Show HN: Online C/C++ to assembly visualizer [Weekend Project] • Hacker News Board

Re: Show HN: Online C/C++ to assembly visualizer [Weekend Project]

#31

Post by xymostech » Sun, Sep 23, 2012, 1:05 PM UTC

daurnimator wrote: post #28

Error: Command failed: /bin/sh: 1: c-preload/compiler-wrapper: Permission denied

I'm getting this too.

Re: Show HN: Online C/C++ to assembly visualizer [Weekend Project]

#32

Post by ynh » Sun, Sep 23, 2012, 1:15 PM UTC

gtklocker wrote: post #30

Error: Command failed: /tmp/test969394043.c:1:0: fatal error: can’t open /root/assembler/ccMEBJ3B.s for writing: Permission denied compilation terminated. The bug is not reproducible, so it is likely a hardware or OS problem. Really.

Just fixed

Re: Show HN: Online C/C++ to assembly visualizer [Weekend Project]

#33

Post by jrajav » Sun, Sep 23, 2012, 1:19 PM UTC

Silently fails if you make a syntax error. I accidentally pasted this without newlines and at first I thought it wasn't responding:

  #include int main() { printf("Hello World"); }

Re: Show HN: Online C/C++ to assembly visualizer [Weekend Project]

#34

Post by ynh » Sun, Sep 23, 2012, 1:24 PM UTC

xymostech wrote: post #31

daurnimator wrote: post #28

Error: Command failed: /bin/sh: 1: c-preload/compiler-wrapper: Permission denied

I'm getting this too.

Fixed

Re: Show HN: Online C/C++ to assembly visualizer [Weekend Project]

#35

Post by wulczer » Sun, Sep 23, 2012, 2:48 PM UTC

dzorz wrote: post #23

ynh wrote: post #16

Earlier quoted context omitted.

I have now fixed it. But I think there must be an other way to make it safe. Maybe a sandbox

This is part of your /etc/shadow file: root:censored We can still read /etc/ssh/ssh_host_rsa_key, etc. Edit: removed hash, sorry

Well one easy way to increase security would for this to stop running as root.

Please, don't ever run your application code as root. Less so when it's facing the Internet.

Re: Show HN: Online C/C++ to assembly visualizer [Weekend Project]

#36

Post by b3b0p » Sun, Sep 23, 2012, 3:50 PM UTC

I love it!

My only suggestion right now is to have it so you can have the assembly on the left or right side. Maybe it's just me, but my focus seems to be on the left side more than the right.

Since this is a focused on assembly it seems, wouldn't you want the focus on the assembly, not the C? It could be different for different people though.

Re: Show HN: Online C/C++ to assembly visualizer [Weekend Project]

#37

Post by munin » Sun, Sep 23, 2012, 3:56 PM UTC

LLVM has a similar page: http://llvm.org/demo

you can compile C/C++ to LLVM IR and also 32 or 64 bit intel assembler. you can also see the effects of different optimizations, etc

Re: Show HN: Online C/C++ to assembly visualizer [Weekend Project]

#38

Post by oo » Sun, Sep 23, 2012, 4:13 PM UTC

Just tried this code:

    #include __FILE__

:-D

Re: Show HN: Online C/C++ to assembly visualizer [Weekend Project]

#39

Post by akavi » Sun, Sep 23, 2012, 4:31 PM UTC

Does anyone have a link to a good beginner's guide explaining the output?

Re: Show HN: Online C/C++ to assembly visualizer [Weekend Project]

#40

Post by Aardwolf » Sun, Sep 23, 2012, 4:47 PM UTC

In the hello world example, no matter what text you put there, the assembly is the same. Where does the string content go?