Hi, I checked the symbol table: nm /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Libraries/libclient.dylib | grep JNI_CreateJavaVM_Impl 00006ee9 T _JNI_CreateJavaVM_Impl so it seems that the exported symbol is _JNI_CreateJavaVM_Impl Luc #Luc 2013/9/15 Joachim Geidel <joachim.geidel@onlinehome.de>

I am trying to change JNIPort such that it uses NativeBoost instead of Alien. The first problem I ran into is that I can't load a function from the Java VM library libclient.dylib on OS X 10.8.5 in Pharo 2.0. I am using the 1.6.0 JDK from Apple, and libclient.dylib is an i386 (i.e. 32 bit) library. The following expression answers nil:

NativeBoost loadFunction: 'JNI_CreateJavaVM_Impl' from:

'/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Libraries/libclient.dylib'

The same happens when I copy libclient.dylib to the working directory and do not specify a path. The only way to produce a different behavior is copying the library into the Pharo2.0.app bundle and put it in the directory Pharo2.0.app/Contents/MacOS/Plugins. Then, executing

NativeBoost loadFunction: 'JNI_CreateJavaVM_Impl' from: 'libclient.dylib'

crashes Pharo when attempting to load the library:

Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Exception Type: EXC_BAD_ACCESS (SIGABRT) Exception Codes: EXC_I386_GPFLT

Application Specific Information: dyld: in dlopen() abort() called

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x03f34a6a __pthread_kill + 10 1 libsystem_c.dylib 0x03df0b2f pthread_kill + 101 2 libsystem_c.dylib 0x03e27631 abort + 168 3 org.pharo.Pharo 0x0019f04a error + 138 4 ??? 0xffffffff 0 + 4294967295 5 libdyld.dylib 0x03da5be9 getPerThreadBufferFor_dlerror(unsigned int) + 108 6 dyld 0x8fe87076 dlerrorSet(char const*) + 47 7 dyld 0x8fe8454c dlopen + 533 8 libdyld.dylib 0x03da5dbe dlopen + 68 9 org.pharo.Pharo 0x001a1d65 tryLoadingInternals + 293

Any ideas what is wrong?

Joachim Geidel

-- View this message in context: http://forum.world.st/NativeBoost-Can-t-load-function-on-OS-X-10-8-5-tp47083... Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.

Joachim Geidel wrote

The following expression answers nil:

NativeBoost loadFunction: 'JNI_CreateJavaVM_Impl' from: '/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Libraries/libclient.dylib'

My fault! I should have used NativeBoost class>>loadSymbol:fromModule:. The two methods have no comment, and it took a while until I found the comment in Object>>nbGetSymbolAddress:module: which explains that #loadSymbol:fromModule: uses the OS specific symbol lookup, while loadFunction:from: searches for functions of VM plugins. Best regards, Joachim Geidel -- View this message in context: http://forum.world.st/NativeBoost-Can-t-load-function-on-OS-X-10-8-5-tp47083... Sent from the Pharo Smalltalk Developers mailing list archive at Nabble.com.