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Contents

Title and Copyright Information

Preface

• Audience
• Documentation Accessibility
• Related Documents
• Conventions

1 Java Virtual Machine Technology Overview

2 Compiler Control

• Writing Directives
  • List of Compiler Control Options
  • Writing a Directives File
  • Writing a Compiler Directive
  • Writing a Method Pattern in a Compiler Directive
  • Writing an Inline Directive Option
  • Preventing Duplication with the Enable Option
• Understanding Directives Better
  • What Is the Default Directive?
  • How Are Directives Applied to Code?
  • Compiler Control and Backward Compatibility
• Commands to Work with Directive Files
  • Compiler Directives and the Command Line
  • Compiler Directives and Diagnostic Commands
    • Getting Your Java Process Identification Number
    • Adding Directives Through Diagnostic Commands
    • Removing Directives Through Diagnostic Commands
    • Printing Directives Through Diagnostic Commands
  • How Are Directives Ordered in the Directives Stack?

3 Garbage Collection

4 Class Data Sharing

• Overview of Class Data Sharing
• Regenerating the Shared Archive
• Manually Controlling Class Data Sharing

5 Java HotSpot Virtual Machine Performance Enhancements

• Compact Strings
• Tiered Compilation
• Compressed Ordinary Object Pointer
• Zero-Based Compressed Ordinary Object Pointers
• Escape Analysis

6 Support for Non-Java Languages

• Introduction to Non-Java Language Features
• Static and Dynamic Typing
  • Statically-Typed Languages Are Not Necessarily Strongly-Typed Languages
• The Challenge of Compiling Dynamically-Typed Languages
• The invokedynamic Instruction
  • Defining the Bootstrap Method
  • Specifying Constant Pool Entries
    • Example Constant Pool
  • Using the invokedynamic Instruction

7 Signal Chaining

8 Native Memory Tracking

• Key Features
• Using Native Memory Tracking
  • Enabling NMT
  • Accessing NMT Data using jcmd
• Obtaining NMT Data at VM Exit

9 DTrace Probes in HotSpot VM

• Using the hotspot Provider
  • VM Lifecycle Probes
  • Thread Lifecycle Probes
  • Classloading Probes
  • Garbage Collection Probes
  • Method Compilation Probes
  • Monitor Probes
  • Application Tracking Probes
• Using the hotspot_jni Provider
• Sample DTrace Probes

10 Fatal Error Reporting

• Error Report Example

11 Java Virtual Machine Related Resources

• Tools