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192 Commits

Author SHA1 Message Date
Alp Toker d3d017cf00 Reduce verbiage of lit.local.cfg files 
We can just split targets_to_build in one place and make it immutable.

llvm-svn: 210496
 2014-06-09 22:42:55 +00:00
Evgeniy Stepanov a9b6202d60 Fix test in r210472. 
llvm-svn: 210473
 2014-06-09 14:48:53 +00:00
Evgeniy Stepanov 70d1b0a818 [msan] Workaround for invalid origins in shufflevector. 
Makes origin propagation ignore literal undef operands, and,
in general, any operand we don't have origin for.

https://code.google.com/p/memory-sanitizer/issues/detail?id=56

llvm-svn: 210472
 2014-06-09 14:29:34 +00:00
Evgeniy Stepanov f7c29a9e25 [msan] Fix vector pack intrinsic handling. 
This fixes a crash on MMX intrinsics, as well as a corner case in handling of
all unsigned pack intrinsics.

PR19953.

llvm-svn: 210454
 2014-06-09 08:40:16 +00:00
Rafael Espindola 42a4c9f9e0 Allow aliases to be unnamed_addr. 
Alias with unnamed_addr were in a strange state. It is stored in GlobalValue,
the language reference talks about "unnamed_addr aliases" but the verifier
was rejecting them.

It seems natural to allow unnamed_addr in aliases:

* It is a property of how it is accessed, not of the data itself.
* It is perfectly possible to write code that depends on the address
of an alias.

This patch then makes unname_addr legal for aliases. One side effect is that
the syntax changes for a corner case: In globals, unnamed_addr is now printed
before the address space.

llvm-svn: 210302
 2014-06-06 01:20:28 +00:00
Evgeniy Stepanov 493df136d9 [asancov] Fix coverage line info some more. 
Now it should always point to the opening brace of the function (in
-asan-coverage=1 mode).

llvm-svn: 210266
 2014-06-05 14:34:45 +00:00
Evgeniy Stepanov 19f75fc947 [asan] Fix coverage instrumentation with -asan-globals=0. 
llvm-svn: 210103
 2014-06-03 14:16:00 +00:00
Evgeniy Stepanov d425a2b169 [msan] Handle x86 vector pack intrinsics. 
llvm-svn: 210020
 2014-06-02 12:31:44 +00:00
Alexey Samsonov 82667c7380 [TSan] Fixup a test case after r209939 
llvm-svn: 209945
 2014-05-31 00:26:03 +00:00
Alexey Samsonov 96e239f564 [ASan] Use llvm.global_ctors to insert init-order checking calls into ASan runtime. 
Don't assume that dynamically initialized globals are all initialized from
_GLOBAL__<module_name>I_ function. Instead, scan the llvm.global_ctors and
insert poison/unpoison calls to each function there.

Patch by Nico Weber!

llvm-svn: 209780
 2014-05-29 00:51:15 +00:00
Evgeniy Stepanov 386b58d056 [asancov] Don't emit extra runtime calls when compiling without coverage. 
llvm-svn: 209721
 2014-05-28 09:26:46 +00:00
Evgeniy Stepanov 47b1a95f1c [asancov] Emit an initializer passing number of coverage code locations in each module. 
llvm-svn: 209654
 2014-05-27 12:39:31 +00:00
Kostya Serebryany c7895a83d2 [asan] properly instrument memory accesses that have small alignment (smaller than min(8,size)) by making two checks instead of one. This may slowdown some cases, e.g. long long on 32-bit or wide loads produced after loop unrolling. The benefit is higher sencitivity. 
llvm-svn: 209508
 2014-05-23 11:52:07 +00:00
Evgeniy Stepanov aaf4bb2394 [asan] Set debug location in ASan function prologue. 
Most importantly, it gives debug location info to the coverage callback.

This change also removes 2 cases of unnecessary setDebugLoc when IRBuilder
is created with the same debug location.

llvm-svn: 208767
 2014-05-14 10:30:15 +00:00
Evgeniy Stepanov 9661ec0ec3 [asan] Preserve flags in asm instrumentation. 
Patch by Yuri Gorshenin.

llvm-svn: 208296
 2014-05-08 09:55:24 +00:00
Evgeniy Stepanov c14fc42137 [msan] Fix -fsanitize=memory -fno-integrated-as. 
llvm-svn: 208211
 2014-05-07 14:10:51 +00:00
Evgeniy Stepanov 3819f02819 [asan] Add a flag to control asm instrumentation. 
With this change, asm instrumentation is disabled by default.

llvm-svn: 208167
 2014-05-07 07:54:11 +00:00
Evgeniy Stepanov b6c47a5bd2 [asan] Fix instrumentation of x86 intel syntax inline assembly. 
Patch by Yuri Gorshenin.

llvm-svn: 207092
 2014-04-24 09:56:15 +00:00
Evgeniy Stepanov 0a951b775e Create MCTargetOptions. 
For now it contains a single flag, SanitizeAddress, which enables
AddressSanitizer instrumentation of inline assembly.

Patch by Yuri Gorshenin.

llvm-svn: 206971
 2014-04-23 11:16:03 +00:00
Kostya Serebryany c9a2c17ad3 [asan] Support outline instrumentation for wide types and delete dead code, patch by Yuri Gribov 
llvm-svn: 206883
 2014-04-22 11:19:45 +00:00
Kostya Serebryany 49b88f54da [asan] add llvm-ish test for memset/etc instrumentation 
llvm-svn: 206747
 2014-04-21 11:57:43 +00:00
Evgeniy Stepanov 65120ec8c6 [msan] Add -msan-instrumentation-with-call-threshold. 
This flag replaces inline instrumentation for checks and origin stores with
calls into MSan runtime library. This is a workaround for PR17409.

Disabled by default.

llvm-svn: 206585
 2014-04-18 12:17:20 +00:00
Kostya Serebryany 22e8810838 [asan] one more workaround for PR17409: don't do BB-level coverage instrumentation if there are more than N (=1500) basic blocks. This makes ASanCoverage work on libjpeg_turbo/jchuff.c used by Chrome, which has 1824 BBs 
llvm-svn: 206564
 2014-04-18 08:02:42 +00:00
Kostya Serebryany 0c02d26d6b [asan] add two new hidden compile-time flags for asan: asan-instrumentation-with-call-threshold and asan-memory-access-callback-prefix. This is part of the workaround for PR17409 (instrument huge functions with callbacks instead of inlined code). These flags will also help us experiment with kasan (kernel-asan) and clang 
llvm-svn: 206383
 2014-04-16 12:12:19 +00:00
Evgeniy Stepanov 86f318e8b4 [msan] Relax the test some more. 
This may or may not fix the bots. R204720 did not.

llvm-svn: 204721
 2014-03-25 14:32:05 +00:00
Evgeniy Stepanov d2b07ddfac [msan] Make some tests less strict. 
This may or may not fix the bots.

llvm-svn: 204720
 2014-03-25 14:15:14 +00:00
Evgeniy Stepanov fc742acc8c [msan] More precise instrumentation of select IR. 
Some bits of select result may be initialized even if select condition
is not.

https://code.google.com/p/memory-sanitizer/issues/detail?id=50

llvm-svn: 204716
 2014-03-25 13:08:34 +00:00
Alexander Potapenko 7aafd31dad [ASan] Add -asan-module to the ASan .ll tests. 
After the -asan pass had been split into -asan (function-level) and -asan-module (module-level) some of the
tests have silently stopped working, because they didn't instrument the globals anymore.
We've decided to have every test using both passes, irrespective of the presence of globals in it.

llvm-svn: 204335
 2014-03-20 11:16:34 +00:00
Alexander Potapenko 04969e8b31 [ASan] Do not instrument globals from the llvm.metadata section. 
Fixes https://code.google.com/p/address-sanitizer/issues/detail?id=279.

llvm-svn: 204331
 2014-03-20 10:48:34 +00:00
Evgeniy Stepanov 2275a01a44 Set debug info for instructions inserted in SplitBlockAndInsertIfThen. 
llvm-svn: 204230
 2014-03-19 12:56:38 +00:00
Evgeniy Stepanov 302964ee92 [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.

llvm-svn: 204151
 2014-03-18 13:30:56 +00:00
Evgeniy Stepanov 49e2625144 AddressSanitizer instrumentation for MOV and MOVAPS. 
This is an initial version of *Sanitizer instrumentation of assembly code.

Patch by Yuri Gorshenin.

llvm-svn: 203908
 2014-03-14 08:58:04 +00:00
Evgeniy Stepanov 7ab838eb56 [msan] Fix handling of byval arguments in VarArg calls. 
llvm-svn: 203794
 2014-03-13 13:17:11 +00:00
Tim Northover e94a518a22 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

llvm-svn: 203559
 2014-03-11 10:48:52 +00:00
Evgeniy Stepanov 77be532f71 [msan] Handle X86 SIMD bitshift intrinsics. 
llvm-svn: 202712
 2014-03-03 13:47:42 +00:00
Kostya Serebryany f72bdb47bc [asan] remove test that should have been removed in r202033 
llvm-svn: 202034
 2014-02-24 13:44:24 +00:00
Rafael Espindola daeafb4c2a 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.

llvm-svn: 201700
 2014-02-19 17:23:20 +00:00
Rafael Espindola 2173603825 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.

llvm-svn: 201688
 2014-02-19 15:49:46 +00:00
Rafael Espindola 8b27c4edc6 Now that llvm always does the right thing with private, use it. 
llvm-svn: 201625
 2014-02-19 02:08:39 +00:00
Kostya Serebryany 8baa386670 [asan] support for FreeBSD, LLVM part. patch by Viktor Kutuzov 
llvm-svn: 201067
 2014-02-10 07:37:04 +00:00
Kostya Serebryany 6e15ec1442 [asan] simplify a test 
llvm-svn: 200378
 2014-01-29 07:35:43 +00:00
Kostya Serebryany 714c67c31e [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

llvm-svn: 199488
 2014-01-17 11:00:30 +00:00
Alexander Potapenko cb66fe377a [ASan] Fix the tests broken by r198018 to check for private linkage of ASan-generated globals. 
llvm-svn: 198020
 2013-12-25 17:06:04 +00:00
Kostya Serebryany 530e207d8a [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

llvm-svn: 197907
 2013-12-23 14:15:08 +00:00
Evgeniy Stepanov a9164e9e2a 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.

llvm-svn: 197677
 2013-12-19 13:29:56 +00:00
Matt Arsenault d3ee7af2f4 Teach MemoryBuiltins about address spaces 
llvm-svn: 197292
 2013-12-14 00:27:48 +00:00
Kostya Serebryany 4fb7801b3f [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

llvm-svn: 196568
 2013-12-06 09:00:17 +00:00
Kostya Serebryany 2460c3fc73 [tsan] fix PR18146: sometimes a variable written into vptr could have an integer type (after other optimizations) 
llvm-svn: 196507
 2013-12-05 15:03:02 +00:00
Kostya Serebryany 08b9cf56be [tsan] fix instrumentation of vector vptr updates (https://code.google.com/p/thread-sanitizer/issues/detail?id=43) 
llvm-svn: 196079
 2013-12-02 08:07:15 +00:00
Manman Ren 409558f81e 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.

llvm-svn: 195504
 2013-11-22 21:49:45 +00:00