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<chapter>
<header>
<copyright>
<year>2004</year><year>2011</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
The contents of this file are subject to the Erlang Public License,
Version 1.1, (the "License"); you may not use this file except in
compliance with the License. You should have received a copy of the
Erlang Public License along with this software. If not, it can be
retrieved online at http://www.erlang.org/.
Software distributed under the License is distributed on an "AS IS"
basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
the License for the specific language governing rights and limitations
under the License.
</legalnotice>
<title>Tools Release Notes</title>
<prepared></prepared>
<docno></docno>
<date></date>
<rev></rev>
<file>notes.xml</file>
</header>
<p>This document describes the changes made to the Tools application.</p>
<section><title>Tools 2.6.6.3</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Declare indentation options as "safe" in erlang-mode for
Emacs</p>
<p>
Emacs has a facility for setting options on a per-file
basis based on comments in the source file. By default,
all options are considered "unsafe", and the user is
queried before the variable is set. This patch declares
the variables erlang-indent-level, erlang-indent-guard
and erlang-argument-indent to be safe, if the value
specified in the source file is valid.</p>
<p>
Such declarations usually look like this:</p>
<p>
%% -*- erlang-indent-level: 2 -*-</p>
<p>
and appear on the first line of the file. (thanks to
Magnus Henoch)</p>
<p>
Own Id: OTP-9122</p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Cover has been improved to take less memory and allow
parallel analysis of cover data. Data collection from
nodes is now done in parallel and it is now possible to
issue multiple analyse and analyse_to_file requests at
the same time. A new function call async_analyse_to_file
has also been introduced, see the documentation for more
details.</p>
<p>
Own Id: OTP-9043 Aux Id: seq11771 </p>
</item>
</list>
</section>
</section>
<section><title>Tools 2.6.6.2</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>eprof: API sort mismatch has now been fixed. </p>
<p>
Own Id: OTP-8853</p>
</item>
<item>
<p>
eprof: fix division by zero in statistics</p>
<p>
Own Id: OTP-8963</p>
</item>
</list>
</section>
</section>
<section><title>Tools 2.6.6.1</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
<c>cover</c> will now show ampersand characters in the
source code correctly. (Thanks to Tom Moertel.)</p>
<p>
Own Id: OTP-8776</p>
</item>
</list>
</section>
</section>
<section><title>Tools 2.6.6</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>A race condition affecting Cover has been removed.</p>
<p>
Own Id: OTP-8469</p>
</item>
<item>
<p>
Emacs improvements:</p>
<p>
Fixed emacs-mode installation problems.</p>
<p>
Fixed a couple of -spec and -type indentation and
font-lock problems.</p>
<p>
Fixed error messages on emacs-21.</p>
<p>
Magnus Henoch fixed several issues.</p>
<p>
Ralf Doering, Klas Johansson and Chris Bernard
contributed various emacs-eunit improvements.</p>
<p>
Klas Johansson and Dave Peticolas added emacs-flymake
support.</p>
<p>
Own Id: OTP-8530</p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>Xref has been updated to use the <c>re</c> module
instead of the deprecated <c>regexp</c> module.</p>
<p>
*** POTENTIAL INCOMPATIBILITY ***</p>
<p>
Own Id: OTP-8472</p>
</item>
<item>
<p>When given the option <c>{builtins,true}</c> Xref now
adds calls to operators.</p>
<p>
Own Id: OTP-8647</p>
</item>
<item>
<p><c>eprof</c> has been reimplemented with support in
the Erlang virtual machine and is now both faster (i.e.
slows down the code being measured less) and scales much
better. In measurements we saw speed-ups compared to the
old eprof ranging from 6 times (for sequential code that
only uses one scheduler/core) up to 84 times (for
parallel code that uses 8 cores).</p>
<p>Note: The API for the <c>eprof</c> has been cleaned up
and extended. See the documentation.</p>
<p>
*** POTENTIAL INCOMPATIBILITY ***</p>
<p>
Own Id: OTP-8706</p>
</item>
</list>
</section>
</section>
<section><title>Tools 2.6.5.1</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>A bug concerning bit comprehensions has been fixed
in Cover. The bug was introduced in R13B03.
(Thanks to Matthew Sackman.)</p>
<p>Own Id: OTP-8340</p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Add lock profiling tool.</p>
<p>
The Lock profiling tool, lcnt, can make use of the
internal lock statistics when the runtime system is built
with this feature enabled.</p>
<p>
This provides a mechanism to examine potential lock
bottlenecks within the runtime itself.</p>
<p>
- Add erts_debug:lock_counters({copy_save, bool()}). This
option enables or disables statistics saving for
destroyed processes and ets-tables. Enabling this might
consume a lot of memory.</p>
<p>
- Add id-numbering for lock classes which is otherwise
undefined.</p>
<p>
Own Id: OTP-8424</p>
</item>
<item>
<p>
emacs: Moved code skeletons to a separate file and and
added a configurable variable to choose skeleton. Thanks
Dave Peticolas.</p>
<p>
Own Id: OTP-8446</p>
</item>
</list>
</section>
</section>
<section><title>Tools 2.6.5</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>The coverage analysis tool <c>cover</c> has been
improved when it comes to handling list and bit string
comprehensions (a counter for each qualifier), bit syntax
expressions (the Value and Size expressions), and try
expressions (the body called <c>Exprs</c> in the Reference
Manual). A few (not all) situations where several
expressions are put on the same line are also handled
better than before.</p>
<p>Own Id: OTP-8188 Aux Id: seq11397</p>
</item>
<item>
<p>When loading Cover compiled code on remote nodes
running code in the loaded module, a <c>badarg</c>
failure was sometimes the result. This bug has been fixed.</p>
<p>Own Id: OTP-8270 Aux Id: seq11423</p>
</item>
<item>
<p>The short-circuit operators <c>andalso</c> and
<c>orelse</c> are now handled correctly by the coverage
analysis tool <c>cover</c> (it is no longer checked
that the second argument returns a Boolean value.)</p>
<p>Own Id: OTP-8273</p>
</item>
</list>
</section>
</section>
<section><title>Tools 2.6.4</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p><c>cover</c> now properly escapes greater-than and
less-than characters in comments in HTML reports. (Thanks
to Magnus Henoch.)</p>
<p>
Own Id: OTP-7939</p>
</item>
</list>
</section>
</section>
<section><title>Tools 2.6.3</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
xref:start/1 does now allow anonymous XREF processes to
be started</p>
<p>
Own Id: OTP-7831</p>
</item>
</list>
</section>
</section>
<section><title>Tools 2.6.2</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>A bug in the Xref scanner has been fixed.</p>
<p>
Own Id: OTP-7423</p>
</item>
<item>
<p>A bug in Fprof where the function 'undefined' appeared
to call 'undefined' has been corrected.</p>
<p>
Own Id: OTP-7509</p>
</item>
</list>
</section>
</section>
<section><title>Tools 2.6.1</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>The documentation has been updated so as to reflect
the last updates of the Erlang shell as well as the minor
modifications of the control sequence <c>p</c> of the
<c>io_lib</c> module.</p> <p>Superfluous empty lines have
been removed from code examples and from Erlang shell
examples.</p>
<p>
Own Id: OTP-6944 Aux Id: OTP-6554, OTP-6911 </p>
</item>
<item>
<p><c>tuple_size/1</c> and <c>byte_size/1</c> have been
substituted for <c>size/1</c>.</p>
<p>
Own Id: OTP-7009</p>
</item>
<item>
<p>The coverage analysis tool <c>cover</c> now handles
the short-circuit Boolean expressions <c>andalso/2</c>
and <c>orelse/2</c> properly.</p>
<p>
Own Id: OTP-7095</p>
</item>
</list>
</section>
</section>
<section><title>Tools 2.6</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
The <c>cover</c> tool could use huge amounts of memory
when used in a distributed system.</p>
<p>
Own Id: OTP-6758</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.5.5</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>Missing buffer-local declaration in erlang.el has been
added. Before this fix there could arise problems in
other emacs modes after visiting a buffer using the
erlang mode.</p>
<p>Own Id: OTP-6721</p>
</item>
<item>
<p>Key-map for 'backward-delete-char-untabif updated to work
properly with Xemacs.</p>
<p>Own Id: OTP-6723</p>
</item>
</list>
</section>
<section>
<title>Improvements and New Features</title>
<list type="bulleted">
<item>
<p>Minor updates of Xref.</p>
<p>Own Id: OTP-6586</p>
</item>
<item>
<p>Minor Makefile changes.</p>
<p>Own Id: OTP-6689 Aux Id: OTP-6742 </p>
</item>
<item>
<p>"C-u C-c C-k" now does a compile with both "debug_info"
and "export_all".</p>
<p>Own Id: OTP-6741</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.5.4.1</title>
<section>
<title>Improvements and New Features</title>
<list type="bulleted">
<item>
<p>Changes due to internal interface changes in the erts
application which are needed at compile-time. No
functionality has been changed.</p>
<p>Own Id: OTP-6611 Aux Id: OTP-6580 </p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.5.4</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>Made change to support the function erlang-find-tag for
xemacs and emacs-21.</p>
<p>Own Id: OTP-6512</p>
</item>
</list>
</section>
<section>
<title>Improvements and New Features</title>
<list type="bulleted">
<item>
<p>Minor updates of xref for future compatibility.</p>
<p>Own Id: OTP-6513</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.5.3</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p><c>eprof</c> did not work reliably in the SMP emulator,
because the trace receiver process could not process the
trace messages fast enough. Therefore, <c>eprof</c> now
blocks the other schedulers while profiling.</p>
<p>Own Id: OTP-6373</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.5.2</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>Fprof traces could become truncated for the SMP emulator.
This bug has now been corrected.</p>
<p>Own Id: OTP-6246</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.5.1</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>eprof now works somewhat better in the SMP emulator.</p>
<p>Own Id: OTP-6152</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.5</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>Fixed some bugs in <c>make</c>:</p>
<p><c>make:files/1,2</c> can now handle a file in another
directory as argument, similar to <c>make:all/0,1</c>.</p>
<p>When specifying a file name including the <c>.erl</c>
extension in <c>Emakefile</c>, <c>make:all/0,1</c> looked
for the object code in the wrong place.</p>
<p>When specifying a file name including the <c>.erl</c>
extension in <c>Emakefile</c> and some compile options
for the file, <c>make:files/0,1</c> did not use the
options as it should do.</p>
<p>Own Id: OTP-6057 Aux Id: seq10299</p>
</item>
<item>
<p><c>cover</c>: When <c>cover:stop()</c> was called,
the cover compiled code was not unloaded (as stated in
the documentation) but simply marked as 'old'. This
meant that processes lingering in (or with funs
referencing to) the cover compiled code would survive
even when the cover server and its ETS tables was
terminated.</p>
<p>Now the cover compiled code is unloaded, meaning that
processes lingering in/with references to it will be
killed when <c>cover:stop</c> is called, instead of
later crashing with <c>badarg</c> when trying to bump
counters in ETS tables no longer existing.</p>
</item>
</list>
</section>
<section>
<title>Improvements and New Features</title>
<list type="bulleted">
<item>
<p>Replaced call to deprecated function
<c>file:file_info/1</c> with call to
<c>filelib:is_dir/1</c> and <c>filelib:is_regular/1</c>
in <c>tags.erl</c>.</p>
<p>Own Id: OTP-6079</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.4.7</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>A bug in <c>fprof</c> profiling causing erroneous
inconsistent trace failure has been corrected.</p>
<p>Own Id: OTP-5922 Aux Id: seq10203 </p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.4.6</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>Emacs: <c>erlang-man-function</c> and
<c>erlang-man-module</c> used a pattern matching to find
the requested module that sometimes yielded unexpected
results. For example, <c>erlang-man-module file</c> would
display the man page for <c>CosFileTransfer_File</c>.</p>
<p>Own Id: OTP-5746 Aux Id: seq10096</p>
</item>
<item>
<p>Some compiler warnings and Dialyzer warnings were
eliminated in the Tools application.</p>
<p>When tracing to a port (which <c>fprof</c> does),
there could be fake schedule out/schedule in messages
sent for a process that had exited.</p>
<p>Own Id: OTP-5757</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.4.5</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>The cross reference tool <c>xref</c> did not handle the new
<c>fun M:F/A</c> construct properly. This problem has been
fixed.</p>
<p>Own Id: OTP-5653</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.4.4</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>The <c>cover</c> tool did not escape '<' and '>' not
being part of HTML tags in HTML log files.</p>
<p>Own Id: OTP-5588</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.4.3</title>
<section>
<title>Improvements and New Features</title>
<list type="bulleted">
<item>
<p>It is now possible to encrypt the debug information in
beam files, to help keep the source code secret. See
<c>compile(3)</c> for how to provide the key for encrypting,
and <c>beam_lib(3)</c> for how to provide the key for
decryption so that tools such as Debugger, <c>xref</c>, or
<c>cover</c> can be used.</p>
<p>The <c>beam_lib:chunks/2</c> functions now accepts an
additional chunk type '<c>compile_info</c>' to retrieve
the compilation information directly as a term. (Thanks
to Tobias Lindahl.)</p>
<p>Own Id: OTP-5460 Aux Id: seq9787</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.4.2</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>The <c>cover</c> tool could not analyze empty modules on
module level.</p>
<p>Own Id: OTP-5418</p>
</item>
</list>
</section>
</section>
<section>
<title>Tools 2.4.1</title>
<section>
<title>Fixed Bugs and Malfunctions</title>
<list type="bulleted">
<item>
<p>The <c>xref</c> analysis <c>locals_not_used</c> could
return too many functions. This problem has been fixed.</p>
<p>Own Id: OTP-5071</p>
</item>
<item>
<p>The <c>cover</c> tool could not always compile parse
transformed modules. This problem has been fixed.</p>
<p>Own Id: OTP-5305</p>
</item>
</list>
</section>
</section>
</chapter>
