1365968 - Symbolication of kernelbase.pdb fails on this profile

Status: RESOLVED INCOMPLETE

(Core :: Gecko Profiler, defect)

Description

[(no longer active)]

https://perfht.ml/2pXrBnl

This is on Windows 10 from the reference Acer machine.

Comment 1

[Markus Stange [:mstange]]

"name":"KERNELBASE.dll",
"path":"C:\\Windows\\System32\\KERNELBASE.dll",
"debugName":"kernelbase.pdb",
"breakpadId":"C73C4D048FFE488CB68E3B460636843E1"

We do not have a symbol dump for this file at
http://symbols.mozilla.org/kernelbase.pdb/C73C4D048FFE488CB68E3B460636843E1/kernelbase.sym

Ted, what could be the reason for this? Does Microsoft not publish the pdb file for this library?

Comment 2

[(not currently active) Ted Mielczarek]

philipp asked about this same thing the other day because of the missing symbols in these crash reports:
https://crash-analysis.mozilla.com/release-mgmt/2017-05-15/2017-05-15.firefox.53.explosiveness.html

I've checked the logs for the daily job that fetches missing symbols from Microsoft's symbol server (you can see the list of runs here: https://tools.taskcluster.net/index/#project.socorro.fetch-win32-symbols/project.socorro.fetch-win32-symbols ), and it looks like Microsoft is just missing symbols on their symbol server for a bunch of kernelbase.dll versions:
DEBUG:root:Couldn't fetch kernelbase.pdb/C73C4D048FFE488CB68E3B460636843E1, but not skiplisting

Poking at it via curl shows the same result:
$ curl -LI http://msdl.microsoft.com/download/symbols/kernelbase.pdb/C73C4D048FFE488CB68E3B460636843E1/kernelbase.pd_
HTTP/1.1 404 Not Found
$ curl -LI http://msdl.microsoft.com/download/symbols/kernelbase.pdb/C73C4D048FFE488CB68E3B460636843E1/kernelbase.pdb
HTTP/1.1 404 Not Found

Compared to (from the same log):
DEBUG:root:Successfully downloaded shlwapi.pdb/9315D4F0D4B948509685EB4DF66A122F2
$ curl -LI http://msdl.microsoft.com/download/symbols/shlwapi.pdb/9315D4F0D4B948509685EB4DF66A122F2/shlwapi.pd_
HTTP/1.1 200 OK

If Microsoft doesn't publish the symbols there's nothing we can do. :-(

Comment 3

[Gerald Squelart (he/him) (not at Mozilla since 2022-09-15)]

Old bug, symbolication has been improved a few times since them, so I'll close it. Please reopen/refile if needed.

Comment 4

[Markus Stange [:mstange]]

These URLs all work now, so Microsoft must have published the symbols in the meantime (and our symbol server has picked up the files).

Comment 5

[Markus Stange [:mstange]]

Wow, and our re-symbolication functionality (added two years ago) even works on this five year old profile!