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A pass that adds random noops to X86 binaries to introduce diversity with the goal of increasing security against most return-oriented programming attacks.
Command line options:
-noop-insertion // Enable noop insertion.
-noop-insertion-percentage=X // X% of assembly instructions will have a noop prepended (default: 50%, requires -noop-insertion)
-max-noops-per-instruction=X // Randomly generate X noops per instruction. ie. roll the dice X times with probability set above (default: 1). This doesn't guarantee X noop instructions.
In addition, the following 'quick switch' in clang enables basic diversity using default settings (currently: noop insertion and schedule randomization; it is intended to be extended in the future).
-fdiversify
This is the clang part of the patch.
llvm part: D3392
http://reviews.llvm.org/D3393
Patch by Stephen Crane (@rinon)
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@225910 91177308-0d34-0410-b5e6-96231b3b80d8
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Introduce the following -fsanitize-recover flags:
- -fsanitize-recover=<list>: Enable recovery for selected checks or
group of checks. It is forbidden to explicitly list unrecoverable
sanitizers here (that is, "address", "unreachable", "return").
- -fno-sanitize-recover=<list>: Disable recovery for selected checks or
group of checks.
- -f(no-)?sanitize-recover is now a synonym for
-f(no-)?sanitize-recover=undefined,integer and will soon be deprecated.
These flags are parsed left to right, and mask of "recoverable"
sanitizer is updated accordingly, much like what we do for -fsanitize= flags.
-fsanitize= and -fsanitize-recover= flag families are independent.
CodeGen change: If there is a single UBSan handler function, responsible
for implementing multiple checks, which have different recoverable setting,
then we emit two handler calls instead of one:
the first one for the set of "unrecoverable" checks, another one - for
set of "recoverable" checks. If all checks implemented by a handler have the
same recoverability setting, then the generated code will be the same.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@225719 91177308-0d34-0410-b5e6-96231b3b80d8
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Allow blessed access to the symbol rewriter from the driver. Although the
symbol rewriter could be invoked through tools like opt and llc, it would not
accessible from the frontend. This allows us to read the rewrite map files in
the frontend rather than the backend and enable symbol rewriting for actually
performing the symbol interpositioning.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@225504 91177308-0d34-0410-b5e6-96231b3b80d8
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getMainExecutable() returns a std::string, assigning its result
to StringRef immediately creates a dangling pointer. This was
detected by half-broken fast-MSan-bootstrap bot.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224956 91177308-0d34-0410-b5e6-96231b3b80d8
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a CLANG_LIBDIR_SUFFIX down from the build system and using that as part
of the default resource dir computation.
Without this, essentially nothing that uses the clang driver works when
building clang with a libdir suffix. This is probably the single biggest
missing piece of support for multilib as without this people could hack
clang to end up installed in the correct location, but it would then
fail to find its own basic resources. I know of at least one distro that
has some variation on this patch to hack around this; hopefully they'll
be able to use the libdir suffix functionality directly as the rest of
these bits land.
This required fixing a copy of the code to compute Clang's resource
directory that is buried inside of the frontend (!!!). It had bitrotted
significantly relative to the driver code. I've made it essentially
a clone of the driver code in order to keep tests (which use cc1
heavily) passing. This copy should probably just be removed and the
frontend taught to always rely on an explicit resource directory from
the driver, but that is a much more invasive change for another day.
I've also updated one test which actually encoded the resource directory
in its checked output to tolerate multilib suffixes.
Note that this relies on a prior LLVM commit to add a stub to the
autoconf build system for this variable.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224924 91177308-0d34-0410-b5e6-96231b3b80d8
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-trigraphs is now an alias for -ftrigraphs. -fno-trigraphs makes it possible
to explicitly disable trigraphs, which couldn't be done before.
clang -std=c++11 -fno-trigraphs
now builds without GNU extensions, but with trigraphs disabled. Previously,
trigraphs were only disabled in GNU modes or with -std=c++1z.
Make the new -f flags the cc1 interface too. This requires changing -trigraphs
to -ftrigraphs in a few cc1 tests.
Related to PR21974.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224790 91177308-0d34-0410-b5e6-96231b3b80d8
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The default value of Opts.Trigraphs now no longer depends solely on the
language input kind, so move the code out of setLangDefaults(). Also make
sure that Opts.MSVCCompat is set before the Trigraph code runs.
Related to PR21974.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224719 91177308-0d34-0410-b5e6-96231b3b80d8
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We were checking the value after truncating it to a bitfield.
Thanks to Yunzhong Gao for noticing it.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224378 91177308-0d34-0410-b5e6-96231b3b80d8
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we'll do spell checking. Note that spell checking will change the produced AST, so we don't automatically change this value when someone sets -ferror-limit=. With this, merge test typo-correction-pt2.cpp into typo-correction.cpp.
Remove Sema::UnqualifiedTyposCorrected, a cache of corrected typos. It would only cache typo corrections that didn't provide ValidateCandidate of which there were few left, and it had a bug when we had the same identifier spelled wrong twice. See the last two tests in typo-correction.cpp for cases this fires.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224375 91177308-0d34-0410-b5e6-96231b3b80d8
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arithmetic relaxation flags:
-cl-no-signed-zeros
-cl-unsafe-math-optimizations
-cl-finite-math-only
-cl-fast-relaxed-math
Propagate the info to FP instruction flags as well
as function attributes where they are available.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@223928 91177308-0d34-0410-b5e6-96231b3b80d8
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Original commit message:
[modules] Add experimental -fmodule-map-file-home-is-cwd flag to -cc1.
For files named by -fmodule-map-file=, and files found by 'extern module'
directives, this flag specifies that we should resolve filenames relative to
the current working directory rather than relative to the directory in which
the module map file resides. This is aimed at fixing path handling, in
particular for relative -I paths, when building modules that represent
components of the current project (rather than libraries installed on the
current system, which the current project has as dependencies, where we'd
typically expect the module map files to be looked up implicitly).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@223913 91177308-0d34-0410-b5e6-96231b3b80d8
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This reverts commit r223753. It broke the Green Dragon build for a few
hours:
http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental_build/2259/
http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental_build/2259/consoleFull#43901905849ba4694-19c4-4d7e-bec5-911270d8a58c
I suspect `clang-tools-extra` just needs a follow-up for an API change,
but I'm not the right one to look into it.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@223759 91177308-0d34-0410-b5e6-96231b3b80d8
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For files named by -fmodule-map-file=, and files found by 'extern module'
directives, this flag specifies that we should resolve filenames relative to
the current working directory rather than relative to the directory in which
the module map file resides. This is aimed at fixing path handling, in
particular for relative -I paths, when building modules that represent
components of the current project (rather than libraries installed on the
current system, which the current project has as dependencies, where we'd
typically expect the module map files to be looked up implicitly).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@223753 91177308-0d34-0410-b5e6-96231b3b80d8
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diagnostics if they don't exist. Based on a patch by John Thompson!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@223561 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
Allow CUDA host device functions with two code paths using __CUDA_ARCH__
to differentiate between code path being compiled.
For example:
__host__ __device__ void host_device_function(void) {
#ifdef __CUDA_ARCH__
device_only_function();
#else
host_only_function();
#endif
}
Patch by Jacques Pienaar.
Reviewed By: rnk
Differential Revision: http://reviews.llvm.org/D6457
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@223271 91177308-0d34-0410-b5e6-96231b3b80d8
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This suppresses the implicit search for files called 'module.modulemap' and
similar.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222745 91177308-0d34-0410-b5e6-96231b3b80d8
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This option sets language mode for the compilation of a source file to be OpenCL v2.0.
Example: clang -cc1 -cl-std=CL2.0 myfile.cl
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@222444 91177308-0d34-0410-b5e6-96231b3b80d8
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This option was misleading because it looked like it enabled the
language feature of SEH (__try / __except), when this option was really
controlling which EH personality function to use. Mingw only supports
SEH and SjLj EH on x86_64, so we can simply do away with this flag.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221963 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
This change makes the asan-coverge (formerly -mllvm -asan-coverge)
accessible via a clang flag.
Companion patch to LLVM is http://reviews.llvm.org/D6152
Test Plan: regression tests, chromium
Reviewers: samsonov
Reviewed By: samsonov
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D6153
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221719 91177308-0d34-0410-b5e6-96231b3b80d8
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Get rid of ugly SanitizerOptions class thrust into LangOptions:
* Make SanitizeAddressFieldPadding a regular language option,
and rely on default behavior to initialize/reset it.
* Make SanitizerBlacklistFile a regular member LangOptions.
* Introduce the helper class "SanitizerSet" to represent the
set of enabled sanitizers and make it a member of LangOptions.
It is exactly the entity we want to cache and modify in CodeGenFunction,
for instance. We'd also be able to reuse SanitizerSet in
CodeGenOptions for storing the set of recoverable sanitizers,
and in the Driver to represent the set of sanitizers
turned on/off by the commandline flags.
No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221653 91177308-0d34-0410-b5e6-96231b3b80d8
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Use the bitmask to store the set of enabled sanitizers instead of a
bitfield. On the negative side, it makes syntax for querying the
set of enabled sanitizers a bit more clunky. On the positive side, we
will be able to use SanitizerKind to eventually implement the
new semantics for -fsanitize-recover= flag, that would allow us
to make some sanitizers recoverable, and some non-recoverable.
No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221558 91177308-0d34-0410-b5e6-96231b3b80d8
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,-objcmt-migrate-property-dot-syntax, when migarting to use
property-dot syntax in place of messaging expression.
rdar://18839124
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221001 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220543 91177308-0d34-0410-b5e6-96231b3b80d8
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Currently, when --serialize-diagnostics is passed this only includes
the diagnostics from clang -cc1, and driver diagnostics are
dropped. This causes issues for tools that use the serialized
diagnostics, since stderr is lost and these diagnostics aren't seen at
all.
We handle this by merging the diagnostics from the CC1 process and the
driver diagnostics into a single file when the driver invokes CC1.
Fixes rdar://problem/10585062
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220525 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
When using a profile, we used to require the use -gmlt so that we could
get access to the line locations. This is used to match line numbers in
the input profile to the line numbers in the function's IR.
But this is actually not necessary. The driver can provide source
location tracking without the emission of debug information. In these
cases, the annotation 'llvm.dbg.cu' is missing from the IR, but the
actual line location annotations are still present.
This patch tells the driver to only emit source location tracking
when -fprofile-sample-use is present in the command line.
Reviewers: echristo, dblaikie
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D5888
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220383 91177308-0d34-0410-b5e6-96231b3b80d8
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Implicit module builds are not well-suited to a lot of build systems. In
particular, they fare badly in distributed build systems, and they lead to
build artifacts that are not tracked as part of the usual dependency management
process. This change allows explicitly-built module files (which are already
supported through the -emit-module flag) to be explicitly loaded into a build,
allowing build systems to opt to manage module builds and dependencies
themselves.
This is only the first step in supporting such configurations, and it should
be considered experimental and subject to change or removal for now.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220359 91177308-0d34-0410-b5e6-96231b3b80d8
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This is long-since overdue, and matches GCC 5.0. This should also be
backwards-compatible, because we already supported all of C11 as an extension
in C99 mode.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@220244 91177308-0d34-0410-b5e6-96231b3b80d8
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After http://reviews.llvm.org/D5687 is submitted, we will need
SanitizerBlacklist before the CodeGen phase, so make it a LangOpt
(as it will actually affect ABI / class layout).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219842 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
This change adds an experimental flag -fsanitize-address-field-padding=N (0, 1, 2)
to clang and driver. With this flag ASAN will be able to detect some cases of
intra-object-overflow bugs,
see https://code.google.com/p/address-sanitizer/wiki/IntraObjectOverflow
There is no actual functionality here yet, just the flag parsing.
The functionality is being reviewed at http://reviews.llvm.org/D5687
Test Plan: Build and run SPEC, LLVM Bootstrap, Chrome with this flag.
Reviewers: samsonov
Reviewed By: samsonov
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D5676
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219417 91177308-0d34-0410-b5e6-96231b3b80d8
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single threaded systems
http://reviews.llvm.org/D4985
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219027 91177308-0d34-0410-b5e6-96231b3b80d8
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This adds a flag called -fseh-exceptions that uses the native Windows
.pdata and .xdata unwind mechanism to throw exceptions. The other EH
possibilities are DWARF and SJLJ exceptions.
Patch by Martell Malone!
Reviewed By: asl, rnk
Differential Revision: http://reviews.llvm.org/D3419
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@217790 91177308-0d34-0410-b5e6-96231b3b80d8
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No functional change intended.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216888 91177308-0d34-0410-b5e6-96231b3b80d8
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People have been incorrectly using "-analyzer-disable-checker" to
silence analyzer warnings on a file, when analyzing a project. Add
the "-analyzer-disable-all-checks" option, which would allow the
suppression and suggest it as part of the error message for
"-analyzer-disable-checker". The idea here is to compose this with
"--analyze" so that users can selectively opt out specific files from
static analysis.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216763 91177308-0d34-0410-b5e6-96231b3b80d8
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ACLE 2.0 allows __fp16 to be used as a function argument or return
type. This enables this for AArch64.
This also fixes an existing bug that causes clang to not allow
homogeneous floating-point aggregates with a base type of __fp16. This
is valid for AAPCS64, but not for AAPCS-VFP.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216558 91177308-0d34-0410-b5e6-96231b3b80d8
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flag.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@216472 91177308-0d34-0410-b5e6-96231b3b80d8
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Changes diagnostic options, language standard options, diagnostic identifiers, diagnostic wording to use c++14 instead of c++1y. It also modifies related test cases to use the updated diagnostic wording.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215982 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215853 91177308-0d34-0410-b5e6-96231b3b80d8
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anyway. If -ast-dump *is* also provided, then dump the AST declarations as well
as the lookup results. This is invaluable for cross-correlating the lookup
information with the declarations actually found.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215393 91177308-0d34-0410-b5e6-96231b3b80d8
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Differential Revision: http://reviews.llvm.org/D4799
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215258 91177308-0d34-0410-b5e6-96231b3b80d8
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intent when we added remark support, but was never implemented in the general
case, because the first -R flags didn't need it. (-Rpass= had special handling
to accomodate its argument.)
-Rno-foo, -Reverything, and -Rno-everything can be used to turn off a remark,
or to turn on or off all remarks. Per discussion on cfe-commits, -Weverything
does not affect remarks, and -Reverything does not affect warnings or errors.
The only "real" -R flag we have right now is -Rmodule-build; that flag is
effectively renamed from -Wmodule-build to -Rmodule-build by this change.
-Wpass and -Wno-pass (and their friends) are also renamed to -Rpass and
-Rno-pass by this change; it's not completely clear whether we intended to have
a -Rpass (with no =pattern), but that is unchanged by this commit, other than
the flag name. The default pattern is effectively one which matches no passes.
In future, we may want to make the default pattern be .*, so that -Reverything
works for -Rpass properly.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215046 91177308-0d34-0410-b5e6-96231b3b80d8
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to instruct the code generator to not enforce a higher alignment
than the given number (of bytes) when accessing memory via an opaque
pointer or reference. Patch reviewed by John McCall (with post-commit
review pending). rdar://16254558
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@214911 91177308-0d34-0410-b5e6-96231b3b80d8
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This patch adds the '-fcoverage-mapping' option which
allows clang to generate the coverage mapping information
that can be used to provide code coverage analysis using
the execution counts obtained from the instrumentation
based profiling (-fprofile-instr-generate).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@214752 91177308-0d34-0410-b5e6-96231b3b80d8
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This flag specifies that we are building an implementation file of the
module <name>, preventing importing <name> as a module. This does not
consider this to be the 'current module' for the purposes of doing
modular checks like decluse or non-modular-include warnings, unlike
-fmodule-name.
This is needed as a stopgap until:
1) we can resolve relative includes to a VFS-mapped module (or can
safely import a header textually and as part of a module)
and ideally
2) we can safely do incremental rebuilding when implementation files
import submodules.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213767 91177308-0d34-0410-b5e6-96231b3b80d8
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This restores the original behaviour of -fmsc-version. The older option
remains as a mechanism for specifying the basic version information. A
secondary option, -fms-compatibility-version permits the user to specify an
extended version to the driver.
The new version takes the value as a dot-separated value rather than the
major * 100 + minor format that -fmsc-version format. This makes it easier to
specify the value as well as a more flexible manner for specifying the value.
Specifying both values is considered an error.
The older parameter is left solely as a driver option, which is normalised into
the newer parameter. This allows us to retain a single code path in the
compiler itself whilst preserving the semantics of the old parameter as well as
avoid having to determine which of two formats are being used by the invocation.
The test changes are due to the fact that the compiler no longer supports the
old option, and is a direct conversion to the new option.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213119 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@212408 91177308-0d34-0410-b5e6-96231b3b80d8
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git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@212369 91177308-0d34-0410-b5e6-96231b3b80d8
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There are slight differences between /GR- and -fno-rtti which made
mapping one to the other inappropriate.
-fno-rtti disables dynamic_cast, typeid, and does not emit RTTI related
information for the v-table.
/GR- does not generate complete object locators and thus will not
reference them in vftables. However, constructs like dynamic_cast and
typeid are permitted.
This should bring our implementation of RTTI up to semantic parity with
MSVC modulo bugs.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@212138 91177308-0d34-0410-b5e6-96231b3b80d8
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Summary:
This new debug emission kind supports emitting line location
information in all instructions, but stops code generation
from emitting debug info to the final output.
This mode is useful when the backend wants to track source
locations during code generation, but it does not want to
produce debug info. This is currently used by optimization
remarks (-Rpass, -Rpass-missed and -Rpass-analysis).
When one of the -Rpass flags is used, the front end will enable
location tracking, only if no other debug option is enabled.
To prevent debug information from being generated, a new debug
info kind LocTrackingOnly causes DIBuilder::createCompileUnit() to
not emit the llvm.dbg.cu annotation. This blocks final code generation
from generating debug info in the back end.
Depends on D4234.
Reviewers: echristo, dblaikie
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D4235
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211610 91177308-0d34-0410-b5e6-96231b3b80d8
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Ensure that we properly handle the case where just the major version component
is provided by the user.
Thanks to Alp Toker for pointing out that this was not handled correctly!
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211506 91177308-0d34-0410-b5e6-96231b3b80d8
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The version information for Visual Studio is spread over multiple variables.
The newer Windows SDK has started making use of some of the extended versioning
variables that were previously undefined. Enhance our compatibility definitions
for these cases.
_MSC_VER is defined to be the Major * 100 + Minor. _MSC_FULL_VER is defined to
be Major * 10000000 + Minor * 100000 + Build. And _MSC_BUILD is the build
revision of the compiler.
Extend the -fmsc-version option in a compatible manner. If the value is the
previous form of MMmm, then we assume that the build number is 0. Otherwise, a
specific build number may be passed by using the form MMmmbbbbb. Due to
bitwidth limitations of the option, it is currently not possible to define a
revision value.
The version information can be passed as either the decimal encoded value
(_MSC_FULL_VER or _MSC_VER) or as a dot-delimited value.
The change to the TextDiagnostic is to deal with the updated encoding of the
version information.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211420 91177308-0d34-0410-b5e6-96231b3b80d8
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