This changes the add_custom_libcxx macro to resemble the
llvm_ExternalProject_Add. The primary motivation is to avoid
unnecessary libFuzzer rebuilds that are being done on every
Ninja/Make invocation. The libc++ should be only rebuilt whenever
the libc++ source itself changes.
Differential Revision: https://reviews.llvm.org/D43213
llvm-svn: 326921
Summary:
A few changes related to logging:
- prepend `Scudo` to the error messages so that users can identify that we
reported an error;
- replace a couple of `Report` calls in the RSS check code with
`dieWithMessage`/`Print`, mark a condition as `UNLIKELY` in the process;
- change some messages so that they all look more or less the same. This
includes the `CHECK` message;
- adapt a couple of tests with the new strings.
A couple of side notes: this results in a few 1-line-blocks, for which I left
brackets. There doesn't seem to be any style guide for that, I can remove them
if need be. I didn't use `SanitizerToolName` in the strings, but directly
`Scudo` because we are the only users, I could change that too.
Reviewers: alekseyshl, flowerhack
Reviewed By: alekseyshl
Subscribers: mgorny, delcypher, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D44171
llvm-svn: 326901
Darwin needs xlocale.h but I see no precedence in the code how non-Posix
headers like this are handled and I am not experienced with this code. Just
disable the tests for now to recover the bots.
rdar://38208146
llvm-svn: 326874
Summary:
This change adds APIs to allow logging implementations to provide a
function for iterating through in-memory buffers (if they hold in-memory
buffers) and a way for users to generically deal with these buffers
in-process. These APIs are:
- __xray_log_set_buffer_iterator(...) and
__xray_log_remove_buffer_iterator(): installs and removes an
iterator function that takes an XRayBuffer and yields the next one.
- __xray_log_process_buffers(...): takes a function pointer that can
take a mode identifier (string) and an XRayBuffer to process this
data as they see fit.
The intent is to have the FDR mode implementation's buffers be
available through this `__xray_log_process_buffers(...)` API, so that
they can be streamed from memory instead of flushed to disk (useful for
getting the data to a network, or doing in-process analysis).
Basic mode logging will not support this mechanism as it's designed to
write the data mostly to disk.
Future implementations will may depend on this API as well, to allow for
programmatically working through the XRay buffers exposed to the
users in some fashion.
Reviewers: eizan, kpw, pelikan
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D43495
llvm-svn: 326866
Summary:
Enabling the memory sanitizer support for FreeBSD, most of unit tests are compatible.
- Adding fstat and stressor_r interceptors.
- Updating the struct link_map access since most likely the struct Obj_Entry had been updated since.
- Disabling few unit tests until further work is needed (or we can assume it can work in real world code).
Patch by: David CARLIER
Reviewers: vitalybuka, krytarowski
Reviewed By: vitalybuka
Subscribers: eugenis, dim, srhines, emaste, kubamracek, mgorny, fedor.sergeev, hintonda, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43080
llvm-svn: 326644
Programs without any code in them should export the exact same set of
symbols as programs with code, at least on Darwin. This is done to make
text-based API verification possible for certain Darwin frameworks.
llvm-svn: 326351
Update min deployment target in some tests so that they don't try
to link against libarclite and don't fail when it's not available.
rdar://problem/29253617
Reviewers: vsk, kubamracek
Reviewed By: vsk
Subscribers: jkorous-apple, cfe-commits
Differential Revision: https://reviews.llvm.org/D43787
llvm-svn: 326143
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
Summary:
Print current stack on CHECK violation to aid debugging and
match other sanitizers functionality.
Reviewers: eugenis
Subscribers: delcypher, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43692
llvm-svn: 326105
Summary:
Start making the Scudo tests less Linux-y:
- `malloc_usable_size` doesn't exist everywhere, so replace them with
`__sanitizer_get_allocated_size` which we provide;
- move all the `memalign` related tests into `memalign.c` since it's also not
available everywhere.
I also noticed that the `memalign.c` was missing a line in one of the loops.
Reviewers: alekseyshl
Reviewed By: alekseyshl
Subscribers: delcypher, #sanitizers, llvm-commits
Differential Revision: https://reviews.llvm.org/D43393
llvm-svn: 326100
Summary:
The setlocale(3) function reloads the ctype(3) arrays from
external files. This happens behind the scenes in the internals
of libc (citrus library, runes functions etc).
ctype(3) functions like isspace(3) can be provided with two
variations on NetBSD: inlined or via a global symbol in libc:
```
#if defined(_NETBSD_SOURCE) && !defined(_CTYPE_NOINLINE) && \
!defined(__cplusplus)
#include <sys/ctype_inline.h>
#else
#include <sys/ctype_bits.h>
#endif
```
The in-lined versions are de-facto array lookup operations.
```
#define isspace(c) ((int)((_ctype_tab_ + 1)[(c)] & _CTYPE_S))
```
After setting setlocale(3) the ctype(3) arrays (_ctype_tab_,
_toupper_tab_, _tolower_tab_) are reload behind the scenes
and they are required to be marked as initialized.
Set them initialized inside the common setlocale(3) interceptor.
The arrays are of size of 257 elements: 0..255 + 1 (EOF).
This corrects errors on NetBSD/amd64 in applications
prebuilt with MSan.
Sponsored by <The NetBSD Foundation>
Reviewers: vitalybuka, dvyukov, joerg
Reviewed By: vitalybuka
Subscribers: llvm-commits, kubamracek, #sanitizers
Tags: #sanitizers
Differential Revision: https://reviews.llvm.org/D42020
llvm-svn: 326008
Reported on a buildbot:
Error in XFAIL list:
couldn't parse text: '| arm || aarch64 || mips'
in expression: 'freebsd | arm || aarch64 || mips'
Add || in the place of |
Fallout from D43382
llvm-svn: 325751
Summary:
The Unix subdirectory mostly allows only on Linux x86_64 but now we can target x86_64 arch in general.
Patch by David CARLIER
Reviewers: krytarowski, dberris, emaste
Reviewed By: krytarowski, dberris, emaste
Subscribers: emaste, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43382
llvm-svn: 325743
Summary:
Child thread may finish before pthread_setname_np() and/or
pthread_getname_np() had a chance to run, which causes these functions
to fail with ENOENT (meaning /proc/self/task/[tid]/comm doesn't exist).
Fix by stalling child thread on a mutex.
Reviewers: eugenis
Reviewed By: eugenis
Subscribers: llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43548
llvm-svn: 325703
The original change broke a llvm-clang-lld-x86_64-debian setup.
This change will be investigated and reintroduced in future.
Original commit:
"Add Xray instrumentation support to FreeBSD"
https://reviews.llvm.org/D43278
llvm-svn: 325309
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
Summary:
- Enabling the build.
- Using assembly for the cpuid parts.
- Using thr_self FreeBSD call to get the thread id
Patch by: David CARLIER
Reviewers: dberris, rnk, krytarowski
Reviewed By: dberris, krytarowski
Subscribers: emaste, stevecheckoway, nglevin, srhines, kubamracek, dberris, mgorny, krytarowski, llvm-commits, #sanitizers
Differential Revision: https://reviews.llvm.org/D43278
llvm-svn: 325240
textdomain is a part of -lintl on BSDs. In GLIBC it's in libc.
We assume that -lintl will need to be rebuilt with sanitizers
in order to sanitize programs using its features.
This is a proper continuation of D41013.
The original patch has been reverted (adding -lintl).
llvm-svn: 324810
The test expects to see the pattern "load add store" twice
in a row.
However the test contains actually several instances of this pattern.
Currently the first pattern appears in the output twice.
But after LLVM change https://reviews.llvm.org/D42691 some addtional
modification is done and one of another pattern has been hoisted in
function entry block.
As a result we have another order of meeting this pattern.
The test is updated to meet this change.
llvm-svn: 324571
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
Petr Hosek