thread stack pointer

Question

In Linux 2.6.32-32, is there a way to find the following information about a thread programmatically in a pthreads program? I need: run count, stack pointer, stack start/end, stack size, stack usage. Something like ThreadX, I guess, but within a program. Thanks.

Answer 1

• pthread_getattr_np() should give you the pthread attributes of a thread
• pthread_attr_getstack() returns the stack address and size
• I don't know what you mean by run count.
• For the stack pointer of a thread different than your current one you might need to use ptrace. Once you have it, you can use it to do the maths for determining how much of the stack is used.

For obtaining your own stack pointer you can always do something along the lines of:

mword sp;
asm volatile ("mov %esp, $0" : "=r"(sp));