In struct_info.compiled.json, the "stat" struct is declared like so:
"stat":{
"st_rdev":28,
"st_mtim":{
"tv_sec":56,
"tv_nsec":60,
"__size__":8
},
"st_blocks":44,
"st_atim":{
"tv_sec":48,
"tv_nsec":52,
"__size__":8
},
"st_nlink":16,
"__st_ino_truncated":8,
"st_ctim": {
"tv_sec":64,
"tv_nsec":68,
"__size__":8
},
"st_mode":12,
"st_blksize":40,
"__st_dev_padding":4,
"st_dev":0,
"st_size":36,
"st_gid":24,
"__st_rdev_padding":32,
"st_uid":20,
"st_ino":72,
"__size__":76
}
I assume the properties are the bit widths of the various fields (?).
According to this, st_size is 36 bits, which is enough to cater even for
very large files.
Can you please confirm, Alon?
On Saturday, March 3, 2018 at 6:18:09 PM UTC+10, Soeren Balko wrote:
>
> Thanks, Alon! This does indeed seem to be the issue. In
> library_syscall.js, the "st_size" member is considered am i32 (see below).
> I do not yet fully understand how C_STRUCTS is generated. I can see that
> compiler.js receives a JSON object STRUCT_INFO that contains the type
> definitions. Is this generated from the musl headers?
>
> doStat: function(func, path, buf) {
> try {
> var stat = func(path);
> } catch (e) {
> if (e && e.node && PATH.normalize(path) !== PATH.normalize(FS.getPath(e.
> node))) {
> // an error occurred while trying to look up the path; we should just
> report ENOTDIR
> return -ERRNO_CODES.ENOTDIR;
> }
> throw e;
> }
> {{{ makeSetValue('buf', C_STRUCTS.stat.st_dev, 'stat.dev', 'i32') }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.__st_dev_padding, '0', 'i32') }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.__st_ino_truncated, 'stat.ino', '
> i32') }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.st_mode, 'stat.mode', 'i32') }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.st_nlink, 'stat.nlink', 'i32') }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.st_uid, 'stat.uid', 'i32') }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.st_gid, 'stat.gid', 'i32') }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.st_rdev, 'stat.rdev', 'i32') }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.__st_rdev_padding, '0', 'i32') }}};
> *{{{ makeSetValue('buf', C_STRUCTS.stat.st_size, 'stat.size', 'i32') }}};*
> {{{ makeSetValue('buf', C_STRUCTS.stat.st_blksize, '4096', 'i32') }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.st_blocks, 'stat.blocks', 'i32')
> }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.st_atim.tv_sec, '(stat.atime.getTime()
> / 1000)|0', 'i32') }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.st_atim.tv_nsec, '0', 'i32') }}};
> {{{ makeSetValue('buf', C_STRUCTS.stat.st_mtim.tv_sec, '(stat.mtime.getTime()
> / 1000)|0', 'i32') }}};
> <td id="LC61" class="blob-code blob-code-inner js-file-line"
> style="text-align: left; box-sizing: border-box; padding-right: 10px;
> padding-lef
>
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