From a7acbdd7c7885a92e3e62d485c0ceaa95923806f Mon Sep 17 00:00:00 2001
Date: Mon, 27 May 2024 16:14:55 +0800
Subject: [PATCH] [Huawei]Add Aggressive CDS
---
 hotspot/make/bsd/makefiles/mapfile-vers-debug |   1 +
 .../make/bsd/makefiles/mapfile-vers-product   |   1 +
 .../make/linux/makefiles/mapfile-vers-debug   |   1 +
 .../make/linux/makefiles/mapfile-vers-product |   1 +
 hotspot/src/share/vm/cds/archiveBuilder.cpp   |   5 +
 hotspot/src/share/vm/cds/dynamicArchive.cpp   |  20 +
 .../share/vm/classfile/classFileParser.cpp    |  32 ++
 .../vm/classfile/systemDictionaryShared.cpp   | 375 ++++++++++++++++++
 .../vm/classfile/systemDictionaryShared.hpp   |  13 +
 hotspot/src/share/vm/classfile/vmSymbols.hpp  |   2 +
 hotspot/src/share/vm/memory/filemap.cpp       |  53 ++-
 hotspot/src/share/vm/memory/filemap.hpp       |  11 +
 hotspot/src/share/vm/prims/jvm.cpp            |  30 ++
 hotspot/src/share/vm/prims/jvm.h              |   6 +
 hotspot/src/share/vm/runtime/arguments.cpp    |  16 +
 hotspot/src/share/vm/runtime/arguments.hpp    |   4 +
 hotspot/src/share/vm/runtime/globals.hpp      |   8 +
 hotspot/src/share/vm/utilities/macros.hpp     |   9 +
 jdk/make/mapfiles/libjava/mapfile-linux       |   1 +
 jdk/make/mapfiles/libjava/mapfile-vers        |   1 +
 .../share/classes/java/lang/ClassLoader.java  |  35 ++
 .../classes/java/net/AggressiveCDSPlugin.java |  45 +++
 .../classes/java/net/URLClassLoader.java      |  27 ++
 .../java/security/ProtectionDomain.java       |  16 +
 .../java/security/SecureClassLoader.java      |  12 +
 .../share/classes/sun/misc/URLClassPath.java  |  18 +
 jdk/src/share/javavm/export/jvm.h             |   5 +
 jdk/src/share/native/java/lang/ClassLoader.c  |  25 ++
 28 files changed, 772 insertions(+), 1 deletion(-)
 create mode 100644 jdk/src/share/classes/java/net/AggressiveCDSPlugin.java

diff --git a/hotspot/make/bsd/makefiles/mapfile-vers-debug b/hotspot/make/bsd/makefiles/mapfile-vers-debug
index c60ad3e00..86af8a1be 100644
--- a/hotspot/make/bsd/makefiles/mapfile-vers-debug
+++ b/hotspot/make/bsd/makefiles/mapfile-vers-debug
@@ -233,6 +233,7 @@
                 _JVM_AdaptiveHeapGetG1PeriodicGCInterval
                 _JVM_AdaptiveHeapSetG1PeriodicGCLoadThreshold
                 _JVM_AdaptiveHeapGetG1PeriodicGCLoadThreshold
+                _JVM_DefineTrustedSharedClass
                 _JVM_Sleep
                 _JVM_Socket
                 _JVM_SocketAvailable
diff --git a/hotspot/make/bsd/makefiles/mapfile-vers-product b/hotspot/make/bsd/makefiles/mapfile-vers-product
index 94d123c9f..69cd3f962 100644
--- a/hotspot/make/bsd/makefiles/mapfile-vers-product
+++ b/hotspot/make/bsd/makefiles/mapfile-vers-product
@@ -233,6 +233,7 @@
                 _JVM_AdaptiveHeapGetG1PeriodicGCLoadThreshold
                 _JVM_AdaptiveHeapSetG1PeriodicGCInterval
                 _JVM_AdaptiveHeapSetG1PeriodicGCLoadThreshold
+                _JVM_DefineTrustedSharedClass
                 _JVM_Sleep
                 _JVM_Socket
                 _JVM_SocketAvailable
diff --git a/hotspot/make/linux/makefiles/mapfile-vers-debug b/hotspot/make/linux/makefiles/mapfile-vers-debug
index 1ebe436cb..b006a84c2 100644
--- a/hotspot/make/linux/makefiles/mapfile-vers-debug
+++ b/hotspot/make/linux/makefiles/mapfile-vers-debug
@@ -237,6 +237,7 @@ SUNWprivate_1.1 {
                 JVM_AdaptiveHeapGetG1PeriodicGCInterval;
                 JVM_AdaptiveHeapSetG1PeriodicGCLoadThreshold;
                 JVM_AdaptiveHeapGetG1PeriodicGCLoadThreshold;
+                JVM_DefineTrustedSharedClass;
                 JVM_Sleep;
                 JVM_Socket;
                 JVM_SocketAvailable;
diff --git a/hotspot/make/linux/makefiles/mapfile-vers-product b/hotspot/make/linux/makefiles/mapfile-vers-product
index 75e527894..64ccc47fb 100644
--- a/hotspot/make/linux/makefiles/mapfile-vers-product
+++ b/hotspot/make/linux/makefiles/mapfile-vers-product
@@ -237,6 +237,7 @@ SUNWprivate_1.1 {
                 JVM_AdaptiveHeapGetG1PeriodicGCInterval;
                 JVM_AdaptiveHeapSetG1PeriodicGCLoadThreshold;
                 JVM_AdaptiveHeapGetG1PeriodicGCLoadThreshold;
+                JVM_DefineTrustedSharedClass;
                 JVM_Sleep;
                 JVM_Socket;
                 JVM_SocketAvailable;
diff --git a/hotspot/src/share/vm/cds/archiveBuilder.cpp b/hotspot/src/share/vm/cds/archiveBuilder.cpp
index 13a620028..decd638e0 100644
--- a/hotspot/src/share/vm/cds/archiveBuilder.cpp
+++ b/hotspot/src/share/vm/cds/archiveBuilder.cpp
@@ -772,7 +772,12 @@ void ArchiveBuilder::clean_up_src_obj_table() {
 }
 
 void ArchiveBuilder::write_archive(FileMapInfo* mapinfo) {
+#if INCLUDE_AGGRESSIVE_CDS
+  assert(mapinfo->header()->magic() == (UseAggressiveCDS ?
+         CDS_AGGRESSIVE_ARCHIVE_MAGIC : CDS_DYNAMIC_ARCHIVE_MAGIC), "Dynamic CDS or Aggressive CDS calls only");
+#else
   assert(mapinfo->header()->magic() == CDS_DYNAMIC_ARCHIVE_MAGIC, "Dynamic CDS calls only");
+#endif // INCLUDE_AGGRESSIVE_CDS
 
   mapinfo->write_dynamic_header();
 
diff --git a/hotspot/src/share/vm/cds/dynamicArchive.cpp b/hotspot/src/share/vm/cds/dynamicArchive.cpp
index a623c5b00..2e5ab9385 100644
--- a/hotspot/src/share/vm/cds/dynamicArchive.cpp
+++ b/hotspot/src/share/vm/cds/dynamicArchive.cpp
@@ -165,6 +165,16 @@ void DynamicArchiveBuilder::init_header() {
 
   FileMapInfo* base_info = FileMapInfo::current_info();
   _header->set_base_header_crc(base_info->header()->crc());
+
+#if INCLUDE_AGGRESSIVE_CDS
+  if (UseAggressiveCDS) {
+    int crc = FileMapInfo::DynamicArchiveHeader::get_current_program_crc();
+    _header->set_program_crc(crc);
+  } else {
+    _header->set_program_crc(0);
+  }
+#endif // INCLUDE_AGGRESSIVE_CDS
+
   for (int i = 0; i < MetaspaceShared::n_regions; i++) {
     _header->set_base_region_crc(i, base_info->header()->space_crc(i));
   }
@@ -401,6 +411,16 @@ bool DynamicArchive::validate(FileMapInfo* dynamic_info) {
     return false;
   }
 
+#if INCLUDE_AGGRESSIVE_CDS
+  // Check the program crc
+  if (UseAggressiveCDS) {
+    if (dynamic_header->program_crc() != FileMapInfo::DynamicArchiveHeader::get_current_program_crc()) {
+      FileMapInfo::fail_continue("Aggressive Dynamic archive cannot be used: program crc verification failed.");
+      return false;
+    }
+  }
+#endif // INCLUDE_AGGRESSIVE_CDS
+
   // Check each space's crc
   for (int i = 0; i < MetaspaceShared::n_regions; i++) {
     if (dynamic_header->base_region_crc(i) != base_info->space_crc(i)) {
diff --git a/hotspot/src/share/vm/classfile/classFileParser.cpp b/hotspot/src/share/vm/classfile/classFileParser.cpp
index b9fde38dc..8f1b2d47a 100644
--- a/hotspot/src/share/vm/classfile/classFileParser.cpp
+++ b/hotspot/src/share/vm/classfile/classFileParser.cpp
@@ -4416,6 +4416,38 @@ instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
   if (DynamicDumpSharedSpaces && !SystemDictionary::is_builtin_loader(class_loader)) {
     this_klass->set_shared_classpath_index(UNREGISTERED_INDEX);
     SystemDictionaryShared::set_shared_class_misc_info(this_klass(), cfs);
+#if INCLUDE_AGGRESSIVE_CDS
+    if (UseAggressiveCDS && protection_domain() != NULL) {
+      ResourceMark rm(THREAD);
+      KlassHandle protectionDomain_klass(THREAD, SystemDictionary::ProtectionDomain_klass());
+      JavaValue result(T_OBJECT);
+      JavaCalls::call_virtual(&result,
+                              protection_domain,
+                              protectionDomain_klass,
+                              vmSymbols::getLocationNoFragString_name(),
+                              vmSymbols::void_string_signature(),
+                              THREAD);
+      if (!HAS_PENDING_EXCEPTION) {
+        oop res_oop = (oop) result.get_jobject();
+        if (res_oop != NULL) {
+          char* string_value = java_lang_String::as_utf8_string(res_oop);
+          if (strlen(string_value) != 0) {
+            SystemDictionaryShared::set_url_string(this_klass(), string_value);
+            SystemDictionaryShared::save_timestamp(this_klass(), string_value);
+          }
+        }
+      } else {
+        char* ex_msg = const_cast<char*>("");
+        oop message = java_lang_Throwable::message(PENDING_EXCEPTION);
+        if (message != NULL) {
+          ex_msg = java_lang_String::as_utf8_string(message);
+        }
+        dynamic_cds_log->print_cr("get LocationNoFragString from protection_domain has encountered exception: %s %s",
+                                   PENDING_EXCEPTION->klass()->external_name(), ex_msg);
+        CLEAR_PENDING_EXCEPTION;
+      }
+    }
+#endif // INCLUDE_AGGRESSIVE_CDS
   }
 #endif // INCLUDE_CDS
 
diff --git a/hotspot/src/share/vm/classfile/systemDictionaryShared.cpp b/hotspot/src/share/vm/classfile/systemDictionaryShared.cpp
index 3a601ee37..7707d6ac6 100644
--- a/hotspot/src/share/vm/classfile/systemDictionaryShared.cpp
+++ b/hotspot/src/share/vm/classfile/systemDictionaryShared.cpp
@@ -35,6 +35,10 @@
 #include "utilities/resourceHash.hpp"
 #include "runtime/mutexLocker.hpp"
 #include "utilities/ostream.hpp"
+#if INCLUDE_AGGRESSIVE_CDS
+#include "memory/oopFactory.hpp"
+#include "runtime/javaCalls.hpp"
+#endif // INCLUDE_AGGRESSIVE_CDS
 
 DEBUG_ONLY(bool SystemDictionaryShared::_no_class_loading_should_happen = false;)
 bool SystemDictionaryShared::_dump_in_progress = false;
@@ -68,6 +72,14 @@ public:
     }
   };
 
+#if INCLUDE_AGGRESSIVE_CDS
+  struct DTSharedClassFile {
+    int length;
+    u1 data[1];
+    int obj_size() { return ((int)sizeof(length)) + length; }
+  };
+#endif // INCLUDE_AGGRESSIVE_CDS
+
   InstanceKlass*               _klass;
   InstanceKlass*               _nest_host;
   bool                         _failed_verification;
@@ -78,6 +90,10 @@ public:
   GrowableArray<DTVerifierConstraint>* _verifier_constraints;
   GrowableArray<char>*                 _verifier_constraint_flags;
   GrowableArray<DTLoaderConstraint>* _loader_constraints;
+#if INCLUDE_AGGRESSIVE_CDS
+  DTSharedClassFile*           _url_string;
+  int64_t                     _classfile_timestamp;
+#endif // INCLUDE_AGGRESSIVE_CDS
 
   DumpTimeSharedClassInfo() {
     _klass = NULL;
@@ -92,6 +108,10 @@ public:
     _verifier_constraints = NULL;
     _verifier_constraint_flags = NULL;
     _loader_constraints = NULL;
+#if INCLUDE_AGGRESSIVE_CDS
+    _url_string = NULL;
+    _classfile_timestamp = 0;
+#endif // INCLUDE_AGGRESSIVE_CDS
   }
 
   void add_verification_constraint(InstanceKlass* k, Symbol* name,
@@ -149,6 +169,44 @@ public:
   void set_failed_verification()                    { _failed_verification = true; }
   InstanceKlass* nest_host() const                  { return _nest_host; }
   void set_nest_host(InstanceKlass* nest_host)      { _nest_host = nest_host; }
+
+#if INCLUDE_AGGRESSIVE_CDS
+  DTSharedClassFile* url_string() {
+    return _url_string;
+  }
+
+  size_t url_string_size() {
+    if (_url_string != NULL) {
+      return (size_t)(_url_string->obj_size());
+    }
+    return (size_t)0;
+  }
+
+  void copy_url_string(char* string_value) {
+    assert(strlen(string_value) != 0, "sanity");
+    size_t string_len = strlen(string_value) + (size_t)1;
+    size_t size = offset_of(DTSharedClassFile, data) + string_len;
+    _url_string = (DTSharedClassFile*) NEW_C_HEAP_ARRAY(u1, size, mtInternal);
+    _url_string->length = (int)string_len;
+    memcpy(_url_string->data, string_value, string_len);
+    assert((int)size == _url_string->obj_size(), "sanity");
+  }
+
+  void free_url_string() {
+    if (_url_string != NULL) {
+      FREE_C_HEAP_ARRAY(u1, _url_string, mtInternal);
+      _url_string = NULL;
+    }
+  }
+
+  int64_t classfile_timestamp() {
+    return _classfile_timestamp;
+  }
+
+  void set_classfile_timestamp(int64_t classfile_timestamp) {
+    _classfile_timestamp = classfile_timestamp;
+  }
+#endif // INCLUDE_AGGRESSIVE_CDS
 };
 
 inline unsigned DumpTimeSharedClassTable_hash(InstanceKlass* const& k) {
@@ -245,7 +303,18 @@ public:
     }
   };
 
+#if INCLUDE_AGGRESSIVE_CDS
+  struct RTSharedClassFile {
+    int length;
+    u1 data[1];
+  };
+#endif // INCLUDE_AGGRESSIVE_CDS
+
   InstanceKlass* _klass;
+#if INCLUDE_AGGRESSIVE_CDS
+  RTSharedClassFile* _url_string;
+  int64_t _classfile_timestamp;
+#endif // INCLUDE_AGGRESSIVE_CDS
   int _num_verifier_constraints;
   int _num_loader_constraints;
 
@@ -294,6 +363,17 @@ public:
            verifier_constraint_flags_size(num_verifier_constraints);
   }
 
+#if INCLUDE_AGGRESSIVE_CDS
+  static size_t byte_size(DumpTimeSharedClassInfo& info) {
+    size_t previous_size = byte_size(info._klass, info.num_verifier_constraints(), info.num_loader_constraints());
+    if (UseAggressiveCDS) {
+      size_t cf_size = info.url_string_size();
+      if (cf_size != 0) return align_up(previous_size, sizeof(int)) + cf_size;
+    }
+    return previous_size;
+  }
+#endif // INCLUDE_AGGRESSIVE_CDS
+
 private:
   size_t crc_offset() const {
     return header_size_size();
@@ -321,6 +401,13 @@ private:
     assert(0 <= i && i < _num_loader_constraints, "sanity");
   }
 
+#if INCLUDE_AGGRESSIVE_CDS
+  size_t url_string_offset() const {
+    return align_up(verifier_constraint_flags_offset() + verifier_constraint_flags_size(_num_verifier_constraints),
+                    sizeof(int));
+  }
+#endif // INCLUDE_AGGRESSIVE_CDS
+
 public:
   CrcInfo* crc() const {
     assert(crc_size(_klass) > 0, "must be");
@@ -350,6 +437,20 @@ public:
     return loader_constraints() + i;
   }
 
+#if INCLUDE_AGGRESSIVE_CDS
+  RTSharedClassFile* url_string() {
+    return (RTSharedClassFile*)(address(this) + url_string_offset());
+  }
+
+  int64_t classfile_timestamp() {
+    return _classfile_timestamp;
+  }
+
+  void set_classfile_timestamp(int64_t classfile_timestamp) {
+    _classfile_timestamp = classfile_timestamp;
+  }
+#endif // INCLUDE_AGGRESSIVE_CDS
+
   void init(DumpTimeSharedClassInfo& info) {
     ArchiveBuilder* builder = ArchiveBuilder::current();
     assert(builder->is_in_buffer_space(info._klass), "must be");
@@ -383,6 +484,18 @@ public:
       }
     }
 
+#if INCLUDE_AGGRESSIVE_CDS
+    if (info.url_string_size() != 0) {
+      _url_string = url_string();
+      memcpy(_url_string, info.url_string(), info.url_string_size());
+      ArchivePtrMarker::mark_pointer(&_url_string);
+      info.free_url_string();
+    } else {
+      _url_string = NULL;
+    }
+    set_classfile_timestamp(info.classfile_timestamp());
+#endif // INCLUDE_AGGRESSIVE_CDS
+
     ArchivePtrMarker::mark_pointer(&_klass);
   }
 
@@ -426,6 +539,69 @@ public:
        const RunTimeSharedClassInfo* value, Symbol* key, int len_unused) {
     return (value->_klass->name() == key);
   }
+
+#if INCLUDE_AGGRESSIVE_CDS
+  // check timestamp in the load time when UseAggressiveCDS.
+  //   regular_file(*.class): need to check timestamp.
+  //   jar_file(*.jar): no need to check timestamp here,already check programe_crc
+  //                    somewhere else, see DynamicArchive::validate.
+  //   other_file: not supported when UseAggressiveCDS.
+  bool check_classfile_timestamp(char* url_string, TRAPS) {
+    if (SystemDictionaryShared::is_regular_file(url_string)) {
+      ResourceMark rm(THREAD);
+      char* dir = SystemDictionaryShared::get_filedir(url_string);
+      if (dir == NULL) {
+        return false;
+      }
+      int64_t timestamp = SystemDictionaryShared::get_timestamp(dir, _klass->name());
+      if (timestamp != _classfile_timestamp) {
+        dynamic_cds_log->print_cr("%s, timestamp mismatch: " INT64_FORMAT " -> " INT64_FORMAT, _klass->name()->as_C_string(), _classfile_timestamp, timestamp);
+        return false;
+      }
+    } else if (!SystemDictionaryShared::is_jar_file(url_string)) {
+      dynamic_cds_log->print_cr("Unsupported URL:%s", url_string);
+      return false;
+    }
+    return true;
+  }
+
+  Handle get_protection_domain(Handle class_loader, TRAPS) {
+    if (_url_string == NULL) {
+      return Handle();
+    }
+    char* data_ptr = (char*)(_url_string->data);
+
+    if (CheckClassFileTimeStamp) {
+      if (!check_classfile_timestamp(data_ptr, THREAD)) {
+        return Handle();
+      }
+    }
+
+    Handle url_string = java_lang_String::create_from_str(data_ptr, THREAD);
+    JavaValue result(T_OBJECT);
+    JavaCalls::call_virtual(&result,
+                            class_loader,
+                            class_loader->klass(),
+                            vmSymbols::getProtectionDomainByURLString_name(),
+                            vmSymbols::getProtectionDomainInternal_signature(),
+                            url_string, THREAD);
+    if (!HAS_PENDING_EXCEPTION) {
+      oop pd = (oop) result.get_jobject();
+      return Handle(THREAD, pd);
+    } else {
+      ResourceMark rm(THREAD);
+      char* ex_msg = const_cast<char*>("");
+      oop message = java_lang_Throwable::message(PENDING_EXCEPTION);
+      if (message != NULL) {
+        ex_msg = java_lang_String::as_utf8_string(message);
+      }
+      dynamic_cds_log->print_cr("get protection_domain has encountered exception: %s %s",
+                                 PENDING_EXCEPTION->klass()->external_name(), ex_msg);
+      CLEAR_PENDING_EXCEPTION;
+    }
+    return Handle();
+  }
+#endif // INCLUDE_AGGRESSIVE_CDS
 };
 
 class RunTimeSharedDictionary : public OffsetCompactHashtable<
@@ -710,7 +886,11 @@ public:
 
   bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
     if (!info.is_excluded()) {
+#if INCLUDE_AGGRESSIVE_CDS
+      size_t byte_size = RunTimeSharedClassInfo::byte_size(info);
+#else
       size_t byte_size = RunTimeSharedClassInfo::byte_size(info._klass, info.num_verifier_constraints(), info.num_loader_constraints());
+#endif // INCLUDE_AGGRESSIVE_CDS
       _shared_class_info_size += align_up(byte_size, KlassAlignmentInBytes);
     }
     return true; // keep on iterating
@@ -746,6 +926,38 @@ unsigned int SystemDictionaryShared::hash_for_shared_dictionary(address ptr) {
   }
 }
 
+#if INCLUDE_AGGRESSIVE_CDS
+class ExcludeDuplicateKlass : StackObj {
+public:
+  static const int INITIAL_TABLE_SIZE = 15889;
+
+  ExcludeDuplicateKlass(int size) : _has_been_visited(size) {}
+
+  bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
+    if (!info.is_excluded()) {
+      bool created;
+      Symbol* name = info._klass->name();
+      address* info_ptr = _has_been_visited.add_if_absent((address)name, (address)&info, &created);
+      if (!created) {
+        info.set_excluded();
+        DumpTimeSharedClassInfo* first_info = (DumpTimeSharedClassInfo*)(*info_ptr);
+        if (!first_info->is_excluded()) {
+          first_info->set_excluded();
+        }
+        if (TraceDynamicCDS) {
+          ResourceMark rm;
+          dynamic_cds_log->print_cr("[AggressiveCDS] Skipping duplicate class (excluded): %s", name->as_C_string());
+        }
+      }
+    }
+    return true;
+  }
+
+private:
+  KVHashtable<address, address, mtClassShared> _has_been_visited;
+};
+#endif // INCLUDE_AGGRESSIVE_CDS
+
 class CopySharedClassInfoToArchive : StackObj {
   CompactHashtableWriter* _writer;
   bool _is_builtin;
@@ -757,7 +969,11 @@ public:
 
   bool do_entry(InstanceKlass* k, DumpTimeSharedClassInfo& info) {
     if (!info.is_excluded() && info.is_builtin() == _is_builtin) {
+#if INCLUDE_AGGRESSIVE_CDS
+      size_t byte_size = RunTimeSharedClassInfo::byte_size(info);
+#else
       size_t byte_size = RunTimeSharedClassInfo::byte_size(info._klass, info.num_verifier_constraints(), info.num_loader_constraints());
+#endif // INCLUDE_AGGRESSIVE_CDS
       RunTimeSharedClassInfo* record;
       record = (RunTimeSharedClassInfo*)ArchiveBuilder::ro_region_alloc(byte_size);
       record->init(info);
@@ -787,6 +1003,12 @@ void SystemDictionaryShared::write_dictionary(RunTimeSharedDictionary* dictionar
                                               bool is_builtin) {
   CompactHashtableStats stats;
   dictionary->reset();
+#if INCLUDE_AGGRESSIVE_CDS
+  if (UseAggressiveCDS && !is_builtin) {
+    ExcludeDuplicateKlass dup(ExcludeDuplicateKlass::INITIAL_TABLE_SIZE);
+    _dumptime_table->iterate(&dup);
+  }
+#endif // INCLUDE_AGGRESSIVE_CDS
   CompactHashtableWriter writer(_dumptime_table->count_of(is_builtin), &stats);
   CopySharedClassInfoToArchive copy(&writer, is_builtin);
   assert_lock_strong(DumpTimeTable_lock);
@@ -909,3 +1131,156 @@ InstanceKlass* SystemDictionaryShared::find_dynamic_builtin_class(Symbol* name)
     return NULL;
   }
 }
+
+#if INCLUDE_AGGRESSIVE_CDS
+static const char* JAR_FILE_PREFIX = "jar://file:";
+static const char* FILE_SEPARATOR = "file://";
+static const char* CLASSFILE_SUFFIX = ".class";
+
+static bool start_with(char* str, const char* prefix) {
+  if (str == NULL || prefix == NULL || strlen(str) < strlen(prefix)) {
+    return false;
+  }
+  if (strncmp(str, prefix, strlen(prefix)) == 0) {
+    return true;
+  }
+  return false;
+}
+
+bool SystemDictionaryShared::is_jar_file(char* url_string) {
+  if (start_with(url_string, JAR_FILE_PREFIX)) {
+    return true;
+  }
+  return false;
+}
+
+bool SystemDictionaryShared::is_regular_file(char* url_string) {
+  if (start_with(url_string, FILE_SEPARATOR)) {
+    return true;
+  }
+  return false;
+}
+
+char* SystemDictionaryShared::get_filedir(char* url_string) {
+  if (!is_regular_file(url_string)) {
+    return NULL;
+  }
+  char* dir = url_string + strlen(FILE_SEPARATOR);
+  struct stat st;
+  if (os::stat(dir, &st) == 0) {
+    if ((st.st_mode & S_IFDIR) == S_IFDIR) {
+      return dir;
+    }
+  }
+  return NULL;
+}
+
+int64_t SystemDictionaryShared::get_timestamp(char* dir, Symbol* class_name) {
+  char* name = class_name->as_C_string();
+  size_t name_len = strlen(name);
+  size_t dir_len = strlen(dir);
+  size_t classfile_suffix_len = strlen(CLASSFILE_SUFFIX);
+  char* file_path = NEW_RESOURCE_ARRAY(char, dir_len + name_len + classfile_suffix_len + 1);
+  memcpy(file_path, dir, dir_len);
+  memcpy(file_path + dir_len, name, name_len);
+  memcpy(file_path + dir_len + name_len, CLASSFILE_SUFFIX, classfile_suffix_len + 1);
+  assert(strlen(file_path) == dir_len + name_len + classfile_suffix_len, "sanity");
+  struct stat st;
+  if (os::stat(file_path, &st) == 0) {
+    return st.st_mtime;
+  }
+  dynamic_cds_log->print_cr("get timestamp failed:%s", file_path);
+  return 0;
+}
+
+Handle SystemDictionaryShared::get_protection_domain(InstanceKlass* k, Handle class_loader, TRAPS) {
+  assert(UseAggressiveCDS, "sanity");
+  RunTimeSharedClassInfo* info = RunTimeSharedClassInfo::get_for(k);
+  assert(!is_builtin_loader(class_loader), "sanity");
+  return info->get_protection_domain(class_loader, THREAD);
+}
+
+void SystemDictionaryShared::set_url_string(InstanceKlass* k, char* string_value) {
+  assert(UseAggressiveCDS, "sanity");
+  Arguments::assert_is_dumping_archive();
+  assert(!is_builtin(k), "must be unregistered class");
+  DumpTimeSharedClassInfo* info = find_or_allocate_info_for(k);
+  if (info != NULL && info->_url_string == NULL) {
+    info->copy_url_string(string_value);
+  }
+}
+
+void SystemDictionaryShared::save_timestamp(InstanceKlass* k, char* string_value) {
+  if (SystemDictionaryShared::is_regular_file(string_value)) {
+    char* dir = SystemDictionaryShared::get_filedir(string_value);
+    if (dir != NULL) {
+      int64_t timestamp = SystemDictionaryShared::get_timestamp(dir, k->name());
+      SystemDictionaryShared::set_classfile_timestamp(k, timestamp);
+    }
+  } else if (!SystemDictionaryShared::is_jar_file(string_value)) {
+    dynamic_cds_log->print_cr("Unsupported URL:%s", string_value);
+  }
+}
+
+void SystemDictionaryShared::set_classfile_timestamp(InstanceKlass* k, int64_t classfile_timestamp) {
+  assert(UseAggressiveCDS, "sanity");
+  Arguments::assert_is_dumping_archive();
+  assert(!is_builtin(k), "must be unregistered class");
+  DumpTimeSharedClassInfo* info = find_or_allocate_info_for(k);
+  if (info != NULL) {
+    info->set_classfile_timestamp(classfile_timestamp);
+  }
+}
+
+InstanceKlass* SystemDictionaryShared::lookup_trusted_share_class(Symbol* class_name,
+                                                                  Handle class_loader,
+                                                                  TRAPS) {
+  assert(UseAggressiveCDS, "sanity");
+  if (!UseSharedSpaces) {
+    return NULL;
+  }
+  if (class_name == NULL) {  // don't do this for hidden classes
+    return NULL;
+  }
+  if (SystemDictionary::is_builtin_loader(class_loader)) {
+    // Do nothing for the BUILTIN loaders.
+    return NULL;
+  }
+
+  // Classloaders that support parallelism, e.g. bootstrap classloader,
+  // or all classloaders with UnsyncloadClass do not acquire lock here
+  bool DoObjectLock = true;
+  if (is_parallelCapable(class_loader)) {
+    DoObjectLock = false;
+  }
+
+  register_loader(class_loader, CHECK_NULL);
+
+  // Make sure we are synchronized on the class loader before we proceed
+  Handle lockObject = compute_loader_lock_object(class_loader, THREAD);
+  check_loader_lock_contention(lockObject, THREAD);
+  ObjectLocker ol(lockObject, THREAD, DoObjectLock);
+
+  const RunTimeSharedClassInfo* record = find_record(&_dynamic_unregistered_dictionary, class_name);
+  if (record == NULL) {
+    return NULL;
+  }
+
+  Handle protection_domain = SystemDictionaryShared::get_protection_domain(record->_klass, class_loader, CHECK_NULL);
+
+  if (protection_domain.is_null()) {
+    // URL not matched, which means should not be loaded by this classloader
+    return NULL;
+  }
+
+  instanceKlassHandle k = acquire_class_for_current_thread(record->_klass, class_loader, protection_domain, NULL, THREAD);
+  if (!HAS_PENDING_EXCEPTION && k() != NULL) {
+    if (is_parallelCapable(class_loader)) {
+      k = find_or_define_instance_class(class_name, class_loader, k, THREAD);
+    } else {
+      define_instance_class(k, THREAD);
+    }
+  }
+  return k();
+}
+#endif // INCLUDE_AGGRESSIVE_CDS
\ No newline at end of file
diff --git a/hotspot/src/share/vm/classfile/systemDictionaryShared.hpp b/hotspot/src/share/vm/classfile/systemDictionaryShared.hpp
index fb9583d4e..3025e7350 100644
--- a/hotspot/src/share/vm/classfile/systemDictionaryShared.hpp
+++ b/hotspot/src/share/vm/classfile/systemDictionaryShared.hpp
@@ -238,6 +238,19 @@ public:
                                                   TRAPS);
 
   static InstanceKlass* find_dynamic_builtin_class(Symbol* name);
+
+#if INCLUDE_AGGRESSIVE_CDS
+  static bool is_jar_file(char* url_string);
+  static bool is_regular_file(char* url_string);
+  static char* get_filedir(char* url_string);
+  static int64_t get_timestamp(char* dir, Symbol* class_name);
+  static Handle get_protection_domain(InstanceKlass* k, Handle class_loader, TRAPS);
+  static void set_url_string(InstanceKlass* k, char* string_value);
+  static void save_timestamp(InstanceKlass* k, char* string_value);
+  static void set_classfile_timestamp(InstanceKlass* k, int64_t classfile_timestamp);
+  static int64_t get_classfile_timestamp(InstanceKlass* k);
+  static InstanceKlass* lookup_trusted_share_class(Symbol* class_name, Handle class_loader, TRAPS);
+#endif // INCLUDE_AGGRESSIVE_CDS
 };
 
 #endif // SHARE_VM_CLASSFILE_SYSTEMDICTIONARYSHARED_HPP
diff --git a/hotspot/src/share/vm/classfile/vmSymbols.hpp b/hotspot/src/share/vm/classfile/vmSymbols.hpp
index 79f15589f..2ddc6581e 100644
--- a/hotspot/src/share/vm/classfile/vmSymbols.hpp
+++ b/hotspot/src/share/vm/classfile/vmSymbols.hpp
@@ -421,6 +421,8 @@
   template(definePackageInternal_signature,           "(Ljava/lang/String;Ljava/util/jar/Manifest;Ljava/net/URL;)V") \
   template(getProtectionDomainInternal_name,          "getProtectionDomainInternal")              \
   template(getProtectionDomainInternal_signature,     "(Ljava/lang/String;)Ljava/security/ProtectionDomain;") \
+  template(getProtectionDomainByURLString_name,       "getProtectionDomainByURLString")           \
+  template(getLocationNoFragString_name,              "getLocationNoFragString")                  \
   template(url_code_signer_array_void_signature,      "(Ljava/net/URL;[Ljava/security/CodeSigner;)V") \
   template(resolved_references_name,                  "<resolved_references>")                    \
   template(referencequeue_null_name,                  "NULL")                                     \
diff --git a/hotspot/src/share/vm/memory/filemap.cpp b/hotspot/src/share/vm/memory/filemap.cpp
index 166fe2b80..b60d77be6 100644
--- a/hotspot/src/share/vm/memory/filemap.cpp
+++ b/hotspot/src/share/vm/memory/filemap.cpp
@@ -208,7 +208,11 @@ size_t FileMapInfo::DynamicArchiveHeader::data_size() {
 }
 
 bool FileMapInfo::DynamicArchiveHeader::validate() {
+#if INCLUDE_AGGRESSIVE_CDS
+  if (_magic != (UseAggressiveCDS ? CDS_AGGRESSIVE_ARCHIVE_MAGIC : CDS_DYNAMIC_ARCHIVE_MAGIC)) {
+#else
   if (_magic != CDS_DYNAMIC_ARCHIVE_MAGIC) {
+#endif // INCLUDE_AGGRESSIVE_CDS
     FileMapInfo::fail_continue("The shared archive file has a bad magic number.");
     return false;
   }
@@ -243,9 +247,48 @@ bool FileMapInfo::DynamicArchiveHeader::validate() {
   return true;
 }
 
+#if INCLUDE_AGGRESSIVE_CDS
+int FileMapInfo::DynamicArchiveHeader::get_current_program_crc() {
+  int cur_crc = 0;
+  const char* full_cmd = Arguments::java_command();
+  if (full_cmd == NULL) {
+    return 0;
+  }
+  const char* main_path = Arguments::get_appclasspath();
+  int main_path_len = strlen(main_path);
+  bool is_jar_file = strncmp(full_cmd, main_path, main_path_len) == 0;
+  if (is_jar_file) {
+    fio_fd fd = os::open(main_path, O_RDONLY | O_BINARY, 0);
+    assert(fd >= 0, "sanity");
+
+    uint32_t file_size = (uint32_t) os::lseek(fd, 0, SEEK_END);
+    os::lseek(fd, 0, SEEK_SET);
+    uint32_t max_size = 40 * 1024 * 1024; // 40M
+
+    ResourceMark rm;
+    char* buf = NEW_RESOURCE_ARRAY(char, max_size);
+
+    while(file_size) {
+      uint32_t size = MIN2(max_size, file_size);
+      size_t n = os::read(fd, buf, (unsigned int)size);
+      file_size -= n;
+      cur_crc = ClassLoader::crc32(cur_crc, buf, n);
+    }
+  }
+  return cur_crc;
+}
+#endif // INCLUDE_AGGRESSIVE_CDS
+
 void FileMapInfo::FileMapHeader::populate(FileMapInfo* mapinfo, size_t alignment) {
   if (DynamicDumpSharedSpaces) {
-    _magic = CDS_DYNAMIC_ARCHIVE_MAGIC;
+#if INCLUDE_AGGRESSIVE_CDS
+    if (UseAggressiveCDS) {
+      _magic = CDS_AGGRESSIVE_ARCHIVE_MAGIC;
+    } else
+#endif // INCLUDE_AGGRESSIVE_CDS
+    {
+      _magic = CDS_DYNAMIC_ARCHIVE_MAGIC;
+    }
   } else {
     _magic = CDS_ARCHIVE_MAGIC;
   }
@@ -434,7 +477,11 @@ bool FileMapInfo::get_base_archive_name_from_header(const char* archive_name,
     os::close(fd);
     return false;
   }
+#if INCLUDE_AGGRESSIVE_CDS
+  if (dynamic_header->magic() != (UseAggressiveCDS ? CDS_AGGRESSIVE_ARCHIVE_MAGIC : CDS_DYNAMIC_ARCHIVE_MAGIC)) {
+#else
   if (dynamic_header->magic() != CDS_DYNAMIC_ARCHIVE_MAGIC) {
+#endif // INCLUDE_AGGRESSIVE_CDS
     // Not a dynamic header, no need to proceed further.
     *size = 0;
     delete dynamic_header;
@@ -499,7 +546,11 @@ bool FileMapInfo::check_archive(const char* archive_name, bool is_static) {
     }
   } else {
     DynamicArchiveHeader* dynamic_header = (DynamicArchiveHeader*)header;
+#if INCLUDE_AGGRESSIVE_CDS
+    if (dynamic_header->magic() != (UseAggressiveCDS ? CDS_AGGRESSIVE_ARCHIVE_MAGIC : CDS_DYNAMIC_ARCHIVE_MAGIC)) {
+#else
     if (dynamic_header->magic() != CDS_DYNAMIC_ARCHIVE_MAGIC) {
+#endif // INCLUDE_AGGRESSIVE_CDS
       delete header;
       os::close(fd);
       vm_exit_during_initialization("Not a top shared archive", archive_name);
diff --git a/hotspot/src/share/vm/memory/filemap.hpp b/hotspot/src/share/vm/memory/filemap.hpp
index f6cf43a64..c246f0367 100644
--- a/hotspot/src/share/vm/memory/filemap.hpp
+++ b/hotspot/src/share/vm/memory/filemap.hpp
@@ -41,6 +41,7 @@
 
 #define CDS_ARCHIVE_MAGIC         0xf00baba2
 #define CDS_DYNAMIC_ARCHIVE_MAGIC 0xf00baba8
+#define CDS_AGGRESSIVE_ARCHIVE_MAGIC 0xf00baba4
 
 static const int JVM_IDENT_MAX = 256;
 
@@ -168,6 +169,9 @@ public:
   struct DynamicArchiveHeader : FileMapHeader {
   private:
     int    _base_header_crc;
+#if INCLUDE_AGGRESSIVE_CDS
+    int    _program_crc;
+#endif // INCLUDE_AGGRESSIVE_CDS
     int    _base_region_crc[MetaspaceShared::n_regions];
     char*  _requested_base_address;  // Archive relocation is not necessary if we map with this base address.
     size_t _ptrmap_size_in_bits;     // Size of pointer relocation bitmap
@@ -186,6 +190,11 @@ public:
       _base_region_crc[i] = c;
     }
 
+#if INCLUDE_AGGRESSIVE_CDS
+    int program_crc() const { return _program_crc; }
+    void set_program_crc(int c) { _program_crc = c; }
+#endif // INCLUDE_AGGRESSIVE_CDS
+
     void set_requested_base(char* b) {
       _requested_base_address = b;
     }
@@ -199,6 +208,8 @@ public:
     char* serialized_data()                  const { return from_mapped_offset(_serialized_data_offset); }
 
     virtual bool validate();
+
+    static int get_current_program_crc();
   };
 
   FileMapHeader * _header;
diff --git a/hotspot/src/share/vm/prims/jvm.cpp b/hotspot/src/share/vm/prims/jvm.cpp
index 55667ac32..2cc38cf66 100644
--- a/hotspot/src/share/vm/prims/jvm.cpp
+++ b/hotspot/src/share/vm/prims/jvm.cpp
@@ -3321,6 +3321,36 @@ JVM_ENTRY(jint, JVM_AdaptiveHeapGetG1PeriodicGCLoadThreshold(JNIEnv *env, jclass
 #endif
 JVM_END
 
+JVM_ENTRY(jclass, JVM_DefineTrustedSharedClass(JNIEnv *env, const char *name, jobject loader))
+#if INCLUDE_AGGRESSIVE_CDS
+  assert(UseAggressiveCDS, "sanity");
+
+  TempNewSymbol class_name = NULL;
+  if (name != NULL) {
+    const int str_len = (int)strlen(name);
+    if (str_len > Symbol::max_length()) {
+      // It's impossible to create this class;  the name cannot fit
+      // into the constant pool.
+      THROW_MSG_0(vmSymbols::java_lang_NoClassDefFoundError(), name);
+    }
+    class_name = SymbolTable::new_symbol(name, str_len, CHECK_NULL);
+  }
+
+  ResourceMark rm(THREAD);
+  Handle class_loader (THREAD, JNIHandles::resolve(loader));
+  InstanceKlass* k = SystemDictionaryShared::lookup_trusted_share_class(class_name,
+                                                                        class_loader,
+                                                                        CHECK_NULL);
+  if (k == NULL) {
+    return NULL;
+  }
+
+  return (jclass) JNIHandles::make_local(THREAD, k->java_mirror());
+#else
+  return NULL;
+#endif // INCLUDE_AGGRESSIVE_CDS
+JVM_END
+
 JVM_ENTRY(void, JVM_Yield(JNIEnv *env, jclass threadClass))
   JVMWrapper("JVM_Yield");
   if (os::dont_yield()) return;
diff --git a/hotspot/src/share/vm/prims/jvm.h b/hotspot/src/share/vm/prims/jvm.h
index 0f22f7b12..46a65604c 100644
--- a/hotspot/src/share/vm/prims/jvm.h
+++ b/hotspot/src/share/vm/prims/jvm.h
@@ -1598,6 +1598,12 @@ JNIEXPORT jint JNICALL
 JVM_AdaptiveHeapGetG1PeriodicGCLoadThreshold(JNIEnv *env, jclass clazz);
 
 
+/**
+ * Define the trusted shared class.
+ */
+JNIEXPORT jclass JNICALL
+JVM_DefineTrustedSharedClass(JNIEnv *env, const char *name, jobject loader);
+
 /* =========================================================================
  * The following defines a private JVM interface that the JDK can query
  * for the JVM version and capabilities.  sun.misc.Version defines
diff --git a/hotspot/src/share/vm/runtime/arguments.cpp b/hotspot/src/share/vm/runtime/arguments.cpp
index 45fbc1423..557695791 100644
--- a/hotspot/src/share/vm/runtime/arguments.cpp
+++ b/hotspot/src/share/vm/runtime/arguments.cpp
@@ -4356,6 +4356,11 @@ jint Arguments::apply_ergo() {
 
   ArgumentsExt::set_gc_specific_flags();
 
+#if INCLUDE_AGGRESSIVE_CDS
+  result = init_aggressive_cds_properties();
+  if (result != JNI_OK) return result;
+#endif // INCLUDE_AGGRESSIVE_CDS
+
   // Initialize Metaspace flags and alignments.
   Metaspace::ergo_initialize();
 
@@ -4640,3 +4645,14 @@ bool Arguments::copy_expand_pid(const char* src, size_t srclen,
   *b = '\0';
   return (p == src_end); // return false if not all of the source was copied
 }
+
+#if INCLUDE_AGGRESSIVE_CDS
+jint Arguments::init_aggressive_cds_properties() {
+  if (!is_dumping_archive() && SharedDynamicArchivePath != NULL && UseAggressiveCDS) {
+    bool added = false;
+    added = add_property("jdk.jbooster.aggressivecds.load=true");
+    if (!added) return JNI_ENOMEM;
+  }
+  return JNI_OK;
+}
+#endif // INCLUDE_AGGRESSIVE_CDS
\ No newline at end of file
diff --git a/hotspot/src/share/vm/runtime/arguments.hpp b/hotspot/src/share/vm/runtime/arguments.hpp
index 4f7232e48..fdd1d14b0 100644
--- a/hotspot/src/share/vm/runtime/arguments.hpp
+++ b/hotspot/src/share/vm/runtime/arguments.hpp
@@ -576,6 +576,10 @@ class Arguments : AllStatic {
     assert(Arguments::is_dumping_archive(), "dump time only");
   }
 
+#if INCLUDE_AGGRESSIVE_CDS
+  static jint init_aggressive_cds_properties();
+#endif // INCLUDE_AGGRESSIVE_CDS
+
   static bool CompileMethod(char* className, char* methodName) {
     return
       methodExists(
diff --git a/hotspot/src/share/vm/runtime/globals.hpp b/hotspot/src/share/vm/runtime/globals.hpp
index 77a4ff0b2..6aa53d2d2 100644
--- a/hotspot/src/share/vm/runtime/globals.hpp
+++ b/hotspot/src/share/vm/runtime/globals.hpp
@@ -4119,6 +4119,14 @@ class CommandLineFlags {
   product(bool, UseAppCDS, false,                                           \
           "Enable Application Class Data Sharing (AppCDS)")                 \
                                                                             \
+  experimental(bool, UseAggressiveCDS, false,                               \
+          "An aggressive stratage to improve start-up "                     \
+          "because we avoid decoding the classfile.")                       \
+                                                                            \
+  experimental(bool, CheckClassFileTimeStamp, true,                         \
+          "Check whether the modification time of the"                      \
+          "class file is changed during UseAggressiveCDS.")                 \
+                                                                            \
   product(bool, EnableSplitVerifierForAppCDS, false,                        \
           "Enable Type Check (AppCDS)")                                     \
                                                                             \
diff --git a/hotspot/src/share/vm/utilities/macros.hpp b/hotspot/src/share/vm/utilities/macros.hpp
index 599e1074d..f631c94c4 100644
--- a/hotspot/src/share/vm/utilities/macros.hpp
+++ b/hotspot/src/share/vm/utilities/macros.hpp
@@ -106,6 +106,7 @@
 
 #ifndef INCLUDE_CDS
 #define INCLUDE_CDS 1
+#define INCLUDE_AGGRESSIVE_CDS 1
 #endif
 
 #if INCLUDE_CDS
@@ -120,6 +121,14 @@
 #define NOT_CDS_RETURN_(code) { return code; }
 #endif // INCLUDE_CDS
 
+#if INCLUDE_AGGRESSIVE_CDS
+#define AGGRESSIVE_CDS_ONLY(x) x
+#define NOT_AGGRESSIVE_CDS(x)
+#else
+#define AGGRESSIVE_CDS_ONLY(x)
+#define NOT_AGGRESSIVE_CDS(x) x
+#endif // INCLUDE_AGGRESSIVE_CDS
+
 #ifndef INCLUDE_MANAGEMENT
 #define INCLUDE_MANAGEMENT 1
 #endif // INCLUDE_MANAGEMENT
diff --git a/jdk/make/mapfiles/libjava/mapfile-linux b/jdk/make/mapfiles/libjava/mapfile-linux
index ae118af70..61ec28513 100644
--- a/jdk/make/mapfiles/libjava/mapfile-linux
+++ b/jdk/make/mapfiles/libjava/mapfile-linux
@@ -129,6 +129,7 @@ SUNWprivate_1.1 {
 		Java_java_lang_ClassLoader_defineClass0;
 		Java_java_lang_ClassLoader_defineClass1;
 		Java_java_lang_ClassLoader_defineClass2;
+		Java_java_lang_ClassLoader_defineClass3;
 		Java_java_lang_ClassLoader_findBuiltinLib;
 		Java_java_lang_ClassLoader_findLoadedClass0;
 		Java_java_lang_ClassLoader_resolveClass0;
diff --git a/jdk/make/mapfiles/libjava/mapfile-vers b/jdk/make/mapfiles/libjava/mapfile-vers
index 896db04f2..abfde04a9 100644
--- a/jdk/make/mapfiles/libjava/mapfile-vers
+++ b/jdk/make/mapfiles/libjava/mapfile-vers
@@ -129,6 +129,7 @@ SUNWprivate_1.1 {
 		Java_java_lang_ClassLoader_defineClass0;
 		Java_java_lang_ClassLoader_defineClass1;
 		Java_java_lang_ClassLoader_defineClass2;
+		Java_java_lang_ClassLoader_defineClass3;
 		Java_java_lang_ClassLoader_findBuiltinLib;
 		Java_java_lang_ClassLoader_findLoadedClass0;
 		Java_java_lang_ClassLoader_resolveClass0;
diff --git a/jdk/src/share/classes/java/lang/ClassLoader.java b/jdk/src/share/classes/java/lang/ClassLoader.java
index f305c1e36..d659eff0f 100644
--- a/jdk/src/share/classes/java/lang/ClassLoader.java
+++ b/jdk/src/share/classes/java/lang/ClassLoader.java
@@ -682,6 +682,20 @@ public abstract class ClassLoader {
         }
     }
 
+    /**
+     * Determine protection domain, and check it.
+     * This method is only for AggressiveCDS.
+     *
+     * @param   name the name of the class
+     * @param   c the class
+     * @param   pd the ProtectionDomain of the class
+     */
+    private void defineClassProtectionDomain(String name, Class<?> c, ProtectionDomain pd)
+    {
+        pd = preDefineClass(name, pd);
+        postDefineClass(c, pd);
+    }
+
     /**
      * Converts an array of bytes into an instance of class <tt>Class</tt>,
      * with an optional <tt>ProtectionDomain</tt>.  If the domain is
@@ -857,6 +871,27 @@ public abstract class ClassLoader {
                                          int off, int len, ProtectionDomain pd,
                                          String source);
 
+    /**
+     * This method is only invoked when java.net.AggressiveCDSPlugin enabled.
+     */
+    private native Class<?> defineClass3(String name);
+
+    protected final Class<?> defineClass(String name) {
+        Class<?> trustedClass = defineClass3(name);
+        if (trustedClass != null) {
+            ProtectionDomain pd = AccessController.doPrivileged(
+                new PrivilegedAction<ProtectionDomain>() {
+                    @Override
+                    public ProtectionDomain run() {
+                        return trustedClass.getProtectionDomain();
+                    }
+                }
+            );
+            defineClassProtectionDomain(name, trustedClass, pd);
+        }
+        return trustedClass;
+    }
+
     // true if the name is null or has the potential to be a valid binary name
     private boolean checkName(String name) {
         if ((name == null) || (name.length() == 0))
diff --git a/jdk/src/share/classes/java/net/AggressiveCDSPlugin.java b/jdk/src/share/classes/java/net/AggressiveCDSPlugin.java
new file mode 100644
index 000000000..90d1cd78a
--- /dev/null
+++ b/jdk/src/share/classes/java/net/AggressiveCDSPlugin.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2020, 2023, Huawei Technologies Co., Ltd. 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.
+ */
+
+package java.net;
+
+import java.security.AccessController;
+import sun.security.action.GetBooleanAction;
+
+/**
+ * The Aggressive CDS plugin for {@link java.net.URLClassLoader}.
+ */
+final class AggressiveCDSPlugin {
+    private static final boolean IS_ENABLED =
+        AccessController.doPrivileged(
+            new GetBooleanAction("jdk.jbooster.aggressivecds.load"));
+
+    /**
+     * Check whether Aggressive CDS is enabled.
+     *
+     * @return Is Aggressive CDS enabled
+     */
+    public static boolean isEnabled() {
+        return IS_ENABLED;
+    }
+}
\ No newline at end of file
diff --git a/jdk/src/share/classes/java/net/URLClassLoader.java b/jdk/src/share/classes/java/net/URLClassLoader.java
index 876a88842..495964ee7 100644
--- a/jdk/src/share/classes/java/net/URLClassLoader.java
+++ b/jdk/src/share/classes/java/net/URLClassLoader.java
@@ -382,6 +382,17 @@ public class URLClassLoader extends SecureClassLoader implements Closeable {
             result = AccessController.doPrivileged(
                 new PrivilegedExceptionAction<Class<?>>() {
                     public Class<?> run() throws ClassNotFoundException {
+                        if (AggressiveCDSPlugin.isEnabled()) {
+                            Class<?> trustedClass = defineClass(name);
+                            if (trustedClass != null) {
+                                int i = name.lastIndexOf('.');
+                                if (i != -1) {
+                                    String pkgname = name.substring(0, i);
+                                    definePackageInternal(pkgname, null, null);
+                                }
+                                return trustedClass;
+                            }
+                        }
                         String path = name.replace('.', '/').concat(".class");
                         Resource res = ucp.getResource(path, false);
                         if (res != null) {
@@ -409,6 +420,22 @@ public class URLClassLoader extends SecureClassLoader implements Closeable {
         return result;
     }
 
+    /**
+     * get ProtectionDomain By URL String.
+     * This method is invoked only in C++ for AggressiveCDS.
+     *
+     * @param urlNoFragString the URL String.
+     *
+     * @return ProtectionDomain create from URL.
+     */
+    protected ProtectionDomain getProtectionDomainByURLString(String urlNoFragString) {
+        URL url = ucp.getURL(urlNoFragString);
+        if (url != null) {
+            return getProtectionDomainFromURL(url);
+        }
+        return null;
+    }
+
     /*
      * Retrieve the package using the specified package name.
      * If non-null, verify the package using the specified code
diff --git a/jdk/src/share/classes/java/security/ProtectionDomain.java b/jdk/src/share/classes/java/security/ProtectionDomain.java
index 7a86115e2..727dc4427 100644
--- a/jdk/src/share/classes/java/security/ProtectionDomain.java
+++ b/jdk/src/share/classes/java/security/ProtectionDomain.java
@@ -25,6 +25,7 @@
 
 package java.security;
 
+import java.net.URL;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Enumeration;
@@ -35,6 +36,7 @@ import sun.misc.JavaSecurityAccess;
 import sun.misc.JavaSecurityProtectionDomainAccess;
 import static sun.misc.JavaSecurityProtectionDomainAccess.ProtectionDomainCache;
 import sun.misc.SharedSecrets;
+import sun.net.util.URLUtil;
 import sun.security.util.Debug;
 import sun.security.util.SecurityConstants;
 
@@ -206,6 +208,20 @@ public class ProtectionDomain {
         return this.codesource;
     }
 
+    /**
+     * Returns a URL String.
+     *
+     * @return URL String.
+     */
+    public String getLocationNoFragString() {
+        if (codesource != null) {
+            URL url = codesource.getLocation();
+            if (url != null) {
+                return URLUtil.urlNoFragString(url);
+            }
+        }
+        return null;
+    }
 
     /**
      * Returns the ClassLoader of this domain.
diff --git a/jdk/src/share/classes/java/security/SecureClassLoader.java b/jdk/src/share/classes/java/security/SecureClassLoader.java
index cb5f017ba..4b0570104 100644
--- a/jdk/src/share/classes/java/security/SecureClassLoader.java
+++ b/jdk/src/share/classes/java/security/SecureClassLoader.java
@@ -215,6 +215,18 @@ public class SecureClassLoader extends ClassLoader {
         return pd;
     }
 
+    /**
+     * get ProtectionDomain From URL.
+     * This method is only for AggressiveCDS.
+     *
+     * @param url the URL.
+     *
+     * @return ProtectionDomain create from URL.
+     */
+    protected ProtectionDomain getProtectionDomainFromURL(URL url) {
+        CodeSource cs = new CodeSource(url, (CodeSigner[]) null);
+        return getProtectionDomain(cs);
+    }
 
     /*
      * Check to make sure the class loader has been initialized.
diff --git a/jdk/src/share/classes/sun/misc/URLClassPath.java b/jdk/src/share/classes/sun/misc/URLClassPath.java
index 70a194f50..6b4987cf3 100644
--- a/jdk/src/share/classes/sun/misc/URLClassPath.java
+++ b/jdk/src/share/classes/sun/misc/URLClassPath.java
@@ -255,6 +255,24 @@ public class URLClassPath {
         return null;
     }
 
+    /**
+     * Finds the URL which has the specified name.
+     * This method is only for AggressiveCDS.
+     *
+     * @param urlNoFragString the name of URL
+     * @return the URL, or null if not found
+     */
+    public URL getURL(String urlNoFragString) {
+        if (!urls.isEmpty()) {
+            int index = loaders.size();
+            while(getLoader(index) != null) {
+                index++;
+            }
+        }
+        Loader loader = lmap.get(urlNoFragString);
+        return loader != null ? loader.getBaseURL() : null;
+    }
+
     /**
      * Finds all resources on the URL search path with the given name.
      * Returns an enumeration of the URL objects.
diff --git a/jdk/src/share/javavm/export/jvm.h b/jdk/src/share/javavm/export/jvm.h
index d27055622..c37f2ad34 100644
--- a/jdk/src/share/javavm/export/jvm.h
+++ b/jdk/src/share/javavm/export/jvm.h
@@ -1441,6 +1441,11 @@ JVM_AdaptiveHeapSetG1PeriodicGCLoadThreshold(JNIEnv *env, jclass clazz, jint loa
 JNIEXPORT jint JNICALL
 JVM_AdaptiveHeapGetG1PeriodicGCLoadThreshold(JNIEnv *env, jclass clazz);
 
+/**
+ * Define the trusted shared class.
+ */
+JNIEXPORT jclass JNICALL
+JVM_DefineTrustedSharedClass(JNIEnv *env, const char *name, jobject loader);
 
 /* =========================================================================
  * The following defines a private JVM interface that the JDK can query
diff --git a/jdk/src/share/native/java/lang/ClassLoader.c b/jdk/src/share/native/java/lang/ClassLoader.c
index 40b0b85bc..a5515f72f 100644
--- a/jdk/src/share/native/java/lang/ClassLoader.c
+++ b/jdk/src/share/native/java/lang/ClassLoader.c
@@ -224,6 +224,31 @@ Java_java_lang_ClassLoader_defineClass2(JNIEnv *env,
     return result;
 }
 
+JNIEXPORT jclass JNICALL
+Java_java_lang_ClassLoader_defineClass3(JNIEnv *env,
+                                        jobject loader,
+                                        jstring name)
+{
+    char *utfName;
+    jclass result = 0;
+    char buf[128];
+
+    if (name != NULL) {
+        utfName = getUTF(env, name, buf, sizeof(buf));
+        if (utfName == NULL) {
+            JNU_ThrowOutOfMemoryError(env, NULL);
+            return result;
+        }
+        VerifyFixClassname(utfName);
+    } else {
+        utfName = NULL;
+    }
+
+    result = JVM_DefineTrustedSharedClass(env, utfName, loader);
+
+    return result;
+}
+
 JNIEXPORT void JNICALL
 Java_java_lang_ClassLoader_resolveClass0(JNIEnv *env, jobject this,
                                          jclass cls)
-- 
2.23.0

