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Check if the pointer is null/string is not utf8

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This commit is contained in:
Andrew Sun 2021-01-08 11:50:21 -05:00
parent bc4c5bac40
commit 80ca198212
1 changed files with 16 additions and 5 deletions
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21
compiler/rustc_codegen_llvm/src/llvm_util.rs
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@ -228,14 +228,25 @@ pub fn handle_native_features(sess: &Session) -> Vec<String> {
return vec![];
}
let ptr = unsafe { llvm::LLVMGetHostCPUFeatures() };
let str = unsafe { CStr::from_ptr(ptr).to_string_lossy() };
let features_string = unsafe {
let ptr = llvm::LLVMGetHostCPUFeatures();
let features_string = if !ptr.is_null() {
CStr::from_ptr(ptr)
.to_str()
.unwrap_or_else(|e| {
bug!("LLVM returned a non-utf8 features string: {}", e);
})
.to_owned()
} else {
bug!("could not allocate host CPU features, LLVM returned a `null` string");
};
let features = str.split(",").map(|s| s.to_owned()).collect();
llvm::LLVMDisposeMessage(ptr);
unsafe { llvm::LLVMDisposeMessage(ptr) };
features_string
};
features
features_string.split(",").map(|s| s.to_owned()).collect()
}
None => vec![],
}