ExtractOffsets.py fails on linux

[laxa]

The ExtractOffsets.py script fails to extract offsets on Linux. No crash happens but every time the offsets are all 0x0. It seems radare2 is crashing on pdb files on multiple version tested, explaining the current behavior, though I am not really sure where the problem is.

[themaks]

Hi Julien, I guess radare2 changed its output and the parsing somehow fails. This would happen less often if we used r2pipe, but it was unfortunately broken on Windows at the time of writing the script. Without any technical info, it’s impossible to say for sure what the problem was, let alone to reproduce the error :) Could you send us additional info, such as:

• the version of radare2 you have ?
• the kernel version number involved in your testing ?
• whether you also tried the script on Windows with the same input file (and if so, with which radare2 version

Cheers

[laxa]

Hello @themaks,

I tried using the radare2 from https://hub.docker.com/r/radare/radare2/ (I needed to patch the extract script with this image as the version parsing fails). I also tried with radare version 5.7.9 (cloned and compiled from master branch). The kernel version is ntoskrnl_17763-3469.exe but when using the -d switch, offsets were also 0x0 for every version. When using Windows, with r2 5.7.8 (officiel release package), offsets were successfully retrieved.

Cheers

[themaks]

Ah, did you see the little warning when launching the script ? WARNING : On Linux systems, radare2 may have trouble to download PDB files. If offsets are reported as 0, export R2_CURL=1 prior to running the script. ?

just run export R2_CURL=1 before running, and you're good to go ;)

(we need to rework the whole script and remove the r2 dependency, not very reliable cross platforms ...)

[laxa]

Hm, just tried again and it worked on the latest build. I mistested by using directly R2 instead of the script, my bad :), thanks for the help.