_STACK_GROW(3C) Standard C Library Functions _STACK_GROW(3C)
NAME
_stack_grow - express an intention to extend the stack
SYNOPSIS
#include <ucontext.h>
void *_stack_grow(
void *addr);
DESCRIPTION
The
_stack_grow() function indicates to the system that the stack is
about to be extended to the address specified by
addr. If extending
the stack to this address would violate the stack boundaries as
retrieved by
stack_getbounds(3C), a
SIGSEGV is raised.
If the disposition of
SIGSEGV is
SIG_DFL, the process is terminated
and a core dump is generated. If the application has installed its
own
SIGSEGV handler to run on the alternate signal stack, the signal
information passed to the handler will be such that a call to
stack_violation(3C) with these parameters returns 1.
The
addr argument is a biased stack pointer value. See the Solaris
64-bit Developer's Guide.
This function has no effect if the specified address,
addr, is within
the bounds of the current stack.
RETURN VALUES
If the
_stack_grow() function succeeds and does not detect a stack
violation, it returns
addr.
ERRORS
No errors are defined.
USAGE
The
_stack_grow() function does not actually adjust the stack pointer
register. The caller is responsible for manipulating the stack
pointer register once
_stack_grow() returns.
The
_stack_grow() function is typically invoked by code created by
the compilation environment prior to executing code that modifies the
stack pointer. It can also be used by hand-written assembly routines
to allocate stack-based storage safely.
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Evolving |
+--------------------+-------------------+
|MT-Level | Async-Signal-Safe |
+--------------------+-------------------+
SEE ALSO
stack_getbounds(3C),
stack_inbounds(3C),
stack_violation(3C),
attributes(7) Solaris 64-bit Developer's Guide
February 17, 2023 _
STACK_GROW(3C)
