codeBlob.cpp

/*
 * Copyright (c) 1998, 2025, 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"code/codeBlob.hpp"
#include"code/codeCache.hpp"
#include"code/relocInfo.hpp"
#include"code/vtableStubs.hpp"
#include"compiler/disassembler.hpp"
#include"compiler/oopMap.hpp"
#include"interpreter/bytecode.hpp"
#include"interpreter/interpreter.hpp"
#include"jvm.h"
#include"memory/allocation.inline.hpp"
#include"memory/heap.hpp"
#include"memory/resourceArea.hpp"
#include"oops/oop.inline.hpp"
#include"prims/forte.hpp"
#include"prims/jvmtiExport.hpp"
#include"runtime/handles.inline.hpp"
#include"runtime/interfaceSupport.inline.hpp"
#include"runtime/javaFrameAnchor.hpp"
#include"runtime/jniHandles.inline.hpp"
#include"runtime/mutexLocker.hpp"
#include"runtime/safepoint.hpp"
#include"runtime/sharedRuntime.hpp"
#include"runtime/stubCodeGenerator.hpp"
#include"runtime/stubRoutines.hpp"
#include"runtime/vframe.hpp"
#include"services/memoryService.hpp"
#include"utilities/align.hpp"
#ifdef COMPILER1
#include"c1/c1_Runtime1.hpp"
#endif

#include<type_traits>

// Virtual methods are not allowed in code blobs to simplify caching compiled code.
// Check all "leaf" subclasses of CodeBlob class.

static_assert(!std::is_polymorphic<nmethod>::value, "no virtual methods are allowed in nmethod");
static_assert(!std::is_polymorphic<AdapterBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<VtableBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<MethodHandlesAdapterBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<RuntimeStub>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<DeoptimizationBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<SafepointBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<UpcallStub>::value, "no virtual methods are allowed in code blobs");
#ifdef COMPILER2
static_assert(!std::is_polymorphic<ExceptionBlob>::value, "no virtual methods are allowed in code blobs");
static_assert(!std::is_polymorphic<UncommonTrapBlob>::value, "no virtual methods are allowed in code blobs");
#endif

// Add proxy vtables.
// We need only few for now - they are used only from prints.
const nmethod::Vptr nmethod::_vpntr;
const BufferBlob::Vptr BufferBlob::_vpntr;
const RuntimeStub::Vptr RuntimeStub::_vpntr;
const SingletonBlob::Vptr SingletonBlob::_vpntr;
const DeoptimizationBlob::Vptr DeoptimizationBlob::_vpntr;
const UpcallStub::Vptr UpcallStub::_vpntr;

const CodeBlob::Vptr* CodeBlob::vptr() const {
constexprconst CodeBlob::Vptr* array[(size_t)CodeBlobKind::Number_Of_Kinds] = {
nullptr/* None */,
 &nmethod::_vpntr,
 &BufferBlob::_vpntr,
 &AdapterBlob::_vpntr,
 &VtableBlob::_vpntr,
 &MethodHandlesAdapterBlob::_vpntr,
 &RuntimeStub::_vpntr,
 &DeoptimizationBlob::_vpntr,
 &SafepointBlob::_vpntr,
#ifdef COMPILER2
 &ExceptionBlob::_vpntr,
 &UncommonTrapBlob::_vpntr,
#endif
 &UpcallStub::_vpntr
 };

return array[(size_t)_kind];
}

unsignedintCodeBlob::align_code_offset(int offset) {
// align the size to CodeEntryAlignment
int header_size = (int)CodeHeap::header_size();
returnalign_up(offset + header_size, CodeEntryAlignment) - header_size;
}

// This must be consistent with the CodeBlob constructor's layout actions.
unsignedintCodeBlob::allocation_size(CodeBuffer* cb, int header_size) {
// align the size to CodeEntryAlignment
unsignedint size = align_code_offset(header_size);
 size += align_up(cb->total_content_size(), oopSize);
 size += align_up(cb->total_oop_size(), oopSize);
return size;
}

CodeBlob::CodeBlob(constchar* name, CodeBlobKind kind, CodeBuffer* cb, int size, uint16_t header_size,
int16_t frame_complete_offset, int frame_size, OopMapSet* oop_maps, bool caller_must_gc_arguments,
int mutable_data_size) :
 _oop_maps(nullptr), // will be set by set_oop_maps() call
 _name(name),
 _mutable_data(header_begin() + size), // default value is blob_end()
 _size(size),
 _relocation_size(align_up(cb->total_relocation_size(), oopSize)),
 _content_offset(CodeBlob::align_code_offset(header_size)),
 _code_offset(_content_offset + cb->total_offset_of(cb->insts())),
 _data_offset(_content_offset + align_up(cb->total_content_size(), oopSize)),
 _frame_size(frame_size),
 _mutable_data_size(mutable_data_size),
 S390_ONLY(_ctable_offset(0) COMMA)
 _header_size(header_size),
 _frame_complete_offset(frame_complete_offset),
 _kind(kind),
 _caller_must_gc_arguments(caller_must_gc_arguments)
{
assert(is_aligned(_size, oopSize), "unaligned size");
assert(is_aligned(header_size, oopSize), "unaligned size");
assert(is_aligned(_relocation_size, oopSize), "unaligned size");
assert(_data_offset <= _size, "codeBlob is too small: %d > %d", _data_offset, _size);
assert(is_nmethod() || (cb->total_oop_size() + cb->total_metadata_size() == 0), "must be nmethod");
assert(code_end() == content_end(), "must be the same - see code_end()");
#ifdef COMPILER1
// probably wrong for tiered
assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");
#endif// COMPILER1

if (_mutable_data_size > 0) {
 _mutable_data = (address)os::malloc(_mutable_data_size, mtCode);
if (_mutable_data == nullptr) {
vm_exit_out_of_memory(_mutable_data_size, OOM_MALLOC_ERROR, "codebuffer: no space for mutable data");
 }
 } else {
// We need unique and valid not null address
assert(_mutable_data = blob_end(), "sanity");
 }

set_oop_maps(oop_maps);
}

// Simple CodeBlob used for simple BufferBlob.
CodeBlob::CodeBlob(constchar* name, CodeBlobKind kind, int size, uint16_t header_size) :
 _oop_maps(nullptr),
 _name(name),
 _mutable_data(header_begin() + size), // default value is blob_end()
 _size(size),
 _relocation_size(0),
 _content_offset(CodeBlob::align_code_offset(header_size)),
 _code_offset(_content_offset),
 _data_offset(size),
 _frame_size(0),
 S390_ONLY(_ctable_offset(0) COMMA)
 _header_size(header_size),
 _frame_complete_offset(CodeOffsets::frame_never_safe),
 _kind(kind),
 _caller_must_gc_arguments(false)
{
assert(is_aligned(size, oopSize), "unaligned size");
assert(is_aligned(header_size, oopSize), "unaligned size");
assert(_mutable_data = blob_end(), "sanity");
}

voidCodeBlob::purge() {
assert(_mutable_data != nullptr, "should never be null");
if (_mutable_data != blob_end()) {
os::free(_mutable_data);
 _mutable_data = blob_end(); // Valid not null address
 }
if (_oop_maps != nullptr) {
delete _oop_maps;
 _oop_maps = nullptr;
 }
NOT_PRODUCT(_asm_remarks.clear());
NOT_PRODUCT(_dbg_strings.clear());
}

voidCodeBlob::set_oop_maps(OopMapSet* p) {
// Danger Will Robinson! This method allocates a big
// chunk of memory, its your job to free it.
if (p != nullptr) {
 _oop_maps = ImmutableOopMapSet::build_from(p);
 } else {
 _oop_maps = nullptr;
 }
}

const ImmutableOopMap* CodeBlob::oop_map_for_return_address(address return_address) const {
assert(_oop_maps != nullptr, "nope");
return _oop_maps->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());
}

voidCodeBlob::print_code_on(outputStream* st) {
 ResourceMark m;
Disassembler::decode(this, st);
}

//-----------------------------------------------------------------------------------------
// Creates a RuntimeBlob from a CodeBuffer and copy code and relocation info.

RuntimeBlob::RuntimeBlob(
constchar* name,
 CodeBlobKind kind,
 CodeBuffer* cb,
int size,
uint16_t header_size,
int16_t frame_complete,
int frame_size,
 OopMapSet* oop_maps,
bool caller_must_gc_arguments)
 : CodeBlob(name, kind, cb, size, header_size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments,
align_up(cb->total_relocation_size(), oopSize))
{
 cb->copy_code_and_locs_to(this);
}

voidRuntimeBlob::free(RuntimeBlob* blob) {
assert(blob != nullptr, "caller must check for nullptr");
 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
 blob->purge();
 {
 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
CodeCache::free(blob);
 }
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
}

voidRuntimeBlob::trace_new_stub(RuntimeBlob* stub, constchar* name1, constchar* name2) {
// Do not hold the CodeCache lock during name formatting.
assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");

if (stub != nullptr && (PrintStubCode ||
Forte::is_enabled() ||
JvmtiExport::should_post_dynamic_code_generated())) {
char stub_id[256];
assert(strlen(name1) + strlen(name2) < sizeof(stub_id), "");
jio_snprintf(stub_id, sizeof(stub_id), "%s%s", name1, name2);
if (PrintStubCode) {
 ttyLocker ttyl;
 tty->print_cr("- - - [BEGIN] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
 tty->print_cr("Decoding %s " PTR_FORMAT " [" PTR_FORMAT ", " PTR_FORMAT "] (%d bytes)",
 stub_id, p2i(stub), p2i(stub->code_begin()), p2i(stub->code_end()), stub->code_size());
Disassembler::decode(stub->code_begin(), stub->code_end(), tty
NOT_PRODUCT(COMMA &stub->asm_remarks()));
if ((stub->oop_maps() != nullptr) && AbstractDisassembler::show_structs()) {
 tty->print_cr("- - - [OOP MAPS]- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
 stub->oop_maps()->print();
 }
 tty->print_cr("- - - [END] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
 tty->cr();
 }
if (Forte::is_enabled()) {
Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());
 }

if (JvmtiExport::should_post_dynamic_code_generated()) {
constchar* stub_name = name2;
if (name2[0] == '\0') stub_name = name1;
JvmtiExport::post_dynamic_code_generated(stub_name, stub->code_begin(), stub->code_end());
 }
 }

// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();
}

//----------------------------------------------------------------------------------------------------
// Implementation of BufferBlob

BufferBlob::BufferBlob(constchar* name, CodeBlobKind kind, int size)
: RuntimeBlob(name, kind, size, sizeof(BufferBlob))
{}

BufferBlob* BufferBlob::create(constchar* name, uint buffer_size) {
 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock

 BufferBlob* blob = nullptr;
unsignedint size = sizeof(BufferBlob);
// align the size to CodeEntryAlignment
 size = CodeBlob::align_code_offset(size);
 size += align_up(buffer_size, oopSize);
assert(name != nullptr, "must provide a name");
 {
 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, size);
 }
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();

return blob;
}


BufferBlob::BufferBlob(constchar* name, CodeBlobKind kind, CodeBuffer* cb, int size)
 : RuntimeBlob(name, kind, cb, size, sizeof(BufferBlob), CodeOffsets::frame_never_safe, 0, nullptr)
{}

// Used by gtest
BufferBlob* BufferBlob::create(constchar* name, CodeBuffer* cb) {
 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock

 BufferBlob* blob = nullptr;
unsignedint size = CodeBlob::allocation_size(cb, sizeof(BufferBlob));
assert(name != nullptr, "must provide a name");
 {
 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 blob = new (size) BufferBlob(name, CodeBlobKind::Buffer, cb, size);
 }
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();

return blob;
}

void* BufferBlob::operatornew(size_t s, unsigned size) throw() {
returnCodeCache::allocate(size, CodeBlobType::NonNMethod);
}

voidBufferBlob::free(BufferBlob *blob) {
RuntimeBlob::free(blob);
}


//----------------------------------------------------------------------------------------------------
// Implementation of AdapterBlob

AdapterBlob::AdapterBlob(int size, CodeBuffer* cb) :
 BufferBlob("I2C/C2I adapters", CodeBlobKind::Adapter, cb, size) {
CodeCache::commit(this);
}

AdapterBlob* AdapterBlob::create(CodeBuffer* cb) {
 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock

CodeCache::gc_on_allocation();

 AdapterBlob* blob = nullptr;
unsignedint size = CodeBlob::allocation_size(cb, sizeof(AdapterBlob));
 {
 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 blob = new (size) AdapterBlob(size, cb);
 }
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();

return blob;
}

//----------------------------------------------------------------------------------------------------
// Implementation of VtableBlob

void* VtableBlob::operatornew(size_t s, unsigned size) throw() {
// Handling of allocation failure stops compilation and prints a bunch of
// stuff, which requires unlocking the CodeCache_lock, so that the Compile_lock
// can be locked, and then re-locking the CodeCache_lock. That is not safe in
// this context as we hold the CompiledICLocker. So we just don't handle code
// cache exhaustion here; we leave that for a later allocation that does not
// hold the CompiledICLocker.
returnCodeCache::allocate(size, CodeBlobType::NonNMethod, false/* handle_alloc_failure */);
}

VtableBlob::VtableBlob(constchar* name, int size) :
 BufferBlob(name, CodeBlobKind::Vtable, size) {
}

VtableBlob* VtableBlob::create(constchar* name, int buffer_size) {
assert(JavaThread::current()->thread_state() == _thread_in_vm, "called with the wrong state");

 VtableBlob* blob = nullptr;
unsignedint size = sizeof(VtableBlob);
// align the size to CodeEntryAlignment
 size = align_code_offset(size);
 size += align_up(buffer_size, oopSize);
assert(name != nullptr, "must provide a name");
 {
if (!CodeCache_lock->try_lock()) {
// If we can't take the CodeCache_lock, then this is a bad time to perform the ongoing
// IC transition to megamorphic, for which this stub will be needed. It is better to
// bail out the transition, and wait for a more opportune moment. Not only is it not
// worth waiting for the lock blockingly for the megamorphic transition, it might
// also result in a deadlock to blockingly wait, when concurrent class unloading is
// performed. At this point in time, the CompiledICLocker is taken, so we are not
// allowed to blockingly wait for the CodeCache_lock, as these two locks are otherwise
// consistently taken in the opposite order. Bailing out results in an IC transition to
// the clean state instead, which will cause subsequent calls to retry the transitioning
// eventually.
returnnullptr;
 }
 blob = new (size) VtableBlob(name, size);
 CodeCache_lock->unlock();
 }
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();

return blob;
}

//----------------------------------------------------------------------------------------------------
// Implementation of MethodHandlesAdapterBlob

MethodHandlesAdapterBlob* MethodHandlesAdapterBlob::create(int buffer_size) {
 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock

 MethodHandlesAdapterBlob* blob = nullptr;
unsignedint size = sizeof(MethodHandlesAdapterBlob);
// align the size to CodeEntryAlignment
 size = CodeBlob::align_code_offset(size);
 size += align_up(buffer_size, oopSize);
 {
 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 blob = new (size) MethodHandlesAdapterBlob(size);
if (blob == nullptr) {
vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "CodeCache: no room for method handle adapter blob");
 }
 }
// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();

return blob;
}

//----------------------------------------------------------------------------------------------------
// Implementation of RuntimeStub

RuntimeStub::RuntimeStub(
constchar* name,
 CodeBuffer* cb,
int size,
int16_t frame_complete,
int frame_size,
 OopMapSet* oop_maps,
bool caller_must_gc_arguments
)
: RuntimeBlob(name, CodeBlobKind::RuntimeStub, cb, size, sizeof(RuntimeStub),
 frame_complete, frame_size, oop_maps, caller_must_gc_arguments)
{
}

RuntimeStub* RuntimeStub::new_runtime_stub(constchar* stub_name,
 CodeBuffer* cb,
int16_t frame_complete,
int frame_size,
 OopMapSet* oop_maps,
bool caller_must_gc_arguments,
bool alloc_fail_is_fatal)
{
 RuntimeStub* stub = nullptr;
unsignedint size = CodeBlob::allocation_size(cb, sizeof(RuntimeStub));
 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
 {
 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);
if (stub == nullptr) {
if (!alloc_fail_is_fatal) {
returnnullptr;
 }
fatal("Initial size of CodeCache is too small");
 }
 }

trace_new_stub(stub, "RuntimeStub - ", stub_name);

return stub;
}


void* RuntimeStub::operatornew(size_t s, unsigned size) throw() {
returnCodeCache::allocate(size, CodeBlobType::NonNMethod);
}

// operator new shared by all singletons:
void* SingletonBlob::operatornew(size_t s, unsigned size, bool alloc_fail_is_fatal) throw() {
void* p = CodeCache::allocate(size, CodeBlobType::NonNMethod);
if (alloc_fail_is_fatal && !p) fatal("Initial size of CodeCache is too small");
return p;
}


//----------------------------------------------------------------------------------------------------
// Implementation of DeoptimizationBlob

DeoptimizationBlob::DeoptimizationBlob(
 CodeBuffer* cb,
int size,
 OopMapSet* oop_maps,
int unpack_offset,
int unpack_with_exception_offset,
int unpack_with_reexecution_offset,
int frame_size
)
: SingletonBlob("DeoptimizationBlob", CodeBlobKind::Deoptimization, cb,
 size, sizeof(DeoptimizationBlob), frame_size, oop_maps)
{
 _unpack_offset = unpack_offset;
 _unpack_with_exception = unpack_with_exception_offset;
 _unpack_with_reexecution = unpack_with_reexecution_offset;
#ifdef COMPILER1
 _unpack_with_exception_in_tls = -1;
#endif
}


DeoptimizationBlob* DeoptimizationBlob::create(
 CodeBuffer* cb,
 OopMapSet* oop_maps,
int unpack_offset,
int unpack_with_exception_offset,
int unpack_with_reexecution_offset,
int frame_size)
{
 DeoptimizationBlob* blob = nullptr;
unsignedint size = CodeBlob::allocation_size(cb, sizeof(DeoptimizationBlob));
 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
 {
 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 blob = new (size) DeoptimizationBlob(cb,
 size,
 oop_maps,
 unpack_offset,
 unpack_with_exception_offset,
 unpack_with_reexecution_offset,
 frame_size);
 }

trace_new_stub(blob, "DeoptimizationBlob");

return blob;
}

#ifdef COMPILER2

//----------------------------------------------------------------------------------------------------
// Implementation of UncommonTrapBlob

UncommonTrapBlob::UncommonTrapBlob(
 CodeBuffer* cb,
int size,
 OopMapSet* oop_maps,
int frame_size
)
: SingletonBlob("UncommonTrapBlob", CodeBlobKind::UncommonTrap, cb,
 size, sizeof(UncommonTrapBlob), frame_size, oop_maps)
{}


UncommonTrapBlob* UncommonTrapBlob::create(
 CodeBuffer* cb,
 OopMapSet* oop_maps,
int frame_size)
{
 UncommonTrapBlob* blob = nullptr;
unsignedint size = CodeBlob::allocation_size(cb, sizeof(UncommonTrapBlob));
 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
 {
 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 blob = new (size, false) UncommonTrapBlob(cb, size, oop_maps, frame_size);
 }

trace_new_stub(blob, "UncommonTrapBlob");

return blob;
}

//----------------------------------------------------------------------------------------------------
// Implementation of ExceptionBlob

ExceptionBlob::ExceptionBlob(
 CodeBuffer* cb,
int size,
 OopMapSet* oop_maps,
int frame_size
)
: SingletonBlob("ExceptionBlob", CodeBlobKind::Exception, cb,
 size, sizeof(ExceptionBlob), frame_size, oop_maps)
{}


ExceptionBlob* ExceptionBlob::create(
 CodeBuffer* cb,
 OopMapSet* oop_maps,
int frame_size)
{
 ExceptionBlob* blob = nullptr;
unsignedint size = CodeBlob::allocation_size(cb, sizeof(ExceptionBlob));
 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
 {
 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 blob = new (size, false) ExceptionBlob(cb, size, oop_maps, frame_size);
 }

trace_new_stub(blob, "ExceptionBlob");

return blob;
}

#endif// COMPILER2

//----------------------------------------------------------------------------------------------------
// Implementation of SafepointBlob

SafepointBlob::SafepointBlob(
 CodeBuffer* cb,
int size,
 OopMapSet* oop_maps,
int frame_size
)
: SingletonBlob("SafepointBlob", CodeBlobKind::Safepoint, cb,
 size, sizeof(SafepointBlob), frame_size, oop_maps)
{}


SafepointBlob* SafepointBlob::create(
 CodeBuffer* cb,
 OopMapSet* oop_maps,
int frame_size)
{
 SafepointBlob* blob = nullptr;
unsignedint size = CodeBlob::allocation_size(cb, sizeof(SafepointBlob));
 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock
 {
 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);
 }

trace_new_stub(blob, "SafepointBlob");

return blob;
}

//----------------------------------------------------------------------------------------------------
// Implementation of UpcallStub

UpcallStub::UpcallStub(constchar* name, CodeBuffer* cb, int size, jobject receiver, ByteSize frame_data_offset) :
 RuntimeBlob(name, CodeBlobKind::Upcall, cb, size, sizeof(UpcallStub),
 CodeOffsets::frame_never_safe, 0 /* no frame size */,
/* oop maps = */ nullptr, /* caller must gc arguments = */ false),
 _receiver(receiver),
 _frame_data_offset(frame_data_offset)
{
CodeCache::commit(this);
}

void* UpcallStub::operatornew(size_t s, unsigned size) throw() {
returnCodeCache::allocate(size, CodeBlobType::NonNMethod);
}

UpcallStub* UpcallStub::create(constchar* name, CodeBuffer* cb, jobject receiver, ByteSize frame_data_offset) {
 ThreadInVMfromUnknown __tiv; // get to VM state in case we block on CodeCache_lock

 UpcallStub* blob = nullptr;
unsignedint size = CodeBlob::allocation_size(cb, sizeof(UpcallStub));
 {
 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 blob = new (size) UpcallStub(name, cb, size, receiver, frame_data_offset);
 }
if (blob == nullptr) {
returnnullptr; // caller must handle this
 }

// Track memory usage statistic after releasing CodeCache_lock
MemoryService::track_code_cache_memory_usage();

trace_new_stub(blob, "UpcallStub - ", name);

return blob;
}

voidUpcallStub::oops_do(OopClosure* f, const frame& frame) {
frame_data_for_frame(frame)->old_handles->oops_do(f);
}

JavaFrameAnchor* UpcallStub::jfa_for_frame(const frame& frame) const {
return &frame_data_for_frame(frame)->jfa;
}

voidUpcallStub::free(UpcallStub* blob) {
assert(blob != nullptr, "caller must check for nullptr");
JNIHandles::destroy_global(blob->receiver());
RuntimeBlob::free(blob);
}

//----------------------------------------------------------------------------------------------------
// Verification and printing

voidCodeBlob::verify() {
if (is_nmethod()) {
as_nmethod()->verify();
 }
}

voidCodeBlob::print_on(outputStream* st) const {
vptr()->print_on(this, st);
}

voidCodeBlob::print() const { print_on(tty); }

voidCodeBlob::print_value_on(outputStream* st) const {
vptr()->print_value_on(this, st);
}

voidCodeBlob::print_on_impl(outputStream* st) const {
 st->print_cr("[CodeBlob (" INTPTR_FORMAT ")]", p2i(this));
 st->print_cr("Framesize: %d", _frame_size);
}

voidCodeBlob::print_value_on_impl(outputStream* st) const {
 st->print_cr("[CodeBlob]");
}

voidCodeBlob::print_block_comment(outputStream* stream, address block_begin) const {
#if defined(SUPPORT_ASSEMBLY) || defined(SUPPORT_ABSTRACT_ASSEMBLY)
if (is_nmethod()) {
as_nmethod()->print_nmethod_labels(stream, block_begin);
 }
#endif

#ifndef PRODUCT
ptrdiff_t offset = block_begin - code_begin();
assert(offset >= 0, "Expecting non-negative offset!");
 _asm_remarks.print(uint(offset), stream);
#endif
 }

voidCodeBlob::dump_for_addr(address addr, outputStream* st, bool verbose) const {
if (is_buffer_blob() || is_adapter_blob() || is_vtable_blob() || is_method_handles_adapter_blob()) {
// the interpreter is generated into a buffer blob
 InterpreterCodelet* i = Interpreter::codelet_containing(addr);
if (i != nullptr) {
 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an Interpreter codelet", p2i(addr), (int)(addr - i->code_begin()));
 i->print_on(st);
return;
 }
if (Interpreter::contains(addr)) {
 st->print_cr(INTPTR_FORMAT " is pointing into interpreter code"
" (not bytecode specific)", p2i(addr));
return;
 }
//
if (AdapterHandlerLibrary::contains(this)) {
 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in an AdapterHandler", p2i(addr), (int)(addr - code_begin()));
AdapterHandlerLibrary::print_handler_on(st, this);
 }
// the stubroutines are generated into a buffer blob
 StubCodeDesc* d = StubCodeDesc::desc_for(addr);
if (d != nullptr) {
 st->print_cr(INTPTR_FORMAT " is at begin+%d in a stub", p2i(addr), (int)(addr - d->begin()));
 d->print_on(st);
 st->cr();
return;
 }
if (StubRoutines::contains(addr)) {
 st->print_cr(INTPTR_FORMAT " is pointing to an (unnamed) stub routine", p2i(addr));
return;
 }
 VtableStub* v = VtableStubs::stub_containing(addr);
if (v != nullptr) {
 st->print_cr(INTPTR_FORMAT " is at entry_point+%d in a vtable stub", p2i(addr), (int)(addr - v->entry_point()));
 v->print_on(st);
 st->cr();
return;
 }
 }
if (is_nmethod()) {
 nmethod* nm = (nmethod*)this;
 ResourceMark rm;
 st->print(INTPTR_FORMAT " is at entry_point+%d in (nmethod*)" INTPTR_FORMAT,
p2i(addr), (int)(addr - nm->entry_point()), p2i(nm));
if (verbose) {
 st->print(" for ");
 nm->method()->print_value_on(st);
 }
 st->cr();
if (verbose && st == tty) {
// verbose is only ever true when called from findpc in debug.cpp
 nm->print_nmethod(true);
 } else {
 nm->print_on(st);
 }
return;
 }
 st->print_cr(INTPTR_FORMAT " is at code_begin+%d in ", p2i(addr), (int)(addr - code_begin()));
print_on(st);
}

voidBufferBlob::print_on_impl(outputStream* st) const {
RuntimeBlob::print_on_impl(st);
print_value_on_impl(st);
}

voidBufferBlob::print_value_on_impl(outputStream* st) const {
 st->print_cr("BufferBlob (" INTPTR_FORMAT ") used for %s", p2i(this), name());
}

voidRuntimeStub::print_on_impl(outputStream* st) const {
 ttyLocker ttyl;
RuntimeBlob::print_on_impl(st);
 st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));
 st->print_cr("%s", name());
Disassembler::decode((RuntimeBlob*)this, st);
}

voidRuntimeStub::print_value_on_impl(outputStream* st) const {
 st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());
}

voidSingletonBlob::print_on_impl(outputStream* st) const {
 ttyLocker ttyl;
RuntimeBlob::print_on_impl(st);
 st->print_cr("%s", name());
Disassembler::decode((RuntimeBlob*)this, st);
}

voidSingletonBlob::print_value_on_impl(outputStream* st) const {
 st->print_cr("%s", name());
}

voidDeoptimizationBlob::print_value_on_impl(outputStream* st) const {
 st->print_cr("Deoptimization (frame not available)");
}

voidUpcallStub::print_on_impl(outputStream* st) const {
RuntimeBlob::print_on_impl(st);
print_value_on_impl(st);
 st->print_cr("Frame data offset: %d", (int) _frame_data_offset);
 oop recv = JNIHandles::resolve(_receiver);
 st->print("Receiver MH=");
 recv->print_on(st);
Disassembler::decode((RuntimeBlob*)this, st);
}

voidUpcallStub::print_value_on_impl(outputStream* st) const {
 st->print_cr("UpcallStub (" INTPTR_FORMAT ") used for %s", p2i(this), name());
}