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llvm-mirror/docs/CommandGuide/llvm-addr2line.rst
Richard Smith be765b5d17 llvm-addr2line: assume addresses on the command line are hexadecimal rather than attempting to guess the base based on the form of the number.
Summary:
This matches the behavior of GNU addr2line. We previously treated
hexadecimal addresses as binary if they started with 0b, otherwise as
octal if they started with 0, otherwise as decimal.

This only affects llvm-addr2line; the behavior of llvm-symbolize is
unaffected.

Reviewers: ikudrin, rupprecht, jhenderson

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D73306
2020-04-16 16:16:21 -07:00

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llvm-addr2line - a drop-in replacement for addr2line
====================================================
.. program:: llvm-addr2line
SYNOPSIS
--------
:program:`llvm-addr2line` [*options*]
DESCRIPTION
-----------
:program:`llvm-addr2line` is an alias for the :manpage:`llvm-symbolizer(1)`
tool with different defaults. The goal is to make it a drop-in replacement for
GNU's :program:`addr2line`.
Here are some of those differences:
- ``llvm-addr2line`` interprets all addresses as hexadecimal and ignores an
optional ``0x`` prefix, whereas ``llvm-symbolizer`` attempts to determine
the base from the literal's prefix and defaults to decimal if there is no
prefix.
- ``llvm-addr2line`` defaults not to print function names. Use `-f`_ to enable
that.
- ``llvm-addr2line`` defaults not to demangle function names. Use `-C`_ to
switch the demangling on.
- ``llvm-addr2line`` defaults not to print inlined frames. Use `-i`_ to show
inlined frames for a source code location in an inlined function.
- ``llvm-addr2line`` uses `--output-style=GNU`_ by default.
- ``llvm-addr2line`` parses options from the environment variable
``LLVM_ADDR2LINE_OPTS`` instead of from ``LLVM_SYMBOLIZER_OPTS``.
SEE ALSO
--------
:manpage:`llvm-symbolizer(1)`
.. _-f: llvm-symbolizer.html#llvm-symbolizer-opt-f
.. _-C: llvm-symbolizer.html#llvm-symbolizer-opt-c
.. _-i: llvm-symbolizer.html#llvm-symbolizer-opt-i
.. _--output-style=GNU: llvm-symbolizer.html#llvm-symbolizer-opt-output-style