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16 messages in net.java.dev.jna.usersRe: [jna-users] Crash JVM call functi...| From | Sent On | Attachments |
|---|---|---|
| Sylvain ZUNINO [GMAIL] | May 18, 2009 6:40 am | |
| Timothy Wall | May 18, 2009 7:00 am | |
| Sylvain ZUNINO [GMAIL] | May 18, 2009 7:46 am | |
| Sylvain ZUNINO [GMAIL] | May 18, 2009 9:56 am | |
| Timothy Wall | May 18, 2009 10:04 am | |
| Sylvain ZUNINO [GMAIL] | May 18, 2009 10:14 am | |
| Timothy Wall | May 18, 2009 11:00 am | |
| Sylvain ZUNINO [GMAIL] | May 18, 2009 11:43 am | |
| Sylvain ZUNINO [GMAIL] | May 18, 2009 11:50 am | |
| Timothy Wall | May 18, 2009 12:02 pm | |
| Sylvain ZUNINO [GMAIL] | May 18, 2009 12:34 pm | |
| Timothy Wall | May 18, 2009 12:37 pm | |
| Sylvain ZUNINO [GMAIL] | May 19, 2009 12:33 am | |
| Timothy Wall | May 19, 2009 1:27 am | |
| Sylvain ZUNINO [GMAIL] | May 19, 2009 1:35 am | |
| Timothy Wall | May 19, 2009 2:18 am |
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| Subject: | Re: [jna-users] Crash JVM call function many times | Actions... |
|---|---|---|
| From: | Sylvain ZUNINO [GMAIL] (sylv...@gmail.com) | |
| Date: | May 18, 2009 7:46:20 am | |
| List: | net.java.dev.jna.users | |
Sorry,
But I'm a beginner and I forget to tell you that It works on Windows architecture 32 bits but doesn't work on linux amd64 kernel. I tried to change my CFunction like that : void cfunction(String param1, String parm2, String[]param3, int nbOfParams3, byte[] out_param);
But I've the same problem... Concerning the memory ... I'm sorry but I dont know answer your question ...
Regards,
Le 18 mai 09 à 16:01, Timothy Wall a écrit :
Where and how is the memory behind the returned char* allocated?
The memory behind each of the Java String parameters is only valid for the duration of the native call.
On May 18, 2009, at 9:40 AM, Sylvain ZUNINO [GMAIL] wrote:
Hello,
I implemente JNA to call a C function which return a char *.
public interface MYCFunction extends Library { MYCFunction INSTANCE = (MYFunction)Native.loadLibray (JNA_LIB_PATH, MYCFunction.class); String cfunction(String param1, String parm2, String[]param3, int nbOfParams3); }
I call more than 10000 times this function in a program :
for (int i=0; i<15000; i++) { String param1= "param1"; String param2= "param2"; String[] param3= { "param3_1", "param3_2" }; String res = MYCFunction.INSTANCE.cfunction(param1, param2, param3, param3.length);
........ }
My C program work well when I try It with a main (15000 times no problems). But when I test with JNA I'have a JVM crash at the 9998 or 10003 iterations.
What I'm wrong ???
Regards, Sylvain