hsdis | hotspot disassembler hsdis

by liuzhengyang Shell Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(5)Vulnerabilities Install Support

kandi X-RAY | hsdis Summary

hsdis is a Shell library typically used in Hardware applications. hsdis has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Hotspot disassembler extracted from openjdk.

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Quality

Security

License

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Support

hsdis has a low active ecosystem.

It has 132 star(s) with 51 fork(s). There are 5 watchers for this library.

It had no major release in the last 6 months.

There are 3 open issues and 0 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of hsdis is current.

Quality

hsdis has no bugs reported.

Security

hsdis has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

hsdis does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

hsdis releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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hsdis Key Features

No Key Features are available at this moment for hsdis.

hsdis Examples and Code Snippets

No Code Snippets are available at this moment for hsdis.

Community Discussions

Trending Discussions on hsdis

MATLAB function from Java causes Runtime Error (EXCEPTION_ACCESS_VIOLATION)

In Java , what operations are involved in the final field assignment in the constructor?

Why does Java compile to assembly twice?

Unable to use HSDIS with OpenJDK 11

Java JNI Launcher in C++: Works without JavaFX, Core Dump with JavaFX

QUESTION

MATLAB function from Java causes Runtime Error (EXCEPTION_ACCESS_VIOLATION)

Asked 2019-Dec-09 at 20:12

I'm using MATLAB Engine API for Java, so far basics such as eval and feval functions work without a problem. I even drew an histogram with those. But PutVariable method causes me to have "EXCEPTION_ACCESS_VIOLATION".

Code is:

...

ANSWER

Answered 2019-Dec-09 at 20:12

You're doing it right. This is a bug in Matlab, the JDK, or both. Not much you can do here. Contact support for MathWorks and your JDK vendor and let them know what happened, and talk to your IT department to see if you have a weird machine configuration that might be messing them up.

And try running against a different JDK, like a much lower major version such as JDK 8. Matlab uses old JDK versions, so it's more likely to be tested and work against them.

Source https://stackoverflow.com/questions/59238471

QUESTION

In Java , what operations are involved in the final field assignment in the constructor?

Asked 2019-Aug-11 at 13:10

I got different execution result from the follow code if the Simple class field a was modified by final keyword.

If the a is a final field , this program will normally exit; If it's a plain field, this program will keep running all the time.

This situation only occurs in C2 compiler .

I thought this situation is related to visibility of the flag field in multi-threads environment.However, I try to observed the assembly code by hsdis ,and found the difference between with and without final keyword.

I found nothing difference.

Actually, I know the storing "final" field would not emit any assembly instructions on x86 platform. But why this situation came out? Are there some particular operations I don't know ?

Thanks for reading.

...

ANSWER

Answered 2019-Aug-11 at 13:10

You've disassembled the wrong compilation. I mean, there is a standalone compiled runMethod on both screenshots, however, it is never executed in reality. Instead, execution jumps from the interpreter to the OSR stub. You need to look for a compilation marked with % sign (which denotes on-stack replacement).

Source https://stackoverflow.com/questions/57427531

QUESTION

Why does Java compile to assembly twice?

Asked 2019-Jun-01 at 19:16

I compiled a simple Java file to assembly using Java 8 on Mac OS X. This is Test.java:

...

ANSWER

Answered 2019-Jun-01 at 19:16

Why does the generated assembly code have two main methods?

The Assembly contains the result of the work of the C1 compiler at different compilation levels:

Source https://stackoverflow.com/questions/56404146

QUESTION

Unable to use HSDIS with OpenJDK 11

Asked 2019-May-13 at 09:14

So I am trying to build/use hsdis with openJDK-11. if I try to build it with binutils I get the following errors:

...

ANSWER

Answered 2019-May-13 at 09:14

I have tried building it with binutils 2.29, 2.30, 2.31 and 2.32. Got same error with all of them.

The version of the source you have does not work with binutils 2.29+. jdk/jdk has a patch to rectify this. See: https://bugs.openjdk.java.net/browse/JDK-8191006 Which suggests the following fix to hsdis.c:

Source https://stackoverflow.com/questions/56101856

QUESTION

Java JNI Launcher in C++: Works without JavaFX, Core Dump with JavaFX

Asked 2018-Dec-01 at 12:46

I have written a C++ JNI Java Launcher. It works if I launch a java program that doesn't use JavaFX, but it creates a core dump if I try to launch a JavaFX program with it. Here's the code:

Without JavaFX - launch.cpp

With JavaFX - launch.ccp

The core dump only occurs if I use my native launcher. If I run the JavaFX program with the same arguments using java at the command line, there's no problem. It runs as expected.

Here's the content of the hs_err file, in a pastebin.

Rather than paste in code from a handful of files, I created a repository with two branches with complete runnable examples.

Full Example - No JavaFX

Full Example - With JavaFX

You can run the examples by editing build.sh and run-native.sh and changing the line jdk="/usr/lib/jvm/java-11-oracle" to be accurate for your system. Then:

...

ANSWER

Answered 2018-Dec-01 at 12:46

I figured it out. The issue is in on line 35 with the arguments that are passed the JVM's main method:

env->CallStaticVoidMethod( cls, main, " ");

We are passing a c-string to Java where java expect a java.lang.String[]. Once anyone tries to read that argument, the JVM crashes. JavaFX must be reading the arguments at some point between main and start(), and crashing as a result.

The correct line is either

env->CallStaticVoidMethod( cls, main, "(I)V"); (I haven't tested this one, but it's the common line from the example code provided by the java folks)

or:

Source https://stackoverflow.com/questions/53553542

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install hsdis

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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