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 /*

  * Copyright (c) 1998, 2018, 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.

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  */

 #include "precompiled.hpp"

 #include "code/codeBlob.hpp"

 #include "code/codeCache.hpp"

 #include "code/relocInfo.hpp"

 #include "compiler/disassembler.hpp"

 #include "interpreter/bytecode.hpp"

 #include "memory/allocation.inline.hpp"

 #include "memory/heap.hpp"

 #include "oops/oop.inline.hpp"

 #include "prims/forte.hpp"

 #include "runtime/handles.inline.hpp"

 #include "runtime/interfaceSupport.hpp"

 #include "runtime/mutexLocker.hpp"

 #include "runtime/safepoint.hpp"

 #include "runtime/sharedRuntime.hpp"

 #include "runtime/vframe.hpp"

 #include "services/memoryService.hpp"

 #ifdef TARGET_ARCH_x86

 # include "nativeInst_x86.hpp"

 #endif

 #ifdef TARGET_ARCH_sparc

 # include "nativeInst_sparc.hpp"

 #endif

 #ifdef TARGET_ARCH_zero

 # include "nativeInst_zero.hpp"

 #endif

 #ifdef TARGET_ARCH_arm

 # include "nativeInst_arm.hpp"

 #endif

 #ifdef TARGET_ARCH_ppc

 # include "nativeInst_ppc.hpp"

 #endif

 #ifdef COMPILER1

 #include "c1/c1_Runtime1.hpp"

 #endif

 unsigned int align_code_offset(int offset) {

   // align the size to CodeEntryAlignment

   return

     ((offset + (int)CodeHeap::header_size() + (CodeEntryAlignment-1)) & ~(CodeEntryAlignment-1))

     - (int)CodeHeap::header_size();

 }

 // This must be consistent with the CodeBlob constructor's layout actions.

 unsigned int CodeBlob::allocation_size(CodeBuffer* cb, int header_size) {

   unsigned int size = header_size;

   size += round_to(cb->total_relocation_size(), oopSize);

   // align the size to CodeEntryAlignment

   size = align_code_offset(size);

   size += round_to(cb->total_content_size(), oopSize);

   size += round_to(cb->total_oop_size(), oopSize);

   size += round_to(cb->total_metadata_size(), oopSize);

   return size;

 }

 // Creates a simple CodeBlob. Sets up the size of the different regions.

 CodeBlob::CodeBlob(const char* name, int header_size, int size, int frame_complete, int locs_size) {

   assert(size        == round_to(size,        oopSize), "unaligned size");

   assert(locs_size   == round_to(locs_size,   oopSize), "unaligned size");

   assert(header_size == round_to(header_size, oopSize), "unaligned size");

   assert(!UseRelocIndex, "no space allocated for reloc index yet");

   // Note: If UseRelocIndex is enabled, there needs to be (at least) one

   //       extra word for the relocation information, containing the reloc

   //       index table length. Unfortunately, the reloc index table imple-

   //       mentation is not easily understandable and thus it is not clear

   //       what exactly the format is supposed to be. For now, we just turn

   //       off the use of this table (gri 7/6/2000).

   _name                  = name;

   _size                  = size;

   _frame_complete_offset = frame_complete;

   _header_size           = header_size;

   _relocation_size       = locs_size;

   _content_offset        = align_code_offset(header_size + _relocation_size);

   _code_offset           = _content_offset;

   _data_offset           = size;

   _frame_size            =  0;

   set_oop_maps(NULL);

 }

 // Creates a CodeBlob from a CodeBuffer. Sets up the size of the different regions,

 // and copy code and relocation info.

 CodeBlob::CodeBlob(

   const char* name,

   CodeBuffer* cb,

   int         header_size,

   int         size,

   int         frame_complete,

   int         frame_size,

   OopMapSet*  oop_maps

 ) {

   assert(size        == round_to(size,        oopSize), "unaligned size");

   assert(header_size == round_to(header_size, oopSize), "unaligned size");

   _name                  = name;

   _size                  = size;

   _frame_complete_offset = frame_complete;

   _header_size           = header_size;

   _relocation_size       = round_to(cb->total_relocation_size(), oopSize);

   _content_offset        = align_code_offset(header_size + _relocation_size);

   _code_offset           = _content_offset + cb->total_offset_of(cb->insts());

   _data_offset           = _content_offset + round_to(cb->total_content_size(), oopSize);

   assert(_data_offset <= size, "codeBlob is too small");

   cb->copy_code_and_locs_to(this);

   set_oop_maps(oop_maps);

   _frame_size = frame_size;

 #ifdef COMPILER1

   // probably wrong for tiered

   assert(_frame_size >= -1, "must use frame size or -1 for runtime stubs");

 #endif // COMPILER1

 }

 void CodeBlob::set_oop_maps(OopMapSet* p) {

   // Danger Will Robinson! This method allocates a big

   // chunk of memory, its your job to free it.

   if (p != NULL) {

     // We need to allocate a chunk big enough to hold the OopMapSet and all of its OopMaps

     _oop_maps = (OopMapSet* )NEW_C_HEAP_ARRAY(unsigned char, p->heap_size(), mtCode);

     p->copy_to((address)_oop_maps);

   } else {

     _oop_maps = NULL;

   }

 }

 void CodeBlob::trace_new_stub(CodeBlob* stub, const char* name1, const char* name2) {

   // Do not hold the CodeCache lock during name formatting.

   assert(!CodeCache_lock->owned_by_self(), "release CodeCache before registering the stub");

   if (stub != NULL) {

     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("Decoding %s " INTPTR_FORMAT, stub_id, (intptr_t) stub);

       Disassembler::decode(stub->code_begin(), stub->code_end());

       tty->cr();

     }

     Forte::register_stub(stub_id, stub->code_begin(), stub->code_end());

     if (JvmtiExport::should_post_dynamic_code_generated()) {

       const char* 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();

 }

 void CodeBlob::flush() {

   if (_oop_maps) {

     FREE_C_HEAP_ARRAY(unsigned char, _oop_maps, mtCode);

     _oop_maps = NULL;

   }

   _strings.free();

 }

 OopMap* CodeBlob::oop_map_for_return_address(address return_address) {

   assert(oop_maps() != NULL, "nope");

   return oop_maps()->find_map_at_offset((intptr_t) return_address - (intptr_t) code_begin());

 }

 //----------------------------------------------------------------------------------------------------

 // Implementation of BufferBlob

 BufferBlob::BufferBlob(const char* name, int size)

 : CodeBlob(name, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, /*locs_size:*/ 0)

 {}

 BufferBlob* BufferBlob::create(const char* name, int buffer_size) {

   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

   BufferBlob* blob = NULL;

   unsigned int size = sizeof(BufferBlob);

   // align the size to CodeEntryAlignment

   size = align_code_offset(size);

   size += round_to(buffer_size, oopSize);

   assert(name != NULL, "must provide a name");

   {

     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

     blob = new (size) BufferBlob(name, size);

   }

   // Track memory usage statistic after releasing CodeCache_lock

   MemoryService::track_code_cache_memory_usage();

   return blob;

 }

 BufferBlob::BufferBlob(const char* name, int size, CodeBuffer* cb)

   : CodeBlob(name, cb, sizeof(BufferBlob), size, CodeOffsets::frame_never_safe, 0, NULL)

 {}

 BufferBlob* BufferBlob::create(const char* name, CodeBuffer* cb) {

   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

   BufferBlob* blob = NULL;

   unsigned int size = allocation_size(cb, sizeof(BufferBlob));

   assert(name != NULL, "must provide a name");

   {

     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

     blob = new (size) BufferBlob(name, size, cb);

   }

   // Track memory usage statistic after releasing CodeCache_lock

   MemoryService::track_code_cache_memory_usage();

   return blob;

 }

 void* BufferBlob::operator new(size_t s, unsigned size, bool is_critical) throw() {

   void* p = CodeCache::allocate(size, is_critical);

   return p;

 }

 void BufferBlob::free( BufferBlob *blob ) {

   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

   blob->flush();

   {

     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

     CodeCache::free((CodeBlob*)blob);

   }

   // Track memory usage statistic after releasing CodeCache_lock

   MemoryService::track_code_cache_memory_usage();

 }

 //----------------------------------------------------------------------------------------------------

 // Implementation of AdapterBlob

 AdapterBlob::AdapterBlob(int size, CodeBuffer* cb) :

   BufferBlob("I2C/C2I adapters", size, cb) {

   CodeCache::commit(this);

 }

 AdapterBlob* AdapterBlob::create(CodeBuffer* cb) {

   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

   AdapterBlob* blob = NULL;

   unsigned int size = allocation_size(cb, sizeof(AdapterBlob));

   {

     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

     // The parameter 'true' indicates a critical memory allocation.

     // This means that CodeCacheMinimumFreeSpace is used, if necessary

     const bool is_critical = true;

     blob = new (size, is_critical) AdapterBlob(size, cb);

   }

   // Track memory usage statistic after releasing CodeCache_lock

   MemoryService::track_code_cache_memory_usage();

   return blob;

 }

 VtableBlob::VtableBlob(const char* name, int size) :

   BufferBlob(name, size) {

 }

 VtableBlob* VtableBlob::create(const char* name, int buffer_size) {

   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

   VtableBlob* blob = NULL;

   unsigned int size = sizeof(VtableBlob);

   // align the size to CodeEntryAlignment

   size = align_code_offset(size);

   size += round_to(buffer_size, oopSize);

   assert(name != NULL, "must provide a name");

   {

     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

     blob = new (size) VtableBlob(name, size);

   }

   // 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 = NULL;

   unsigned int size = sizeof(MethodHandlesAdapterBlob);

   // align the size to CodeEntryAlignment

   size = align_code_offset(size);

   size += round_to(buffer_size, oopSize);

   {

     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

     // The parameter 'true' indicates a critical memory allocation.

     // This means that CodeCacheMinimumFreeSpace is used, if necessary

     const bool is_critical = true;

     blob = new (size, is_critical) MethodHandlesAdapterBlob(size);

   }

   // Track memory usage statistic after releasing CodeCache_lock

   MemoryService::track_code_cache_memory_usage();

   return blob;

 }

 //----------------------------------------------------------------------------------------------------

 // Implementation of RuntimeStub

 RuntimeStub::RuntimeStub(

   const char* name,

   CodeBuffer* cb,

   int         size,

   int         frame_complete,

   int         frame_size,

   OopMapSet*  oop_maps,

   bool        caller_must_gc_arguments

 )

 : CodeBlob(name, cb, sizeof(RuntimeStub), size, frame_complete, frame_size, oop_maps)

 {

   _caller_must_gc_arguments = caller_must_gc_arguments;

 }

 RuntimeStub* RuntimeStub::new_runtime_stub(const char* stub_name,

                                            CodeBuffer* cb,

                                            int frame_complete,

                                            int frame_size,

                                            OopMapSet* oop_maps,

                                            bool caller_must_gc_arguments)

 {

   RuntimeStub* stub = NULL;

   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

   {

     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

     unsigned int size = allocation_size(cb, sizeof(RuntimeStub));

     stub = new (size) RuntimeStub(stub_name, cb, size, frame_complete, frame_size, oop_maps, caller_must_gc_arguments);

   }

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

   return stub;

 }

 void* RuntimeStub::operator new(size_t s, unsigned size) throw() {

   void* p = CodeCache::allocate(size, true);

   if (!p) fatal("Initial size of CodeCache is too small");

   return p;

 }

 // operator new shared by all singletons:

 void* SingletonBlob::operator new(size_t s, unsigned size) throw() {

   void* p = CodeCache::allocate(size, true);

   if (!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", cb, sizeof(DeoptimizationBlob), size, 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 = NULL;

   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

   {

     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

     unsigned int size = allocation_size(cb, sizeof(DeoptimizationBlob));

     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;

 }

 //----------------------------------------------------------------------------------------------------

 // Implementation of UncommonTrapBlob

 #ifdef COMPILER2

 UncommonTrapBlob::UncommonTrapBlob(

   CodeBuffer* cb,

   int         size,

   OopMapSet*  oop_maps,

   int         frame_size

 )

 : SingletonBlob("UncommonTrapBlob", cb, sizeof(UncommonTrapBlob), size, frame_size, oop_maps)

 {}

 UncommonTrapBlob* UncommonTrapBlob::create(

   CodeBuffer* cb,

   OopMapSet*  oop_maps,

   int        frame_size)

 {

   UncommonTrapBlob* blob = NULL;

   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

   {

     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

     unsigned int size = allocation_size(cb, sizeof(UncommonTrapBlob));

     blob = new (size) UncommonTrapBlob(cb, size, oop_maps, frame_size);

   }

   trace_new_stub(blob, "UncommonTrapBlob");

   return blob;

 }

 #endif // COMPILER2

 //----------------------------------------------------------------------------------------------------

 // Implementation of ExceptionBlob

 #ifdef COMPILER2

 ExceptionBlob::ExceptionBlob(

   CodeBuffer* cb,

   int         size,

   OopMapSet*  oop_maps,

   int         frame_size

 )

 : SingletonBlob("ExceptionBlob", cb, sizeof(ExceptionBlob), size, frame_size, oop_maps)

 {}

 ExceptionBlob* ExceptionBlob::create(

   CodeBuffer* cb,

   OopMapSet*  oop_maps,

   int         frame_size)

 {

   ExceptionBlob* blob = NULL;

   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

   {

     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

     unsigned int size = allocation_size(cb, sizeof(ExceptionBlob));

     blob = new (size) 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", cb, sizeof(SafepointBlob), size, frame_size, oop_maps)

 {}

 SafepointBlob* SafepointBlob::create(

   CodeBuffer* cb,

   OopMapSet*  oop_maps,

   int         frame_size)

 {

   SafepointBlob* blob = NULL;

   ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock

   {

     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);

     unsigned int size = allocation_size(cb, sizeof(SafepointBlob));

     blob = new (size) SafepointBlob(cb, size, oop_maps, frame_size);

   }

   trace_new_stub(blob, "SafepointBlob");

   return blob;

 }

 //----------------------------------------------------------------------------------------------------

 // Verification and printing

 void CodeBlob::verify() {

   ShouldNotReachHere();

 }

 void CodeBlob::print_on(outputStream* st) const {

   st->print_cr("[CodeBlob (" INTPTR_FORMAT ")]", p2i(this));

   st->print_cr("Framesize: %d", _frame_size);

 }

 void CodeBlob::print_value_on(outputStream* st) const {

   st->print_cr("[CodeBlob]");

 }

 void BufferBlob::verify() {

   // unimplemented

 }

 void BufferBlob::print_on(outputStream* st) const {

   CodeBlob::print_on(st);

   print_value_on(st);

 }

 void BufferBlob::print_value_on(outputStream* st) const {

   st->print_cr("BufferBlob (" INTPTR_FORMAT  ") used for %s", p2i(this), name());

 }

 void RuntimeStub::verify() {

   // unimplemented

 }

 void RuntimeStub::print_on(outputStream* st) const {

   ttyLocker ttyl;

   CodeBlob::print_on(st);

   st->print("Runtime Stub (" INTPTR_FORMAT "): ", p2i(this));

   st->print_cr("%s", name());

   Disassembler::decode((CodeBlob*)this, st);

 }

 void RuntimeStub::print_value_on(outputStream* st) const {

   st->print("RuntimeStub (" INTPTR_FORMAT "): ", p2i(this)); st->print("%s", name());

 }

 void SingletonBlob::verify() {

   // unimplemented

 }

 void SingletonBlob::print_on(outputStream* st) const {

   ttyLocker ttyl;

   CodeBlob::print_on(st);

   st->print_cr("%s", name());

   Disassembler::decode((CodeBlob*)this, st);

 }

 void SingletonBlob::print_value_on(outputStream* st) const {

   st->print_cr("%s", name());

 }

 void DeoptimizationBlob::print_value_on(outputStream* st) const {

   st->print_cr("Deoptimization (frame not available)");

 }