| commit | ce32e39015f5ee091e1a7e24a7ae951fef5507eb | [log] [tgz] |
|---|---|---|
| author | Leonard Chan <leonardchan@fuchsia.infra.roller.google.com> | Wed Dec 07 20:15:28 2022 +0000 |
| committer | Copybara-Service <copybara-worker@google.com> | Wed Dec 07 12:16:58 2022 -0800 |
| tree | 553c38def9939b5822561f607cc35dfe59ff12ed | |
| parent | 5753c09eba6f6ffe545014724f4a69c2f67dc898 [diff] |
[roll] Roll fuchsia [libc] Test globals for dynamically loaded libs are registered correctly
The dynamic loader is required to call __hwasan_library_loaded from the
hwasan runtime whenever a dso is loaded in order to register global tags
into shadow memory. This is done explicitly in the loader (via
__sanitizer_library_loaded) rather than
via a function call that accepts a list of globals that is called in
.init_array to resolve an order of initialization problem. With
constructors we can encounter the following problematic scenario:
1) library A depends on library B and also interposes one of B's symbols
2) B's constructors are called before A's (as required for correctness)
3) during construction, B accesses one of its "own" globals (actually
interposed by A) and triggers a HWASAN failure due to the initialization
for A not having happened yet
This adds tests for asserting various situations in which globals can be
accessed via module constructors work correctly without crashing with
hwasan.
Original-Bug: 57112
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/724143
Original-Revision: f4f76f22d6517653bf16507707cb77db616756e7
GitOrigin-RevId: b20230a5b776f6d56185a8ebc3675316f806c5cf
Change-Id: Ic83ab1c76a3267b7159d93a261f63435b2bec2bb
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