Review Request : JDK-8213362 : Could not find libjava.dylib error when initializing JVM via JNI_CreateJavaVM (original) (raw)

Priyanka Mangal priyanka.mangal at oracle.com
Tue Nov 6 04:35:49 UTC 2018

The Eclipse launcher is capable of loading the Java VM in the eclipse process using the Java Native Interface Invocation API.  The launcher is still capable of starting the Java VM in a separate process the same as previous version of Eclipse did.  Which method is used depends on how the VM was found.

    No -vm specified

When no -vm is specified, the launcher looks for a virtual machine first in a jre directory in the root of eclipse and then on the search path. If java is found in either location, then the launcher looks for a jvm shared library (jvm.dll on Windows, libjvm.so on *nix platforms) relative to that java executable.

Eclipse can be started with "-vm " to indicate a virtual machine to use. There are several possibilities for the value of :

  1. directory:  is a directory. We look in that directory for: (1) a java launcher or (2) the jvm shared library. If we find the jvm shared library, we use JNI invocation. If we find a launcher, we attempt to find a jvm library in known locations relative to the launcher. If we find one, we use JNI invocation. If no jvm library is found, we exec java in a new process.
  2. java.exe/javaw.exe: is a path to a java launcher. We exec that java launcher to start the vm in a new process.
  3. jvm dll or so: is a path to a jvm shared library. We attempt to load that library and use the JNI Invocation API to start the vm in the current process.

Found from https://help.eclipse.org/luna/index.jsp?topic=%2Forg.eclipse.platform.doc.isv%2Freference%2Fmisc%2Flauncher.html Regards Priyanka On 11/5/2018 8:24 PM, Alan Bateman wrote:

On 05/11/2018 14:21, Magnus Ihse Bursie wrote: Hi,

Fix looks good, but maybe we should have a regression test of GetJREPath()? /Magnus The fix looks okay but I'm puzzled as to how Eclipse is running into this. Do they locate/call libjli/GetJREPath directly or is this happening then it is called indirectly? -Alan

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