1 8 java virtual machine

Java Virtual Machine-Linux general technology-Linux programming and kernel information. The following is a detailed description. 1. What is a Java Virtual Machine? A

[TOC]OverviewThe virtual machine loads the data of the description class from the class file into the memory, verifies the data, parses and initializes it, and finally forms the Java type that can be used directly by the virtual machine, which is the class loading mechanism

Java Virtual machine in the process of executing a Java program, it manages the memory divided into a number of different data regions, some regions with the virtual machine process started, and some areas are dependent on the use

in memory management, Java differs from C and C + + in that Java has dynamic memory allocation and garbage collection technology, but usually we seldom pay attention to the memory structure of the JVM and the GC, in the event of a memory leak or overflow problem, the troubleshooting work will become extremely difficult. 1. Run-time data region

Part III Virtual machine execution subsystemChapter 6th class file StructureThe basis of language independence is still the virtual machine and bytecode storage format, using the Java compiler can compile Java code into a storage

void Sspin () { short i; for (i = 0; i ) { // }}Method void Sspin ()0 Iconst_0 int constant value 0 in-stack1 Istore_1 The value of the stack-top int into the specified local variable2 Goto 105 iload_1 the specified int type local variable into the stack6 Iconst_1 int constant value 1 in-stack7 Iadd stack top two int values are added, and the result is in the stack8 I2S Stack Top int value strong to short value, and result in stack9 Istore_

Virtual machine as compact as possible, and also to facilitate the implementation of Java virtual machines on platforms that have very few common registers. In addition, this stack-based architecture of Java virtual machines also

virtual machines on platforms that have very few common registers. In addition, this stack-based architecture of Java virtual machines also facilitates the code optimization of dynamic compilers and instant compilers that are implemented by some virtual machines at runtime.Depicts the memory area created by the

1 The life cycle of a Java virtual machineThe bounden duty of a runtime Java Virtual machine instance is to be responsible for running a Java program. When a

Deep understanding of Java Virtual Machine notes-class loading process, deep understanding of virtual machinesI. LoadingThe Loading stage is a stage of the Class Loading process. In the loading phase, the virtual machine must comp

Java Virtual machine-virtual machine byte code execution engineAll Java Virtual machine execution engines are consistent: the input is a byt