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Asked: 2026-06-02T06:12:21+00:00

My java code calls via JNI some C++ code from a shared library (eg

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My java code calls via JNI some C++ code from a shared library (eg libtest.so). The code is instrumented with some special debugging symbols that exist it libdebug.so. When I call

LD_PRELOAD=/usr/lib/libdebug.so java com.test.myMain

the execution stops with Exception in thread "main" java.lang.UnsatisfiedLinkError

because symbols from libdebug.so are not loaded (why?).

I was wondering if it is possible to modify my code in order to PRELOAD the library inside my java code. (Of course I don’t want to compile java with libdebug.so…)

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1 Answer

  1. Editorial Team

    System.load can be used to load any shared library, so you might try loading the debug library in a static block using System.load (before you load your JNI lib).
    Or try System.loadLibary("debug") before your JNI lib.

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