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Verify signature of start lang item #105963

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bjorn3 opened this issue Dec 20, 2022 · 2 comments · Fixed by #106092
Closed

Verify signature of start lang item #105963

bjorn3 opened this issue Dec 20, 2022 · 2 comments · Fixed by #106092
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@asquared31415
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A-cranelift Things relevant to the [future] cranelift backend A-lang-item Area: lang items T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@bjorn3
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bjorn3 commented Dec 20, 2022 •
edited by rustbot
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In https://github.com/bjorn3/rustc_codegen_cranelift/issues/1329 it was found if the signature of the start lang item is wrong, rustc with the LLVM backend will silently compile it despite the ABI mismatch. Cg_clif crashes entirely. To avoid both issues rustc should validate the signature.
@bjorn3 bjorn3 added T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. A-lang-item Area: lang items labels Dec 20, 2022
@bjorn3 bjorn3 mentioned this issue Dec 20, 2022
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@bjorn3 bjorn3 added the A-cranelift Things relevant to the [future] cranelift backend label Dec 20, 2022
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I have attempted to do this in the past (and never ended up finishing it), but I was not aware of the mentioned sigpipe: u8 argument. Where would I find information on that?

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bjorn3 commented Dec 20, 2022

#97802 is the PR that added it.

@asquared31415 asquared31415 mentioned this issue Dec 23, 2022
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compiler-errors added a commit to compiler-errors/rust that referenced this issue Jan 9, 2023
@compiler-errors
Rollup merge of rust-lang#106092 - asquared31415:start_lang_item_chec…
66729cc 
…ks, r=davidtwco

Add checks for the signature of the `start` lang item

Closes rust-lang#105963
@bors bors closed this as completed in 4a04f25 Jan 13, 2023
flip1995 pushed a commit to flip1995/rust that referenced this issue Jan 27, 2023
@bors
Auto merge of rust-lang#106092 - asquared31415:start_lang_item_checks…
83dba6e 
…, r=davidtwco

Add checks for the signature of the `start` lang item

Closes rust-lang#105963
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A-cranelift Things relevant to the [future] cranelift backend A-lang-item Area: lang items T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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Add checks for the signature of the start lang item asquared31415/rust
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