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2012-04-10[tsan] two more compile-time optimizations:Kostya Serebryany
- don't isntrument reads from constant globals. Saves ~1.5% of instrumented instructions on CPU2006 (counting static instructions, not their execution). - don't insrument reads from vtable (which is a global constant too). Saves ~5%. I did not measure the run-time impact of this, but it is certainly non-negative. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154444 91177308-0d34-0410-b5e6-96231b3b80d8
2012-04-10[tsan] compile-time instrumentation: do not instrument a read ifKostya Serebryany
a write to the same temp follows in the same BB. Also add stats printing. On Spec CPU2006 this optimization saves roughly 4% of instrumented reads (which is 3% of all instrumented accesses): Writes : 161216 Reads : 446458 Reads-before-write: 18295 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154418 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-26[tsan] treat vtable pointer updates in a special way (requires tbaa); fix a ↵Kostya Serebryany
bug (forgot to return true after instrumenting); make sure the tsan tests are run git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153448 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-21[asan] fix one more bug related to long doubleKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153189 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-19[asan] don't emit __asan_mapping_offset/__asan_mapping_scale by default -- ↵Kostya Serebryany
they are currently used only for experiments git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153040 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-14[tsan] use FunctionBlackListKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152755 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-14[asan] rename class BlackList to FunctionBlackList and move it into a ↵Kostya Serebryany
separate file -- we will need the same functionality in ThreadSanitizer git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152753 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-02ASan: use getTypeAllocSize instead of getTypeStoreSize.Evgeniy Stepanov
This change replaces getTypeStoreSize with getTypeAllocSize in AddressSanitizer instrumentation for stack allocations. One case where old behaviour produced undesired results is an optimization in InstCombine pass (PromoteCastOfAllocation), which can replace alloca(T) with alloca(S), where S has the same AllocSize, but a smaller StoreSize. Another case is memcpy(long double => long double), where ASan will poison bytes 10-15 of a stack-allocated long double (StoreSize 10, AllocSize 16, sizeof(long double) = 16). See http://llvm.org/bugs/show_bug.cgi?id=12047 for more context. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151887 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-14[tsan] fix compiler warningsKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150449 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-13ThreadSanitizer, a race detector. First LLVM commit.Kostya Serebryany
Clang patch (flags) will follow shortly. The run-time library will also follow, but not immediately. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150423 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-08[asan] unpoison the stack before every noreturn call. Fixes asan issue 37. ↵Kostya Serebryany
llvm part git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150102 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-07Convert assert(0) to llvm_unreachableCraig Topper
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149967 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-05reapply the patches reverted in r149470 that reenable ConstantDataArray,Chris Lattner
but with a critical fix to the SelectionDAG code that optimizes copies from strings into immediate stores: the previous code was stopping reading string data at the first nul. Address this by adding a new argument to llvm::getConstantStringInfo, preserving the behavior before the patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149800 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-01Revert Chris' commits up to r149348 that started causing VMCoreTests unit ↵Argyrios Kyrtzidis
test to fail. These are: r149348 r149351 r149352 r149354 r149356 r149357 r149361 r149362 r149364 r149365 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149470 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-31eliminate the "string" form of ConstantArray::get, usingChris Lattner
ConstantDataArray::getString instead. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149365 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-30[asan] fix the ObjC support (asan Issue #33)Kostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149300 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-30Fix compilation of ASan tests on OS X Lion (see ↵Alexander Potapenko
http://code.google.com/p/address-sanitizer/issues/detail?id=32) The redzones emitted by AddressSanitizer for CFString instances confuse the linker and are of little use, so we shouldn't add them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149243 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-28[asan] correctly use ConstantExpr::getGetElementPtr. Catch by NAKAMURA TakumiKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149172 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-24[asan] enable asan only for the functions that have Attribute::AddressSafetyKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148846 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-23Implemented AddressSanitizer::getPassName()Alexander Potapenko
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148697 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-11[asan] extend the workaround for http://llvm.org/bugs/show_bug.cgi?id=11395: ↵Kostya Serebryany
don't instrument the function at all on x86_32 if it has a large asm blob git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147953 91177308-0d34-0410-b5e6-96231b3b80d8
2012-01-06[asan] cleanup: remove the SIGILL-related code (compiler part)Kostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147667 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-15[asan] add the name of the module to the description of a global variable. ↵Kostya Serebryany
This improves the readability of global-buffer-overflow reports. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146698 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-15[asan] fix a bug (issue 19) where dlclose and the following mmap caused a ↵Kostya Serebryany
false positive. compiler part. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146688 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-14[asan] remove .preinit_array from the compiler module (it breaks .so ↵Kostya Serebryany
builds). This should be done in the run-time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146527 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-13[asan] report an error if blacklist file contains a malformed regex. fixes ↵Kostya Serebryany
asan issue 17 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146503 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-12LLVMBuild: Remove trailing newline, which irked me.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146409 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-12[asan] use .preinit_array only on linuxKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146379 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-09[asan] call __asan_init from .preinit_array. This simplifies __asan_init vs ↵Kostya Serebryany
malloc chicken-and-egg situation on Android and probably on other flavours of Linux. Patch by eugenis@google.com. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146284 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-06Expose a switch for the new gcov format.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145880 91177308-0d34-0410-b5e6-96231b3b80d8
2011-12-01[asan] two minor fixes: use UnreachableInst after the neverreturn function ↵Kostya Serebryany
call; use report_fatal_error when blacklist file can not be found git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145611 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-29build/CMake: Finish removal of add_llvm_library_dependencies.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145420 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-27Place the "cfg checksum" around a test. This was recently added in April 2011 toNick Lewycky
gcc, though I thought it was older (my gcc 4.4 has it as a local patch. Whoops!) This fixes PR10589. Also add some debugging statements. Remove GcnoFiles, the mapping from CompilationUnit to raw_ostream. Now that we start by iterating over each CU and descending into them, there's no need to maintain a mapping. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145208 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-23[asan] do not instrument threadlocal globals, this is buggyKostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145092 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-18[asan] workaround for reg alloc bug 11395: don't instrument functions with ↵Kostya Serebryany
large chunks of inline assembler git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144962 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-17quick fix: remove GlobalVariable::GlobalVariable mistakenly commited at ↵Kostya Serebryany
r144933. For some reason this compiles on linux git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144936 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-17fall back to explicit list of allowed linkages when instrumenting globals in ↵Kostya Serebryany
asan; add a test check that asan does not touch linkonce_odr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144933 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-16AddressSanitizer, first commit (compiler module only)Kostya Serebryany
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144758 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-15Remove all remaining uses of Value::getNameStr().Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144648 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-03build: Add initial cut at LLVMBuild.txt files.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143634 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-20If simple ownership works then friendship is not required.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140169 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-20Update GCOVLines to provide interfaces to write line table and calculate ↵Devang Patel
complete length. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140167 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-20Update comment.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140156 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-20Use StringRef instead of std::string.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140154 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-20Eliminate unnecessary copy of FileName from GCOVLines. Devang Patel
GCOVLines is always accessed through a StringMap where the key is FileName. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140151 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-20There is no need to write a local utility routine to find subprogram info if ↵Devang Patel
the utility routine is already available in DebugInfo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140145 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-25When inserting new instructions, use getFirstInsertionPt instead ofBill Wendling
getFirstNonPHI so that it will skip over the landingpad instructions as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138537 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-18The edge from DISubprogram to DICompileUnit has been removed in recent versionsNick Lewycky
of debug info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137972 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-17Do not use DebugInfoFinder. Extract debug info directly from llvm.dbg.cu ↵Devang Patel
named mdnode. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137890 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-16Use the getFirstInsertionPt() method instead of getFirstNonPHI + an 'isa<>'Bill Wendling
check for a LandingPadInst. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137745 91177308-0d34-0410-b5e6-96231b3b80d8
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