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xilkernel and threads

Hi,

Can anybody shed some light onto a problem that I am having getting the xilkernel to behave! Essentially, I compile my simple program and the kernel keeps creating new instances of itself at run time. The prog_main() is set up as a static thread instance PARAMETER static_pthread_table = ((prog_main,1)) in the MSS file. See the ouput below (with verbose debug to true)

source

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#include "xmk.h"

#include

void *prog_main(void *arg);

int main () { xilkernel_main (); }

void *prog_main(void *arg) { static Index = 0; printf("prog_main(%d) called\n\r", Index++);

while(1) { printf("In main - Data%d Index:%d\n\r", Data++, Index); sleep(500); } }

output

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In main - Data18 Index:6

In main - Data19 Index:6 Idle Task XMK: Start XMK: Initializing Hardware... XMK: Initializing interrupt controller XMK: Connecting timer interrupt XMK: Starting the interrupt controller XMK: Initializing PIT device. XMK: System initialization... XMK: Enabling interrupts and starting system...

prog_main(6) called

In main - Data20 Index:7 Idle Task XMK: Start XMK: Initializing Hardware... XMK: Initializing interrupt controller XMK: Connecting timer interrupt XMK: Starting the interrupt controller XMK: Initializing PIT device. XMK: System initialization... XMK: Enabling interrupts and starting system...

prog_main(7) called

In main - Data21 Index:8 Idle Task

In main - Data22 Index:8

In main - Data23 Index:8

In main - Data24 Index:8

In main - Data25 Index: In main - Data1099 Index:407

In main - Data1100 Index:407 XMK: Start XMK: Initializing Hardware... XMK: Initializing interrupt controller XMK: Connecting timer interrupt XMK: Starting the interrupt controller XMK: Initializing PIT device. XMK: System initialization... XMK: Enabling interrupts and starting system...

prog_main(407) called

In main - Data1101 Index:408 Idle Task

In main - Data1102 Index:408 XMK: Start XMK: Initializing Hardware... XMK: Initializing interrupt controller XMK: Connecting timer interrupt XMK: Starting the interrupt controller XMK: Initializing PIT device. XMK: System initialization... XMK: Enabling interrupts and starting system...

prog_main(408) called

In main - Data1103 Index:409 Idle Task

etc!!!!

Reply to
Stef
Loading thread data ...

Hi,

You are using printf in your threads. printf requires a big stack. There is likely a stack overflow in the thread. You should increase the stack size allocated for threads, or allocate a custom large while creating the thread with pthread_create.

Since there is no memory protection, these kind of errors can usually bring the kernel (and any standalone program for that matter) down to its knees.

thanks, Vasanth

Stef wrote:

Reply to
Vasanth Asokan

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