Craig, Are you using the RCX code or the NXT code?
Lawrie ----- Original Message ----- From: "Fleming, Craig" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, June 25, 2007 11:48 PM Subject: [Lejos-discussion] Compiling Lejos for the Nintendo DS > Hello everyone, > > I know that a similar topic was brought up many years ago, and I don't > know if that was anything other than one developers little pet project, > or even if anyone who reads this is interested in this. But I had some > free time and a desire to see if I could do it, so here it is. If there > is no interest, that's quite alright - I'll just keep plugging away here > :). I've run into a confusing problem and I had hoped someone in here > might be able to help me out. Unfortunately C/C++ is not my native > language - I know how to write some small programs but most of the Lejos > code is beyond me. > > I've managed to write/copy enough code to get Lejos to compile using > DevKitPro/DevKitArm. I've been through a couple days of debugging, > making steady progress until today. I'm in threads.c, in init_threads( > Thread *thread ). What happens is: > > 1. A successful call is made to new_primitive_array, assigning to > thread->stackFrameArray. > 2. A successful call is made to new_primitive_array, assigning to > thread->stackArray > 3. An assertion exception 20 is thrown. > > I've been printfing my way around the code, and I've determined that > thread->stackFrameArray is somehow corrupted between the second call to > new_primitive_array and the first line of this call. There is no code > except the two printfs between the point of corruption. I fixed this > problem by assigning to a temporary variable and then after the second > call to new_primitive_array, I assign that temporary variable to > thread->stackFrameArray. > > Still with me? :) This work-around keeps the pointers from being > corrupted, but doesn't solve the problem! If I do this, a call to > is_array still returns false, throwing the assertion 20. A few more > printfs give me the reason I'm writing this - a strange situation that > is beyond my knowledge. > > 1. A call to is_array just after the assignment to thread->stackArray > returns 1. > 2. A call to is_array just after THAT call to is_array returns 0! > > Here is the offending section of code, including the "work-around" > (which is a problem I don't understand by itself), and the final two > printfs. The first displays "1 1", the second displays "0 0". > > JINT stackFrameArray = ptr2word (new_primitive_array (T_STACKFRAME, > INITIAL_STACK_FRAMES)); > if (stackFrameArray == JNULL) > return false; > > // Allocate actual stack storage (INITIAL_STACK_SIZE * 4 bytes) > thread->stackArray = ptr2word (new_primitive_array (T_INT, > INITIAL_STACK_SIZE)); > thread->stackFrameArray = stackFrameArray; > printf( "%d %d\n", is_array( word2obj(thread->stackFrameArray) ), > is_array( word2obj(thread->stackArray) ) ); > printf( "%d %d\n", is_array( word2obj(thread->stackFrameArray) ), > is_array( word2obj(thread->stackArray) ) ); > if (thread->stackArray == JNULL) > { > free_array (ref2obj(thread->stackFrameArray)); > thread->stackFrameArray = JNULL; > return false; > } > > gThreadCounter++; > > #ifdef VERIFY > assert (is_array (word2obj (thread->stackFrameArray)), THREADS0); > assert (is_array (word2obj (thread->stackArray)), THREADS1); > #endif > > Thanks for reading. > > Craig > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Lejos-discussion mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/lejos-discussion > > > -- > Internal Virus Database is out-of-date. > Checked by AVG Free Edition. > Version: 7.5.472 / Virus Database: 269.8.0/818 - Release Date: 25/05/2007 > 12:32 > > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Lejos-discussion mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/lejos-discussion
