Show Call Graph Error (cannot be displayed because it contains errors)

[davidb2002]

Apologies if this is addressed in other issues.

I have the latest stable release of webgrind and every time I 'Show call Graph' I get the error:

The Image "(image generation url)" cannot be displayed because it contains errors

Any ideas how to fix this?

[lexonight]

open webgrind wherever it is located on your computer.
if you don't have graphviz download it and install it or download the appropriate package
Edit config.php find this and set the paths to the appropriate paths:
/**
* Path to python executable
*/
static $pythonExecutable = '/usr/bin/python';

/**
* Path to graphviz dot executable
*/  
static $dotExecutable = '/usr/bin/dot';

[tcamin]

Hi,

I have graphviz installed (dot is under /usr/bin/dot) and have updated the config.php file accordingly, Still no go on the image generation, anything else I should check?

[dland]

yeah, I'm having a similar problem. Both dot and python are installed. The problem is that library/gprof2dot.py isn't producing any useful output. All it manages to generate is the following preamble:

digraph {
    graph [ranksep=0.25, fontname=Arial, nodesep=0.125];
    node [fontname=Arial, style=filled, height=0, width=0, shape=box, fontcolor=white];
    edge [fontname=Arial];
}

Oddly enough, that won't produce a very interesting picture...

[bananaumai]

Hi, i also faced same problem.

In my case, i found it was caused by xdebug setting - xdebug.profiler_append

When "xdebug.profiler_append = 1" in php.ini, different request is mapped to the same cachegrind file, which gprof2dot.py cannot parse properly. So, setting "xdebug.profiler_append = 0" in php.ini, I could see the call graph properly.

[sameg14]

the dot executable is referenced incorrectly in the config file.
the correct location, on ubuntu, is

static $dotExecutable = '/usr/bin/dot';

Before this you need to install graphviz

sudo apt-get install graphviz 

[marcioAlmada]

In my case, the generated image is always a 11x11 blank png. Any ideas why?

[unilama]

I also have empty graph - using last version of Webgrind (from github) and xdebug version 2.1.0

[samrae]

Thanks @bananaumai. That worked for me.

[naillizard]

For brew

brew install graphviz

---

after installation

config.php

static $dotExecutable = '/usr/local/Cellar/graphviz/x.xx.x/bin/dot';

[imme-emosol]

i replaced the gprof2dot.py with a symbolic link to a checkout of the script ( http://code.google.com/p/jrfonseca/wiki/Gprof2Dot ) in José Fonseca's utilitities via :
http://code.google.com/p/jrfonseca/source/checkout?repo=gprof2dot .

[danielhunt]

I'm having problems with this too - a 'missing image' icon is present in Chrome.

(I'm running on OSX - Mountain Lion)
I've debugged the execution of the script in question, in index.php (line 151), and discovered that there were some issues with my tools setup:

/usr/local/bin/dot -Tpng -o /private/var/tmp/cachegrind.out.86257-10.webgrind.pngdyld: Library not loaded: /usr/lib/libltdl.7.dylib
  Referenced from: /usr/local/bin/dot
  Reason: image not found
Trace/BPT trap: 5

To fix this, I did the following (I have homebrew installed already) :

brew install imagemagick
brew link -f imagemagick
brew install graphicsmagick
brew install libtool --universal
brew link libtool

Following this, it all worked as expected.
I think you should work on your error handling as this will likely affect many others on OSX - the exec in particular is problematic, as you're not checking after the exec completes, to see if the image file has been created (no error is output to the screen).

[samtuke]

In my case, the generated image is always a 11x11 blank png

Same problem here. Graphviz & python installed and correct in webgrind config file here (Feedora 17).

[StevenMapes]

Has anyone managed to get it to work on a Windows box at all? Graphviz that is

[StevenMapes]

Okay I have it working on Windows for anyone who wants to know what to do.

1. Download python and Graphviz and install them as usual then start editing the PHP files.
2. Add a static property to Webgrind_Config called $webgrindPath which is the path to the webgrind web accessible folder
3. Change the $pythonExecutable and $dotExecutable properties to point at your Python and Graphiviz files
4. Edit index.php and change line 152 (the shell_exec line) so that it includes the webgrind path before the libary/gprof2dot.py as it requires a absolute path to work

So here's an example:

config.php changes

/**
* Path to python executable
*/ 
static $pythonExecutable = 'C:\Python27\python.exe'; // '/usr/bin/python';

/**
* Path to graphviz dot executable
*/  
static $dotExecutable = '"C:\Program Files (x86)\Graphviz 2.28\bin\dot.exe"'; //'/usr/local/bin/dot';

/**
 * Path to the webgrind installation
 */
static $webgrindPath = 'C:\\wamp\\www\\webgrind\\';

index.php changes

shell_exec(Webgrind_Config::$pythonExecutable.' '.Webgrind_Config::$webgrindPath.'library/gprof2dot.py -n '.$showFraction.' -f callgrind '.Webgrind_Config::xdebugOutputDir().''.$dataFile.' | '.Webgrind_Config::$dotExecutable.' -Tpng -o ' . $filename);

[tenken]

@syntheticintel This worked for me from webgrind-master and Ubuntu 12.04.

[ghost]

I'm running on OSX - Mountain Lion

line 152 in index.php

shell_exec(Webgrind_Config::$pythonExecutable.' library/gprof2dot.py -n '.$showFraction.' -f callgrind '.Webgrind_Config::xdebugOutputDir().''.$dataFile.' | '.Webgrind_Config::$dotExecutable.' -Tpng -o ' . $filename);

dosn't work, but when run in command line, for example:

/opt/local/bin/python library/gprof2dot.py -n 10 -f callgrind /[path]/xdebug-profiles/xdebug-profile..1359480333 | /usr/local/bin/dot -Tpng -o /[path]/xdebug-profiles/webgrind-cachegrind/xdebug-profile..1359480333-10.webgrind.png

class graph is generated.

Any ideas?

[naillizard]

check your conf.php for $pythonExecutable it looks like you might have a different path setup there.

try which python from the terminal to see where it is installed and update the path on conf.php

[naillizard]

also check for your $doExecutable...

[ghost]

$pythonExecutable

and

$dotExecutable

are set.

I have data from python, i have problem with dot, from cli - ok, but from _shell_exec_ :/

$return = shell_exec('/[dot_path]/dot -V');

$return is null :(

PHP 5.4.4, MAMP server - I spent many hours and nothing ...

[naillizard]

did you use brew to install dot?

[naillizard]

After installing dot with brew I had to set $dotExecutable to:

static $dotExecutable = '/usr/local/Cellar/graphviz/2.28.0/bin/dot';

[ghost]

No, port, dot installed with imagemagick.

[naillizard]

my bad, yeah graphviz installed via imagemagick, but search in /usr/local/Cellar for graphviz dir.

[naillizard]

I had problems when setting up webgrind, and turns out was just to do with the paths, from command line everything worked for me...

[ghost]

mkjasinski@machine ~ $ /usr/local/bin/dot -V
dot - graphviz version 2.30.0 (20130114.0426)
mkjasinski@machine ~ $ 

and $dotExecutable is set to:

static $dotExecutable = '/usr/local/bin/dot';

I have no idea on this, from command line everything worked ...

For phpDocumentator dot works perfectly.

OK, a have bug:

dyld: Symbol not found: __cg_jpeg_resync_to_restart
  Referenced from: /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libTIFF.dylib
  Expected in: /Applications/MAMP/Library/lib/libJPEG.dylib
 in /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources/libTIFF.dylib

OK my friends - SOLUTION

vim /Applications/MAMP/Library/bin/envvars
#DYLD_LIBRARY_PATH="/Applications/MAMP/Library/lib:$DYLD_LIBRARY_PATH"
#export DYLD_LIBRARY_PATH

Have fun!

[naillizard]

are you able to run

mkjasinski@machine ~ $ dot -V

On 30/01/2013, at 9:16 AM, Marcin notifications@github.com wrote:

mkjasinski@machine ~ $ /usr/local/bin/dot -V
dot - graphviz version 2.30.0 (20130114.0426)
mkjasinski@machine ~ $
and $dotExecutable is set to:

static $dotExecutable = '/usr/local/bin/dot';
I have no idea on this, from command line everything worked ...

—
Reply to this email directly or view it on GitHub.

[ghost]

Yes, all is ok :)

[gurpr33t]

When I click on Show Call Graph button, it opens new page with this error:
The image “http://localhost/webgrind/index.php?dataFile=cachegrind.out.1366388401.7920&showFraction=1&op=function_graph” cannot be displayed because it contains errors.
How to make it work?

[eddiejaoude]

@lexonight comment, about incorrect paths in the config solved my issue. I removed 'local' out of the path & it now works

[bbaaxx]

In case you are forced ;) to use XAMPP in Windows this worked fine for me:

/**
* Path to python executable
*/ 
static $pythonExecutable = 'C:\Python27\python.exe';

/**
* Path to graphviz dot executable
*/  
static $dotExecutable = 'C:\Graphviz2.30\bin\dot.exe';

[saada]

Installing graphviz and changing the $dotExecutable path to /usr/bin/dot worked for me on Ubuntu! Thanks guys! 👍

[ghost]

Use this : http://gprof2dot.jrfonseca.googlecode.com/git/gprof2dot.py

[michaelhyde]

Thank you GiumDev! That did it for me (XAMPP).

[nabab]

In Windows in XAMPP it's telling me "The image 'http://xxx/__grind/index.php?dataFile=0&showFraction=0.9&op=function_graph' cannot be displayed because it contains errors".
I have set config.php as adviced above by bbaaxx (the path are right for my system).

[slein87]

Few providers / clients disable the shell_exec function via "disable_functions" in the php.ini. This will result in a white page when opening the call graph.

[naillizard]

On-prem server. I can use shell_exec, its not disabled. Clicking on the
Show Call Graph button opens a new page and takes a while to run "guess its
doing its job" but it doesn't save the image. I've already given DefaultApp
full permissions on the directory with icacls and also full permissions to
all users to test and still doesn't work, I'll keep trying and update this
ticket if I find a fix.

FYI.
Running on Windows 8x64
IIS 8 with PHP 5.6 and xdebug 2.2.5
Python 2.7.8 and dot 2.38.0

On 16 December 2014 at 04:05, slein87 notifications@github.com wrote:

Few providers / clients disable the shell_exec function via
"disable_functions" in the php.ini. This will result in a white page when
opening the call graph.

—
Reply to this email directly or view it on GitHub
#22 (comment).

[vaughany]

Thanks @sameg14, got it working in Ubuntu 14.04. 👍

[sameg14]

@vaughany You're very welcome!

[GRMule]

I was having trouble getting this to work on Windows 7 as well. For starters, the changes suggested by StevenMapes were necessary. Also necessary was moving GraphViz from the default installation folder (for me, C:\Program Files (x86)\GraphViz) to something without spaces: C:\dot. I tried putting quotes around the path, but I couldn't find a combination that shell_exec liked.

[ve3]

@StevenMapes Also works for me except that I did not change anything about index.php shell_exec().

My configuration:

/**
* Path to python executable
*/ 
static $pythonExecutable = 'C:\\Python27\\python.exe';

/**
* Path to graphviz dot executable
*/  
static $dotExecutable = '"C:\\Graphviz2.38\\bin\\dot.exe"';

I was tried Python 3.5 but it is not working, change to 2.7 works fine.

[dbiagi]

I followed the @ve3 solution, and worked fine for me. Thanks =)
I'm using windows btw.

[iranianpep]

For those who use MAMP. After changing the config.php and setting the path you must restart the server. It worked for me.

[sylvainraye]

By me I have issue to get the svg file cause of error returned by the python gprof2dot script:

vagrant@jelmoli:/vagrant/htdocs/magento/src/webgrind-master$ /usr/bin/python library/gprof2dot.py -n 10 -f callgrind '/vagrant/cachegrind/cachegrind.out.17500' | /usr/bin/dot -Tsvg -o '/tmp/cachegrind.out.17500-10.webgrind.svg'
Traceback (most recent call last):
  File "library/gprof2dot.py", line 3185, in <module>
    main()
  File "library/gprof2dot.py", line 3149, in main
    profile = parser.parse()
  File "library/gprof2dot.py", line 1569, in parse
    self.profile.integrate(TOTAL_TIME_RATIO, TIME_RATIO)
  File "library/gprof2dot.py", line 478, in integrate
    self._integrate_function(function, outevent, inevent)
  File "library/gprof2dot.py", line 483, in _integrate_function
    return self._integrate_cycle(function.cycle, outevent, inevent)
  File "library/gprof2dot.py", line 538, in _integrate_cycle
    assert abs(call_ratio*total - partial) <= 0.001*call_ratio*total
AssertionError
vagrant@jelmoli:/vagrant/htdocs/magento/src/webgrind-master$

[alpha0010]

@diglin gprof2dot is maintained here. Does this same error occur using the upstream script? If so, please report there.

[sylvainraye]

@alpha0010 yes it does. I'm using a vagrant machine with Ubuntu 14.04 with Python 2.7.6

[alpha0010]

It appears that is a known issue, that does not have a current plan for a fix. (If you think your case is different, please report on jrfonseca/gprof2dot.)

[sylvainraye]

Ok thanks Envoi depuis mon mobile

…

Le 29 nov. 2016 à 02:46, Alpha ***@***.***> a écrit : It appears that is a known issue, that does not have a current plan for a fix. (If you think your case is different, please report on jrfonseca/gprof2dot.) — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.

[alpha0010]

To all involved: this is a rather extended thread comprising of a variety of issues, which may or may not be outdated. Closing this ticket; if your issue is still applicable, please open a new ticket.

[vanyabrovary]

apt-get install python3-graphviz

At config.php change python to python3
static $pythonExecutable = '/usr/bin/python3';

And it works.