This sanitizer checks for overaligned reads and writes,
or put another way, use of underaligned pointers.
This usually happens when you cast, e.g. char* to int*
without checking that the char* is 4-byte aligned. Each
of the changes under src/ fixes something just like that.
The unusual setup for tools/xsan.blacklist is there to
force a rebuild whenever tools/xsan.blacklist changes.
I spent a good few minutes debugging rebuilds not happening
this morning, perhaps from some strange ccache interaction.
Align SkTextBlobs as void* (today they're just 4-byte) so the
SkTextBlob::RunRecords we put after them in SkTextBlobBuilder
buffers are properly aligned (for the SkTypeface* inside).
There's no obvious error in void SkRRect::computeType(),
but one bot seems to have seen some sort of issue with
SK_AT_SCOPE_EXIT(SkASSERT(this->isValid()));
I can't reproduce it locally, so I'm just going to unroll it.
Change-Id: I904d94f65f695e1b626b684c32216a4930b72b0c
Reviewed-on: https://skia-review.googlesource.com/146104
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Reed <reed@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
Bug: skia:
Change-Id: I97bf83ca001acc762a42d26207a394faee6d90fb
Reviewed-on: https://skia-review.googlesource.com/107782
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Attempt to take over all *SAN builds.
MSAN has a lot of coordination required between gn/BUILD.gn and gn_flavor.py.
I'd like to follow up to move more of this into gn/BUILD.gn, to make it easier
to use locally.
The compile steps should be much faster now. We no longer build CMake
and Clang for every run, instead using the clang_linux CIPD package. This
removes the need for all the third_party/externals/llvm/... dependencies.
Similarly, since we're using the clang_linux package, we no longer depend
on Chrome's Clang, and thus no longer need to sync chromium on these bots.
Instead of packaging up MSAN libraries and llvm-symbolizer in the compile
output, I have the test / perf bots also depend on the clang_linux package.
These do not vary from build to build.
No more need for the xsan.blacklist -include hack: Clang, GN, and Ninja
all track changes to xsan.blacklist without our help.
This has the incidental effect of upgrading the compiler used by *SAN
bots from Clang 3.8 to Clang 3.9.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2289343002
Review-Url: https://codereview.chromium.org/2289343002
We think this might be more flexible. It allows, e.g, function-level blacklisting,
and here an easy one-stop-shop blacklist for all of third_party/externals.
BUG=skia:
CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-ASAN-Trybot
NOTREECHECKS=true
Review URL: https://codereview.chromium.org/1509733003
