[ISSUE] Chromium CFI

[ISSUE] Chromium CFI

[anon-lestat]

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New issue by anon-lestat on void-packages repository

https://github.com/void-linux/void-packages/issues/33579

Description:
Chromium on void linux has broken CFI with LLVM 12.0.1.

As illustrated by its template starting with line 225:
# segfaults with llvm-12.0.1
		'is_cfi=false'
		'use_thin_lto=false'
		'use_cfi_icall=false'
		'chrome_pgo_phase=0'

Even if it cant be compiled as of now, fixing it would be extremely beneficial for users who self-compile, because CFI is a very significant and important feature.

Re: Chromium CFI

[q66]

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New comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/issues/33579#issuecomment-944773750

Comment:
if it's not an actual build option, it's not supported

Re: [ISSUE] [CLOSED] Chromium CFI

[q66]

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Closed issue by anon-lestat on void-packages repository

https://github.com/void-linux/void-packages/issues/33579

Description:
Chromium on void linux has broken CFI with LLVM 12.0.1.

As illustrated by its template starting with line 225:
# segfaults with llvm-12.0.1
		'is_cfi=false'
		'use_thin_lto=false'
		'use_cfi_icall=false'
		'chrome_pgo_phase=0'

Even if it cant be compiled as of now, fixing it would be extremely beneficial for users who self-compile, because CFI is a very significant and important feature.

Re: Chromium CFI

[anon-lestat]

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New comment by anon-lestat on void-packages repository

https://github.com/void-linux/void-packages/issues/33579#issuecomment-944884709

Comment:
@q66 wdym its not an actual build option? Its supposed to be there but LLVM is breaking it.

Re: Chromium CFI

[q66]

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New comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/issues/33579#issuecomment-944976808

Comment:
it's not an xbps-src build option (maybe learn about those before talking shit behind my back on discord), so we don't support it, we don't and can't support random combos that users might patch in and we are also not responsible for compiler crashes that arise from unsupported configurations

Re: Chromium CFI

[anon-lestat]

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New comment by anon-lestat on void-packages repository

https://github.com/void-linux/void-packages/issues/33579#issuecomment-944979413

Comment:
@q66 okay so. I wasnt talking shit haha, i called u a bastard sure and im sorry if you took it the wrong way but i didnt mean it to be insulting. CFI comes with chromium [link](https://www.chromium.org/developers/testing/control-flow-integrity).

U can see them being disabled in chromium template line 225 because atm llvm breaks it. 

chromium template starting line 225:
segfaults with llvm-12.0.1
	'is_cfi=false'
	'use_thin_lto=false'
	'use_cfi_icall=false'
	'chrome_pgo_phase=0'

Re: Chromium CFI

[anon-lestat]

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New comment by anon-lestat on void-packages repository

https://github.com/void-linux/void-packages/issues/33579#issuecomment-944982861

Comment:
https://github.com/archlinux/svntogit-packages/commit/bfe890af9382031a5ea33e7552385952cd0f8077

arch for example

Re: Chromium CFI

[q66]

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New comment by q66 on void-packages repository

https://github.com/void-linux/void-packages/issues/33579#issuecomment-944983688

Comment:
it's disabled because it's broken, and supported on exactly 1 architecture and 1 compiler, and requires the whole thing to be built with LTO, and additionally you're using a libc officially unsupported by chromium

so, this is a wontfix from our side

Re: Chromium CFI

[Vaelatern]

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New comment by anon-lestat on void-packages repository

https://github.com/void-linux/void-packages/issues/33579#issuecomment-944979413

Comment:
@q66 okay so. I wasnt talking shit haha, i called u a bastard sure and im sorry if you took it the wrong way but i didnt mean it to be insulting. CFI comes with chromium [link](https://www.chromium.org/developers/testing/control-flow-integrity).

U can see them being disabled in chromium template line 225 because atm llvm breaks it. 

chromium template starting line 225:
```
segfaults with llvm-12.0.1
	'is_cfi=false'
	'use_thin_lto=false'
	'use_cfi_icall=false'
	'chrome_pgo_phase=0'
```