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https://github.com/hsjoihs/c-compiler
seccamp2018 c compiler
https://github.com/hsjoihs/c-compiler
Last synced: 3 months ago
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seccamp2018 c compiler
- Host: GitHub
- URL: https://github.com/hsjoihs/c-compiler
- Owner: hsjoihs
- Created: 2018-07-08T07:59:23.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2022-08-11T10:36:53.000Z (over 2 years ago)
- Last Synced: 2024-04-19T19:25:41.351Z (10 months ago)
- Language: C
- Size: 3.12 MB
- Stars: 52
- Watchers: 8
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
- AwesomeCompiler - c-compiler
README
# c-compiler
seccamp2018 c compiler
[日記](https://github.com/hsjoihs/c-compiler/blob/master/misc/diary.md)
In case you are also making a toy C compiler, feel free to use [my test cases](./test_cases.sh) to test yours. I also have [negative test cases](./test_compile_error.sh), a list of inputs to which a C compiler should report an error. [test_cases_that_are_compile_error_only_if_pedantic.sh](./test_cases_that_are_compile_error_only_if_pedantic.sh) contains non-ISO extensions commonly implemented in many C compilers. hsjoihs-c-compiler reports an error with respect to those cases only when `-pedantic` is passed.
## Environment
Tested on macOS (Catalina), Ubuntu (20.04.1 LTS) and Debian (10.5).
## How to run
After cloning, run:
```
$ make
```
to compile.
The compiler can be run as
```
$ cat input.c | ./out/compiler.out -DOSX -DOVERRIDE_STD > s/output.s
```
or as
```
$ ./out/compiler.out -DOSX -DOVERRIDE_STD input.c > s/output.s
```
for macOS; replace `-DOSX` with `-DLINUX` for Ubuntu. Note that, in Ubuntu, the generated assembly requires
`-no-pie` to be passed to gcc in order for the linking to succeed.
To self-compile, run
```
$ make 2ndgen
```
; this will overwrite `./out/compiler.out`.
## How to test
Run
```
$ make test_2ndgen_compiler
```
to test the self-compiled compiler. To test some more, run
```
$ make test_all_
```
## Fun samples
### Conway's game of life
Based on https://gist.github.com/maekawatoshiki/8ea2f392e22698593d7ee8522aabbbd0
```
$ make game_of_life
```
### Calculating digits of pi / e
Based on https://xn--w6q13e505b.jp/program/spigot.html
```
$ make pi
```
```
$ make digits_of_e
```
### Donut
```
$ make donut
```
The following is the source code, which is greatly modified from [the original](https://www.a1k0n.net/2011/07/20/donut-math.html) to avoid floating-point calculations
```c
int putchar();void*
memset();int m(int a,int b)
{return (a*b+5000)/10000;}void a(
int*c,int*s,int d,int t){int k=m(*c,d
)-m(*s,t);int l=m(*s,d)+m(*c,t);*c=k;*s=l
;}int usleep();int printf();int main(){int z[
1760];char b[1760];printf("\e[2J");int s=10000;
int q=s;int r=0;int u=s;int v=0;for(;;a(&q,&r,s-8
,400),a(&u,&v,s-2,200)){memset(b,32,1760);memset(z,
0,7040);int l=0;int p =s;for(int i=0;i<88;i
++,a(&p,&l,9974+i% 2,714)){int w=0;int
e=s;for(int j=0;j< 314;j++,a(&e,&w,s-
2,200)){int f=p+2 *s;int g=s*s/(m(m
(w,f),r)+m(l,q)+5* s);int t=m(m(w,q),
f)-m(l,r);int x=40 +30*m(g,m(m(e,u),f
)-m(t,v))/s;int y =12+15*m(g,m(m(e,
v),f)+m(t,u))/s;int o=x+80*y;int N=8*
(m(m(l,r)-m(m(w,q) ,p),u)-m(m(w,r),p)-
m(l,q)-m(m(e,v),p))/s ;if(y>0&&g>z[o]&&y<22
&&x>0&&80>x){z[o]=g;b[o]=".,-~:;=!*#$@"[N>=1?N:0]+0
;}}}printf("\e[H");for(int k=0;k<1761;k++)putchar
(k%80?b[k]:10);printf("Author: @a1k0n. Rewritt"
"en by @hsjoihs so that it works without flo"
);https://github.com/hsjoihs/c-compiler/
printf("ating types.\nNote that roun"
"ding errors gradually reduce th"
"e donut's size.\n");usleep
(50000);}return 0;}
```