Re: [ST-users] Help applying print_stk patch

[Yang Z. <yan...@gm...>]

Yang Zhang wrote:
> Mike Abbott wrote:
>>> $ CPATH=/tmp/st-1.8/LINUX_2.6.27-7-generic_DBG/ 
>>> LIBRARY_PATH=/tmp/st-1.8/LINUX_2.6.27-7-generic_DBG/ gcc stbt.c -lst
>>> /tmp/ccoL3i05.o: In function `h':
>>> stbt.c:(.text+0x2e): undefined reference to `_st_print_thread_stacks'
>>> collect2: ld returned 1 exit status
>>
>> I get exactly the same error when I use the wrong path
>> (the wrong LINUX_whatever_DBG), but when I use the right path the gcc
>> command works.  Then when I run
>> "LD_LIBRARY_PATH=/tmp/st-1.8/LINUX_whatever_DBG ./a.out" it runs fine.
>>
>>
>>
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> 
> Whoops.  Turned out I had two libst.a's on my system, and the other one 
> was getting in the way.

Now I can build and run the program:

#define DEBUG
#include <st.h>
void h(int s) {
   _st_print_thread_stacks(0);
}
void *f(void *p) {
   st_sleep(1);
   h(0);
   return NULL;
}
int main() {
   st_init();
   st_thread_t ts[3];
   int i;
   for (i = 0; i < 3; i++)
     ts[i] = st_thread_create(&f, NULL, 1, 0);
   // h(0); // I get a seg fault here if I uncomment this.
   for (i = 0; i < 3; i++)
     st_thread_join(ts[i], NULL);
   return 0;
}

but it prints out nothing (except for a correct thread count):

5 thread(s) with this backtrace:


5 thread(s) with this backtrace:


5 thread(s) with this backtrace:


-- 
Yang Zhang
http://www.mit.edu/~y_z/