{"id":27,"date":"2007-08-23T06:24:28","date_gmt":"2007-08-23T11:24:28","guid":{"rendered":"http:\/\/www.visophyte.org\/blog\/2007\/08\/23\/chroniquery-slightly-more-chronoriffic\/"},"modified":"2009-03-15T07:50:22","modified_gmt":"2009-03-15T12:50:22","slug":"chroniquery-slightly-more-chronoriffic","status":"publish","type":"post","link":"https:\/\/www.visophyte.org\/blog\/2007\/08\/23\/chroniquery-slightly-more-chronoriffic\/","title":{"rendered":"Chroniquery slightly more chronoriffic"},"content":{"rendered":"

So, I was playing with the fantastic Chronomancer (roc<\/a>‘s announcement<\/a>, project link<\/a>), an Eclipse GUI for chronicle-recorder<\/a>, using a trace from my PyXPCOM troubles. I discovered a lack of some symbols that seemed like they should be there and decided to then run chronicle against chronicle-query and view the problem in Chronomancer so that I might smite it. Unfortunately, some stuff didn’t show up in that trace, so I went investigating by way of enhancing chroniquery so that I might better understand the problem while also making chroniquery more usable. Sadly, there’s still more work to be done, but I have a picture to show and I understand a good deal of the chronomancer internals now and how to drive chronicle-query better.<\/p>\n

\"chroniquery<\/p>\n

The above is pretty representative of what chroniquery’s chronisole can now do. It’s an invocation of chronisole.py trace fancy -f main<\/em>. The ‘fancy’ program builds a linked list using ‘cons’, uses the recursive ‘print_list’ to print the list, and uses the iterative ‘nuke’ to delete entries from the list. ‘cons’ returns the newly allocated list entry\/cons cell, and nuke returns 0 if the entry existed and was nuked or 1 if it didn’t exist. We traced main because of the -f; we could start with any bunch of functions as the root, and can use -x to filter out noisy functions from the recursive function discovery. Return values and parameters are shown.<\/p>\n

Of course, even in this example, the first\/newline booleans are wrong, presumably indicative of some wackiness\/off-by-one-error in my mechanism for determining the sub-called functions’ function entry timestamps. I’m confident I’m doing some foolish things, but it will have to wait until the weekend and a more well-rested brain. I’ve pushed the changes to the bzr tree if anyone wants to do my work for me.<\/p>\n","protected":false},"excerpt":{"rendered":"

So, I was playing with the fantastic Chronomancer (roc‘s announcement, project link), an Eclipse GUI for chronicle-recorder, using a trace from my PyXPCOM troubles. I discovered a lack of some symbols that seemed like they should be there and decided … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[7],"tags":[29,28],"class_list":["post-27","post","type-post","status-publish","format-standard","hentry","category-debugging","tag-chronicle","tag-chroniquery"],"_links":{"self":[{"href":"https:\/\/www.visophyte.org\/blog\/wp-json\/wp\/v2\/posts\/27","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.visophyte.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.visophyte.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.visophyte.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.visophyte.org\/blog\/wp-json\/wp\/v2\/comments?post=27"}],"version-history":[{"count":1,"href":"https:\/\/www.visophyte.org\/blog\/wp-json\/wp\/v2\/posts\/27\/revisions"}],"predecessor-version":[{"id":197,"href":"https:\/\/www.visophyte.org\/blog\/wp-json\/wp\/v2\/posts\/27\/revisions\/197"}],"wp:attachment":[{"href":"https:\/\/www.visophyte.org\/blog\/wp-json\/wp\/v2\/media?parent=27"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.visophyte.org\/blog\/wp-json\/wp\/v2\/categories?post=27"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.visophyte.org\/blog\/wp-json\/wp\/v2\/tags?post=27"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}