[compiler-rt] [compiler-rt] Fix frame numbering for unparsable frames. (PR #148278)

[Thurston Dang via llvm-commits]

thurstond wrote:

I was able to test your patch manually using the following testcase:
```
WRITE of size 4 at 0x7c18d1be0010 thread T0
    #0 0x0000  (blahblahblah+0x0000)
    #0 0x0000  (blahblahblah+0x0000)
    #0 0x0000  (blahblahblah+0xf0000)
```

```
$ compiler-rt/lib/asan/scripts/asan_symbolize.py < testcase
WRITE of size 4 at 0x7c18d1be0010 thread T0
    #0 0x0000  (blahblahblah+0x0000)
    #0 0x0000  (blahblahblah+0x0000)
    #0 0x0000  (blahblahblah+0xf0000)
```

```
$ /usr/bin/python3 compiler-rt/lib/asan/scripts/asan_symbolize-NEW.py < testcase
WRITE of size 4 at 0x7c18d1be0010 thread T0
    #0 0x0000  (blahblahblah+0x0000)
    #1 0x0000  (blahblahblah+0x0000)
    #2 0x0000  (blahblahblah+0xf0000)
```



https://github.com/llvm/llvm-project/pull/148278