If the pointer passed to the getVtablePrefix function was read from a freed
object, we may end up following pointers into objects on the heap and
printing bogus dynamic type names in diagnostics. However, we know that
vtable pointers will generally only point into memory mapped from object
files, not objects on the heap.
This change causes us to only follow pointers in a vtable if the vtable
and one of the virtual functions it points to appear to have appropriate
permissions (i.e. non-writable, and maybe executable), which will generally
exclude heap pointers.
Only enabled for Linux; this hasn't been tested on FreeBSD, and vtables are
writable on Mac (PR24782) so this won't work there.
Differential Revision: http://reviews.llvm.org/D12790
llvm-svn: 247484
This patch adds a runtime check for asan, dfsan, msan, and tsan for
architectures that support multiple VMA size (like aarch64). Currently
the check only prints a warning indicating which is the VMA built and
expected against the one detected at runtime.
llvm-svn: 247413
In some cases, PHDR table is allocated with malloc() by the linker
instead of being mapped from file. It needs to be unpoisoned in the
dl_iterate_phdr callback then.
This happens when program headers are not part of any loadable ELF
segment.
llvm-svn: 247100
Instead, assume we're going to target triple specified by
COMPILER_RT_DEFAULT_TARGET_TRIPLE and build runtimes for this triple
(and hope that the host compiler can target them).
This will help users that use cross-compiler on their host to build
Clang that would work on a different architecture. This will also come in
handy if one would want to configure several compiler-rt build trees on
the same host, using just-built Clang that can target many
architectures.
This doesn't change the behavior in the default build configuration.
llvm-svn: 247099
Summary:
When destructor for a class is not declared, no destructor
is emitted, and members are not poisoned. Test case exhibits this
current bug in use-after-dtor implementation (detailed in
https://github.com/google/sanitizers/issues/596).
Reviewers: eugenis, kcc
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12617
Rename test files.
llvm-svn: 247091
On recent OS X systems, blocks used as callbacks for XPC events (set up e.g. via xpc_connection_set_event_handler) are not later executed via the public libdispatch API (dispatch_async, etc). Because we don't intercept the path where the block is executed, we can fail to register the newly created dispatch thread. To fix that, let's intercept libxpc's APIs that take a block as a callback handler, and let's wrap these blocks in the same way as we do for libdispatch API.
Differential Revision: http://reviews.llvm.org/D12490
llvm-svn: 246961
Tests need to be run either via asanwrapper or asanwrapper64
depending in the binary bitness. This matters when testing on an
aarch64 device.
llvm-svn: 246891
The failure is caused by the missing implementation of array cookie
poisoning in Clang for ARMCXXABI and has nothing to do with Android
(and the test passes on Android/x86).
llvm-svn: 246832
Due to a slightly different initialization order, syslog on
android/x86 calls vsnprintf, which can not be handled until interceptors
are initialized at least.
llvm-svn: 246831
Summary: Verify that all members are poisoned.
Reviewers: eugenis, kcc
Differential Revision: http://reviews.llvm.org/D12023
Test virtual functions and virtual bases poisoning proper size.
Runtime testing of destroying diamond inheritance.
Explicit testing for 0 optimizations.
Simplify test to only test interesting values.
Test poisoning on multiple inheritance with nontrivial and trivial members.
Removed unnecessary header.
Testing (anonymous/)bit fields.
Revised object instantiation in test to avoid undefined behavior.
llvm-svn: 246817
Race deduplication code proved to be a performance bottleneck in the past if suppressions/annotations are used, or just some races left unaddressed. And we still get user complaints about this:
https://groups.google.com/forum/#!topic/thread-sanitizer/hB0WyiTI4e4
ReportRace already has several layers of caching for racy pcs/addresses to make deduplication faster. However, ReportRace still takes a global mutex (ThreadRegistry and ReportMutex) during deduplication and also calls mmap/munmap (which take process-wide semaphore in kernel), this makes deduplication non-scalable.
This patch moves race deduplication outside of global mutexes and also removes all mmap/munmap calls.
As the result, race_stress.cc with 100 threads and 10000 iterations become 30x faster:
before:
real 0m21.673s
user 0m5.932s
sys 0m34.885s
after:
real 0m0.720s
user 0m23.646s
sys 0m1.254s
http://reviews.llvm.org/D12554
llvm-svn: 246758
All supported version of Android provide both "signal" and
"bsd_signal" libc exports. Binaries built for API level <21 call
bsd_signal; newer binaries call signal.
Simply intercept both.
Fixes AddressSanitizer.SignalTest on Android/x86.
llvm-svn: 246716
Summary:
I broke building the builtins with r245967. This fixes them on Linux and builds them properly for Darwin.
The old code could not be made to work on Darwin as a result of the refactoring of add_compiler_rt_runtime, so I had to rework the way they are built for Darwin. This solution is not ideal and will be fixed in subsequent commits. I just want to get this in so everything is working again.
Reviewers: samsonov, chh, compnerd, bogner
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12500
llvm-svn: 246487
According to `man freopen`, passing NULL instead of a filename is valid, however the current implementation of the interceptor assumes this parameter is non-NULL. Let's fix that and add a test case.
Differential Revision: http://reviews.llvm.org/D11389
llvm-svn: 246435
This patch adds support for tsan on aarch64-linux with 42-bit VMA
(current default config for 64K pagesize kernels). The support is
enabled by defining the SANITIZER_AARCH64_VMA to 42 at build time
for both clang/llvm and compiler-rt. The default VMA is 39 bits.
It also enabled tsan for previous supported VMA (39).
llvm-svn: 246330
Summary:
Teach all sanitizers to call abort() instead of _exit() after printing
an error report, if requested. This behavior is the default on Mac OS.
Reviewers: kcc, kubabrecka
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12332
llvm-svn: 246205
Summary:
This is another step in a multi-step refactoring to move add_sanitizer_rt_symbols in the direction of other add_* functions in compiler-rt.
Changes to CMakeLists files are all minimal except ubsan which tests the new ARCHS loop.
Further cleanup patches will follow.
Reviewers: filcab, bogner, kubabrecka, zaks.anna, glider, samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12410
llvm-svn: 246199
Summary: This is another step in a multi-step refactoring to move add_sanitizer_rt_symbols in the direction of other add_* functions in compiler-rt.
Reviewers: filcab, bogner, kubabrecka, zaks.anna, glider, samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12409
llvm-svn: 246178
This patch fix the function GetTls for aarch64, where it assumes it
follows the x86_64 way where the TLS initial address is at the end
of TLS. Instead aarch64 set the TLS address as the thread pointer.
llvm-svn: 246148
Summary: This is the first step in a multi-step refactoring to move add_sanitizer_rt_symbols in the direction of other add_* functions in compiler-rt.
Reviewers: filcab, bogner, kubabrecka, zaks.anna, glider, samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12386
llvm-svn: 246102
This follows the approach we use in ASan and UBSan lit tests to setup
tool options in a portable way, and to provide a nice way to specify
testsuite-wide defaults.
llvm-svn: 246058
Summary: This is one more step to allow us to eliminate platform-specific code from the library CMakeLists files. Subsequent patches will refactor all call sites to use this and other new features.
Reviewers: filcab, bogner, kubabrecka, zaks.anna, glider, samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12339
llvm-svn: 246047
Summary: Currently there is a libc++ test failing under MSAN because wcrtomb is not intercepted. This patch adds an interceptor for it.
Reviewers: samsonov, eugenis
Subscribers: tberghammer, danalbert, srhines, llvm-commits
Differential Revision: http://reviews.llvm.org/D12311
llvm-svn: 245994
Summary: This refactoring moves much of the Apple-specific behavior into a function in AddCompilerRT. The next cleanup patch will remove more of the if(APPLE) checks in the outlying CMakeLists.
This patch adds a bunch of new functionality to add_compiler_rt_runtime so that the target names don't need to be reconstructed outside the call. It also updates some of the call sites to exercise the new functionality, but does not update all uses fully. Subsequent patches will further update call sites and move to using the new features.
Reviewers: filcab, bogner, kubabrecka, zaks.anna, glider, samsonov
Subscribers: beanz, rengolin, llvm-commits
Differential Revision: http://reviews.llvm.org/D12292
llvm-svn: 245970
Introduce %env_ubsan_opts= substitution instead of specifying
UBSAN_OPTIONS manually in the RUN-lines. This will come in handy
once we introduce some default UBSAN_OPTIONS for the whole testsuite
(for instance, make abort_on_error common option).
llvm-svn: 245967
Previously we had to call __sanitizer_cov_dump() from tool-specific
callbacks - instead, let sanitizer_common library handle this in a
single place.
This is a re-application of r245770, with slightly different approach
taken.
llvm-svn: 245890
This is required to properly re-apply r245770:
1) We should be able to dump coverage in __sanitizer::Die() if coverage
collection is turned on.
2) We don't want to explicitly do this in every single
sanitizer that supports it.
3) We don't want to link in coverage (and therefore symbolization) bits
into small sanitizers that don't support it (safestack).
The solution is to make InitializeCoverage() register its own Die()
callback that would call __sanitizer_cov_dump(). This callback should be
executed in addition to another tool-specific die callbacks (if there
are any).
llvm-svn: 245889
This patch adds support for dfsan on aarch64-linux with 42-bit VMA
(current default config for 64K pagesize kernels). The support is
enabled by defining the SANITIZER_AARCH64_VMA to 42 at build time
for both clang/llvm and compiler-rt. The default VMA is 39 bits.
llvm-svn: 245841
These changes break both autoconf Mac OS X buildbot (linker errors
due to wrong Makefiles) and CMake buildbot (safestack test failures).
llvm-svn: 245784
Previously we had to call __sanitizer_cov_dump() from tool-specific
callbacks - instead, let sanitizer_common library handle this in a single place.
llvm-svn: 245770
Summary:
Merge "exitcode" flag from ASan, LSan, TSan and "exit_code" from MSan
into one entity. Additionally, make sure sanitizer_common now uses the
value of common_flags()->exitcode when dying on error, so that this
flag will automatically work for other sanitizers (UBSan and DFSan) as
well.
User-visible changes:
* "exit_code" MSan runtime flag is now deprecated. If explicitly
specified, this flag will take precedence over "exitcode".
The users are encouraged to migrate to the new version.
* __asan_set_error_exit_code() and __msan_set_exit_code() functions
are removed. With few exceptions, we don't support changing runtime
flags during program execution - we can't make them thread-safe.
The users should use __sanitizer_set_death_callback()
that would call _exit() with proper exit code instead.
* Plugin tools (LSan and UBSan) now inherit the exit code of the parent
tool. In particular, this means that ASan would now crash the program
with exit code "1" instead of "23" if it detects leaks.
Reviewers: kcc, eugenis
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12120
llvm-svn: 245734
MachO and COFF do not support aliases. Restrict the alias to ELF targets. This
should also fix the Darwin build. Make the FNALIAS usage an error on non-ELF
targets.
llvm-svn: 245669
This patch adds support for asan on aarch64-linux with 42-bit VMA
(current default config for 64K pagesize kernels). The support is
enabled by defining the SANITIZER_AARCH64_VMA to 42 at build time
for both clang/llvm and compiler-rt. The default VMA is 39 bits.
For 42-bit VMA aarch64 uses SANITIZIER_CAN_USER_ALLOCATOR64.
llvm-svn: 245596
Summary:
There are a number of issues with unit tests on Darwin. These patches address the following:
* Unit tests should be passed -arch (-m32/-m64 isn't sufficient)
* Unit tests should be passed ${DARWIN_osx_CFLAGS} because they're being built for OS X
* Test architectures should be filtered based on base system capabilities (i.e. don't try running x86_64h tests on pre-haswell hardware).
Reviewers: bogner, filcab, kubabrecka
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12174
llvm-svn: 245580
ASan uses GetProcAddress to get the address of malloc so it can patch
it. Newer versions of Windows make GetProcAddress initialize the DLL
before returning a function pointer into it. That's perfectly
reasonable, but ASan needs to finish patching malloc before CRT
initialization. So now we roll our own GetProcAddress.
Fixes PR24237
Based on a patch by David Major
Originally written by David Major as part of:
https://hg.mozilla.org/mozilla-central/file/tip/toolkit/xre/WindowsCrtPatch.h
llvm-svn: 245377
Summary: This patch consolidates add_compiler_rt_osx_static_runtime and add_compiler_rt_darwin_dynamic_runtime into a single new function add_compiler_rt_darwin_runtime.
Reviewers: filcab, samsonov, bogner
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D12106
llvm-svn: 245317
Summary:
Currently CMake doesn't build builtins for AArch64 and if one does this anyway
it's likely that at least `__multc3`, `__floatditf` and `__floatunditf` will be
missing. There is actually more builtins to add, but these come from
different libc implementations, thus providing them makes compiler-rt for
AArch64 good enough at least for basic usage.
Builtins implementation were originally taken from FreeBSD project:
* [[ https://reviews.freebsd.org/D2173 | __multc3 ]]
* [[ https://reviews.freebsd.org/D2174 | __floatditf and __floatunditf ]]
Until they have been tested to find mistakes in `__float*` functions.
`__floatditf` was based on `__floatsitf`, which had the same mistakes
(fixed it in r243746).
Version of the builtins in this patch are fixed and complemented with basic
tests. Additionally they were tested via GCC's torture (this is what revealed
these issues).
P.S. Ed (author of FreeBSD patches) asked for feedback on the list some time ago (here [[ http://lists.cs.uiuc.edu/pipermail/llvmdev/2015-March/084064.html | here ]])
and got no response, but it seems to be worth adding these builtins as is and
extracting common part later.
Reviewers: howard.hinnant, t.p.northover, jmolloy, enefaim, rengolin, zatrazz
Subscribers: asl, emaste, samsonov, aemerson, llvm-commits, rengolin
Differential Revision: http://reviews.llvm.org/D11679
llvm-svn: 245296
This reverts commit r245263, and the change wasn't catched by UBsan.
It also reverts: "[ARM] Also disable stable-runtime check on UBsan,
to use generic one" (r245287), as it didn't fix the UBsan builds.
We need to investigate what's going on before continuing, since this
is breaking all ARM RT buildbots for a while.
llvm-svn: 245292
Summary:
This involved various fixes:
- Move a test that uses ulimit to Posix.
- Add a few "REQUIRES: shell" lines to tests using backtick subshell
evaluation.
- The MSVC CRT buffers stdio if the output is a pipe by default. Some
tests need that disabled to avoid interleaving test stdio with asan
output.
- MSVC headers provide _alloca instead of alloca (go figure), so add a
portability macro to the two alloca tests.
- XFAIL tests that rely on accurate symbols, we need to pass more flags
to make that work.
- MSVC's printf implementation of %p uses upper case letters and doesn't
add 0x, so do that manually.
- Accept "SEGV" or "access-violation" reports in crash tests.
Reviewers: samsonov
Subscribers: tberghammer, danalbert, llvm-commits, srhines
Differential Revision: http://reviews.llvm.org/D12019
llvm-svn: 245073
Summary: Fixed test in response to buildbot failures from last night.
Reviewers: eugenis, kcc
Differential Revision: http://reviews.llvm.org/D12018
llvm-svn: 244952
Summary:
This is a reunification of three separate reviews D11073, D11082, D11083.
Having them separate was not constructive even though the patches were smaller because it led to fragmented conversations, and this is really all about one change.
This patch incorporates feedback from samsonov, and refactors the hacky darwin code out of the root CMakeLists.txt and int config-ix.cmake.
Reviewers: zaks.anna, bogner, kubabrecka, chandlerc, samsonov
Subscribers: jevinskie, filcab, llvm-commits
Differential Revision: http://reviews.llvm.org/D11820
llvm-svn: 244948
Summary:
Let UBSan output flag description if 'help' options is provided.
Report unrecognized flags if verbosity mode is turned on.
Patch by Svetlana Ryabkova!
Differential Revision: http://reviews.llvm.org/D11903
llvm-svn: 244946
Summary:
Printing a stacktrace acquires a spinlock, and the sanitizer spinlocks
aren't re-entrant. Avoid the problem by reusing the logic we already
have on Posix.
This failure mode is already exercised by the existing mmap_limit_mb.cc
test case. It will be enabled in a forthcoming change, so I didn't add
standalone tests for this change.
Reviewers: samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D11999
llvm-svn: 244840
Summary:
The lit internal shell is used by default on Windows, and it does not
support bash variable expansion. Because bash variable expansion
interacts with tokenization, it is prohibitively difficult to make the
existing lit shell do general shell variable expansion.
The most common use of shell variables in the asan tests is to add
options to the default set of options set by lit.cfg. We can avoid the
need for variable expansion with a substitution that expands to 'env
ASAN_OPTIONS=<defaults:>'.
This has the side benefit of shortening the RUN lines, so it seemed
better than implementing limited variable expansion in lit.
Reviewers: samsonov, filcab
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D11982
llvm-svn: 244839
Summary:
This is consistent with LLVM and Clang. The lit shell isn't a complete
bash implementation, but its behavior is more easily reproducible. This
fixes some ubsan test failures.
One ubsan test requires a shell currently, so I added "REQUIRES: shell",
and the other doesn't work on Windows because it prints a stack trace
and uses a linker that doesn't support DWARF. We can fix it eventually
through other means.
Reviewers: samsonov, pcc
Subscribers: yaron.keren, filcab, llvm-commits
Differential Revision: http://reviews.llvm.org/D11960
llvm-svn: 244837
Summary: Fixed test in response to buildbot failures from last night.
Reviewers: eugenis, kcc
Differential Revision: http://reviews.llvm.org/D11992
llvm-svn: 244818
Summary: New implementation for dtor sanitizer callback poisons only class members, and emits poisoning callback before base dtor invoked.
Reviewers: eugenis, kcc
Differential Revision: http://reviews.llvm.org/D11952
Explicit dtor invocation
llvm-svn: 244709
Summary:
llvm-symbolizer understands both PDBs and DWARF, so it's a better bet if
it's available. It prints out the function parameter types and column
numbers, so I needed to churn the expected test output a bit.
This makes most of the llvm-symbolizer subprocessing code
target-independent. Pipes on all platforms use fd_t, and we can use the
portable ReadFromFile / WriteToFile wrappers in symbolizer_sanitizer.cc.
Only the pipe creation and process spawning is Windows-specific.
Please check that the libcdep layering is still correct. I don't know
how to reproduce the build configuration that relies on that.
Reviewers: samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D11791
llvm-svn: 244616
Summary:
Compiler-rt part of http://reviews.llvm.org/D11757
I ended up making UBSan work with both the old version and the new
version of the float_cast_overflow data (instead of just erroring with
the previous version). The old version will try to symbolize its caller.
Now we compile the float_cast_overflow tests without -g, and make sure
we have the source file+line+column.
If you think I'm trying too hard to make sure we can still use both
versions, let me know.
Reviewers: samsonov, rsmith
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D11793
llvm-svn: 244567
We will use this for ASan on Windows soon. When the ELF port of LLD
matures, we can add other sanitizer integration tests to make sure they
work with LLD.
llvm-svn: 244549
Summary: These are needed to talk to llvm-symbolizer on Windows.
Reviewers: samsonov
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D11920
llvm-svn: 244533
Summary:
A virtual base class and derived class should only poison their
respective members upon destruction. In particular, trivial members should
be poisoned directly, non-trivial members should be poisoned by their
respective destructors, and references to non-trivial members should be
poisoned.
Reviewers: eugenis, kcc
Differential Revision: http://reviews.llvm.org/D11912
Test case avoids casting to access members
Run configurations to reflect expected runtime failure on assertions.
Simplified access to internal members.
Updated internal member structure of base.
Revised assert in main to verify successful poisoning after dtor.
Verify address of pointer is poisoned.
Fixed assert err.
Cleaned up test by removing extraneous prints, asserts.
llvm-svn: 244521
Summary: I've copy/pasted the LLVM_NOEXCEPT definition macro goo from LLVM's Compiler.h. Is there somewhere I should put this in Compiler RT? Is there a useful header to define/share things like this?
Reviewers: samsonov
Differential Revision: http://reviews.llvm.org/D11780
llvm-svn: 244453
The number of unaccessible pages at the beginning of the address
space can differ between processes on the same machine. Try different
values at runtime to protect as much memory as possible.
llvm-svn: 244364
This test was in an infinite loop in AArch64. We're investigating it
on PR24389, but I'm disabling it for now, so that we continue testing
everything else.
llvm-svn: 244316
Offset from vptr to the start of most-derived object can actually
be positive in some virtual base class vtables.
Patch by Stephan Bergmann!
llvm-svn: 244101
Peter Collingbourne