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
This patch enabled TSAN for aarch64 with 39-bit VMA layout. As defined by
tsan_platform.h the layout used is:
0000 4000 00 - 0200 0000 00: main binary
2000 0000 00 - 4000 0000 00: shadow memory
4000 0000 00 - 5000 0000 00: metainfo
5000 0000 00 - 6000 0000 00: -
6000 0000 00 - 6200 0000 00: traces
6200 0000 00 - 7d00 0000 00: -
7d00 0000 00 - 7e00 0000 00: heap
7e00 0000 00 - 7fff ffff ff: modules and main thread stack
Which gives it about 8GB for main binary, 4GB for heap and 8GB for
modules and main thread stack.
Most of tests are passing, with the exception of:
* ignore_lib0, ignore_lib1, ignore_lib3 due a kernel limitation for
no support to make mmap page non-executable.
* longjmp tests due missing specialized assembly routines.
These tests are xfail for now.
The only tsan issue still showing is:
rtl/TsanRtlTest/Posix.ThreadLocalAccesses
Which still required further investigation. The test is disable for
aarch64 for now.
llvm-svn: 244055
This patch enables asan for aarch64/linux. It marks it as 'unstable-release',
since some tests are failing due either kernel missing support of non-executable
pages in mmap or environment instability (infinite loop in juno reference
boards).
It sets decorate_proc_maps test to require stable-release, since the test expects
the shadow memory to not be executable and the support for aarch64 is only
added recently by Linux (da141706aea52c1a9 - 4.0).
It also XFAIL static_tls test for aarch64 linker may omit the __tls_get_addr call
as a TLS optimization.
llvm-svn: 244054
Summary:
This is consistent with binutils and ASan behavior on other platforms,
and makes it easier to use llvm-symbolizer with WinASan. The
--relative-address flag to llvm-symbolizer is also no longer needed.
An RVA is a "relative virtual address", meaning it is the address of
something inside the image minus the base of the mapping at runtime.
A VA in this context is an RVA plus the "preferred base" of the module,
and not a real runtime address. The real runtime address of a symbol
will equal the VA iff the module is loaded at its preferred base at
runtime.
On Windows, the preferred base is stored in the ImageBase field of one
of the PE file header, and this change adds the necessary code to
extract it. On Linux, this offset is typically included in program and
section headers of executables.
ELF shared objects typically use a preferred base of zero, meaning the
smallest p_vaddr field in the program headers is zero. This makes it so
that PIC and PIE module offsets come out looking like RVAs, but they're
actually VAs. The difference between them simply happens to be zero.
Reviewers: samsonov, majnemer
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D11681
llvm-svn: 243895
We currently have a dyld check in DyldNeedsEnvVariable that detects whether we are on a new OS X (10.11+) where we don't need to re-exec. For iOS simulator, we have a dlsym() hack that checks for a specific symbol, but this turns out to be fragile and problematic, because dlsym can sometimes call malloc(), which is not a good idea this early in the process runtime.
Let's instead of this do a direct comparison of dyld's version, which is exported in a public symbol `dyldVersionNumber`.
Differential Revision: http://reviews.llvm.org/D11719
llvm-svn: 243879
Negative numbers were handled properly initially, but got broken
during addressing review, so none of them did actually work. Issues:
* Wrong negation.
* Wrong exponent calculation.
llvm-svn: 243746
It's implicated in a buildbot failure and while the failure looks unrelated,
this commit is the only probably candidate in the blamelist.
llvm-svn: 243740
This patch enable DFSan for AArch64 (39-bit VMA). All tests are passing
but:
* test/dfsan/custom.cc
Due an invalid access in dl_iterate_phdr instrumentation (commenting out
this function make the testcase to pass). The test is XFAIL for aarch64
for now.
llvm-svn: 243688
Summary:
Using u64 as type for offset changes its value, changing starting address for map in file.
This patch solves Bug 24151, which raises issue while mapping file in mips32.
Patch by Mohit Bhakkad
Reviewers: dsanders, kcc
Subscribers: hans, llvm-commits, samsonov, nitesh.jain, sagar, bhushan, jaydeep
Differential Revision: http://reviews.llvm.org/D11588
llvm-svn: 243686
Let me tell you a story. Suppose you want to build your project (e.g. LLVM)
with CMake 2.8, Clang and AddressSanitizer. You also want to ensure that
Clang is fresh enough and check that CMAKE_CXX_COMPILER_VERSION is 3.1+.
This check would fail - CMake would fail to correctly calculate compiler
version if you pass CMAKE_CXX_FLAGS=-fsanitize=address.
The problem is funky compiler version calculation in
CMakeDetermineCompilerId.cmake module: it compiles the sample source
file with provided compiler and compile flags, runs "strings" and greps
for "INFO:" ASCII strings contained on the executable to fetch
"INFO:compiler", "INFO:compiler_version" etc. It limits the output of
grep to just 4 lines.
Unfortunately, if your executable was built with ASan, it would also contain
an ASCII string
INFO: %s ignores mlock/mlockall/munlock/munlockall
and INFO:compiler_version string would never be parsed.
All of the above actually happened after r243574 when we tried to
configure libcxx with just-built Clang with TSan/MSan, and the version
check mentioned above failed in HandleLLVMOptions.cmake
(╯°□°)╯.~.┻━┻
llvm-svn: 243599
ASan shadow on Android starts at address 0 for both historic and
performance reasons. This is possible because the platform mandates
-pie, which makes lower memory region always available.
This is not such a good idea on 64-bit platforms because of MAP_32BIT
incompatibility.
This patch changes Android/AArch64 mapping to be the same as that of
Linux/AAarch64.
llvm-svn: 243548
Rename getBinaryBasename() to getProcessName() and, on Linux,
read it from /proc/self/cmdline instead of /proc/self/exe. The former
can be modified by the process. The main motivation is Android, where
application processes re-write cmdline to a package name. This lets
us setup per-application ASAN_OPTIONS through include=/some/path/%b.
llvm-svn: 243473
callee-saved return address is stored in the caller's stack frame, not
the callee's. This patch adjusts the logic to find the LR in the
correct place for PowerPC.
Patch joint with Bill Seurer.
llvm-svn: 243467
This applies default compiler flags to .S files, in particular removing
the "-pedantic" option, which is desirable because there is nothing to
reasonably warn about; and the only thing that gcc warns about is that
you allegedly can't correctly invoke GLUE2 in lib/builtins/assembly.h
on platforms for which USER_LABEL_PREFIX is the empty string.
In the gcc bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33305 that
added the warning, a commenter notes that giving a macro of zero characters
to another macro is not precisely the same as failing to supply an argument,
and "there is a widespread belief in C++ community that such usage is valid".
Unfortunately the only way to silence the warning is to avoid -pedantic.
Differential Revision: http://reviews.llvm.org/D10713
llvm-svn: 243446
This sets the default ASan flags to abort_on_error=1 on OS X. For unit tests and lit tests we set ASAN_OPTIONS back to abort_on_error=0 before running the tests (to avoid crashing). I added two tests that intentionally don't respect the default ASAN_OPTIONS to test the behavior of an empty ASAN_OPTIONS (on OS X we should crash, on Linux we should exit()).
Differential Revision: http://reviews.llvm.org/D7203
llvm-svn: 243418
This fixes the bug https://llvm.org/bugs/show_bug.cgi?id=24152
The float value resides in the first 4 bytes of ValueHandle for both mips and mipsel.
Reviewers: dsanders, samsonov
Subscibers: rsmith, hans, mohit.bhakkad, jaydeep, llvm-commits
Differential: http://reviews.llvm.org/D11448
llvm-svn: 243384
Summary:
PTHREAD_CREATE_DETACHED has a different value on Mac OS X. Since both
PTHREAD_CREATE_JOINABLE and PTHREAD_CREATE_DETACHED are non-zero,
`__tsan::ThreadCreate` always creates detached threads.
Reviewers: kcc, samsonov, glider
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D10606
llvm-svn: 243151
Previously, Android target had a logic of duplicating all sanitizer
output to logcat. This change extends it to all posix platforms via
the use of syslog, controlled by log_to_syslog flag. Enabled by
default on Android, off everywhere else.
A bit of cmake magic is required to allow Printf() to call a libc
function. I'm adding a stub implementation to support no-libc builds
like dfsan and safestack.
This is a second attempt. I believe I've fixed all the issues that
prompted the revert: Mac build, and all kinds of non-CMake builds
(there are 3 of those).
llvm-svn: 243051
There are some test failures after r243003 and r243004 ("Rename the ABI
versioning symbol to '__asan_version_mismatch_check' instead abusing
'__asan_init'"). See http://reviews.llvm.org/D11004
llvm-svn: 243007
Evgeniy Stepanov