We need the compiler generated variable to override the weak symbol of
the same name inside the profile runtime, but using LinkOnceODRLinkage
results in weak symbol being emitted which leads to an issue where the
linker might choose either of the weak symbols potentially disabling the
runtime counter relocation.
This change replaces the use of weak definition inside the runtime with
an external weak reference to address the issue. We also place the
compiler generated symbol inside a COMDAT group so dead definition can
be garbage collected by the linker.
Differential Revision: https://reviews.llvm.org/D105176
If we get here from reallocate, BlockEnd is tagged. Then we
will storeTag(UntaggedEnd) into the header of the next chunk.
Luckily header tag is 0 so unpatched code still works.
Reviewed By: pcc
Differential Revision: https://reviews.llvm.org/D105261
It's already covered by multiple tests, but to trigger
this path we need MTE+GWP which disabled.
Reviewed By: hctim, pcc
Differential Revision: https://reviews.llvm.org/D105232
This allows application code checks if origin tracking is on before
printing out traces.
-dfsan-track-origins can be 0,1,2.
The current code only distinguishes 1 and 2 in compile time, but not at runtime.
Made runtime distinguish 1 and 2 too.
Reviewed By: browneee
Differential Revision: https://reviews.llvm.org/D105128
Users can call HwasanThreadList::GetRingBufferSize rather than RingBufferSize
to prevent having to do the calculation in RingBufferSize. This will be useful
for Fuchsia where we plan to initialize the stack ring buffer separately from
the rest of thread initialization.
Differential Revision: https://reviews.llvm.org/D104823
A heap or global buffer that is far away from the faulting address is
unlikely to be the cause, especially if there is a potential
use-after-free as well, so we want to show it after the other
causes.
Reviewed By: eugenis
Differential Revision: https://reviews.llvm.org/D104781
Install libatomic.a in top level library directory so that compiler can find it in search directories.
Reviewed By: jsji
Differential Revision: https://reviews.llvm.org/D104908
I can't be sure of the cause but I believe these fail
due to to fast unwinding not working on Thumb.
Whatever the case, they have been failing on our bots
for a long time:
https://lab.llvm.org/buildbot/#/builders/170/builds/46
Require fast-unwinder-works for both.
Word on the grapevine was that the committee had some discussion that
ended with unanimous agreement on eliminating relational function pointer comparisons.
We wanted to be bold and just ban all of them cold turkey.
But then we chickened out at the last second and are going for
eliminating just the spaceship overload candidate instead, for now.
See D104680 for reference.
This should be fine and "safe", because the only possible semantic change this
would cause is that overload resolution could possibly be ambiguous if
there was another viable candidate equally as good.
But to save face a little we are going to:
* Issue an "error" for three-way comparisons on function pointers.
But all this is doing really is changing one vague error message,
from an "invalid operands to binary expression" into an
"ordered comparison of function pointers", which sounds more like we mean business.
* Otherwise "warn" that comparing function pointers like that is totally
not cool (unless we are told to keep quiet about this).
Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>
Reviewed By: rsmith
Differential Revision: https://reviews.llvm.org/D104892
on arm64e, pointer auth would catch this access violation before asan.
sign the function pointer so pointer auth will ignore this violation and let asan catch it in this test case.
rdar://79652167
Reviewed By: delcypher
Differential Revision: https://reviews.llvm.org/D104828
The comment says it was flaky in 2016,
but it wasn't possible to debug it back then.
Re-enable the test at least on linux/x86_64.
It will either work, or at least we should
see failure output from lit today.
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D104592
Mmap interceptor is not atomic in the sense that it
exposes unmapped shadow for a brief period of time.
This breaks programs that mmap over another mmap
and access the region concurrently.
Don't unmap shadow in the mmap interceptor to fix this.
Just mapping new shadow on top should be enough to zero it.
Reviewed By: vitalybuka
Differential Revision: https://reviews.llvm.org/D104593
Similar to InitOptions in asan, we can use this optional struct for
initializing some members thread objects before they are created. On
linux, this is unused and can remain undefined. On fuchsia, this will
just be the stack bounds.
Differential Revision: https://reviews.llvm.org/D104553
Bionic <malloc.h> may provide the definitions of M_MEMTAG_TUNING_* constants.
Do not redefine them in that case.
Differential Revision: https://reviews.llvm.org/D104758
This reverts commit 21c008d5a5 since
it broke the build on macOS and Windows with the following error:
The install of the clang_rt.<na,e> target requires changing an
RPATH from the build tree, but this is not supported with the Ninja
generator unless on an ELF-based platform. The
CMAKE_BUILD_WITH_INSTALL_RPATH variable may be set to avoid this relinking
step.
We want to disable the use of undefined symbols on Fuchsia, but there
are cases where it might be desirable so may it configurable.
Differential Revision: https://reviews.llvm.org/D104728
This reverts commit ed7086ad46.
This reverts commit b9792638b0.
This breaks cmake with message:
CMake Error at llvm-project/compiler-rt/CMakeLists.txt:449:
Parse error. Expected "(", got newline with text "
We want to disable the use of undefined symbols on Fuchsia, but there
are cases where it might be desirable so may it configurable.
Differential Revision: https://reviews.llvm.org/D104728
These have been broken by https://reviews.llvm.org/D104494.
However, `lib/fuzzer/dataflow/` is unused (?) so addressing this is not a priority.
Added TODOs to re-enable them in the future.
Reviewed By: stephan.yichao.zhao
Differential Revision: https://reviews.llvm.org/D104568
Nico Weber