commit 6d61c62f7bec7bb6c6d90d131d3f0100d4767fd9
author Alex Gough <ajgo@chromium.org> Wed Jul 13 01:35:42 2022
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Wed Jul 13 01:35:42 2022
tree 9e772ad31a6fa14a5cc17a730b28626541499136
parent a9b5a83ac8d9aedc739818dae8dede25901d2219

Register chrome_wer.dll with reference to chrome_elf.dll

- Adds chrome crashpad client interface to find helper module.
- Adds call to crashpad client to get wer context.
- Registers chrome_wer.dll with WER for Windows versions where this
will surface new exceptions (20h1+).

We currently find the location of the module by finding the path
for chrome_elf.dll and appending the WER module name. This means that we
do not need to check for the presence of the WER module on disc early
in startup - in fact we do not need to load the module at all as
we are simply providing a path that WerFault.exe might use later if
our process crashes and does not handle the crash itself.

We register with WER as soon as the connection to the crashpad handler
has been established. In processes other than the browser process this
happens during chrome_elf.dll's DllMain().

We limit registration to Windows 20h1+ as WerFault previously
would not load the module for these crashes, but now does.

The DLL is not yet distributed (is not in the installer) and is not
registered (with a registry entry) so following an unhandled crash
WerFault will look in the registry for the matching key but will not
find anything, and will handle fail-fast crashes itself as before.

See  WerRegisterExceptionHelperModule[0] for more information.

[0] https://docs.microsoft.com/en-us/windows/win32/api/werapi/nf-werapi-werregisterruntimeexceptionmodule

Bug: 865632
Change-Id: I66ae8cbf6aafc7edaceee8d36f5b12b4c9ba225a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3679799
Reviewed-by: Mark Seaborn <mseaborn@chromium.org>
Commit-Queue: Alex Gough <ajgo@chromium.org>
Reviewed-by: Greg Thompson <grt@chromium.org>
Reviewed-by: Will Harris <wfh@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1023528}