Programming :: Memory Corruption While Parsing In Multithread Program?

language: C
OS: linux

I wrote a multithread program(approx 1000 thread have to run) and each thread has to parse a file(for each thread there is one file, ex:thread1 has to parse file1 and thread2 has to parse file2 like this....). I wrote "parse" program as follows. It is working well, if i create 50 threads. but if i run more than 200 thraeds Im getting doublefree corruption as follows:

Code:

*** glibc detected *** ./simulator: double free or corruption (fasttop): 0xb70007b0 ***

And some time I am getting parsing problem and error af follows:

Code:

powersetting.6607:1: parser error : Start tag expected, '<' not found (where powersetting.6607 is file name, when i check this file it is started with '<').

parse program as follows:

Code:

void parse_first(char* filename, int portnum, struct Poweroff *Powerptr1)
{
struct Poweroff *Powerptr;
Powerptr = Powerptr1;

[code]....