c-worksheet-instrumentor's Introduction

About Me

I hail from New Zealand.

I studied my undergraduate degree BComp (Hon) at the National University of Singapore, 2011-2015.

I’m currently based in Vietnam.

Repositories

https://github.com/rgoulter/keyboard-labs

I have designed several custom keyboard PCBs, as well as some plates/cases for these.
https://github.com/rgoulter/dotfiles

My dotfiles, using home-manager to link my configuration files. Includes the NixOS modules I use as part of my NixOS configuration.
https://github.com/rgoulter/c-worksheet.vim

Shows the output of simple C programs alongside the code, in a similar manner to Swift Playgrounds or Scala worksheets. This was done as part of my undergraduate dissertation project.
https://github.com/rgoulter/my-hakyll-blog

My configuration of Hakyll, the Haskell static site generator.
https://github.com/rgoulter/cs5237-VoronoiArt

A wee Voronoi Art program, built using C++, Qt 5, OpenCV. This was done for a computational geometry course.
https://github.com/rgoulter/qmk_firmware/tree/add-layout-rgoulter/layouts/community/planck_mit/rgbmatrix-snake

The directory layouts/community/planck_mit/rgbmatrix-snake on the branch add-layout-rgoulter contains a program for playing a “Snake” game on the BM40RGB ortholinear keyboard.

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c-worksheet-instrumentor's Issues

Edge Case: Unable to Instrument Anonymous Struct Expressions

Really minor, but kinda annoying anyway. Doesn't output in the below situation.

One way to work around this is to inject another variable in the declaration (cf. as2).

An alternative way would be to do some memcpy magic, which would probably work. (But makes CTypeToDeclaration be more explicit about its assumptions).

#include <stdio.h>
#include <string.h>

int main(int argc, char** argv) {
    struct { int z; } as = { 9 }, as2;            //> as2 is struct { int z; }
    as.z;                                         //> 9

    // as; // won't instrument

    as2 = as;                                     //> as2 = {.z = 9}
    as2.z;                                        //> 9

    // No actual guarantee memcpy should work here,
    // but I suspect it will on most compilers.
    struct { int z; } az = { 4 };                 //> az is struct { int z; }
    memcpy(&az, &as, sizeof(as));

    az.z;                                         //> 9
}

Issue running on macOS

Running the unzipped tool as it downloaded on OSX yields the error below.

This is kindof annoying. + The tool isn't "robust" in the case where Java throws an exception like that. (i.e. Vim just hangs, which is quite unhelpful).

It seems running code from tmpdir is bad? (n.b. error also occurs from running gradle test, so..).

richardgoulter@r-7-105-25-172  ~/.vim/bundle/c-worksheet.vim/tool/cworksheet-proguard-0.2.4/bin$ ./c-worksheetify ~/hello.c
Exception in thread "main" java.io.IOException: Cannot run program "/var/folders/yt/xblbjsj91g3fh7_mqq0n2rn00000gn/T/cworksheet1178141796752375443.out": error=13, Permission denied
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1041)
    at scala.i.a.o.a(Unknown Source)
    at edu.nus.worksheet.Worksheetify$.a(Unknown Source)
    at edu.nus.worksheet.Worksheetify.main(Unknown Source)
Caused by: java.io.IOException: error=13, Permission denied
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.<init>(UNIXProcess.java:135)
    at java.lang.ProcessImpl.start(ProcessImpl.java:130)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1022)
    ... 3 more

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