mac_ignore_invalid_free was helpful when ASan runtime used to intercept
CFAllocator and sometimes corrupted its memory. This behavior had been long
gone, and the flag was unused.
This patch also deletes ReportMacCfReallocUnknown(), which was used by the
CFAllocator realloc() wrapper.
llvm-svn: 254722
In AddressSanitizer, we have the MaybeReexec method to detect when we're running without DYLD_INSERT_LIBRARIES (in which case interceptors don't work) and re-execute with the environment variable set. On OS X 10.11+, this is no longer necessary, but to have ThreadSanitizer supported on older versions of OS X, let's use the same method as well. This patch moves the implementation from `asan/` into `sanitizer_common/`.
Differential Revision: http://reviews.llvm.org/D15123
llvm-svn: 254600
Calloc interceptor initially allocates memory from temp buffer (to serve dlsyms called during asan_init). There is a chance that some non-instrumented library (or executable) has allocated memory with calloc before asan_init and got pointer from the same temporary buffer which later caused problems with free.
Inspired by https://github.com/google/sanitizers/issues/626
Differential Revision: http://reviews.llvm.org/D14979
llvm-svn: 254395
[asan] On OS X, log reports to syslog and os_trace, has been reverted in r252076 due to deadlocks on earlier versions of OS X. Alexey has also noticed deadlocks in some corner cases on Linux. This patch, if applied on top of the logging patch (http://reviews.llvm.org/D13452), addresses the known deadlock issues.
(This also proactively removes the color escape sequences from the error report buffer since we have to copy the buffer anyway.)
Differential Revision: http://reviews.llvm.org/D14470
llvm-svn: 253689
When ASan currently detects a bug, by default it will only print out the text
of the report to stderr. This patch changes this behavior and writes the full
text of the report to syslog before we terminate the process. It also calls
os_trace (Activity Tracing available on OS X and iOS) with a message saying
that the report is available in syslog. This is useful, because this message
will be shown in the crash log.
For this to work, the patch makes sure we store the full report into
error_message_buffer unconditionally, and it also strips out ANSI escape
sequences from the report (they are used when producing colored reports).
I've initially tried to log to syslog during printing, which is done on Android
right now. The advantage is that if we crash during error reporting or the
produced error does not go through ScopedInErrorReport, we would still get a
(partial) message in the syslog. However, that solution is very problematic on
OS X. One issue is that the logging routine uses GCD, which may spawn a new
thread on its behalf. In many cases, the reporting logic locks threadRegistry,
which leads to deadlocks.
Reviewed at http://reviews.llvm.org/D13452
(In addition, add sanitizer_common_libcdep.cc to buildgo.sh to avoid
build failures on Linux.)
llvm-svn: 253688
This patch makes ASAN for aarch64 use the same shadow offset for all
currently supported VMAs (39 and 42 bits). The shadow offset is the
same for 39-bit (36).
llvm-svn: 252497
TSan needs to use a custom malloc zone on OS X, which is already implemented in ASan. This patch is a refactoring patch (NFC) that extracts this from ASan into sanitizer_common, where we can reuse it in TSan.
Reviewed at http://reviews.llvm.org/D14330
llvm-svn: 252052
This reverts commit r250823.
Replacing at least some of empty
constructors with "= default" variants is a semantical change which we
don't want. E.g. __tsan::ClockBlock contains a union of large arrays,
and it's critical for correctness and performance that we don't memset()
these arrays in the constructor.
llvm-svn: 251717
Define WIN32_LEAN_AND_MEAN before including Windows.h. This is already being
done in some places. This does it more broadly. This permits building ASAN on
Linux for Winndows, as well as reduces the amount of included declarations.
llvm-svn: 251649
When ASan currently detects a bug, by default it will only print out the text
of the report to stderr. This patch changes this behavior and writes the full
text of the report to syslog before we terminate the process. It also calls
os_trace (Activity Tracing available on OS X and iOS) with a message saying
that the report is available in syslog. This is useful, because this message
will be shown in the crash log.
For this to work, the patch makes sure we store the full report into
error_message_buffer unconditionally, and it also strips out ANSI escape
sequences from the report (they are used when producing colored reports).
I've initially tried to log to syslog during printing, which is done on Android
right now. The advantage is that if we crash during error reporting or the
produced error does not go through ScopedInErrorReport, we would still get a
(partial) message in the syslog. However, that solution is very problematic on
OS X. One issue is that the logging routine uses GCD, which may spawn a new
thread on its behalf. In many cases, the reporting logic locks threadRegistry,
which leads to deadlocks.
Reviewed at http://reviews.llvm.org/D13452
(In addition, add sanitizer_common_libcdep.cc to buildgo.sh to avoid
build failures on Linux.)
llvm-svn: 251577
app_process32, when started via a shell script wrapper, needs a
different security context to satisty SELinux.
Patch by Abhishek Arya.
llvm-svn: 251572
When ASan currently detects a bug, by default it will only print out the text
of the report to stderr. This patch changes this behavior and writes the full
text of the report to syslog before we terminate the process. It also calls
os_trace (Activity Tracing available on OS X and iOS) with a message saying
that the report is available in syslog. This is useful, because this message
will be shown in the crash log.
For this to work, the patch makes sure we store the full report into
error_message_buffer unconditionally, and it also strips out ANSI escape
sequences from the report (they are used when producing colored reports).
I've initially tried to log to syslog during printing, which is done on Android
right now. The advantage is that if we crash during error reporting or the
produced error does not go through ScopedInErrorReport, we would still get a
(partial) message in the syslog. However, that solution is very problematic on
OS X. One issue is that the logging routine uses GCD, which may spawn a new
thread on its behalf. In many cases, the reporting logic locks threadRegistry,
which leads to deadlocks.
Reviewed at http://reviews.llvm.org/D13452
llvm-svn: 251447
- Trim spaces.
- Use nullptr in place of 0 for pointer variables.
- Use '!p' in place of 'p == 0' for null pointer checks.
- Add blank lines to separate function definitions.
- Add 'extern "C"' or 'namespace foo' comments after the appropriate
closing brackets
This is a continuation of work from 409b7b82. The focus here is on the
various sanitizers (not sanitizer_common, as before).
Patch by Eugene Zelenko!
Differential Revision: http://reviews.llvm.org/D13225
llvm-svn: 248966
This fixes a crash in pthread_create on linux/i386 due to abi
incompatibility between intercepted and non-intercepted functions.
See the test case for more details.
llvm-svn: 248325
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
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
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:
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 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
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: 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
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
These changes break both autoconf Mac OS X buildbot (linker errors
due to wrong Makefiles) and CMake buildbot (safestack test failures).
llvm-svn: 245784
Alexander Potapenko