type));
}
}
JVMCI_ERROR_NULL("unexpected value in scope: %s", value->klass()->signature_name())
}
void CodeInstaller::record_object_value(ObjectValue* sv, Handle value, GrowableArray<ScopeValue*>* objects, TRAPS) {
// Might want a HandleMark here.
Handle type(THREAD, VirtualObject::type(value));
int id = VirtualObject::id(value);
oop javaMirror = HotSpotResolvedObjectTypeImpl::javaClass(type);
Klass* klass = java_lang_Class::as_Klass(javaMirror);
bool isLongArray = klass == Universe::longArrayKlassObj();
objArrayHandle values(THREAD, VirtualObject::values(value));
objArrayHandle slotKinds(THREAD, VirtualObject::slotKinds(value));
for (jint i = 0; i < values->length(); i++) {
HandleMark hm(THREAD);
ScopeValue* cur_second = NULL;
Handle object(THREAD, values->obj_at(i));
Handle slot_kind (THREAD, slotKinds->obj_at(i));
BasicType type = JVMCIRuntime::kindToBasicType(slot_kind, CHECK);
ScopeValue* value = get_scope_value(object, type, objects, cur_second, CHECK);
if (isLongArray && cur_second == NULL) {
// we're trying to put ints into a long array... this isn't really valid, but it's used for some optimizations.
// add an int 0 constant
cur_second = _int_0_scope_value;
}
if (cur_second != NULL) {
sv->field_values()->append(cur_second);
}
assert(value != NULL, "missing value");
sv->field_values()->append(value);
}
}
MonitorValue* CodeInstaller::get_monitor_value(Handle value, GrowableArray<ScopeValue*>* objects, TRAPS) {
if (value.is_null()) {
THROW_NULL(vmSymbols::java_lang_NullPointerException());
}
if (!value->is_a(StackLockValue::klass())) {
JVMCI_ERROR_NULL("Monitors must be of type StackLockValue, got %s", value->klass()->signature_name());
}
ScopeValue* second = NULL;
Handle stack_lock_owner(THREAD, StackLockValue::owner(value));
ScopeValue* owner_value = get_scope_value(stack_lock_owner, T_OBJECT, objects, second, CHECK_NULL);
assert(second == NULL, "monitor cannot occupy two stack slots");
Handle stack_lock_slot(THREAD, StackLockValue::slot(value));
ScopeValue* lock_data_value = get_scope_value(stack_lock_slot, T_LONG, objects, second, CHECK_NULL);
assert(second == lock_data_value, "monitor is LONG value that occupies two stack slots");
assert(lock_data_value->is_location(), "invalid monitor location");
Location lock_data_loc = ((LocationValue*)lock_data_value)->location();
bool eliminated = false;
if (StackLockValue::eliminated(value)) {
eliminated = true;
}
return new MonitorValue(owner_value, lock_data_loc, eliminated);
}
void CodeInstaller::initialize_dependencies(oop compiled_code, OopRecorder* recorder, TRAPS) {
JavaThread* thread = JavaThread::current();
assert(THREAD == thread, "");
CompilerThread* compilerThread = thread->is_Compiler_thread() ? thread->as_CompilerThread() : NULL;
_oop_recorder = recorder;
_dependencies = new Dependencies(&_arena, _oop_recorder, compilerThread != NULL ? compilerThread->log() : NULL);
objArrayHandle assumptions(THREAD, HotSpotCompiledCode::assumptions(compiled_code));
if (!assumptions.is_null()) {
int length = assumptions->length();
for (int i = 0; i < length; ++i) {
Handle assumption(THREAD, assumptions->obj_at(i));
if (!assumption.is_null()) {
if (assumption->klass() == Assumptions_NoFinalizableSubclass::klass()) {
assumption_NoFinalizableSubclass(THREAD, assumption);
} else if (assumption->klass() == Assumptions_ConcreteSubtype::klass()) {
assumption_ConcreteSubtype(THREAD, assumption);
} else if (assumption->klass() == Assumptions_LeafType::klass()) {
assumption_LeafType(THREAD, assumption);
} else if (assumption->klass() == Assumptions_ConcreteMethod::klass()) {
assumption_ConcreteMethod(THREAD, assumption);
} else if (assumption->klass() == Assumptions_CallSiteTargetValue::klass()) {
assumption_CallSiteTargetValue(THREAD, assumption);
} else {
JVMCI_ERROR("unexpected Assumption subclass %s", assumption->klass()->signature_name());
}
}
}
}
if (JvmtiExport::can_hotswap_or_post_breakpoint()) {
objArrayHandle methods(THREAD, HotSpotCompiledCode::methods(compiled_code));
if (!methods.is_null()) {
int length = methods->length();
for (int i = 0; i < length; ++i) {
Handle method_handle(THREAD, methods->obj_at(i));
methodHandle method = getMethodFromHotSpotMethod(method_handle());
_dependencies->assert_evol_method(method());
}
}
}
}
RelocBuffer::~RelocBuffer() {
if (_buffer != NULL) {
FREE_C_HEAP_ARRAY(char, _buffer);
}
}
address RelocBuffer::begin() const {
if (_buffer != NULL) {
return (address) _buffer;
}
return (address) _static_buffer;
}
void RelocBuffer::set_size(size_t bytes) {
assert(bytes <= _size, "can't grow in size!");
_size = bytes;
}
void RelocBuffer::ensure_size(size_t bytes) {
assert(_buffer == NULL, "can only be used once");
assert(_size == 0, "can only be used once");
if (bytes >= RelocBuffer::stack_size) {
_buffer = NEW_C_HEAP_ARRAY(char, bytes, mtInternal);
}
_size = bytes;
}
JVMCIEnv::CodeInstallResult CodeInstaller::gather_metadata(Handle target, Handle compiled_code, CodeMetadata& metadata, TRAPS) {
CodeBuffer buffer("JVMCI Compiler CodeBuffer for Metadata");
jobject compiled_code_obj = JNIHandles::make_local(compiled_code());
AOTOopRecorder* recorder = new AOTOopRecorder(&_arena, true);
initialize_dependencies(JNIHandles::resolve(compiled_code_obj), recorder, CHECK_OK);
metadata.set_oop_recorder(recorder);
// Get instructions and constants CodeSections early because we need it.
_instructions = buffer.insts();
_constants = buffer.consts();
initialize_fields(target(), JNIHandles::resolve(compiled_code_obj), CHECK_OK);
JVMCIEnv::CodeInstallResult result = initialize_buffer(buffer, false, CHECK_OK);
if (result != JVMCIEnv::ok) {
return result;
}
_debug_recorder->pcs_size(); // create the sentinel record
assert(_debug_recorder->pcs_length() >= 2, "must be at least 2");
metadata.set_pc_desc(_debug_recorder->pcs(), _debug_recorder->pcs_length());
metadata.set_scopes(_debug_recorder->stream()->buffer(), _debug_recorder->data_size());
metadata.set_exception_table(&_exception_handler_table);
RelocBuffer* reloc_buffer = metadata.get_reloc_buffer();
reloc_buffer->ensure_size(buffer.total_relocation_size());
size_t size = (size_t) buffer.copy_relocations_to(reloc_buffer->begin(), (CodeBuffer::csize_t) reloc_buffer->size(), true);
reloc_buffer->set_size(size);
return JVMCIEnv::ok;
}
// constructor used to create a method
JVMCIEnv::CodeInstallResult CodeInstaller::install(JVMCICompiler* compiler, Handle target, Handle compiled_code, CodeBlob*& cb, Handle installed_code, Handle speculation_log, TRAPS) {
CodeBuffer buffer("JVMCI Compiler CodeBuffer");
jobject compiled_code_obj = JNIHandles::make_local(compiled_code());
OopRecorder* recorder = new OopRecorder(&_arena, true);
initialize_dependencies(JNIHandles::resolve(compiled_code_obj), recorder, CHECK_OK);
// Get instructions and constants CodeSections early because we need it.
_instructions = buffer.insts();
_constants = buffer.consts();
initialize_fields(target(), JNIHandles::resolve(compiled_code_obj), CHECK_OK);
JVMCIEnv::CodeInstallResult result = initialize_buffer(buffer, true, CHECK_OK);
if (result != JVMCIEnv::ok) {
return result;
}
int stack_slots = _total_frame_size / HeapWordSize; // conversion to words
if (!compiled_code->is_a(HotSpotCompiledNmethod::klass())) {
oop stubName = HotSpotCompiledCode::name(compiled_code_obj);
char* name = strdup(java_lang_String::as_utf8_string(stubName));
cb = RuntimeStub::new_runtime_stub(name,
&buffer,
CodeOffsets::frame_never_safe,
stack_slots,
_debug_recorder->_oopmaps,
false);
result = JVMCIEnv::ok;
} else {
nmethod* nm = NULL;
methodHandle method = getMethodFromHotSpotMethod(HotSpotCompiledNmethod::method(compiled_code));
jint entry_bci = HotSpotCompiledNmethod::entryBCI(compiled_code);
jint id = HotSpotCompiledNmethod::id(compiled_code);
bool has_unsafe_access = HotSpotCompiledNmethod::hasUnsafeAccess(compiled_code) == JNI_TRUE;
JVMCIEnv* env = (JVMCIEnv*) (address) HotSpotCompiledNmethod::jvmciEnv(compiled_code);
if (id == -1) {
// Make sure a valid compile_id is associated with every compile
id = CompileBroker::assign_compile_id_unlocked(Thread::current(), method, entry_bci);
}
result = JVMCIEnv::register_method(method, nm, entry_bci, &_offsets, _orig_pc_offset, &buffer,
stack_slots, _debug_recorder->_oopmaps, &_exception_handler_table,
compiler, _debug_recorder, _dependencies, env, id,
has_unsafe_access, _has_wide_vector, installed_code, compiled_code, speculation_log);
cb = nm->as_codeblob_or_null();
if (nm != NULL && env == NULL) {
DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, compiler);
bool printnmethods = directive->PrintAssemblyOption || directive->PrintNMethodsOption;
if (!printnmethods && (PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers)) {
nm->print_nmethod(printnmethods);
}
DirectivesStack::release(directive);
}
}
if (cb != NULL) {
// Make sure the pre-calculated constants section size was correct.
guarantee((cb->code_begin() - cb->content_begin()) >= _constants_size, "%d < %d", (int)(cb->code_begin() - cb->content_begin()), _constants_size);
}
return result;
}
void CodeInstaller::initialize_fields(oop target, oop compiled_code, TRAPS) {
if (compiled_code->is_a(HotSpotCompiledNmethod::klass())) {
Handle hotspotJavaMethod(THREAD, HotSpotCompiledNmethod::method(compiled_code));
methodHandle method = getMethodFromHotSpotMethod(hotspotJavaMethod());
_parameter_count = method->size_of_parameters();
TRACE_jvmci_2("installing code for %s", method->name_and_sig_as_C_string());
} else {
// Must be a HotSpotCompiledRuntimeStub.
// Only used in OopMap constructor for non-product builds
_parameter_count = 0;
}
_sites_handle = JNIHandles::make_local(HotSpotCompiledCode::sites(compiled_code));
_code_handle = JNIHandles::make_local(HotSpotCompiledCode::targetCode(compiled_code));
_code_size = HotSpotCompiledCode::targetCodeSize(compiled_code);
_total_frame_size = HotSpotCompiledCode::totalFrameSize(compiled_code);
oop deoptRescueSlot = HotSpotCompiledCode::deoptRescueSlot(compiled_code);
if (deoptRescueSlot == NULL) {
_orig_pc_offset = -1;
} else {
_orig_pc_offset = StackSlot::offset(deoptRescueSlot);
if (StackSlot::addFrameSize(deoptRescueSlot)) {
_orig_pc_offset += _total_frame_size;
}
if (_orig_pc_offset < 0) {
JVMCI_ERROR("invalid deopt rescue slot: %d", _orig_pc_offset);
}
}
// Pre-calculate the constants section size. This is required for PC-relative addressing.
_data_section_handle = JNIHandles::make_local(HotSpotCompiledCode::dataSection(compiled_code));
if ((_constants->alignment() % HotSpotCompiledCode::dataSectionAlignment(compiled_code)) != 0) {
JVMCI_ERROR("invalid data section alignment: %d", HotSpotCompiledCode::dataSectionAlignment(compiled_code));
}
_constants_size = data_section()->length();
_data_section_patches_handle = JNIHandles::make_local(HotSpotCompiledCode::dataSectionPatches(compiled_code));
#ifndef PRODUCT
_comments_handle = JNIHandles::make_local(HotSpotCompiledCode::comments(compiled_code));
#endif
_next_call_type = INVOKE_INVALID;
_has_wide_vector = false;
oop arch = TargetDescription::arch(target);
_word_kind_handle = JNIHandles::make_local(Architecture::wordKind(arch));
}
int CodeInstaller::estimate_stubs_size(TRAPS) {
// Estimate the number of static and aot call stubs that might be emitted.
int static_call_stubs = 0;
int aot_call_stubs = 0;
int trampoline_stubs = 0;
objArrayOop sites = this->sites();
for (int i = 0; i < sites->length(); i++) {
oop site = sites->obj_at(i);
if (site != NULL) {
if (site->is_a(site_Mark::klass())) {
oop id_obj = site_Mark::id(site);
if (id_obj != NULL) {
if (!java_lang_boxing_object::is_instance(id_obj, T_INT)) {
JVMCI_ERROR_0("expected Integer id, got %s", id_obj->klass()->signature_name());
}
jint id = id_obj->int_field(java_lang_boxing_object::value_offset_in_bytes(T_INT));
switch (id) {
case INVOKEINTERFACE:
case INVOKEVIRTUAL:
trampoline_stubs++;
break;
case INVOKESTATIC:
case INVOKESPECIAL:
static_call_stubs++;
trampoline_stubs++;
break;
default:
break;
}
}
}
if (UseAOT && site->is_a(site_Call::klass())) {
oop target = site_Call::target(site);
InstanceKlass* target_klass = InstanceKlass::cast(target->klass());
if (!target_klass->is_subclass_of(SystemDictionary::HotSpotForeignCallTarget_klass())) {
// Add far aot trampolines.
aot_call_stubs++;
}
}
}
}
int size = static_call_stubs * CompiledStaticCall::to_interp_stub_size();
size += trampoline_stubs * CompiledStaticCall::to_trampoline_stub_size();
#if INCLUDE_AOT
size += aot_call_stubs * CompiledStaticCall::to_aot_stub_size();
#endif
return size;
}
// perform data and call relocation on the CodeBuffer
JVMCIEnv::CodeInstallResult CodeInstaller::initialize_buffer(CodeBuffer& buffer, bool check_size, TRAPS) {
HandleMark hm;
objArrayHandle sites(THREAD, this->sites());
int locs_buffer_size = sites->length() * (relocInfo::length_limit + sizeof(relocInfo));
// Allocate enough space in the stub section for the static call
// stubs. Stubs have extra relocs but they are managed by the stub
// section itself so they don't need to be accounted for in the
// locs_buffer above.
int stubs_size = estimate_stubs_size(CHECK_OK);
int total_size = align_up(_code_size, buffer.insts()->alignment()) + align_up(_constants_size, buffer.consts()->alignment()) + align_up(stubs_size, buffer.stubs()->alignment());
if (check_size && total_size > JVMCINMethodSizeLimit) {
return JVMCIEnv::code_too_large;
}
buffer.initialize(total_size, locs_buffer_size);
if (buffer.blob() == NULL) {
return JVMCIEnv::cache_full;
}
buffer.initialize_stubs_size(stubs_size);
buffer.initialize_consts_size(_constants_size);
_debug_recorder = new DebugInformationRecorder(_oop_recorder);
_debug_recorder->set_oopmaps(new OopMapSet());
buffer.initialize_oop_recorder(_oop_recorder);
// copy the constant data into the newly created CodeBuffer
address end_data = _constants->start() + _constants_size;
memcpy(_constants->start(), data_section()->base(T_BYTE), _constants_size);
_constants->set_end(end_data);
// copy the code into the newly created CodeBuffer
address end_pc = _instructions->start() + _code_size;
guarantee(_instructions->allocates2(end_pc), "initialize should have reserved enough space for all the code");
memcpy(_instructions->start(), code()->base(T_BYTE), _code_size);
_instructions->set_end(end_pc);
for (int i = 0; i < data_section_patches()->length(); i++) {
HandleMark hm(THREAD);
Handle patch(THREAD, data_section_patches()->obj_at(i));
if (patch.is_null()) {
THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
}
Handle reference(THREAD, site_DataPatch::reference(patch));
if (reference.is_null()) {
THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
}
if (!reference->is_a(site_ConstantReference::klass())) {
JVMCI_ERROR_OK("invalid patch in data section: %s", reference->klass()->signature_name());
}
Handle constant(THREAD, site_ConstantReference::constant(reference));
if (constant.is_null()) {
THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
}
address dest = _constants->start() + site_Site::pcOffset(patch);
if (constant->is_a(HotSpotMetaspaceConstantImpl::klass())) {
if (HotSpotMetaspaceConstantImpl::compressed(constant)) {
#ifdef _LP64
*((narrowKlass*) dest) = record_narrow_metadata_reference(_constants, dest, constant, CHECK_OK);
#else
JVMCI_ERROR_OK("unexpected compressed Klass* in 32-bit mode");
#endif
} else {
*((void**) dest) = record_metadata_reference(_constants, dest, constant, CHECK_OK);
}
} else if (constant->is_a(HotSpotObjectConstantImpl::klass())) {
Handle obj(THREAD, HotSpotObjectConstantImpl::object(constant));
jobject value = JNIHandles::make_local(obj());
int oop_index = _oop_recorder->find_index(value);
if (HotSpotObjectConstantImpl::compressed(constant)) {
#ifdef _LP64
_constants->relocate(dest, oop_Relocation::spec(oop_index), relocInfo::narrow_oop_in_const);
#else
JVMCI_ERROR_OK("unexpected compressed oop in 32-bit mode");
#endif
} else {
_constants->relocate(dest, oop_Relocation::spec(oop_index));
}
} else {
JVMCI_ERROR_OK("invalid constant in data section: %s", constant->klass()->signature_name());
}
}
jint last_pc_offset = -1;
for (int i = 0; i < sites->length(); i++) {
HandleMark hm(THREAD);
Handle site(THREAD, sites->obj_at(i));
if (site.is_null()) {
THROW_(vmSymbols::java_lang_NullPointerException(), JVMCIEnv::ok);
}
jint pc_offset = site_Site::pcOffset(site);
if (site->is_a(site_Call::klass())) {
TRACE_jvmci_4("call at %i", pc_offset);
site_Call(buffer, pc_offset, site, CHECK_OK);
} else if (site->is_a(site_Infopoint::klass())) {
// three reasons for infopoints denote actual safepoints
oop reason = site_Infopoint::reason(site);
if (site_InfopointReason::SAFEPOINT() == reason || site_InfopointReason::CALL() == reason || site_InfopointReason::IMPLICIT_EXCEPTION() == reason) {
TRACE_jvmci_4("safepoint at %i", pc_offset);
site_Safepoint(buffer, pc_offset, site, CHECK_OK);
if (_orig_pc_offset < 0) {
JVMCI_ERROR_OK("method contains safepoint, but has no deopt rescue slot");
}
} else {
TRACE_jvmci_4("infopoint at %i", pc_offset);
site_Infopoint(buffer, pc_offset, site, CHECK_OK);
}
} else if (site->is_a(site_DataPatch::klass())) {
TRACE_jvmci_4("datapatch at %i", pc_offset);
site_DataPatch(buffer, pc_offset, site, CHECK_OK);
} else if (site->is_a(site_Mark::klass())) {
TRACE_jvmci_4("mark at %i", pc_offset);
site_Mark(buffer, pc_offset, site, CHECK_OK);
} else if (site->is_a(site_ExceptionHandler::klass())) {
TRACE_jvmci_4("exceptionhandler at %i", pc_offset);
site_ExceptionHandler(pc_offset, site);
} else {
JVMCI_ERROR_OK("unexpected site subclass: %s", site->klass()->signature_name());
}
last_pc_offset = pc_offset;
JavaThread* thread = JavaThread::current();
if (SafepointMechanism::poll(thread)) {
// this is a hacky way to force a safepoint check but nothing else was jumping out at me.
ThreadToNativeFromVM ttnfv(thread);
}
}
#ifndef PRODUCT
if (comments() != NULL) {
for (int i = 0; i < comments()->length(); i++) {
oop comment = comments()->obj_at(i);
assert(comment->is_a(HotSpotCompiledCode_Comment::klass()), "cce");
jint offset = HotSpotCompiledCode_Comment::pcOffset(comment);
char* text = java_lang_String::as_utf8_string(HotSpotCompiledCode_Comment::text(comment));
buffer.block_comment(offset, text);
}
}
#endif
return JVMCIEnv::ok;
}
void CodeInstaller::assumption_NoFinalizableSubclass(Thread* thread, Handle assumption) {
Handle receiverType_handle (thread, Assumptions_NoFinalizableSubclass::receiverType(assumption()));
Klass* receiverType = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(receiverType_handle));
_dependencies->assert_has_no_finalizable_subclasses(receiverType);
}
void CodeInstaller::assumption_ConcreteSubtype(Thread* thread, Handle assumption) {
Handle context_handle (thread, Assumptions_ConcreteSubtype::context(assumption()));
Handle subtype_handle (thread, Assumptions_ConcreteSubtype::subtype(assumption()));
Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
Klass* subtype = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(subtype_handle));
assert(context->is_abstract(), "");
_dependencies->assert_abstract_with_unique_concrete_subtype(context, subtype);
}
void CodeInstaller::assumption_LeafType(Thread* thread, Handle assumption) {
Handle context_handle (thread, Assumptions_LeafType::context(assumption()));
Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
_dependencies->assert_leaf_type(context);
}
void CodeInstaller::assumption_ConcreteMethod(Thread* thread, Handle assumption) {
Handle impl_handle (thread, Assumptions_ConcreteMethod::impl(assumption()));
Handle context_handle (thread, Assumptions_ConcreteMethod::context(assumption()));
methodHandle impl = getMethodFromHotSpotMethod(impl_handle());
Klass* context = java_lang_Class::as_Klass(HotSpotResolvedObjectTypeImpl::javaClass(context_handle));
_dependencies->assert_unique_concrete_method(context, impl());
}
void CodeInstaller::assumption_CallSiteTargetValue(Thread* thread, Handle assumption) {
Handle callSite(thread, Assumptions_CallSiteTargetValue::callSite(assumption()));
Handle methodHandle(thread, Assumptions_CallSiteTargetValue::methodHandle(assumption()));
_dependencies->assert_call_site_target_value(callSite(), methodHandle());
}
void CodeInstaller::site_ExceptionHandler(jint pc_offset, Handle exc) {
jint handler_offset = site_ExceptionHandler::handlerPos(exc);
// Subtable header
_exception_handler_table.add_entry(HandlerTableEntry(1, pc_offset, 0));
// Subtable entry
_exception_handler_table.add_entry(HandlerTableEntry(-1, handler_offset, 0));
}
// If deoptimization happens, the interpreter should reexecute these bytecodes.
// This function mainly helps the compilers to set up the reexecute bit.
static bool bytecode_should_reexecute(Bytecodes::Code code) {
switch (code) {
case Bytecodes::_invokedynamic:
case Bytecodes::_invokevirtual:
case Bytecodes::_invokeinterface:
case Bytecodes::_invokespecial:
case Bytecodes::_invokestatic:
return false;
default:
return true;
}
return true;
}
GrowableArray<ScopeValue*>* CodeInstaller::record_virtual_objects(Handle debug_info, TRAPS) {
objArrayHandle virtualObjects(THREAD, DebugInfo::virtualObjectMapping(debug_info));
if (virtualObjects.is_null()) {
return NULL;
}
GrowableArray<ScopeValue*>* objects = new GrowableArray<ScopeValue*>(virtualObjects->length(), virtualObjects->length(), NULL);
// Create the unique ObjectValues
for (int i = 0; i < virtualObjects->length(); i++) {
HandleMark hm(THREAD);
Handle value(THREAD, virtualObjects->obj_at(i));
int id = VirtualObject::id(value);
Handle type(THREAD, VirtualObject::type(value));
oop javaMirror = HotSpotResolvedObjectTypeImpl::javaClass(type);
ObjectValue* sv = new ObjectValue(id, new ConstantOopWriteValue(JNIHandles::make_local(Thread::current(), javaMirror)));
if (id < 0 || id >= objects->length()) {
JVMCI_ERROR_NULL("virtual object id %d out of bounds", id);
}
if (objects->at(id) != NULL) {
JVMCI_ERROR_NULL("duplicate virtual object id %d", id);
}
objects->at_put(id, sv);
}
// All the values which could be referenced by the VirtualObjects
// exist, so now describe all the VirtualObjects themselves.
for (int i = 0; i < virtualObjects->length(); i++) {
HandleMark hm(THREAD);
Handle value(THREAD, virtualObjects->obj_at(i));
int id = VirtualObject::id(value);
record_object_value(objects->at(id)->as_ObjectValue(), value, objects, CHECK_NULL);
}
_debug_recorder->dump_object_pool(objects);
return objects;
}
void CodeInstaller::record_scope(jint pc_offset, Handle debug_info, ScopeMode scope_mode, bool return_oop, TRAPS) {
Handle position(THREAD, DebugInfo::bytecodePosition(debug_info));
if (position.is_null()) {
// Stubs do not record scope info, just oop maps
return;
}
GrowableArray<ScopeValue*>* objectMapping;
if (scope_mode == CodeInstaller::FullFrame) {
objectMapping = record_virtual_objects(debug_info, CHECK);
} else {
objectMapping = NULL;
}
record_scope(pc_offset, position, scope_mode, objectMapping, return_oop, CHECK);
}
void CodeInstaller::record_scope(jint pc_offset, Handle position, ScopeMode scope_mode, GrowableArray<ScopeValue*>* objects, bool return_oop, TRAPS) {
Handle frame;
if (scope_mode == CodeInstaller::FullFrame) {
if (!position->is_a(BytecodeFrame::klass())) {
JVMCI_ERROR("Full frame expected for debug info at %i", pc_offset);
}
frame = position;
}
Handle caller_frame (THREAD, BytecodePosition::caller(position));
if (caller_frame.not_null()) {
record_scope(pc_offset, caller_frame, scope_mode, objects, return_oop, CHECK);
}
Handle hotspot_method (THREAD, BytecodePosition::method(position));
Method* method = getMethodFromHotSpotMethod(hotspot_method());
jint bci = BytecodePosition::bci(position);
if (bci == BytecodeFrame::BEFORE_BCI()) {
bci = SynchronizationEntryBCI;
}
TRACE_jvmci_2("Recording scope pc_offset=%d bci=%d method=%s", pc_offset, bci, method->name_and_sig_as_C_string());
bool reexecute = false;
if (frame.not_null()) {
if (bci == SynchronizationEntryBCI){
reexecute = false;
} else {
Bytecodes::Code code = Bytecodes::java_code_at(method, method->bcp_from(bci));
reexecute = bytecode_should_reexecute(code);
if (frame.not_null()) {
reexecute = (BytecodeFrame::duringCall(frame) == JNI_FALSE);
}
}
}
DebugToken* locals_token = NULL;
DebugToken* expressions_token = NULL;
DebugToken* monitors_token = NULL;
bool throw_exception = false;
if (frame.not_null()) {
jint local_count = BytecodeFrame::numLocals(frame);
jint expression_count = BytecodeFrame::numStack(frame);
jint monitor_count = BytecodeFrame::numLocks(frame);
objArrayHandle values(THREAD, BytecodeFrame::values(frame));
objArrayHandle slotKinds(THREAD, BytecodeFrame::slotKinds(frame));
if (values.is_null() || slotKinds.is_null()) {
THROW(vmSymbols::java_lang_NullPointerException());
}
if (local_count + expression_count + monitor_count != values->length()) {
JVMCI_ERROR("unexpected values length %d in scope (%d locals, %d expressions, %d monitors)", values->length(), local_count, expression_count, monitor_count);
}
if (local_count + expression_count != slotKinds->length()) {
JVMCI_ERROR("unexpected slotKinds length %d in scope (%d locals, %d expressions)", slotKinds->length(), local_count, expression_count);
}
GrowableArray<ScopeValue*>* locals = local_count > 0 ? new GrowableArray<ScopeValue*> (local_count) : NULL;
GrowableArray<ScopeValue*>* expressions = expression_count > 0 ? new GrowableArray<ScopeValue*> (expression_count) : NULL;
GrowableArray<MonitorValue*>* monitors = monitor_count > 0 ? new GrowableArray<MonitorValue*> (monitor_count) : NULL;
TRACE_jvmci_2("Scope at bci %d with %d values", bci, values->length());
TRACE_jvmci_2("%d locals %d expressions, %d monitors", local_count, expression_count, monitor_count);
for (jint i = 0; i < values->length(); i++) {
HandleMark hm(THREAD);
ScopeValue* second = NULL;
Handle value(THREAD, values->obj_at(i));
if (i < local_count) {
BasicType type = JVMCIRuntime::kindToBasicType(Handle(THREAD, slotKinds->obj_at(i)), CHECK);
ScopeValue* first = get_scope_value(value, type, objects, second, CHECK);
if (second != NULL) {
locals->append(second);
}
locals->append(first);
} else if (i < local_count + expression_count) {
BasicType type = JVMCIRuntime::kindToBasicType(Handle(THREAD, slotKinds->obj_at(i)), CHECK);
ScopeValue* first = get_scope_value(value, type, objects, second, CHECK);
if (second != NULL) {
expressions->append(second);
}
expressions->append(first);
} else {
MonitorValue *monitor = get_monitor_value(value, objects, CHECK);
monitors->append(monitor);
}
if (second != NULL) {
i++;
if (i >= values->length() || values->obj_at(i) != Value::ILLEGAL()) {
JVMCI_ERROR("double-slot value not followed by Value.ILLEGAL");
}
}
}
locals_token = _debug_recorder->create_scope_values(locals);
expressions_token = _debug_recorder->create_scope_values(expressions);
monitors_token = _debug_recorder->create_monitor_values(monitors);
throw_exception = BytecodeFrame::rethrowException(frame) == JNI_TRUE;
}
_debug_recorder->describe_scope(pc_offset, method, NULL, bci, reexecute, throw_exception, false, return_oop,
locals_token, expressions_token, monitors_token);
}
void CodeInstaller::site_Safepoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
Handle debug_info (THREAD, site_Infopoint::debugInfo(site));
if (debug_info.is_null()) {
JVMCI_ERROR("debug info expected at safepoint at %i", pc_offset);
}
// address instruction = _instructions->start() + pc_offset;
// jint next_pc_offset = Assembler::locate_next_instruction(instruction) - _instructions->start();
OopMap *map = create_oop_map(debug_info, CHECK);
_debug_recorder->add_safepoint(pc_offset, map);
record_scope(pc_offset, debug_info, CodeInstaller::FullFrame, CHECK);
_debug_recorder->end_safepoint(pc_offset);
}
void CodeInstaller::site_Infopoint(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
Handle debug_info (THREAD, site_Infopoint::debugInfo(site));
if (debug_info.is_null()) {
JVMCI_ERROR("debug info expected at infopoint at %i", pc_offset);
}
// We'd like to check that pc_offset is greater than the
// last pc recorded with _debug_recorder (raising an exception if not)
// but DebugInformationRecorder doesn't have sufficient public API.
_debug_recorder->add_non_safepoint(pc_offset);
record_scope(pc_offset, debug_info, CodeInstaller::BytecodePosition, CHECK);
_debug_recorder->end_non_safepoint(pc_offset);
}
void CodeInstaller::site_Call(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
Handle target(THREAD, site_Call::target(site));
InstanceKlass* target_klass = InstanceKlass::cast(target->klass());
Handle hotspot_method; // JavaMethod
Handle foreign_call;
if (target_klass->is_subclass_of(SystemDictionary::HotSpotForeignCallTarget_klass())) {
foreign_call = target;
} else {
hotspot_method = target;
}
Handle debug_info (THREAD, site_Call::debugInfo(site));
assert(hotspot_method.not_null() ^ foreign_call.not_null(), "Call site needs exactly one type");
NativeInstruction* inst = nativeInstruction_at(_instructions->start() + pc_offset);
jint next_pc_offset = CodeInstaller::pd_next_offset(inst, pc_offset, hotspot_method, CHECK);
if (debug_info.not_null()) {
OopMap *map = create_oop_map(debug_info, CHECK);
_debug_recorder->add_safepoint(next_pc_offset, map);
bool return_oop = hotspot_method.not_null() && getMethodFromHotSpotMethod(hotspot_method())->is_returning_oop();
record_scope(next_pc_offset, debug_info, CodeInstaller::FullFrame, return_oop, CHECK);
}
if (foreign_call.not_null()) {
jlong foreign_call_destination = HotSpotForeignCallTarget::address(foreign_call);
if (_immutable_pic_compilation) {
// Use fake short distance during PIC compilation.
foreign_call_destination = (jlong)(_instructions->start() + pc_offset);
}
CodeInstaller::pd_relocate_ForeignCall(inst, foreign_call_destination, CHECK);
} else { // method != NULL
if (debug_info.is_null()) {
JVMCI_ERROR("debug info expected at call at %i", pc_offset);
}
TRACE_jvmci_3("method call");
CodeInstaller::pd_relocate_JavaMethod(buffer, hotspot_method, pc_offset, CHECK);
if (_next_call_type == INVOKESTATIC || _next_call_type == INVOKESPECIAL) {
// Need a static call stub for transitions from compiled to interpreted.
CompiledStaticCall::emit_to_interp_stub(buffer, _instructions->start() + pc_offset);
}
#if INCLUDE_AOT
// Trampoline to far aot code.
CompiledStaticCall::emit_to_aot_stub(buffer, _instructions->start() + pc_offset);
#endif
}
_next_call_type = INVOKE_INVALID;
if (debug_info.not_null()) {
_debug_recorder->end_safepoint(next_pc_offset);
}
}
void CodeInstaller::site_DataPatch(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
Handle reference(THREAD, site_DataPatch::reference(site));
if (reference.is_null()) {
THROW(vmSymbols::java_lang_NullPointerException());
} else if (reference->is_a(site_ConstantReference::klass())) {
Handle constant(THREAD, site_ConstantReference::constant(reference));
if (constant.is_null()) {
THROW(vmSymbols::java_lang_NullPointerException());
} else if (constant->is_a(HotSpotObjectConstantImpl::klass())) {
if (!_immutable_pic_compilation) {
// Do not patch during PIC compilation.
pd_patch_OopConstant(pc_offset, constant, CHECK);
}
} else if (constant->is_a(HotSpotMetaspaceConstantImpl::klass())) {
if (!_immutable_pic_compilation) {
pd_patch_MetaspaceConstant(pc_offset, constant, CHECK);
}
} else if (constant->is_a(HotSpotSentinelConstant::klass())) {
if (!_immutable_pic_compilation) {
JVMCI_ERROR("sentinel constant not supported for normal compiles: %s", constant->klass()->signature_name());
}
} else {
JVMCI_ERROR("unknown constant type in data patch: %s", constant->klass()->signature_name());
}
} else if (reference->is_a(site_DataSectionReference::klass())) {
int data_offset = site_DataSectionReference::offset(reference);
if (0 <= data_offset && data_offset < _constants_size) {
pd_patch_DataSectionReference(pc_offset, data_offset, CHECK);
} else {
JVMCI_ERROR("data offset 0x%X points outside data section (size 0x%X)", data_offset, _constants_size);
}
} else {
JVMCI_ERROR("unknown data patch type: %s", reference->klass()->signature_name());
}
}
void CodeInstaller::site_Mark(CodeBuffer& buffer, jint pc_offset, Handle site, TRAPS) {
Handle id_obj (THREAD, site_Mark::id(site));
if (id_obj.not_null()) {
if (!java_lang_boxing_object::is_instance(id_obj(), T_INT)) {
JVMCI_ERROR("expected Integer id, got %s", id_obj->klass()->signature_name());
}
jint id = id_obj->int_field(java_lang_boxing_object::value_offset_in_bytes(T_INT));
address pc = _instructions->start() + pc_offset;
switch (id) {
case UNVERIFIED_ENTRY:
_offsets.set_value(CodeOffsets::Entry, pc_offset);
break;
case VERIFIED_ENTRY:
_offsets.set_value(CodeOffsets::Verified_Entry, pc_offset);
break;
case OSR_ENTRY:
_offsets.set_value(CodeOffsets::OSR_Entry, pc_offset);
break;
case EXCEPTION_HANDLER_ENTRY:
_offsets.set_value(CodeOffsets::Exceptions, pc_offset);
break;
case DEOPT_HANDLER_ENTRY:
_offsets.set_value(CodeOffsets::Deopt, pc_offset);
break;
case INVOKEVIRTUAL:
case INVOKEINTERFACE:
case INLINE_INVOKE:
case INVOKESTATIC:
case INVOKESPECIAL:
_next_call_type = (MarkId) id;
_invoke_mark_pc = pc;
break;
case POLL_NEAR:
case POLL_FAR:
case POLL_RETURN_NEAR:
case POLL_RETURN_FAR:
pd_relocate_poll(pc, id, CHECK);
break;
case CARD_TABLE_SHIFT:
case CARD_TABLE_ADDRESS:
case HEAP_TOP_ADDRESS:
case HEAP_END_ADDRESS:
case NARROW_KLASS_BASE_ADDRESS:
case NARROW_OOP_BASE_ADDRESS:
case CRC_TABLE_ADDRESS:
case LOG_OF_HEAP_REGION_GRAIN_BYTES:
case INLINE_CONTIGUOUS_ALLOCATION_SUPPORTED:
break;
default:
JVMCI_ERROR("invalid mark id: %d", id);
break;
}
}
}