author | rprotacio |
Wed, 26 Oct 2016 15:46:13 -0400 | |
changeset 42059 | 36a9d4ce3951 |
parent 41281 | e1dc38ba642f |
child 41741 | 2f5b8bbcb18c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_CLASSFILE_CLASSLOADER_HPP |
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#define SHARE_VM_CLASSFILE_CLASSLOADER_HPP |
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#include "runtime/orderAccess.hpp" |
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#include "runtime/perfData.hpp" |
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#include "utilities/exceptions.hpp" |
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#include "utilities/macros.hpp" |
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// The VM class loader. |
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#include <sys/stat.h> |
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// Name of boot "modules" image |
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#define MODULES_IMAGE_NAME "modules" |
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// Name of the resource containing mapping from module names to defining class loader type |
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#define MODULE_LOADER_MAP "jdk/internal/vm/cds/resources/ModuleLoaderMap.dat" |
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// Initial sizes of the following arrays are based on the generated ModuleLoaderMap.dat |
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#define INITIAL_BOOT_MODULES_ARRAY_SIZE 30 |
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#define INITIAL_PLATFORM_MODULES_ARRAY_SIZE 15 |
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// Class path entry (directory or zip file) |
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class JImageFile; |
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class ClassFileStream; |
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class ClassPathEntry : public CHeapObj<mtClass> { |
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private: |
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ClassPathEntry* volatile _next; |
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public: |
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// Next entry in class path |
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ClassPathEntry* next() const { |
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return (ClassPathEntry*) OrderAccess::load_ptr_acquire(&_next); |
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} |
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void set_next(ClassPathEntry* next) { |
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// may have unlocked readers, so ensure visibility. |
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OrderAccess::release_store_ptr(&_next, next); |
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} |
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virtual bool is_jrt() = 0; |
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virtual bool is_jar_file() const = 0; |
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virtual const char* name() const = 0; |
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virtual JImageFile* jimage() const = 0; |
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// Constructor |
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ClassPathEntry() : _next(NULL) {} |
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// Attempt to locate file_name through this class path entry. |
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// Returns a class file parsing stream if successfull. |
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virtual ClassFileStream* open_stream(const char* name, TRAPS) = 0; |
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virtual bool stream_exists(const char* name) = 0; |
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// Debugging |
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NOT_PRODUCT(virtual void compile_the_world(Handle loader, TRAPS) = 0;) |
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}; |
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class ClassPathDirEntry: public ClassPathEntry { |
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private: |
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const char* _dir; // Name of directory |
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public: |
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bool is_jrt() { return false; } |
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bool is_jar_file() const { return false; } |
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const char* name() const { return _dir; } |
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JImageFile* jimage() const { return NULL; } |
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ClassPathDirEntry(const char* dir); |
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ClassFileStream* open_stream(const char* name, TRAPS); |
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bool stream_exists(const char* name) { return false; } |
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// Debugging |
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NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);) |
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}; |
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// Type definitions for zip file and zip file entry |
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typedef void* jzfile; |
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typedef struct { |
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char *name; /* entry name */ |
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jlong time; /* modification time */ |
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jlong size; /* size of uncompressed data */ |
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jlong csize; /* size of compressed data (zero if uncompressed) */ |
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jint crc; /* crc of uncompressed data */ |
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char *comment; /* optional zip file comment */ |
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jbyte *extra; /* optional extra data */ |
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jlong pos; /* position of LOC header (if negative) or data */ |
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} jzentry; |
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class ClassPathZipEntry: public ClassPathEntry { |
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enum { |
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_unknown = 0, |
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_yes = 1, |
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_no = 2 |
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}; |
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private: |
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jzfile* _zip; // The zip archive |
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const char* _zip_name; // Name of zip archive |
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bool _is_boot_append; // entry coming from -Xbootclasspath/a |
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u1 _multi_versioned; // indicates if the jar file has multi-versioned entries. |
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// It can have value of "_unknown", "_yes", or "_no" |
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public: |
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bool is_jrt() { return false; } |
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bool is_jar_file() const { return true; } |
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const char* name() const { return _zip_name; } |
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JImageFile* jimage() const { return NULL; } |
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ClassPathZipEntry(jzfile* zip, const char* zip_name, bool is_boot_append); |
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~ClassPathZipEntry(); |
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u1* open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS); |
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u1* open_versioned_entry(const char* name, jint* filesize, TRAPS) NOT_CDS_RETURN_(NULL); |
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ClassFileStream* open_stream(const char* name, TRAPS); |
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void contents_do(void f(const char* name, void* context), void* context); |
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bool is_multiple_versioned(TRAPS) NOT_CDS_RETURN_(false); |
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bool stream_exists(const char* name); |
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// Debugging |
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NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);) |
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}; |
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// For java image files |
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class ClassPathImageEntry: public ClassPathEntry { |
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private: |
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JImageFile* _jimage; |
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const char* _name; |
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public: |
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bool is_jrt(); |
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bool is_jar_file() const { return false; } |
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bool is_open() const { return _jimage != NULL; } |
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const char* name() const { return _name == NULL ? "" : _name; } |
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JImageFile* jimage() const { return _jimage; } |
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ClassPathImageEntry(JImageFile* jimage, const char* name); |
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~ClassPathImageEntry(); |
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ClassFileStream* open_stream(const char* name, TRAPS); |
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bool stream_exists(const char* name) { return false; } |
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// Debugging |
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NOT_PRODUCT(void compile_the_world(Handle loader, TRAPS);) |
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}; |
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// ModuleClassPathList contains a linked list of ClassPathEntry's |
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// that have been specified for a specific module. Currently, |
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// the only way to specify a module/path pair is via the --patch-module |
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// command line option. |
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class ModuleClassPathList : public CHeapObj<mtClass> { |
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private: |
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Symbol* _module_name; |
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// First and last entries of class path entries for a specific module |
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ClassPathEntry* _module_first_entry; |
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ClassPathEntry* _module_last_entry; |
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public: |
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Symbol* module_name() const { return _module_name; } |
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ClassPathEntry* module_first_entry() const { return _module_first_entry; } |
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ModuleClassPathList(Symbol* module_name); |
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~ModuleClassPathList(); |
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void add_to_list(ClassPathEntry* new_entry); |
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}; |
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class SharedPathsMiscInfo; |
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class ClassLoader: AllStatic { |
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public: |
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enum ClassLoaderType { |
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BOOT_LOADER = 1, /* boot loader */ |
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PLATFORM_LOADER = 2, /* PlatformClassLoader */ |
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APP_LOADER = 3 /* AppClassLoader */ |
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}; |
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protected: |
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// Performance counters |
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static PerfCounter* _perf_accumulated_time; |
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static PerfCounter* _perf_classes_inited; |
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static PerfCounter* _perf_class_init_time; |
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static PerfCounter* _perf_class_init_selftime; |
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static PerfCounter* _perf_classes_verified; |
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static PerfCounter* _perf_class_verify_time; |
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static PerfCounter* _perf_class_verify_selftime; |
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static PerfCounter* _perf_classes_linked; |
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static PerfCounter* _perf_class_link_time; |
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static PerfCounter* _perf_class_link_selftime; |
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static PerfCounter* _perf_class_parse_time; |
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static PerfCounter* _perf_class_parse_selftime; |
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static PerfCounter* _perf_sys_class_lookup_time; |
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static PerfCounter* _perf_shared_classload_time; |
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static PerfCounter* _perf_sys_classload_time; |
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static PerfCounter* _perf_app_classload_time; |
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static PerfCounter* _perf_app_classload_selftime; |
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static PerfCounter* _perf_app_classload_count; |
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static PerfCounter* _perf_define_appclasses; |
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static PerfCounter* _perf_define_appclass_time; |
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static PerfCounter* _perf_define_appclass_selftime; |
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static PerfCounter* _perf_app_classfile_bytes_read; |
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static PerfCounter* _perf_sys_classfile_bytes_read; |
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static PerfCounter* _sync_systemLoaderLockContentionRate; |
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static PerfCounter* _sync_nonSystemLoaderLockContentionRate; |
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static PerfCounter* _sync_JVMFindLoadedClassLockFreeCounter; |
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static PerfCounter* _sync_JVMDefineClassLockFreeCounter; |
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static PerfCounter* _sync_JNIDefineClassLockFreeCounter; |
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static PerfCounter* _unsafe_defineClassCallCounter; |
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static PerfCounter* _isUnsyncloadClass; |
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static PerfCounter* _load_instance_class_failCounter; |
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// The boot class path consists of 3 ordered pieces: |
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// 1. the module/path pairs specified to --patch-module |
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// --patch-module=<module>=<file>(<pathsep><file>)* |
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// 2. the base piece |
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// [jimage | build with exploded modules] |
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// 3. boot loader append path |
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// [-Xbootclasspath/a]; [jvmti appended entries] |
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// |
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// The boot loader must obey this order when attempting |
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// to load a class. |
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|
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// 1. Contains the module/path pairs specified to --patch-module |
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static GrowableArray<ModuleClassPathList*>* _patch_mod_entries; |
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234 |
|
40013 | 235 |
// 2. the base piece |
236 |
// Contains the ClassPathEntry of the modular java runtime image. |
|
237 |
// If no java runtime image is present, this indicates a |
|
238 |
// build with exploded modules is being used instead. |
|
239 |
static ClassPathEntry* _jrt_entry; |
|
240 |
static GrowableArray<ModuleClassPathList*>* _exploded_entries; |
|
241 |
enum { EXPLODED_ENTRY_SIZE = 80 }; // Initial number of exploded modules |
|
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242 |
|
40013 | 243 |
// 3. the boot loader's append path |
244 |
// [-Xbootclasspath/a]; [jvmti appended entries] |
|
245 |
// Note: boot loader append path does not support named modules. |
|
36508 | 246 |
static ClassPathEntry* _first_append_entry; |
40013 | 247 |
// Last entry in linked list of appended ClassPathEntry instances |
248 |
static ClassPathEntry* _last_append_entry; |
|
1 | 249 |
|
40013 | 250 |
// Note: _num_entries includes the java runtime image and all |
251 |
// the entries on the _first_append_entry linked list. |
|
252 |
static int _num_entries; |
|
36508 | 253 |
|
254 |
// Array of module names associated with the boot class loader |
|
255 |
CDS_ONLY(static GrowableArray<char*>* _boot_modules_array;) |
|
256 |
||
257 |
// Array of module names associated with the platform class loader |
|
258 |
CDS_ONLY(static GrowableArray<char*>* _platform_modules_array;) |
|
259 |
||
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// Info used by CDS |
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CDS_ONLY(static SharedPathsMiscInfo * _shared_paths_misc_info;) |
41281 | 262 |
CDS_ONLY(static int _num_patch_mod_prefixes;) |
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263 |
|
40013 | 264 |
// Initialization: |
265 |
// - setup the boot loader's system class path |
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// - setup the boot loader's patch mod entries, if present |
40013 | 267 |
// - create the ModuleEntry for java.base |
1 | 268 |
static void setup_bootstrap_search_path(); |
36508 | 269 |
static void setup_search_path(const char *class_path, bool setting_bootstrap); |
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static void setup_patch_mod_entries(); |
40013 | 271 |
static void create_javabase(); |
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|
1 | 273 |
static void load_zip_library(); |
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static void load_jimage_library(); |
26419 | 275 |
static ClassPathEntry* create_class_path_entry(const char *path, const struct stat* st, |
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bool throw_exception, |
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277 |
bool is_boot_append, TRAPS); |
1 | 278 |
|
36508 | 279 |
public: |
280 |
||
281 |
// If the package for the fully qualified class name is in the boot |
|
282 |
// loader's package entry table then add_package() sets the classpath_index |
|
283 |
// field so that get_system_package() will know to return a non-null value |
|
284 |
// for the package's location. And, so that the package will be added to |
|
285 |
// the list of packages returned by get_system_packages(). |
|
286 |
// For packages whose classes are loaded from the boot loader class path, the |
|
287 |
// classpath_index indicates which entry on the boot loader class path. |
|
288 |
static bool add_package(const char *fullq_class_name, s2 classpath_index, TRAPS); |
|
289 |
||
1 | 290 |
// Canonicalizes path names, so strcmp will work properly. This is mainly |
291 |
// to avoid confusing the zip library |
|
26419 | 292 |
static bool get_canonical_path(const char* orig, char* out, int len); |
34666 | 293 |
static const char* file_name_for_class_name(const char* class_name, |
294 |
int class_name_len); |
|
295 |
||
1 | 296 |
public: |
27562 | 297 |
static jboolean decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg); |
27025 | 298 |
static int crc32(int crc, const char* buf, int len); |
26419 | 299 |
static bool update_class_path_entry_list(const char *path, |
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bool check_for_duplicates, |
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bool is_boot_append, |
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bool throw_exception=true); |
1 | 303 |
static void print_bootclasspath(); |
304 |
||
305 |
// Timing |
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static PerfCounter* perf_accumulated_time() { return _perf_accumulated_time; } |
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static PerfCounter* perf_classes_inited() { return _perf_classes_inited; } |
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static PerfCounter* perf_class_init_time() { return _perf_class_init_time; } |
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static PerfCounter* perf_class_init_selftime() { return _perf_class_init_selftime; } |
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static PerfCounter* perf_classes_verified() { return _perf_classes_verified; } |
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static PerfCounter* perf_class_verify_time() { return _perf_class_verify_time; } |
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static PerfCounter* perf_class_verify_selftime() { return _perf_class_verify_selftime; } |
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static PerfCounter* perf_classes_linked() { return _perf_classes_linked; } |
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static PerfCounter* perf_class_link_time() { return _perf_class_link_time; } |
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static PerfCounter* perf_class_link_selftime() { return _perf_class_link_selftime; } |
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static PerfCounter* perf_class_parse_time() { return _perf_class_parse_time; } |
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317 |
static PerfCounter* perf_class_parse_selftime() { return _perf_class_parse_selftime; } |
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318 |
static PerfCounter* perf_sys_class_lookup_time() { return _perf_sys_class_lookup_time; } |
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static PerfCounter* perf_shared_classload_time() { return _perf_shared_classload_time; } |
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static PerfCounter* perf_sys_classload_time() { return _perf_sys_classload_time; } |
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static PerfCounter* perf_app_classload_time() { return _perf_app_classload_time; } |
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static PerfCounter* perf_app_classload_selftime() { return _perf_app_classload_selftime; } |
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static PerfCounter* perf_app_classload_count() { return _perf_app_classload_count; } |
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static PerfCounter* perf_define_appclasses() { return _perf_define_appclasses; } |
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static PerfCounter* perf_define_appclass_time() { return _perf_define_appclass_time; } |
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326 |
static PerfCounter* perf_define_appclass_selftime() { return _perf_define_appclass_selftime; } |
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static PerfCounter* perf_app_classfile_bytes_read() { return _perf_app_classfile_bytes_read; } |
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328 |
static PerfCounter* perf_sys_classfile_bytes_read() { return _perf_sys_classfile_bytes_read; } |
1 | 329 |
|
330 |
// Record how often system loader lock object is contended |
|
331 |
static PerfCounter* sync_systemLoaderLockContentionRate() { |
|
332 |
return _sync_systemLoaderLockContentionRate; |
|
333 |
} |
|
334 |
||
335 |
// Record how often non system loader lock object is contended |
|
336 |
static PerfCounter* sync_nonSystemLoaderLockContentionRate() { |
|
337 |
return _sync_nonSystemLoaderLockContentionRate; |
|
338 |
} |
|
339 |
||
340 |
// Record how many calls to JVM_FindLoadedClass w/o holding a lock |
|
341 |
static PerfCounter* sync_JVMFindLoadedClassLockFreeCounter() { |
|
342 |
return _sync_JVMFindLoadedClassLockFreeCounter; |
|
343 |
} |
|
344 |
||
345 |
// Record how many calls to JVM_DefineClass w/o holding a lock |
|
346 |
static PerfCounter* sync_JVMDefineClassLockFreeCounter() { |
|
347 |
return _sync_JVMDefineClassLockFreeCounter; |
|
348 |
} |
|
349 |
||
350 |
// Record how many calls to jni_DefineClass w/o holding a lock |
|
351 |
static PerfCounter* sync_JNIDefineClassLockFreeCounter() { |
|
352 |
return _sync_JNIDefineClassLockFreeCounter; |
|
353 |
} |
|
354 |
||
355 |
// Record how many calls to Unsafe_DefineClass |
|
356 |
static PerfCounter* unsafe_defineClassCallCounter() { |
|
357 |
return _unsafe_defineClassCallCounter; |
|
358 |
} |
|
359 |
||
360 |
// Record how many times SystemDictionary::load_instance_class call |
|
361 |
// fails with linkageError when Unsyncloadclass flag is set. |
|
362 |
static PerfCounter* load_instance_class_failCounter() { |
|
363 |
return _load_instance_class_failCounter; |
|
364 |
} |
|
365 |
||
40013 | 366 |
// Modular java runtime image is present vs. a build with exploded modules |
367 |
static bool has_jrt_entry() { return (_jrt_entry != NULL); } |
|
368 |
static ClassPathEntry* get_jrt_entry() { return _jrt_entry; } |
|
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369 |
|
40013 | 370 |
// Add a module's exploded directory to the boot loader's exploded module build list |
371 |
static void add_to_exploded_build_list(Symbol* module_name, TRAPS); |
|
36508 | 372 |
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373 |
// Attempt load of individual class from either the patched or exploded modules build lists |
40013 | 374 |
static ClassFileStream* search_module_entries(const GrowableArray<ModuleClassPathList*>* const module_list, |
375 |
const char* const class_name, |
|
376 |
const char* const file_name, TRAPS); |
|
36508 | 377 |
|
1 | 378 |
// Load individual .class file |
36508 | 379 |
static instanceKlassHandle load_class(Symbol* class_name, bool search_append_only, TRAPS); |
1 | 380 |
|
381 |
// If the specified package has been loaded by the system, then returns |
|
382 |
// the name of the directory or ZIP file that the package was loaded from. |
|
383 |
// Returns null if the package was not loaded. |
|
384 |
// Note: The specified name can either be the name of a class or package. |
|
385 |
// If a package name is specified, then it must be "/"-separator and also |
|
386 |
// end with a trailing "/". |
|
387 |
static oop get_system_package(const char* name, TRAPS); |
|
388 |
||
389 |
// Returns an array of Java strings representing all of the currently |
|
390 |
// loaded system packages. |
|
391 |
// Note: The package names returned are "/"-separated and end with a |
|
392 |
// trailing "/". |
|
393 |
static objArrayOop get_system_packages(TRAPS); |
|
394 |
||
395 |
// Initialization |
|
396 |
static void initialize(); |
|
40013 | 397 |
static void classLoader_init2(TRAPS); |
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398 |
CDS_ONLY(static void initialize_shared_path();) |
36508 | 399 |
|
1 | 400 |
static int compute_Object_vtable(); |
401 |
||
402 |
static ClassPathEntry* classpath_entry(int n) { |
|
40013 | 403 |
if (n == 0) { |
404 |
assert(has_jrt_entry(), "No class path entry at 0 for exploded module builds"); |
|
405 |
return ClassLoader::_jrt_entry; |
|
406 |
} else { |
|
407 |
// The java runtime image is always the first entry |
|
408 |
// in the FileMapInfo::_classpath_entry_table. Even though |
|
409 |
// the _jrt_entry is not included in the _first_append_entry |
|
410 |
// linked list, it must be accounted for when comparing the |
|
411 |
// class path vs. the shared archive class path. |
|
412 |
ClassPathEntry* e = ClassLoader::_first_append_entry; |
|
413 |
while (--n >= 1) { |
|
414 |
assert(e != NULL, "Not that many classpath entries."); |
|
415 |
e = e->next(); |
|
416 |
} |
|
417 |
return e; |
|
1 | 418 |
} |
419 |
} |
|
420 |
||
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|
421 |
#if INCLUDE_CDS |
1 | 422 |
// Sharing dump and restore |
423 |
||
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424 |
static void check_shared_classpath(const char *path); |
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static void finalize_shared_paths_misc_info(); |
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426 |
static int get_shared_paths_misc_info_size(); |
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|
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static void* get_shared_paths_misc_info(); |
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|
428 |
static bool check_shared_paths_misc_info(void* info, int size); |
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|
429 |
static void exit_with_path_failure(const char* error, const char* message); |
36508 | 430 |
|
431 |
static s2 module_to_classloader(const char* module_name); |
|
432 |
static void initialize_module_loader_map(JImageFile* jimage); |
|
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|
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static s2 classloader_type(Symbol* class_name, ClassPathEntry* e, |
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|
434 |
int classpath_index, TRAPS); |
41281 | 435 |
static bool is_in_patch_module(const char* const file_name); |
436 |
static void setup_patch_mod_path(); // Only when -Xshare:dump |
|
437 |
static int num_patch_mod_prefixes() { return _num_patch_mod_prefixes; } |
|
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438 |
#endif |
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|
439 |
|
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static void trace_class_path(const char* msg, const char* name = NULL); |
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|
441 |
|
1 | 442 |
// VM monitoring and management support |
443 |
static jlong classloader_time_ms(); |
|
444 |
static jlong class_method_total_size(); |
|
445 |
static jlong class_init_count(); |
|
446 |
static jlong class_init_time_ms(); |
|
447 |
static jlong class_verify_time_ms(); |
|
448 |
static jlong class_link_count(); |
|
449 |
static jlong class_link_time_ms(); |
|
450 |
||
36508 | 451 |
static void set_first_append_entry(ClassPathEntry* entry); |
452 |
||
1 | 453 |
// indicates if class path already contains a entry (exact match by name) |
454 |
static bool contains_entry(ClassPathEntry* entry); |
|
455 |
||
456 |
// adds a class path list |
|
457 |
static void add_to_list(ClassPathEntry* new_entry); |
|
458 |
||
459 |
// creates a class path zip entry (returns NULL if JAR file cannot be opened) |
|
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|
460 |
static ClassPathZipEntry* create_class_path_zip_entry(const char *apath, bool is_boot_append); |
1 | 461 |
|
36508 | 462 |
// add a path to class path list |
463 |
static void add_to_list(const char* apath); |
|
464 |
||
465 |
static bool string_ends_with(const char* str, const char* str_to_find); |
|
466 |
||
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467 |
// obtain package name from a fully qualified class name |
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// *bad_class_name is set to true if there's a problem with parsing class_name, to |
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469 |
// distinguish from a class_name with no package name, as both cases have a NULL return value |
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|
470 |
static const char* package_from_name(const char* const class_name, bool* bad_class_name = NULL); |
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471 |
|
36508 | 472 |
static bool is_jrt(const char* name) { return string_ends_with(name, MODULES_IMAGE_NAME); } |
473 |
||
1 | 474 |
// Debugging |
475 |
static void verify() PRODUCT_RETURN; |
|
476 |
||
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// Force compilation of all methods in all classes in bootstrap class path (stress test) |
|
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#ifndef PRODUCT |
|
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protected: |
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static int _compile_the_world_class_counter; |
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static int _compile_the_world_method_counter; |
1 | 482 |
public: |
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static void compile_the_world(); |
|
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static void compile_the_world_in(char* name, Handle loader, TRAPS); |
|
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static int compile_the_world_counter() { return _compile_the_world_class_counter; } |
1 | 486 |
#endif //PRODUCT |
487 |
}; |
|
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488 |
|
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// PerfClassTraceTime is used to measure time for class loading related events. |
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// This class tracks cumulative time and exclusive time for specific event types. |
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// During the execution of one event, other event types (e.g. class loading and |
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// resolution) as well as recursive calls of the same event type could happen. |
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// Only one elapsed timer (cumulative) and one thread-local self timer (exclusive) |
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// (i.e. only one event type) are active at a time even multiple PerfClassTraceTime |
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// instances have been created as multiple events are happening. |
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class PerfClassTraceTime { |
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public: |
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enum { |
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CLASS_LOAD = 0, |
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PARSE_CLASS = 1, |
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CLASS_LINK = 2, |
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502 |
CLASS_VERIFY = 3, |
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503 |
CLASS_CLINIT = 4, |
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|
504 |
DEFINE_CLASS = 5, |
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|
505 |
EVENT_TYPE_COUNT = 6 |
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|
506 |
}; |
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|
507 |
protected: |
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|
508 |
// _t tracks time from initialization to destruction of this timer instance |
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|
509 |
// including time for all other event types, and recursive calls of this type. |
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510 |
// When a timer is called recursively, the elapsedTimer _t would not be used. |
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511 |
elapsedTimer _t; |
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|
512 |
PerfLongCounter* _timep; |
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|
513 |
PerfLongCounter* _selftimep; |
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|
514 |
PerfLongCounter* _eventp; |
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|
515 |
// pointer to thread-local recursion counter and timer array |
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|
516 |
// The thread_local timers track cumulative time for specific event types |
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|
517 |
// exclusive of time for other event types, but including recursive calls |
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|
518 |
// of the same type. |
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|
519 |
int* _recursion_counters; |
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|
520 |
elapsedTimer* _timers; |
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|
521 |
int _event_type; |
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|
522 |
int _prev_active_event; |
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|
523 |
|
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|
524 |
public: |
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|
525 |
|
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|
526 |
inline PerfClassTraceTime(PerfLongCounter* timep, /* counter incremented with inclusive time */ |
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|
527 |
PerfLongCounter* selftimep, /* counter incremented with exclusive time */ |
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|
528 |
PerfLongCounter* eventp, /* event counter */ |
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|
529 |
int* recursion_counters, /* thread-local recursion counter array */ |
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|
530 |
elapsedTimer* timers, /* thread-local timer array */ |
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|
531 |
int type /* event type */ ) : |
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|
532 |
_timep(timep), _selftimep(selftimep), _eventp(eventp), _recursion_counters(recursion_counters), _timers(timers), _event_type(type) { |
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|
533 |
initialize(); |
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|
534 |
} |
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|
535 |
|
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|
536 |
inline PerfClassTraceTime(PerfLongCounter* timep, /* counter incremented with inclusive time */ |
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|
537 |
elapsedTimer* timers, /* thread-local timer array */ |
135031ddb2bb
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|
538 |
int type /* event type */ ) : |
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|
539 |
_timep(timep), _selftimep(NULL), _eventp(NULL), _recursion_counters(NULL), _timers(timers), _event_type(type) { |
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6966589: hs16-b08 causes java.lang.StackOverflowError
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|
540 |
initialize(); |
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|
541 |
} |
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|
542 |
|
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|
543 |
inline void suspend() { _t.stop(); _timers[_event_type].stop(); } |
135031ddb2bb
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|
544 |
inline void resume() { _t.start(); _timers[_event_type].start(); } |
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|
545 |
|
7910
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|
546 |
~PerfClassTraceTime(); |
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|
547 |
void initialize(); |
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|
548 |
}; |
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|
549 |
|
7397 | 550 |
#endif // SHARE_VM_CLASSFILE_CLASSLOADER_HPP |