forked from OSchip/llvm-project
105 lines
3.5 KiB
ReStructuredText
105 lines
3.5 KiB
ReStructuredText
.. _index:
|
|
|
|
=======================
|
|
libunwind LLVM Unwinder
|
|
=======================
|
|
|
|
Overview
|
|
========
|
|
|
|
libunwind is an implementation of the interface defined by the HP libunwind
|
|
project. It was contributed by Apple as a way to enable clang++ to port to
|
|
platforms that do not have a system unwinder. It is intended to be a small and
|
|
fast implementation of the ABI, leaving off some features of HP's libunwind
|
|
that never materialized (e.g. remote unwinding).
|
|
|
|
The unwinder has two levels of API. The high level APIs are the `_Unwind_*`
|
|
functions which implement functionality required by `__cxa_*` exception
|
|
functions. The low level APIs are the `unw_*` functions which are an interface
|
|
defined by the old HP libunwind project.
|
|
|
|
Getting Started with libunwind
|
|
------------------------------
|
|
|
|
.. toctree::
|
|
:maxdepth: 2
|
|
|
|
BuildingLibunwind
|
|
|
|
Current Status
|
|
--------------
|
|
|
|
libunwind is a production-quality unwinder, with platform support for DWARF
|
|
unwind info, SjLj, and ARM EHABI.
|
|
|
|
The low level libunwind API was designed to work either in-process (aka local)
|
|
or to operate on another process (aka remote), but only the local path has been
|
|
implemented. Remote unwinding remains as future work.
|
|
|
|
Platform and Compiler Support
|
|
-----------------------------
|
|
|
|
libunwind is known to work on the following platforms:
|
|
|
|
============ ======================== ============ ========================
|
|
OS Arch Compilers Unwind Info
|
|
============ ======================== ============ ========================
|
|
Any i386, x86_64, ARM Clang SjLj
|
|
Bare Metal ARM Clang, GCC EHABI
|
|
FreeBSD i386, x86_64, ARM64 Clang DWARF CFI
|
|
iOS ARM Clang SjLj
|
|
Linux ARM Clang, GCC EHABI
|
|
Linux i386, x86_64, ARM64 Clang, GCC DWARF CFI
|
|
macOS i386, x86_64 Clang, GCC DWARF CFI
|
|
NetBSD x86_64 Clang, GCC DWARF CFI
|
|
Windows i386, x86_64, ARM, ARM64 Clang DWARF CFI
|
|
============ ======================== ============ ========================
|
|
|
|
The following minimum compiler versions are strongly recommended.
|
|
|
|
* Clang 3.5 and above
|
|
* GCC 4.7 and above.
|
|
|
|
Anything older *may* work.
|
|
|
|
Notes and Known Issues
|
|
----------------------
|
|
|
|
* TODO
|
|
|
|
|
|
Getting Involved
|
|
================
|
|
|
|
First please review our `Developer's Policy <http://llvm.org/docs/DeveloperPolicy.html>`__
|
|
and `Getting started with LLVM <http://llvm.org/docs/GettingStarted.html>`__.
|
|
|
|
**Bug Reports**
|
|
|
|
If you think you've found a bug in libunwind, please report it using
|
|
the `LLVM Bugzilla`_. If you're not sure, you
|
|
can post a message to the `cfe-dev mailing list`_ or on IRC.
|
|
Please include "libunwind" in your subject.
|
|
|
|
**Patches**
|
|
|
|
If you want to contribute a patch to libunwind, the best place for that is
|
|
`Phabricator <http://llvm.org/docs/Phabricator.html>`_. Please include [libunwind] in the subject and
|
|
add `cfe-commits` as a subscriber. Also make sure you are subscribed to the
|
|
`cfe-commits mailing list <http://lists.llvm.org/mailman/listinfo/cfe-commits>`_.
|
|
|
|
**Discussion and Questions**
|
|
|
|
Send discussions and questions to the
|
|
`cfe-dev mailing list <http://lists.llvm.org/mailman/listinfo/cfe-dev>`_.
|
|
Please include [libunwind] in the subject.
|
|
|
|
|
|
Quick Links
|
|
===========
|
|
* `LLVM Homepage <http://llvm.org/>`_
|
|
* `LLVM Bugzilla <https://bugs.llvm.org/>`_
|
|
* `cfe-commits Mailing List`_
|
|
* `cfe-dev Mailing List`_
|
|
* `Browse libunwind Sources <https://github.com/llvm/llvm-project/blob/master/libunwind/>`_
|