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181 Commits

Author SHA1 Message Date
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
Peter Collingbourne 0be79e1ade 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

llvm-svn: 195382
 2013-11-21 23:20:54 +00:00
Evgeniy Stepanov cb5bdffc4e [msan] Propagate condition origin in select instruction. 
llvm-svn: 195349
 2013-11-21 12:00:24 +00:00
Evgeniy Stepanov b55c7e7cc4 Use multiple filecheck prefixes in msan instrumentation tests. 
llvm-svn: 195342
 2013-11-21 11:37:16 +00:00
Alexey Samsonov a788b940f7 [ASan] Fix PR17867 - make sure ASan doesn't crash if use-after-scope and use-after-return are combined. 
llvm-svn: 195014
 2013-11-18 14:53:55 +00:00
Bob Wilson da4147c743 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.

llvm-svn: 194789
 2013-11-15 07:16:09 +00:00
Bob Wilson ae73587c4b 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.

llvm-svn: 194780
 2013-11-15 03:28:22 +00:00
Kostya Serebryany 6da3f74061 [asan] Poor man's coverage that works with ASan 
llvm-svn: 194701
 2013-11-14 13:27:41 +00:00
Evgeniy Stepanov b22018abed [msan] Use CHECK-DAG instead of CHECK where order of instructions does not matter. 
This may fix hexagon-elf bots.

llvm-svn: 194700
 2013-11-14 12:46:12 +00:00
Evgeniy Stepanov 585813e33d [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

llvm-svn: 194697
 2013-11-14 12:29:04 +00:00
Evgeniy Stepanov 560e089355 [msan] Propagate origin for insertvalue, extractvalue. 
llvm-svn: 194374
 2013-11-11 13:37:10 +00:00
Nuno Lopes 340b0463e6 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

llvm-svn: 193317
 2013-10-24 09:17:24 +00:00