mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-12-29 14:23:42 +01:00
122 lines
2.6 KiB
Groff
122 lines
2.6 KiB
Groff
'\" t
|
|
.\" Manual page created with latex2man on Thu Aug 5 10:20:31 CEST 2004
|
|
.\" NOTE: This file is generated, DO NOT EDIT.
|
|
.de Vb
|
|
.ft CW
|
|
.nf
|
|
..
|
|
.de Ve
|
|
.ft R
|
|
|
|
.fi
|
|
..
|
|
.TH "UNW\\_SET\\_CACHING\\_POLICY" "3" "05 August 2004" "Programming Library " "Programming Library "
|
|
.SH NAME
|
|
unw_set_caching_policy
|
|
\-\- set unwind caching policy
|
|
.PP
|
|
.SH SYNOPSIS
|
|
|
|
.PP
|
|
#include <libunwind.h>
|
|
.br
|
|
.PP
|
|
int
|
|
unw_set_caching_policy(unw_addr_space_t
|
|
as,
|
|
unw_caching_policy_t
|
|
policy);
|
|
.br
|
|
.PP
|
|
.SH DESCRIPTION
|
|
|
|
.PP
|
|
The unw_set_caching_policy()
|
|
routine sets the caching policy
|
|
of address space as
|
|
to the policy specified by argument
|
|
policy\&.
|
|
The policy
|
|
argument can take one of three
|
|
possible values:
|
|
.TP
|
|
UNW_CACHE_NONE
|
|
Turns off caching completely. This
|
|
also implicitly flushes the contents of all caches as if
|
|
unw_flush_cache()
|
|
had been called.
|
|
.TP
|
|
UNW_CACHE_GLOBAL
|
|
Enables caching using a global cache
|
|
that is shared by all threads. If global caching is unavailable or
|
|
unsupported, libunwind
|
|
may fall back on using a per\-thread
|
|
cache, as if UNW_CACHE_PER_THREAD
|
|
had been specified.
|
|
.TP
|
|
UNW_CACHE_PER_THREAD
|
|
Enables caching using
|
|
thread\-local caches. If a thread\-local caching are unavailable or
|
|
unsupported, libunwind
|
|
may fall back on using a global cache,
|
|
as if UNW_CACHE_GLOBAL
|
|
had been specified.
|
|
.PP
|
|
If caching is enabled, an application must be prepared to make
|
|
appropriate calls to unw_flush_cache()
|
|
whenever the target
|
|
changes in a way that could affect the validity of cached information.
|
|
For example, after unloading (removing) a shared library,
|
|
unw_flush_cache()
|
|
would have to be called (at least) for the
|
|
address\-range that was covered by the shared library.
|
|
.PP
|
|
For address spaces created via unw_create_addr_space(3),
|
|
caching is turned off by default. For the local address space
|
|
unw_local_addr_space,
|
|
caching is turned on by default.
|
|
.PP
|
|
.SH RETURN VALUE
|
|
|
|
.PP
|
|
On successful completion, unw_set_caching_policy()
|
|
returns 0.
|
|
Otherwise the negative value of one of the error\-codes below is
|
|
returned.
|
|
.PP
|
|
.SH THREAD AND SIGNAL SAFETY
|
|
|
|
.PP
|
|
unw_set_caching_policy()
|
|
is thread\-safe but \fInot\fP
|
|
safe
|
|
to use from a signal handler.
|
|
.PP
|
|
.SH ERRORS
|
|
|
|
.PP
|
|
.TP
|
|
UNW_ENOMEM
|
|
The desired caching policy could not be
|
|
established because the application is out of memory.
|
|
.PP
|
|
.SH SEE ALSO
|
|
|
|
.PP
|
|
libunwind(3),
|
|
unw_create_addr_space(3),
|
|
unw_flush_cache(3)
|
|
.PP
|
|
.SH AUTHOR
|
|
|
|
.PP
|
|
David Mosberger\-Tang
|
|
.br
|
|
Hewlett\-Packard Labs
|
|
.br
|
|
Palo\-Alto, CA 94304
|
|
.br
|
|
Email: \fBdavidm@hpl.hp.com\fP
|
|
.br
|
|
WWW: \fBhttp://www.hpl.hp.com/research/linux/libunwind/\fP\&.
|
|
.\" NOTE: This file is generated, DO NOT EDIT.
|