r328775) for all platforms.
Given that this is the second occurance of this problem it seemed worth
fixing this problem in a more generic way. r328775 has been reverted and
now a substitution `%linux_static_libstdcplusplus` has been provided.
This substitution expands to Clang driver arguments to use a static
libstdc++ on Linux and on all other platforms it expands to nothing.
The `asan/TestCases/throw_invoke_test.cc` and
`test/tsan/static_init6.cc` test cases now use this substitution.
rdar://problem/39948818
Differential Revision: https://reviews.llvm.org/D46401
llvm-svn: 332254
Otherwise LLD will not align the .ASAN$GA section start, and
&__asan_globals + 1 will not be the start of the next real ASan global
metadata in .ASAN$GL.
We discovered this issue when attempting to use LLD on Windows in
Chromium: https://crbug.com/837090
llvm-svn: 330990
Although sprintf is not intercepted on Windows, this test can pass
if sprintf calls memmove, which is intercepted, so we can't XFAIL it.
Differential Revision: https://reviews.llvm.org/D45894
llvm-svn: 330469
IsStackOverflow only treats accesses within 512 bytes of SP as stack-overflow. This should really be the size of a page instead.
The scariness_score_test.cc triggers stack overflow with frames that are even larger than a page, which can also trigger a fault that will not be recognized as stack-overflow. Let's just use smaller frames.
llvm-svn: 329980
Summary:
Under some circumstances (that I haven't dug further into), the first stack
frame for the test looks like:
`#0 0x4e6038 in __interceptor_memalign.localalias.1 ...compiler-rt/lib/asan/asan_malloc_linux.cc:113`
which isn't matched by the current CHECK.
Expand the CHECK to match aligned_alloc or memalign. Hopefully this should fix
the PowerPC issue as well, otherwise we'll bring back the FIXME.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, kubamracek, delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D45281
llvm-svn: 329226
As many other ASan tests already, has to disable these failing tests on
arm, armhf and aarch64 configs.
Differential Revision: https://reviews.llvm.org/D44404
llvm-svn: 328849
and the general version to avoid use of libstdc++ on non-Linux
platforms.
This is motivated by the fact that using `libstdc++` is deprecated on
Darwin and maybe removed some day.
Differential Revision: https://reviews.llvm.org/D44733
llvm-svn: 328775
This check "CHECK: {{#0 0x.* in .*aligned_alloc}}" fails on ppc64be, gcc
build. Disabling the test for gcc for now.
Differential Revision: https://reviews.llvm.org/D44404
llvm-svn: 328741
Summary:
Currently many allocator specific errors (OOM, for example) are reported as
a text message and CHECK(0) termination, not stack, no details, not too
helpful nor informative. To improve the situation, ASan detailed errors were
defined and reported under the appropriate conditions.
Issue: https://github.com/google/sanitizers/issues/887
Reviewers: eugenis
Subscribers: kubamracek, delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D44404
llvm-svn: 328722
Summary:
vfork is not ASan-friendly because it modifies stack shadow in the
parent process address space. While it is possible to compensate for that with, for example,
__asan_handle_no_return before each call to _exit or execve and friends, simply replacing
vfork with fork looks like by far the easiest solution.
Posix compliant programs can not detect the difference between vfork and fork.
Fixes https://github.com/google/sanitizers/issues/925
Reviewers: kcc, vitalybuka
Subscribers: kubamracek, llvm-commits
Differential Revision: https://reviews.llvm.org/D44587
llvm-svn: 327752
by explicitly listing where we expect this test to work.
Because this test invokes undefined behaviour all sorts of things
can happen (e.g. crash, or on some bots asan manages to catch
something). The test seems to pass okay on Darwin (x86_64/x86_64/i386)
and on Linux (x86_64/i386) so explicitly require one of these platforms
to run the test.
llvm-svn: 327185
This fixes a false positive ODR violation that is reported by ASan when using LTO. In cases, where two constant globals have the same value, LTO will merge them, which breaks ASan's ODR detection. See the included testcase for an example.
Differential Revision: https://reviews.llvm.org/D43959
llvm-svn: 327062
This fixes a false positive ODR violation that is reported by ASan when using LTO. In cases, where two constant globals have the same value, LTO will merge them, which breaks ASan's ODR detection.
Differential Revision: https://reviews.llvm.org/D43959
llvm-svn: 327031
Summary:
Fixes Bug 32434
See https://bugs.llvm.org/show_bug.cgi?id=32434
Short summary:
std::rethrow_exception does not use __cxa_throw to rethrow the exception, so if
it is called from uninstrumented code, it will leave the stack poisoned. This
can lead to false positives.
Long description:
For functions which don't return normally (e.g. via exceptions), asan needs to
unpoison the entire stack. It is not known before a call to such a function
where execution will continue, some function which don't contain cleanup code
like destructors might be skipped. After stack unwinding, execution might
continue in uninstrumented code.
If the stack has been poisoned before such a function is called, but the stack
is unwound during the unconventional return, then zombie redzones (entries) for
no longer existing stack variables can remain in the shadow memory. Normally,
this is avoided by asan generating a call to asan_handle_no_return before all
functions marked as [[noreturn]]. This asan_handle_no_return unpoisons the
entire stack. Since these [[noreturn]] functions can be called from
uninstrumented code, asan also introduces interceptor functions which call
asan_handle_no_return before running the original [[noreturn]] function;
for example, cxa_throw is intercepted.
If a [[noreturn]] function is called from uninstrumented code (so the stack is
left poisoned) and additionally, execution continues in uninstrumented code, new
stack variables might be introduced and overlap with the stack variables
which have been removed during stack unwinding. Since the redzones are not
cleared nor overwritten by uninstrumented code, they remain but now contain
invalid data.
Now, if the redzones are checked against the new stack variables, false
positive reports can occur. This can happen for example by the uninstrumented
code calling an intercepted function such as memcpy, or an instrumented
function.
Intercepting std::rethrow_exception directly is not easily possible since it
depends on the C++ standard library implementation (e.g. libcxx vs libstdc++)
and the mangled name it produces for this function. As a rather simple
workaround, we're intercepting _Unwind_RaiseException for libstdc++. For
libcxxabi, we can intercept the ABI function __cxa_rethrow_primary_exception.
Patch by Robert Schneider.
Reviewers: kcc, eugenis, alekseyshl, vitalybuka
Reviewed By: vitalybuka
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D42644
llvm-svn: 326132
It looks like get_bits_for_arch doesn't recognize "arm64" as a 64-bit architecture, and it actually matches the "arm" regexp, which marks it as 32-bit. Let's fix that by matching the 64-bit list first and addin "arm64" into the list.
Differential Revision: https://reviews.llvm.org/D43155
llvm-svn: 325300
The "sleep(5)" sometimes times out on our bots, causing the test to fail. Let's use pthread_join.
Differential Revision: https://reviews.llvm.org/D42862
llvm-svn: 324126
Summary:
With the change, one can choose not to report comparison (or subtraction)
of a pointer with nullptr pointer.
Reviewers: kcc, jakubjelinek, alekseyshl
Reviewed By: alekseyshl
Subscribers: kubamracek
Differential Revision: https://reviews.llvm.org/D41479
llvm-svn: 323995
In more recent Linux kernels with 47 bit VMAs the layout of virtual memory
for powerpc64 changed causing the address sanitizer to not work properly. This
patch fixes up a test case that was found to fail on some newer Fedora
releases that use different address ranges.
ref: https://reviews.llvm.org/D40907
llvm-svn: 323217
Summary:
One test-case uses a wrong operation (should be subtraction).
Second test-case should declare a global variables before a tested one
in order to guarantee we will find a red-zone.
Reviewers: kcc, jakubjelinek, alekseyshl
Reviewed By: alekseyshl
Subscribers: kubamracek
Differential Revision: https://reviews.llvm.org/D41481
llvm-svn: 323162
sequentially.
The current implementation of commands in
`test/sanitizer_common/ios_commands/` for iOS devices cannot be executed
in parallel which results in the ASan and TSan tests failing when
executed in parallel by lit which was the default behaviour.
We now force the ASan and TSan tests to be a new parallelism group named
`darwin-ios-device-sanitizer` which allows only one test to be run at a
time. We also emit a warning informing the user that tests are being
run sequentially.
This only applies if the target is an iOS device.
Differential Revision: https://reviews.llvm.org/D42156
llvm-svn: 323026
Summary:
This patch (on top of the previous two (https://reviews.llvm.org/D40898 and
https://reviews.llvm.org/D40899) complete the compiler-rt side of the the Solaris
sanitizer port.
It contains the following sets of changes:
* For the time being, the port is for 32-bit x86 only, so reject the various tests on
x86_64.
* When compiling as C++, <setjmp.h> resp. <iso/setjmp_iso.h> only declares
_setjmp and _longjmp inside namespace std.
* MAP_FILE is a Windows feature. While e.g. Linux <sys/mman.h> provides a
no-op compat define, Solaris does not.
* test/asan/TestCases/Posix/coverage.cc was initially failing like this:
/vol/gcc/src/llvm/llvm/local/projects/compiler-rt/lib/sanitizer_common/scripts/sancov.py: 4 files merged; 2 PCs total
rm: cannot remove '/var/gcc/llvm/local/projects/compiler-rt/test/asan/I386SunOSConfig/TestCases/Posix/Output/coverage': Invalid argument
Further digging revealed that the rm was trying to remove the running test's working
directory which failed as observed. cd'ing out of the dir before let the test pass.
* Two tests needed a declaration of alloca. I've now copied the existing code from
test/asan/TestCases/alloca_constant_size.cc, but it may be more profitable and
maintainable to have a common testsuite header where such code is collected.
* Similarly, Solaris' printf %p format doesn't include the leading 0x.
* In test/asan/TestCases/malloc-no-intercept.c, I had to undef __EXTENSIONS__
(predefined by clang for no apparent reason) to avoid conflicting declarations
for memalign.
* test/ubsan/TestCases/Float/cast-overflow.cpp has different platform dependent
ways to define BYTE_ORDER and friends. Why not just use __BYTE_ORDER__ and
friends as predefined by clang and gcc?
Patch by Rainer Orth.
Reviewers: kcc, alekseyshl
Reviewed By: alekseyshl
Subscribers: srhines, kubamracek, mgorny, krytarowski, fedor.sergeev, JDevlieghere, llvm-commits, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D40900
llvm-svn: 322635
Summary:
Export aligned new/delete to make dynamic runtimes work again.
Remove all valid new/delete cases from ASan test, there's a test in
common for that.
Reviewers: eugenis
Subscribers: srhines, kubamracek, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D41548
llvm-svn: 321394
There could be a situation when a specific DSO was built with FORTIFY_SOURCE option. In case asan-ed binary link against that DSO,
libasan can't handle the possible memory error because it does not have interceptors for spinrtf_chk, snprintf_chk, vprintf_chk,
vsnprintf_chk, __fprintf_chk functions. Let's interceptors for them.
Patch by Denis Khalikov.
Differential Revision: https://reviews.llvm.org/D40951
llvm-svn: 320990
In more recent Linux kernels with 47 bit VMAs the layout of virtual memory
for powerpc64 changed causing the address sanitizer to not work properly. This
patch adds support for 47 bit VMA kernels for powerpc64 and fixes up test
cases.
https://reviews.llvm.org/D40908
There is an associated patch for trunk.
Tested on several 4.x and 3.x kernel releases.
llvm-svn: 320110
Following patch adds support of all memory origins in
CheckForInvalidPointerPair function. For small difference of pointers,
it's directly done in shadow memory (the limit was set to 2048B).
Then we search for origin of first pointer and verify that the second
one has the same origin. If so, we verify that it points either to a same
variable (in case of stack memory or a global variable), or to a same
heap segment.
Committing on behanf of marxin and jakubjelinek.
Reviewers: alekseyshl, kcc
Subscribers: llvm-commits
Differential revision: https://reviews.llvm.org/D40600
llvm-svn: 319668
Summary:
As discussed in https://github.com/google/oss-fuzz/issues/933,
it would be really awesome to be able to use ThinLTO for fuzzing.
However, as @kcc has pointed out, it is currently undefined (untested)
whether the sanitizers actually function properly with LLD and/or LTO.
This patch is inspired by the cfi test, which already do test with LTO
(and/or LLD), since LTO is required for CFI to function.
I started with UBSan, because it's cmakelists / lit.* files appeared
to be the cleanest. This patch adds the infrastructure to easily add
LLD and/or LTO sub-variants of the existing lit test configurations.
Also, this patch adds the LLD flavor, that explicitly does use LLD to link.
The check-ubsan does pass on my machine. And to minimize the [initial]
potential buildbot breakage i have put some restrictions on this flavour.
Please review carefully, i have not worked with lit/sanitizer tests before.
The original attempt, r319525 was reverted in r319526 due
to the failures in compiler-rt standalone builds.
Reviewers: eugenis, vitalybuka
Reviewed By: eugenis
Subscribers: #sanitizers, pcc, kubamracek, mgorny, llvm-commits, mehdi_amini, inglorion, kcc
Differential Revision: https://reviews.llvm.org/D39508
llvm-svn: 319575
Kamil Rytarowski