https://github.com/bostrt/jvm-loop-unswitching-bug-simplified

Reproducer for https://bugs.java.com/view_bug.do?bug_id=8021898 and https://issues.apache.org/jira/browse/HTTPCLIENT-1173
https://github.com/bostrt/jvm-loop-unswitching-bug-simplified

Last synced: 19 days ago
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Reproducer for https://bugs.java.com/view_bug.do?bug_id=8021898 and https://issues.apache.org/jira/browse/HTTPCLIENT-1173

• Host: GitHub
• URL: https://github.com/bostrt/jvm-loop-unswitching-bug-simplified
• Owner: bostrt
• Created: 2018-03-09T02:05:16.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2018-03-09T02:12:07.000Z (almost 7 years ago)
• Last Synced: 2024-11-01T10:08:37.755Z (2 months ago)
• Language: Java
• Homepage:
• Size: 813 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
## What is this?

All credit for this particular reproducer goes to [rholder](https://github.com/rholder). This repository just contains a stupid simple version of his reproducer that only needs `java` and `javac`.

## How to use

If you are *trying* to reproduce the issue then make sure you have an old Java version. Below, you can see I'm using 1.7.0_55 which is older than the verion where the bug was fixed (in 1.7.0_60+ or 1.8+).

```

# java -version

java version "1.7.0_55"

OpenJDK Runtime Environment (rhel-2.4.7.2.el7_0-x86_64 u55-b13)

OpenJDK 64-Bit Server VM (build 24.51-b03, mixed mode)

# javac -cp ./httpclient-4.2.2.jar:./commons-lang-2.6.jar:./httpcore-4.2.2.jar JvmBug.java

# java -cp .:./httpclient-4.2.2.jar:./commons-lang-2.6.jar:./httpcore-4.2.2.jar JvmBug

```

Eventually, the second command that runs the reproducer should result in someting like:

```

# A fatal error has been detected by the Java Runtime Environment:

#

#  SIGSEGV (0xb) at pc=0x00007fc3f90751a1, pid=75921, tid=140479307597568

#

# JRE version: OpenJDK Runtime Environment (7.0_55-b13) (build 1.7.0_55-mockbuild_2014_05_30_13_47-b00)

# Java VM: OpenJDK 64-Bit Server VM (24.51-b03 mixed mode linux-amd64 compressed oops)

# Problematic frame:

# J  org.apache.http.impl.cookie.BestMatchSpec.formatCookies(Ljava/util/List;)Ljava/util/List;

#

# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again

#

# An error report file with more information is saved as:

```