I looked into the rocksDB source code but I was unable to find the implementation of the open function for DB.
Ex: rocksdb::DB::Open(options, "/tmp/testdb", &db);
If I get the source or explanation it would be helpful.
The implementation of rocksdb's rocksdb::DB is spread across multiple sources. It is declared in include/rocksdb/db.h, but implemented in multiple files starting with db_impl in db/. The one you are looking for is db_impl_open.cc: https://github.com/facebook/rocksdb/blob/master/db/db_impl_open.cc.
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I'm trying to find a way to extract all tasks dependencies. The idea is to find all SQL tasks (Bigquery) and find all it depending tables so i guess there is sort of a metadata db or another option i could think of is reading the "Render" (render template) code and extract the different entities straight from there but can't find any data source which holds that data.
I'm. trying to find a relevant data source / access which holds that info. Any idea how and where i can find it ?
Thanks
I use an IDE called DrRacket to help to learn scheme.
I read a book named Simply Scheme and I downloaded the package simply-scheme so that I could run examples and do exercises in this book.
This book provides a package named functions.scm, the book instructed me to load it(functions.scm) into the interpreter so I could explore those functions and procedures inside it.
But it seems that I can't use procedures inside the file(functions.scm) after I loaded it.
This is OK when I found I could just open it(functions.scm) in IDE and click run button top right-hand corner.
However, when I kept reading this book, I wrote more and more procedures. And there are more and more times when I want to reuse my procedures defined before.
It becomes a severe problem that I can't use my procedures after loading files into scheme interpreter.
I really don't understand why would this happen. When I add extra parentheses into those files and then I loaded them into Scheme, the interpreter would show error message about unmatched parentheses. This means the interpreter does read the loading files. But why can't I just use the procedures I defined inside it?
I would appreciate it if there is anyone who could explain it and give me a solution to this issue.
According to https://randomascii.wordpress.com/2013/11/04/exporting-arbitrary-data-from-xperf-etl-files/, wpaexporter.exe should be the right tool to do so.
I manage to prepare a profile with the right data, but, unfortunately, wpaexporter keep trying to translate addresses, even if "-symbols" is not given to the command line, generating some useless
/<ModuleName.dll>!<Symbols disabled>
warnings.
This is annoying because part of our application use some Delphi code that can not generate symbols in a Microsoft compatible format. With addresses, we would be able to find the Delphi symbols in the call stack using map files.
Is there a way to extract call stack addresses from a wpr trace ?
Thanks, i completely missed processing options of xperf...
In the meantime, i found that LogParser (https://www.microsoft.com/en-us/download/details.aspx?id=24659) can also export an etl file to a csv (with actual values as well) :
LogParser.exe" "Select * from file.etl" -i:ETW -o:CSV -oTsFormat "HH:mm:ss.ln" > output_file.csv
From what i have seen so far, LogParser output might be more suitable for automatic parsing (only one line per event in the file, no header) while xperf output is more suitable for human processing (tabular representation).
Yes. You can also use xperf.exe. Have you tried the actions option?
xperf -a stack should help here I expect.
You can see detailed info with xperf -help processing command.
first of all, i will explain what i would like to do here : given a C big programm, i would like to output a list of producers/consumers for a data and a list of calling/called-by functions of the function where this data is.
for doing this, i am thinking about using what computes some modules of frama-c, like dataflow.ml or callgraph.ml in my own plugin.
however, as i read the plugin developper doc, i can't manage to see how we can have access to the data of those modules.
is a "open.cyl_type" sufficient here in my own plugin?
moreover, here are my other questions :
i tried using by the way pdg plugin for my purposes but when i call it and it says "pdg graph computed", how can i access it?
is there any more documented thing about "impact" plugin than the official webpage, in depth, how it works fondamentally? (i have to say that i'm in like a pre-project phase, and that i installed frama-c with the apt-get on ubuntu and that i did not get an impact plugin working (i'll see by compiling the sources))
by the way, do you think i'm using the right method to get to my purposes?
Your question is quite unclear, and this answer is thus very generic. As mentioned in the developer documentation, there are two main classes of plugins: static plugins, compiled with the kernel and whose API is exposed in a module (usually of the same name of the plugin) in Db. Dynamic plugins, such as Semantic_callgraph register dynamically their entry points through the Dynamic module.
If you do make doc in Frama-C sources (I'm not sure that there is a corresponding package in Ubuntu) you can access documentation for the Db module in FRAMAC_SOURCE_DIR/doc/code/html/Db.html and the list of functions registered by dynamic plugins in FRAMAC_SOURCE_DIR/doc/code/dynamic_plugins/Dynamic_plugins.html.
I think that, following Virgile's advice, you should get the source code anyway because you will most of the time need to browse the code to find what you are looking for. Beside, you can have a look at the hello_word plug-in (in src/dummy/hello_world) to have an example of a very simple plug-in. You can also find some examples on my web site at https://anne.pacalet.fr/Notes/doku.php?id=notes:0061_frama_c_scripts to find out how to have access to some information in the AST.
I try to set up a web based application using spring and xslt. Since i always use xslt in a pipelining style, i would like to use calabash. Is there a possibility to call calabash from Java? I read thru the documentation on http://xmlcalabash.com but there is only a description how to use it from command line. I also tired to find some javadoc on githup but wasn't successful. Obviously, there is the Main class with the main() method and i could supply the command line parameters as a string array...
I wonder if there is a better way to do it.
I looked into this recently too. I took a pragmatic approach where I call Main.run(), and pass in a string array that I generate from a (File)Properties object. It doesn't allow passing in file inputs as streams or sources however, they must reside on the file-system.
Likely there are nicer ways. You could for instance look into http://expath.org/ . There should be sources of that project. The webapp modules (formerly known as servlex?) seems to provide XMLCalabash integration.
HTH!