<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/88761>88761</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            __xray_log_select_mode typo and deserialize tool
        </td>
    </tr>

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

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

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

<pre>
    1. Apparently, this is a typo in [xray_profiling.cpp](https://github.com/llvm/llvm-project/blob/4e85e1ffcaf161736e27a24c291c1177be865976/compiler-rt/lib/xray/xray_profiling.cpp#L512)
which causing a bug, and xray-profiling mode is won't initilized correctly. 
<img width="651" alt="Screen Shot 2024-04-15 at 9 22 39 AM" src="https://github.com/llvm/llvm-project/assets/79297823/740b4b45-8671-4083-8aaa-ddf23e0f68e1">

to reproduce, just run: 
`XRAY_OPTIONS="patch_premain=true xray_mode=xray-profiling ./sample`

2. other xray_mode, such as xray-basic, will also call
`__xray_log_init_mode` automatically, but [xray_profiling.cpp](https://github.com/llvm/llvm-project/blob/4e85e1ffcaf161736e27a24c291c1177be865976/compiler-rt/lib/xray/xray_profiling.cpp#L512) doesn't. I'm not sure if this is intentional or just a minor miss.  but it is not consistent compare with other mode, which will cause confuse. 
to overcome this, I had to call `__xray_log_init_mode`  in my main function. 

```c
extern "C" {
extern int __xray_log_init_mode(const char *Mode, const char *Config);
}
int main() {
  if ( // xray_mode is xray-profiling) {
     __xray_log_init_mode("xray-profiling", "");
 }
}
```

3.  with those fix, I can generate the profiling output file, but  seems current llvm/tools/llvm-xray is not able to decode the profiling output. I'm not sure is there any branch support it/developing on going. or I need write my own. thanks.
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzUVc2O4zYTfBr60rAgNSVLPvjgHX8GBvg2G2RzSE4GRbUsbmhSIKn1Ok8ftDSev2wC7DHAYPRjVbO6q4pUMZqzI9qJ6oOoDis1pcGH3W1yw6SsWbW-u-2KDPbjqAK5ZG8CHyANJoKJoCDdRg_Ggag-fAvqdhqD74017pzpcRTVQWAzpDRGIfcCjwKPZ5OGqc20vwg8Wvv1flmPwX8hnQQeW-tbgceSmoqKvteqLzZFLTeEtcJS47bQRVHXLTWbaltvBB61v4zGUlgHxlvDcKbzdHnHCuX_qwIFbkV-EPn-Ohg9gFZTNO4MCtrpzD0q1wGD189guPiOuO2rdwLrBMaZZKz5kzrQPgTSyd4yWKoK-WAuZ7iaLg1CHgTipioEIiiblufPOhA5-Dz4BJhjuc7LdVGBSrAFRJBb2H9kQAx6AfzwIFWMlKLAY73Fbd2g5Nsyb8u2rNbNpi7WZd7IdaOUWnddj5LyftMQ0xTyf099zP-Th0Bj8N2kiYfzZYoJwuSE3N_73eS__bL__fTp518fP_30eWE8qqSH0xjooowT8pDCRPNQTzxKIQ_vBpwJPEZ1GS2JTf56fczAp4HCKzA-QJz0ACouMrUqGs1vr8ZaUDZ60MraZ3an04y1_nxi3ZYimxzUlPxFJcMfz-Zup_TftDN0nuLszAweBdYXcD5BnAKB6Z8za1wil4x3yoIPi5IKLsb5ABcTYwbzBEzij7mA9i6ayCBgYioQXE0angS5a7GkaJ49R4kY1k-R7nlIHvxXCtpfaKbCmEcYVAdpEQr-RSPeYS43YBdBPznN9J-Ddhd4-dPLM31LFBwIxAfOkKg_vHlvXILvLoYNt5tADyqAwP3Hp_bevn3wrjdn3kHkU11RH5Ybrjy7HRuW5HlhYA0ENrD45sXIPOa3MXiHA_gnqgLxPRKZ7HzB1_Tgmd_LzX1ir8coM1jETYOPBL35tuiklYMzOQoqsXwEL5n1UxqnBL2xdE8PRKJLBD0FPjLgKRbJexvv8WDed4Op1hK7oCPN8_he-b8bOvJ3gUC5G7RBOT1AnMbRB7auwGNHX8n6cS7h4Ow5Lez3R3BEHVyDScSe8leXQRqU-yNmq24nu63cqhXtirqQmKMsi9Ww043c0kZjg6Sxr8q63jZt0-lKVmXVtWpldryD52VRFbVEzDOFfdlVspClbGVZoihz3gRtxt1nPpxXJsaJdk1Tb4qVVS3ZOJ_BiI6uMP_IGlaHVdjNE2uncxRlbk1M8aVKMsnS7pU_IlnSi0OWw5nPsY4iBaP4qAKWYTUFu_vhjWwmxQrOpP8KAAD__yjLoCQ">