Summary:
Window compiler is stricter for attributes location. This patch fixes a compilation error.
```
D:\src\llvm\llvm\projects\compiler-rt\lib\lsan\lsan_thread.cc(39): error C2144: syntax error: 'int' should be preceded by ';'
```
Reviewers: rnk, majnemer
Subscribers: majnemer, llvm-commits, chrisha, dberris
Differential Revision: https://reviews.llvm.org/D24810
llvm-svn: 282254
In ShadowToMem we call MemToShadow potentially for incorrect addresses.
So DCHECK(IsAppMem(p)) can fire in debug mode.
Fix this by swapping range and MemToShadow checks.
llvm-svn: 282157
4.1+ Linux kernels map pie binaries at 0x55:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d1fd836dcf00d2028c700c7e44d2c23404062c90
Currently tsan does not support app memory at 0x55 (https://github.com/google/sanitizers/issues/503).
Older kernels also map pie binaries at 0x55 when ASLR is disables (most notably under gdb).
This change extends tsan mapping for linux/x86_64 to cover 0x554-0x568 app range and fixes both 4.1+ kernels and gdb.
This required to slightly shrink low and high app ranges and move heap. The mapping become even more non-linear, since now we xor lower bits. Now even a continuous app range maps to split, intermixed shadow ranges. This breaks ShadowToMemImpl as it assumes linear mapping at least within a continuous app range (however it turned out to be already broken at least on arm64/42-bit vma as uncovered by r281970). So also change ShadowToMemImpl to hopefully a more robust implementation that does not assume a linear mapping.
llvm-svn: 282152
For mips assember '#' is the start of comment. We get assembler error messages if # is used in the struct names. Therefore using '$' which works for all architectures.
Differential: D24335
Reviewed by: zhaoqin
llvm-svn: 282142
Summary:
Finish work on PR30351 (last one, after D24551, D24552, and D24554 land)
Also replace the old ReportData structure/variable with the current_error_ static
member of the ScopedInErrorReport class.
This has the following side-effects:
- Move ASAN_ON_ERROR(); call to the start of the destructor, instead
of in StartReporting().
- We only generate the error structure after the
ScopedInErrorReport constructor finishes, so we can't call
ASAN_ON_ERROR() during the constructor. I think this makes more
sense, since we end up never running two of the ASAN_ON_ERROR()
callback. This also works the same way as error reporting, since
we end up having a lock around it. Otherwise we could end up
with the ASAN_ON_ERROR() call for error 1, then the
ASAN_ON_ERROR() call for error 2, and then lock the mutex for
reporting error 1.
- The __asan_get_report_* functions will be able to, in the future,
provide information about other errors that aren't a "generic
error". But we might want to rethink that API, since it's too
restricted. Ideally we teach lldb about the current_error_ member of
ScopedInErrorReport.
Reviewers: vitalybuka, kcc, eugenis
Subscribers: kubabrecka, llvm-commits
Differential Revision: https://reviews.llvm.org/D24555
llvm-svn: 282107
Summary:
The dynamic shadow code is not detected correctly on Android.
The android shadow seems to start at address zero.
The bug is introduced here:
https://reviews.llvm.org/D23363
Started here: https://build.chromium.org/p/chromium.fyi/builders/ClangToTAndroidASan/builds/4029
Likely due to an asan runtime change, filed https://llvm.org/bugs/show_bug.cgi?id=30462
From asan_mapping.h:
```
#if SANITIZER_WORDSIZE == 32
# if SANITIZER_ANDROID
# define SHADOW_OFFSET (0) <<---- HERE
# elif defined(__mips__)
```
Shadow address on android is 0.
From asan_rtl.c:
```
if (shadow_start == 0) {
[...]
shadow_start = FindAvailableMemoryRange(space_size, alignment, granularity);
}
```
We assumed that 0 is dynamic address.
On windows, the address was determined with:
```
# elif SANITIZER_WINDOWS64
# define SHADOW_OFFSET __asan_shadow_memory_dynamic_address
# else
```
and __asan_shadow_memory_dynamic_address is initially zero.
Reviewers: rnk, eugenis, vitalybuka
Subscribers: kcc, tberghammer, danalbert, kubabrecka, dberris, llvm-commits, chrisha
Differential Revision: https://reviews.llvm.org/D24768
llvm-svn: 282085
Summary:
GetActuallyAllocatedSize() was not accounting for the last page of the mapping
being a guard page, and was returning the wrong number of actually allocated
bytes, which in turn would mess up with the realloc logic. Current tests didn't
find this as the size exercised was only serviced by the Primary.
Correct the issue by subtracting PageSize, and update the realloc test to
exercise paths in both the Primary and the Secondary.
Reviewers: kcc
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D24787
llvm-svn: 282030
Summary:
The Sanitizer Secondary Allocator was not entirely ideal was Scudo for several
reasons: decent amount of unneeded code, redundant checks already performed by
the front end, unneeded data structures, difficulty to properly protect the
secondary chunks header.
Given that the second allocator is pretty straight forward, Scudo will use its
own, trimming all the unneeded code off of the Sanitizer one. A significant
difference in terms of security is that now each secondary chunk is preceded
and followed by a guard page, thus mitigating overflows into and from the
chunk.
A test was added as well to illustrate the overflow & underflow situations
into the guard pages.
Reviewers: kcc
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D24737
llvm-svn: 281938
Summary:
This patch is adding the needed code to compiler-rt to support
dynamic shadow.
This is to support this patch:
https://reviews.llvm.org/D23354
It's adding support for using a shadow placed at a dynamic address determined
at runtime.
The dynamic shadow is required to work on windows 64-bits.
Reviewers: rnk, kcc, vitalybuka
Subscribers: kubabrecka, dberris, llvm-commits, chrisha
Differential Revision: https://reviews.llvm.org/D23363
llvm-svn: 281909
Summary:
This value is already defaulted to true in asan_internal.h.
Allow the value to be overriden in cases where exceptions are unavailable.
Reviewers: kcc, samsonov, compnerd
Subscribers: kubabrecka, dberris, beanz, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D24633
llvm-svn: 281746
The definitions in sanitizer_common may conflict with definitions from system headers because:
The runtime includes the system headers after the project headers (as per LLVM coding guidelines).
lib/sanitizer_common/sanitizer_internal_defs.h pollutes the namespace of everything defined after it, which is all/most of the sanitizer .h and .cc files and the included system headers with: using namespace __sanitizer; // NOLINT
This patch solves the problem by introducing the namespace only within the sanitizer namespaces as proposed by Dmitry.
Differential Revision: https://reviews.llvm.org/D21947
llvm-svn: 281657
These got out of sync and the tests were failing for me locally. We
assume a 47 bit address space in ASan, so we should do the same in the
tests.
llvm-svn: 281622
Don't list __sanitizer_print_memory profile as an INTERFACE_FUNCTION. It
is not exported by ASan; it is exported by user code.
Move the weak definition from asan_win.cc to sanitizer_win.cc to fix the
ubsan tests.
llvm-svn: 281619
Summary:
ASAN on Windows 64-bits should use a dynamic address instead of a fixed one.
The asan-allocator code to support dynamic address is already landed.
This patch is turning on the feature.
Reviewers: rnk
Subscribers: kubabrecka, dberris, llvm-commits, chrisha
Differential Revision: https://reviews.llvm.org/D24575
llvm-svn: 281522
When running with start_deactivated=1 in ASAN_OPTIONS, heap redzones
are not poisoned until the first instrumented module is loaded. This
can cause false negatives even on memory allocated after activation,
because redzones are normally poisoned only once when a new allocator
region is mapped.
This change attempts to fix it by iterating over all existing
allocator chunks and poisoning their redzones.
llvm-svn: 281364
Summary:
Added a macro to enumerate the (error name, error member name) pairs. This way,
when adding an error, we only need to add the pair to one place (plus add its
implementation, or course).
Reviewers: kcc, samsonov
Subscribers: llvm-commits, kubabrecka
Differential Revision: https://reviews.llvm.org/D23875
llvm-svn: 281237
Summary: As mentioned in D24394, I'm moving tid to ErrorBase, since basically all errors need it.
Also mentioned in the same review are other cleanups like adding const
to BufferedStackTrace and make sure constructor orders are consistent.
Reviewers: vitalybuka, kcc, eugenis
Subscribers: llvm-commits, kubabrecka
Differential Revision: https://reviews.llvm.org/D24455
llvm-svn: 281236
Summary:
This is important information when we want to describe errors, and should be
part of these descriptions. Otherwise, we need to know the access size when
printing/emitting the description.
Reviewers: kcc, eugenis, vitalybuka
Subscribers: llvm-commits, kubabrecka
Differential Revision: https://reviews.llvm.org/D24387
llvm-svn: 281093
Summary:
This is useful for inclusion in the Error* structures, to describe an
arbitrary address.
Remove the old struct since it's used only once. This removes one level of
indirection, and moves all *AddressDescription to be one of the recently
introduced structures.
This merges differential revisions: D24131 and D24132
Reviewers: kcc, eugenis, vitalybuka
Subscribers: kubabrecka, llvm-commits
Differential Revision: https://reviews.llvm.org/D24131
llvm-svn: 281090
r280885 added a testcase for handle_abort, which is broken on macOS, let’s add this support into sanitizer_mac.cc.
Differential Revision: https://reviews.llvm.org/D24344
llvm-svn: 280945
This patch adds a wrapper for call_once, which uses an already-compiled helper __call_once with an atomic release which is invisible to TSan. To avoid false positives, the interceptor performs an explicit atomic release in the callback wrapper.
Differential Revision: https://reviews.llvm.org/D24188
llvm-svn: 280920
Reset the SIGABRT signal handler before calling abort().
Also, change the error message when catching SIGABRT to say "ABRT"
instead of "SEGV".
llvm-svn: 280885
On Linux ARM, the syscall will take 3 arguments (start, end, flags). Ensure
that we do not pass garbage to the flags, which can cause the cacheflush call to
fail, and therefore cause an abort at runtime.
llvm-svn: 280877
Android-specific code in GetCurrentThread() does not handle the situation when there is no
ThreadContext for the current thread. This happens if the current thread is requested before the
main thread is added to the registry. 64-bit allocator does that to record map/unmap stats during
initialization.
llvm-svn: 280876
Normally, syslog() uses argv[0] for the log tag; bionic, however,
would crash in syslog() before libc constructor unless the log
tag is explicitly set with openlog().
llvm-svn: 280875
Summary:
A few small changes required to permit building the sanitizers
with Clang instead of only with MSVC.
Reviewers: compnerd, beanz, rnk
Subscribers: beanz, timurrrr, kubabrecka, dberris, llvm-commits
Differential Revision: https://reviews.llvm.org/D24092
llvm-svn: 280863
Since r279664 this test causes frequent failures of test runs for ppc64le and
occasional failures for ppc64be which makes buildbot results unreliable. If
the underlying problem is fixed it can be re-enabled.
llvm-svn: 280823
With this patch 10 out of 13 tests are passing.
Following is the list of failing tests:
struct-simple.cpp
workingset-signal-posix.cpp
mmap-shadow-conflict.c
Reviewed by bruening
Differential: D23799
llvm-svn: 280795
When optimizing, GCC optimizes away aggressively unused static globals.
The __asan_before_dynamic_init/__asan_after_dynamic_init calls are placed
in static constructor earlier while the registration of the globals is done
later in the compilation process. If all the globals with
dynamic initialization are optimized away from some particular TU in between
those two, libasan can fail on an assertion that dynamic_init_globals is
empty.
While I'm going to commit a GCC change which will remove the
__asan_before_dynamic_init/__asan_after_dynamic_init in many cases when this
happens (basically if the optimizers can prove there are no memory
references in between the two calls), there are still testcases where such
pair of calls is left, e.g. for
struct S { S () { asm volatile ("" : : : "memory"); } };
static S c;
int
main ()
{
return 0;
}
with -O2 -fsanitize=address and ASAN_OPTIONS=check_initialization_order=true
this still fails the assertion. Trying to avoid this problem on the
compiler side would decrease code quality I'm afraid, whether it is making
sure for -fsanitize=address we keep around at least one dynamically
initialized global if the
__asan_before_dynamic_init/__asan_after_dynamic_init pair has been emitted,
or adding some artificial global which would be used as the condition for
those calls etc.
So, can the assertion be instead just removed, this really shouldn't slow
down the calls measurably (for __asan_before_dynamic_init it is even
cheaper) and the assertion doesn't check something worthwhile anyway (it is
sufficient if there is a single dynamically initialized global in any other
TU to make it happy).
Details in http://gcc.gnu.org/PR77396
Author: Jakub Jelinek
llvm-svn: 280657
The atomic builtin source is problematic when cross-compiling builtins because it requires a variable and sometimes large set of system headers. This option allows users to optionally prevent it from being built.
llvm-svn: 280416
Etienne Bergeron