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162 Commits

Author SHA1 Message Date
Evgeniy Stepanov
610469f4c2 [msan] Origin tracking with history. 
LLVM part of MSan implementation of advanced origin tracking,
when we record not only creation point, but all locations where
an uninitialized value was stored to memory, too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204151 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-03-18 13:30:56 +00:00
Evgeniy Stepanov
bf7cc396c6 AddressSanitizer instrumentation for MOV and MOVAPS. 
This is an initial version of *Sanitizer instrumentation of assembly code.

Patch by Yuri Gorshenin.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203908 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-03-14 08:58:04 +00:00
Evgeniy Stepanov
2da418712c [msan] Fix handling of byval arguments in VarArg calls. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203794 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-03-13 13:17:11 +00:00
Tim Northover
ca396e391e IR: add a second ordering operand to cmpxhg for failure 
The syntax for "cmpxchg" should now look something like:

	cmpxchg i32* %addr, i32 42, i32 3 acquire monotonic

where the second ordering argument gives the required semantics in the case
that no exchange takes place. It should be no stronger than the first ordering
constraint and cannot be either "release" or "acq_rel" (since no store will
have taken place).

rdar://problem/15996804

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203559 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-03-11 10:48:52 +00:00
Evgeniy Stepanov
8b77d958fd [msan] Handle X86 SIMD bitshift intrinsics. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202712 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-03-03 13:47:42 +00:00
Kostya Serebryany
596d621b57 [asan] remove test that should have been removed in r202033 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202034 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-02-24 13:44:24 +00:00
Rafael Espindola
737c9f6005 Add back r201608, r201622, r201624 and r201625 
r201608 made llvm corretly handle private globals with MachO. r201622 fixed
a bug in it and r201624 and r201625 were changes for using private linkage,
assuming that llvm would do the right thing.

They all got reverted because r201608 introduced a crash in LTO. This patch
includes a fix for that. The issue was that TargetLoweringObjectFile now has
to be initialized before we can mangle names of private globals. This is
trivially true during the normal codegen pipeline (the asm printer does it),
but LTO has to do it manually.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201700 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-02-19 17:23:20 +00:00
Rafael Espindola
3e0d3a45e5 This reverts commit r201625 and r201624. 
Since r201608 got reverted, it is not safe to use private linkage in these cases
until it is committed back.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201688 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-02-19 15:49:46 +00:00
Rafael Espindola
070b5745ae Now that llvm always does the right thing with private, use it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201625 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-02-19 02:08:39 +00:00
Kostya Serebryany
8cab11a9f8 [asan] support for FreeBSD, LLVM part. patch by Viktor Kutuzov 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201067 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-02-10 07:37:04 +00:00
Kostya Serebryany
06fd4ed4c9 [asan] simplify a test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200378 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-01-29 07:35:43 +00:00
Kostya Serebryany
bd2c711cdd [asan] extend asan-coverage (still experimental). 
- add a mode for collecting per-block coverage (-asan-coverage=2).
   So far the implementation is naive (all blocks are instrumented),
   the performance overhead on top of asan could be as high as 30%.
 - Make sure the one-time calls to __sanitizer_cov are moved to function buttom,
   which in turn required to copy the original debug info into the call insn.

Here is the performance data on SPEC 2006
(train data, comparing asan with asan-coverage={0,1,2}):

                             asan+cov0     asan+cov1      diff 0-1    asan+cov2       diff 0-2      diff 1-2
       400.perlbench,        65.60,        65.80,         1.00,        76.20,         1.16,         1.16
           401.bzip2,        65.10,        65.50,         1.01,        75.90,         1.17,         1.16
             403.gcc,         1.64,         1.69,         1.03,         2.04,         1.24,         1.21
             429.mcf,        21.90,        22.60,         1.03,        23.20,         1.06,         1.03
           445.gobmk,       166.00,       169.00,         1.02,       205.00,         1.23,         1.21
           456.hmmer,        88.30,        87.90,         1.00,        91.00,         1.03,         1.04
           458.sjeng,       210.00,       222.00,         1.06,       258.00,         1.23,         1.16
      462.libquantum,         1.73,         1.75,         1.01,         2.11,         1.22,         1.21
         464.h264ref,       147.00,       152.00,         1.03,       160.00,         1.09,         1.05
         471.omnetpp,       115.00,       116.00,         1.01,       140.00,         1.22,         1.21
           473.astar,       133.00,       131.00,         0.98,       142.00,         1.07,         1.08
       483.xalancbmk,       118.00,       120.00,         1.02,       154.00,         1.31,         1.28
            433.milc,        19.80,        20.00,         1.01,        20.10,         1.02,         1.01
            444.namd,        16.20,        16.20,         1.00,        17.60,         1.09,         1.09
          447.dealII,        41.80,        42.20,         1.01,        43.50,         1.04,         1.03
          450.soplex,         7.51,         7.82,         1.04,         8.25,         1.10,         1.05
          453.povray,        14.00,        14.40,         1.03,        15.80,         1.13,         1.10
             470.lbm,        33.30,        34.10,         1.02,        34.10,         1.02,         1.00
         482.sphinx3,        12.40,        12.30,         0.99,        13.00,         1.05,         1.06


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199488 91177308-0d34-0410-b5e6-96231b3b80d8
 2014-01-17 11:00:30 +00:00
Alexander Potapenko
ca523f4f3d [ASan] Fix the tests broken by r198018 to check for private linkage of ASan-generated globals. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198020 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-12-25 17:06:04 +00:00
Kostya Serebryany
26f1d1cbbc [asan] don't unpoison redzones on function exit in use-after-return mode. 
Summary:
Before this change the instrumented code before Ret instructions looked like:
  <Unpoison Frame Redzones>
  if (Frame != OriginalFrame) // I.e. Frame is fake
     <Poison Complete Frame>

Now the instrumented code looks like:
  if (Frame != OriginalFrame) // I.e. Frame is fake
     <Poison Complete Frame>
  else
     <Unpoison Frame Redzones>

Reviewers: eugenis

Reviewed By: eugenis

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D2458

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197907 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-12-23 14:15:08 +00:00
Evgeniy Stepanov
a7eb2b83ba Add an explicit insert point argument to SplitBlockAndInsertIfThen. 
Currently SplitBlockAndInsertIfThen requires that branch condition is an
Instruction itself, which is very inconvenient, because it is sometimes an
Operator, or even a Constant.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197677 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-12-19 13:29:56 +00:00
Matt Arsenault
1e80bef896 Teach MemoryBuiltins about address spaces 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197292 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-12-14 00:27:48 +00:00
Kostya Serebryany
daa1bf3b74 [asan] rewrite asan's stack frame layout 
Summary:
Rewrite asan's stack frame layout.
First, most of the stack layout logic is moved into a separte file
to make it more testable and (potentially) useful for other projects.
Second, make the frames more compact by using adaptive redzones
(smaller for small objects, larger for large objects).
Third, try to minimized gaps due to large alignments (this is hypothetical since
today we don't see many stack vars aligned by more than 32).

The frames indeed become more compact, but I'll still need to run more benchmarks
before committing, but I am sking for review now to get early feedback.

This change will be accompanied by a trivial change in compiler-rt tests
to match the new frame sizes.

Reviewers: samsonov, dvyukov

Reviewed By: samsonov

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D2324

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196568 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-12-06 09:00:17 +00:00
Kostya Serebryany
64abf5b441 [tsan] fix PR18146: sometimes a variable written into vptr could have an integer type (after other optimizations) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196507 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-12-05 15:03:02 +00:00
Kostya Serebryany
dfb74a58c5 [tsan] fix instrumentation of vector vptr updates (https://code.google.com/p/thread-sanitizer/issues/detail?id=43) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196079 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-12-02 08:07:15 +00:00
Manman Ren
bec50063a5 Debug Info: update testing cases to specify the debug info version number. 
We are going to drop debug info without a version number or with a different
version number, to make sure we don't crash when we see bitcode files with
different debug info metadata format.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195504 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-11-22 21:49:45 +00:00
Peter Collingbourne
934d1f83ae Introduce two command-line flags for the instrumentation pass to control whether the labels of pointers should be ignored in load and store instructions 
The new command line flags are -dfsan-ignore-pointer-label-on-store and -dfsan-ignore-pointer-label-on-load. Their default value matches the current labelling scheme.

Additionally, the function __dfsan_union_load is marked as readonly.

Patch by Lorenzo Martignoni!

Differential Revision: http://llvm-reviews.chandlerc.com/D2187

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195382 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-11-21 23:20:54 +00:00
Evgeniy Stepanov
52658c9db5 [msan] Propagate condition origin in select instruction. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195349 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-11-21 12:00:24 +00:00
Evgeniy Stepanov
ae89383daa Use multiple filecheck prefixes in msan instrumentation tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195342 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-11-21 11:37:16 +00:00
Alexey Samsonov
64409ad8e3 [ASan] Fix PR17867 - make sure ASan doesn't crash if use-after-scope and use-after-return are combined. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195014 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-11-18 14:53:55 +00:00
Bob Wilson
4b8991424a Reapply "[asan] Poor man's coverage that works with ASan" 
I was able to successfully run a bootstrapped LTO build of clang with
r194701, so this change does not seem to be the cause of our failing
buildbots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194789 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-11-15 07:16:09 +00:00
Bob Wilson
2475da80ed Revert "[asan] Poor man's coverage that works with ASan" 
This reverts commit 194701. Apple's bootstrapped LTO builds have been failing,
and this change (along with compiler-rt 194702-194704) is the only thing on
the blamelist.  I will either reappy these changes or help debug the problem,
depending on whether this fixes the buildbots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194780 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-11-15 03:28:22 +00:00
Kostya Serebryany
8cc5f7cd59 [asan] Poor man's coverage that works with ASan 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194701 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-11-14 13:27:41 +00:00
Evgeniy Stepanov
45f5110634 [msan] Use CHECK-DAG instead of CHECK where order of instructions does not matter. 
This may fix hexagon-elf bots.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194700 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-11-14 12:46:12 +00:00
Evgeniy Stepanov
34432aeb6d [msan] Fast path optimization for wrap-indirect-calls feature of MemorySanitizer. 
Indirect call wrapping helps MSanDR (dynamic instrumentation companion tool
for MSan) to catch all cases where execution leaves a compiler-instrumented
module by allowing the tool to rewrite targets of indirect calls.

This change is an optimization that skips wrapping for calls when target is
inside the current module. This relies on the linker providing symbols at the
begin and end of the module code (or code + data, does not really matter).
Gold linker provides such symbols by default. GNU (BFD) linker needs a link
flag: -Wl,--defsym=__executable_start=0.

More info:
https://code.google.com/p/memory-sanitizer/wiki/MSanDR#Native_exec


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194697 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-11-14 12:29:04 +00:00
Evgeniy Stepanov
4590b8c090 [msan] Propagate origin for insertvalue, extractvalue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194374 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-11-11 13:37:10 +00:00
Nuno Lopes
5e1d0d39db fix PR17635: false positive with packed structures 
LLVM optimizers may widen accesses to packed structures that overflow the structure itself, but should be in bounds up to the alignment of the object

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193317 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-10-24 09:17:24 +00:00
Dmitry Vyukov
4ef1999d61 tsan: implement no_sanitize_thread attribute 
If a function has no_sanitize_thread attribute,
do not instrument memory accesses in it.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192871 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-10-17 07:20:06 +00:00
Kostya Serebryany
3386d25257 [asan] Optimize accesses to global arrays with constant index 
Summary:
Given a global array G[N], which is declared in this CU and has static initializer
avoid instrumenting accesses like G[i], where 'i' is a constant and 0<=i<N.
Also add a bit of stats.

This eliminates ~1% of instrumentations on SPEC2006
and also partially helps when asan is being run together with coverage.

Reviewers: samsonov

Reviewed By: samsonov

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1947

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192794 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-10-16 14:06:14 +00:00
Evgeniy Stepanov
95864303f5 [msan] Instrument x86.*_cvt* intrinsics. 
Currently MSan checks that arguments of *cvt* intrinsics are fully initialized.
That's too much to ask: some of them only operate on lower half, or even
quarter, of the input register.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192599 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-10-14 15:16:25 +00:00
Evgeniy Stepanov
a0f6d1651b [msan] Fix handling of scalar select of vectors. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192575 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-10-14 09:52:09 +00:00
Benjamin Kramer
2f08433210 ObjectSizeOffsetEvaluator: Don't run into infinite recursion if we have a cyclic GEP. 
Those can occur in dead code. PR17402.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191644 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-09-29 19:39:13 +00:00
Manman Ren
9e81c3bdb2 TBAA: handle scalar TBAA format and struct-path aware TBAA format. 
Remove the command line argument "struct-path-tbaa" since we should not depend
on command line argument to decide which format the IR file is using. Instead,
we check the first operand of the tbaa tag node, if it is a MDNode, we treat
it as struct-path aware TBAA format, otherwise, we treat it as scalar TBAA
format.

When clang starts to use struct-path aware TBAA format no matter whether
struct-path-tbaa is no, and we can auto-upgrade existing bc files, the support
for scalar TBAA format can be dropped.

Existing testing cases are updated to use the struct-path aware TBAA format.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191538 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-09-27 18:34:27 +00:00
Evgeniy Stepanov
ecf0fcd2b1 [msan] Handling of atomic load/store, atomic rmw, cmpxchg. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191287 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-09-24 11:20:27 +00:00
Evgeniy Stepanov
6591308b7e [msan] Wrap indirect functions. 
Adds a flag to the MemorySanitizer pass that enables runtime rewriting of
indirect calls. This is part of MSanDR implementation and is needed to return
control to the DynamiRio-based helper tool on transition between instrumented
and non-instrumented modules. Disabled by default.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191006 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-09-19 15:22:35 +00:00
Evgeniy Stepanov
e5c8c5a1bc [msan] Check return value of main(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190782 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-09-16 13:24:32 +00:00
Manman Ren
1ed2e1fb92 Debug Info Testing: update context from empty string to null. 
Context should be either null or MDNode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190267 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-09-08 03:11:54 +00:00
Manman Ren
1307103dff Debug Info Testing: updated to use NULL instead of "i32 0" in a few fields. 
Field 2 of DIType (Context), field 9 of DIDerivedType (TypeDerivedFrom),
field 12 of DICompositeType (ContainingType), fields 2, 7, 12 of DISubprogram
(Context, Type, ContainingType).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190205 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-09-06 21:03:58 +00:00
Evgeniy Stepanov
69086b2962 [msan] Fix handling of select with struct arguments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189796 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-09-03 13:05:29 +00:00
Evgeniy Stepanov
6a9b29ec9b [msan] Fix select instrumentation. 
Select condition shadow was being ignored resulting in false negatives.
This change OR-s sign-extended condition shadow into the result shadow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189785 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-09-03 10:04:11 +00:00
Peter Collingbourne
ffba4c7e69 DataFlowSanitizer: Implement trampolines for function pointers passed to custom functions. 
Differential Revision: http://llvm-reviews.chandlerc.com/D1503

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189408 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-08-27 22:09:06 +00:00
Manman Ren
6e3cd0ebe2 Debug Info: add an identifier field to DICompositeType. 
DICompositeType will have an identifier field at position 14. For now, the
field is set to null in DIBuilder.
For DICompositeTypes where the template argument field (the 13th field)
was optional, modify DIBuilder to make sure the template argument field is set.
Now DICompositeType has 15 fields.

Update DIBuilder to use NULL instead of "i32 0" for null value of a MDNode.
Update verifier to check that DICompositeType has 15 fields and the last
field is null or a MDString.

Update testing cases to include an extra field for DICompositeType.
The identifier field will be used by type uniquing so a front end can
genearte a DICompositeType with a unique identifer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189282 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-08-26 22:39:55 +00:00
Peter Collingbourne
f3c0314310 DataFlowSanitizer: correctly combine labels in the case where they are equal. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189133 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-08-23 18:45:06 +00:00
Evgeniy Stepanov
7c7b8e57f8 [msan] Fix handling of va_arg overflow area on x86_64. 
The code was erroneously reading overflow area shadow from the TLS slot,
bypassing the local copy. Reading shadow directly from TLS is wrong, because
it can be overwritten by a nested vararg call, if that happens before va_start.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189104 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-08-23 12:11:00 +00:00
Peter Collingbourne
054cec05b8 DataFlowSanitizer: Replace non-instrumented aliases of instrumented functions, and vice versa, with wrappers. 
Differential Revision: http://llvm-reviews.chandlerc.com/D1442

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189054 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-08-22 20:08:15 +00:00
Peter Collingbourne
f1366c5524 DataFlowSanitizer: Prefix the name of each instrumented function with "dfs$". 
DFSan changes the ABI of each function in the module.  This makes it possible
for a function with the native ABI to be called with the instrumented ABI,
or vice versa, thus possibly invoking undefined behavior.  A simple way
of statically detecting instances of this problem is to prepend the prefix
"dfs$" to the name of each instrumented-ABI function.

This will not catch every such problem; in particular function pointers passed
across the instrumented-native barrier cannot be used on the other side.
These problems could potentially be caught dynamically.

Differential Revision: http://llvm-reviews.chandlerc.com/D1373

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189052 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-08-22 20:08:08 +00:00