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diff --git a/hotspot/src/share/vm/classfile/classFileParser.cpp b/hotspot/src/share/vm/classfile/classFileParser.cpp
index f27d04d0..306315e9 100644
--- a/hotspot/src/share/vm/classfile/classFileParser.cpp
+++ b/hotspot/src/share/vm/classfile/classFileParser.cpp
@@ -4022,8 +4022,12 @@ instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name,
if (_host_klass == NULL && SystemDictionaryShared::is_sharing_possible(loader_data)) {
if (name != NULL) {
ResourceMark rm(THREAD);
- classlist_file->print_cr("%s", name->as_C_string());
- classlist_file->flush();
+ char *class_name = name->as_C_string();
+ // TODO Skip JFR-related classes in classlist file to avoid conflicts between appcds and jfr.
+ if ((class_name != NULL) && (strstr(class_name, "jfr") == NULL)) {
+ classlist_file->print_cr("%s", class_name);
+ classlist_file->flush();
+ }
}
}
}
diff --git a/hotspot/src/share/vm/classfile/systemDictionary.cpp b/hotspot/src/share/vm/classfile/systemDictionary.cpp
index d27bf484..3f28d38e 100644
--- a/hotspot/src/share/vm/classfile/systemDictionary.cpp
+++ b/hotspot/src/share/vm/classfile/systemDictionary.cpp
@@ -1283,41 +1283,43 @@ instanceKlassHandle SystemDictionary::load_shared_class(
// null) or the same class loader is used to load previously
// defined class
bool bFound = false;
- if (class_loader.is_null()) {
- // condition1: Bootstrap class loader loaded
- bFound = (ik()->class_loader_data() == NULL || ik()->class_loader_data()->is_the_null_class_loader_data());
- } else if (ik()->class_loader_data() != NULL) {
- // condition2: App Class Loader
- // condition3: ExtClass Loader
- // Condition4: not fake class Loader, real one
- bFound = ((ik->has_fake_loader_data_App() && SystemDictionary::is_app_class_loader(class_loader)) ||
- (ik->has_fake_loader_data_Ext() && SystemDictionary::is_ext_class_loader(class_loader)) ||
- (!ik->has_fake_loader_data() && ik()->class_loader() == class_loader()));
- }
- if (!bFound) {
- return instanceKlassHandle();
- }
+ if (class_loader.is_null()) {
+ // condition1: Bootstrap class loader loaded
+ bFound = (ik()->class_loader_data() == NULL || ik()->class_loader_data()->is_the_null_class_loader_data());
+ } else if (ik()->class_loader_data() != NULL) {
+ // condition2: App Class Loader
+ // condition3: ExtClass Loader
+ // condition4: not fake class Loader, real one
+ bFound = ((ik->has_fake_loader_data_App() && SystemDictionary::is_app_class_loader(class_loader)) ||
+ (ik->has_fake_loader_data_Ext() && SystemDictionary::is_ext_class_loader(class_loader)) ||
+ (!ik->has_fake_loader_data() && ik()->class_loader() == class_loader()));
+ }
+ if (!bFound) {
+ return instanceKlassHandle();
+ }
- // get protection domain for this class if not loaded by null class loader
- if (class_loader.not_null()) {
- ResourceMark rm(THREAD);
- char* name = ik->name()->as_C_string();
- Handle klass_name = java_lang_String::create_from_str(name, CHECK_0);
- JavaValue result(T_OBJECT);
-
- // ClassLoaderData* loader_data = ClassLoaderData::class_loader_data(class_loader());
- JavaCalls::call_virtual(&result,
- class_loader,
- KlassHandle(THREAD, SystemDictionary::URLClassLoader_klass()),
- vmSymbols::getProtectionDomainInternal_name(),
- vmSymbols::getProtectionDomainInternal_signature(),
- klass_name,
- THREAD);
- return load_shared_class(ik, class_loader, Handle(THREAD, (oop) result.get_jobject()), THREAD);
- } else {
- return load_shared_class(ik, class_loader, Handle(), THREAD);
- }
+ // get protection domain for this class if not loaded by null class loader
+ if (class_loader.not_null()) {
+ ResourceMark rm(THREAD);
+ char* name = ik->name()->as_C_string();
+ Handle klass_name = java_lang_String::create_from_str(name, CHECK_0);
+ JavaValue result(T_OBJECT);
+
+ // load_shared_class need protected domain to handle non-bootstrap loaded class,
+ // so here call_virtual to call getProtectionDomainInternal function of URLClassLoader.java,
+ // to get protected domain and save into result.
+ JavaCalls::call_virtual(&result,
+ class_loader,
+ KlassHandle(THREAD, SystemDictionary::URLClassLoader_klass()),
+ vmSymbols::getProtectionDomainInternal_name(),
+ vmSymbols::getProtectionDomainInternal_signature(),
+ klass_name,
+ THREAD);
+ return load_shared_class(ik, class_loader, Handle(THREAD, (oop) result.get_jobject()), THREAD);
+ } else {
+ return load_shared_class(ik, class_loader, Handle(), THREAD);
}
+ }
}
return instanceKlassHandle();
}
@@ -1396,8 +1398,12 @@ instanceKlassHandle SystemDictionary::load_shared_class(instanceKlassHandle ik,
// unless AppCDS is enabled
if (SystemDictionaryShared::is_sharing_possible(loader_data)) {
ResourceMark rm(THREAD);
- classlist_file->print_cr("%s", ik->name()->as_C_string());
- classlist_file->flush();
+ char *class_name = ik->name()->as_C_string();
+ // TODO Skip JFR-related classes in classlist file to avoid conflicts between appcds and jfr.
+ if ((class_name != NULL) && (strstr(class_name, "jfr") == NULL)) {
+ classlist_file->print_cr("%s", class_name);
+ classlist_file->flush();
+ }
}
}
@@ -1472,8 +1478,10 @@ instanceKlassHandle SystemDictionary::load_instance_class(Symbol* class_name, Ha
// the call stack. Bootstrap classloader is parallel-capable,
// so no concurrency issues are expected.
CLEAR_PENDING_EXCEPTION;
- k = JfrUpcalls::load_event_handler_proxy_class(THREAD);
- assert(!k.is_null(), "invariant");
+ if (!DumpSharedSpaces) {
+ k = JfrUpcalls::load_event_handler_proxy_class(THREAD);
+ assert(!k.is_null(), "invariant");
+ }
}
#endif
diff --git a/hotspot/src/share/vm/classfile/systemDictionaryShared.hpp b/hotspot/src/share/vm/classfile/systemDictionaryShared.hpp
index a8dbda2e..1bd61b02 100644
--- a/hotspot/src/share/vm/classfile/systemDictionaryShared.hpp
+++ b/hotspot/src/share/vm/classfile/systemDictionaryShared.hpp
@@ -28,6 +28,7 @@
#include "classfile/dictionary.hpp"
#include "classfile/systemDictionary.hpp"
+#include "verifier.hpp"
class SystemDictionaryShared: public SystemDictionary {
public:
@@ -70,7 +71,16 @@ public:
static void finalize_verification_dependencies() {}
static bool check_verification_dependencies(Klass* k, Handle class_loader,
Handle protection_domain,
- char** message_buffer, TRAPS) {return true;}
+ char** message_buffer, TRAPS) {
+ if (EnableSplitVerifierForAppCDS) {
+ ClassVerifier split_verifier(k, THREAD);
+ split_verifier.verify_class(THREAD);
+ if (HAS_PENDING_EXCEPTION) {
+ return false; // use the existing exception
+ }
+ }
+ return true;
+ }
};
#endif // SHARE_VM_CLASSFILE_SYSTEMDICTIONARYSHARED_HPP
diff --git a/hotspot/src/share/vm/classfile/verifier.cpp b/hotspot/src/share/vm/classfile/verifier.cpp
index 9923058b..eb267b83 100644
--- a/hotspot/src/share/vm/classfile/verifier.cpp
+++ b/hotspot/src/share/vm/classfile/verifier.cpp
@@ -561,7 +561,8 @@ void ClassVerifier::verify_class(TRAPS) {
for (int index = 0; index < num_methods; index++) {
// Check for recursive re-verification before each method.
- if (was_recursively_verified()) return;
+ // in CDS Sharing state we still verify the code.
+ if (!UseAppCDS && was_recursively_verified()) return;
Method* m = methods->at(index);
if (m->is_native() || m->is_abstract() || m->is_overpass()) {
diff --git a/hotspot/src/share/vm/memory/filemap.cpp b/hotspot/src/share/vm/memory/filemap.cpp
index 17447587..d2095e63 100644
--- a/hotspot/src/share/vm/memory/filemap.cpp
+++ b/hotspot/src/share/vm/memory/filemap.cpp
@@ -22,6 +22,7 @@
*
*/
+#include "jvm.h"
#include "precompiled.hpp"
#include "classfile/classLoader.hpp"
#include "classfile/sharedClassUtil.hpp"
@@ -33,10 +34,13 @@
#include "memory/oopFactory.hpp"
#include "oops/objArrayOop.hpp"
#include "runtime/arguments.hpp"
+#include "runtime/globals.hpp"
#include "runtime/java.hpp"
#include "runtime/os.hpp"
#include "services/memTracker.hpp"
+#include "utilities/debug.hpp"
#include "utilities/defaultStream.hpp"
+#include "utilities/ostream.hpp"
# include <sys/stat.h>
# include <errno.h>
@@ -362,11 +366,33 @@ bool FileMapInfo::open_for_read() {
return true;
}
-
// Write the FileMapInfo information to the file.
-
void FileMapInfo::open_for_write() {
- _full_path = make_log_name(Arguments::GetSharedArchivePath(), NULL);
+ if (UseAppCDS && AppCDSLockFile != NULL) {
+ char* pos = strrchr(const_cast<char*>(AppCDSLockFile), '/');
+ if (pos != NULL && pos != AppCDSLockFile) { // No directory path specified
+ char buf[PATH_MAX + 1] = "\0";
+ char filePath[PATH_MAX] = "\0";
+ int length = pos - AppCDSLockFile + 1;
+ strncpy(filePath, AppCDSLockFile, length);
+ if (realpath(filePath, buf) == NULL) {
+ fail_stop("A risky filePath:%s, buf:%s, length:%d", filePath, buf, length);
+ }
+ _appcds_file_lock_path = os::strdup(AppCDSLockFile, mtInternal);
+ if (_appcds_file_lock_path == NULL) {
+ fail_stop("Failed to create appcds file lock.");
+ }
+ int lock_fd = open(_appcds_file_lock_path, O_CREAT | O_WRONLY | O_EXCL, S_IRUSR | S_IWUSR);
+ if (lock_fd < 0) {
+ tty->print_cr("The lock path is: %s", _appcds_file_lock_path);
+ tty->print_cr("Failed to create jsa file !\n Please check: \n 1. The directory exists.\n "
+ "2. You have the permission.\n 3. Make sure no other process using the same lock file.\n");
+ JVM_Halt(0);
+ }
+ tty->print_cr("You are using file lock %s in concurrent mode", AppCDSLockFile);
+ }
+ }
+ _full_path = make_log_name(Arguments::GetSharedArchivePath(), NULL);
if (PrintSharedSpaces) {
tty->print_cr("Dumping shared data to file: ");
tty->print_cr(" %s", _full_path);
@@ -452,6 +478,7 @@ void FileMapInfo::write_bytes(const void* buffer, int nbytes) {
// close and remove the file. See bug 6372906.
close();
remove(_full_path);
+ remove(_appcds_file_lock_path);
fail_stop("Unable to write to shared archive file.");
}
}
@@ -492,6 +519,10 @@ void FileMapInfo::write_bytes_aligned(const void* buffer, int nbytes) {
// Close the shared archive file. This does NOT unmap mapped regions.
void FileMapInfo::close() {
+ if (UseAppCDS && AppCDSLockFile != NULL) {
+ // delete appcds.lock
+ remove(_appcds_file_lock_path);
+ }
if (_file_open) {
if (::close(_fd) < 0) {
fail_stop("Unable to close the shared archive file.");
diff --git a/hotspot/src/share/vm/memory/filemap.hpp b/hotspot/src/share/vm/memory/filemap.hpp
index acff6c9d..c09fbca1 100644
--- a/hotspot/src/share/vm/memory/filemap.hpp
+++ b/hotspot/src/share/vm/memory/filemap.hpp
@@ -143,6 +143,7 @@ public:
FileMapHeader * _header;
const char* _full_path;
+ const char* _appcds_file_lock_path;
char* _paths_misc_info;
static FileMapInfo* _current_info;
diff --git a/hotspot/src/share/vm/runtime/arguments.cpp b/hotspot/src/share/vm/runtime/arguments.cpp
index 073c38ac..ebb5e114 100644
--- a/hotspot/src/share/vm/runtime/arguments.cpp
+++ b/hotspot/src/share/vm/runtime/arguments.cpp
@@ -36,6 +36,7 @@
#include "prims/jvmtiExport.hpp"
#include "runtime/arguments.hpp"
#include "runtime/arguments_ext.hpp"
+#include "runtime/globals.hpp"
#include "runtime/globals_extension.hpp"
#include "runtime/java.hpp"
#include "services/management.hpp"
@@ -1493,7 +1494,6 @@ void Arguments::set_use_compressed_oops() {
// the only value that can override MaxHeapSize if we are
// to use UseCompressedOops is InitialHeapSize.
size_t max_heap_size = MAX2(MaxHeapSize, InitialHeapSize);
-
if (max_heap_size <= max_heap_for_compressed_oops()) {
#if !defined(COMPILER1) || defined(TIERED)
if (FLAG_IS_DEFAULT(UseCompressedOops)) {
@@ -3023,9 +3023,6 @@ jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
if (!process_argument("+UseAppCDS", args->ignoreUnrecognized, origin)) {
return JNI_EINVAL;
} else {
- const char* n = "SharedArchiveFile";
- Flag* shared_archive_flag = Flag::find_flag(n, strlen(n), true, true);
- shared_archive_flag->unlock_diagnostic();
FLAG_SET_CMDLINE(bool, UseAppCDS, true);
}
}
@@ -3382,6 +3379,9 @@ jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
} else if (match_option(option, "-Xshare:off", &tail)) {
FLAG_SET_CMDLINE(bool, UseSharedSpaces, false);
FLAG_SET_CMDLINE(bool, RequireSharedSpaces, false);
+ // -Xtypecheck
+ } else if (match_option(option, "-Xtypecheck:on", &tail)) {
+ FLAG_SET_CMDLINE(bool, EnableSplitVerifierForAppCDS, true);
// -Xverify
} else if (match_option(option, "-Xverify", &tail)) {
if (strcmp(tail, ":all") == 0 || strcmp(tail, "") == 0) {
@@ -3632,7 +3632,10 @@ jint Arguments::parse_each_vm_init_arg(const JavaVMInitArgs* args,
FLAG_SET_CMDLINE(bool, RequireSharedSpaces, true);
FLAG_SET_CMDLINE(bool, TraceClassPaths, true);
}
-
+ if (DumpSharedSpaces && !UseAppCDS && AppCDSLockFile != NULL) {
+ jio_fprintf(defaultStream::error_stream(), "AppCDSLockFile is only used when AppCDS is enabled.");
+ return JNI_ERR;
+ }
// Change the default value for flags which have different default values
// when working with older JDKs.
#ifdef LINUX
@@ -4057,6 +4060,7 @@ static char* get_shared_archive_path() {
return shared_archive_path;
}
+
#ifndef PRODUCT
// Determine whether LogVMOutput should be implicitly turned on.
static bool use_vm_log() {
@@ -4199,6 +4203,7 @@ jint Arguments::parse(const JavaVMInitArgs* args) {
return JNI_ENOMEM;
}
+
// Set up VerifySharedSpaces
if (FLAG_IS_DEFAULT(VerifySharedSpaces) && SharedArchiveFile != NULL) {
VerifySharedSpaces = true;
diff --git a/hotspot/src/share/vm/runtime/arguments.hpp b/hotspot/src/share/vm/runtime/arguments.hpp
index 6f7ff138..03f293e3 100644
--- a/hotspot/src/share/vm/runtime/arguments.hpp
+++ b/hotspot/src/share/vm/runtime/arguments.hpp
@@ -473,6 +473,7 @@ class Arguments : AllStatic {
static bool CheckCompileOnly;
static char* SharedArchivePath;
+ static char* AppCDSLockPath;
public:
// Parses the arguments, first phase
diff --git a/hotspot/src/share/vm/runtime/globals.hpp b/hotspot/src/share/vm/runtime/globals.hpp
index 65b11caa..b72efd45 100644
--- a/hotspot/src/share/vm/runtime/globals.hpp
+++ b/hotspot/src/share/vm/runtime/globals.hpp
@@ -4007,15 +4007,21 @@ class CommandLineFlags {
product(ccstr, SharedClassListFile, NULL, \
"Override the default CDS class list") \
\
- diagnostic(ccstr, SharedArchiveFile, NULL, \
+ product(ccstr, SharedArchiveFile, NULL, \
"Override the default location of the CDS archive file") \
\
+ product(ccstr, AppCDSLockFile, NULL, \
+ "Override the default location of the AppCDS lock file") \
+ \
product(ccstr, ExtraSharedClassListFile, NULL, \
"Extra classlist for building the CDS archive file") \
\
product(bool, UseAppCDS, false, \
"Enable Application Class Data Sharing (AppCDS)") \
\
+ product(bool, EnableSplitVerifierForAppCDS, false, \
+ "Enable Type Check (AppCDS)") \
+ \
experimental(uintx, ArrayAllocatorMallocLimit, \
SOLARIS_ONLY(64*K) NOT_SOLARIS(max_uintx), \
"Allocation less than this value will be allocated " \
diff --git a/hotspot/src/share/vm/utilities/ostream.cpp b/hotspot/src/share/vm/utilities/ostream.cpp
index 2b458fe4..587b839b 100644
--- a/hotspot/src/share/vm/utilities/ostream.cpp
+++ b/hotspot/src/share/vm/utilities/ostream.cpp
@@ -34,6 +34,9 @@
#include "utilities/ostream.hpp"
#include "utilities/top.hpp"
#include "utilities/xmlstream.hpp"
+
+# include <sys/file.h>
+
#ifdef TARGET_OS_FAMILY_linux
# include "os_linux.inline.hpp"
#endif
@@ -376,7 +379,7 @@ stringStream::~stringStream() {}
xmlStream* xtty;
outputStream* tty;
outputStream* gclog_or_tty;
-CDS_ONLY(fileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive
+CDS_ONLY(jsaFileStream* classlist_file;) // Only dump the classes that can be stored into the CDS archive
extern Mutex* tty_lock;
#define EXTRACHARLEN 32
@@ -760,6 +763,36 @@ void fileStream::flush() {
fflush(_file);
}
+jsaFileStream::jsaFileStream(const char* file_name) : fileStream(file_name, "a") {
+ if (_file != NULL) {
+ if (flock(fileno(_file), LOCK_EX | LOCK_NB) != 0) {
+ if (errno == EWOULDBLOCK) {
+ warning("file %s is locked by another process\n", file_name);
+ } else {
+ warning("Cannot lock file %s due to %s\n", file_name, strerror(errno));
+ }
+ fclose(_file);
+ _file = NULL;
+ _need_close = false;
+ } else {
+ if (::ftruncate(fileno(_file), 0) != 0) {
+ warning("Fail to ftruncate file %s due to %s\n", file_name, strerror(errno));
+ }
+ ::rewind(_file);
+ }
+ }
+}
+
+jsaFileStream::~jsaFileStream() {
+ // flock is released automatically when _file is closed
+ // Ensure the following sequnce in fclose
+ // 1. fflush. 2. flock(unlock); 3. close
+ if (_file != NULL) {
+ if (_need_close) fclose(_file);
+ _file = NULL;
+ }
+}
+
fdStream::fdStream(const char* file_name) {
_fd = open(file_name, O_WRONLY | O_CREAT | O_TRUNC, 0666);
_need_close = true;
@@ -1362,7 +1395,7 @@ void ostream_init_log() {
if (DumpLoadedClassList != NULL) {
const char* list_name = make_log_name(DumpLoadedClassList, NULL);
classlist_file = new(ResourceObj::C_HEAP, mtInternal)
- fileStream(list_name);
+ jsaFileStream(list_name);
FREE_C_HEAP_ARRAY(char, list_name, mtInternal);
}
#endif
diff --git a/hotspot/src/share/vm/utilities/ostream.hpp b/hotspot/src/share/vm/utilities/ostream.hpp
index 530c523c..c69289fb 100644
--- a/hotspot/src/share/vm/utilities/ostream.hpp
+++ b/hotspot/src/share/vm/utilities/ostream.hpp
@@ -214,7 +214,13 @@ class fileStream : public outputStream {
void flush();
};
-CDS_ONLY(extern fileStream* classlist_file;)
+class jsaFileStream : public fileStream {
+ public:
+ jsaFileStream(const char* file_name);
+ ~jsaFileStream();
+};
+
+CDS_ONLY(extern jsaFileStream* classlist_file;)
// unlike fileStream, fdStream does unbuffered I/O by calling
// open() and write() directly. It is async-safe, but output
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