interpose | Automatically generate interposing C wrappers for C APIs | REST library
kandi X-RAY | interpose Summary
kandi X-RAY | interpose Summary
this application will generate the code for interposing (intercepting) library calls based upon a given c header file. for a quick demo, run: $ make demo . in this demo, the files test/interpose_lib_int_args.cpp (the lib file) and test/interpose_usr_int_args.cpp (the usr file) will be generated then compiled into the shared library libinterpose_int_args.so (.dylib on os x). the output should contain something like: 1338250882.859327 [0.000119] extract_int_args() 1338250882.859380 [0.000007] add_int_args() 1338250882.859430 [0.000018] join_int_args() 1338250882.859462 [0.000005] release_int_args() 5 + 456 + 23 + 99 + 0 + -100 = 483 . what’s happening here? all calls to this test library were interposed by our custom library. in this simple example the api calls are timestamped. each timestamped line contains a precise seconds–since–epoc timestamp, the duration of the function call (in seconds), and the name of the function being called. without the interposing library loaded, the application
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- Write the template to the destination
- Generate code for the given template
- Extract a label from a template
- Replace condition in text
- Replaces occurrences in text
- Log a message
- Visit a function node
- Generate a type definition
- Generates names for the given arguments
- Get the name of a node
- Parses a file into a list of functions
interpose Key Features
interpose Examples and Code Snippets
Community Discussions
Trending Discussions on interpose
QUESTION
In clojure, I want to be able to concatenate all the fields(with a separator) in a map for each map in a list.
For the following result I want to be able to get:
...ANSWER
Answered 2022-Mar-31 at 22:36I'm assuming you want to return a string since you talk about a comma as a separator. I further assume that when you say "all the fields" you mean "all the values of each key-value pair", and that each value is a string. In that case, the following gives you what you wanted.
QUESTION
In a VCL Application, I am trying to be notified when I END the horizontal scrolling in a TListView with this interposer class code:
ANSWER
Answered 2022-Feb-13 at 00:06The comments given to the Q are very relevant.
First, as Remy Lebeau stated, the WM_HSCROLL message tells you if the operation is done:
QUESTION
I was manipulation some data and used interpose at the end. But it acted differently when it comes to some letters like , ` ~
Expected behavior
...ANSWER
Answered 2020-Mar-31 at 16:57Those characters all have special meaning in Clojure and you simply can not enter them just with the quote. So they are handled with their meaning by the reader and then your ' quote is used for the next form. This all will lead to code that calls the one-arity version of interpose, which then will give you a transducer, thus resulting in the functions you see as results.
If you want to have those characters as symbols, you can use symbol. E.g.
QUESTION
I have to print out a given matrix in clojure. The goal is to output the matrix in the IO but only have nil as return value.
Here is an example:
...ANSWER
Answered 2020-Mar-06 at 18:35println always returns nil. You can get what you want by using with-out-str as follows:
QUESTION
Well I couldn't find very nice short phrase for my question title, but here is what I mean:
I have a library that interposes some syscalls like open(2).
I use this method for interposing. I add it to DYLD_INSERT_LIBRARIES in order to achieve my goal.
The library that contains the interposing code is a.dylib.
I need to link a library b.dylib to a.dylib because it contains some functions that a.dylib needs.
The issue is a.dylib interposes functions in b.dylib too which I don't want.
I am not an expert with linking. Is there any way to prevent this behaviour and what's the reason behind this happening?
UPDATE:This is how b.dylib is built:
ANSWER
Answered 2020-Feb-20 at 15:38You say a.dylib depends on b.dylib but b.dylib does not depend on a.dylib and that you want no calls in b.dylib to ever be interposed. You gave open as an example of an interposed function.
The example I gave was that a.dylib needs to call processFile that is defined in b.dylib and it opens files. You don't want the open call in b.dylib to be interposed ever (whether a.dylib is loaded or not).
The only way I know to pull this off is for processFile to dynamically load the C library instead of letting ld do it automatically.
There are two problems with this approach. The first is that each function that needs to call open will need one additional if statement to execute the code to resolve the symbol.
The other is that you need to know ahead of time the filename of the C library to load. And if there's a problem resolving the symbol, then you have to deal with a situation that most programs don't have to deal with; at least at a later time.
The code will look something like this:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install interpose
You can use interpose like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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