mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-27 01:27:39 +01:00
80 lines
2.7 KiB
TeX
80 lines
2.7 KiB
TeX
\documentclass{article}
|
|
\usepackage[fancyhdr,pdf]{latex2man}
|
|
|
|
\input{common.tex}
|
|
|
|
\begin{document}
|
|
|
|
\begin{Name}{3}{unw\_set\_caching\_policy}{David Mosberger-Tang}{Programming Library}{unw\_set\_caching\_policy}unw\_set\_caching\_policy -- set unwind caching policy
|
|
\end{Name}
|
|
|
|
\section{Synopsis}
|
|
|
|
\File{\#include $<$libunwind.h$>$}\\
|
|
|
|
\Type{int} \Func{unw\_set\_caching\_policy}(\Type{unw\_addr\_space\_t} \Var{as}, \Type{unw\_caching\_policy\_t} \Var{policy});\\
|
|
|
|
\section{Description}
|
|
|
|
The \Func{unw\_set\_caching\_policy}() routine sets the caching policy
|
|
of address space \Var{as} to the policy specified by argument
|
|
\Var{policy}. The \Var{policy} argument can take one of three
|
|
possible values:
|
|
\begin{description}
|
|
\item[\Const{UNW\_CACHE\_NONE}] Turns off caching completely. This
|
|
also implicitly flushes the contents of all caches as if
|
|
\Func{unw\_flush\_cache}() had been called.
|
|
\item[\Const{UNW\_CACHE\_GLOBAL}] Enables caching using a global cache
|
|
that is shared by all threads. If global caching is unavailable or
|
|
unsupported, \Prog{libunwind} may fall back on using a per-thread
|
|
cache, as if \Const{UNW\_CACHE\_PER\_THREAD} had been specified.
|
|
\item[\Const{UNW\_CACHE\_PER\_THREAD}] Enables caching using
|
|
thread-local caches. If a thread-local caching are unavailable or
|
|
unsupported, \Prog{libunwind} may fall back on using a global cache,
|
|
as if \Const{UNW\_CACHE\_GLOBAL} had been specified.
|
|
\end{description}
|
|
|
|
If caching is enabled, an application must be prepared to make
|
|
appropriate calls to \Func{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,
|
|
\Func{unw\_flush\_cache}() would have to be called (at least) for the
|
|
address-range that was covered by the shared library.
|
|
|
|
For address spaces created via \Func{unw\_create\_addr\_space}(3),
|
|
caching is turned off by default. For the local address space
|
|
\Func{unw\_local\_addr\_space}, caching is turned on by default.
|
|
|
|
\section{Return Value}
|
|
|
|
On successful completion, \Func{unw\_set\_caching\_policy}() returns 0.
|
|
Otherwise the negative value of one of the error-codes below is
|
|
returned.
|
|
|
|
\section{Thread and Signal Safety}
|
|
|
|
\Func{unw\_set\_caching\_policy}() is thread-safe but \emph{not} safe
|
|
to use from a signal handler.
|
|
|
|
\section{Errors}
|
|
|
|
\begin{Description}
|
|
\item[\Const{UNW\_ENOMEM}] The desired caching policy could not be
|
|
established because the application is out of memory.
|
|
\end{Description}
|
|
|
|
\section{See Also}
|
|
|
|
\SeeAlso{libunwind(3)},
|
|
\SeeAlso{unw\_create\_addr\_space(3)},
|
|
\SeeAlso{unw\_flush\_cache(3)}
|
|
|
|
\section{Author}
|
|
|
|
\noindent
|
|
David Mosberger-Tang\\
|
|
Email: \Email{dmosberger@gmail.com}\\
|
|
WWW: \URL{http://www.nongnu.org/libunwind/}.
|
|
\LatexManEnd
|
|
|
|
\end{document}
|