STACK_GETBOUNDS(3C) Standard C Library Functions STACK_GETBOUNDS(3C)

NAME

stack_getbounds - retrieve stack boundaries

SYNOPSIS

#include <ucontext.h>

int stack_getbounds(stack_t *sp);

DESCRIPTION

The stack_getbounds() function retrieves the stack boundaries that the
calling thread is currently operating on. If the thread is currently
operating on the alternate signal stack, this function will retrieve the
bounds of that stack.


If successful, stack_getbounds() sets the ss_sp member of the stack_t
structure pointed to by sp to the base of the stack region and the
ss_size member to its size (maximum extent) in bytes. The ss_flags member
is set to SS_ONSTACK if the calling thread is executing on its alternate
signal stack, and zero otherwise.

RETURN VALUES

Upon successful completion, stack_getbounds() returns 0. Otherwise, -1 is
returned and errno is set to indicate the error.

ERRORS

The stack_getbounds() function will fail if:

EFAULT
The sp argument does not refer to a valid address.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Evolving |
+--------------------+-------------------+
|MT-Level | Async-Signal-Safe |
+--------------------+-------------------+

SEE ALSO

getustack(2), sigaction(2), sigaltstack(2), stack_setbounds(3C),
attributes(7)

July 18, 2002 STACK_GETBOUNDS(3C)