THR_STKSEGMENT(3C)THR_STKSEGMENT(3C)NAMEthr_stksegment - get thread stack address and size
SYNOPSIS
cc -mt [ flag... ] file...[ library... ]
#include <thread.h>
#include <signal.h>
int thr_stksegment(stack_t *ss);
DESCRIPTION
The thr_stksegment() function returns, in its stack_t argument, the
address and size of the calling thread's stack.
The stack_t structure includes the following members:
void *ss_sp
size_t ss_size
int ss_flags
On successful return from thr_stksegment(), ss_sp contains the high
address of the caller's stack and ss_size contains the size of the
stack in bytes. The ss_flags member is always 0. Note that the meaning
of ss_sp is reversed from other uses of stack_t such as sigaltstack(2)
where ss_sp is the low address.
The stack information provided by thr_stksegment() is typically used by
debuggers, garbage collectors, and similar applications. Most applica‐
tions should not require such information.
RETURN VALUES
The thr_stksegment() function returns 0 if the thread stack address
and size were successfully retrieved. Otherwise, it returns a non-zero
error value.
ERRORS
The thr_stksegment() function will fail if:
EAGAIN
The stack information for the thread is not available
because the thread's initialization is not yet complete, or
the thread is an internal thread.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌───────────────┬─────────────────┐
│ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├───────────────┼─────────────────┤
│MT-Level │ MT-Safe │
└───────────────┴─────────────────┘
SEE ALSOsigaltstack(2), thr_create(3C), attributes(5)
Jun 15, 2000 THR_STKSEGMENT(3C)
