<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/86644>86644</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Default llvm-size output format berkeley (but also darwin) is useless on macOS
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          therealprof
      </td>
    </tr>
</table>

<pre>
    I'm really amazed that no-one that I couldn't find any complaints about this, especially since the LLVM toolchain is used by default on macOS.

When using `llvm-size` on macOS, it uses the `berkeley` format which renders something like:
```
__TEXT  __DATA  __OBJC  others  dec     hex
10289152        32768   0       4296048640      4306370560      100ae0000
```
with absurdly large `total` sizes, which are of course not true.

Switching to darwin format, it immediately becomes clear what the issue is:
```
Segment __PAGEZERO: 4294967296
Segment __TEXT: 10289152
        Section __text: 7112552
        Section __stubs: 1596
        Section __gcc_except_tab: 429400
        Section __const: 1418776
        Section __unwind_info: 197152
        Section __eh_frame: 1111852
        total 10271328
Segment __DATA_CONST: 704512
        Section __got: 1080
        Section __const: 696352
        total 697432
Segment __DATA: 32768
        Section __data: 15232
        Section __thread_vars: 960
        Section __thread_data: 112
        Section __thread_bss: 1456
        Section __common: 8872
        Section __bss: 592
        total 27224
Segment __LINKEDIT: 376832
total 4306370560
```

The huge `PAGEZERO` segment (which of course is all virtual) is added to the file size, rendering the output of `llvm-size` almost completely useless.

The only format yielding a useful and correct result is `sysv`
```
section                 size addr
__text               7112552   4294984960
__stubs 1596   4302097512
__gcc_except_tab      429400   4302099108
__const 1418776   4302528512
__unwind_info         197152 4303947288
__eh_frame           1111852   4304144440
__got 1080   4305256448
__const               696352   4305257528
__data 15232   4305960960
__thread_vars            960 4305976192
__thread_data            112   4305977152
__thread_bss 1456   4305977264
__common                8872   4305978752
__bss 592   4305987624
Total 10995984
```
... which is not great.
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJx8ll9v2zYXxj8NfUPUoCiKEi98kTbJi7zrmmEJtmE3AiUdW1wp0iCpuO6nH0jJsuO6MwLHth495w_5O5T0Xu0MwAYVH1Fxv5Jj6K3bhB4cSL13drtqbHfcPCFaDjj-po9YDvI7dDj0MmBjP1gD0-cn3NpRdwbRMuCtMh2W5ohbO-y1VCZ4LBs7Bhx65RH9hMHvoVXJ0SvTRhPAnz__8SsO1uq2l8pg5fHoocPNEXewlaMO2Bo8yPb5ZY3IPSJ30_ufPRg8emV2GHGi9dvwwavvgDhZ9DGkCtHOp0iIkwbcV9BwjLKtdYMM-NCrtscOTAfOY28HCH101eoroHyOhjiZ_9LXun59-OsVEVHX93evd-nD88f_f0JE2NhJj4jooEVE9PBtuiUjtBJZQREROS15hYggiAhGBSes4ix9yQnPS1LEMCIjRAIhhNzM4KBCj2XjR9fpI9bS7VJ9wQapY3GxF6nnU3nSAbbbuFrOAzY24OBGeNfQl4MKbao8WNxJd1BmbtHcRzUM0CkZQB9xA60dwONWg3T4EPdC7LDyfozvP-vbC-wGMAHX9W93_3v4--H3Z5TfYUYFE7ykgl-rUpfzO3xu3pSveIE2KGtwXQf4FqKkzDJa3FT4MDY-uRSnCO-u79q2hm8t7EMdZHNKaOn7pbS1xqdoGcuqsrzlNpqDMl2tzNYmoShv5w19vXVygCTKsqy6UKVVjEWXWU6r66bEHVd_ev7yklpTElZktwLs7JQpqf6zEi54_kNoLkqW01uB4y3z_v3Bs5NBTn2m-c2l6h3Irn6TLi2H4LcSm0WL183aZlHjp3Vlxa2VaO0wWBMFVVXecplvL8R1-bSklF1X__npyy8P90-p6XnJq1OJ0y2X6N7Y-NP7aw-4HydSFwAirHMQRKsJ1zOqymOpNX5TLoxSIyrSL10Xp7FNzG2VhoR7xHQaYwniHrAdw34M0e16REo9WB-mSQ2J6NGDBu_X1_lao4-nUXlUoLtoLqN8O2osTYdb6xy0ATvwcVorH6P5o39DP2mGn1fg-hWTi7W505CNbF9pZswxnqZGxcR5JifQE-Xxck4oEeXCxjXnk91E-iIXGalO8kTICfRZUdDqwvAC9SW_ifcozgUrabXYnXi_qGXGfvJmGWOMLbXsbEjoThcLWnDGrlJ7_5o4XuRlQRd5ZGmCcr4sOLlo2wWWl4aCk0lc8kzQK3GyfFfK4l2eB94lqInSs4Zydq4mcnq9GSKzi7wqz5bRqxDLtarkJ1Zf57EpRCEqdnPrrdfr-URUPh2DOwcyrFfdJu9ELuQKNlmZxaWgFVn1GyKE2DZNl3VbyVrIMyJznlV51mTAWl6u1IYSykhOORFZRsm63bKikSA4lTltSooYgUEqvY78ra3brdIhuak4Z2ylZQPap2cxSg0cphMUURofzdwmMduMO48Y0coHf3YJKmjY3M-PSAvcJ-ZnYk_PO3G0NGPAUvvT4T7Pkpn75aFpNTq96UPYp0OcPiL6uFOhH5t1awdEH2Ok-d-HvbP_QBsQfUxpe0QfU1n_BgAA__9QpQEY">