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Migrate readdir_r from pointers to places

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This commit is contained in:
David Cook 2020-02-24 19:38:17 -06:00
parent 9fcc8a2a91
commit 9e03b41338
1 changed files with 6 additions and 10 deletions
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16
src/shims/fs.rs
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@ -902,13 +902,11 @@ fn linux_readdir64_r(
// pub d_name: [c_char; 256],
// }
let entry_ptr = this.force_ptr(this.read_scalar(entry_op)?.not_undef()?)?;
let dirent64_layout = this.libc_ty_layout("dirent64")?;
let name_offset = dirent64_layout.details.fields.offset(4);
let name_ptr = entry_ptr.offset(name_offset, this)?;
let entry_place = this.deref_operand(entry_op)?;
let name_place = this.mplace_field(entry_place, 4)?;
let file_name = dir_entry.file_name();
let name_fits = this.write_os_str_to_c_str(&file_name, Scalar::Ptr(name_ptr), 256)?;
let name_fits = this.write_os_str_to_c_str(&file_name, name_place.ptr, name_place.layout.size.bytes())?;
if !name_fits {
throw_unsup_format!("A directory entry had a name too large to fit in libc::dirent64");
}
@ -988,13 +986,11 @@ fn macos_readdir_r(
// pub d_name: [c_char; 1024],
// }
let entry_ptr = this.force_ptr(this.read_scalar(entry_op)?.not_undef()?)?;
let dirent_layout = this.libc_ty_layout("dirent")?;
let name_offset = dirent_layout.details.fields.offset(5);
let name_ptr = entry_ptr.offset(name_offset, this)?;
let entry_place = this.deref_operand(entry_op)?;
let name_place = this.mplace_field(entry_place, 5)?;
let file_name = dir_entry.file_name();
let name_fits = this.write_os_str_to_c_str(&file_name, Scalar::Ptr(name_ptr), 1024)?;
let name_fits = this.write_os_str_to_c_str(&file_name, name_place.ptr, name_place.layout.size.bytes())?;
if !name_fits {
throw_unsup_format!("A directory entry had a name too large to fit in libc::dirent");
}