How to analyze native crash through GDB

use GDB Online debugging , Qualcomm's official tutorial for APPS,Native process Use as follows ：

 

  Download and compile the crash utility

1. Download redhat crash-utility and get the introduction from
https://people.redhat.com/anderson/
2. Extract and copy all crash-utility files at
<crash-utility path>
3. Build crash-utility with 
make target=<ARM/ARM64>
4. Download gcore from
https://people.redhat.com/anderson/extensions.html
5. Extract and copy all gcore files at
<crash-utility path>/extensions/
6. Build gcore with
make extensions

 The following files are at the location:
 crash at <crash-uitily path> 
 gcore.so at <crash