1523588 - Display the register contents in the first frame in AArch64 Windows crashes

Status: RESOLVED FIXED

(Toolkit :: Crash Reporting, defect)

Description

[Gabriele Svelto [:gsvelto] (PTO)]

The contents of all the registers are displayed in the first frame of the crashed thread when looking at a crash's "Raw dump" tab on Socorro. On Windows/AArch64 this isn't the case. Since I'm not sure if it's a problem with Breakpad or Socorro I'm filing it here for now.

Comment 1

[(not currently active) Ted Mielczarek]

There's code to support this, but perhaps it's broken due to Microsoft using a different context type for their AArch64 minidumps?
https://github.com/mozilla-services/socorro/blob/7ae773805a59076dea64c9c4bb112d0c458a291a/minidump-stackwalk/stackwalker.cc#L388

c.f.:
https://chromium.googlesource.com/breakpad/breakpad/+/88d8114fda3e4a7292654bd6ac0c34d6c88a8121

Comment 2

[Gabriele Svelto [:gsvelto] (PTO)]

(In reply to Ted Mielczarek [:ted] [:ted.mielczarek] from comment #1)

There's code to support this, but perhaps it's broken due to Microsoft using a different context type for their AArch64 minidumps?
https://github.com/mozilla-services/socorro/blob/7ae773805a59076dea64c9c4bb112d0c458a291a/minidump-stackwalk/stackwalker.cc#L388

Thanks for the pointer. That code isn't being run because the cpu name is not "arm64" but "0x000c". This is fixed by bug 1519845, I just tested it locally. If you can review that and bug 1509805 we can then pull from upstream breakpad again and squash all these bugs in one go.

Comment 3

[Gabriele Svelto [:gsvelto] (PTO)]

The patches landed upstream and have been imported into Socorro. This is looking good, see this crash report with the register contents being properly shown in the first stack frame (raw dump tab): https://crash-stats.mozilla.com/report/index/f4242326-88e7-4f7d-981a-518c30190131