Commit Graph

26 Commits

Author SHA1 Message Date
Alexey Samsonov 90490af21d Add -link-cxx-sanitizer driver flag.
Summary:
This flag can be used to force linking of CXX-specific parts
of sanitizer runtimes into the final executable. It gives more precise
control than --driver-mode=g++ and comes handy when user links several
object files with sanitized C++ code into an executable, but wants
to provide libstdc++ himself, instead of relying on Clang dirver's
behavior.

Test Plan: clang regression test suite

Reviewers: chandlerc, rsmith

Reviewed By: rsmith

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D4824

llvm-svn: 215252
2014-08-08 22:47:17 +00:00
Alexey Samsonov b7dd329f2f Decouple llvm::SpecialCaseList text representation and its LLVM IR semantics.
Turn llvm::SpecialCaseList into a simple class that parses text files in
a specified format and knows nothing about LLVM IR. Move this class into
LLVMSupport library. Implement two users of this class:
  * DFSanABIList in DFSan instrumentation pass.
  * SanitizerBlacklist in Clang CodeGen library.
The latter will be modified to use actual source-level information from frontend
(source file names) instead of unstable LLVM IR things (LLVM Module identifier).

Remove dependency edge from ClangCodeGen/ClangDriver to LLVMTransformUtils.

No functionality change.

llvm-svn: 212643
2014-07-09 19:40:08 +00:00
Alexey Samsonov e595e1ade0 Remove top-level Clang -fsanitize= flags for optional ASan features.
Init-order and use-after-return modes can currently be enabled
by runtime flags. use-after-scope mode is not really working at the
moment.

The only problem I see is that users won't be able to disable extra
instrumentation for init-order and use-after-scope by a top-level Clang flag.
But this instrumentation was implicitly enabled for quite a while and
we didn't hear from users hurt by it.

llvm-svn: 210924
2014-06-13 17:53:44 +00:00
Evgeniy Stepanov 6f0ae18a59 Fix driver warning about -shared-libasan on Android.
Asan runtime library is always shared on Android, and -shared-libasan is no-op.
Suppress the unused argument warning.

llvm-svn: 210252
2014-06-05 11:14:00 +00:00
Craig Topper 92fc2dfa6f [C++11] Use 'nullptr'. Driver edition.
llvm-svn: 209069
2014-05-17 16:56:41 +00:00
Alexey Samsonov bdfa6c2517 Add support for dynamic ASan runtime (on Linux) to Clang driver.
Based on http://llvm-reviews.chandlerc.com/D3043 by Yuri Gribov!

llvm-svn: 205310
2014-04-01 13:31:10 +00:00
Alexey Samsonov e1237993c7 Kill deprecated -fbounds-checking flag
llvm-svn: 204436
2014-03-21 07:15:47 +00:00
Evgeniy Stepanov 2bfcaabdec [msan] -fsanitize-memory-track-origins=[level] flag and docs.
This change turns -fsanitize-memory-track-origins into
-fsanitize-memory-track-origins=[level] flag (keeping the old one for
compatibility). Possible levels are 0 (off), 1 (default) and 2 (incredibly
detailed). See docs (part of this patch) for more info.

llvm-svn: 204346
2014-03-20 14:58:36 +00:00
Alexey Samsonov cb3f812b6b Kill -faddress-sanitizer, -fthread-sanitizer and -fcatch-undefined-behavior flags.
These flags are deprecated since at least Clang 3.3. Users should instead
use -fsanitize= with appropriate values.

llvm-svn: 204330
2014-03-20 10:48:29 +00:00
Ahmed Charles dfca6f97bc [C++11] Replace OwningPtr include with <memory>.
llvm-svn: 203389
2014-03-09 11:36:40 +00:00
Ahmed Charles b89843299a Replace OwningPtr with std::unique_ptr.
This compiles cleanly with lldb/lld/clang-tools-extra/llvm.

llvm-svn: 203279
2014-03-07 20:03:18 +00:00
Evgeniy Stepanov d04b861e69 [asan] Remove -fsanitize-address-zero-base-shadow command line
flag from clang, and disable zero-base shadow support on all platforms
where it is not the default behavior.

- It is completely unused, as far as we know.
- It is ABI-incompatible with non-zero-base shadow, which means all
objects in a process must be built with the same setting. Failing to
do so results in a segmentation fault at runtime.
- It introduces a backward dependency of compiler-rt on user code,
which is uncommon and complicates testing.

This is the Clang part of a larger change.

llvm-svn: 199372
2014-01-16 10:19:31 +00:00
Chandler Carruth 5553d0d4ca Sort all the #include lines with LLVM's utils/sort_includes.py which
encodes the canonical rules for LLVM's style. I noticed this had drifted
quite a bit when cleaning up LLVM, so wanted to clean up Clang as well.

llvm-svn: 198686
2014-01-07 11:51:46 +00:00
Alp Toker f6a24ce40f Fix a tranche of comment, test and doc typos
llvm-svn: 196510
2013-12-05 16:25:25 +00:00
Peter Collingbourne 3270164f39 SanitizerArgs: add ability to filter/diagnose unsupported sanitizers.
The thread, memory, dataflow and function sanitizers are now diagnosed if
enabled explicitly on an unsupported platform.  Unsupported sanitizers which
are enabled implicitly (as part of a larger group) are silently disabled.  As a
side effect, this makes SanitizerArgs parsing toolchain-dependent (and thus
essentially reverts r188058), and moves SanitizerArgs ownership to ToolChain.

Differential Revision: http://llvm-reviews.chandlerc.com/D1990

llvm-svn: 193875
2013-11-01 18:16:25 +00:00
Richard Smith 6b53e224eb Split -fsanitize=bounds to -fsanitize=array-bounds (for the frontend-inserted
check using the ubsan runtime) and -fsanitize=local-bounds (for the middle-end
check which inserts traps).

Remove -fsanitize=local-bounds from -fsanitize=undefined. It does not produce
useful diagnostics and has false positives (PR17635), and is not a good
compromise position between UBSan's checks and ASan's checks.

Map -fbounds-checking to -fsanitize=local-bounds to restore Clang's historical
behavior for that flag.

llvm-svn: 193205
2013-10-22 22:51:04 +00:00
Kostya Serebryany bedc616804 Enable -fsanitize=use-after-return by default under -fsanitize=address
Summary:
We enable ASAN's use-after-return instrumentation at compile-time,
but still keep it disabled at run-time.
This enables the users to flip the flag at run-time using environment variable
ASAN_OPTIONS=detect_stack_use_after_return=1 instead of using a separate build.
If UAR detection is disabled at run-time, this extra compile-time instrumentation
costs very small slowdown. On SPEC 2006 14 tests are not affected at all,
4 tests get ~ 1% slowdown and 453.povray gets 4%.

Reviewers: samsonov

Reviewed By: samsonov

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1741

llvm-svn: 191186
2013-09-23 09:52:37 +00:00
Alexey Samsonov 0c127d7c71 Re-apply r188666
llvm-svn: 188675
2013-08-19 13:59:22 +00:00
Alexey Samsonov bca169c185 Revert r188666: it breaks the buildbots
llvm-svn: 188667
2013-08-19 11:42:54 +00:00
Alexey Samsonov 828e5e141d Fix PR16768: properly report malformed sanitizer blacklist file contents
llvm-svn: 188666
2013-08-19 10:41:30 +00:00
Alexey Samsonov 609213f9eb Move SanitizerArgs to the clang Driver
Summary:
This change turns SanitizerArgs into high-level options
stored in the Driver, which are parsed lazily. This fixes an issue of multiple copies of the same diagnostic message produced by sanitizer arguments parser.

Reviewers: rsmith

Reviewed By: rsmith

CC: chandlerc, eugenis, cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1341

llvm-svn: 188660
2013-08-19 09:14:21 +00:00
Peter Collingbourne 276be3c57c Add support for -fsanitize-blacklist and default blacklists for DFSan.
Also add some documentation.

Differential Revision: http://llvm-reviews.chandlerc.com/D1346

llvm-svn: 188403
2013-08-14 18:54:18 +00:00
Alexey Samsonov 71c197b81c Fixup for r188058: assume hasAsanZeroBaseShadow() is false if ASan is not needed
llvm-svn: 188068
2013-08-09 10:56:42 +00:00
Alexey Samsonov e620366aa3 Make SanitizerArgs parsing toolchain-independent
llvm-svn: 188058
2013-08-09 07:42:13 +00:00
Alexey Samsonov bb14f34cde Factor out parsing sanitizer arguments to a separate function
llvm-svn: 187977
2013-08-08 11:32:17 +00:00
Alexey Samsonov cf0559644f Move SanitizerArgs implementation from .h to .cpp
llvm-svn: 187972
2013-08-08 10:11:02 +00:00