Error while building Chromium with CFI option

[Priyam Biswas]

Hi,
I was trying to build chromium with the cfi option:

gn gen out/Default '--args=clang_base_path="/path/to/build/" clang_use_chrome_plugins=false treat_warnings_as_errors=false enable_nacl=false is_debug=false is_clang=true is_cfi=true use_cfi_cast=true use_thin_lto=true' --check

However, getting this following error:

"Clang: error: malformed sanitizer blacklist: 'error parsing file '../../tools/cfi/blacklist.txt': malformed line 1: '[cfi-unrelated-cast|cfi-derived-cast]''

Any help would be appreciated.

[Peter Collingbourne]

Hi Priyam,

It looks like you are using an older revision of Clang that does not support the new blacklist format that we use. If you upgrade to at least the revision mentioned in tools/clang/scripts/update.py (or just use the prebuilt Clang binaries by removing the clang_base_path argument), that should help.

Peter

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[Priyam Biswas]

Hi Peter,
I think you're right. That is the reason behind the error. Thank you very much. I really appreciate your help.

Best 

P

[Priyam Biswas]

Hi Peter,

Thanks for your suggestion. I resolved that issue. However, I am now getting another error while trying to build chromium with an llvm sanitizer. I would appreciate if you can kindly tell me the reason behind the error.

FAILED: gen/net/http/transport_security_state_static.h 

python ../../build/gn_run_binary.py transport_security_state_generator ../../net/http/transport_security_state_static.json ../../net/http/transport_security_state_static.pins ../../net/http/transport_security_state_static.template gen/net/http/transport_security_state_static.h

Best Regards

Priyam

On Wednesday, January 10, 2018 at 1:55:39 PM UTC-5, Peter Collingbourne wrote:

[Peter Collingbourne]

Assuming that this is CFI, if you're using a custom build of Clang it's possible that your LLVM build tree does not have a copy of the cfi_blacklist.txt file (its absence would cause a number of binaries to fail like that). To copy it into place you can try building the cfi_blackilst target in LLVM, cleaning your Chromium build tree and rebuilding.

If it's another sanitizer, then I have no idea.



Peter

To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/chromium-dev/52c53e27-558c-46ef-a5f8-2074f23c8448%40chromium.org.

[Priyam Biswas]

Hi Peter,

Thank you so much for the quick response. With cfi and my modified clang, it was built successfully. I was trying with a simple sanitizer written by me. The error doesn't give enough information to dig more.

However, thank you very much :)

Best Regards

Priyam